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OpenGL plugin: Support for dual-source blending, CURRENTLY DISABLED. It doesn't work yet. To fix it, we may need to convert all our shaders to GLSL so that we can use glBindFragDataLocation.

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@6306 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
Nolan Check
2010-10-23 19:55:19 +00:00
parent 91186d2b8a
commit 2ec3db44ed
5 changed files with 67 additions and 11 deletions
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38
Source/Plugins/Plugin_VideoOGL/Src/Render.cpp
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@ -151,7 +151,7 @@ static const GLenum glSrcFactors[8] =
GL_DST_COLOR,
GL_ONE_MINUS_DST_COLOR,
GL_SRC_ALPHA,
GL_ONE_MINUS_SRC_ALPHA,
GL_ONE_MINUS_SRC_ALPHA, // NOTE: If dual-source blending is enabled, use SRC1_ALPHA
GL_DST_ALPHA,
GL_ONE_MINUS_DST_ALPHA
};
@ -162,7 +162,7 @@ static const GLenum glDestFactors[8] = {
GL_SRC_COLOR,
GL_ONE_MINUS_SRC_COLOR,
GL_SRC_ALPHA,
GL_ONE_MINUS_SRC_ALPHA,
GL_ONE_MINUS_SRC_ALPHA, // NOTE: If dual-source blending is enabled, use SRC1_ALPHA
GL_DST_ALPHA,
GL_ONE_MINUS_DST_ALPHA
};
@ -1034,17 +1034,47 @@ void Renderer::SetBlendMode(bool forceUpdate)
u32 changes = forceUpdate ? 0xFFFFFFFF : newval ^ s_blendMode;
bool useDstAlpha = !g_ActiveConfig.bDstAlphaPass && bpmem.dstalpha.enable && bpmem.blendmode.alphaupdate
&& bpmem.zcontrol.pixel_format == PIXELFMT_RGBA6_Z24;
bool useDualSource = USE_DUAL_SOURCE_BLEND && useDstAlpha && GLEW_ARB_blend_func_extended;
if (changes & 1)
// blend enable change
(newval & 1) ? glEnable(GL_BLEND) : glDisable(GL_BLEND);
if (changes & 4)
{
// subtract enable change
glBlendEquation(newval & 4 ? GL_FUNC_REVERSE_SUBTRACT : GL_FUNC_ADD);
GLenum equation = newval & 4 ? GL_FUNC_REVERSE_SUBTRACT : GL_FUNC_ADD;
GLenum equationAlpha = useDualSource ? GL_FUNC_ADD : equation;
glBlendEquationSeparate(equation, equationAlpha);
}
if (changes & 0x1F8)
{
GLenum srcFactor = glSrcFactors[(newval >> 3) & 7];
GLenum srcFactorAlpha = srcFactor;
GLenum dstFactor = glDestFactors[(newval >> 6) & 7];
GLenum dstFactorAlpha = dstFactor;
if (useDualSource)
{
srcFactorAlpha = GL_ONE;
dstFactorAlpha = GL_ZERO;
if (srcFactor == GL_SRC_ALPHA)
srcFactor = GL_SRC1_ALPHA;
else if (srcFactor == GL_ONE_MINUS_SRC_ALPHA)
srcFactor = GL_ONE_MINUS_SRC1_ALPHA;
if (dstFactor == GL_SRC_ALPHA)
dstFactor = GL_SRC1_ALPHA;
else if (dstFactor == GL_ONE_MINUS_SRC_ALPHA)
dstFactor = GL_ONE_MINUS_SRC1_ALPHA;
}
// blend RGB change
glBlendFunc(glSrcFactors[(newval >> 3) & 7], glDestFactors[(newval >> 6) & 7]);
glBlendFuncSeparate(srcFactor, dstFactor, srcFactorAlpha, dstFactorAlpha);
}
s_blendMode = newval;
}