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VideoCommon: Don't process the depth range in the vertex shader if it's not oversized.

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This commit is contained in:
Jules Blok
2016-11-23 23:25:44 +01:00
parent 8e506cb974
commit ef82aebb97
6 changed files with 48 additions and 44 deletions
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16
Source/Core/VideoCommon/VertexShaderGen.cpp
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@ -30,6 +30,10 @@ VertexShaderUid GetVertexShaderUid()
uid_data->msaa = g_ActiveConfig.iMultisamples > 1;
uid_data->ssaa = g_ActiveConfig.iMultisamples > 1 && g_ActiveConfig.bSSAA;
uid_data->numColorChans = xfmem.numChan.numColorChans;
uid_data->vertex_depth =
g_ActiveConfig.backend_info.bSupportsDepthClamp &&
((fabs(xfmem.viewport.zRange) > 16777215.0f || fabs(xfmem.viewport.farZ) > 16777215.0f) ||
(xfmem.viewport.zRange < 0.0f && !g_ActiveConfig.backend_info.bSupportsReversedDepthRange));
GetLightingShaderUid(uid_data->lighting);
@ -416,13 +420,10 @@ ShaderCode GenerateVertexShaderCode(APIType api_type, const vertex_shader_uid_da
out.Write("o.colors_1 = color1;\n");
}
// Write the true depth value. If the game uses depth textures, then the pixel shader will
// override it with the correct values if not then early z culling will improve speed.
// If we can disable the incorrect depth clipping planes using depth clamping, then we can do
// our own depth clipping and calculate the depth range before the perspective divide.
if (g_ActiveConfig.backend_info.bSupportsDepthClamp)
{
// If we can disable the incorrect depth clipping planes using depth clamping, then we can do
// our own depth clipping and calculate the depth range before the perspective divide.
// Since we're adjusting z for the depth range before the perspective divide, we have to do our
// own clipping. We want to clip so that -w <= z <= 0, which matches the console -1..0 range.
// We adjust our depth value for clipping purposes to match the perspective projection in the
@ -430,7 +431,12 @@ ShaderCode GenerateVertexShaderCode(APIType api_type, const vertex_shader_uid_da
out.Write("float clipDepth = o.pos.z * (1.0 - 1e-7);\n");
out.Write("o.clipDist0 = clipDepth + o.pos.w;\n"); // Near: z < -w
out.Write("o.clipDist1 = -clipDepth;\n"); // Far: z > 0
}
// Write the true depth value. If the game uses depth textures, then the pixel shader will
// override it with the correct values if not then early z culling will improve speed.
if (uid_data->vertex_depth)
{
// Adjust z for the depth range. We're using an equation which incorperates a depth inversion,
// so we can map the console -1..0 range to the 0..1 range used in the depth buffer.
// We have to handle the depth range in the vertex shader instead of after the perspective