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/* vim: set sw=4: -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/*
rsvg-cairo-render.c: The cairo backend plugin
Copyright (C) 2005 Dom Lachowicz <cinamod@hotmail.com>
Caleb Moore <c.moore@student.unsw.edu.au>
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>
*/
#include <stdio.h>
#include <stdlib.h>
#include <glib/gslist.h>
#include <math.h>
#include <string.h>
#include "rsvg.h"
#include "rsvg-cairo.h"
#include "rsvg-cairo-draw.h"
#include "rsvg-cairo-render.h"
#include "rsvg-styles.h"
#include "rsvg-structure.h"
static void
rsvg_cairo_render_free (RsvgRender * self)
{
RsvgCairoRender * me = (RsvgCairoRender *)self;
/* TODO */
g_free (me);
}
RsvgCairoRender *
rsvg_cairo_render_new(cairo_t * cr, double width, double height)
{
RsvgCairoRender * cairo_render = g_new0(RsvgCairoRender, 1);
cairo_render->super.free = rsvg_cairo_render_free;
cairo_render->super.render_image = rsvg_cairo_render_image;
cairo_render->super.render_path = rsvg_cairo_render_path;
cairo_render->super.pop_discrete_layer = rsvg_cairo_pop_discrete_layer;
cairo_render->super.push_discrete_layer = rsvg_cairo_push_discrete_layer;
cairo_render->super.add_clipping_rect = rsvg_cairo_add_clipping_rect;
cairo_render->super.get_image_of_node = rsvg_cairo_get_image_of_node;
cairo_render->width = width;
cairo_render->height = height;
cairo_render->cr = cr;
cairo_render->cr_stack = NULL;
cairo_render->bb_stack = NULL;
cairo_render->pixbuf_stack = NULL;
return cairo_render;
}
static RsvgDrawingCtx *
rsvg_cairo_new_drawing_ctx (cairo_t *cr, RsvgHandle *handle)
{
RsvgDimensionData data;
RsvgDrawingCtx * draw;
RsvgState * state;
double affine[6];
rsvg_handle_get_dimensions(handle, &data);
if(data.width == 0 || data.height == 0)
return NULL;
draw = g_new(RsvgDrawingCtx, 1);
draw->render = (RsvgRender *) rsvg_cairo_render_new (cr, data.width, data.height);
if(!draw->render)
return NULL;
draw->state = NULL;
/* should this be G_ALLOC_ONLY? */
draw->state_allocator = g_mem_chunk_create (RsvgState, 256, G_ALLOC_AND_FREE);
draw->defs = handle->priv->defs;
draw->base_uri = g_strdup(handle->priv->base_uri);
draw->dpi_x = handle->priv->dpi_x;
draw->dpi_y = handle->priv->dpi_y;
draw->vb.w = data.em;
draw->vb.h = data.ex;
draw->pango_context = NULL;
draw->drawsub_stack = NULL;
rsvg_state_push(draw);
state = rsvg_state_current(draw);
affine[0] = data.width / data.em;
affine[1] = 0;
affine[2] = 0;
affine[3] = data.height / data.ex;
affine[4] = 0;
affine[5] = 0;
_rsvg_affine_multiply(state->affine, affine,
state->affine);
rsvg_bbox_init(&((RsvgCairoRender *)draw->render)->bbox,
state->affine);
return draw;
}
/**
* rsvg_handle_render_cairo_sub
* @handle: A RsvgHandle
* @cr: A Cairo renderer
* @id: An element's id within the SVG, or %NULL to render the whole SVG
*
* Draws a subset of a SVG to a Cairo surface
*
* Since: 2.14
*/
void
rsvg_handle_render_cairo_sub (RsvgHandle *handle, cairo_t *cr, const char * id)
{
RsvgDrawingCtx * draw;
RsvgNode * drawsub = NULL;
g_return_if_fail (handle != NULL);
if (!handle->priv->finished)
return;
draw = rsvg_cairo_new_drawing_ctx (cr, handle);
if (!draw)
return;
if(id && *id)
drawsub = rsvg_defs_lookup (handle->priv->defs, id);
while (drawsub != NULL){
draw->drawsub_stack = g_slist_prepend(draw->drawsub_stack, drawsub);
drawsub = drawsub->parent;
}
rsvg_state_push(draw);
rsvg_node_draw((RsvgNode *)handle->priv->treebase, draw, 0);
rsvg_state_pop(draw);
rsvg_drawing_ctx_free(draw);
}
/**
* rsvg_handle_render_cairo
* @handle: A RsvgHandle
* @cr: A Cairo renderer
*
* Draws a SVG to a Cairo surface
*
* Since: 2.14
*/
void
rsvg_handle_render_cairo (RsvgHandle *handle, cairo_t *cr)
{
rsvg_handle_render_cairo_sub(handle, cr, NULL);
}
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