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comctl32/imagelist: Pre-multiply the colors by the alpha channel when storing an image with alpha.

This commit is contained in:
Alexandre Julliard 2010-05-14 20:19:58 +02:00
parent 5532927ed3
commit f2b993d414
2 changed files with 22 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
dlls/comctl32/imagelist.c
View File

@ -202,15 +202,25 @@ static BOOL add_with_alpha( HIMAGELIST himl, HDC hdc, int pos, int count,
for (j = n * width; j < (n + 1) * width; j++)
if (!mask_bits || !((mask_bits[i * mask_width + j / 8] << (j % 8)) & 0x80))
bits[i * bm.bmWidth + j] |= 0xff000000;
StretchDIBits( himl->hdcImage, pt.x, pt.y, himl->cx, himl->cy,
n * width, 0, width, height, bits, info, DIB_RGB_COLORS, SRCCOPY );
}
else
{
if (himl->has_alpha) himl->has_alpha[pos + n] = 1;
StretchBlt( himl->hdcImage, pt.x, pt.y, himl->cx, himl->cy,
hdc, n * width, 0, width, height, SRCCOPY );
/* pre-multiply by the alpha channel */
for (i = 0; i < height; i++)
for (j = n * width; j < (n + 1) * width; j++)
{
DWORD argb = bits[i * bm.bmWidth + j];
DWORD alpha = argb >> 24;
bits[i * bm.bmWidth + j] = ((argb & 0xff000000) |
(((argb & 0x00ff0000) * alpha / 255) & 0x00ff0000) |
(((argb & 0x0000ff00) * alpha / 255) & 0x0000ff00) |
(((argb & 0x000000ff) * alpha / 255)));
}
}
StretchDIBits( himl->hdcImage, pt.x, pt.y, himl->cx, himl->cy,
n * width, 0, width, height, bits, info, DIB_RGB_COLORS, SRCCOPY );
if (hdcMask) StretchBlt( himl->hdcMask, pt.x, pt.y, himl->cx, himl->cy,
hdcMask, n * width, 0, width, height, SRCCOPY );

16
dlls/comctl32/tests/imagelist.c
View File

@ -1189,17 +1189,17 @@ static void test_ImageList_DrawIndirect(void)
check_ImageList_DrawIndirect_fStyle(hdcDst, himl, bits, iImage, ILD_IMAGE, 0x00ABCDEF, __LINE__);
check_ImageList_DrawIndirect_fStyle(hdcDst, himl, bits, iImage, ILD_PRESERVEALPHA, 0x00ABCDEF, __LINE__);
check_ImageList_DrawIndirect_fStyle(hdcDst, himl, bits, iAlphaImage, ILD_NORMAL, 0x00D3E5F7, __LINE__);
check_ImageList_DrawIndirect_fStyle(hdcDst, himl, bits, iAlphaImage, ILD_TRANSPARENT, 0x00D3E5F7, __LINE__);
todo_wine
{
check_ImageList_DrawIndirect_fStyle(hdcDst, himl, bits, iAlphaImage, ILD_NORMAL, 0x00D3E5F7, __LINE__);
check_ImageList_DrawIndirect_fStyle(hdcDst, himl, bits, iAlphaImage, ILD_TRANSPARENT, 0x00D3E5F7, __LINE__);
check_ImageList_DrawIndirect_broken(hdcDst, himl, bits, iAlphaImage, ILD_BLEND25, ILS_NORMAL, 0, 0x00E8F1FA, 0x009DA8B1, __LINE__);
check_ImageList_DrawIndirect_broken(hdcDst, himl, bits, iAlphaImage, ILD_BLEND50, ILS_NORMAL, 0, 0x00E8F1FA, 0x008C99A3, __LINE__);
check_ImageList_DrawIndirect_fStyle(hdcDst, himl, bits, iAlphaImage, ILD_MASK, 0x00D3E5F7, __LINE__);
check_ImageList_DrawIndirect_fStyle(hdcDst, himl, bits, iAlphaImage, ILD_IMAGE, 0x00D3E5F7, __LINE__);
check_ImageList_DrawIndirect_fStyle(hdcDst, himl, bits, iAlphaImage, ILD_PRESERVEALPHA, 0x005D6F81, __LINE__);
}
check_ImageList_DrawIndirect_fStyle(hdcDst, himl, bits, iAlphaImage, ILD_MASK, 0x00D3E5F7, __LINE__);
check_ImageList_DrawIndirect_fStyle(hdcDst, himl, bits, iAlphaImage, ILD_IMAGE, 0x00D3E5F7, __LINE__);
todo_wine check_ImageList_DrawIndirect_fStyle(hdcDst, himl, bits, iAlphaImage, ILD_PRESERVEALPHA, 0x005D6F81, __LINE__);
check_ImageList_DrawIndirect_fStyle(hdcDst, himl, bits, iTransparentImage, ILD_NORMAL, 0x00FFFFFF, __LINE__);
@ -1207,8 +1207,8 @@ static void test_ImageList_DrawIndirect(void)
check_ImageList_DrawIndirect_ILD_ROP(hdcDst, himl, bits, iImage, SRCINVERT, 0x00543210, __LINE__);
/* ILD_ROP is ignored when the image has an alpha channel */
todo_wine check_ImageList_DrawIndirect_ILD_ROP(hdcDst, himl, bits, iAlphaImage, SRCCOPY, 0x00D3E5F7, __LINE__);
todo_wine check_ImageList_DrawIndirect_ILD_ROP(hdcDst, himl, bits, iAlphaImage, SRCINVERT, 0x00D3E5F7, __LINE__);
check_ImageList_DrawIndirect_ILD_ROP(hdcDst, himl, bits, iAlphaImage, SRCCOPY, 0x00D3E5F7, __LINE__);
check_ImageList_DrawIndirect_ILD_ROP(hdcDst, himl, bits, iAlphaImage, SRCINVERT, 0x00D3E5F7, __LINE__);
todo_wine check_ImageList_DrawIndirect_fState(hdcDst, himl, bits, iImage, ILD_NORMAL, ILS_SATURATE, 0, 0x00CCCCCC, __LINE__);
todo_wine check_ImageList_DrawIndirect_broken(hdcDst, himl, bits, iAlphaImage, ILD_NORMAL, ILS_SATURATE, 0, 0x00AFAFAF, 0x00F0F0F0, __LINE__);
@ -1217,7 +1217,7 @@ static void test_ImageList_DrawIndirect(void)
check_ImageList_DrawIndirect_fState(hdcDst, himl, bits, iImage, ILD_NORMAL, ILS_SHADOW, 0, 0x00ABCDEF, __LINE__);
check_ImageList_DrawIndirect_fState(hdcDst, himl, bits, iImage, ILD_NORMAL, ILS_ALPHA, 127, 0x00D5E6F7, __LINE__);
todo_wine check_ImageList_DrawIndirect_broken(hdcDst, himl, bits, iAlphaImage, ILD_NORMAL, ILS_ALPHA, 127, 0x00E9F2FB, 0x00AEB7C0, __LINE__);
check_ImageList_DrawIndirect_broken(hdcDst, himl, bits, iAlphaImage, ILD_NORMAL, ILS_ALPHA, 127, 0x00E9F2FB, 0x00AEB7C0, __LINE__);
todo_wine check_ImageList_DrawIndirect_broken(hdcDst, himl, bits, iAlphaImage, ILD_NORMAL, ILS_NORMAL, 127, 0x00E9F2FB, 0x00D3E5F7, __LINE__);
cleanup: