Vincent Povirk : windowscodecs: Implement CopyPixels for 4-bit ICO icons.
Alexandre Julliard
julliard at winehq.org
Fri Aug 21 09:32:34 CDT 2009
Module: wine
Branch: master
Commit: a65010aa19101dfb7a8f4bf6433bfbe980542987
URL: http://source.winehq.org/git/wine.git/?a=commit;h=a65010aa19101dfb7a8f4bf6433bfbe980542987
Author: Vincent Povirk <vincent at codeweavers.com>
Date: Thu Aug 20 14:38:51 2009 -0500
windowscodecs: Implement CopyPixels for 4-bit ICO icons.
---
dlls/windowscodecs/icoformat.c | 50 ++++++++++++++++++++++++++++++++++++++++
1 files changed, 50 insertions(+), 0 deletions(-)
diff --git a/dlls/windowscodecs/icoformat.c b/dlls/windowscodecs/icoformat.c
index a6c7af3..3e9ec5b 100644
--- a/dlls/windowscodecs/icoformat.c
+++ b/dlls/windowscodecs/icoformat.c
@@ -203,6 +203,56 @@ static HRESULT IcoFrameDecode_ReadPixels(IcoFrameDecode *This)
/* read the XOR data */
switch (This->entry.wBitCount)
{
+ case 4:
+ {
+ UINT xorBytesPerRow = (width+7)/8*4;
+ UINT xorBytes = xorBytesPerRow * height;
+ INT xorStride;
+ BYTE *xorRow;
+ BYTE *bitsRow;
+ UINT x, y;
+
+ tempdata = HeapAlloc(GetProcessHeap(), 0, xorBytes);
+ if (!tempdata)
+ {
+ hr = E_OUTOFMEMORY;
+ goto fail;
+ }
+
+ hr = IStream_Read(This->parent->stream, tempdata, xorBytes, &bytesread);
+ if (FAILED(hr) || bytesread != xorBytes) goto fail;
+
+ if (bih.biHeight > 0) /* bottom-up DIB */
+ {
+ xorStride = -xorBytesPerRow;
+ xorRow = tempdata + (height-1)*xorBytesPerRow;
+ }
+ else /* top-down DIB */
+ {
+ xorStride = xorBytesPerRow;
+ xorRow = tempdata;
+ }
+
+ bits = HeapAlloc(GetProcessHeap(), 0, bitsSize);
+
+ /* palette-map the 4-bit data */
+ bitsRow = bits;
+ for (y=0; y<height; y++) {
+ BYTE *xorByte=xorRow;
+ DWORD *bitsPixel=(DWORD*)bitsRow;
+ for (x=0; x<width; x+=2) {
+ BYTE xorVal;
+ xorVal=*xorByte++;
+ *bitsPixel++ = colors[xorVal>>4];
+ if (x+1 < width) *bitsPixel++ = colors[xorVal&0xf];
+ }
+ xorRow += xorStride;
+ bitsRow += bitsStride;
+ }
+
+ HeapFree(GetProcessHeap(), 0, tempdata);
+ break;
+ }
case 8:
{
UINT xorBytesPerRow = (width+3)/4*4;
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