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76b7b1e9
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2013-08-16T09:20:33
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Fixed alpha composition when destination alpha is transparent.
Jianyu Guan
I found I make a big mistake that when dstA==0, I just simply let *dstp=*srcp and forgot to make dstRGB = srcRGB*srcA.
The if consition "(*dstp & amask) == 0" in BlitRGBtoRGBPixelAlphaMMX and BlitRGBtoRGBPixelAlphaMMX3dNow should be removed.
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89bc80f1
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2013-08-16T06:59:19
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Fixed alpha blending for the MMX blit functions
I see the Remarks of function SDL_BlitSurface shows that "when SDL_BLENDMODE_BLEND, we have dstA = srcA + (dstA * (1-srcA))". however, I tested some pictures but the result implies "dstA=arcA" actually. I stepped into the source code, and found after I set SDL_BLENDMODE_BLEND for the source surface, the final blit function is BlitRGBtoRGBPixelAlphaMMX when I use SDL_BlitSurface on my computer. And I found these codes:
else if (alpha == amask) {
/* opaque alpha -- copy RGB, keep dst alpha */
*dstp = (*srcp & chanmask) | (*dstp & ~chanmask);
The same code is used in BlitRGBtoRGBPixelAlphaMMX3DNOW and BlitRGBtoRGBPixelAlpha. So I think they still keep dst alpha.
Best regards,
Jianyu Guan
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65728477
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2013-08-14T23:30:10
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Fix bug 2034: replace printf by SDL_Log in tests; update loopwave VS solution: copy missing dependency
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67367be0
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2013-08-12T22:00:21
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Don't print "unrecognized key" message for an X11 keycode of 0. This can happen with composed characters.
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5d1865c2
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2013-08-12T19:18:48
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Fixed the tag name for the SDL 2.0 release
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14bf230d
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2013-08-12T11:09:13
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Mac: Fix restoring of Cmd-H-hidden fullscreen desktop windows.
This should fix http://bugzilla.libsdl.org/show_bug.cgi?id=1996
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a84a97fe
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2013-08-12T08:45:37
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Added Julian Winter to the credits for the SDL 2.0 website.
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03477ef6
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2013-08-12T08:40:49
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Added tag release_2.0.0 for changeset d4ce48ff30d1
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dad42067
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2013-08-12T11:13:50
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Fixes #2022, do not resume on Android when surfaceChanged
If the app is in landscape mode and the user presses the power button, a pause
is followed immediately by a surfaceChanged event because the lock screen
is shown in portrait mode. This triggers a "false" resume.
So, we just pause and resume following the onWindowFocusChanged events.
Also, wait for SDL_APP_WILLENTERBACKGROUND and SDL_APP_DIDENTERBACKGROUND before
blocking the event pump.
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