p
/
fiv
1
1
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Compare commits

base: p:bae640a11600559f2dc54f8b7dbef50c3e49c6d5
Branches Tags
p:master
...
compare: p:c04c4063e4a4feabf0eb23b3a38630e4fce1456b
Branches Tags
p:master

2 Commits
bae640a116 ... c04c4063e4

Author SHA1 Message Date
Přemysl Eric Janouch c04c4063e4
Fix a class of animated transparent WebPs 2023-12-28 07:48:11 +01:00
Přemysl Eric Janouch aed6ae6b83
Add a comment regarding high-precision JPEGs 2023-12-05 04:57:01 +01:00
1 changed files with 10 additions and 3 deletions
Show Stats Expand all files Collapse all files

13
fiv-io.c
View File

@ -1538,6 +1538,8 @@ load_libjpeg_turbo(const char *data, gsize len, const FivIoOpenContext *ctx,
jpeg_create_decompress(&cinfo);
jpeg_mem_src(&cinfo, (const unsigned char *) data, len);
(void) jpeg_read_header(&cinfo, true);
// TODO(p): With newer libjpeg-turbo, if cinfo.data_precision is 12 or 16,
// try to load it with higher precision.
bool use_cmyk = cinfo.jpeg_color_space == JCS_CMYK ||
cinfo.jpeg_color_space == JCS_YCCK;
@ -1739,10 +1741,8 @@ load_libwebp_frame(WebPAnimDecoder *dec, const WebPAnimInfo *info,
return NULL;
}
bool is_opaque = (info->bgcolor & 0xFF) == 0xFF;
uint64_t area = info->canvas_width * info->canvas_height;
FivIoImage *image = fiv_io_image_new(
is_opaque ? CAIRO_FORMAT_RGB24 : CAIRO_FORMAT_ARGB32,
FivIoImage *image = fiv_io_image_new(CAIRO_FORMAT_RGB24,
info->canvas_width, info->canvas_height);
if (!image) {
set_error(error, "image allocation failure");
@ -1758,6 +1758,13 @@ load_libwebp_frame(WebPAnimDecoder *dec, const WebPAnimInfo *info,
*dst++ = GUINT32_FROM_LE(*src++);
}
// info->bgcolor is not reliable.
for (const uint32_t *p = dst, *end = dst + area; p < end; p++)
if ((~*p & 0xff000000)) {
image->format = CAIRO_FORMAT_ARGB32;
break;
}
// This API is confusing and awkward.
image->frame_duration = timestamp - *last_timestamp;
*last_timestamp = timestamp;