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cwebp: fix jpg encodes on XP

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correct has_alpha check; previously it was controlled by keep_alpha,
which overrode the source format check.
fixes issue #127

Change-Id: I949be90419b03610c64900be0fd37f83b70cbe73
This commit is contained in:
James Zern
2012-10-08 18:15:30 -07:00
parent 7b3eb372ad
commit ecd66f774d
1 changed files with 13 additions and 12 deletions
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25
examples/cwebp.c
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@@ -179,18 +179,19 @@ static HRESULT ReadPictureWithWIC(const char* filename,
IFS(IWICBitmapFrameDecode_GetPixelFormat(pFrame, &srcPixelFormat));
IFS(IWICBitmapDecoder_GetContainerFormat(pDecoder, &srcContainerFormat));
has_alpha = keep_alpha;
for (i = 0;
has_alpha && i < sizeof(alphaContainers)/sizeof(alphaContainers[0]);
++i) {
if (IsEqualGUID(MAKE_REFGUID(srcContainerFormat),
MAKE_REFGUID(*alphaContainers[i]))) {
has_alpha =
IsEqualGUID(MAKE_REFGUID(srcPixelFormat),
MAKE_REFGUID(GUID_WICPixelFormat32bppRGBA_)) ||
IsEqualGUID(MAKE_REFGUID(srcPixelFormat),
MAKE_REFGUID(GUID_WICPixelFormat32bppBGRA_));
break;
if (keep_alpha) {
for (i = 0;
i < sizeof(alphaContainers) / sizeof(alphaContainers[0]);
++i) {
if (IsEqualGUID(MAKE_REFGUID(srcContainerFormat),
MAKE_REFGUID(*alphaContainers[i]))) {
has_alpha =
IsEqualGUID(MAKE_REFGUID(srcPixelFormat),
MAKE_REFGUID(GUID_WICPixelFormat32bppRGBA_)) ||
IsEqualGUID(MAKE_REFGUID(srcPixelFormat),
MAKE_REFGUID(GUID_WICPixelFormat32bppBGRA_));
break;
}
}
}