/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */ /* cairo - a vector graphics library with display and print output * * Copyright © 2004 Red Hat, Inc * Copyright © 2006 Red Hat, Inc * Copyright © 2007, 2008 Adrian Johnson * * This library is free software; you can redistribute it and/or * modify it either under the terms of the GNU Lesser General Public * License version 2.1 as published by the Free Software Foundation * (the "LGPL") or, at your option, under the terms of the Mozilla * Public License Version 1.1 (the "MPL"). If you do not alter this * notice, a recipient may use your version of this file under either * the MPL or the LGPL. * * You should have received a copy of the LGPL along with this library * in the file COPYING-LGPL-2.1; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * You should have received a copy of the MPL along with this library * in the file COPYING-MPL-1.1 * * The contents of this file are subject to the Mozilla Public License * Version 1.1 (the "License"); you may not use this file except in * compliance with the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY * OF ANY KIND, either express or implied. See the LGPL or the MPL for * the specific language governing rights and limitations. * * The Original Code is the cairo graphics library. * * The Initial Developer of the Original Code is University of Southern * California. * * Contributor(s): * Kristian Høgsberg * Carl Worth * Adrian Johnson */ #define _BSD_SOURCE /* for snprintf() */ #include "cairoint.h" #include "cairo-pdf.h" #include "cairo-pdf-surface-private.h" #include "cairo-pdf-operators-private.h" #include "cairo-scaled-font-subsets-private.h" #include "cairo-paginated-private.h" #include "cairo-output-stream-private.h" #include "cairo-meta-surface-private.h" #include "cairo-type3-glyph-surface-private.h" #include #include /* Issues: * * - We embed an image in the stream each time it's composited. We * could add generation counters to surfaces and remember the stream * ID for a particular generation for a particular surface. * * - Backend specific meta data. */ /* * Page Structure of the Generated PDF: * * Each page requiring fallbacks images contains a knockout group at * the top level. The first operation of the knockout group paints a * group containing all the supported drawing operations. Fallback * images (if any) are painted in the knockout group. This ensures * that fallback images do not composite with any content under the * fallback images. * * Streams: * * This PDF surface has three types of streams: * - PDF Stream * - Content Stream * - Group Stream * * Calling _cairo_output_stream_printf (surface->output, ...) will * write to the currently open stream. * * PDF Stream: * A PDF Stream may be opened and closed with the following functions: * _cairo_pdf_surface_open stream () * _cairo_pdf_surface_close_stream () * * PDF Streams are written directly to the PDF file. They are used for * fonts, images and patterns. * * Content Stream: * The Content Stream is opened and closed with the following functions: * _cairo_pdf_surface_open_content_stream () * _cairo_pdf_surface_close_content_stream () * * The Content Stream contains the text and graphics operators. * * Group Stream: * A Group Stream may be opened and closed with the following functions: * _cairo_pdf_surface_open_group () * _cairo_pdf_surface_close_group () * * A Group Stream is a Form XObject. It is used for short sequences * of operators. As the content is very short the group is stored in * memory until it is closed. This allows some optimization such as * including the Resource dictionary and stream length inside the * XObject instead of using an indirect object. */ typedef struct _cairo_pdf_object { long offset; } cairo_pdf_object_t; typedef struct _cairo_pdf_font { unsigned int font_id; unsigned int subset_id; cairo_pdf_resource_t subset_resource; } cairo_pdf_font_t; typedef struct _cairo_pdf_rgb_linear_function { cairo_pdf_resource_t resource; double color1[3]; double color2[3]; } cairo_pdf_rgb_linear_function_t; typedef struct _cairo_pdf_alpha_linear_function { cairo_pdf_resource_t resource; double alpha1; double alpha2; } cairo_pdf_alpha_linear_function_t; static cairo_pdf_resource_t _cairo_pdf_surface_new_object (cairo_pdf_surface_t *surface); static void _cairo_pdf_surface_clear (cairo_pdf_surface_t *surface); static void _cairo_pdf_smask_group_destroy (cairo_pdf_smask_group_t *group); static cairo_status_t _cairo_pdf_surface_add_font (unsigned int font_id, unsigned int subset_id, void *closure); static void _cairo_pdf_group_resources_init (cairo_pdf_group_resources_t *res); static cairo_status_t _cairo_pdf_surface_open_stream (cairo_pdf_surface_t *surface, cairo_pdf_resource_t *resource, cairo_bool_t compressed, const char *fmt, ...) CAIRO_PRINTF_FORMAT(4, 5); static cairo_status_t _cairo_pdf_surface_close_stream (cairo_pdf_surface_t *surface); static cairo_status_t _cairo_pdf_surface_write_page (cairo_pdf_surface_t *surface); static void _cairo_pdf_surface_write_pages (cairo_pdf_surface_t *surface); static cairo_pdf_resource_t _cairo_pdf_surface_write_info (cairo_pdf_surface_t *surface); static cairo_pdf_resource_t _cairo_pdf_surface_write_catalog (cairo_pdf_surface_t *surface); static long _cairo_pdf_surface_write_xref (cairo_pdf_surface_t *surface); static cairo_status_t _cairo_pdf_surface_write_page (cairo_pdf_surface_t *surface); static cairo_status_t _cairo_pdf_surface_emit_font_subsets (cairo_pdf_surface_t *surface); static const cairo_surface_backend_t cairo_pdf_surface_backend; static const cairo_paginated_surface_backend_t cairo_pdf_surface_paginated_backend; static cairo_pdf_resource_t _cairo_pdf_surface_new_object (cairo_pdf_surface_t *surface) { cairo_pdf_resource_t resource; cairo_status_t status; cairo_pdf_object_t object; object.offset = _cairo_output_stream_get_position (surface->output); status = _cairo_array_append (&surface->objects, &object); if (status) { resource.id = 0; return resource; } resource = surface->next_available_resource; surface->next_available_resource.id++; return resource; } static void _cairo_pdf_surface_update_object (cairo_pdf_surface_t *surface, cairo_pdf_resource_t resource) { cairo_pdf_object_t *object; object = _cairo_array_index (&surface->objects, resource.id - 1); object->offset = _cairo_output_stream_get_position (surface->output); } static void _cairo_pdf_surface_set_size_internal (cairo_pdf_surface_t *surface, double width, double height) { surface->width = width; surface->height = height; cairo_matrix_init (&surface->cairo_to_pdf, 1, 0, 0, -1, 0, height); _cairo_pdf_operators_set_cairo_to_pdf_matrix (&surface->pdf_operators, &surface->cairo_to_pdf); } static cairo_surface_t * _cairo_pdf_surface_create_for_stream_internal (cairo_output_stream_t *output, double width, double height) { cairo_pdf_surface_t *surface; cairo_status_t status, status_ignored; surface = malloc (sizeof (cairo_pdf_surface_t)); if (surface == NULL) { /* destroy stream on behalf of caller */ status = _cairo_output_stream_destroy (output); return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY)); } _cairo_surface_init (&surface->base, &cairo_pdf_surface_backend, CAIRO_CONTENT_COLOR_ALPHA); surface->output = output; surface->width = width; surface->height = height; cairo_matrix_init (&surface->cairo_to_pdf, 1, 0, 0, -1, 0, height); _cairo_array_init (&surface->objects, sizeof (cairo_pdf_object_t)); _cairo_array_init (&surface->pages, sizeof (cairo_pdf_resource_t)); _cairo_array_init (&surface->rgb_linear_functions, sizeof (cairo_pdf_rgb_linear_function_t)); _cairo_array_init (&surface->alpha_linear_functions, sizeof (cairo_pdf_alpha_linear_function_t)); _cairo_array_init (&surface->fonts, sizeof (cairo_pdf_font_t)); _cairo_array_init (&surface->patterns, sizeof (cairo_pdf_pattern_t)); _cairo_array_init (&surface->smask_groups, sizeof (cairo_pdf_smask_group_t *)); _cairo_array_init (&surface->knockout_group, sizeof (cairo_pdf_resource_t)); _cairo_pdf_group_resources_init (&surface->resources); surface->font_subsets = _cairo_scaled_font_subsets_create_composite (); if (! surface->font_subsets) { status = _cairo_error (CAIRO_STATUS_NO_MEMORY); goto BAIL0; } surface->next_available_resource.id = 1; surface->pages_resource = _cairo_pdf_surface_new_object (surface); if (surface->pages_resource.id == 0) { status = _cairo_error (CAIRO_STATUS_NO_MEMORY); goto BAIL1; } surface->compress_content = TRUE; surface->pdf_stream.active = FALSE; surface->pdf_stream.old_output = NULL; surface->group_stream.active = FALSE; surface->group_stream.stream = NULL; surface->group_stream.mem_stream = NULL; surface->paginated_mode = CAIRO_PAGINATED_MODE_ANALYZE; surface->force_fallbacks = FALSE; surface->select_pattern_gstate_saved = FALSE; surface->current_pattern_is_solid_color = FALSE; _cairo_pdf_operators_init (&surface->pdf_operators, surface->output, &surface->cairo_to_pdf, surface->font_subsets); _cairo_pdf_operators_set_font_subsets_callback (&surface->pdf_operators, _cairo_pdf_surface_add_font, surface); /* Document header */ _cairo_output_stream_printf (surface->output, "%%PDF-1.4\n"); _cairo_output_stream_printf (surface->output, "%%%c%c%c%c\n", 181, 237, 174, 251); surface->paginated_surface = _cairo_paginated_surface_create ( &surface->base, CAIRO_CONTENT_COLOR_ALPHA, width, height, &cairo_pdf_surface_paginated_backend); status = surface->paginated_surface->status; if (status == CAIRO_STATUS_SUCCESS) { /* paginated keeps the only reference to surface now, drop ours */ cairo_surface_destroy (&surface->base); return surface->paginated_surface; } BAIL1: _cairo_scaled_font_subsets_destroy (surface->font_subsets); BAIL0: _cairo_array_fini (&surface->objects); free (surface); /* destroy stream on behalf of caller */ status_ignored = _cairo_output_stream_destroy (output); return _cairo_surface_create_in_error (status); } /** * cairo_pdf_surface_create_for_stream: * @write_func: a #cairo_write_func_t to accept the output data * @closure: the closure argument for @write_func * @width_in_points: width of the surface, in points (1 point == 1/72.0 inch) * @height_in_points: height of the surface, in points (1 point == 1/72.0 inch) * * Creates a PDF surface of the specified size in points to be written * incrementally to the stream represented by @write_func and @closure. * * Return value: a pointer to the newly created surface. The caller * owns the surface and should call cairo_surface_destroy() when done * with it. * * This function always returns a valid pointer, but it will return a * pointer to a "nil" surface if an error such as out of memory * occurs. You can use cairo_surface_status() to check for this. * * Since: 1.2 */ cairo_surface_t * cairo_pdf_surface_create_for_stream (cairo_write_func_t write_func, void *closure, double width_in_points, double height_in_points) { cairo_output_stream_t *output; output = _cairo_output_stream_create (write_func, NULL, closure); if (_cairo_output_stream_get_status (output)) return _cairo_surface_create_in_error (_cairo_output_stream_destroy (output)); return _cairo_pdf_surface_create_for_stream_internal (output, width_in_points, height_in_points); } /** * cairo_pdf_surface_create: * @filename: a filename for the PDF output (must be writable) * @width_in_points: width of the surface, in points (1 point == 1/72.0 inch) * @height_in_points: height of the surface, in points (1 point == 1/72.0 inch) * * Creates a PDF surface of the specified size in points to be written * to @filename. * * Return value: a pointer to the newly created surface. The caller * owns the surface and should call cairo_surface_destroy() when done * with it. * * This function always returns a valid pointer, but it will return a * pointer to a "nil" surface if an error such as out of memory * occurs. You can use cairo_surface_status() to check for this. * * Since: 1.2 **/ cairo_surface_t * cairo_pdf_surface_create (const char *filename, double width_in_points, double height_in_points) { cairo_output_stream_t *output; output = _cairo_output_stream_create_for_filename (filename); if (_cairo_output_stream_get_status (output)) return _cairo_surface_create_in_error (_cairo_output_stream_destroy (output)); return _cairo_pdf_surface_create_for_stream_internal (output, width_in_points, height_in_points); } static cairo_bool_t _cairo_surface_is_pdf (cairo_surface_t *surface) { return surface->backend == &cairo_pdf_surface_backend; } /* If the abstract_surface is a paginated surface, and that paginated * surface's target is a pdf_surface, then set pdf_surface to that * target. Otherwise return %CAIRO_STATUS_SURFACE_TYPE_MISMATCH. */ static cairo_status_t _extract_pdf_surface (cairo_surface_t *surface, cairo_pdf_surface_t **pdf_surface) { cairo_surface_t *target; if (surface->status) return surface->status; if (! _cairo_surface_is_paginated (surface)) return _cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH); target = _cairo_paginated_surface_get_target (surface); if (target->status) return target->status; if (! _cairo_surface_is_pdf (target)) return _cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH); *pdf_surface = (cairo_pdf_surface_t *) target; return CAIRO_STATUS_SUCCESS; } /** * cairo_pdf_surface_set_size: * @surface: a PDF #cairo_surface_t * @width_in_points: new surface width, in points (1 point == 1/72.0 inch) * @height_in_points: new surface height, in points (1 point == 1/72.0 inch) * * Changes the size of a PDF surface for the current (and * subsequent) pages. * * This function should only be called before any drawing operations * have been performed on the current page. The simplest way to do * this is to call this function immediately after creating the * surface or immediately after completing a page with either * cairo_show_page() or cairo_copy_page(). * * Since: 1.2 **/ void cairo_pdf_surface_set_size (cairo_surface_t *surface, double width_in_points, double height_in_points) { cairo_pdf_surface_t *pdf_surface = NULL; /* hide compiler warning */ cairo_status_t status; status = _extract_pdf_surface (surface, &pdf_surface); if (status) { status = _cairo_surface_set_error (surface, status); return; } _cairo_pdf_surface_set_size_internal (pdf_surface, width_in_points, height_in_points); status = _cairo_paginated_surface_set_size (pdf_surface->paginated_surface, width_in_points, height_in_points); if (status) status = _cairo_surface_set_error (surface, status); } static void _cairo_pdf_surface_clear (cairo_pdf_surface_t *surface) { int i, size; cairo_pdf_pattern_t *pattern; cairo_pdf_smask_group_t *group; size = _cairo_array_num_elements (&surface->patterns); for (i = 0; i < size; i++) { pattern = (cairo_pdf_pattern_t *) _cairo_array_index (&surface->patterns, i); cairo_pattern_destroy (pattern->pattern); } _cairo_array_truncate (&surface->patterns, 0); size = _cairo_array_num_elements (&surface->smask_groups); for (i = 0; i < size; i++) { _cairo_array_copy_element (&surface->smask_groups, i, &group); _cairo_pdf_smask_group_destroy (group); } _cairo_array_truncate (&surface->smask_groups, 0); _cairo_array_truncate (&surface->knockout_group, 0); } static void _cairo_pdf_group_resources_init (cairo_pdf_group_resources_t *res) { _cairo_array_init (&res->alphas, sizeof (double)); _cairo_array_init (&res->smasks, sizeof (cairo_pdf_resource_t)); _cairo_array_init (&res->patterns, sizeof (cairo_pdf_resource_t)); _cairo_array_init (&res->xobjects, sizeof (cairo_pdf_resource_t)); _cairo_array_init (&res->fonts, sizeof (cairo_pdf_font_t)); } static void _cairo_pdf_group_resources_fini (cairo_pdf_group_resources_t *res) { _cairo_array_fini (&res->alphas); _cairo_array_fini (&res->smasks); _cairo_array_fini (&res->patterns); _cairo_array_fini (&res->xobjects); _cairo_array_fini (&res->fonts); } static void _cairo_pdf_group_resources_clear (cairo_pdf_group_resources_t *res) { _cairo_array_truncate (&res->alphas, 0); _cairo_array_truncate (&res->smasks, 0); _cairo_array_truncate (&res->patterns, 0); _cairo_array_truncate (&res->xobjects, 0); _cairo_array_truncate (&res->fonts, 0); } static cairo_status_t _cairo_pdf_surface_add_alpha (cairo_pdf_surface_t *surface, double alpha, int *index) { int num_alphas, i; double other; cairo_status_t status; cairo_pdf_group_resources_t *res = &surface->resources; num_alphas = _cairo_array_num_elements (&res->alphas); for (i = 0; i < num_alphas; i++) { _cairo_array_copy_element (&res->alphas, i, &other); if (alpha == other) { *index = i; return CAIRO_STATUS_SUCCESS; } } status = _cairo_array_append (&res->alphas, &alpha); if (status) return status; *index = _cairo_array_num_elements (&res->alphas) - 1; return CAIRO_STATUS_SUCCESS; } static cairo_status_t _cairo_pdf_surface_add_smask (cairo_pdf_surface_t *surface, cairo_pdf_resource_t smask) { return _cairo_array_append (&(surface->resources.smasks), &smask); } static cairo_status_t _cairo_pdf_surface_add_pattern (cairo_pdf_surface_t *surface, cairo_pdf_resource_t pattern) { return _cairo_array_append (&(surface->resources.patterns), &pattern); } static cairo_status_t _cairo_pdf_surface_add_xobject (cairo_pdf_surface_t *surface, cairo_pdf_resource_t xobject) { return _cairo_array_append (&(surface->resources.xobjects), &xobject); } static cairo_status_t _cairo_pdf_surface_add_font (unsigned int font_id, unsigned int subset_id, void *closure) { cairo_pdf_surface_t *surface = closure; cairo_pdf_font_t font; int num_fonts, i; cairo_status_t status; cairo_pdf_group_resources_t *res = &surface->resources; num_fonts = _cairo_array_num_elements (&res->fonts); for (i = 0; i < num_fonts; i++) { _cairo_array_copy_element (&res->fonts, i, &font); if (font.font_id == font_id && font.subset_id == subset_id) return CAIRO_STATUS_SUCCESS; } num_fonts = _cairo_array_num_elements (&surface->fonts); for (i = 0; i < num_fonts; i++) { _cairo_array_copy_element (&surface->fonts, i, &font); if (font.font_id == font_id && font.subset_id == subset_id) return _cairo_array_append (&res->fonts, &font); } font.font_id = font_id; font.subset_id = subset_id; font.subset_resource = _cairo_pdf_surface_new_object (surface); if (font.subset_resource.id == 0) return _cairo_error (CAIRO_STATUS_NO_MEMORY); status = _cairo_array_append (&surface->fonts, &font); if (status) return status; return _cairo_array_append (&res->fonts, &font); } static cairo_pdf_resource_t _cairo_pdf_surface_get_font_resource (cairo_pdf_surface_t *surface, unsigned int font_id, unsigned int subset_id) { cairo_pdf_font_t font; int num_fonts, i; num_fonts = _cairo_array_num_elements (&surface->fonts); for (i = 0; i < num_fonts; i++) { _cairo_array_copy_element (&surface->fonts, i, &font); if (font.font_id == font_id && font.subset_id == subset_id) return font.subset_resource; } font.subset_resource.id = 0; return font.subset_resource; } static void _cairo_pdf_surface_emit_group_resources (cairo_pdf_surface_t *surface, cairo_pdf_group_resources_t *res) { int num_alphas, num_smasks, num_resources, i; double alpha; cairo_pdf_resource_t *smask, *pattern, *xobject; cairo_pdf_font_t *font; _cairo_output_stream_printf (surface->output, "<<\n"); num_alphas = _cairo_array_num_elements (&res->alphas); num_smasks = _cairo_array_num_elements (&res->smasks); if (num_alphas > 0 || num_smasks > 0) { _cairo_output_stream_printf (surface->output, " /ExtGState <<\n"); for (i = 0; i < num_alphas; i++) { _cairo_array_copy_element (&res->alphas, i, &alpha); _cairo_output_stream_printf (surface->output, " /a%d << /CA %f /ca %f >>\n", i, alpha, alpha); } for (i = 0; i < num_smasks; i++) { smask = _cairo_array_index (&res->smasks, i); _cairo_output_stream_printf (surface->output, " /s%d %d 0 R\n", smask->id, smask->id); } _cairo_output_stream_printf (surface->output, " >>\n"); } num_resources = _cairo_array_num_elements (&res->patterns); if (num_resources > 0) { _cairo_output_stream_printf (surface->output, " /Pattern <<"); for (i = 0; i < num_resources; i++) { pattern = _cairo_array_index (&res->patterns, i); _cairo_output_stream_printf (surface->output, " /p%d %d 0 R", pattern->id, pattern->id); } _cairo_output_stream_printf (surface->output, " >>\n"); } num_resources = _cairo_array_num_elements (&res->xobjects); if (num_resources > 0) { _cairo_output_stream_printf (surface->output, " /XObject <<"); for (i = 0; i < num_resources; i++) { xobject = _cairo_array_index (&res->xobjects, i); _cairo_output_stream_printf (surface->output, " /x%d %d 0 R", xobject->id, xobject->id); } _cairo_output_stream_printf (surface->output, " >>\n"); } num_resources = _cairo_array_num_elements (&res->fonts); if (num_resources > 0) { _cairo_output_stream_printf (surface->output," /Font <<\n"); for (i = 0; i < num_resources; i++) { font = _cairo_array_index (&res->fonts, i); _cairo_output_stream_printf (surface->output, " /f-%d-%d %d 0 R\n", font->font_id, font->subset_id, font->subset_resource.id); } _cairo_output_stream_printf (surface->output, " >>\n"); } _cairo_output_stream_printf (surface->output, ">>\n"); } static cairo_pdf_smask_group_t * _cairo_pdf_surface_create_smask_group (cairo_pdf_surface_t *surface) { cairo_pdf_smask_group_t *group; group = calloc (1, sizeof (cairo_pdf_smask_group_t)); if (group == NULL) { _cairo_error_throw (CAIRO_STATUS_NO_MEMORY); return NULL; } group->group_res = _cairo_pdf_surface_new_object (surface); if (group->group_res.id == 0) { _cairo_error_throw (CAIRO_STATUS_NO_MEMORY); free (group); return NULL; } group->width = surface->width; group->height = surface->height; return group; } static void _cairo_pdf_smask_group_destroy (cairo_pdf_smask_group_t *group) { if (group->operation == PDF_FILL || group->operation == PDF_STROKE) _cairo_path_fixed_fini (&group->path); if (group->source) cairo_pattern_destroy (group->source); if (group->mask) cairo_pattern_destroy (group->mask); if (group->utf8) free (group->utf8); if (group->glyphs) free (group->glyphs); if (group->clusters) free (group->clusters); if (group->scaled_font) cairo_scaled_font_destroy (group->scaled_font); free (group); } static cairo_status_t _cairo_pdf_surface_add_smask_group (cairo_pdf_surface_t *surface, cairo_pdf_smask_group_t *group) { return _cairo_array_append (&surface->smask_groups, &group); } static cairo_status_t _cairo_pdf_surface_add_pdf_pattern (cairo_pdf_surface_t *surface, cairo_pattern_t *pattern, cairo_pdf_resource_t *pattern_res, cairo_pdf_resource_t *gstate_res) { cairo_pdf_pattern_t pdf_pattern; cairo_status_t status; /* Solid colors are emitted into the content stream */ if (pattern->type == CAIRO_PATTERN_TYPE_SOLID) { pattern_res->id = 0; gstate_res->id = 0; return CAIRO_STATUS_SUCCESS; } if (pattern->type == CAIRO_PATTERN_TYPE_LINEAR || pattern->type == CAIRO_PATTERN_TYPE_RADIAL) { cairo_gradient_pattern_t *gradient; gradient = (cairo_gradient_pattern_t *) pattern; /* Gradients with zero stops do not produce any output */ if (gradient->n_stops == 0) return CAIRO_INT_STATUS_NOTHING_TO_DO; /* Gradients with one stop are the same as solid colors */ if (gradient->n_stops == 1) { pattern_res->id = 0; gstate_res->id = 0; return CAIRO_STATUS_SUCCESS; } } pdf_pattern.pattern = cairo_pattern_reference (pattern); pdf_pattern.pattern_res = _cairo_pdf_surface_new_object (surface); if (pdf_pattern.pattern_res.id == 0) { cairo_pattern_destroy (pattern); return _cairo_error (CAIRO_STATUS_NO_MEMORY); } pdf_pattern.gstate_res.id = 0; /* gradient patterns require an smask object to implement transparency */ if (pattern->type == CAIRO_PATTERN_TYPE_LINEAR || pattern->type == CAIRO_PATTERN_TYPE_RADIAL) { if (_cairo_pattern_is_opaque (pattern) == FALSE) { pdf_pattern.gstate_res = _cairo_pdf_surface_new_object (surface); if (pdf_pattern.gstate_res.id == 0) { cairo_pattern_destroy (pattern); return _cairo_error (CAIRO_STATUS_NO_MEMORY); } } } pdf_pattern.width = surface->width; pdf_pattern.height = surface->height; *pattern_res = pdf_pattern.pattern_res; *gstate_res = pdf_pattern.gstate_res; status = _cairo_array_append (&surface->patterns, &pdf_pattern); if (status) { cairo_pattern_destroy (pattern); return status; } return CAIRO_STATUS_SUCCESS; } static cairo_status_t _cairo_pdf_surface_open_stream (cairo_pdf_surface_t *surface, cairo_pdf_resource_t *resource, cairo_bool_t compressed, const char *fmt, ...) { va_list ap; cairo_pdf_resource_t self, length; cairo_output_stream_t *output = NULL; if (resource) { self = *resource; _cairo_pdf_surface_update_object (surface, self); } else { self = _cairo_pdf_surface_new_object (surface); if (self.id == 0) return _cairo_error (CAIRO_STATUS_NO_MEMORY); } length = _cairo_pdf_surface_new_object (surface); if (length.id == 0) return _cairo_error (CAIRO_STATUS_NO_MEMORY); if (compressed) { output = _cairo_deflate_stream_create (surface->output); if (_cairo_output_stream_get_status (output)) return _cairo_output_stream_destroy (output); } surface->pdf_stream.active = TRUE; surface->pdf_stream.self = self; surface->pdf_stream.length = length; surface->pdf_stream.compressed = compressed; surface->current_pattern_is_solid_color = FALSE; _cairo_pdf_operators_reset (&surface->pdf_operators); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Length %d 0 R\n", surface->pdf_stream.self.id, surface->pdf_stream.length.id); if (compressed) _cairo_output_stream_printf (surface->output, " /Filter /FlateDecode\n"); if (fmt != NULL) { va_start (ap, fmt); _cairo_output_stream_vprintf (surface->output, fmt, ap); va_end (ap); } _cairo_output_stream_printf (surface->output, ">>\n" "stream\n"); surface->pdf_stream.start_offset = _cairo_output_stream_get_position (surface->output); if (compressed) { assert (surface->pdf_stream.old_output == NULL); surface->pdf_stream.old_output = surface->output; surface->output = output; _cairo_pdf_operators_set_stream (&surface->pdf_operators, surface->output); } return _cairo_output_stream_get_status (surface->output); } static cairo_status_t _cairo_pdf_surface_close_stream (cairo_pdf_surface_t *surface) { cairo_status_t status = CAIRO_STATUS_SUCCESS; long length; if (! surface->pdf_stream.active) return CAIRO_STATUS_SUCCESS; status = _cairo_pdf_operators_flush (&surface->pdf_operators); if (status) return status; if (surface->pdf_stream.compressed) { status = _cairo_output_stream_destroy (surface->output); surface->output = surface->pdf_stream.old_output; _cairo_pdf_operators_set_stream (&surface->pdf_operators, surface->output); surface->pdf_stream.old_output = NULL; _cairo_output_stream_printf (surface->output, "\n"); } length = _cairo_output_stream_get_position (surface->output) - surface->pdf_stream.start_offset; _cairo_output_stream_printf (surface->output, "endstream\n" "endobj\n"); _cairo_pdf_surface_update_object (surface, surface->pdf_stream.length); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" " %ld\n" "endobj\n", surface->pdf_stream.length.id, length); surface->pdf_stream.active = FALSE; if (status == CAIRO_STATUS_SUCCESS) status = _cairo_output_stream_get_status (surface->output); return status; } static void _cairo_pdf_surface_write_memory_stream (cairo_pdf_surface_t *surface, cairo_output_stream_t *mem_stream, cairo_pdf_resource_t resource, cairo_pdf_group_resources_t *resources, cairo_bool_t is_knockout_group) { _cairo_pdf_surface_update_object (surface, resource); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Type /XObject\n" " /Length %d\n", resource.id, _cairo_memory_stream_length (mem_stream)); if (surface->compress_content) { _cairo_output_stream_printf (surface->output, " /Filter /FlateDecode\n"); } _cairo_output_stream_printf (surface->output, " /Subtype /Form\n" " /BBox [ 0 0 %f %f ]\n" " /Group <<\n" " /Type /Group\n" " /S /Transparency\n" " /CS /DeviceRGB\n", surface->width, surface->height); if (is_knockout_group) _cairo_output_stream_printf (surface->output, " /K true\n"); _cairo_output_stream_printf (surface->output, " >>\n" " /Resources\n"); _cairo_pdf_surface_emit_group_resources (surface, resources); _cairo_output_stream_printf (surface->output, ">>\n" "stream\n"); _cairo_memory_stream_copy (mem_stream, surface->output); _cairo_output_stream_printf (surface->output, "endstream\n" "endobj\n"); } static cairo_status_t _cairo_pdf_surface_open_group (cairo_pdf_surface_t *surface, cairo_pdf_resource_t *resource) { cairo_status_t status; assert (surface->pdf_stream.active == FALSE); assert (surface->group_stream.active == FALSE); surface->group_stream.active = TRUE; surface->current_pattern_is_solid_color = FALSE; _cairo_pdf_operators_reset (&surface->pdf_operators); surface->group_stream.mem_stream = _cairo_memory_stream_create (); if (surface->compress_content) { surface->group_stream.stream = _cairo_deflate_stream_create (surface->group_stream.mem_stream); } else { surface->group_stream.stream = surface->group_stream.mem_stream; } status = _cairo_output_stream_get_status (surface->group_stream.stream); surface->group_stream.old_output = surface->output; surface->output = surface->group_stream.stream; _cairo_pdf_operators_set_stream (&surface->pdf_operators, surface->output); _cairo_pdf_group_resources_clear (&surface->resources); if (resource) { surface->group_stream.resource = *resource; } else { surface->group_stream.resource = _cairo_pdf_surface_new_object (surface); if (surface->group_stream.resource.id == 0) return _cairo_error (CAIRO_STATUS_NO_MEMORY); } surface->group_stream.is_knockout = FALSE; return status; } static cairo_status_t _cairo_pdf_surface_open_knockout_group (cairo_pdf_surface_t *surface) { cairo_status_t status; status = _cairo_pdf_surface_open_group (surface, NULL); if (status) return status; surface->group_stream.is_knockout = TRUE; return CAIRO_STATUS_SUCCESS; } static cairo_status_t _cairo_pdf_surface_close_group (cairo_pdf_surface_t *surface, cairo_pdf_resource_t *group) { cairo_status_t status = CAIRO_STATUS_SUCCESS, status2; assert (surface->pdf_stream.active == FALSE); assert (surface->group_stream.active == TRUE); status = _cairo_pdf_operators_flush (&surface->pdf_operators); if (status) return status; if (surface->compress_content) { status = _cairo_output_stream_destroy (surface->group_stream.stream); surface->group_stream.stream = NULL; _cairo_output_stream_printf (surface->group_stream.mem_stream, "\n"); } surface->output = surface->group_stream.old_output; _cairo_pdf_operators_set_stream (&surface->pdf_operators, surface->output); surface->group_stream.active = FALSE; _cairo_pdf_surface_write_memory_stream (surface, surface->group_stream.mem_stream, surface->group_stream.resource, &surface->resources, surface->group_stream.is_knockout); if (group) *group = surface->group_stream.resource; status2 = _cairo_output_stream_destroy (surface->group_stream.mem_stream); if (status == CAIRO_STATUS_SUCCESS) status = status2; surface->group_stream.mem_stream = NULL; surface->group_stream.stream = NULL; return status; } static cairo_status_t _cairo_pdf_surface_open_content_stream (cairo_pdf_surface_t *surface, cairo_bool_t is_form) { cairo_status_t status; assert (surface->pdf_stream.active == FALSE); assert (surface->group_stream.active == FALSE); surface->content_resources = _cairo_pdf_surface_new_object (surface); if (surface->content_resources.id == 0) return _cairo_error (CAIRO_STATUS_NO_MEMORY); if (is_form) { status = _cairo_pdf_surface_open_stream (surface, NULL, surface->compress_content, " /Type /XObject\n" " /Subtype /Form\n" " /BBox [ 0 0 %f %f ]\n" " /Group <<\n" " /Type /Group\n" " /S /Transparency\n" " /CS /DeviceRGB\n" " >>\n" " /Resources %d 0 R\n", surface->width, surface->height, surface->content_resources.id); } else { status = _cairo_pdf_surface_open_stream (surface, NULL, surface->compress_content, NULL); } if (status) return status; surface->content = surface->pdf_stream.self; _cairo_output_stream_printf (surface->output, "q\n"); return _cairo_output_stream_get_status (surface->output); } static cairo_status_t _cairo_pdf_surface_close_content_stream (cairo_pdf_surface_t *surface) { cairo_status_t status; assert (surface->pdf_stream.active == TRUE); assert (surface->group_stream.active == FALSE); status = _cairo_pdf_operators_flush (&surface->pdf_operators); if (status) return status; _cairo_output_stream_printf (surface->output, "Q\n"); status = _cairo_pdf_surface_close_stream (surface); if (status) return status; _cairo_pdf_surface_update_object (surface, surface->content_resources); _cairo_output_stream_printf (surface->output, "%d 0 obj\n", surface->content_resources.id); _cairo_pdf_surface_emit_group_resources (surface, &surface->resources); _cairo_output_stream_printf (surface->output, "endobj\n"); return _cairo_output_stream_get_status (surface->output); } static cairo_surface_t * _cairo_pdf_surface_create_similar (void *abstract_surface, cairo_content_t content, int width, int height) { return _cairo_meta_surface_create (content, width, height); } static cairo_status_t _cairo_pdf_surface_finish (void *abstract_surface) { cairo_pdf_surface_t *surface = abstract_surface; long offset; cairo_pdf_resource_t info, catalog; cairo_status_t status, status2; status = surface->base.status; if (status == CAIRO_STATUS_SUCCESS) status = _cairo_pdf_surface_emit_font_subsets (surface); _cairo_pdf_surface_write_pages (surface); info = _cairo_pdf_surface_write_info (surface); if (info.id == 0 && status == CAIRO_STATUS_SUCCESS) status = _cairo_error (CAIRO_STATUS_NO_MEMORY); catalog = _cairo_pdf_surface_write_catalog (surface); if (catalog.id == 0 && status == CAIRO_STATUS_SUCCESS) status = _cairo_error (CAIRO_STATUS_NO_MEMORY); offset = _cairo_pdf_surface_write_xref (surface); _cairo_output_stream_printf (surface->output, "trailer\n" "<< /Size %d\n" " /Root %d 0 R\n" " /Info %d 0 R\n" ">>\n", surface->next_available_resource.id, catalog.id, info.id); _cairo_output_stream_printf (surface->output, "startxref\n" "%ld\n" "%%%%EOF\n", offset); status2 = _cairo_pdf_operators_fini (&surface->pdf_operators); /* pdf_operators has already been flushed when the last stream was * closed so we should never be writing anything here. */ assert(status2 == CAIRO_STATUS_SUCCESS); /* close any active streams still open due to fatal errors */ status2 = _cairo_pdf_surface_close_stream (surface); if (status == CAIRO_STATUS_SUCCESS) status = status2; if (surface->group_stream.stream != NULL) { status2 = _cairo_output_stream_destroy (surface->group_stream.stream); if (status == CAIRO_STATUS_SUCCESS) status = status2; } if (surface->group_stream.mem_stream != NULL) { status2 = _cairo_output_stream_destroy (surface->group_stream.mem_stream); if (status == CAIRO_STATUS_SUCCESS) status = status2; } if (surface->pdf_stream.active) surface->output = surface->pdf_stream.old_output; if (surface->group_stream.active) surface->output = surface->group_stream.old_output; /* and finish the pdf surface */ status2 = _cairo_output_stream_destroy (surface->output); if (status == CAIRO_STATUS_SUCCESS) status = status2; _cairo_pdf_surface_clear (surface); _cairo_pdf_group_resources_fini (&surface->resources); _cairo_array_fini (&surface->objects); _cairo_array_fini (&surface->pages); _cairo_array_fini (&surface->rgb_linear_functions); _cairo_array_fini (&surface->alpha_linear_functions); _cairo_array_fini (&surface->patterns); _cairo_array_fini (&surface->smask_groups); _cairo_array_fini (&surface->fonts); _cairo_array_fini (&surface->knockout_group); if (surface->font_subsets) { _cairo_scaled_font_subsets_destroy (surface->font_subsets); surface->font_subsets = NULL; } return status; } static cairo_int_status_t _cairo_pdf_surface_start_page (void *abstract_surface) { cairo_pdf_surface_t *surface = abstract_surface; _cairo_pdf_group_resources_clear (&surface->resources); return CAIRO_STATUS_SUCCESS; } static cairo_int_status_t _cairo_pdf_surface_has_fallback_images (void *abstract_surface, cairo_bool_t has_fallbacks) { cairo_status_t status; cairo_pdf_surface_t *surface = abstract_surface; surface->has_fallback_images = has_fallbacks; status = _cairo_pdf_surface_open_content_stream (surface, has_fallbacks); if (status) return status; return CAIRO_STATUS_SUCCESS; } /* Emit alpha channel from the image into the given data, providing * an id that can be used to reference the resulting SMask object. * * In the case that the alpha channel happens to be all opaque, then * no SMask object will be emitted and *id_ret will be set to 0. */ static cairo_status_t _cairo_pdf_surface_emit_smask (cairo_pdf_surface_t *surface, cairo_image_surface_t *image, cairo_pdf_resource_t *stream_ret) { cairo_status_t status = CAIRO_STATUS_SUCCESS; char *alpha; unsigned long alpha_size; uint32_t *pixel32; uint8_t *pixel8; int i, x, y; cairo_bool_t opaque; uint8_t a; /* This is the only image format we support, which simplifies things. */ assert (image->format == CAIRO_FORMAT_ARGB32 || image->format == CAIRO_FORMAT_A8 || image->format == CAIRO_FORMAT_A1 ); stream_ret->id = 0; if (image->format == CAIRO_FORMAT_A1) { alpha_size = (image->width + 7) / 8 * image->height; alpha = _cairo_malloc_ab ((image->width+7) / 8, image->height); } else { alpha_size = image->height * image->width; alpha = _cairo_malloc_ab (image->height, image->width); } if (alpha == NULL) { status = _cairo_error (CAIRO_STATUS_NO_MEMORY); goto CLEANUP; } opaque = TRUE; i = 0; for (y = 0; y < image->height; y++) { if (image->format == CAIRO_FORMAT_ARGB32) { pixel32 = (uint32_t *) (image->data + y * image->stride); for (x = 0; x < image->width; x++, pixel32++) { a = (*pixel32 & 0xff000000) >> 24; alpha[i++] = a; if (a != 0xff) opaque = FALSE; } } else if (image->format == CAIRO_FORMAT_A8){ pixel8 = (uint8_t *) (image->data + y * image->stride); for (x = 0; x < image->width; x++, pixel8++) { a = *pixel8; alpha[i++] = a; if (a != 0xff) opaque = FALSE; } } else { /* image->format == CAIRO_FORMAT_A1 */ pixel8 = (uint8_t *) (image->data + y * image->stride); for (x = 0; x < (image->width + 7) / 8; x++, pixel8++) { a = *pixel8; a = CAIRO_BITSWAP8_IF_LITTLE_ENDIAN (a); alpha[i++] = a; if (a != 0xff) opaque = FALSE; } } } /* Bail out without emitting smask if it's all opaque. */ if (opaque) goto CLEANUP_ALPHA; status = _cairo_pdf_surface_open_stream (surface, NULL, TRUE, " /Type /XObject\n" " /Subtype /Image\n" " /Width %d\n" " /Height %d\n" " /ColorSpace /DeviceGray\n" " /BitsPerComponent %d\n", image->width, image->height, image->format == CAIRO_FORMAT_A1 ? 1 : 8); if (status) goto CLEANUP_ALPHA; *stream_ret = surface->pdf_stream.self; _cairo_output_stream_write (surface->output, alpha, alpha_size); status = _cairo_pdf_surface_close_stream (surface); CLEANUP_ALPHA: free (alpha); CLEANUP: return status; } /* Emit image data into the given surface, providing a resource that * can be used to reference the data in image_ret. */ static cairo_status_t _cairo_pdf_surface_emit_image (cairo_pdf_surface_t *surface, cairo_image_surface_t *image, cairo_pdf_resource_t *image_ret) { cairo_status_t status = CAIRO_STATUS_SUCCESS; char *rgb; unsigned long rgb_size; uint32_t *pixel; int i, x, y; cairo_pdf_resource_t smask = {0}; /* squelch bogus compiler warning */ cairo_bool_t need_smask; /* These are the only image formats we currently support, (which * makes things a lot simpler here). This is enforced through * _cairo_pdf_surface_analyze_operation which only accept source surfaces of * CONTENT_COLOR or CONTENT_COLOR_ALPHA. */ assert (image->format == CAIRO_FORMAT_RGB24 || image->format == CAIRO_FORMAT_ARGB32 || image->format == CAIRO_FORMAT_A8 || image->format == CAIRO_FORMAT_A1); rgb_size = image->height * image->width * 3; rgb = _cairo_malloc_abc (image->width, image->height, 3); if (rgb == NULL) { status = _cairo_error (CAIRO_STATUS_NO_MEMORY); goto CLEANUP; } i = 0; for (y = 0; y < image->height; y++) { pixel = (uint32_t *) (image->data + y * image->stride); for (x = 0; x < image->width; x++, pixel++) { /* XXX: We're un-premultiplying alpha here. My reading of the PDF * specification suggests that we should be able to avoid having * to do this by filling in the SMask's Matte dictionary * appropriately, but my attempts to do that so far have * failed. */ if (image->format == CAIRO_FORMAT_ARGB32) { uint8_t a; a = (*pixel & 0xff000000) >> 24; if (a == 0) { rgb[i++] = 0; rgb[i++] = 0; rgb[i++] = 0; } else { rgb[i++] = (((*pixel & 0xff0000) >> 16) * 255 + a / 2) / a; rgb[i++] = (((*pixel & 0x00ff00) >> 8) * 255 + a / 2) / a; rgb[i++] = (((*pixel & 0x0000ff) >> 0) * 255 + a / 2) / a; } } else if (image->format == CAIRO_FORMAT_RGB24) { rgb[i++] = (*pixel & 0x00ff0000) >> 16; rgb[i++] = (*pixel & 0x0000ff00) >> 8; rgb[i++] = (*pixel & 0x000000ff) >> 0; } else { rgb[i++] = 0; rgb[i++] = 0; rgb[i++] = 0; } } } need_smask = FALSE; if (image->format == CAIRO_FORMAT_ARGB32 || image->format == CAIRO_FORMAT_A8 || image->format == CAIRO_FORMAT_A1) { status = _cairo_pdf_surface_emit_smask (surface, image, &smask); if (status) goto CLEANUP_RGB; if (smask.id) need_smask = TRUE; } #define IMAGE_DICTIONARY " /Type /XObject\n" \ " /Subtype /Image\n" \ " /Width %d\n" \ " /Height %d\n" \ " /ColorSpace /DeviceRGB\n" \ " /BitsPerComponent 8\n" if (need_smask) status = _cairo_pdf_surface_open_stream (surface, NULL, TRUE, IMAGE_DICTIONARY " /SMask %d 0 R\n", image->width, image->height, smask.id); else status = _cairo_pdf_surface_open_stream (surface, NULL, TRUE, IMAGE_DICTIONARY, image->width, image->height); if (status) goto CLEANUP_RGB; #undef IMAGE_DICTIONARY *image_ret = surface->pdf_stream.self; _cairo_output_stream_write (surface->output, rgb, rgb_size); status = _cairo_pdf_surface_close_stream (surface); CLEANUP_RGB: free (rgb); CLEANUP: return status; } static cairo_status_t _cairo_pdf_surface_emit_image_surface (cairo_pdf_surface_t *surface, cairo_surface_pattern_t *pattern, cairo_pdf_resource_t *resource, int *width, int *height) { cairo_image_surface_t *image; void *image_extra; cairo_status_t status; status = _cairo_surface_acquire_source_image (pattern->surface, &image, &image_extra); if (status) goto BAIL; status = _cairo_pdf_surface_emit_image (surface, image, resource); if (status) goto BAIL; *width = image->width; *height = image->height; BAIL: _cairo_surface_release_source_image (pattern->surface, image, image_extra); return status; } static cairo_status_t _cairo_pdf_surface_emit_meta_surface (cairo_pdf_surface_t *surface, cairo_surface_t *meta_surface, cairo_pdf_resource_t *resource) { double old_width, old_height; cairo_paginated_mode_t old_paginated_mode; cairo_clip_t *old_clip; cairo_rectangle_int_t meta_extents; cairo_status_t status; int alpha = 0; status = _cairo_surface_get_extents (meta_surface, &meta_extents); if (status) return status; old_width = surface->width; old_height = surface->height; old_paginated_mode = surface->paginated_mode; old_clip = _cairo_surface_get_clip (&surface->base); _cairo_pdf_surface_set_size_internal (surface, meta_extents.width, meta_extents.height); /* Patterns are emitted after fallback images. The paginated mode * needs to be set to _RENDER while the meta surface is replayed * back to this surface. */ surface->paginated_mode = CAIRO_PAGINATED_MODE_RENDER; _cairo_pdf_group_resources_clear (&surface->resources); status = _cairo_pdf_surface_open_content_stream (surface, TRUE); if (status) return status; *resource = surface->content; if (cairo_surface_get_content (meta_surface) == CAIRO_CONTENT_COLOR) { status = _cairo_pdf_surface_add_alpha (surface, 1.0, &alpha); if (status) return status; _cairo_output_stream_printf (surface->output, "q /a%d gs 0 0 0 rg 0 0 %f %f re f Q\n", alpha, surface->width, surface->height); } status = _cairo_meta_surface_replay_region (meta_surface, &surface->base, CAIRO_META_REGION_NATIVE); assert (status != CAIRO_INT_STATUS_UNSUPPORTED); if (status) return status; status = _cairo_surface_set_clip (&surface->base, old_clip); if (status) return status; status = _cairo_pdf_surface_close_content_stream (surface); _cairo_pdf_surface_set_size_internal (surface, old_width, old_height); surface->paginated_mode = old_paginated_mode; return status; } static cairo_status_t _cairo_pdf_surface_emit_surface_pattern (cairo_pdf_surface_t *surface, cairo_pdf_pattern_t *pdf_pattern) { cairo_surface_pattern_t *pattern = (cairo_surface_pattern_t *) pdf_pattern->pattern; cairo_status_t status; cairo_pdf_resource_t pattern_resource = {0}; /* squelch bogus compiler warning */ cairo_matrix_t cairo_p2d, pdf_p2d; cairo_extend_t extend = cairo_pattern_get_extend (&pattern->base); double xstep, ystep; cairo_rectangle_int_t surface_extents; int pattern_width = 0; /* squelch bogus compiler warning */ int pattern_height = 0; /* squelch bogus compiler warning */ int bbox_x, bbox_y; char draw_surface[200]; if (_cairo_surface_is_meta (pattern->surface)) { cairo_surface_t *meta_surface = pattern->surface; cairo_rectangle_int_t pattern_extents; status = _cairo_pdf_surface_emit_meta_surface (surface, meta_surface, &pattern_resource); if (status) return status; status = _cairo_surface_get_extents (meta_surface, &pattern_extents); if (status) return status; pattern_width = pattern_extents.width; pattern_height = pattern_extents.height; } else { status = _cairo_pdf_surface_emit_image_surface (surface, pattern, &pattern_resource, &pattern_width, &pattern_height); if (status) return status; } status = _cairo_surface_get_extents (&surface->base, &surface_extents); if (status) return status; bbox_x = pattern_width; bbox_y = pattern_height; switch (extend) { /* We implement EXTEND_PAD like EXTEND_NONE for now */ case CAIRO_EXTEND_PAD: case CAIRO_EXTEND_NONE: { /* In PS/PDF, (as far as I can tell), all patterns are * repeating. So we support cairo's EXTEND_NONE semantics * by setting the repeat step size to a size large enough * to guarantee that no more than a single occurrence will * be visible. * * First, map the surface extents into pattern space (since * xstep and ystep are in pattern space). Then use an upper * bound on the length of the diagonal of the pattern image * and the surface as repeat size. This guarantees to never * repeat visibly. */ double x1 = 0.0, y1 = 0.0; double x2 = surface->width, y2 = surface->height; _cairo_matrix_transform_bounding_box (&pattern->base.matrix, &x1, &y1, &x2, &y2, NULL); /* Rather than computing precise bounds of the union, just * add the surface extents unconditionally. We only * required an answer that's large enough, we don't really * care if it's not as tight as possible.