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comctl32: Setup the alpha channel also when reading an imagelist from a stream.

This commit is contained in:
Alexandre Julliard 2011-11-15 22:11:15 +01:00
parent 4c785235d0
commit 73b9dc98eb
1 changed files with 58 additions and 25 deletions
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83
dlls/comctl32/imagelist.c
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@ -2090,26 +2090,23 @@ ImageList_Merge (HIMAGELIST himl1, INT i1, HIMAGELIST himl2, INT i2,
/* helper for ImageList_Read, see comments below */
static BOOL _read_bitmap(HDC hdcIml, LPSTREAM pstm)
static void *read_bitmap(LPSTREAM pstm, BITMAPINFO *bmi)
{
BITMAPFILEHEADER bmfh;
int bitsperpixel, palspace;
char bmi_buf[sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * 256];
LPBITMAPINFO bmi = (LPBITMAPINFO)bmi_buf;
int result = FALSE;
LPBYTE bits = NULL;
void *bits;
if (FAILED(IStream_Read ( pstm, &bmfh, sizeof(bmfh), NULL)))
return FALSE;
return NULL;
if (bmfh.bfType != (('M'<<8)|'B'))
return FALSE;
return NULL;
if (FAILED(IStream_Read ( pstm, &bmi->bmiHeader, sizeof(bmi->bmiHeader), NULL)))
return FALSE;
return NULL;
if ((bmi->bmiHeader.biSize != sizeof(bmi->bmiHeader)))
return FALSE;
return NULL;
TRACE("width %u, height %u, planes %u, bpp %u\n",
bmi->bmiHeader.biWidth, bmi->bmiHeader.biHeight,
@ -2125,23 +2122,17 @@ static BOOL _read_bitmap(HDC hdcIml, LPSTREAM pstm)
/* read the palette right after the end of the bitmapinfoheader */
if (palspace && FAILED(IStream_Read(pstm, bmi->bmiColors, palspace, NULL)))
goto error;
return NULL;
bits = Alloc(bmi->bmiHeader.biSizeImage);
if (!bits)
goto error;
if (!bits) return NULL;
if (FAILED(IStream_Read(pstm, bits, bmi->bmiHeader.biSizeImage, NULL)))
goto error;
if (!StretchDIBits(hdcIml, 0, 0, bmi->bmiHeader.biWidth, bmi->bmiHeader.biHeight,
0, 0, bmi->bmiHeader.biWidth, bmi->bmiHeader.biHeight,
bits, bmi, DIB_RGB_COLORS, SRCCOPY))
goto error;
result = TRUE;
error:
Free(bits);
return result;
{
Free(bits);
return NULL;
}
return bits;
}
/*************************************************************************
@ -2177,6 +2168,11 @@ error:
*/
HIMAGELIST WINAPI ImageList_Read (LPSTREAM pstm)
{
char image_buf[sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * 256];
char mask_buf[sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * 256];
BITMAPINFO *image_info = (BITMAPINFO *)image_buf;
BITMAPINFO *mask_info = (BITMAPINFO *)mask_buf;
void *image_bits, *mask_bits = NULL;
ILHEAD ilHead;
HIMAGELIST himl;
int i;
@ -2197,19 +2193,56 @@ HIMAGELIST WINAPI ImageList_Read (LPSTREAM pstm)
if (!himl)
return NULL;
if (!_read_bitmap(himl->hdcImage, pstm))
if (!(image_bits = read_bitmap(pstm, image_info)))
{
WARN("failed to read bitmap from stream\n");
return NULL;
}
if (ilHead.flags & ILC_MASK)
{
if (!_read_bitmap(himl->hdcMask, pstm))
if (!(mask_bits = read_bitmap(pstm, mask_info)))
{
WARN("failed to read mask bitmap from stream\n");
return NULL;
}
}
else mask_info = NULL;
if (himl->has_alpha && image_info->bmiHeader.biBitCount == 32)
{
DWORD *ptr = image_bits;
BYTE *mask_ptr = mask_bits;
int stride = himl->cy * image_info->bmiHeader.biWidth;
if (image_info->bmiHeader.biHeight > 0) /* bottom-up */
{
ptr += (imagelist_height( ilHead.cCurImage ) - 1) * stride;
mask_ptr += (imagelist_height( ilHead.cCurImage ) - 1) * stride / 8;
stride = -stride;
image_info->bmiHeader.biHeight = himl->cy;
}
else image_info->bmiHeader.biHeight = -himl->cy;
for (i = 0; i < ilHead.cCurImage; i += TILE_COUNT)
{
add_dib_bits( himl, i, min( ilHead.cCurImage - i, TILE_COUNT ),
himl->cx, himl->cy, image_info, mask_info, ptr, mask_ptr );
ptr += stride;
mask_ptr += stride / 8;
}
}
else
{
StretchDIBits( himl->hdcImage, 0, 0, image_info->bmiHeader.biWidth, image_info->bmiHeader.biHeight,
0, 0, image_info->bmiHeader.biWidth, image_info->bmiHeader.biHeight,
image_bits, image_info, DIB_RGB_COLORS, SRCCOPY);
if (mask_info)
StretchDIBits( himl->hdcMask, 0, 0, mask_info->bmiHeader.biWidth, mask_info->bmiHeader.biHeight,
0, 0, mask_info->bmiHeader.biWidth, mask_info->bmiHeader.biHeight,
mask_bits, mask_info, DIB_RGB_COLORS, SRCCOPY);
}
Free( image_bits );
Free( mask_bits );
himl->cCurImage = ilHead.cCurImage;
himl->cMaxImage = ilHead.cMaxImage;