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(imagemagick_compute_animated_image): Implement a simple cache

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(imagemagick_compute_animated_image): Fix some compilation
warnings.  Implement a very simple cache to make the animation
usable at all, but it should be replaced with a per-image cache.
This commit is contained in:
Lars Magne Ingebrigtsen 2013-08-15 18:01:13 +02:00
parent 42fe2e88d6
commit 995be755ab
2 changed files with 20 additions and 4 deletions
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3
src/ChangeLog
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@ -18,6 +18,9 @@
* image.c (imagemagick_compute_animated_image): Implement animated
images (bug#14700).
(imagemagick_compute_animated_image): Fix some compilation
warnings. Implement a very simple cache to make the animation
usable at all, but it should be replaced with a per-image cache.
2013-08-15 Dmitry Antipov <dmantipov@yandex.ru>

21
src/image.c
View file

@ -7871,19 +7871,26 @@ imagemagick_filename_hint (Lisp_Object spec, char hint_buffer[MaxTextExtent])
compute ann the preceding images to be able to display a particular
sub-image. */
static MagickWand *animation_cache = NULL;
static int animation_index = 0;
static MagickWand *
imagemagick_compute_animated_image (MagickWand *super_wand, int ino)
{
MagickWand *composite_wand;
MagickSetIteratorIndex (super_wand, 0);
composite_wand = MagickGetImage (super_wand);
for (int i = 1; i <= ino; i++) {
if (ino == 0 || animation_cache == NULL)
composite_wand = MagickGetImage (super_wand);
else
composite_wand = animation_cache;
for (int i = max (1, animation_index); i <= ino; i++) {
MagickWand *sub_wand;
PixelIterator *source_iterator, *dest_iterator;
PixelWand **source, **dest;
long source_width, dest_width;
unsigned long source_width, dest_width;
MagickPixelPacket pixel;
MagickSetIteratorIndex (super_wand, i);
@ -7910,7 +7917,8 @@ imagemagick_compute_animated_image (MagickWand *super_wand, int ino)
return NULL;
}
while (source = PixelGetNextIteratorRow (source_iterator, &source_width)) {
while ((source = PixelGetNextIteratorRow (source_iterator, &source_width))
!= NULL) {
dest = PixelGetNextIteratorRow (dest_iterator, &dest_width);
for (int x = 0; x < source_width; x++)
{
@ -7929,6 +7937,11 @@ imagemagick_compute_animated_image (MagickWand *super_wand, int ino)
DestroyMagickWand (sub_wand);
}
/* Cache a copy for the next iteration. The current wand will be
destroyed by the caller. */
animation_cache = CloneMagickWand (composite_wand);
animation_index = ino;
return composite_wand;
}