mirror of
https://github.com/netsurf-browser/netsurf
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6807b4208a
NetSurf includes are now done with ""s and other system includes with <>s as C intended. The scandeps tool has been updated to only look for ""ed includes, and to verify that the files exist in the tree before adding them to the dependency lines. The depend rule has therefore been augmented to make sure the autogenerated files are built before it is run. This is untested under self-hosted RISC OS builds. All else tested and works. svn path=/trunk/netsurf/; revision=3307
132 lines
3.2 KiB
C
132 lines
3.2 KiB
C
/*
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* This file is part of NetSurf, http://netsurf-browser.org/
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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 "utils/log.h"
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#include "image/gifread.h"
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#include "gtk/gtk_throbber.h"
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#include "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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