diff options
Diffstat (limited to 'image/gif.c')
-rw-r--r-- | image/gif.c | 455 |
1 files changed, 0 insertions, 455 deletions
diff --git a/image/gif.c b/image/gif.c deleted file mode 100644 index 878a42a3c..000000000 --- a/image/gif.c +++ /dev/null @@ -1,455 +0,0 @@ -/* - * Copyright 2003 John M Bell <jmb202@ecs.soton.ac.uk> - * Copyright 2004 Richard Wilson <not_ginger_matt@users.sourceforge.net> - * Copyright 2008 Sean Fox <dyntryx@gmail.com> - * - * 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/gif implementation - * - * All GIFs are dynamically decompressed using the routines that gifread.c - * provides. Whilst this allows support for progressive decoding, it is - * not implemented here as NetSurf currently does not provide such support. - * - * [rjw] - Sun 4th April 2004 - */ - -#include <assert.h> -#include <string.h> -#include <stdbool.h> -#include <stdlib.h> -#include <libnsgif.h> - -#include "utils/utils.h" -#include "utils/messages.h" -#include "utils/nsoption.h" -#include "content/content_protected.h" -#include "desktop/gui_misc.h" -#include "desktop/gui_internal.h" - -#include "image/image.h" -#include "image/bitmap.h" -#include "image/gif.h" - -typedef struct nsgif_content { - struct content base; - - struct gif_animation *gif; /**< GIF animation data */ - int current_frame; /**< current frame to display [0...(max-1)] */ -} nsgif_content; - - -/** - * Callback for libnsgif; forwards the call to bitmap_create() - * - * \param width width of image in pixels - * \param height width of image in pixels - * \return an opaque struct bitmap, or NULL on memory exhaustion - */ -static void *nsgif_bitmap_create(int width, int height) -{ - return guit->bitmap->create(width, height, BITMAP_NEW); -} - - -static nserror nsgif_create_gif_data(nsgif_content *c) -{ - union content_msg_data msg_data; - gif_bitmap_callback_vt gif_bitmap_callbacks = { - .bitmap_create = nsgif_bitmap_create, - .bitmap_destroy = guit->bitmap->destroy, - .bitmap_get_buffer = guit->bitmap->get_buffer, - .bitmap_set_opaque = guit->bitmap->set_opaque, - .bitmap_test_opaque = guit->bitmap->test_opaque, - .bitmap_modified = guit->bitmap->modified - }; - - /* Initialise our data structure */ - c->gif = calloc(sizeof(gif_animation), 1); - if (c->gif == NULL) { - msg_data.error = messages_get("NoMemory"); - content_broadcast(&c->base, CONTENT_MSG_ERROR, msg_data); - return NSERROR_NOMEM; - } - gif_create(c->gif, &gif_bitmap_callbacks); - return NSERROR_OK; -} - - - -static nserror nsgif_create(const content_handler *handler, - lwc_string *imime_type, const struct http_parameter *params, - llcache_handle *llcache, const char *fallback_charset, - bool quirks, struct content **c) -{ - nsgif_content *result; - nserror error; - - result = calloc(1, sizeof(nsgif_content)); - if (result == NULL) - return NSERROR_NOMEM; - - error = content__init(&result->base, handler, imime_type, params, - llcache, fallback_charset, quirks); - if (error != NSERROR_OK) { - free(result); - return error; - } - - error = nsgif_create_gif_data(result); - if (error != NSERROR_OK) { - free(result); - return error; - } - - *c = (struct content *) result; - - return NSERROR_OK; -} - -/** - * Performs any necessary animation. - * - * \param p The content to animate -*/ -static void nsgif_animate(void *p) -{ - nsgif_content *gif = p; - union content_msg_data data; - int delay; - int f; - - /* Advance by a frame, updating the loop count accordingly */ - gif->current_frame++; - if (gif->current_frame == (int)gif->gif->frame_count_partial) { - gif->current_frame = 0; - - /* A loop count of 0 has a special meaning of infinite */ - if (gif->gif->loop_count != 0) { - gif->gif->loop_count--; - if (gif->gif->loop_count == 0) { - gif->current_frame = - gif->gif->frame_count_partial - 1; - gif->gif->loop_count = -1; - } - } - } - - /* Continue animating if we should */ - if (gif->gif->loop_count >= 0) { - delay = gif->gif->frames[gif->current_frame].frame_delay; - if (delay < nsoption_int(minimum_gif_delay)) - delay = nsoption_int(minimum_gif_delay); - guit->misc->schedule(delay * 10, nsgif_animate, gif); - } - - if ((!nsoption_bool(animate_images)) || - (!gif->gif->frames[gif->current_frame].display)) { - return; - } - - /* area within gif to redraw */ - f = gif->current_frame; - data.redraw.x = gif->gif->frames[f].redraw_x; - data.redraw.y = gif->gif->frames[f].redraw_y; - data.redraw.width = gif->gif->frames[f].redraw_width; - data.redraw.height = gif->gif->frames[f].redraw_height; - - /* redraw background (true) or plot on top (false) */ - if (gif->current_frame > 0) { - data.redraw.full_redraw = - gif->gif->frames[f - 1].redraw_required; - /* previous frame needed clearing: expand the redraw area to - * cover it */ - if (data.redraw.full_redraw) { - if (data.redraw.x > - (int)(gif->gif->frames[f - 1].redraw_x)) { - data.redraw.width += data.redraw.x - - gif->gif->frames[f - 1].redraw_x; - data.redraw.x = - gif->gif->frames[f - 1].redraw_x; - } - if (data.redraw.y > - (int)(gif->gif->frames[f - 1].redraw_y)) { - data.redraw.height += (data.redraw.y - - gif->gif->frames[f - 1].redraw_y); - data.redraw.y = - gif->gif->frames[f - 1].redraw_y; - } - if ((int)(gif->gif->frames[f - 1].redraw_x + - gif->gif->frames[f - 1].redraw_width) > - (data.redraw.x + data.redraw.width)) - data.redraw.width = - gif->gif->frames[f - 1].redraw_x - - data.redraw.x + - gif->gif->frames[f - 1].redraw_width; - if ((int)(gif->gif->frames[f - 1].redraw_y + - gif->gif->frames[f - 1].redraw_height) > - (data.redraw.y + data.redraw.height)) - data.redraw.height = - gif->gif->frames[f - 1].redraw_y - - data.redraw.y + - gif->gif->frames[f - 1].redraw_height; - } - } else { - /* do advanced check */ - if ((data.redraw.x == 0) && (data.redraw.y == 0) && - (data.redraw.width == (int)(gif->gif->width)) && - (data.redraw.height == (int)(gif->gif->height))) { - data.redraw.full_redraw = !gif->gif->frames[f].opaque; - } else { - data.redraw.full_redraw = true; - data.redraw.x = 0; - data.redraw.y = 0; - data.redraw.width = gif->gif->width; - data.redraw.height = gif->gif->height; - } - } - - /* other data */ - data.redraw.object = (struct content *) gif; - data.redraw.object_x = 0; - data.redraw.object_y = 0; - data.redraw.object_width = gif->base.width; - data.redraw.object_height = gif->base.height; - - content_broadcast(&gif->base, CONTENT_MSG_REDRAW, data); -} - -static bool nsgif_convert(struct content *c) -{ - nsgif_content *gif = (nsgif_content *) c; - int res; - union content_msg_data msg_data; - const char *data; - unsigned long size; - char *title; - - /* Get the animation */ - data = content__get_source_data(c, &size); - - /* Initialise the GIF */ - do { - res = gif_initialise(gif->gif, size, (unsigned char *) data); - if (res != GIF_OK && res != GIF_WORKING && - res != GIF_INSUFFICIENT_FRAME_DATA) { - switch (res) { - case GIF_FRAME_DATA_ERROR: - case GIF_INSUFFICIENT_DATA: - case GIF_DATA_ERROR: - msg_data.error = messages_get("BadGIF"); - break; - case GIF_INSUFFICIENT_MEMORY: - msg_data.error = messages_get("NoMemory"); - break; - } - content_broadcast(c, CONTENT_MSG_ERROR, msg_data); - return false; - } - } while (res != GIF_OK && res != GIF_INSUFFICIENT_FRAME_DATA); - - /* Abort on bad GIFs */ - if ((gif->gif->frame_count_partial == 0) || (gif->gif->width == 0) || - (gif->gif->height == 0)) { - msg_data.error = messages_get("BadGIF"); - content_broadcast(c, CONTENT_MSG_ERROR, msg_data); - return false; - } - - /* Store our content width, height and calculate size */ - c->width = gif->gif->width; - c->height = gif->gif->height; - c->size += (gif->gif->width * gif->gif->height * 4) + 16 + 44; - - /* set title text */ - title = messages_get_buff("GIFTitle", - nsurl_access_leaf(llcache_handle_get_url(c->llcache)), - c->width, c->height); - if (title != NULL) { - content__set_title(c, title); - free(title); - } - - /* Schedule the animation if we have one */ - gif->current_frame = 0; - if (gif->gif->frame_count_partial > 1) - guit->misc->schedule(gif->gif->frames[0].frame_delay * 10, - nsgif_animate, - c); - - /* Exit as a success */ - content_set_ready(c); - content_set_done(c); - - /* Done: update status bar */ - content_set_status(c, ""); - return true; -} - - -/** - * Updates the GIF bitmap to display the current frame - * - * \param gif The gif context to update. - * \return GIF_OK on success else apropriate error code. - */ -static gif_result nsgif_get_frame(nsgif_content *gif) -{ - int previous_frame, current_frame, frame; - gif_result res = GIF_OK; - - current_frame = gif->current_frame; - if (!nsoption_bool(animate_images)) { - current_frame = 0; - } - - if (current_frame < gif->gif->decoded_frame) { - previous_frame = 0; - } else { - previous_frame = gif->gif->decoded_frame + 1; - } - - for (frame = previous_frame; frame <= current_frame; frame++) { - res = gif_decode_frame(gif->gif, frame); - } - - return res; -} - -static bool nsgif_redraw(struct content *c, struct content_redraw_data *data, - const struct rect *clip, const struct redraw_context *ctx) -{ - nsgif_content *gif = (nsgif_content *) c; - - if (gif->current_frame != gif->gif->decoded_frame) { - if (nsgif_get_frame(gif) != GIF_OK) { - return false; - } - } - - return image_bitmap_plot(gif->gif->frame_image, data, clip, ctx); -} - - -static void nsgif_destroy(struct content *c) -{ - nsgif_content *gif = (nsgif_content *) c; - - /* Free all the associated memory buffers */ - guit->misc->schedule(-1, nsgif_animate, c); - gif_finalise(gif->gif); - free(gif->gif); -} - - -static nserror nsgif_clone(const struct content *old, struct content **newc) -{ - nsgif_content *gif; - nserror error; - - gif = calloc(1, sizeof(nsgif_content)); - if (gif == NULL) - return NSERROR_NOMEM; - - error = content__clone(old, &gif->base); - if (error != NSERROR_OK) { - content_destroy(&gif->base); - return error; - } - - /* Simply replay creation and conversion of content */ - error = nsgif_create_gif_data(gif); - if (error != NSERROR_OK) { - content_destroy(&gif->base); - return error; - } - - if (old->status == CONTENT_STATUS_READY || - old->status == CONTENT_STATUS_DONE) { - if (nsgif_convert(&gif->base) == false) { - content_destroy(&gif->base); - return NSERROR_CLONE_FAILED; - } - } - - *newc = (struct content *) gif; - - return NSERROR_OK; -} - -static void nsgif_add_user(struct content *c) -{ - nsgif_content *gif = (nsgif_content *) c; - - /* Ensure this content has already been converted. - * If it hasn't, the animation will start at the conversion phase instead. */ - if (gif->gif == NULL) return; - - if (content_count_users(c) == 1) { - /* First user, and content already converted, so start the animation. */ - if (gif->gif->frame_count_partial > 1) { - guit->misc->schedule(gif->gif->frames[0].frame_delay * 10, - nsgif_animate, c); - } - } -} - -static void nsgif_remove_user(struct content *c) -{ - if (content_count_users(c) == 1) { - /* Last user is about to be removed from this content, so stop the animation. */ - guit->misc->schedule(-1, nsgif_animate, c); - } -} - -static void *nsgif_get_internal(const struct content *c, void *context) -{ - nsgif_content *gif = (nsgif_content *) c; - - if (gif->current_frame != gif->gif->decoded_frame) { - if (nsgif_get_frame(gif) != GIF_OK) - return NULL; - } - - return gif->gif->frame_image; -} - -static content_type nsgif_content_type(void) -{ - return CONTENT_IMAGE; -} - -static const content_handler nsgif_content_handler = { - .create = nsgif_create, - .data_complete = nsgif_convert, - .destroy = nsgif_destroy, - .redraw = nsgif_redraw, - .clone = nsgif_clone, - .add_user = nsgif_add_user, - .remove_user = nsgif_remove_user, - .get_internal = nsgif_get_internal, - .type = nsgif_content_type, - .no_share = false, -}; - -static const char *nsgif_types[] = { - "image/gif" -}; - -CONTENT_FACTORY_REGISTER_TYPES(nsgif, nsgif_types, nsgif_content_handler); |