diff options
| author | Jules Blok <jules.blok@gmail.com> | 2014-10-30 02:08:15 +0100 |
|---|---|---|
| committer | Jules Blok <jules.blok@gmail.com> | 2014-11-23 14:27:38 +0100 |
| commit | 6cacfad010b05cd9d79056a81c4dc7d19ca57273 (patch) | |
| tree | 24a3879f82ddf899f39313bebe84322404833d2d /Source/Core/VideoCommon/GeometryShaderGen.cpp | |
| parent | 4fd943aedd9d2fbc59cd1d5181630da128e7446a (diff) | |
GeometryShader: Transform the projection within the geometry shader.
Reduces the amount of data transferred through uniforms.
The shearing transformation is reduced to a single multiplication/addition for optimization.
Diffstat (limited to 'Source/Core/VideoCommon/GeometryShaderGen.cpp')
| -rw-r--r-- | Source/Core/VideoCommon/GeometryShaderGen.cpp | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/Source/Core/VideoCommon/GeometryShaderGen.cpp b/Source/Core/VideoCommon/GeometryShaderGen.cpp index f016acd6f4..6a39e2ca1d 100644 --- a/Source/Core/VideoCommon/GeometryShaderGen.cpp +++ b/Source/Core/VideoCommon/GeometryShaderGen.cpp @@ -70,16 +70,18 @@ static inline void GenerateGeometryShader(T& out, u32 components, API_TYPE ApiTy out.Write("flat out int layer;\n"); out.Write("void main()\n{\n"); - if (!g_ActiveConfig.backend_info.bSupportsGSInstancing) + if (g_ActiveConfig.backend_info.bSupportsGSInstancing) + out.Write("\tlayer = gl_InvocationID;\n"); + else out.Write("\tfor (layer = 0; layer < %d; ++layer) {\n", g_ActiveConfig.bStereo ? 2 : 1); + out.Write("\tgl_Layer = layer;\n"); + out.Write("\tvec4 stereoproj = "I_PROJECTION"[0];\n"); + out.Write("\tstereoproj[2] += "I_STEREOOFFSET"[layer] * stereoproj[0];\n"); out.Write("\tfor (int i = 0; i < gl_in.length(); ++i) {\n"); out.Write("\t\to = v[i];\n"); - if (g_ActiveConfig.backend_info.bSupportsGSInstancing) - out.Write("\t\tlayer = gl_InvocationID;\n"); if (g_ActiveConfig.bStereo) - out.Write("\t\to.pos = float4(dot(" I_STEREOPROJECTION"[layer * 4 + 0], v[i].rawpos), dot(" I_STEREOPROJECTION"[layer * 4 + 1], v[i].rawpos), dot(" I_STEREOPROJECTION"[layer * 4 + 2], v[i].rawpos), dot(" I_STEREOPROJECTION"[layer * 4 + 3], v[i].rawpos)); \n"); + out.Write("\t\to.pos = float4(dot(stereoproj, v[i].rawpos), dot(" I_PROJECTION"[1], v[i].rawpos), dot(" I_PROJECTION"[2], v[i].rawpos), dot(" I_PROJECTION"[3], v[i].rawpos)); \n"); out.Write("\t\tgl_Position = o.pos;\n"); - out.Write("\t\tgl_Layer = layer;\n"); out.Write("\t\tEmitVertex();\n"); out.Write("\t}\n"); out.Write("\tEndPrimitive();\n"); |