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gdi32/tests: Add a test for alpha channel handling in StretchBlt.

This commit is contained in:
Alexandre Julliard 2011-09-20 17:58:12 +02:00
parent e331b0c892
commit b6153354dd
1 changed files with 33 additions and 1 deletions
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34
dlls/gdi32/tests/bitmap.c
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@ -2942,7 +2942,39 @@ static void test_StretchBlt(void)
check_StretchBlt_stretch(hdcDst, hdcSrc, dstBuffer, srcBuffer,
0, 0, 2, 2, 1, 1, -2, -2, expected, expected, __LINE__);
/* Tidy up */
SelectObject(hdcSrc, oldSrc);
DeleteObject(bmpSrc);
biSrc.bmiHeader.biHeight = -2;
biSrc.bmiHeader.biBitCount = 24;
bmpSrc = CreateDIBSection(hdcScreen, &biSrc, DIB_RGB_COLORS, (void**)&srcBuffer, NULL, 0);
oldSrc = SelectObject(hdcSrc, bmpSrc);
expected[0] = 0xFEEDFACE, expected[1] = 0xCAFED00D;
expected[2] = 0x76543210, expected[3] = 0xFEDCBA98;
memcpy(dstBuffer, expected, 4 * sizeof(*dstBuffer));
StretchBlt(hdcSrc, 0, 0, 2, 2, hdcDst, 0, 0, 2, 2, SRCCOPY );
memset(dstBuffer, 0x55, 4 * sizeof(*dstBuffer));
StretchBlt(hdcDst, 0, 0, 2, 2, hdcSrc, 0, 0, 2, 2, SRCCOPY );
expected[0] = 0x00EDFACE, expected[1] = 0x00FED00D;
expected[2] = 0x00543210, expected[3] = 0x00DCBA98;
ok(!memcmp(dstBuffer, expected, 16),
"StretchBlt expected { %08X, %08X, %08X, %08X } got { %08X, %08X, %08X, %08X }\n",
expected[0], expected[1], expected[2], expected[3],
dstBuffer[0], dstBuffer[1], dstBuffer[2], dstBuffer[3] );
expected[0] = 0xFEEDFACE, expected[1] = 0xCAFED00D;
expected[2] = 0x76543210, expected[3] = 0xFEDCBA98;
memcpy(srcBuffer, expected, 4 * sizeof(*dstBuffer));
memset(dstBuffer, 0x55, 4 * sizeof(*dstBuffer));
StretchBlt(hdcDst, 0, 0, 2, 2, hdcSrc, 0, 0, 2, 2, SRCCOPY );
expected[0] = 0x00EDFACE, expected[1] = 0x00D00DFE;
expected[2] = 0x00543210, expected[3] = 0x00BA9876;
ok(!memcmp(dstBuffer, expected, 16),
"StretchBlt expected { %08X, %08X, %08X, %08X } got { %08X, %08X, %08X, %08X }\n",
expected[0], expected[1], expected[2], expected[3],
dstBuffer[0], dstBuffer[1], dstBuffer[2], dstBuffer[3] );
SelectObject(hdcSrc, oldSrc);
DeleteObject(bmpSrc);
DeleteDC(hdcSrc);