*/ xstep = ystep = ceil ((x2 - x1) + (y2 - y1) + pattern_width + pattern_height); } break; case CAIRO_EXTEND_REPEAT: xstep = pattern_width; ystep = pattern_height; break; case CAIRO_EXTEND_REFLECT: bbox_x = pattern_width*2; bbox_y = pattern_height*2; xstep = bbox_x; ystep = bbox_y; break; /* All the rest (if any) should have been analyzed away, so this * case should be unreachable. */ default: ASSERT_NOT_REACHED; xstep = 0; ystep = 0; } /* At this point, (that is, within the surface backend interface), * the pattern's matrix maps from cairo's device space to cairo's * pattern space, (both with their origin at the upper-left, and * cairo's pattern space of size width,height). * * Then, we must emit a PDF pattern object that maps from its own * pattern space, (which has a size that we establish in the BBox * dictionary entry), to the PDF page's *initial* space, (which * does not benefit from the Y-axis flipping matrix that we emit * on each page). So the PDF patterns matrix maps from a * (width,height) pattern space to a device space with the origin * in the lower-left corner. * * So to handle all of that, we start with an identity matrix for * the PDF pattern to device matrix. We translate it up by the * image height then flip it in the Y direction, (moving us from * the PDF origin to cairo's origin). We then multiply in the * inverse of the cairo pattern matrix, (since it maps from device * to pattern, while we're setting up pattern to device). Finally, * we translate back down by the image height and flip again to * end up at the lower-left origin that PDF expects. * * Additionally, within the stream that paints the pattern itself, * we are using a PDF image object that has a size of (1,1) so we * have to scale it up by the image width and height to fill our * pattern cell. */ cairo_p2d = pattern->base.matrix; status = cairo_matrix_invert (&cairo_p2d); /* cairo_pattern_set_matrix ensures the matrix is invertible */ assert (status == CAIRO_STATUS_SUCCESS); cairo_matrix_init_identity (&pdf_p2d); cairo_matrix_translate (&pdf_p2d, 0.0, surface_extents.height); cairo_matrix_scale (&pdf_p2d, 1.0, -1.0); cairo_matrix_multiply (&pdf_p2d, &cairo_p2d, &pdf_p2d); cairo_matrix_translate (&pdf_p2d, 0.0, pattern_height); cairo_matrix_scale (&pdf_p2d, 1.0, -1.0); _cairo_pdf_surface_update_object (surface, pdf_pattern->pattern_res); status = _cairo_pdf_surface_open_stream (surface, &pdf_pattern->pattern_res, FALSE, " /PatternType 1\n" " /BBox [0 0 %d %d]\n" " /XStep %f\n" " /YStep %f\n" " /TilingType 1\n" " /PaintType 1\n" " /Matrix [ %f %f %f %f %f %f ]\n" " /Resources << /XObject << /x%d %d 0 R >> >>\n", bbox_x, bbox_y, xstep, ystep, pdf_p2d.xx, pdf_p2d.yx, pdf_p2d.xy, pdf_p2d.yy, pdf_p2d.x0, pdf_p2d.y0, pattern_resource.id, pattern_resource.id); if (status) return status; if (_cairo_surface_is_meta (pattern->surface)) { snprintf(draw_surface, sizeof (draw_surface), "/x%d Do\n", pattern_resource.id); } else { snprintf(draw_surface, sizeof (draw_surface), "q %d 0 0 %d 0 0 cm /x%d Do Q", pattern_width, pattern_height, pattern_resource.id); } if (extend == CAIRO_EXTEND_REFLECT) { _cairo_output_stream_printf (surface->output, "q 0 0 %d %d re W n %s Q\n" "q -1 0 0 1 %d 0 cm 0 0 %d %d re W n %s Q\n" "q 1 0 0 -1 0 %d cm 0 0 %d %d re W n %s Q\n" "q -1 0 0 -1 %d %d cm 0 0 %d %d re W n %s Q\n", pattern_width, pattern_height, draw_surface, pattern_width*2, pattern_width, pattern_height, draw_surface, pattern_height*2, pattern_width, pattern_height, draw_surface, pattern_width*2, pattern_height*2, pattern_width, pattern_height, draw_surface); } else { _cairo_output_stream_printf (surface->output, " %s \n", draw_surface); } status = _cairo_pdf_surface_close_stream (surface); if (status) return status; return _cairo_output_stream_get_status (surface->output); } typedef struct _cairo_pdf_color_stop { double offset; double color[4]; cairo_pdf_resource_t resource; } cairo_pdf_color_stop_t; static cairo_status_t cairo_pdf_surface_emit_rgb_linear_function (cairo_pdf_surface_t *surface, cairo_pdf_color_stop_t *stop1, cairo_pdf_color_stop_t *stop2, cairo_pdf_resource_t *function) { int num_elems, i; cairo_pdf_rgb_linear_function_t elem; cairo_pdf_resource_t res; cairo_status_t status; num_elems = _cairo_array_num_elements (&surface->rgb_linear_functions); for (i = 0; i < num_elems; i++) { _cairo_array_copy_element (&surface->rgb_linear_functions, i, &elem); if (memcmp (&elem.color1[0], &stop1->color[0], sizeof (double)*3) != 0) continue; if (memcmp (&elem.color2[0], &stop2->color[0], sizeof (double)*3) != 0) continue; *function = elem.resource; return CAIRO_STATUS_SUCCESS; } res = _cairo_pdf_surface_new_object (surface); if (res.id == 0) return _cairo_error (CAIRO_STATUS_NO_MEMORY); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /FunctionType 2\n" " /Domain [ 0 1 ]\n" " /C0 [ %f %f %f ]\n" " /C1 [ %f %f %f ]\n" " /N 1\n" ">>\n" "endobj\n", res.id, stop1->color[0], stop1->color[1], stop1->color[2], stop2->color[0], stop2->color[1], stop2->color[2]); elem.resource = res; memcpy (&elem.color1[0], &stop1->color[0], sizeof (double)*3); memcpy (&elem.color2[0], &stop2->color[0], sizeof (double)*3); status = _cairo_array_append (&surface->rgb_linear_functions, &elem); *function = res; return status; } static cairo_status_t cairo_pdf_surface_emit_alpha_linear_function (cairo_pdf_surface_t *surface, cairo_pdf_color_stop_t *stop1, cairo_pdf_color_stop_t *stop2, cairo_pdf_resource_t *function) { int num_elems, i; cairo_pdf_alpha_linear_function_t elem; cairo_pdf_resource_t res; cairo_status_t status; num_elems = _cairo_array_num_elements (&surface->alpha_linear_functions); for (i = 0; i < num_elems; i++) { _cairo_array_copy_element (&surface->alpha_linear_functions, i, &elem); if (elem.alpha1 != stop1->color[3]) continue; if (elem.alpha2 != stop2->color[3]) continue; *function = elem.resource; return CAIRO_STATUS_SUCCESS; } res = _cairo_pdf_surface_new_object (surface); if (res.id == 0) return _cairo_error (CAIRO_STATUS_NO_MEMORY); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /FunctionType 2\n" " /Domain [ 0 1 ]\n" " /C0 [ %f ]\n" " /C1 [ %f ]\n" " /N 1\n" ">>\n" "endobj\n", res.id, stop1->color[3], stop2->color[3]); elem.resource = res; elem.alpha1 = stop1->color[3]; elem.alpha2 = stop2->color[3]; status = _cairo_array_append (&surface->alpha_linear_functions, &elem); *function = res; return status; } static cairo_status_t _cairo_pdf_surface_emit_stitched_colorgradient (cairo_pdf_surface_t *surface, unsigned int n_stops, cairo_pdf_color_stop_t *stops, cairo_bool_t is_alpha, cairo_pdf_resource_t *function) { cairo_pdf_resource_t res; unsigned int i; cairo_status_t status; /* emit linear gradients between pairs of subsequent stops... */ for (i = 0; i < n_stops-1; i++) { if (is_alpha) { status = cairo_pdf_surface_emit_alpha_linear_function (surface, &stops[i], &stops[i+1], &stops[i].resource); if (status) return status; } else { status = cairo_pdf_surface_emit_rgb_linear_function (surface, &stops[i], &stops[i+1], &stops[i].resource); if (status) return status; } } /* ... and stitch them together */ res = _cairo_pdf_surface_new_object (surface); if (res.id == 0) return _cairo_error (CAIRO_STATUS_NO_MEMORY); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /FunctionType 3\n" " /Domain [ %f %f ]\n", res.id, stops[0].offset, stops[n_stops - 1].offset); _cairo_output_stream_printf (surface->output, " /Functions [ "); for (i = 0; i < n_stops-1; i++) _cairo_output_stream_printf (surface->output, "%d 0 R ", stops[i].resource.id); _cairo_output_stream_printf (surface->output, "]\n"); _cairo_output_stream_printf (surface->output, " /Bounds [ "); for (i = 1; i < n_stops-1; i++) _cairo_output_stream_printf (surface->output, "%f ", stops[i].offset); _cairo_output_stream_printf (surface->output, "]\n"); _cairo_output_stream_printf (surface->output, " /Encode [ "); for (i = 1; i < n_stops; i++) _cairo_output_stream_printf (surface->output, "0 1 "); _cairo_output_stream_printf (surface->output, "]\n"); _cairo_output_stream_printf (surface->output, ">>\n" "endobj\n"); *function = res; return _cairo_output_stream_get_status (surface->output); } static void calc_gradient_color (cairo_pdf_color_stop_t *new_stop, cairo_pdf_color_stop_t *stop1, cairo_pdf_color_stop_t *stop2) { int i; double offset = stop1->offset / (stop1->offset + 1.0 - stop2->offset); for (i = 0; i < 4; i++) new_stop->color[i] = stop1->color[i] + offset*(stop2->color[i] - stop1->color[i]); } #define COLOR_STOP_EPSILON 1e-6 static cairo_status_t _cairo_pdf_surface_emit_pattern_stops (cairo_pdf_surface_t *surface, cairo_gradient_pattern_t *pattern, cairo_pdf_resource_t *color_function, cairo_pdf_resource_t *alpha_function) { cairo_pdf_color_stop_t *allstops, *stops; unsigned int n_stops; unsigned int i; cairo_bool_t emit_alpha = FALSE; cairo_status_t status; color_function->id = 0; alpha_function->id = 0; allstops = _cairo_malloc_ab ((pattern->n_stops + 2), sizeof (cairo_pdf_color_stop_t)); if (allstops == NULL) return _cairo_error (CAIRO_STATUS_NO_MEMORY); stops = &allstops[1]; n_stops = pattern->n_stops; for (i = 0; i < n_stops; i++) { stops[i].color[0] = pattern->stops[i].color.red; stops[i].color[1] = pattern->stops[i].color.green; stops[i].color[2] = pattern->stops[i].color.blue; stops[i].color[3] = pattern->stops[i].color.alpha; if (!CAIRO_ALPHA_IS_OPAQUE (stops[i].color[3])) emit_alpha = TRUE; stops[i].offset = pattern->stops[i].offset; } if (pattern->base.extend == CAIRO_EXTEND_REPEAT || pattern->base.extend == CAIRO_EXTEND_REFLECT) { if (stops[0].offset > COLOR_STOP_EPSILON) { if (pattern->base.extend == CAIRO_EXTEND_REFLECT) memcpy (allstops, stops, sizeof (cairo_pdf_color_stop_t)); else calc_gradient_color (&allstops[0], &stops[0], &stops[n_stops-1]); stops = allstops; n_stops++; } stops[0].offset = 0.0; if (stops[n_stops-1].offset < 1.0 - COLOR_STOP_EPSILON) { if (pattern->base.extend == CAIRO_EXTEND_REFLECT) { memcpy (&stops[n_stops], &stops[n_stops - 1], sizeof (cairo_pdf_color_stop_t)); } else { calc_gradient_color (&stops[n_stops], &stops[0], &stops[n_stops-1]); } n_stops++; } stops[n_stops-1].offset = 1.0; } if (n_stops == 2) { /* no need for stitched function */ status = cairo_pdf_surface_emit_rgb_linear_function (surface, &stops[0], &stops[1], color_function); if (status) goto BAIL; if (emit_alpha) { status = cairo_pdf_surface_emit_alpha_linear_function (surface, &stops[0], &stops[1], alpha_function); if (status) goto BAIL; } } else { /* multiple stops: stitch. XXX possible optimization: regularly spaced * stops do not require stitching. XXX */ status = _cairo_pdf_surface_emit_stitched_colorgradient (surface, n_stops, stops, FALSE, color_function); if (status) goto BAIL; if (emit_alpha) { status = _cairo_pdf_surface_emit_stitched_colorgradient (surface, n_stops, stops, TRUE, alpha_function); if (status) goto BAIL; } } BAIL: free (allstops); return status; } static cairo_status_t _cairo_pdf_surface_emit_repeating_function (cairo_pdf_surface_t *surface, cairo_gradient_pattern_t *pattern, cairo_pdf_resource_t *function, int begin, int end) { cairo_pdf_resource_t res; int i; res = _cairo_pdf_surface_new_object (surface); if (res.id == 0) return _cairo_error (CAIRO_STATUS_NO_MEMORY); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /FunctionType 3\n" " /Domain [ %d %d ]\n", res.id, begin, end); _cairo_output_stream_printf (surface->output, " /Functions [ "); for (i = begin; i < end; i++) _cairo_output_stream_printf (surface->output, "%d 0 R ", function->id); _cairo_output_stream_printf (surface->output, "]\n"); _cairo_output_stream_printf (surface->output, " /Bounds [ "); for (i = begin + 1; i < end; i++) _cairo_output_stream_printf (surface->output, "%d ", i); _cairo_output_stream_printf (surface->output, "]\n"); _cairo_output_stream_printf (surface->output, " /Encode [ "); for (i = begin; i < end; i++) { if ((i % 2) && pattern->base.extend == CAIRO_EXTEND_REFLECT) { _cairo_output_stream_printf (surface->output, "1 0 "); } else { _cairo_output_stream_printf (surface->output, "0 1 "); } } _cairo_output_stream_printf (surface->output, "]\n"); _cairo_output_stream_printf (surface->output, ">>\n" "endobj\n"); *function = res; return _cairo_output_stream_get_status (surface->output); } static cairo_status_t cairo_pdf_surface_emit_transparency_group (cairo_pdf_surface_t *surface, cairo_pdf_resource_t gstate_resource, cairo_pdf_resource_t gradient_mask) { cairo_pdf_resource_t smask_resource; cairo_status_t status; status = _cairo_pdf_surface_open_stream (surface, NULL, surface->compress_content, " /Type /XObject\n" " /Subtype /Form\n" " /FormType 1\n" " /BBox [ 0 0 %f %f ]\n" " /Resources\n" " << /ExtGState\n" " << /a0 << /ca 1 /CA 1 >>" " >>\n" " /Pattern\n" " << /p%d %d 0 R >>\n" " >>\n" " /Group\n" " << /Type /Group\n" " /S /Transparency\n" " /CS /DeviceGray\n" " >>\n", surface->width, surface->height, gradient_mask.id, gradient_mask.id); if (status) return status; _cairo_output_stream_printf (surface->output, "q\n" "/a0 gs\n" "/Pattern cs /p%d scn\n" "0 0 %f %f re\n" "f\n" "Q\n", gradient_mask.id, surface->width, surface->height); status = _cairo_pdf_surface_close_stream (surface); if (status) return status; smask_resource = _cairo_pdf_surface_new_object (surface); if (smask_resource.id == 0) return _cairo_error (CAIRO_STATUS_NO_MEMORY); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Type /Mask\n" " /S /Luminosity\n" " /G %d 0 R\n" ">>\n" "endobj\n", smask_resource.id, surface->pdf_stream.self.id); /* Create GState which uses the transparency group as an SMask. */ _cairo_pdf_surface_update_object (surface, gstate_resource); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Type /ExtGState\n" " /SMask %d 0 R\n" " /ca 1\n" " /CA 1\n" " /AIS false\n" ">>\n" "endobj\n", gstate_resource.id, smask_resource.id); return _cairo_output_stream_get_status (surface->output); } static cairo_status_t _cairo_pdf_surface_emit_linear_pattern (cairo_pdf_surface_t *surface, cairo_pdf_pattern_t *pdf_pattern) { cairo_linear_pattern_t *pattern = (cairo_linear_pattern_t *) pdf_pattern->pattern; cairo_pdf_resource_t color_function, alpha_function; double x1, y1, x2, y2; double _x1, _y1, _x2, _y2; cairo_matrix_t pat_to_pdf; cairo_extend_t extend; cairo_status_t status; cairo_gradient_pattern_t *gradient = &pattern->base; double first_stop, last_stop; int repeat_begin = 0, repeat_end = 1; assert (pattern->base.n_stops != 0); extend = cairo_pattern_get_extend (pdf_pattern->pattern); pat_to_pdf = pattern->base.base.matrix; status = cairo_matrix_invert (&pat_to_pdf); /* cairo_pattern_set_matrix ensures the matrix is invertible */ assert (status == CAIRO_STATUS_SUCCESS); cairo_matrix_multiply (&pat_to_pdf, &pat_to_pdf, &surface->cairo_to_pdf); first_stop = gradient->stops[0].offset; last_stop = gradient->stops[gradient->n_stops - 1].offset; if (pattern->base.base.extend == CAIRO_EXTEND_REPEAT || pattern->base.base.extend == CAIRO_EXTEND_REFLECT) { double dx, dy; int x_rep = 0, y_rep = 0; x1 = _cairo_fixed_to_double (pattern->p1.x); y1 = _cairo_fixed_to_double (pattern->p1.y); cairo_matrix_transform_point (&pat_to_pdf, &x1, &y1); x2 = _cairo_fixed_to_double (pattern->p2.x); y2 = _cairo_fixed_to_double (pattern->p2.y); cairo_matrix_transform_point (&pat_to_pdf, &x2, &y2); dx = fabs (x2 - x1); dy = fabs (y2 - y1); if (dx > 1e-6) x_rep = (int) ceil (surface->width/dx); if (dy > 1e-6) y_rep = (int) ceil (surface->height/dy); repeat_end = MAX (x_rep, y_rep); repeat_begin = -repeat_end; first_stop = repeat_begin; last_stop = repeat_end; } /* PDF requires the first and last stop to be the same as the line * coordinates. For repeating patterns this moves the line * coordinates out to the begin/end of the repeating function. For * non repeating patterns this may move the line coordinates in if * there are not stops at offset 0 and 1. */ x1 = _cairo_fixed_to_double (pattern->p1.x); y1 = _cairo_fixed_to_double (pattern->p1.y); x2 = _cairo_fixed_to_double (pattern->p2.x); y2 = _cairo_fixed_to_double (pattern->p2.y); _x1 = x1 + (x2 - x1)*first_stop; _y1 = y1 + (y2 - y1)*first_stop; _x2 = x1 + (x2 - x1)*last_stop; _y2 = y1 + (y2 - y1)*last_stop; x1 = _x1; x2 = _x2; y1 = _y1; y2 = _y2; /* For EXTEND_NONE and EXTEND_PAD if there are only two stops a * Type 2 function is used by itself without a stitching * function. Type 2 functions always have the domain [0 1] */ if ((pattern->base.base.extend == CAIRO_EXTEND_NONE || pattern->base.base.extend == CAIRO_EXTEND_PAD) && gradient->n_stops == 2) { first_stop = 0.0; last_stop = 1.0; } status = _cairo_pdf_surface_emit_pattern_stops (surface, &pattern->base, &color_function, &alpha_function); if (status) return status; if (pattern->base.base.extend == CAIRO_EXTEND_REPEAT || pattern->base.base.extend == CAIRO_EXTEND_REFLECT) { status = _cairo_pdf_surface_emit_repeating_function (surface, &pattern->base, &color_function, repeat_begin, repeat_end); if (status) return status; if (alpha_function.id != 0) { status = _cairo_pdf_surface_emit_repeating_function (surface, &pattern->base, &alpha_function, repeat_begin, repeat_end); if (status) return status; } } _cairo_pdf_surface_update_object (surface, pdf_pattern->pattern_res); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Type /Pattern\n" " /PatternType 2\n" " /Matrix [ %f %f %f %f %f %f ]\n" " /Shading\n" " << /ShadingType 2\n" " /ColorSpace /DeviceRGB\n" " /Coords [ %f %f %f %f ]\n" " /Domain [ %f %f ]\n" " /Function %d 0 R\n", pdf_pattern->pattern_res.id, pat_to_pdf.xx, pat_to_pdf.yx, pat_to_pdf.xy, pat_to_pdf.yy, pat_to_pdf.x0, pat_to_pdf.y0, x1, y1, x2, y2, first_stop, last_stop, color_function.id); if (extend == CAIRO_EXTEND_PAD) { _cairo_output_stream_printf (surface->output, " /Extend [ true true ]\n"); } else { _cairo_output_stream_printf (surface->output, " /Extend [ false false ]\n"); } _cairo_output_stream_printf (surface->output, " >>\n" ">>\n" "endobj\n"); if (alpha_function.id != 0) { cairo_pdf_resource_t mask_resource; assert (pdf_pattern->gstate_res.id != 0); /* Create pattern for SMask. */ mask_resource = _cairo_pdf_surface_new_object (surface); if (mask_resource.id == 0) return _cairo_error (CAIRO_STATUS_NO_MEMORY); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Type /Pattern\n" " /PatternType 