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(D3D12) precompute alpha before scaling when generating mipmaps.

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aliaspider 2018-02-09 16:33:08 +01:00
parent 6fe379d978
commit e11209ac79
1 changed files with 6 additions and 1 deletions
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7
gfx/drivers/d3d_shaders/mimpapgen_sm5.h
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@ -35,7 +35,12 @@ SRC(
float4 c = 0.0f; float4 c = 0.0f;
for (i = 0; i < 4; i++) for (i = 0; i < 4; i++)
for (j = 0; j < 4; j++) for (j = 0; j < 4; j++)
c += w[i] * w[j] * t0.SampleLevel(s0, texel_size * (DTid.xy + 0.5f * float2(i - 0.5f,j - 0.5f)), src_level); {
float4 c0 = t0.SampleLevel(s0, texel_size * (DTid.xy + 0.5f * float2(i - 0.5f,j - 0.5f)), src_level);
c0.rgb *= c0.a;
c += w[i] * w[j] * c0;
}
c.rgb /= c.a;
u0[DTid.xy] = c; u0[DTid.xy] = c;
return; return;