[3/3] gdiplus: If a device doesn't support AlphaBlend don't convert image to PARGB.
Dmitry Timoshkov
dmitry at baikal.ru
Sun Feb 24 23:31:12 CST 2013
This fixes printing of images with true alpha channel.
---
dlls/gdiplus/graphics.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/dlls/gdiplus/graphics.c b/dlls/gdiplus/graphics.c
index 01e127c..853027c 100644
--- a/dlls/gdiplus/graphics.c
+++ b/dlls/gdiplus/graphics.c
@@ -398,8 +398,11 @@ static GpStatus alpha_blend_hdc_pixels(GpGraphics *graphics, INT dst_x, INT dst_
hbitmap = CreateDIBSection(hdc, (BITMAPINFO*)&bih, DIB_RGB_COLORS,
(void**)&temp_bits, NULL, 0);
- convert_32bppARGB_to_32bppPARGB(src_width, src_height, temp_bits,
- 4 * src_width, src, src_stride);
+ if (GetDeviceCaps(graphics->hdc, SHADEBLENDCAPS) == SB_NONE)
+ memcpy(temp_bits, src, src_width * src_height * 4);
+ else
+ convert_32bppARGB_to_32bppPARGB(src_width, src_height, temp_bits,
+ 4 * src_width, src, src_stride);
SelectObject(hdc, hbitmap);
gdi_alpha_blend(graphics, dst_x, dst_y, src_width, src_height,
--
1.8.1.3
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