2\n" " /Matrix [ %f %f %f %f %f %f ]\n" " /Shading\n" " << /ShadingType 2\n" " /ColorSpace /DeviceGray\n" " /Coords [ %f %f %f %f ]\n" " /Domain [ %f %f ]\n" " /Function %d 0 R\n", mask_resource.id, pat_to_pdf.xx, pat_to_pdf.yx, pat_to_pdf.xy, pat_to_pdf.yy, pat_to_pdf.x0, pat_to_pdf.y0, x1, y1, x2, y2, first_stop, last_stop, alpha_function.id); if (extend == CAIRO_EXTEND_PAD) { _cairo_output_stream_printf (surface->output, " /Extend [ true true ]\n"); } else { _cairo_output_stream_printf (surface->output, " /Extend [ false false ]\n"); } _cairo_output_stream_printf (surface->output, " >>\n" ">>\n" "endobj\n"); status = _cairo_pdf_surface_add_pattern (surface, mask_resource); if (status) return status; status = cairo_pdf_surface_emit_transparency_group (surface, pdf_pattern->gstate_res, mask_resource); if (status) return status; } return _cairo_output_stream_get_status (surface->output); } static cairo_status_t _cairo_pdf_surface_emit_radial_pattern (cairo_pdf_surface_t *surface, cairo_pdf_pattern_t *pdf_pattern) { cairo_pdf_resource_t color_function, alpha_function; double x1, y1, x2, y2, r1, r2; cairo_matrix_t pat_to_pdf; cairo_extend_t extend; cairo_status_t status; cairo_radial_pattern_t *pattern = (cairo_radial_pattern_t *) pdf_pattern->pattern; assert (pattern->base.n_stops != 0); extend = cairo_pattern_get_extend (pdf_pattern->pattern); status = _cairo_pdf_surface_emit_pattern_stops (surface, &pattern->base, &color_function, &alpha_function); if (status) return status; pat_to_pdf = pattern->base.base.matrix; status = cairo_matrix_invert (&pat_to_pdf); /* cairo_pattern_set_matrix ensures the matrix is invertible */ assert (status == CAIRO_STATUS_SUCCESS); cairo_matrix_multiply (&pat_to_pdf, &pat_to_pdf, &surface->cairo_to_pdf); x1 = _cairo_fixed_to_double (pattern->c1.x); y1 = _cairo_fixed_to_double (pattern->c1.y); r1 = _cairo_fixed_to_double (pattern->r1); x2 = _cairo_fixed_to_double (pattern->c2.x); y2 = _cairo_fixed_to_double (pattern->c2.y); r2 = _cairo_fixed_to_double (pattern->r2); _cairo_pdf_surface_update_object (surface, pdf_pattern->pattern_res); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Type /Pattern\n" " /PatternType 2\n" " /Matrix [ %f %f %f %f %f %f ]\n" " /Shading\n" " << /ShadingType 3\n" " /ColorSpace /DeviceRGB\n" " /Coords [ %f %f %f %f %f %f ]\n" " /Function %d 0 R\n", pdf_pattern->pattern_res.id, pat_to_pdf.xx, pat_to_pdf.yx, pat_to_pdf.xy, pat_to_pdf.yy, pat_to_pdf.x0, pat_to_pdf.y0, x1, y1, r1, x2, y2, r2, color_function.id); if (extend == CAIRO_EXTEND_PAD) { _cairo_output_stream_printf (surface->output, " /Extend [ true true ]\n"); } else { _cairo_output_stream_printf (surface->output, " /Extend [ false false ]\n"); } _cairo_output_stream_printf (surface->output, " >>\n" ">>\n" "endobj\n"); if (alpha_function.id != 0) { cairo_pdf_resource_t mask_resource; assert (pdf_pattern->gstate_res.id != 0); /* Create pattern for SMask. */ mask_resource = _cairo_pdf_surface_new_object (surface); if (mask_resource.id == 0) return _cairo_error (CAIRO_STATUS_NO_MEMORY); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Type /Pattern\n" " /PatternType 2\n" " /Matrix [ %f %f %f %f %f %f ]\n" " /Shading\n" " << /ShadingType 3\n" " /ColorSpace /DeviceGray\n" " /Coords [ %f %f %f %f %f %f ]\n" " /Function %d 0 R\n", mask_resource.id, pat_to_pdf.xx, pat_to_pdf.yx, pat_to_pdf.xy, pat_to_pdf.yy, pat_to_pdf.x0, pat_to_pdf.y0, x1, y1, r1, x2, y2, r2, alpha_function.id); if (extend == CAIRO_EXTEND_PAD) { _cairo_output_stream_printf (surface->output, " /Extend [ true true ]\n"); } else { _cairo_output_stream_printf (surface->output, " /Extend [ false false ]\n"); } _cairo_output_stream_printf (surface->output, " >>\n" ">>\n" "endobj\n"); status = cairo_pdf_surface_emit_transparency_group (surface, pdf_pattern->gstate_res, mask_resource); if (status) return status; } return _cairo_output_stream_get_status (surface->output); } static cairo_status_t _cairo_pdf_surface_emit_pattern (cairo_pdf_surface_t *surface, cairo_pdf_pattern_t *pdf_pattern) { double old_width, old_height; cairo_status_t status; old_width = surface->width; old_height = surface->height; _cairo_pdf_surface_set_size_internal (surface, pdf_pattern->width, pdf_pattern->height); switch (pdf_pattern->pattern->type) { case CAIRO_PATTERN_TYPE_SOLID: ASSERT_NOT_REACHED; status = _cairo_error (CAIRO_STATUS_PATTERN_TYPE_MISMATCH); break; case CAIRO_PATTERN_TYPE_SURFACE: status = _cairo_pdf_surface_emit_surface_pattern (surface, pdf_pattern); break; case CAIRO_PATTERN_TYPE_LINEAR: status = _cairo_pdf_surface_emit_linear_pattern (surface, pdf_pattern); break; case CAIRO_PATTERN_TYPE_RADIAL: status = _cairo_pdf_surface_emit_radial_pattern (surface, pdf_pattern); break; default: ASSERT_NOT_REACHED; status = _cairo_error (CAIRO_STATUS_PATTERN_TYPE_MISMATCH); break; } _cairo_pdf_surface_set_size_internal (surface, old_width, old_height); return status; } static cairo_status_t _cairo_pdf_surface_select_pattern (cairo_pdf_surface_t *surface, cairo_pattern_t *pattern, cairo_pdf_resource_t pattern_res, cairo_bool_t is_stroke) { cairo_status_t status; int alpha; cairo_bool_t is_solid_color = FALSE; cairo_color_t *solid_color; if (pattern->type == CAIRO_PATTERN_TYPE_SOLID) { cairo_solid_pattern_t *solid = (cairo_solid_pattern_t *) pattern; is_solid_color = TRUE; solid_color = &solid->color; } if (pattern->type == CAIRO_PATTERN_TYPE_LINEAR || pattern->type == CAIRO_PATTERN_TYPE_RADIAL) { cairo_gradient_pattern_t *gradient = (cairo_gradient_pattern_t *) pattern; if (gradient->n_stops == 1) { is_solid_color = TRUE; solid_color = &gradient->stops[0].color; } } if (is_solid_color) { if (surface->current_pattern_is_solid_color == FALSE || surface->current_color_red != solid_color->red || surface->current_color_green != solid_color->green || surface->current_color_blue != solid_color->blue || surface->current_color_is_stroke != is_stroke) { status = _cairo_pdf_operators_flush (&surface->pdf_operators); if (status) return status; _cairo_output_stream_printf (surface->output, "%f %f %f ", solid_color->red, solid_color->green, solid_color->blue); if (is_stroke) _cairo_output_stream_printf (surface->output, "RG "); else _cairo_output_stream_printf (surface->output, "rg "); surface->current_color_red = solid_color->red; surface->current_color_green = solid_color->green; surface->current_color_blue = solid_color->blue; surface->current_color_is_stroke = is_stroke; } if (surface->current_pattern_is_solid_color == FALSE || surface->current_color_alpha != solid_color->alpha) { status = _cairo_pdf_surface_add_alpha (surface, solid_color->alpha, &alpha); if (status) return status; status = _cairo_pdf_operators_flush (&surface->pdf_operators); if (status) return status; _cairo_output_stream_printf (surface->output, "/a%d gs\n", alpha); surface->current_color_alpha = solid_color->alpha; } surface->current_pattern_is_solid_color = TRUE; } else { status = _cairo_pdf_surface_add_alpha (surface, 1.0, &alpha); if (status) return status; status = _cairo_pdf_surface_add_pattern (surface, pattern_res); if (status) return status; status = _cairo_pdf_operators_flush (&surface->pdf_operators); if (status) return status; /* fill-stroke calls select_pattern twice. Don't save if the * gstate is already saved. */ if (!surface->select_pattern_gstate_saved) _cairo_output_stream_printf (surface->output, "q "); if (is_stroke) { _cairo_output_stream_printf (surface->output, "/Pattern CS /p%d SCN ", pattern_res.id); } else { _cairo_output_stream_printf (surface->output, "/Pattern cs /p%d scn ", pattern_res.id); } _cairo_output_stream_printf (surface->output, "/a%d gs\n", alpha); surface->select_pattern_gstate_saved = TRUE; surface->current_pattern_is_solid_color = FALSE; } return _cairo_output_stream_get_status (surface->output); } static cairo_int_status_t _cairo_pdf_surface_unselect_pattern (cairo_pdf_surface_t *surface) { cairo_int_status_t status; if (surface->select_pattern_gstate_saved) { status = _cairo_pdf_operators_flush (&surface->pdf_operators); if (status) return status; _cairo_output_stream_printf (surface->output, "Q\n"); _cairo_pdf_operators_reset (&surface->pdf_operators); } surface->select_pattern_gstate_saved = FALSE; return CAIRO_STATUS_SUCCESS; } static cairo_int_status_t _cairo_pdf_surface_show_page (void *abstract_surface) { cairo_pdf_surface_t *surface = abstract_surface; cairo_int_status_t status; status = _cairo_pdf_surface_close_content_stream (surface); if (status) return status; status = _cairo_pdf_surface_write_page (surface); if (status) return status; _cairo_pdf_surface_clear (surface); return CAIRO_STATUS_SUCCESS; } static cairo_int_status_t _cairo_pdf_surface_get_extents (void *abstract_surface, cairo_rectangle_int_t *rectangle) { cairo_pdf_surface_t *surface = abstract_surface; rectangle->x = 0; rectangle->y = 0; /* XXX: The conversion to integers here is pretty bogus, (not to * mention the arbitrary limitation of width to a short(!). We * may need to come up with a better interface for get_size. */ rectangle->width = (int) ceil (surface->width); rectangle->height = (int) ceil (surface->height); return CAIRO_STATUS_SUCCESS; } static cairo_int_status_t _cairo_pdf_surface_intersect_clip_path (void *abstract_surface, cairo_path_fixed_t *path, cairo_fill_rule_t fill_rule, double tolerance, cairo_antialias_t antialias) { cairo_pdf_surface_t *surface = abstract_surface; cairo_int_status_t status; if (path == NULL) { status = _cairo_pdf_operators_flush (&surface->pdf_operators); if (status) return status; _cairo_output_stream_printf (surface->output, "Q q\n"); surface->current_pattern_is_solid_color = FALSE; _cairo_pdf_operators_reset (&surface->pdf_operators); return CAIRO_STATUS_SUCCESS; } return _cairo_pdf_operators_clip (&surface->pdf_operators, path, fill_rule); } static void _cairo_pdf_surface_get_font_options (void *abstract_surface, cairo_font_options_t *options) { _cairo_font_options_init_default (options); cairo_font_options_set_hint_style (options, CAIRO_HINT_STYLE_NONE); cairo_font_options_set_hint_metrics (options, CAIRO_HINT_METRICS_OFF); cairo_font_options_set_antialias (options, CAIRO_ANTIALIAS_GRAY); } static cairo_pdf_resource_t _cairo_pdf_surface_write_info (cairo_pdf_surface_t *surface) { cairo_pdf_resource_t info; info = _cairo_pdf_surface_new_object (surface); if (info.id == 0) return info; _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Creator (cairo %s (http://cairographics.org))\n" " /Producer (cairo %s (http://cairographics.org))\n" ">>\n" "endobj\n", info.id, cairo_version_string (), cairo_version_string ()); return info; } static void _cairo_pdf_surface_write_pages (cairo_pdf_surface_t *surface) { cairo_pdf_resource_t page; int num_pages, i; _cairo_pdf_surface_update_object (surface, surface->pages_resource); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Type /Pages\n" " /Kids [ ", surface->pages_resource.id); num_pages = _cairo_array_num_elements (&surface->pages); for (i = 0; i < num_pages; i++) { _cairo_array_copy_element (&surface->pages, i, &page); _cairo_output_stream_printf (surface->output, "%d 0 R ", page.id); } _cairo_output_stream_printf (surface->output, "]\n"); _cairo_output_stream_printf (surface->output, " /Count %d\n", num_pages); /* TODO: Figure out which other defaults to be inherited by /Page * objects. */ _cairo_output_stream_printf (surface->output, ">>\n" "endobj\n"); } static cairo_status_t _cairo_pdf_surface_emit_unicode_for_glyph (cairo_pdf_surface_t *surface, const char *utf8) { uint16_t *utf16 = NULL; int utf16_len = 0; cairo_status_t status; int i; if (utf8 && *utf8) { status = _cairo_utf8_to_utf16 (utf8, -1, &utf16, &utf16_len); if (status) return status; } _cairo_output_stream_printf (surface->output, "<"); if (utf16 == NULL || utf16_len == 0) { /* According to the "ToUnicode Mapping File Tutorial" * http://www.adobe.com/devnet/acrobat/pdfs/5411.ToUnicode.pdf * * Glyphs that do not map to a Unicode code point must be * mapped to 0xfffd "REPLACEMENT CHARACTER". */ _cairo_output_stream_printf (surface->output, "fffd"); } else { for (i = 0; i < utf16_len; i++) _cairo_output_stream_printf (surface->output, "%04x", (int) (utf16[i])); } _cairo_output_stream_printf (surface->output, ">"); if (utf16) free (utf16); return CAIRO_STATUS_SUCCESS; } static cairo_int_status_t _cairo_pdf_surface_emit_to_unicode_stream (cairo_pdf_surface_t *surface, cairo_scaled_font_subset_t *font_subset, cairo_bool_t is_composite, cairo_pdf_resource_t *stream) { unsigned int i, num_bfchar; cairo_int_status_t status; stream->id = 0; status = _cairo_pdf_surface_open_stream (surface, NULL, surface->compress_content, NULL); if (status) return status; _cairo_output_stream_printf (surface->output, "/CIDInit /ProcSet findresource begin\n" "12 dict begin\n" "begincmap\n" "/CIDSystemInfo\n" "<< /Registry (Adobe)\n" " /Ordering (UCS)\n" " /Supplement 0\n" ">> def\n" "/CMapName /Adobe-Identity-UCS def\n" "/CMapType 2 def\n" "1 begincodespacerange\n"); if (is_composite) { _cairo_output_stream_printf (surface->output, "<0000> \n"); } else { _cairo_output_stream_printf (surface->output, "<00> \n"); } _cairo_output_stream_printf (surface->output, "endcodespacerange\n"); num_bfchar = font_subset->num_glyphs - 1; /* The CMap specification has a limit of 100 characters per beginbfchar operator */ _cairo_output_stream_printf (surface->output, "%d beginbfchar\n", num_bfchar > 100 ? 100 : num_bfchar); for (i = 0; i < num_bfchar; i++) { if (i != 0 && i % 100 == 0) { _cairo_output_stream_printf (surface->output, "endbfchar\n" "%d beginbfchar\n", num_bfchar - i > 100 ? 100 : num_bfchar - i); } if (is_composite) { _cairo_output_stream_printf (surface->output, "<%04x> ", i + 1); } else { _cairo_output_stream_printf (surface->output, "<%02x> ", i + 1); } _cairo_pdf_surface_emit_unicode_for_glyph (surface, font_subset->utf8[i + 1]); _cairo_output_stream_printf (surface->output, "\n"); } _cairo_output_stream_printf (surface->output, "endbfchar\n"); _cairo_output_stream_printf (surface->output, "endcmap\n" "CMapName currentdict /CMap defineresource pop\n" "end\n" "end\n"); *stream = surface->pdf_stream.self; return _cairo_pdf_surface_close_stream (surface); } static cairo_status_t _cairo_pdf_surface_emit_cff_font (cairo_pdf_surface_t *surface, cairo_scaled_font_subset_t *font_subset, cairo_cff_subset_t *subset) { cairo_pdf_resource_t stream, descriptor, cidfont_dict; cairo_pdf_resource_t subset_resource, to_unicode_stream; cairo_pdf_font_t font; unsigned int i; cairo_status_t status; subset_resource = _cairo_pdf_surface_get_font_resource (surface, font_subset->font_id, font_subset->subset_id); if (subset_resource.id == 0) return CAIRO_STATUS_SUCCESS; status = _cairo_pdf_surface_open_stream (surface, NULL, TRUE, " /Subtype /CIDFontType0C\n"); if (status) return status; stream = surface->pdf_stream.self; _cairo_output_stream_write (surface->output, subset->data, subset->data_length); status = _cairo_pdf_surface_close_stream (surface); if (status) return status; status = _cairo_pdf_surface_emit_to_unicode_stream (surface, font_subset, TRUE, &to_unicode_stream); if (status && status != CAIRO_INT_STATUS_UNSUPPORTED) return status; descriptor = _cairo_pdf_surface_new_object (surface); if (descriptor.id == 0) return _cairo_error (CAIRO_STATUS_NO_MEMORY); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Type /FontDescriptor\n" " /FontName /%s\n" " /Flags 4\n" " /FontBBox [ %ld %ld %ld %ld ]\n" " /ItalicAngle 0\n" " /Ascent %ld\n" " /Descent %ld\n" " /CapHeight 500\n" " /StemV 80\n" " /StemH 80\n" " /FontFile3 %u 0 R\n" ">>\n" "endobj\n", descriptor.id, subset->base_font, subset->x_min, subset->y_min, subset->x_max, subset->y_max, subset->ascent, subset->descent, stream.id); cidfont_dict = _cairo_pdf_surface_new_object (surface); if (cidfont_dict.id == 0) return _cairo_error (CAIRO_STATUS_NO_MEMORY); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Type /Font\n" " /Subtype /CIDFontType0\n" " /BaseFont /%s\n" " /CIDSystemInfo\n" " << /Registry (Adobe)\n" " /Ordering (Identity)\n" " /Supplement 0\n" " >>\n" " /FontDescriptor %d 0 R\n" " /W [0 [", cidfont_dict.id, subset->base_font, descriptor.id); for (i = 0; i < font_subset->num_glyphs; i++) _cairo_output_stream_printf (surface->output, " %d", subset->widths[i]); _cairo_output_stream_printf (surface->output, " ]]\n" ">>\n" "endobj\n"); _cairo_pdf_surface_update_object (surface, subset_resource); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Type /Font\n" " /Subtype /Type0\n" " /BaseFont /%s\n" " /Encoding /Identity-H\n" " /DescendantFonts [ %d 0 R]\n", subset_resource.id, subset->base_font, cidfont_dict.id); if (to_unicode_stream.id != 0) _cairo_output_stream_printf (surface->output, " /ToUnicode %d 0 R\n", to_unicode_stream.id); _cairo_output_stream_printf (surface->output, ">>\n" "endobj\n"); font.font_id = font_subset->font_id; font.subset_id = font_subset->subset_id; font.subset_resource = subset_resource; status = _cairo_array_append (&surface->fonts, &font); return status; } static cairo_status_t _cairo_pdf_surface_emit_cff_font_subset (cairo_pdf_surface_t *surface, cairo_scaled_font_subset_t *font_subset) { cairo_status_t status; cairo_cff_subset_t subset; char name[64]; snprintf (name, sizeof name, "CairoFont-%d-%d", font_subset->font_id, font_subset->subset_id); status = _cairo_cff_subset_init (&subset, name, font_subset); if (status) return status; status = _cairo_pdf_surface_emit_cff_font (surface, font_subset, &subset); _cairo_cff_subset_fini (&subset); return status; } static cairo_status_t _cairo_pdf_surface_emit_cff_fallback_font (cairo_pdf_surface_t *surface, cairo_scaled_font_subset_t *font_subset) { cairo_status_t status; cairo_cff_subset_t subset; char name[64]; snprintf (name, sizeof name, "CairoFont-%d-%d", font_subset->font_id, font_subset->subset_id); status = _cairo_cff_fallback_init (&subset, name, font_subset); if (status) return status; status = _cairo_pdf_surface_emit_cff_font (surface, font_subset, &subset); _cairo_cff_fallback_fini (&subset); return status; } static cairo_status_t _cairo_pdf_surface_emit_type1_font (cairo_pdf_surface_t *surface, cairo_scaled_font_subset_t *font_subset, cairo_type1_subset_t *subset) { cairo_pdf_resource_t stream, descriptor, subset_resource, to_unicode_stream; cairo_pdf_font_t font; cairo_status_t status; unsigned long length; unsigned int i; subset_resource = _cairo_pdf_surface_get_font_resource (surface, font_subset->font_id, font_subset->subset_id); if (subset_resource.id == 0) return CAIRO_STATUS_SUCCESS; /* We ignore the zero-trailer and set Length3 to 0. */ length = subset->header_length + subset->data_length; status = _cairo_pdf_surface_open_stream (surface, NULL, TRUE, " /Length1 %lu\n" " /Length2 %lu\n" " /Length3 0\n", subset->header_length, subset->data_length); if (status) return status; stream = surface->pdf_stream.self; _cairo_output_stream_write (surface->output, subset->data, length); status = _cairo_pdf_surface_close_stream (surface); if (status) return status; status = _cairo_pdf_surface_emit_to_unicode_stream (surface, font_subset, FALSE, &to_unicode_stream); if (status && status != CAIRO_INT_STATUS_UNSUPPORTED) return status; descriptor = _cairo_pdf_surface_new_object (surface); if (descriptor.id == 0) return _cairo_error (CAIRO_STATUS_NO_MEMORY); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Type /FontDescriptor\n" " /FontName /%s\n" " /Flags 4\n" " /FontBBox [ %ld %ld %ld %ld ]\n" " /ItalicAngle 0\n" " /Ascent %ld\n" " /Descent %ld\n" " /CapHeight 500\n" " /StemV 80\n" " /StemH 80\n" " /FontFile %u 0 R\n" ">>\n" "endobj\n", descriptor.id, subset->base_font, subset->x_min, subset->y_min, subset->x_max, subset->y_max, subset->ascent, subset->descent, stream.id); _cairo_pdf_surface_update_object (surface, subset_resource); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Type /Font\n" " /Subtype /Type1\n" " /BaseFont /%s\n" " /FirstChar 0\n" " /LastChar %d\n" " /FontDescriptor %d 0 R\n" " /Widths [", subset_resource.id, subset->base_font, font_subset->num_glyphs - 1, descriptor.id); for (i = 0; i < font_subset->num_glyphs; i++) _cairo_output_stream_printf (surface->output, " %d", subset->widths[i]); _cairo_output_stream_printf (surface->output, " ]\n"); if (to_unicode_stream.id != 0) _cairo_output_stream_printf (surface->output, " /ToUnicode %d 0 R\n", to_unicode_stream.id); _cairo_output_stream_printf (surface->output, ">>\n" "endobj\n"); font.font_id = font_subset->font_id; font.subset_id = font_subset->subset_id; font.subset_resource = subset_resource; return _cairo_array_append (&surface->fonts, &font); } #if CAIRO_HAS_FT_FONT static cairo_status_t _cairo_pdf_surface_emit_type1_font_subset (cairo_pdf_surface_t *surface, cairo_scaled_font_subset_t *font_subset) { cairo_status_t status; cairo_type1_subset_t subset; char name[64]; snprintf (name, sizeof name, "CairoFont-%d-%d", font_subset->font_id, font_subset->subset_id); status = _cairo_type1_subset_init (&subset, name, font_subset, FALSE); if (status) return status; status = _cairo_pdf_surface_emit_type1_font (surface, font_subset, &subset); _cairo_type1_subset_fini (&subset); return status; } #endif static cairo_status_t _cairo_pdf_surface_emit_type1_fallback_font (cairo_pdf_surface_t *surface, cairo_scaled_font_subset_t *font_subset) { cairo_status_t status; cairo_type1_subset_t subset; char name[64]; snprintf (name, sizeof name, "CairoFont-%d-%d", font_subset->font_id, font_subset->subset_id); status = _cairo_type1_fallback_init_binary (&subset, name, font_subset); if (status) return status; status = _cairo_pdf_surface_emit_type1_font (surface, font_subset, &subset); _cairo_type1_fallback_fini (&subset); return status; } #define PDF_UNITS_PER_EM 1000 static cairo_status_t _cairo_pdf_surface_emit_truetype_font_subset (cairo_pdf_surface_t *surface, cairo_scaled_font_subset_t *font_subset) { cairo_pdf_resource_t stream, descriptor, cidfont_dict; cairo_pdf_resource_t subset_resource, to_unicode_stream; cairo_status_t status; cairo_pdf_font_t font; cairo_truetype_subset_t subset; unsigned int i; subset_resource = _cairo_pdf_surface_get_font_resource (surface, font_subset->font_id, font_subset->subset_id); if (subset_resource.id == 0) return CAIRO_STATUS_SUCCESS; status = _cairo_truetype_subset_init (&subset, font_subset); if (status) return status; status = _cairo_pdf_surface_open_stream (surface, NULL, TRUE, " /Length1 %lu\n", subset.data_length); if (status) { _cairo_truetype_subset_fini (&subset); return status; } stream = surface->pdf_stream.self; _cairo_output_stream_write (surface->output, subset.data, subset.data_length); status = _cairo_pdf_surface_close_stream (surface); if (status) { _cairo_truetype_subset_fini (&subset); return status; } status = _cairo_pdf_surface_emit_to_unicode_stream (surface, font_subset, TRUE, &to_unicode_stream); if (status && status != CAIRO_INT_STATUS_UNSUPPORTED) { _cairo_truetype_subset_fini (&subset); return status; } descriptor = _cairo_pdf_surface_new_object (surface); if (descriptor.id == 0) { _cairo_truetype_subset_fini (&subset); return _cairo_error (CAIRO_STATUS_NO_MEMORY); } _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Type /FontDescriptor\n" " /FontName /%s\n" " /Flags 4\n" " /FontBBox [ %ld %ld %ld %ld ]\n" " /ItalicAngle 0\n" " /Ascent %ld\n" " /Descent %ld\n" " /CapHeight %ld\n" " /StemV 80\n" " /StemH 80\n" " /FontFile2 %u 0 R\n" ">>\n" "endobj\n", descriptor.id, subset.base_font, (long)(subset.x_min*PDF_UNITS_PER_EM), (long)(subset.y_min*PDF_UNITS_PER_EM), (long)(subset.x_max*PDF_UNITS_PER_EM), (long)(subset.y_max*PDF_UNITS_PER_EM), (long)(subset.ascent*PDF_UNITS_PER_EM), (long)(subset.descent*PDF_UNITS_PER_EM), (long)(subset.y_max*PDF_UNITS_PER_EM), stream.id); cidfont_dict = _cairo_pdf_surface_new_object (surface); if (cidfont_dict.id == 0) { _cairo_truetype_subset_fini (&subset); return _cairo_error (CAIRO_STATUS_NO_MEMORY); } _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Type /Font\n" " /Subtype /CIDFontType2\n" " /BaseFont /%s\n" " /CIDSystemInfo\n" " << /Registry (Adobe)\n" " /Ordering (Identity)\n" " /Supplement 0\n" " >>\n" " /FontDescriptor %d 0 R\n" " /W [0 [", cidfont_dict.id, subset.base_font, descriptor.id); for (i = 0; i < font_subset->num_glyphs; i++) _cairo_output_stream_printf (surface->output, " %ld", (long)(subset.widths[i]*PDF_UNITS_PER_EM)); _cairo_output_stream_printf (surface->output, " ]]\n" ">>\n" "endobj\n"); _cairo_pdf_surface_update_object (surface, subset_resource); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Type /Font\n" " /Subtype /Type0\n" " /BaseFont /%s\n" " /Encoding /Identity-H\n" " /DescendantFonts [ %d 0 R]\n", subset_resource.id, subset.base_font, cidfont_dict.id); if (to_unicode_stream.id != 0) _cairo_output_stream_printf (surface->output, " /ToUnicode %d 0 R\n", to_unicode_stream.id); _cairo_output_stream_printf (surface->output, ">>\n" "endobj\n"); font.font_id = font_subset->font_id; font.subset_id = font_subset->subset_id; font.subset_resource = subset_resource; status = _cairo_array_append (&surface->fonts, &font); _cairo_truetype_subset_fini (&subset); return status; } static cairo_status_t _cairo_pdf_emit_imagemask (cairo_image_surface_t *image, cairo_output_stream_t *stream) { uint8_t *byte, output_byte; int row, col, num_cols; /* The only image type supported by Type 3 fonts are 1-bit image * masks */ assert (image->format == CAIRO_FORMAT_A1); _cairo_output_stream_printf (stream, "BI\n" "/IM true\n" "/W %d\n" "/H %d\n" "/BPC 1\n" "/D [1 0]\n", image->width, image->height); _cairo_output_stream_printf (stream, "ID "); num_cols = (image->width + 7) / 8; for (row = 0; row < image->height; row++) { byte = image->data + row * image->stride; for (col = 0; col < num_cols; col++) { output_byte = CAIRO_BITSWAP8_IF_LITTLE_ENDIAN (*byte); _cairo_output_stream_write (stream, &output_byte, 1); byte++; } } _cairo_output_stream_printf (stream, "\nEI\n"); return _cairo_output_stream_get_status (stream); } static cairo_status_t _cairo_pdf_surface_analyze_user_font_subset (cairo_scaled_font_subset_t *font_subset, void *closure) { cairo_pdf_surface_t *surface = closure; cairo_status_t status = CAIRO_STATUS_SUCCESS; unsigned int i; cairo_surface_t *type3_surface; cairo_output_stream_t *null_stream; null_stream = _cairo_null_stream_create (); type3_surface = _cairo_type3_glyph_surface_create (font_subset->scaled_font, null_stream, _cairo_pdf_emit_imagemask, surface->font_subsets); _cairo_type3_glyph_surface_set_font_subsets_callback (type3_surface, _cairo_pdf_surface_add_font, surface); for (i = 1; i < font_subset->num_glyphs; i++) { status = _cairo_type3_glyph_surface_analyze_glyph (type3_surface, font_subset->glyphs[i]); if (status) break; } cairo_surface_destroy (type3_surface); status = _cairo_output_stream_destroy (null_stream); return status; } static cairo_status_t _cairo_pdf_surface_emit_type3_font_subset (cairo_pdf_surface_t *surface, cairo_scaled_font_subset_t *font_subset) { cairo_status_t status = CAIRO_STATUS_SUCCESS; cairo_pdf_resource_t *glyphs, encoding, char_procs, subset_resource, to_unicode_stream; cairo_pdf_font_t font; double *widths; unsigned int i; cairo_box_t font_bbox = {{0,0},{0,0}}; cairo_box_t bbox = {{0,0},{0,0}}; cairo_surface_t *type3_surface; if (font_subset->num_glyphs == 0) return CAIRO_STATUS_SUCCESS; subset_resource = _cairo_pdf_surface_get_font_resource (surface, font_subset->font_id, font_subset->subset_id); if (subset_resource.id == 0) return CAIRO_STATUS_SUCCESS; glyphs = _cairo_malloc_ab (font_subset->num_glyphs, sizeof (cairo_pdf_resource_t)); if (glyphs == NULL) return _cairo_error (CAIRO_STATUS_NO_MEMORY); widths = _cairo_malloc_ab (font_subset->num_glyphs, sizeof (double)); if (widths == NULL) { free (glyphs); return _cairo_error (CAIRO_STATUS_NO_MEMORY); } _cairo_pdf_group_resources_clear (&surface->resources); type3_surface = _cairo_type3_glyph_surface_create (font_subset->scaled_font, NULL, _cairo_pdf_emit_imagemask, surface->font_subsets); _cairo_type3_glyph_surface_set_font_subsets_callback (type3_surface, _cairo_pdf_surface_add_font, surface); for (i = 0; i < font_subset->num_glyphs; i++) { status = _cairo_pdf_surface_open_stream (surface, NULL, surface->compress_content, NULL); if (status) break; glyphs[i] = surface->pdf_stream.self; if (i == 0) { status = _cairo_type3_glyph_surface_emit_notdef_glyph (type3_surface, surface->output, &bbox, &widths[i]); } else { status = _cairo_type3_glyph_surface_emit_glyph (type3_surface, surface->output, font_subset->glyphs[i], &bbox, &widths[i]); } if (status) break; status = _cairo_pdf_surface_close_stream (surface); if (status) break; if (i == 0) { font_bbox.p1.x = bbox.p1.x; font_bbox.p1.y = bbox.p1.y; font_bbox.p2.x = bbox.p2.x; font_bbox.p2.y = bbox.p2.y; } else { if (bbox.p1.x < font_bbox.p1.x) font_bbox.p1.x = bbox.p1.x; if (bbox.p1.y < font_bbox.p1.y) font_bbox.p1.y = bbox.p1.y; if (bbox.p2.x > font_bbox.p2.x) font_bbox.p2.x = bbox.p2.x; if (bbox.p2.y > font_bbox.p2.y) font_bbox.p2.y = bbox.p2.y; } } cairo_surface_destroy (type3_surface); if (status) { free (glyphs); free (widths); return status; } encoding = _cairo_pdf_surface_new_object (surface); if (encoding.id == 0) { free (glyphs); free (widths); return _cairo_error (CAIRO_STATUS_NO_MEMORY); } _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Type /Encoding\n" " /Differences [0", encoding.id); for (i = 0; i < font_subset->num_glyphs; i++) _cairo_output_stream_printf (surface->output, " /%d", i); _cairo_output_stream_printf (surface->output, "]\n" ">>\n" "endobj\n"); char_procs = _cairo_pdf_surface_new_object (surface); if (char_procs.id == 0) { free (glyphs); free (widths); return _cairo_error (CAIRO_STATUS_NO_MEMORY); } _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<<\n", char_procs.id); for (i = 0; i < font_subset->num_glyphs; i++) _cairo_output_stream_printf (surface->output, " /%d %d 0 R\n", i, glyphs[i].id); _cairo_output_stream_printf (surface->output, ">>\n" "endobj\n"); free (glyphs); status = _cairo_pdf_surface_emit_to_unicode_stream (surface, font_subset, FALSE, &to_unicode_stream); if (status && status != CAIRO_INT_STATUS_UNSUPPORTED) { free (widths); return status; } _cairo_pdf_surface_update_object (surface, subset_resource); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Type /Font\n" " /Subtype /Type3\n" " /FontBBox [%f %f %f %f]\n" " /FontMatrix [ 1 0 0 1 0 0 ]\n" " /Encoding %d 0 R\n" " /CharProcs %d 0 R\n" " /FirstChar 0\n" " /LastChar %d\n", subset_resource.id, _cairo_fixed_to_double (font_bbox.p1.x), - _cairo_fixed_to_double (font_bbox.p2.y), _cairo_fixed_to_double (font_bbox.p2.x), - _cairo_fixed_to_double (font_bbox.p1.y), encoding.id, char_procs.id, font_subset->num_glyphs - 1); _cairo_output_stream_printf (surface->output, " /Widths ["); for (i = 0; i < font_subset->num_glyphs; i++) _cairo_output_stream_printf (surface->output, " %f", widths[i]); _cairo_output_stream_printf (surface->output, "]\n"); free (widths); _cairo_output_stream_printf (surface->output, " /Resources\n"); _cairo_pdf_surface_emit_group_resources (surface, &surface->resources); if (to_unicode_stream.id != 0) _cairo_output_stream_printf (surface->output, " /ToUnicode %d 0 R\n", to_unicode_stream.id); _cairo_output_stream_printf (surface->output, ">>\n" "endobj\n"); font.font_id = font_subset->font_id; font.subset_id = font_subset->subset_id; font.subset_resource = subset_resource; return _cairo_array_append (&surface->fonts, &font); } static cairo_status_t _cairo_pdf_surface_emit_unscaled_font_subset (cairo_scaled_font_subset_t *font_subset, void *closure) { cairo_pdf_surface_t *surface = closure; cairo_status_t status; if (font_subset->is_composite) { status = _cairo_pdf_surface_emit_cff_font_subset (surface, font_subset); if (status != CAIRO_INT_STATUS_UNSUPPORTED) return status; status = _cairo_pdf_surface_emit_truetype_font_subset (surface, font_subset); if (status != CAIRO_INT_STATUS_UNSUPPORTED) return status; status = _cairo_pdf_surface_emit_cff_fallback_font (surface, font_subset); if (status != CAIRO_INT_STATUS_UNSUPPORTED) return status; } else { #if CAIRO_HAS_FT_FONT status = _cairo_pdf_surface_emit_type1_font_subset (surface, font_subset); if (status != CAIRO_INT_STATUS_UNSUPPORTED) return status; #endif status = _cairo_pdf_surface_emit_type1_fallback_font (surface, font_subset); if (status != CAIRO_INT_STATUS_UNSUPPORTED) return status; } ASSERT_NOT_REACHED; return CAIRO_STATUS_SUCCESS; } static cairo_status_t _cairo_pdf_surface_emit_scaled_font_subset (cairo_scaled_font_subset_t *font_subset, void *closure) { cairo_pdf_surface_t *surface = closure; cairo_status_t status; status = _cairo_pdf_surface_emit_type3_font_subset (surface, font_subset); if (status != CAIRO_INT_STATUS_UNSUPPORTED) return status; ASSERT_NOT_REACHED; return CAIRO_STATUS_SUCCESS; } static cairo_status_t _cairo_pdf_surface_emit_font_subsets (cairo_pdf_surface_t *surface) { cairo_status_t status; status = _cairo_scaled_font_subsets_foreach_user (surface->font_subsets, _cairo_pdf_surface_analyze_user_font_subset, surface); if (status) goto BAIL; status = _cairo_scaled_font_subsets_foreach_unscaled (surface->font_subsets, _cairo_pdf_surface_emit_unscaled_font_subset, surface); if (status) goto BAIL; status = _cairo_scaled_font_subsets_foreach_scaled (surface->font_subsets, _cairo_pdf_surface_emit_scaled_font_subset, surface); if (status) goto BAIL; status = _cairo_scaled_font_subsets_foreach_user (surface->font_subsets, _cairo_pdf_surface_emit_scaled_font_subset, surface); BAIL: _cairo_scaled_font_subsets_destroy (surface->font_subsets); surface->font_subsets = NULL; return status; } static cairo_pdf_resource_t _cairo_pdf_surface_write_catalog (cairo_pdf_surface_t *surface) { cairo_pdf_resource_t catalog; catalog = _cairo_pdf_surface_new_object (surface); if (catalog.id == 0) return catalog; _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Type /Catalog\n" " /Pages %d 0 R\n" ">>\n" "endobj\n", catalog.id, surface->pages_resource.id); return catalog; } static long _cairo_pdf_surface_write_xref (cairo_pdf_surface_t *surface) { cairo_pdf_object_t *object; int num_objects, i; long offset; char buffer[11]; num_objects = _cairo_array_num_elements (&surface->objects); offset = _cairo_output_stream_get_position (surface->output); _cairo_output_stream_printf (surface->output, "xref\n" "%d %d\n", 0, num_objects + 1); _cairo_output_stream_printf (surface->output, "0000000000 65535 f \n"); for (i = 0; i < num_objects; i++) { object = _cairo_array_index (&surface->objects, i); snprintf (buffer, sizeof buffer, "%010ld", object->offset); _cairo_output_stream_printf (surface->output, "%s 00000 n \n", buffer); } return offset; } static cairo_status_t _cairo_pdf_surface_write_mask_group (cairo_pdf_surface_t *surface, cairo_pdf_smask_group_t *group) { cairo_pdf_resource_t mask_group; cairo_pdf_resource_t smask; cairo_pdf_smask_group_t *smask_group; cairo_pdf_resource_t pattern_res, gstate_res; cairo_status_t status; /* Create mask group */ status = _cairo_pdf_surface_open_group (surface, NULL); if (status) return status; pattern_res.id = 0; gstate_res.id = 0; status = _cairo_pdf_surface_add_pdf_pattern (surface, group->mask, &pattern_res, &gstate_res); if (status) return status; if (gstate_res.id != 0) { smask_group = _cairo_pdf_surface_create_smask_group (surface); if (smask_group == NULL) return _cairo_error (CAIRO_STATUS_NO_MEMORY); smask_group->operation = PDF_PAINT; smask_group->source = cairo_pattern_reference (group->mask); smask_group->source_res = pattern_res; status = _cairo_pdf_surface_add_smask_group (surface, smask_group); if (status) { _cairo_pdf_smask_group_destroy (smask_group); return status; } status = _cairo_pdf_surface_add_smask (surface, gstate_res); if (status) return status; status = _cairo_pdf_surface_add_xobject (surface, smask_group->group_res); if (status) return status; _cairo_output_stream_printf (surface->output, "q /s%d gs /x%d Do Q\n", gstate_res.id, smask_group->group_res.id); } else { status = _cairo_pdf_surface_select_pattern (surface, group->mask, pattern_res, FALSE); if (status) return status; _cairo_output_stream_printf (surface->output, "0 0 %f %f re f\n", surface->width, surface->height); status = _cairo_pdf_surface_unselect_pattern (surface); if (status) return status; } status = _cairo_pdf_surface_close_group (surface, &mask_group); if (status) return status; /* Create source group */ status = _cairo_pdf_surface_open_group (surface, &group->source_res); if (status) return status; pattern_res.id = 0; gstate_res.id = 0; status = _cairo_pdf_surface_add_pdf_pattern (surface, group->source, &pattern_res, &gstate_res); if (status) return status; if (gstate_res.id != 0) { smask_group = _cairo_pdf_surface_create_smask_group (surface); if (smask_group == NULL) return _cairo_error (CAIRO_STATUS_NO_MEMORY); smask_group->operation = PDF_PAINT; smask_group->source = cairo_pattern_reference (group->source); smask_group->source_res = pattern_res; status = _cairo_pdf_surface_add_smask_group (surface, smask_group); if (status) { _cairo_pdf_smask_group_destroy (smask_group); return status; } status = _cairo_pdf_surface_add_smask (surface, gstate_res); if (status) return status; status = _cairo_pdf_surface_add_xobject (surface, smask_group->group_res); if (status) return status; _cairo_output_stream_printf (surface->output, "q /s%d gs /x%d Do Q\n", gstate_res.id, smask_group->group_res.id); } else { status = _cairo_pdf_surface_select_pattern (surface, group->source, pattern_res, FALSE); if (status) return status; _cairo_output_stream_printf (surface->output, "0 0 %f %f re f\n", surface->width, surface->height); status = _cairo_pdf_surface_unselect_pattern (surface); if (status) return status; } status = _cairo_pdf_surface_close_group (surface, NULL); if (status) return status; /* Create an smask based on the alpha component of mask_group */ smask = _cairo_pdf_surface_new_object (surface); if (smask.id == 0) return _cairo_error (CAIRO_STATUS_NO_MEMORY); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Type /Mask\n" " /S /Alpha\n" " /G %d 0 R\n" ">>\n" "endobj\n", smask.id, mask_group.id); /* Create a GState that uses the smask */ _cairo_pdf_surface_update_object (surface, group->group_res); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Type /ExtGState\n" " /SMask %d 0 R\n" " /ca 1\n" " /CA 1\n" " /AIS false\n" ">>\n" "endobj\n", group->group_res.id, smask.id); return _cairo_output_stream_get_status (surface->output); } static cairo_status_t _cairo_pdf_surface_write_smask_group (cairo_pdf_surface_t *surface, cairo_pdf_smask_group_t *group) { double old_width, old_height; cairo_status_t status; old_width = surface->width; old_height = surface->height; _cairo_pdf_surface_set_size_internal (surface, group->width, group->height); /* _mask is a special case that requires two groups - source * and mask as well as a smask and gstate dictionary */ if (group->operation == PDF_MASK) return _cairo_pdf_surface_write_mask_group (surface, group); status = _cairo_pdf_surface_open_group (surface, &group->group_res); if (status) return status; status = _cairo_pdf_surface_select_pattern (surface, group->source, group->source_res, group->operation == PDF_STROKE); if (status) return status; switch (group->operation) { case PDF_PAINT: _cairo_output_stream_printf (surface->output, "0 0 %f %f re f\n", surface->width, surface->height); break; case PDF_MASK: ASSERT_NOT_REACHED; break; case PDF_FILL: status = _cairo_pdf_operators_fill (&surface->pdf_operators, &group->path, group->fill_rule); break; case PDF_STROKE: status = _cairo_pdf_operators_stroke (&surface->pdf_operators, &group->path, group->style, &group->ctm, &group->ctm_inverse); break; case PDF_SHOW_GLYPHS: status = _cairo_pdf_operators_show_text_glyphs (&surface->pdf_operators, group->utf8, group->utf8_len, group->glyphs, group->num_glyphs, group->clusters, group->num_clusters, group->backward, group->scaled_font); break; } if (status) return status; status = _cairo_pdf_surface_unselect_pattern (surface); if (status) return status; status = _cairo_pdf_surface_close_group (surface, NULL); _cairo_pdf_surface_set_size_internal (surface, old_width, old_height); return status; } static cairo_status_t _cairo_pdf_surface_write_patterns_and_smask_groups (cairo_pdf_surface_t *surface) { cairo_pdf_pattern_t pattern; cairo_pdf_smask_group_t *group; int pattern_index, group_index; cairo_status_t status; /* Writing out PDF_MASK groups will cause additional smask groups * to be appended to surface->smask_groups. Additional patterns * may also be appended to surface->patterns. * * Writing meta surface patterns will cause additional patterns * and groups to be appended. */ pattern_index = 0; group_index = 0; while ((pattern_index < _cairo_array_num_elements (&surface->patterns)) || (group_index < _cairo_array_num_elements (&surface->smask_groups))) { for (; group_index < _cairo_array_num_elements (&surface->smask_groups); group_index++) { _cairo_array_copy_element (&surface->smask_groups, group_index, &group); status = _cairo_pdf_surface_write_smask_group (surface, group); if (status) return status; } for (; pattern_index < _cairo_array_num_elements (&surface->patterns); pattern_index++) { _cairo_array_copy_element (&surface->patterns, pattern_index, &pattern); status = _cairo_pdf_surface_emit_pattern (surface, &pattern); if (status) return status; } } return CAIRO_STATUS_SUCCESS; } static cairo_status_t _cairo_pdf_surface_write_page (cairo_pdf_surface_t *surface) { cairo_pdf_resource_t page, knockout, res; cairo_status_t status; int i, len; _cairo_pdf_group_resources_clear (&surface->resources); if (surface->has_fallback_images) { status = _cairo_pdf_surface_open_knockout_group (surface); if (status) return status; len = _cairo_array_num_elements (&surface->knockout_group); for (i = 0; i < len; i++) { _cairo_array_copy_element (&surface->knockout_group, i, &res); _cairo_output_stream_printf (surface->output, "/x%d Do\n", res.id); status = _cairo_pdf_surface_add_xobject (surface, res); if (status) return status; } _cairo_output_stream_printf (surface->output, "/x%d Do\n", surface->content.id); status = _cairo_pdf_surface_add_xobject (surface, surface->content); if (status) return status; status = _cairo_pdf_surface_close_group (surface, &knockout); if (status) return status; _cairo_pdf_group_resources_clear (&surface->resources); status = _cairo_pdf_surface_open_content_stream (surface, FALSE); if (status) return status; _cairo_output_stream_printf (surface->output, "/x%d Do\n", knockout.id); status = _cairo_pdf_surface_add_xobject (surface, knockout); if (status) return status; status = _cairo_pdf_surface_close_content_stream (surface); if (status) return status; } page = _cairo_pdf_surface_new_object (surface); if (page.id == 0) return _cairo_error (CAIRO_STATUS_NO_MEMORY); _cairo_output_stream_printf (surface->output, "%d 0 obj\n" "<< /Type /Page\n" " /Parent %d 0 R\n" " /MediaBox [ 0 0 %f %f ]\n" " /Contents %d 0 R\n" " /Group <<\n" " /Type /Group\n" " /S /Transparency\n" " /CS /DeviceRGB\n" " >>\n" " /Resources %d 0 R\n" ">>\n" "endobj\n", page.id, surface->pages_resource.id, surface->width, surface->height, surface->content.id, surface->content_resources.id); status = _cairo_array_append (&surface->pages, &page); if (status) return status; status = _cairo_pdf_surface_write_patterns_and_smask_groups (surface); if (status) return status; return CAIRO_STATUS_SUCCESS; } static cairo_int_status_t _cairo_pdf_surface_analyze_surface_pattern_transparency (cairo_pdf_surface_t *surface, cairo_surface_pattern_t *pattern) { cairo_image_surface_t *image; void *image_extra; cairo_int_status_t status; cairo_image_transparency_t transparency; status = _cairo_surface_acquire_source_image (pattern->surface, &image, &image_extra); if (status) return status; if (image->base.status) return image->base.status; transparency = _cairo_image_analyze_transparency (image); if (transparency == CAIRO_IMAGE_IS_OPAQUE) status = CAIRO_STATUS_SUCCESS; else status = CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY; _cairo_surface_release_source_image (pattern->surface, image, image_extra); return status; } static cairo_bool_t _surface_pattern_supported (cairo_surface_pattern_t *pattern) { cairo_extend_t extend; if (_cairo_surface_is_meta (pattern->surface)) return TRUE; if (pattern->surface->backend->acquire_source_image == NULL) return FALSE; /* Does an ALPHA-only source surface even make sense? Maybe, but I * don't think it's worth the extra code to support it. */ /* XXX: Need to write this function here... content = cairo_surface_get_content (pattern->surface); if (content == CAIRO_CONTENT_ALPHA) return FALSE; */ extend = cairo_pattern_get_extend (&pattern->base); switch (extend) { case CAIRO_EXTEND_NONE: case CAIRO_EXTEND_REPEAT: case CAIRO_EXTEND_REFLECT: /* There's no point returning FALSE for EXTEND_PAD, as the image * surface does not currently implement it either */ case CAIRO_EXTEND_PAD: return TRUE; } ASSERT_NOT_REACHED; return FALSE; } static cairo_bool_t _gradient_pattern_supported (cairo_pattern_t *pattern) { cairo_extend_t extend; extend = cairo_pattern_get_extend (pattern); /* Radial gradients are currently only supported with EXTEND_NONE * and EXTEND_PAD and when one circle is inside the other. */ if (pattern->type == CAIRO_PATTERN_TYPE_RADIAL) { double x1, y1, x2, y2, r1, r2, d; cairo_radial_pattern_t *radial = (cairo_radial_pattern_t *) pattern; if (extend == CAIRO_EXTEND_REPEAT || extend == CAIRO_EXTEND_REFLECT) { return FALSE; } x1 = _cairo_fixed_to_double (radial->c1.x); y1 = _cairo_fixed_to_double (radial->c1.y); r1 = _cairo_fixed_to_double (radial->r1); x2 = _cairo_fixed_to_double (radial->c2.x); y2 = _cairo_fixed_to_double (radial->c2.y); r2 = _cairo_fixed_to_double (radial->r2); d = sqrt((x2 - x1)*(x2 - x1) + (y2 - y1)*(y2 - y1)); if (d > fabs(r2 - r1)) { return FALSE; } } return TRUE; } static cairo_bool_t _pattern_supported (cairo_pattern_t *pattern) { if (pattern->type == CAIRO_PATTERN_TYPE_SOLID) return TRUE; if (pattern->type == CAIRO_PATTERN_TYPE_LINEAR || pattern->type == CAIRO_PATTERN_TYPE_RADIAL) return _gradient_pattern_supported (pattern); if (pattern->type == CAIRO_PATTERN_TYPE_SURFACE) return _surface_pattern_supported ((cairo_surface_pattern_t *) pattern); return FALSE; } static cairo_int_status_t _cairo_pdf_surface_analyze_operation (cairo_pdf_surface_t *surface, cairo_operator_t op, cairo_pattern_t *pattern) { if (surface->force_fallbacks && surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) return CAIRO_INT_STATUS_UNSUPPORTED; if (! _pattern_supported (pattern)) return CAIRO_INT_STATUS_UNSUPPORTED; if (op == CAIRO_OPERATOR_OVER) { if (pattern->type == CAIRO_PATTERN_TYPE_SURFACE) { cairo_surface_pattern_t *surface_pattern = (cairo_surface_pattern_t *) pattern; if ( _cairo_surface_is_meta (surface_pattern->surface)) return CAIRO_INT_STATUS_ANALYZE_META_SURFACE_PATTERN; } } if (op == CAIRO_OPERATOR_OVER) return CAIRO_STATUS_SUCCESS; /* The SOURCE operator is supported if the pattern is opaque or if * there is nothing painted underneath. */ if (op == CAIRO_OPERATOR_SOURCE) { if (pattern->type == CAIRO_PATTERN_TYPE_SURFACE) { cairo_surface_pattern_t *surface_pattern = (cairo_surface_pattern_t *) pattern; if (_cairo_surface_is_meta (surface_pattern->surface)) { if (_cairo_pattern_is_opaque (pattern)) { return CAIRO_INT_STATUS_ANALYZE_META_SURFACE_PATTERN; } else { /* FIXME: The analysis surface does not yet have * the capability to analyze a non opaque meta * surface and mark it supported if there is * nothing underneath. For now meta surfaces of * type CONTENT_COLOR_ALPHA painted with * OPERATOR_SOURCE will result in a fallback * image. */ return CAIRO_INT_STATUS_UNSUPPORTED; } } else { return _cairo_pdf_surface_analyze_surface_pattern_transparency (surface, surface_pattern); } } if (_cairo_pattern_is_opaque (pattern)) return CAIRO_STATUS_SUCCESS; else return CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY; } return CAIRO_INT_STATUS_UNSUPPORTED; } static cairo_bool_t _cairo_pdf_surface_operation_supported (cairo_pdf_surface_t *surface, cairo_operator_t op, cairo_pattern_t *pattern) { if (_cairo_pdf_surface_analyze_operation (surface, op, pattern) != CAIRO_INT_STATUS_UNSUPPORTED) return TRUE; else return FALSE; } static cairo_int_status_t _cairo_pdf_surface_start_fallback (cairo_pdf_surface_t *surface) { cairo_status_t