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VertexShaderGen: Clamp to the console depth range. 

This fixes the Mii Channel among others.
This commit is contained in:
Jules Blok 2016-08-04 18:27:12 +02:00
parent 92aa7669b5
commit 159247f4ad
1 changed files with 4 additions and 0 deletions
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4
Source/Core/VideoCommon/VertexShaderGen.cpp
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@ -403,6 +403,10 @@ ShaderCode GenerateVertexShaderCode(APIType api_type, const vertex_shader_uid_da
// the normal depth range of 0..1.
out.Write("o.pos.z = o.pos.w * " I_PIXELCENTERCORRECTION".w + o.pos.z * " I_PIXELCENTERCORRECTION".z;\n");
// We have to clamp to 2^24 - 1 here, because we map our depth range to 0..2^24 to prevent round-trip errors.
// Thus we test for values that will result in 2^24 or higher after the perspective divide.
out.Write("if (o.pos.z / o.pos.w >= 1.0) o.pos.z = 16777215.0 / 16777216.0 * o.pos.w;\n");
// write the true depth value, if the game uses depth textures pixel shaders will override with
// the correct values
// if not early z culling will improve speed