Re: gdiplus: Use StretchBlt instead of GdiAlphaBlend if device doesn't support alpha blending. Resend.
Dmitry Timoshkov <dmitry(a)baikal.ru> wrote:
This patch makes printing of PNG and other images work from applications which use gdiplus for that.
Printer drivers can't support transparency or alpha blending in any way. This patch was tested with wide range of images (some mixed with other graphics and text), and output matches what native gdiplus does.
Is there anything else I could provide in helping to get this patch accepted? -- Dmitry.
I think if you start by checking for CompositingModeSourceCopy and make sure you don't write the 100% transparent pixels, then force that mode on HDC's that can't alpha blend in a later patch, I'll support that. As it is now, I'm only neutral to this change. On Wed, Apr 18, 2012 at 9:58 AM, Dmitry Timoshkov <dmitry(a)baikal.ru> wrote:
Dmitry Timoshkov <dmitry(a)baikal.ru> wrote:
This patch makes printing of PNG and other images work from applications which use gdiplus for that.
Printer drivers can't support transparency or alpha blending in any way. This patch was tested with wide range of images (some mixed with other graphics and text), and output matches what native gdiplus does.
Is there anything else I could provide in helping to get this patch accepted?
-- Dmitry.
Vincent Povirk <madewokherd(a)gmail.com> wrote:
I think if you start by checking for CompositingModeSourceCopy and make sure you don't write the 100% transparent pixels, then force that mode on HDC's that can't alpha blend in a later patch, I'll support that. As it is now, I'm only neutral to this change.
I'm not planning to go that far, but I'll certainly look at problems (if any) caused by this patch. -- Dmitry.
participants (2)
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Dmitry Timoshkov -
Vincent Povirk