status; status = _cairo_pdf_surface_close_content_stream (surface); if (status) return status; status = _cairo_array_append (&surface->knockout_group, &surface->content); if (status) return status; _cairo_pdf_group_resources_clear (&surface->resources); return _cairo_pdf_surface_open_content_stream (surface, TRUE); } static cairo_int_status_t _cairo_pdf_surface_paint (void *abstract_surface, cairo_operator_t op, cairo_pattern_t *source) { cairo_pdf_surface_t *surface = abstract_surface; cairo_status_t status; cairo_pdf_smask_group_t *group; cairo_pdf_resource_t pattern_res, gstate_res; if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) { return _cairo_pdf_surface_analyze_operation (surface, op, source); } else if (surface->paginated_mode == CAIRO_PAGINATED_MODE_FALLBACK) { status = _cairo_pdf_surface_start_fallback (surface); if (status) return status; } assert (_cairo_pdf_surface_operation_supported (surface, op, source)); pattern_res.id = 0; gstate_res.id = 0; status = _cairo_pdf_surface_add_pdf_pattern (surface, source, &pattern_res, &gstate_res); if (status == CAIRO_INT_STATUS_NOTHING_TO_DO) return CAIRO_STATUS_SUCCESS; if (status) return status; if (gstate_res.id != 0) { group = _cairo_pdf_surface_create_smask_group (surface); if (group == NULL) return _cairo_error (CAIRO_STATUS_NO_MEMORY); group->operation = PDF_PAINT; group->source = cairo_pattern_reference (source); group->source_res = pattern_res; status = _cairo_pdf_surface_add_smask_group (surface, group); if (status) { _cairo_pdf_smask_group_destroy (group); return status; } status = _cairo_pdf_surface_add_smask (surface, gstate_res); if (status) return status; status = _cairo_pdf_surface_add_xobject (surface, group->group_res); if (status) return status; status = _cairo_pdf_operators_flush (&surface->pdf_operators); if (status) return status; _cairo_output_stream_printf (surface->output, "q /s%d gs /x%d Do Q\n", gstate_res.id, group->group_res.id); } else { status = _cairo_pdf_surface_select_pattern (surface, source, pattern_res, FALSE); if (status) return status; _cairo_output_stream_printf (surface->output, "0 0 %f %f re f\n", surface->width, surface->height); status = _cairo_pdf_surface_unselect_pattern (surface); if (status) return status; } return _cairo_output_stream_get_status (surface->output); } static cairo_int_status_t _cairo_pdf_surface_mask (void *abstract_surface, cairo_operator_t op, cairo_pattern_t *source, cairo_pattern_t *mask) { cairo_pdf_surface_t *surface = abstract_surface; cairo_pdf_smask_group_t *group; cairo_status_t status, status2; if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) { status = _cairo_pdf_surface_analyze_operation (surface, op, source); if (status != CAIRO_STATUS_SUCCESS && status != CAIRO_INT_STATUS_ANALYZE_META_SURFACE_PATTERN) return status; status2 = _cairo_pdf_surface_analyze_operation (surface, op, mask); if (status2 != CAIRO_STATUS_SUCCESS) return status2; return status; } else if (surface->paginated_mode == CAIRO_PAGINATED_MODE_FALLBACK) { status = _cairo_pdf_surface_start_fallback (surface); if (status) return status; } assert (_cairo_pdf_surface_operation_supported (surface, op, source)); assert (_cairo_pdf_surface_operation_supported (surface, op, mask)); group = _cairo_pdf_surface_create_smask_group (surface); if (group == NULL) return _cairo_error (CAIRO_STATUS_NO_MEMORY); group->operation = PDF_MASK; group->source = cairo_pattern_reference (source); group->mask = cairo_pattern_reference (mask); group->source_res = _cairo_pdf_surface_new_object (surface); if (group->source_res.id == 0) { _cairo_pdf_smask_group_destroy (group); return _cairo_error (CAIRO_STATUS_NO_MEMORY); } status = _cairo_pdf_surface_add_smask_group (surface, group); if (status) { _cairo_pdf_smask_group_destroy (group); return status; } status = _cairo_pdf_surface_add_smask (surface, group->group_res); if (status) return status; status = _cairo_pdf_surface_add_xobject (surface, group->source_res); if (status) return status; status = _cairo_pdf_operators_flush (&surface->pdf_operators); if (status) return status; _cairo_output_stream_printf (surface->output, "q /s%d gs /x%d Do Q\n", group->group_res.id, group->source_res.id); return _cairo_output_stream_get_status (surface->output); } static cairo_int_status_t _cairo_pdf_surface_stroke (void *abstract_surface, cairo_operator_t op, cairo_pattern_t *source, cairo_path_fixed_t *path, cairo_stroke_style_t *style, cairo_matrix_t *ctm, cairo_matrix_t *ctm_inverse, double tolerance, cairo_antialias_t antialias) { cairo_pdf_surface_t *surface = abstract_surface; cairo_status_t status; cairo_pdf_smask_group_t *group; cairo_pdf_resource_t pattern_res, gstate_res; if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) return _cairo_pdf_surface_analyze_operation (surface, op, source); assert (_cairo_pdf_surface_operation_supported (surface, op, source)); pattern_res.id = 0; gstate_res.id = 0; status = _cairo_pdf_surface_add_pdf_pattern (surface, source, &pattern_res, &gstate_res); if (status == CAIRO_INT_STATUS_NOTHING_TO_DO) return CAIRO_STATUS_SUCCESS; if (status) return status; if (gstate_res.id != 0) { group = _cairo_pdf_surface_create_smask_group (surface); if (group == NULL) return _cairo_error (CAIRO_STATUS_NO_MEMORY); group->operation = PDF_STROKE; group->source = cairo_pattern_reference (source); group->source_res = pattern_res; status = _cairo_path_fixed_init_copy (&group->path, path); if (status) { _cairo_pdf_smask_group_destroy (group); return status; } group->style = style; group->ctm = *ctm; group->ctm_inverse = *ctm_inverse; status = _cairo_pdf_surface_add_smask_group (surface, group); if (status) { _cairo_pdf_smask_group_destroy (group); return status; } status = _cairo_pdf_surface_add_smask (surface, gstate_res); if (status) return status; status = _cairo_pdf_surface_add_xobject (surface, group->group_res); if (status) return status; status = _cairo_pdf_operators_flush (&surface->pdf_operators); if (status) return status; _cairo_output_stream_printf (surface->output, "q /s%d gs /x%d Do Q\n", gstate_res.id, group->group_res.id); } else { status = _cairo_pdf_surface_select_pattern (surface, source, pattern_res, TRUE); if (status) return status; status = _cairo_pdf_operators_stroke (&surface->pdf_operators, path, style, ctm, ctm_inverse); if (status) return status; status = _cairo_pdf_surface_unselect_pattern (surface); if (status) return status; } return _cairo_output_stream_get_status (surface->output); } static cairo_int_status_t _cairo_pdf_surface_fill (void *abstract_surface, cairo_operator_t op, cairo_pattern_t *source, cairo_path_fixed_t *path, cairo_fill_rule_t fill_rule, double tolerance, cairo_antialias_t antialias) { cairo_pdf_surface_t *surface = abstract_surface; cairo_status_t status; cairo_pdf_smask_group_t *group; cairo_pdf_resource_t pattern_res, gstate_res; if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) { return _cairo_pdf_surface_analyze_operation (surface, op, source); } else if (surface->paginated_mode == CAIRO_PAGINATED_MODE_FALLBACK) { status = _cairo_pdf_surface_start_fallback (surface); if (status) return status; } assert (_cairo_pdf_surface_operation_supported (surface, op, source)); pattern_res.id = 0; gstate_res.id = 0; status = _cairo_pdf_surface_add_pdf_pattern (surface, source, &pattern_res, &gstate_res); if (status == CAIRO_INT_STATUS_NOTHING_TO_DO) return CAIRO_STATUS_SUCCESS; if (status) return status; if (gstate_res.id != 0) { group = _cairo_pdf_surface_create_smask_group (surface); if (group == NULL) return _cairo_error (CAIRO_STATUS_NO_MEMORY); group->operation = PDF_FILL; group->source = cairo_pattern_reference (source); group->source_res = pattern_res; status = _cairo_path_fixed_init_copy (&group->path, path); if (status) { _cairo_pdf_smask_group_destroy (group); return status; } group->fill_rule = fill_rule; status = _cairo_pdf_surface_add_smask_group (surface, group); if (status) { _cairo_pdf_smask_group_destroy (group); return status; } status = _cairo_pdf_surface_add_smask (surface, gstate_res); if (status) return status; status = _cairo_pdf_surface_add_xobject (surface, group->group_res); if (status) return status; status = _cairo_pdf_operators_flush (&surface->pdf_operators); if (status) return status; _cairo_output_stream_printf (surface->output, "q /s%d gs /x%d Do Q\n", gstate_res.id, group->group_res.id); } else { status = _cairo_pdf_surface_select_pattern (surface, source, pattern_res, FALSE); if (status) return status; status = _cairo_pdf_operators_fill (&surface->pdf_operators, path, fill_rule); if (status) return status; status = _cairo_pdf_surface_unselect_pattern (surface); if (status) return status; } return _cairo_output_stream_get_status (surface->output); } static cairo_int_status_t _cairo_pdf_surface_fill_stroke (void *abstract_surface, cairo_operator_t fill_op, cairo_pattern_t *fill_source, cairo_fill_rule_t fill_rule, double fill_tolerance, cairo_antialias_t fill_antialias, cairo_path_fixed_t *path, cairo_operator_t stroke_op, cairo_pattern_t *stroke_source, cairo_stroke_style_t *stroke_style, cairo_matrix_t *stroke_ctm, cairo_matrix_t *stroke_ctm_inverse, double stroke_tolerance, cairo_antialias_t stroke_antialias) { cairo_pdf_surface_t *surface = abstract_surface; cairo_status_t status; cairo_pdf_resource_t fill_pattern_res, stroke_pattern_res, gstate_res; /* During analysis we return unsupported and let the _fill and * _stroke functions that are on the fallback path do the analysis * for us. During render we may still encounter unsupported * combinations of fill/stroke patterns. However we can return * unsupported anytime to let the _fill and _stroke functions take * over. */ if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) return CAIRO_INT_STATUS_UNSUPPORTED; /* PDF rendering of fill-stroke is not the same as cairo when * either the fill or stroke is not opaque. */ if ( !_cairo_pattern_is_opaque (fill_source) || !_cairo_pattern_is_opaque (stroke_source)) { return CAIRO_INT_STATUS_UNSUPPORTED; } fill_pattern_res.id = 0; gstate_res.id = 0; status = _cairo_pdf_surface_add_pdf_pattern (surface, fill_source, &fill_pattern_res, &gstate_res); if (status) return status; assert (gstate_res.id == 0); stroke_pattern_res.id = 0; gstate_res.id = 0; status = _cairo_pdf_surface_add_pdf_pattern (surface, stroke_source, &stroke_pattern_res, &gstate_res); if (status) return status; assert (gstate_res.id == 0); /* As PDF has separate graphics state for fill and stroke we can * select both at the same time */ status = _cairo_pdf_surface_select_pattern (surface, fill_source, fill_pattern_res, FALSE); if (status) return status; status = _cairo_pdf_surface_select_pattern (surface, stroke_source, stroke_pattern_res, TRUE); if (status) return status; status = _cairo_pdf_operators_fill_stroke (&surface->pdf_operators, path, fill_rule, stroke_style, stroke_ctm, stroke_ctm_inverse); if (status) return status; status = _cairo_pdf_surface_unselect_pattern (surface); if (status) return status; return _cairo_output_stream_get_status (surface->output); } static cairo_bool_t _cairo_pdf_surface_has_show_text_glyphs (void *abstract_surface) { return TRUE; } static cairo_int_status_t _cairo_pdf_surface_show_text_glyphs (void *abstract_surface, cairo_operator_t op, cairo_pattern_t *source, const char *utf8, int utf8_len, cairo_glyph_t *glyphs, int num_glyphs, const cairo_text_cluster_t *clusters, int num_clusters, cairo_bool_t backward, cairo_scaled_font_t *scaled_font) { cairo_pdf_surface_t *surface = abstract_surface; cairo_status_t status; cairo_pdf_smask_group_t *group; cairo_pdf_resource_t pattern_res, gstate_res; if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) return _cairo_pdf_surface_analyze_operation (surface, op, source); assert (_cairo_pdf_surface_operation_supported (surface, op, source)); pattern_res.id = 0; gstate_res.id = 0; status = _cairo_pdf_surface_add_pdf_pattern (surface, source, &pattern_res, &gstate_res); if (status == CAIRO_INT_STATUS_NOTHING_TO_DO) return CAIRO_STATUS_SUCCESS; if (status) return status; if (gstate_res.id != 0) { group = _cairo_pdf_surface_create_smask_group (surface); if (group == NULL) return _cairo_error (CAIRO_STATUS_NO_MEMORY); group->operation = PDF_SHOW_GLYPHS; group->source = cairo_pattern_reference (source); group->source_res = pattern_res; if (utf8_len) { group->utf8 = malloc (utf8_len); if (group->utf8 == NULL) { _cairo_pdf_smask_group_destroy (group); return _cairo_error (CAIRO_STATUS_NO_MEMORY); } memcpy (group->utf8, utf8, utf8_len); } group->utf8_len = utf8_len; if (num_glyphs) { group->glyphs = _cairo_malloc_ab (num_glyphs, sizeof (cairo_glyph_t)); if (group->glyphs == NULL) { _cairo_pdf_smask_group_destroy (group); return _cairo_error (CAIRO_STATUS_NO_MEMORY); } memcpy (group->glyphs, glyphs, sizeof (cairo_glyph_t) * num_glyphs); } group->num_glyphs = num_glyphs; if (num_clusters) { group->clusters = _cairo_malloc_ab (num_clusters, sizeof (cairo_text_cluster_t)); if (group->clusters == NULL) { _cairo_pdf_smask_group_destroy (group); return _cairo_error (CAIRO_STATUS_NO_MEMORY); } memcpy (group->clusters, clusters, sizeof (cairo_text_cluster_t) * num_clusters); } group->num_clusters = num_clusters; group->scaled_font = cairo_scaled_font_reference (scaled_font); status = _cairo_pdf_surface_add_smask_group (surface, group); if (status) { _cairo_pdf_smask_group_destroy (group); return status; } status = _cairo_pdf_surface_add_smask (surface, gstate_res); if (status) return status; status = _cairo_pdf_surface_add_xobject (surface, group->group_res); if (status) return status; status = _cairo_pdf_operators_flush (&surface->pdf_operators); if (status) return status; _cairo_output_stream_printf (surface->output, "q /s%d gs /x%d Do Q\n", gstate_res.id, group->group_res.id); } else { status = _cairo_pdf_surface_select_pattern (surface, source, pattern_res, FALSE); if (status) return status; /* Each call to show_glyphs() with a transclucent pattern must * be in a separate text object otherwise overlapping text * from separate calls to show_glyphs will not composite with * each other. */ if (! _cairo_pattern_is_opaque (source)) { status = _cairo_pdf_operators_flush (&surface->pdf_operators); if (status) return status; } status = _cairo_pdf_operators_show_text_glyphs (&surface->pdf_operators, utf8, utf8_len, glyphs, num_glyphs, clusters, num_clusters, backward, scaled_font); if (status) return status; status = _cairo_pdf_surface_unselect_pattern (surface); if (status) return status; } return _cairo_output_stream_get_status (surface->output); } static void _cairo_pdf_surface_set_paginated_mode (void *abstract_surface, cairo_paginated_mode_t paginated_mode) { cairo_pdf_surface_t *surface = abstract_surface; surface->paginated_mode = paginated_mode; } static const cairo_surface_backend_t cairo_pdf_surface_backend = { CAIRO_SURFACE_TYPE_PDF, _cairo_pdf_surface_create_similar, _cairo_pdf_surface_finish, NULL, /* acquire_source_image */ NULL, /* release_source_image */ NULL, /* acquire_dest_image */ NULL, /* release_dest_image */ NULL, /* clone_similar */ NULL, /* composite */ NULL, /* fill_rectangles */ NULL, /* composite_trapezoids */ NULL, /* _cairo_pdf_surface_copy_page */ _cairo_pdf_surface_show_page, NULL, /* set_clip_region */ _cairo_pdf_surface_intersect_clip_path, _cairo_pdf_surface_get_extents, NULL, /* old_show_glyphs */ _cairo_pdf_surface_get_font_options, NULL, /* flush */ NULL, /* mark_dirty_rectangle */ NULL, /* scaled_font_fini */ NULL, /* scaled_glyph_fini */ /* Here are the drawing functions */ _cairo_pdf_surface_paint, _cairo_pdf_surface_mask, _cairo_pdf_surface_stroke, _cairo_pdf_surface_fill, NULL, /* show_glyphs */ NULL, /* snapshot */ NULL, /* is_compatible */ NULL, /* reset */ _cairo_pdf_surface_fill_stroke, NULL, /* create_solid_pattern_surface */ _cairo_pdf_surface_has_show_text_glyphs, _cairo_pdf_surface_show_text_glyphs, }; static const cairo_paginated_surface_backend_t cairo_pdf_surface_paginated_backend = { _cairo_pdf_surface_start_page, _cairo_pdf_surface_set_paginated_mode, NULL, /* set_bounding_box */ _cairo_pdf_surface_has_fallback_images, };