355 lines
7.6 KiB
C
355 lines
7.6 KiB
C
/*
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* Copyright 2007-2008 James Bursa <bursa@users.sourceforge.net>
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** \file
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* Content for image/svg (implementation).
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*/
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#include <assert.h>
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#include <limits.h>
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#include <string.h>
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#include <stdlib.h>
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#include <svgtiny.h>
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#include "utils/messages.h"
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#include "utils/utils.h"
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#include "netsurf/plotters.h"
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#include "netsurf/content.h"
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#include "content/content_protected.h"
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#include "image/svg.h"
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typedef struct svg_content {
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struct content base;
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struct svgtiny_diagram *diagram;
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int current_width;
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int current_height;
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} svg_content;
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static nserror svg_create_svg_data(svg_content *c)
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{
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union content_msg_data msg_data;
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c->diagram = svgtiny_create();
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if (c->diagram == NULL)
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goto no_memory;
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c->current_width = INT_MAX;
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c->current_height = INT_MAX;
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return NSERROR_OK;
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no_memory:
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msg_data.error = messages_get("NoMemory");
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content_broadcast(&c->base, CONTENT_MSG_ERROR, msg_data);
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return NSERROR_NOMEM;
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}
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/**
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* Create a CONTENT_SVG.
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*/
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static nserror svg_create(const content_handler *handler,
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lwc_string *imime_type, const struct http_parameter *params,
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struct llcache_handle *llcache, const char *fallback_charset,
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bool quirks, struct content **c)
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{
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svg_content *svg;
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nserror error;
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svg = calloc(1, sizeof(svg_content));
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if (svg == NULL)
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return NSERROR_NOMEM;
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error = content__init(&svg->base, handler, imime_type, params,
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llcache, fallback_charset, quirks);
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if (error != NSERROR_OK) {
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free(svg);
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return error;
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}
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error = svg_create_svg_data(svg);
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if (error != NSERROR_OK) {
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free(svg);
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return error;
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}
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*c = (struct content *) svg;
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return NSERROR_OK;
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}
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/**
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* Convert a CONTENT_SVG for display.
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*/
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static bool svg_convert(struct content *c)
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{
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/*c->title = malloc(100);
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if (c->title)
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snprintf(c->title, 100, messages_get("svgTitle"),
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width, height, c->source_size);*/
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//c->size += ?;
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content_set_ready(c);
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content_set_done(c);
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/* Done: update status bar */
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content_set_status(c, "");
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return true;
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}
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/**
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* Reformat a CONTENT_SVG.
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*/
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static void svg_reformat(struct content *c, int width, int height)
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{
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svg_content *svg = (svg_content *) c;
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const char *source_data;
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unsigned long source_size;
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assert(svg->diagram);
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/* Avoid reformats to same width/height as we already reformatted to */
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if (width != svg->current_width || height != svg->current_height) {
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source_data = content__get_source_data(c, &source_size);
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svgtiny_parse(svg->diagram, source_data, source_size,
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nsurl_access(content_get_url(c)),
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width, height);
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svg->current_width = width;
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svg->current_height = height;
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}
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c->width = svg->diagram->width;
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c->height = svg->diagram->height;
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}
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/**
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* Redraw a CONTENT_SVG.
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*/
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static bool svg_redraw_internal(struct content *c, int x, int y,
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int width, int height, const struct rect *clip,
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const struct redraw_context *ctx, float scale,
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colour background_colour)
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{
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svg_content *svg = (svg_content *) c;
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float transform[6];
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struct svgtiny_diagram *diagram = svg->diagram;
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bool ok;
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int px, py;
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unsigned int i;
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plot_font_style_t fstyle = *plot_style_font;
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assert(diagram);
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transform[0] = (float) width / (float) c->width;
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transform[1] = 0;
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transform[2] = 0;
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transform[3] = (float) height / (float) c->height;
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transform[4] = x;
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transform[5] = y;
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#define BGR(c) ((c) == svgtiny_TRANSPARENT ? NS_TRANSPARENT : \
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((svgtiny_RED((c))) | \
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(svgtiny_GREEN((c)) << 8) | \
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(svgtiny_BLUE((c)) << 16)))
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for (i = 0; i != diagram->shape_count; i++) {
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if (diagram->shape[i].path) {
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ok = ctx->plot->path(diagram->shape[i].path,
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diagram->shape[i].path_length,
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BGR(diagram->shape[i].fill),
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diagram->shape[i].stroke_width,
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BGR(diagram->shape[i].stroke),
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transform);
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if (!ok)
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return false;
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} else if (diagram->shape[i].text) {
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px = transform[0] * diagram->shape[i].text_x +
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transform[2] * diagram->shape[i].text_y +
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transform[4];
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py = transform[1] * diagram->shape[i].text_x +
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transform[3] * diagram->shape[i].text_y +
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transform[5];
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fstyle.background = 0xffffff;
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fstyle.foreground = 0x000000;
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fstyle.size = (8 * FONT_SIZE_SCALE) * scale;
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ok = ctx->plot->text(px, py,
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diagram->shape[i].text,
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strlen(diagram->shape[i].text),
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&fstyle);
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if (!ok)
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return false;
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}
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}
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#undef BGR
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return true;
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}
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/**
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* Redraw a CONTENT_SVG.
