netsurf/image/svg.c

197 lines
4.3 KiB
C

/*
* Copyright 2007-2008 James Bursa <bursa@users.sourceforge.net>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* NetSurf 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file
* Content for image/svg (implementation).
*/
#include "utils/config.h"
#ifdef WITH_NS_SVG
#include <assert.h>
#include <string.h>
#include <svgtiny.h>
#include "content/content_protected.h"
#include "css/css.h"
#include "desktop/plotters.h"
#include "image/svg.h"
#include "utils/messages.h"
#include "utils/utils.h"
/**
* Create a CONTENT_SVG.
*/
bool svg_create(struct content *c, const struct http_parameter *params)
{
union content_msg_data msg_data;
c->data.svg.diagram = svgtiny_create();
if (!c->data.svg.diagram)
goto no_memory;
c->data.svg.done_parse = false;
return true;
no_memory:
msg_data.error = messages_get("NoMemory");
content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
return false;
}
/**
* Convert a CONTENT_SVG for display.
*/
bool svg_convert(struct content *c)
{
/*c->title = malloc(100);
if (c->title)
snprintf(c->title, 100, messages_get("svgTitle"),
width, height, c->source_size);*/
//c->size += ?;
c->status = CONTENT_STATUS_DONE;
/* Done: update status bar */
content_set_status(c, "");
return true;
}
/**
* Reformat a CONTENT_SVG.
*/
void svg_reformat(struct content *c, int width, int height)
{
const char *source_data;
unsigned long source_size;
assert(c->data.svg.diagram);
if (c->data.svg.done_parse == false) {
source_data = content__get_source_data(c, &source_size);
svgtiny_parse(c->data.svg.diagram, source_data, source_size,
content__get_url(c), width, height);
c->data.svg.done_parse = true;
}
c->width = c->data.svg.diagram->width;
c->height = c->data.svg.diagram->height;
}
/**
* Redraw a CONTENT_SVG.
*/
bool svg_redraw(struct content *c, int x, int y,
int width, int height,
int clip_x0, int clip_y0, int clip_x1, int clip_y1,
float scale, colour background_colour)
{
float transform[6];
struct svgtiny_diagram *diagram = c->data.svg.diagram;
bool ok;
int px, py;
unsigned int i;
plot_font_style_t fstyle = *plot_style_font;
assert(diagram);
transform[0] = (float) width / (float) c->width;
transform[1] = 0;
transform[2] = 0;
transform[3] = (float) height / (float) c->height;
transform[4] = x;
transform[5] = y;
#define BGR(c) ((c) == svgtiny_TRANSPARENT ? NS_TRANSPARENT : ((svgtiny_RED((c))) | (svgtiny_GREEN((c)) << 8) | (svgtiny_BLUE((c)) << 16)))
for (i = 0; i != diagram->shape_count; i++) {
if (diagram->shape[i].path) {
ok = plot.path(diagram->shape[i].path,
diagram->shape[i].path_length,
BGR(diagram->shape[i].fill),
diagram->shape[i].stroke_width,
BGR(diagram->shape[i].stroke),
transform);
if (!ok)
return false;
} else if (diagram->shape[i].text) {
px = transform[0] * diagram->shape[i].text_x +
transform[2] * diagram->shape[i].text_y +
transform[4];
py = transform[1] * diagram->shape[i].text_x +
transform[3] * diagram->shape[i].text_y +
transform[5];
fstyle.background = 0xffffff;
fstyle.foreground = 0x000000;
ok = plot.text(px, py,
diagram->shape[i].text,
strlen(diagram->shape[i].text),
&fstyle);
if (!ok)
return false;
}
}
#undef BGR
return true;
}
/**
* Destroy a CONTENT_SVG and free all resources it owns.
*/
void svg_destroy(struct content *c)
{
if (c->data.svg.diagram)
svgtiny_free(c->data.svg.diagram);
}
bool svg_clone(const struct content *old, struct content *new_content)
{
/* Simply replay create/convert */
if (svg_create(new_content, NULL) == false)
return false;
if (old->status == CONTENT_STATUS_READY ||
old->status == CONTENT_STATUS_DONE) {
if (svg_convert(new_content) == false)
return false;
}
return true;
}
#endif /* WITH_NS_SVG */