mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-12-29 15:29:42 +03:00
132 lines
3.2 KiB
C
132 lines
3.2 KiB
C
/*
|
|
* This file is part of NetSurf, http://netsurf.sourceforge.net/
|
|
* Licensed under the GNU General Public License,
|
|
* http://www.opensource.org/licenses/gpl-license
|
|
* Copyright 2006 Rob Kendrick <rjek@rjek.com>
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include "netsurf/utils/log.h"
|
|
#include "netsurf/image/gifread.h"
|
|
#include "netsurf/gtk/gtk_throbber.h"
|
|
#include "netsurf/gtk/gtk_bitmap.h"
|
|
|
|
struct nsgtk_throbber *nsgtk_throbber = NULL;
|
|
|
|
bool nsgtk_throbber_initialise(const char *fn)
|
|
{
|
|
/* disect the GIF provided by filename in *fn into a series of
|
|
* GdkPixbuf for use later.
|
|
*/
|
|
struct gif_animation *gif; /**< structure for gifread.c */
|
|
struct nsgtk_throbber *throb; /**< structure we generate */
|
|
int i;
|
|
|
|
FILE *fh = fopen(fn, "rb");
|
|
|
|
if (fh == NULL) {
|
|
LOG(("Unable to open throbber image '%s' for reading!", fn));
|
|
return false;
|
|
}
|
|
|
|
gif = (struct gif_animation *)malloc(sizeof(struct gif_animation));
|
|
throb = (struct nsgtk_throbber *)malloc(sizeof(struct nsgtk_throbber));
|
|
|
|
/* discover the size of the data file. */
|
|
fseek(fh, 0, SEEK_END);
|
|
gif->buffer_size = ftell(fh);
|
|
fseek(fh, 0, SEEK_SET);
|
|
|
|
/* allocate a block of sufficient size, and load the data in. */
|
|
gif->gif_data = (unsigned char *)malloc(gif->buffer_size);
|
|
fread(gif->gif_data, gif->buffer_size, 1, fh);
|
|
fclose(fh);
|
|
|
|
/* set current position within GIF file to beginning, in order to
|
|
* signal to gifread that we're brand new.
|
|
*/
|
|
gif->buffer_position = 0;
|
|
|
|
/* initialise the gif_animation structure. */
|
|
switch (gif_initialise(gif))
|
|
{
|
|
case GIF_INSUFFICIENT_FRAME_DATA:
|
|
case GIF_FRAME_DATA_ERROR:
|
|
case GIF_INSUFFICIENT_DATA:
|
|
case GIF_DATA_ERROR:
|
|
LOG(("GIF image '%s' appears invalid!", fn));
|
|
free(gif->gif_data);
|
|
free(gif);
|
|
free(throb);
|
|
return false;
|
|
break;
|
|
case GIF_INSUFFICIENT_MEMORY:
|
|
LOG(("Ran out of memory decoding GIF image '%s'!", fn));
|
|
free(gif->gif_data);
|
|
free(gif);
|
|
free(throb);
|
|
return false;
|
|
break;
|
|
}
|
|
|
|
throb->nframes = gif->frame_count;
|
|
|
|
if (throb->nframes < 2)
|
|
{
|
|
/* we need at least two frames - one for idle, one for active */
|
|
LOG(("Insufficent number of frames in throbber image '%s'!",
|
|
fn));
|
|
LOG(("(GIF contains %d frames, where 2 is a minimum.)",
|
|
throb->nframes));
|
|
free(gif->gif_data);
|
|
free(gif);
|
|
free(throb);
|
|
return false;
|
|
}
|
|
|
|
throb->framedata = (GdkPixbuf **)malloc(sizeof(GdkPixbuf *)
|
|
* throb->nframes);
|
|
|
|
/* decode each frame in turn, extracting the struct bitmap * for each,
|
|
* and put that in our array of frames.
|
|
*/
|
|
for (i = 0; i < throb->nframes; i++)
|
|
{
|
|
gif_decode_frame(gif, i);
|
|
throb->framedata[i] = gdk_pixbuf_copy(
|
|
gtk_bitmap_get_primary(gif->frame_image));
|
|
}
|
|
|
|
gif_finalise(gif);
|
|
free(gif->gif_data);
|
|
free(gif);
|
|
|
|
/* debug code: save out each frame as a PNG to make sure decoding is
|
|
* working correctly.
|
|
|
|
for (i = 0; i < throb->nframes; i++) {
|
|
char fname[20];
|
|
sprintf(fname, "frame%d.png", i);
|
|
gdk_pixbuf_save(throb->framedata[i], fname, "png", NULL, NULL);
|
|
}
|
|
*/
|
|
|
|
nsgtk_throbber = throb;
|
|
|
|
return true;
|
|
}
|
|
|
|
void nsgtk_throbber_finalise(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < nsgtk_throbber->nframes; i++)
|
|
gdk_pixbuf_unref(nsgtk_throbber->framedata[i]);
|
|
|
|
free(nsgtk_throbber->framedata);
|
|
free(nsgtk_throbber);
|
|
|
|
nsgtk_throbber = NULL;
|
|
}
|