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Commit 9edebd68 by Nicolas Capens
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Implement mipmapping for integer samplers.

TRAC #23655 Signed-off-by: Geoff Lang Signed-off-by: Shannon Woods Author: Nicolas Capens
parent 0fe1949d
Showing with 82 additions and 7 deletions
src/compiler/OutputHLSL.cpp
......@@ -1043,19 +1043,94 @@ void OutputHLSL::header()
{
if (IsSamplerArray(textureFunction->sampler))
{
out << " float width; float height; float layers;\n"
" x.GetDimensions(width, height, layers);\n";
out << " float width; float height; float layers; float levels;\n";
if (textureFunction->method == TextureFunction::LOD0)
{
out << " uint mip = 0;\n";
}
else
{
if (textureFunction->method == TextureFunction::IMPLICIT ||
textureFunction->method == TextureFunction::BIAS)
{
out << " x.GetDimensions(0, width, height, layers, levels);\n"
" float2 tSized = float2(t.x * width, t.y * height);\n"
" float dx = length(ddx(tSized));\n"
" float dy = length(ddy(tSized));\n"
" float lod = log2(max(sqrt(dx), sqrt(dy)));\n";
if (textureFunction->method == TextureFunction::BIAS)
{
out << " lod += bias;\n";
}
}
out << " uint mip = uint(min(max(round(lod), 0), levels - 1));\n";
}
out << " x.GetDimensions(mip, width, height, layers, levels);\n";
}
else
{
out << " float width; float height;\n"
" x.GetDimensions(width, height);\n";
out << " float width; float height; float levels;\n";
if (textureFunction->method == TextureFunction::LOD0)
{
out << " uint mip = 0;\n";
}
else
{
if (textureFunction->method == TextureFunction::IMPLICIT ||
textureFunction->method == TextureFunction::BIAS)
{
out << " x.GetDimensions(0, width, height, levels);\n"
" float2 tSized = float2(t.x * width, t.y * height);\n"
" float dx = length(ddx(tSized));\n"
" float dy = length(ddy(tSized));\n"
" float lod = log2(max(sqrt(dx), sqrt(dy)));\n";
if (textureFunction->method == TextureFunction::BIAS)
{
out << " lod += bias;\n";
}
}
out << " uint mip = uint(min(max(round(lod), 0), levels - 1));\n";
}
out << " x.GetDimensions(mip, width, height, levels);\n";
}
}
else if (IsSampler3D(textureFunction->sampler))
{
out << " float width; float height; float depth;\n"
" x.GetDimensions(width, height, depth);\n";
out << " float width; float height; float depth; float levels;\n";
if (textureFunction->method == TextureFunction::LOD0)
{
out << " uint mip = 0;\n";
}
else
{
if (textureFunction->method == TextureFunction::IMPLICIT ||
textureFunction->method == TextureFunction::BIAS)
{
out << " x.GetDimensions(0, width, height, depth, levels);\n"
" float3 tSized = float3(t.x * width, t.y * height, t.z * depth);\n"
" float dx = length(ddx(tSized));\n"
" float dy = length(ddy(tSized));\n"
" float lod = log2(max(sqrt(dx), sqrt(dy)));\n";
if (textureFunction->method == TextureFunction::BIAS)
{
out << " lod += bias;\n";
}
}
out << " uint mip = uint(min(max(round(lod), 0), levels - 1));\n";
}
out << " x.GetDimensions(mip, width, height, depth, levels);\n";
}
else UNREACHABLE();
}
......@@ -1195,7 +1270,7 @@ void OutputHLSL::header()
if (IsIntegerSampler(textureFunction->sampler))
{
out << ", 0));"; // Sample from the top level
out << ", mip));";
}
else if (IsShadowSampler(textureFunction->sampler))
{
......
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