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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.

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
Source/Core/VideoCommon/Src/PixelShaderGen.cpp
View File

@ -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");
@ -694,12 +696,19 @@ 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
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"); // Will be supported later
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
{

1
Source/Core/VideoCommon/Src/VideoConfig.h
View File

@ -170,6 +170,7 @@ struct VideoConfig
bool bSupportsGLSL;
bool bSupportsGLSLBinding;
bool bSupportsGLSLBlend;
bool bSupportsGLSLUBO;
bool bSupportsGLSLATTRBind;
bool bSupportsGLSLCache;

1
Source/Plugins/Plugin_VideoOGL/Src/PixelShaderCache.cpp
View File

@ -406,7 +406,6 @@ bool CompileGLSLPixelShader(FRAGMENTSHADER& ps, const char* pstrprogram)
FILE *fp = fopen(szTemp, "wb");
fwrite(pstrprogram, strlen(pstrprogram), 1, fp);
fclose(fp);
delete[] infoLog;
}
// Don't try to use this shader

8
Source/Plugins/Plugin_VideoOGL/Src/ProgramShaderCache.cpp
View File

@ -91,6 +91,14 @@ void ProgramShaderCache::SetProgramVariables(PCacheEntry &entry)
if (entry.UniformLocations[a] != -1)
glUniform1i(entry.UniformLocations[a], a);
}
if (g_ActiveConfig.backend_info.bSupportsGLSLBlend)
{
// So we don't support binding, but we do support extended blending
// So we need to set a few more things here.
// Bind our out locations
glBindFragDataLocationIndexed(entry.prog_id, 0, 0, "ocol0");
glBindFragDataLocationIndexed(entry.prog_id, 0, 1, "ocol1");
}
}
// Need to get some attribute locations

13
Source/Plugins/Plugin_VideoOGL/Src/Render.cpp
View File

@ -316,6 +316,8 @@ Renderer::Renderer()
// TODO: Switch over to using glew once 1.6/1.7 becomes more mainstream, seems most people are stuck in 1.5
if (strstr((const char*)glGetString(GL_EXTENSIONS), "GL_ARB_shading_language_420pack") != NULL)
g_Config.backend_info.bSupportsGLSLBinding = true;
if (glewIsSupported("GL_ARB_blend_func_extended"))
g_Config.backend_info.bSupportsGLSLBlend = true;
if (strstr((const char*)glGetString(GL_EXTENSIONS), "GL_ARB_uniform_buffer_object") != NULL)
g_Config.backend_info.bSupportsGLSLUBO = true;
if ((g_Config.backend_info.bSupportsGLSLBinding || g_Config.backend_info.bSupportsGLSLUBO) && strstr((const char*)glGetString(GL_EXTENSIONS), "GL_ARB_explicit_attrib_location") != NULL)
@ -963,7 +965,7 @@ void Renderer::SetBlendMode(bool forceUpdate)
bool useDstAlpha = !g_ActiveConfig.bDstAlphaPass && bpmem.dstalpha.enable && bpmem.blendmode.alphaupdate
&& bpmem.zcontrol.pixel_format == PIXELFMT_RGBA6_Z24;
bool useDualSource = useDstAlpha && g_ActiveConfig.bUseGLSL && g_ActiveConfig.backend_info.bSupportsGLSLBinding;
bool useDualSource = useDstAlpha && g_ActiveConfig.bUseGLSL && g_ActiveConfig.backend_info.bSupportsGLSLBlend;
if (changes & 1)
// blend enable change
@ -974,10 +976,16 @@ void Renderer::SetBlendMode(bool forceUpdate)
// subtract enable change
GLenum equation = newval & 4 ? GL_FUNC_REVERSE_SUBTRACT : GL_FUNC_ADD;
GLenum equationAlpha = useDualSource ? GL_FUNC_ADD : equation;
if (g_ActiveConfig.backend_info.bSupportsGLSLBlend)
glBlendEquationSeparate(equation, equationAlpha);
else
glBlendEquation(newval & 4 ? GL_FUNC_REVERSE_SUBTRACT : GL_FUNC_ADD);
}
if (changes & 0x1F8)
{
if (g_ActiveConfig.backend_info.bSupportsGLSLBlend)
{
GLenum srcFactor = glSrcFactors[(newval >> 3) & 7];
GLenum srcFactorAlpha = srcFactor;
@ -1002,6 +1010,9 @@ void Renderer::SetBlendMode(bool forceUpdate)
// blend RGB change
glBlendFuncSeparate(srcFactor, dstFactor, srcFactorAlpha, dstFactorAlpha);
}
else
glBlendFunc(glSrcFactors[(newval >> 3) & 7], glDestFactors[(newval >> 6) & 7]);
}
s_blendMode = newval;
}

2
Source/Plugins/Plugin_VideoOGL/Src/VertexManager.cpp
View File

@ -178,7 +178,7 @@ void VertexManager::vFlush()
&& bpmem.zcontrol.pixel_format == PIXELFMT_RGBA6_Z24;
// Makes sure we can actually do Dual source blending
bool dualSourcePossible = g_ActiveConfig.bUseGLSL && g_ActiveConfig.backend_info.bSupportsGLSLBinding;
bool dualSourcePossible = g_ActiveConfig.bUseGLSL && g_ActiveConfig.backend_info.bSupportsGLSLBlend;
// finally bind
FRAGMENTSHADER* ps;

2
Source/Plugins/Plugin_VideoOGL/Src/VertexShaderCache.cpp
View File

@ -204,14 +204,12 @@ bool CompileGLSLVertexShader(VERTEXSHADER& vs, const char* pstrprogram)
FILE *fp = fopen(szTemp, "wb");
fwrite(pstrprogram, strlen(pstrprogram), 1, fp);
fclose(fp);
delete[] infoLog;
}
// Don't try to use this shader
glDeleteShader(result);
return false;
}
(void)GL_REPORT_ERROR();
vs.glprogid = result;
vs.bGLSL = true;