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*/
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static bool svg_redraw(struct content *c, struct content_redraw_data *data,
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const struct rect *clip, const struct redraw_context *ctx)
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{
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int x = data->x;
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int y = data->y;
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if ((data->width <= 0) && (data->height <= 0)) {
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/* No point trying to plot SVG if it does not occupy a valid
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* area */
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return true;
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}
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if ((data->repeat_x == false) && (data->repeat_y == false)) {
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/* Simple case: SVG is not tiled */
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return svg_redraw_internal(c, x, y,
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data->width, data->height,
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clip, ctx, data->scale,
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data->background_colour);
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} else {
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/* Tiled redraw required. SVG repeats to extents of clip
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* rectangle, in x, y or both directions */
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int x0, y0, x1, y1;
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/* Find the redraw boundaries to loop within */
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x0 = x;
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if (data->repeat_x) {
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for (; x0 > clip->x0; x0 -= data->width);
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x1 = clip->x1;
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} else {
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x1 = x + 1;
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}
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y0 = y;
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if (data->repeat_y) {
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for (; y0 > clip->y0; y0 -= data->height);
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y1 = clip->y1;
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} else {
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y1 = y + 1;
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}
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/* Repeatedly plot the SVG across the area */
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for (y = y0; y < y1; y += data->height) {
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for (x = x0; x < x1; x += data->width) {
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if (!svg_redraw_internal(c, x, y,
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data->width, data->height,
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clip, ctx, data->scale,
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data->background_colour)) {
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return false;
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}
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}
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}
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}
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return true;
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}
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/**
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* Destroy a CONTENT_SVG and free all resources it owns.
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*/
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static void svg_destroy(struct content *c)
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{
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svg_content *svg = (svg_content *) c;
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if (svg->diagram != NULL)
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svgtiny_free(svg->diagram);
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}
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static nserror svg_clone(const struct content *old, struct content **newc)
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{
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svg_content *svg;
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nserror error;
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svg = calloc(1, sizeof(svg_content));
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if (svg == NULL)
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return NSERROR_NOMEM;
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error = content__clone(old, &svg->base);
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if (error != NSERROR_OK) {
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content_destroy(&svg->base);
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return error;
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}
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/* Simply replay create/convert */
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error = svg_create_svg_data(svg);
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if (error != NSERROR_OK) {
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content_destroy(&svg->base);
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return error;
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}
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if (old->status == CONTENT_STATUS_READY ||
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old->status == CONTENT_STATUS_DONE) {
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if (svg_convert(&svg->base) == false) {
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content_destroy(&svg->base);
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return NSERROR_CLONE_FAILED;
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}
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}
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*newc = (struct content *) svg;
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return NSERROR_OK;
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}
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static content_type svg_content_type(void)
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{
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return CONTENT_IMAGE;
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}
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static const content_handler svg_content_handler = {
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.create = svg_create,
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.data_complete = svg_convert,
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.reformat = svg_reformat,
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.destroy = svg_destroy,
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.redraw = svg_redraw,
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.clone = svg_clone,
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.type = svg_content_type,
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.no_share = true
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};
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static const char *svg_types[] = {
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"image/svg",
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"image/svg+xml"
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};
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CONTENT_FACTORY_REGISTER_TYPES(svg, svg_types, svg_content_handler);
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