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Add support for Dual source blending to older ATI cards that don't support 420pack but do support GL_ARB_blend_func_extended. This is more proper as well anyways.

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This commit is contained in:
Ryan Houdek
2011-12-29 00:32:06 -06:00
parent fbbea9bb9b
commit 8a48b42e4c
7 changed files with 53 additions and 27 deletions
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15
Source/Core/VideoCommon/Src/PixelShaderGen.cpp
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@ -568,6 +568,8 @@ const char *GeneratePixelShaderCode(DSTALPHA_MODE dstAlphaMode, API_TYPE ApiType
if (g_ActiveConfig.backend_info.bSupportsGLSLATTRBind)
WRITE(p, "#extension GL_ARB_explicit_attrib_location : enable\n");
if (g_ActiveConfig.backend_info.bSupportsGLSLBlend)
WRITE(p, "#extension GL_ARB_blend_func_extended : enable\n");
// Silly differences
WRITE(p, "#define float2 vec2\n");
WRITE(p, "#define float3 vec3\n");
@ -693,13 +695,20 @@ const char *GeneratePixelShaderCode(DSTALPHA_MODE dstAlphaMode, API_TYPE ApiType
{
// GLSL doesn't do main arguments
// Once we switch to GLSL 1.3 we will bind a lot of these.
if (dstAlphaMode == DSTALPHA_DUAL_SOURCE_BLEND)
{
// This won't get hit unless we support GL 3.3
WRITE(p, " layout(location = 0) out float4 ocol0;\n");
WRITE(p, " layout(location = 0, index = 1) out float4 ocol1;\n"); // Will be supported later
if (g_ActiveConfig.backend_info.bSupportsGLSLBinding)
{
WRITE(p, " layout(location = 0) out float4 ocol0;\n");
WRITE(p, " layout(location = 0, index = 1) out float4 ocol1;\n");
}
else
{
WRITE(p, " out float4 ocol0;\n");
WRITE(p, " out float4 ocol1;\n");
}
}
else
{