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gdiplus: Avoid not necessary memory allocation in GdipCreateBitmapFromHICON.

This commit is contained in:
Dmitry Timoshkov 2013-01-16 17:18:30 +08:00 committed by Alexandre Julliard
parent 31e8976910
commit 0d0f05e523
1 changed files with 12 additions and 33 deletions
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45
dlls/gdiplus/image.c
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@ -1628,13 +1628,12 @@ GpStatus WINGDIPAPI GdipCreateBitmapFromHICON(HICON hicon, GpBitmap** bitmap)
ICONINFO iinfo;
BITMAP bm;
int ret;
UINT width, height;
UINT width, height, stride;
GpRect rect;
BitmapData lockeddata;
HDC screendc;
BOOL has_alpha;
int x, y;
BYTE *bits;
BITMAPINFOHEADER bih;
DWORD *src;
BYTE *dst_row;
@ -1654,24 +1653,13 @@ GpStatus WINGDIPAPI GdipCreateBitmapFromHICON(HICON hicon, GpBitmap** bitmap)
}
width = bm.bmWidth;
height = iinfo.hbmColor ? abs(bm.bmHeight) : abs(bm.bmHeight) / 2;
stride = width * 4;
if (iinfo.hbmColor)
height = abs(bm.bmHeight);
else /* combined bitmap + mask */
height = abs(bm.bmHeight) / 2;
bits = HeapAlloc(GetProcessHeap(), 0, 4*width*height);
if (!bits) {
DeleteObject(iinfo.hbmColor);
DeleteObject(iinfo.hbmMask);
return OutOfMemory;
}
stat = GdipCreateBitmapFromScan0(width, height, 0, PixelFormat32bppARGB, NULL, bitmap);
stat = GdipCreateBitmapFromScan0(width, height, stride, PixelFormat32bppARGB, NULL, bitmap);
if (stat != Ok) {
DeleteObject(iinfo.hbmColor);
DeleteObject(iinfo.hbmMask);
HeapFree(GetProcessHeap(), 0, bits);
return stat;
}
@ -1684,7 +1672,6 @@ GpStatus WINGDIPAPI GdipCreateBitmapFromHICON(HICON hicon, GpBitmap** bitmap)
if (stat != Ok) {
DeleteObject(iinfo.hbmColor);
DeleteObject(iinfo.hbmMask);
HeapFree(GetProcessHeap(), 0, bits);
GdipDisposeImage((GpImage*)*bitmap);
return stat;
}
@ -1704,14 +1691,14 @@ GpStatus WINGDIPAPI GdipCreateBitmapFromHICON(HICON hicon, GpBitmap** bitmap)
screendc = GetDC(0);
if (iinfo.hbmColor)
{
GetDIBits(screendc, iinfo.hbmColor, 0, height, bits, (BITMAPINFO*)&bih, DIB_RGB_COLORS);
GetDIBits(screendc, iinfo.hbmColor, 0, height, lockeddata.Scan0, (BITMAPINFO*)&bih, DIB_RGB_COLORS);
if (bm.bmBitsPixel == 32)
{
has_alpha = FALSE;
/* If any pixel has a non-zero alpha, ignore hbmMask */
src = (DWORD*)bits;
src = (DWORD*)lockeddata.Scan0;
for (x=0; x<width && !has_alpha; x++)
for (y=0; y<height && !has_alpha; y++)
if ((*src++ & 0xff000000) != 0)
@ -1721,24 +1708,16 @@ GpStatus WINGDIPAPI GdipCreateBitmapFromHICON(HICON hicon, GpBitmap** bitmap)
}
else
{
GetDIBits(screendc, iinfo.hbmMask, 0, height, bits, (BITMAPINFO*)&bih, DIB_RGB_COLORS);
GetDIBits(screendc, iinfo.hbmMask, 0, height, lockeddata.Scan0, (BITMAPINFO*)&bih, DIB_RGB_COLORS);
has_alpha = FALSE;
}
/* copy the image data to the Bitmap */
src = (DWORD*)bits;
dst_row = lockeddata.Scan0;
for (y=0; y<height; y++)
{
memcpy(dst_row, src, width*4);
src += width;
dst_row += lockeddata.Stride;
}
if (!has_alpha)
{
if (iinfo.hbmMask)
{
BYTE *bits = HeapAlloc(GetProcessHeap(), 0, height * stride);
/* read alpha data from the mask */
if (iinfo.hbmColor)
GetDIBits(screendc, iinfo.hbmMask, 0, height, bits, (BITMAPINFO*)&bih, DIB_RGB_COLORS);
@ -1760,11 +1739,13 @@ GpStatus WINGDIPAPI GdipCreateBitmapFromHICON(HICON hicon, GpBitmap** bitmap)
}
dst_row += lockeddata.Stride;
}
HeapFree(GetProcessHeap(), 0, bits);
}
else
{
/* set constant alpha of 255 */
dst_row = bits;
dst_row = lockeddata.Scan0;
for (y=0; y<height; y++)
{
dst = (DWORD*)dst_row;
@ -1782,8 +1763,6 @@ GpStatus WINGDIPAPI GdipCreateBitmapFromHICON(HICON hicon, GpBitmap** bitmap)
GdipBitmapUnlockBits(*bitmap, &lockeddata);
HeapFree(GetProcessHeap(), 0, bits);
return Ok;
}