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glsl: Implement TEX ImageSample functions

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This commit is contained in:
ameerj 2021-05-29 01:06:29 -04:00
parent b98de76ea8
commit 55e0211a5e
3 changed files with 71 additions and 11 deletions
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71
src/shader_recompiler/backend/glsl/emit_glsl_image.cpp
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@ -10,7 +10,7 @@
namespace Shader::Backend::GLSL {
namespace {
std::string Texture(EmitContext& ctx, IR::TextureInstInfo info,
std::string Texture(EmitContext& ctx, const IR::TextureInstInfo& info,
[[maybe_unused]] const IR::Value& index) {
if (info.type == TextureType::Buffer) {
throw NotImplementedException("TextureType::Buffer");
@ -18,6 +18,32 @@ std::string Texture(EmitContext& ctx, IR::TextureInstInfo info,
return fmt::format("tex{}", ctx.texture_bindings.at(info.descriptor_index));
}
}
std::string CastToIntVec(std::string_view value, const IR::TextureInstInfo& info) {
switch (info.type) {
case TextureType::Color1D:
return fmt::format("int({})", value);
case TextureType::ColorArray1D:
case TextureType::Color2D:
return fmt::format("ivec2({})", value);
case TextureType::ColorArray2D:
case TextureType::Color3D:
case TextureType::ColorCube:
return fmt::format("ivec3({})", value);
case TextureType::ColorArrayCube:
return fmt::format("ivec4({})", value);
default:
throw NotImplementedException("Offset type {}", info.type.Value());
}
}
IR::Inst* PrepareSparse(IR::Inst& inst) {
const auto sparse_inst{inst.GetAssociatedPseudoOperation(IR::Opcode::GetSparseFromOp)};
if (sparse_inst) {
sparse_inst->Invalidate();
}
return sparse_inst;
}
} // namespace
void EmitImageSampleImplicitLod([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] IR::Inst& inst,
@ -26,18 +52,30 @@ void EmitImageSampleImplicitLod([[maybe_unused]] EmitContext& ctx, [[maybe_unuse
[[maybe_unused]] std::string_view bias_lc,
[[maybe_unused]] const IR::Value& offset) {
const auto info{inst.Flags<IR::TextureInstInfo>()};
if (info.has_bias) {
throw NotImplementedException("Bias texture samples");
}
if (info.has_lod_clamp) {
throw NotImplementedException("Lod clamp samples");
}
const auto texture{Texture(ctx, info, index)};
const auto bias{info.has_bias ? fmt::format(",{}", bias_lc) : ""};
const auto texel{ctx.reg_alloc.Define(inst, Type::F32x4)};
const auto sparse_inst{PrepareSparse(inst)};
if (!sparse_inst) {
if (!offset.IsEmpty()) {
ctx.Add("{}=textureOffset({},{},{}{});", texel, texture, coords,
CastToIntVec(ctx.reg_alloc.Consume(offset), info), bias);
} else {
ctx.Add("{}=texture({},{}{});", texel, texture, coords, bias);
}
return;
}
// TODO: Query sparseTexels extension support
if (!offset.IsEmpty()) {
ctx.AddF32x4("{}=textureOffset({},{},ivec2({}));", inst, texture, coords,
ctx.reg_alloc.Consume(offset));
ctx.AddU1("{}=sparseTexelsResidentARB(sparseTextureOffsetARB({},{},{},{}{}));",
*sparse_inst, texture, coords, CastToIntVec(ctx.reg_alloc.Consume(offset), info),
texel, bias);
} else {
ctx.AddF32x4("{}=texture({},{});", inst, texture, coords);
ctx.AddU1("{}=sparseTexelsResidentARB(sparseTextureARB({},{},{}{}));", *sparse_inst,
texture, coords, texel, bias);
}
}
@ -54,11 +92,24 @@ void EmitImageSampleExplicitLod([[maybe_unused]] EmitContext& ctx, [[maybe_unuse
throw NotImplementedException("Lod clamp samples");
}
const auto texture{Texture(ctx, info, index)};
const auto texel{ctx.reg_alloc.Define(inst, Type::F32x4)};
const auto sparse_inst{PrepareSparse(inst)};
if (!sparse_inst) {
if (!offset.IsEmpty()) {
ctx.Add("{}=textureLodOffset({},{},{},{});", texel, texture, coords, lod_lc,
CastToIntVec(ctx.reg_alloc.Consume(offset), info));
} else {
ctx.Add("{}=textureLod({},{},{});", texel, texture, coords, lod_lc);
}
return;
}
if (!offset.IsEmpty()) {
ctx.AddF32x4("{}=textureLodOffset({},{},{},ivec2({}));", inst, texture, coords, lod_lc,
ctx.reg_alloc.Consume(offset));
ctx.AddU1("{}=sparseTexelsResidentARB(sparseTexelFetchOffsetARB({},{},int({}),{},{}));",
*sparse_inst, texture, CastToIntVec(coords, info), lod_lc,
CastToIntVec(ctx.reg_alloc.Consume(offset), info), texel);
} else {
ctx.AddF32x4("{}=textureLod({},{},{});", inst, texture, coords, lod_lc);
ctx.AddU1("{}=sparseTexelsResidentARB(sparseTextureLodARB({},{},{},{}));", *sparse_inst,
texture, coords, lod_lc, texel);
}
}