| 0,0 → 1,322 |
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| /* |
| * Copyright 2007 Rob Kendrick <rjek@netsurf-browser.org> |
| * |
| * 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 handler for image/svg using librsvg (implementation). |
| * |
| * SVG files are rendered to a NetSurf bitmap by creating a Cairo rendering |
| * surface (content_rsvg_data.cs) over the bitmap's data, creating a Cairo |
| * drawing context using that surface, and then passing that drawing context |
| * to librsvg which then uses Cairo calls to plot the graphic to the bitmap. |
| * We store this in content->bitmap, and then use the usual bitmap plotter |
| * function to render it for redraw requests. |
| */ |
| |
| #include <stdbool.h> |
| #include <assert.h> |
| #include <string.h> |
| #include <sys/types.h> |
| |
| #include <librsvg/rsvg.h> |
| #include <librsvg/rsvg-cairo.h> |
| |
| #include "content/content_protected.h" |
| #include "desktop/plotters.h" |
| #include "image/bitmap.h" |
| #include "utils/log.h" |
| #include "utils/utils.h" |
| #include "utils/messages.h" |
| |
| #include "image/rsvg.h" |
| |
| typedef struct rsvg_content { |
| struct content base; |
| |
| RsvgHandle *rsvgh; /**< Context handle for RSVG renderer */ |
| cairo_surface_t *cs; /**< The surface built inside a nsbitmap */ |
| cairo_t *ct; /**< Cairo drawing context */ |
| struct bitmap *bitmap; /**< Created NetSurf bitmap */ |
| } rsvg_content; |
| |
| static nserror rsvg_create_svg_data(rsvg_content *c) |
| { |
| union content_msg_data msg_data; |
| |
| c->rsvgh = NULL; |
| c->cs = NULL; |
| c->ct = NULL; |
| c->bitmap = NULL; |
| |
| if ((c->rsvgh = rsvg_handle_new()) == NULL) { |
| LOG(("rsvg_handle_new() returned NULL.")); |
| msg_data.error = messages_get("NoMemory"); |
| content_broadcast(&c->base, CONTENT_MSG_ERROR, msg_data); |
| return NSERROR_NOMEM; |
| } |
| |
| return NSERROR_OK; |
| } |
| |
| |
| static nserror rsvg_create(const content_handler *handler, |
| lwc_string *imime_type, const http_parameter *params, |
| llcache_handle *llcache, const char *fallback_charset, |
| bool quirks, struct content **c) |
| { |
| rsvg_content *svg; |
| nserror error; |
| |
| svg = calloc(1, sizeof(rsvg_content)); |
| if (svg == NULL) |
| return NSERROR_NOMEM; |
| |
| error = content__init(&svg->base, handler, imime_type, params, |
| llcache, fallback_charset, quirks); |
| if (error != NSERROR_OK) { |
| free(svg); |
| return error; |
| } |
| |
| error = rsvg_create_svg_data(svg); |
| if (error != NSERROR_OK) { |
| free(svg); |
| return error; |
| } |
| |
| *c = (struct content *) svg; |
| |
| return NSERROR_OK; |
| } |
| |
| |
| static bool rsvg_process_data(struct content *c, const char *data, |
| unsigned int size) |
| { |
| rsvg_content *d = (rsvg_content *) c; |
| union content_msg_data msg_data; |
| GError *err = NULL; |
| |
| if (rsvg_handle_write(d->rsvgh, (const guchar *)data, (gsize)size, |
| &err) == FALSE) { |
| LOG(("rsvg_handle_write returned an error: %s", err->message)); |
| msg_data.error = err->message; |
| content_broadcast(c, CONTENT_MSG_ERROR, msg_data); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /** Convert Cairo's ARGB output to NetSurf's favoured ABGR format. It converts |
| * the data in-place. |
| * |
| * \param pixels Pixel data, in the form of ARGB. This will |
| * be overwritten with new data in the form of ABGR. |
| * \param width Width of the bitmap |
| * \param height Height of the bitmap |
| * \param rowstride Number of bytes to skip after each row (this |
| * implementation requires this to be a multiple of 4.) |
| */ |
| static inline void rsvg_argb_to_abgr(uint8_t *pixels, |
| int width, int height, size_t rowstride) |
| { |
| uint8_t *p = pixels; |
| |
| for (int y = 0; y < height; y++) { |
| for (int x = 0; x < width; x++) { |
| /* Swap R and B */ |
| const uint8_t r = p[x+3]; |
| |
| p[x+3] = p[x]; |
| |
| p[x] = r; |
| } |
| |
| p += rowstride; |
| } |
| } |
| |
| static bool rsvg_convert(struct content *c) |
| { |
| rsvg_content *d = (rsvg_content *) c; |
| union content_msg_data msg_data; |
| RsvgDimensionData rsvgsize; |
| GError *err = NULL; |
| |
| if (rsvg_handle_close(d->rsvgh, &err) == FALSE) { |
| LOG(("rsvg_handle_close returned an error: %s", err->message)); |
| msg_data.error = err->message; |
