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Load even partial WebP images

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This commit is contained in:
Přemysl Eric Janouch 2022-01-22 22:43:01 +01:00
parent 0a11abd3fe
commit 3796f56e81
Signed by: p
GPG Key ID: A0420B94F92B9493
1 changed files with 16 additions and 5 deletions
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21
fiv-io.c
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@ -1223,6 +1223,8 @@ static const char *
load_libwebp_error(VP8StatusCode err)
{
switch (err) {
case VP8_STATUS_OK:
return "OK";
case VP8_STATUS_OUT_OF_MEMORY:
return "out of memory";
case VP8_STATUS_INVALID_PARAM:
@ -1271,10 +1273,20 @@ load_libwebp_nonanimated(WebPDecoderConfig *config, const WebPData *wd,
else
config->output.colorspace = premultiply ? MODE_Argb : MODE_ARGB;
VP8StatusCode err = 0;
if ((err = WebPDecode(wd->bytes, wd->size, config))) {
g_set_error(error, FIV_IO_ERROR, FIV_IO_ERROR_OPEN,
"%s: %s", "WebP decoding error", load_libwebp_error(err));
WebPIDecoder *idec = WebPIDecode(NULL, 0, config);
if (!idec) {
set_error(error, "WebP decoding error");
cairo_surface_destroy(surface);
return NULL;
}
VP8StatusCode err = WebPIUpdate(idec, wd->bytes, wd->size);
WebPIDelete(idec);
if (err == VP8_STATUS_SUSPENDED) {
g_warning("partial WebP");
} else if (err) {
g_set_error(error, FIV_IO_ERROR, FIV_IO_ERROR_OPEN, "%s: %s",
"WebP decoding error", load_libwebp_error(err));
cairo_surface_destroy(surface);
return NULL;
}
@ -1388,7 +1400,6 @@ open_libwebp(const gchar *data, gsize len, const gchar *uri,
}
// TODO(p): Differentiate between a bad WebP, and not a WebP.
// TODO(p): Make sure partial WebPs load with a non-fatal error.
VP8StatusCode err = 0;
WebPData wd = {.bytes = (const uint8_t *) data, .size = len};
if ((err = WebPGetFeatures(wd.bytes, wd.size, &config.input))) {