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windowscodecs: Implement conversion from 16bppBGR565 to 32bppBGRA.

This commit is contained in:
Vincent Povirk 2009-08-13 13:34:20 -05:00 committed by Alexandre Julliard
parent e38fd32e84
commit 7bbe731252
2 changed files with 51 additions and 0 deletions
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50
dlls/windowscodecs/converter.c
View File

@ -37,6 +37,7 @@ struct FormatConverter;
enum pixelformat {
format_16bppBGR555,
format_16bppBGR565,
format_32bppBGR,
format_32bppBGRA
};
@ -113,6 +114,54 @@ static HRESULT copypixels_to_32bppBGRA(struct FormatConverter *This, const WICRe
return res;
}
return S_OK;
case format_16bppBGR565:
if (prc)
{
HRESULT res;
UINT x, y;
BYTE *srcdata;
UINT srcstride, srcdatasize;
const BYTE *srcrow;
const WORD *srcpixel;
BYTE *dstrow;
DWORD *dstpixel;
srcstride = 2 * prc->Width;
srcdatasize = srcstride * prc->Height;
srcdata = HeapAlloc(GetProcessHeap(), 0, srcdatasize);
if (!srcdata) return E_OUTOFMEMORY;
res = IWICBitmapSource_CopyPixels(This->source, prc, srcstride, srcdatasize, srcdata);
if (SUCCEEDED(res))
{
srcrow = srcdata;
dstrow = pbBuffer;
for (y=0; y<prc->Height; y++) {
srcpixel=(const WORD*)srcrow;
dstpixel=(DWORD*)dstrow;
for (x=0; x<prc->Width; x++) {
WORD srcval;
srcval=*srcpixel++;
*dstpixel++=0xff000000 | /* constant 255 alpha */
((srcval << 8) & 0xf80000) | /* r */
((srcval << 3) & 0x070000) | /* r - 3 bits */
((srcval << 5) & 0x00fc00) | /* g */
((srcval >> 1) & 0x000300) | /* g - 2 bits */
((srcval << 3) & 0x0000f8) | /* b */
((srcval >> 2) & 0x000007); /* b - 3 bits */
}
srcrow += srcstride;
dstrow += cbStride;
}
}
HeapFree(GetProcessHeap(), 0, srcdata);
return res;
}
return S_OK;
case format_32bppBGR:
if (prc)
{
@ -154,6 +203,7 @@ static HRESULT copypixels_to_32bppBGR(struct FormatConverter *This, const WICRec
static const struct pixelformatinfo supported_formats[] = {
{format_16bppBGR555, &GUID_WICPixelFormat16bppBGR555, NULL},
{format_16bppBGR565, &GUID_WICPixelFormat16bppBGR565, NULL},
{format_32bppBGR, &GUID_WICPixelFormat32bppBGR, copypixels_to_32bppBGR},
{format_32bppBGRA, &GUID_WICPixelFormat32bppBGRA, copypixels_to_32bppBGRA},
{0}

1
dlls/windowscodecs/regsvr.c
View File

@ -790,6 +790,7 @@ static struct regsvr_decoder const decoder_list[] = {
static GUID const * const converter_formats[] = {
&GUID_WICPixelFormat16bppBGR555,
&GUID_WICPixelFormat16bppBGR565,
&GUID_WICPixelFormat32bppBGR,
&GUID_WICPixelFormat32bppBGRA,
NULL