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gdiplus: Fix test crash in GdipSaveImageToStream.

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Correctly initialized parameters to GetDIBits (based on
GdipLockBitmapBits).
This commit is contained in:
Nathan Beckmann 2008-03-15 15:05:43 -07:00 committed by Alexandre Julliard
parent efd0b9ae7a
commit 2824aa2d33
1 changed files with 22 additions and 6 deletions
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28
dlls/gdiplus/image.c
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@ -908,7 +908,9 @@ GpStatus WINGDIPAPI GdipSaveImageToStream(GpImage *image, IStream* stream,
HRESULT hr;
short type;
HBITMAP hbmp;
HBITMAP old_hbmp;
HDC hdc;
int bm_is_selected;
BITMAPINFO bmp_info;
LPVOID bmp_bits;
encode_image_func* encode_image;
@ -917,6 +919,7 @@ GpStatus WINGDIPAPI GdipSaveImageToStream(GpImage *image, IStream* stream,
unsigned int dummy;
int i;
old_hbmp = 0;
output = NULL;
output_size = 0;
@ -943,18 +946,32 @@ GpStatus WINGDIPAPI GdipSaveImageToStream(GpImage *image, IStream* stream,
hr = IPicture_get_Handle(image->picture, (OLE_HANDLE*)&hbmp);
if (FAILED(hr) || !hbmp)
return GenericError;
hr = IPicture_get_CurDC(image->picture, &hdc);
if (FAILED(hr))
return GenericError;
bm_is_selected = (hdc != 0);
if (!bm_is_selected) {
hdc = CreateCompatibleDC(0);
old_hbmp = SelectObject(hdc, hbmp);
}
/* get bits from HBITMAP */
hdc = GetDC(0);
bmp_info.bmiHeader.biSize = sizeof(bmp_info.bmiHeader);
bmp_info.bmiHeader.biBitCount = 0;
GetDIBits(hdc, hbmp, 0, 0, NULL, &bmp_info, DIB_RGB_COLORS);
bmp_bits = GdipAlloc(bmp_info.bmiHeader.biSizeImage);
if (!bmp_bits) {
ReleaseDC(0, hdc);
return OutOfMemory;
if (bmp_bits)
GetDIBits(hdc, hbmp, 0, abs(bmp_info.bmiHeader.biHeight), bmp_bits, &bmp_info, DIB_RGB_COLORS);
if (!bm_is_selected) {
SelectObject(hdc, old_hbmp);
DeleteDC(hdc);
}
GetDIBits(hdc, hbmp, 0, bmp_info.bmiHeader.biHeight, bmp_bits, &bmp_info, DIB_RGB_COLORS);
if (!bmp_bits)
return OutOfMemory;
stat = encode_image(bmp_bits, &bmp_info, &output, &output_size);
if (stat == Ok)
@ -962,7 +979,6 @@ GpStatus WINGDIPAPI GdipSaveImageToStream(GpImage *image, IStream* stream,
GdipFree(output);
GdipFree(bmp_bits);
ReleaseDC(0, hdc);
return stat;
}