| content_broadcast(c, CONTENT_MSG_ERROR, msg_data); |
| return false; |
| } |
| |
| assert(err == NULL); |
| |
| /* we should now be able to query librsvg for the natural size of the |
| * graphic, so we can create our bitmap. |
| */ |
| |
| rsvg_handle_get_dimensions(d->rsvgh, &rsvgsize); |
| c->width = rsvgsize.width; |
| c->height = rsvgsize.height; |
| |
| if ((d->bitmap = bitmap_create(c->width, c->height, |
| BITMAP_NEW)) == NULL) { |
| LOG(("Failed to create bitmap for rsvg render.")); |
| msg_data.error = messages_get("NoMemory"); |
| content_broadcast(c, CONTENT_MSG_ERROR, msg_data); |
| return false; |
| } |
| |
| if ((d->cs = cairo_image_surface_create_for_data( |
| (unsigned char *)bitmap_get_buffer(d->bitmap), |
| CAIRO_FORMAT_ARGB32, |
| c->width, c->height, |
| bitmap_get_rowstride(d->bitmap))) == NULL) { |
| LOG(("Failed to create Cairo image surface for rsvg render.")); |
| msg_data.error = messages_get("NoMemory"); |
| content_broadcast(c, CONTENT_MSG_ERROR, msg_data); |
| return false; |
| } |
| |
| if ((d->ct = cairo_create(d->cs)) == NULL) { |
| LOG(("Failed to create Cairo drawing context for rsvg render.")); |
| msg_data.error = messages_get("NoMemory"); |
| content_broadcast(c, CONTENT_MSG_ERROR, msg_data); |
| return false; |
| } |
| |
| rsvg_handle_render_cairo(d->rsvgh, d->ct); |
| rsvg_argb_to_abgr(bitmap_get_buffer(d->bitmap), |
| c->width, c->height, |
| bitmap_get_rowstride(d->bitmap)); |
| |
| bitmap_modified(d->bitmap); |
| content_set_ready(c); |
| content_set_done(c); |
| /* Done: update status bar */ |
| content_set_status(c, ""); |
| |
| return true; |
| } |
| |
| static bool rsvg_redraw(struct content *c, struct content_redraw_data *data, |
| const struct rect *clip, const struct redraw_context *ctx) |
| { |
| rsvg_content *rsvgcontent = (rsvg_content *) c; |
| bitmap_flags_t flags = BITMAPF_NONE; |
| |
| assert(rsvgcontent->bitmap != NULL); |
| |
| if (data->repeat_x) |
| flags |= BITMAPF_REPEAT_X; |
| if (data->repeat_y) |
| flags |= BITMAPF_REPEAT_Y; |
| |
| return ctx->plot->bitmap(data->x, data->y, data->width, data->height, |
| rsvgcontent->bitmap, data->background_colour, flags); |
| } |
| |
| static void rsvg_destroy(struct content *c) |
| { |
| rsvg_content *d = (rsvg_content *) c; |
| |
| if (d->bitmap != NULL) bitmap_destroy(d->bitmap); |
| if (d->rsvgh != NULL) g_object_unref(d->rsvgh); |
| if (d->ct != NULL) cairo_destroy(d->ct); |
| if (d->cs != NULL) cairo_surface_destroy(d->cs); |
| |
| return; |
| } |
| |
| static nserror rsvg_clone(const struct content *old, struct content **newc) |
| { |
| rsvg_content *svg; |
| nserror error; |
| const char *data; |
| unsigned long size; |
| |
| svg = calloc(1, sizeof(rsvg_content)); |
| if (svg == NULL) |
| return NSERROR_NOMEM; |
| |
| error = content__clone(old, &svg->base); |
| if (error != NSERROR_OK) { |
| content_destroy(&svg->base); |
| return error; |
| } |
| |
| /* Simply replay create/process/convert */ |
| error = rsvg_create_svg_data(svg); |
| if (error != NSERROR_OK) { |
| content_destroy(&svg->base); |
| return error; |
| } |
| |
| data = content__get_source_data(&svg->base, &size); |
| if (size > 0) { |
| if (rsvg_process_data(&svg->base, data, size) == false) { |
| content_destroy(&svg->base); |
| return NSERROR_NOMEM; |
| } |
| } |
| |
| if (old->status == CONTENT_STATUS_READY || |
| old->status == CONTENT_STATUS_DONE) { |
| if (rsvg_convert(&svg->base) == false) { |
| content_destroy(&svg->base); |
| return NSERROR_CLONE_FAILED; |
| } |
| } |
| |
| *newc = (struct content *) svg; |
| |
| return NSERROR_OK; |
| } |
| |
| static void *rsvg_get_internal(const struct content *c, void *context) |
| { |
| rsvg_content *d = (rsvg_content *) c; |
| |
| return d->bitmap; |
| } |
| |
| static content_type rsvg_content_type(void) |
| { |
| return CONTENT_IMAGE; |
| } |
| |
| static const content_handler rsvg_content_handler = { |
| .create = rsvg_create, |
| .process_data = rsvg_process_data, |
| .data_complete = rsvg_convert, |
| .destroy = rsvg_destroy, |
| .redraw = rsvg_redraw, |
| .clone = rsvg_clone, |
| .get_internal = rsvg_get_internal, |
| .type = rsvg_content_type, |
| .no_share = false, |
| }; |
| |
| static const char *rsvg_types[] = { |
| "image/svg", |
| "image/svg+xml" |
| }; |
| |
| CONTENT_FACTORY_REGISTER_TYPES(nsrsvg, rsvg_types, rsvg_content_handler); |
| |