mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-11-28 09:13:08 +03:00
132 lines
3.2 KiB
C
132 lines
3.2 KiB
C
/*
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* This file is part of NetSurf, http://netsurf.sourceforge.net/
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* Licensed under the GNU General Public License,
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* http://www.opensource.org/licenses/gpl-license
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* Copyright 2006 Rob Kendrick <rjek@rjek.com>
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "netsurf/utils/log.h"
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#include "netsurf/image/gifread.h"
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#include "netsurf/gtk/gtk_throbber.h"
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#include "netsurf/gtk/gtk_bitmap.h"
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struct nsgtk_throbber *nsgtk_throbber = NULL;
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bool nsgtk_throbber_initialise(const char *fn)
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{
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/* disect the GIF provided by filename in *fn into a series of
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* GdkPixbuf for use later.
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*/
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struct gif_animation *gif; /**< structure for gifread.c */
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struct nsgtk_throbber *throb; /**< structure we generate */
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int i;
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FILE *fh = fopen(fn, "rb");
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if (fh == NULL) {
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LOG(("Unable to open throbber image '%s' for reading!", fn));
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return false;
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}
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gif = (struct gif_animation *)malloc(sizeof(struct gif_animation));
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throb = (struct nsgtk_throbber *)malloc(sizeof(struct nsgtk_throbber));
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/* discover the size of the data file. */
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fseek(fh, 0, SEEK_END);
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gif->buffer_size = ftell(fh);
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fseek(fh, 0, SEEK_SET);
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/* allocate a block of sufficient size, and load the data in. */
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gif->gif_data = (unsigned char *)malloc(gif->buffer_size);
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fread(gif->gif_data, gif->buffer_size, 1, fh);
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fclose(fh);
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/* set current position within GIF file to beginning, in order to
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* signal to gifread that we're brand new.
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*/
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gif->buffer_position = 0;
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/* initialise the gif_animation structure. */
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switch (gif_initialise(gif))
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{
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case GIF_INSUFFICIENT_FRAME_DATA:
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case GIF_FRAME_DATA_ERROR:
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case GIF_INSUFFICIENT_DATA:
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case GIF_DATA_ERROR:
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LOG(("GIF image '%s' appears invalid!", fn));
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free(gif->gif_data);
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free(gif);
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free(throb);
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return false;
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break;
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case GIF_INSUFFICIENT_MEMORY:
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LOG(("Ran out of memory decoding GIF image '%s'!", fn));
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free(gif->gif_data);
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free(gif);
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free(throb);
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return false;
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break;
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}
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throb->nframes = gif->frame_count;
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if (throb->nframes < 2)
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{
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/* we need at least two frames - one for idle, one for active */
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LOG(("Insufficent number of frames in throbber image '%s'!",
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fn));
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LOG(("(GIF contains %d frames, where 2 is a minimum.)",
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throb->nframes));
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free(gif->gif_data);
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free(gif);
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free(throb);
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return false;
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}
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throb->framedata = (GdkPixbuf **)malloc(sizeof(GdkPixbuf *)
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* throb->nframes);
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/* decode each frame in turn, extracting the struct bitmap * for each,
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* and put that in our array of frames.
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*/
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for (i = 0; i < throb->nframes; i++)
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{
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gif_decode_frame(gif, i);
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throb->framedata[i] = gdk_pixbuf_copy(
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gtk_bitmap_get_primary(gif->frame_image));
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}
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gif_finalise(gif);
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free(gif->gif_data);
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free(gif);
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/* debug code: save out each frame as a PNG to make sure decoding is
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* working correctly.
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for (i = 0; i < throb->nframes; i++) {
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char fname[20];
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sprintf(fname, "frame%d.png", i);
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gdk_pixbuf_save(throb->framedata[i], fname, "png", NULL, NULL);
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}
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*/
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nsgtk_throbber = throb;
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return true;
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}
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void nsgtk_throbber_finalise(void)
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{
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int i;
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for (i = 0; i < nsgtk_throbber->nframes; i++)
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gdk_pixbuf_unref(nsgtk_throbber->framedata[i]);
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free(nsgtk_throbber->framedata);
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free(nsgtk_throbber);
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nsgtk_throbber = NULL;
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}
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