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Failed quick attempt at Z rounding in the vshader

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Henrik Rydgard 2015-08-25 01:26:29 +02:00
parent 1e8a1b801f
commit a5fb4cffd5
1 changed files with 9 additions and 3 deletions
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12
GPU/GLES/VertexShaderGenerator.cpp
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@ -357,6 +357,12 @@ void GenerateVertexShader(int prim, u32 vertType, char *buffer, bool useHWTransf
}
}
// Even with this we don't match, because the viewport is different I think.
// I think we need to apply viewportZ, round/floor, and then undo viewportZ.
WRITE(p, "\nvec4 depthRoundZ(vec4 v) {\n");
WRITE(p, " return vec4(v.x, v.y, (1.0/65536.0) * floor(v.z * 65536.0), v.w);\n");
WRITE(p, "}\n\n");
WRITE(p, "void main() {\n");
if (!useHWTransform) {
@ -381,9 +387,9 @@ void GenerateVertexShader(int prim, u32 vertType, char *buffer, bool useHWTransf
WRITE(p, " v_fogdepth = position.w;\n");
}
if (gstate.isModeThrough()) {
WRITE(p, " gl_Position = u_proj_through * vec4(position.xyz, 1.0);\n");
WRITE(p, " gl_Position = depthRoundZ(u_proj_through * vec4(position.xyz, 1.0));\n");
} else {
WRITE(p, " gl_Position = u_proj * vec4(position.xyz, 1.0);\n");
WRITE(p, " gl_Position = depthRoundZ(u_proj * vec4(position.xyz, 1.0));\n");
}
} else {
// Step 1: World Transform / Skinning
@ -476,7 +482,7 @@ void GenerateVertexShader(int prim, u32 vertType, char *buffer, bool useHWTransf
WRITE(p, " vec4 viewPos = u_view * vec4(worldpos, 1.0);\n");
// Final view and projection transforms.
WRITE(p, " gl_Position = u_proj * viewPos;\n");
WRITE(p, " gl_Position = depthRoundZ(u_proj * viewPos);\n");
// TODO: Declare variables for dots for shade mapping if needed.