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Change destination alpha handling. The blending method introduced in rev 1921 was not the correct way to do it. This way was suggested by hrydgard in October and I should have listened. A simple pixel shader as hrydgard suggested cannot be used because the alpha is not set if the pixel is discarded due to failing depth (after z texture) or alpha (result of tev stages) tests. There is a bit of a performance hit so there should be an option to disable the second render pass which sets the alpha because it is probably not needed most of the time.

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@2662 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
donkopunchstania
2009-03-16 02:47:48 +00:00
parent b1b2868c8b
commit 90254bd924
8 changed files with 59 additions and 65 deletions
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8
Source/Plugins/Plugin_VideoOGL/Src/PixelShaderCache.cpp
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@ -105,13 +105,14 @@ GLuint PixelShaderCache::GetColorMatrixProgram()
}
FRAGMENTSHADER* PixelShaderCache::GetShader()
FRAGMENTSHADER* PixelShaderCache::GetShader(bool dstAlphaEnable)
{
DVSTARTPROFILE();
PIXELSHADERUID uid;
u32 zbufrender = (Renderer::UseFakeZTarget() && bpmem.zmode.updateenable) ? 1 : 0;
u32 zBufRenderToCol0 = Renderer::GetRenderMode() != Renderer::RM_Normal;
GetPixelShaderId(uid, PixelShaderManager::GetTextureMask(), zbufrender, zBufRenderToCol0);
u32 dstAlpha = dstAlphaEnable ? 1 : 0;
GetPixelShaderId(uid, PixelShaderManager::GetTextureMask(), zbufrender, zBufRenderToCol0, dstAlpha);
PSCache::iterator iter = pshaders.find(uid);
@ -128,7 +129,8 @@ FRAGMENTSHADER* PixelShaderCache::GetShader()
PSCacheEntry& newentry = pshaders[uid];
const char *code = GeneratePixelShader(PixelShaderManager::GetTextureMask(),
Renderer::UseFakeZTarget(),
Renderer::GetRenderMode() != Renderer::RM_Normal);
Renderer::GetRenderMode() != Renderer::RM_Normal,
dstAlphaEnable);
#if defined(_DEBUG) || defined(DEBUGFAST)
if (g_Config.iLog & CONF_SAVESHADERS && code) {