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/* -*- Mode: C; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim: set sw=4 sts=4 expandtab: */
/*
rsvg-shapes.c: Draw shapes with cairo
Copyright (C) 2005 Dom Lachowicz <cinamod@hotmail.com>
Copyright (C) 2005 Caleb Moore <c.moore@student.unsw.edu.au>
Copyright (C) 2005 Red Hat, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this program; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
Authors: Dom Lachowicz <cinamod@hotmail.com>,
Caleb Moore <c.moore@student.unsw.edu.au>
Carl Worth <cworth@cworth.org>
*/
#include "config.h"
#include "rsvg-cairo-draw.h"
#include "rsvg-cairo-clip.h"
#include "rsvg-cairo-render.h"
#include "rsvg-styles.h"
#include "rsvg-path-builder.h"
#include "rsvg-structure.h"
#include <math.h>
#include <string.h>
#include <pango/pangocairo.h>
typedef struct RsvgCairoClipRender RsvgCairoClipRender;
struct RsvgCairoClipRender {
RsvgCairoRender super;
RsvgCairoRender *parent;
};
#define RSVG_CAIRO_CLIP_RENDER(render) (_RSVG_RENDER_CIC ((render), RSVG_RENDER_TYPE_CAIRO_CLIP, RsvgCairoClipRender))
static void
rsvg_cairo_clip_render_pango_layout (RsvgDrawingCtx * ctx, PangoLayout * layout, double x, double y)
{
RsvgCairoClipRender *render = RSVG_CAIRO_CLIP_RENDER (ctx->render);
RsvgCairoRender *cairo_render = &render->super;
cairo_matrix_t affine;
PangoGravity gravity = pango_context_get_gravity (pango_layout_get_context (layout));
double rotation;
affine = rsvg_drawing_ctx_get_current_state_affine (ctx);
rsvg_drawing_ctx_set_affine_on_cr (ctx, cairo_render->cr, &affine);
rotation = pango_gravity_to_rotation (gravity);
cairo_save (cairo_render->cr);
cairo_move_to (cairo_render->cr, x, y);
if (rotation != 0.)
cairo_rotate (cairo_render->cr, -rotation);
pango_cairo_update_layout (cairo_render->cr, layout);
pango_cairo_layout_path (cairo_render->cr, layout);
cairo_restore (cairo_render->cr);
}
static void
rsvg_cairo_clip_render_path_builder (RsvgDrawingCtx * ctx, RsvgPathBuilder *builder)
{
rsvg_draw_path_builder (ctx, builder, TRUE);
}
static void
rsvg_cairo_clip_render_surface (RsvgDrawingCtx *ctx,
cairo_surface_t *surface,
double src_x,
double src_y,
double w,
double h)
{
}
static void
rsvg_cairo_clip_render_free (RsvgRender * self)
{
RsvgCairoClipRender *clip_render = RSVG_CAIRO_CLIP_RENDER (self);
g_free (clip_render);
}
static void
rsvg_cairo_clip_push_discrete_layer (RsvgDrawingCtx * ctx)
{
}
static void
rsvg_cairo_clip_pop_discrete_layer (RsvgDrawingCtx * ctx)
{
}
static void
rsvg_cairo_clip_add_clipping_rect (RsvgDrawingCtx * ctx, double x, double y, double w, double h)
{
}
static RsvgRender *
rsvg_cairo_clip_render_new (cairo_t *cr, RsvgCairoRender *parent)
{
RsvgCairoClipRender *clip_render = g_new0 (RsvgCairoClipRender, 1);
RsvgCairoRender *cairo_render = &clip_render->super;
RsvgRender *render = &cairo_render->super;
g_assert (parent->super.type == RSVG_RENDER_TYPE_CAIRO);
render->type = RSVG_RENDER_TYPE_CAIRO_CLIP;
render->free = rsvg_cairo_clip_render_free;
render->set_affine_on_cr = rsvg_cairo_set_affine_on_cr;
render->get_pango_context = rsvg_cairo_get_pango_context;
render->render_pango_layout = rsvg_cairo_clip_render_pango_layout;
render->render_path_builder = rsvg_cairo_clip_render_path_builder;
render->render_surface = rsvg_cairo_clip_render_surface;
render->pop_discrete_layer = rsvg_cairo_clip_pop_discrete_layer;
render->push_discrete_layer = rsvg_cairo_clip_push_discrete_layer;
render->add_clipping_rect = rsvg_cairo_clip_add_clipping_rect;
render->get_surface_of_node = NULL;
render->insert_bbox = rsvg_cairo_insert_bbox;
cairo_render->initial_cr = parent->initial_cr;
cairo_render->cr = cr;
cairo_render->width = parent->width;
cairo_render->height = parent->height;
cairo_render->offset_x = parent->offset_x;
cairo_render->offset_y = parent->offset_y;
cairo_render->cr_stack = NULL;
cairo_render->bbox = parent->bbox;
cairo_render->bb_stack = NULL;
/* We don't copy or ref the following two; we just share them */
#ifdef HAVE_PANGO_FT2
cairo_render->font_config_for_testing = parent->font_config_for_testing;
cairo_render->font_map_for_testing = parent->font_map_for_testing;
#endif
clip_render->parent = parent;
return render;
}
void
rsvg_cairo_clip (RsvgDrawingCtx * ctx, RsvgNode *node_clip_path, RsvgBbox * bbox)
{
RsvgCairoClipRender *clip_render;
RsvgCairoRender *save = RSVG_CAIRO_RENDER (ctx->render);
cairo_matrix_t affinesave;
RsvgState *clip_path_state;
cairo_t *cr;
RsvgCoordUnits clip_units;
g_assert (rsvg_node_get_type (node_clip_path) == RSVG_NODE_TYPE_CLIP_PATH);
clip_units = rsvg_node_clip_path_get_units (node_clip_path);
cr = save->cr;
clip_render = RSVG_CAIRO_CLIP_RENDER (rsvg_cairo_clip_render_new (cr, save));
ctx->render = &clip_render->super.super;
clip_path_state = rsvg_node_get_state (node_clip_path);
/* Horribly dirty hack to have the bbox premultiplied to everything */
if (clip_units == objectBoundingBox) {
cairo_matrix_t bbtransform;
cairo_matrix_init (&bbtransform,
bbox->rect.width,
0,
0,
bbox->rect.height,
bbox->rect.x,
bbox->rect.y);
affinesave = clip_path_state->affine;
cairo_matrix_multiply (&clip_path_state->affine, &bbtransform, &clip_path_state->affine);
}
rsvg_state_push (ctx);
rsvg_node_draw_children (node_clip_path, ctx, 0);
rsvg_state_pop (ctx);
if (clip_units == objectBoundingBox)
clip_path_state->affine = affinesave;
g_assert (clip_render->super.cr_stack == NULL);
g_assert (clip_render->super.bb_stack == NULL);
g_assert (clip_render->super.surfaces_stack == NULL);
g_free (ctx->render);
cairo_clip (cr);
ctx->render = &save->super;
}
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