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D3D: Depth range inversion.

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Credits go to Galop1n for designing this technique and to BhaaLseN for cleaning up the commit.
This commit is contained in:
galop1n
2015-05-24 14:44:25 +02:00
committed by Jules Blok
parent 308b72d376
commit 2975e53091
6 changed files with 36 additions and 16 deletions
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17
Source/Core/VideoCommon/PixelShaderGen.cpp
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@ -582,7 +582,10 @@ static inline void GeneratePixelShader(T& out, DSTALPHA_MODE dstAlphaMode, API_T
}
else
{
out.Write("\tint zCoord = int(rawpos.z * 16777216.0);\n");
if (ApiType == API_D3D)
out.Write("\tint zCoord = int((1.0 - rawpos.z) * 16777216.0);\n");
else
out.Write("\tint zCoord = int(rawpos.z * 16777216.0);\n");
}
out.Write("\tzCoord = clamp(zCoord, " I_ZBIAS"[1].x - " I_ZBIAS"[1].y, " I_ZBIAS"[1].x);\n");
@ -600,7 +603,10 @@ static inline void GeneratePixelShader(T& out, DSTALPHA_MODE dstAlphaMode, API_T
// Note: z-textures are not written to depth buffer if early depth test is used
if (per_pixel_depth && bpmem.UseEarlyDepthTest())
{
out.Write("\tdepth = float(zCoord) / 16777216.0;\n");
if (ApiType == API_D3D)
out.Write("\tdepth = 1.0 - float(zCoord) / 16777216.0;\n");
else
out.Write("\tdepth = float(zCoord) / 16777216.0;\n");
}
// Note: depth texture output is only written to depth buffer if late depth test is used
@ -616,7 +622,10 @@ static inline void GeneratePixelShader(T& out, DSTALPHA_MODE dstAlphaMode, API_T
if (per_pixel_depth && bpmem.UseLateDepthTest())
{
out.Write("\tdepth = float(zCoord) / 16777216.0;\n");
if (ApiType == API_D3D)
out.Write("\tdepth = 1.0 - float(zCoord) / 16777216.0;\n");
else
out.Write("\tdepth = float(zCoord) / 16777216.0;\n");
}
if (dstAlphaMode == DSTALPHA_ALPHA_PASS)
@ -1129,7 +1138,7 @@ static inline void WriteAlphaTest(T& out, pixel_shader_uid_data* uid_data, API_T
if (dstAlphaMode == DSTALPHA_DUAL_SOURCE_BLEND)
out.Write("\t\tocol1 = float4(0.0, 0.0, 0.0, 0.0);\n");
if (per_pixel_depth)
out.Write("\t\tdepth = 1.0;\n");
out.Write("\t\tdepth = %s;\n", (ApiType == API_D3D) ? "0.0" : "1.0");
// ZCOMPLOC HACK:
// The only way to emulate alpha test + early-z is to force early-z in the shader.