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Merge pull request #1089 from LoopDawg/split-shadow-tx

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HLSL: split textures used for both shadow and non-shadow modes
This commit is contained in:
John Kessenich 2017-10-07 00:33:20 +03:00 committed by GitHub
commit 908813c25d
6 changed files with 260 additions and 34 deletions
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157
Test/baseResults/hlsl.samplecmp.dualmode.frag.out Normal file
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@ -0,0 +1,157 @@
hlsl.samplecmp.dualmode.frag
WARNING: AST will form illegal SPIR-V; need to transform to legalize
Shader version: 500
gl_FragCoord origin is upper left
0:? Sequence
0:7 Function Definition: @main( ( temp 4-component vector of float)
0:7 Function Parameters:
0:? Sequence
0:10 texture ( temp float)
0:10 Construct combined texture-sampler ( temp sampler1DShadow)
0:10 'g_tTex' (layout( binding=3) uniform texture1DShadow)
0:10 'g_sSampCmp' (layout( binding=1) uniform sampler)
0:10 Construct vec2 ( temp 2-component vector of float)
0:10 Constant:
0:10 0.100000
0:10 Constant:
0:10 0.750000
0:11 texture ( temp 4-component vector of float)
0:11 Construct combined texture-sampler ( temp sampler1D)
0:11 'g_tTex' (layout( binding=3) uniform texture1D)
0:11 'g_sSamp' (layout( binding=0) uniform sampler)
0:11 Constant:
0:11 0.100000
0:13 Branch: Return with expression
0:13 Constant:
0:13 0.000000
0:13 0.000000
0:13 0.000000
0:13 0.000000
0:7 Function Definition: main( ( temp void)
0:7 Function Parameters:
0:? Sequence
0:7 move second child to first child ( temp 4-component vector of float)
0:? '@entryPointOutput' (layout( location=0) out 4-component vector of float)
0:7 Function Call: @main( ( temp 4-component vector of float)
0:? Linker Objects
0:? 'g_sSamp' (layout( binding=0) uniform sampler)
0:? 'g_sSampCmp' (layout( binding=1) uniform sampler)
0:? 'g_tTex' (layout( binding=3) uniform texture1DShadow)
0:? '@entryPointOutput' (layout( location=0) out 4-component vector of float)
0:? 'g_tTex' (layout( binding=3) uniform texture1D)
Linked fragment stage:
Shader version: 500
gl_FragCoord origin is upper left
0:? Sequence
0:7 Function Definition: @main( ( temp 4-component vector of float)
0:7 Function Parameters:
0:? Sequence
0:10 texture ( temp float)
0:10 Construct combined texture-sampler ( temp sampler1DShadow)
0:10 'g_tTex' (layout( binding=3) uniform texture1DShadow)
0:10 'g_sSampCmp' (layout( binding=1) uniform sampler)
0:10 Construct vec2 ( temp 2-component vector of float)
0:10 Constant:
0:10 0.100000
0:10 Constant:
0:10 0.750000
0:11 texture ( temp 4-component vector of float)
0:11 Construct combined texture-sampler ( temp sampler1D)
0:11 'g_tTex' (layout( binding=3) uniform texture1D)
0:11 'g_sSamp' (layout( binding=0) uniform sampler)
0:11 Constant:
0:11 0.100000
0:13 Branch: Return with expression
0:13 Constant:
0:13 0.000000
0:13 0.000000
0:13 0.000000
0:13 0.000000
0:7 Function Definition: main( ( temp void)
0:7 Function Parameters:
0:? Sequence
0:7 move second child to first child ( temp 4-component vector of float)
0:? '@entryPointOutput' (layout( location=0) out 4-component vector of float)
0:7 Function Call: @main( ( temp 4-component vector of float)
0:? Linker Objects
0:? 'g_sSamp' (layout( binding=0) uniform sampler)
0:? 'g_sSampCmp' (layout( binding=1) uniform sampler)
0:? 'g_tTex' (layout( binding=3) uniform texture1DShadow)
0:? '@entryPointOutput' (layout( location=0) out 4-component vector of float)
0:? 'g_tTex' (layout( binding=3) uniform texture1D)
// Module Version 10000
// Generated by (magic number): 80001
// Id's are bound by 43
Capability Shader
Capability Sampled1D
1: ExtInstImport "GLSL.std.450"
MemoryModel Logical GLSL450
EntryPoint Fragment 4 "main" 41
ExecutionMode 4 OriginUpperLeft
Source HLSL 500
Name 4 "main"
Name 9 "@main("
Name 13 "g_tTex"
Name 17 "g_sSampCmp"
Name 29 "g_tTex"
Name 31 "g_sSamp"
Name 41 "@entryPointOutput"
Decorate 13(g_tTex) DescriptorSet 0
Decorate 13(g_tTex) Binding 3
Decorate 17(g_sSampCmp) DescriptorSet 0
Decorate 17(g_sSampCmp) Binding 1
Decorate 29(g_tTex) DescriptorSet 0
Decorate 29(g_tTex) Binding 3
Decorate 31(g_sSamp) DescriptorSet 0
Decorate 31(g_sSamp) Binding 0
Decorate 41(@entryPointOutput) Location 0
2: TypeVoid
3: TypeFunction 2
6: TypeFloat 32
7: TypeVector 6(float) 4
8: TypeFunction 7(fvec4)
11: TypeImage 6(float) 1D depth sampled format:Unknown
12: TypePointer UniformConstant 11
13(g_tTex): 12(ptr) Variable UniformConstant
15: TypeSampler
16: TypePointer UniformConstant 15
17(g_sSampCmp): 16(ptr) Variable UniformConstant
19: TypeSampledImage 11
21: 6(float) Constant 1036831949
22: 6(float) Constant 1061158912
23: TypeVector 6(float) 2
27: TypeImage 6(float) 1D sampled format:Unknown
28: TypePointer UniformConstant 27
29(g_tTex): 28(ptr) Variable UniformConstant
31(g_sSamp): 16(ptr) Variable UniformConstant
33: TypeSampledImage 27
36: 6(float) Constant 0
37: 7(fvec4) ConstantComposite 36 36 36 36
40: TypePointer Output 7(fvec4)
41(@entryPointOutput): 40(ptr) Variable Output
4(main): 2 Function None 3
5: Label
42: 7(fvec4) FunctionCall 9(@main()
Store 41(@entryPointOutput) 42
Return
FunctionEnd
9(@main(): 7(fvec4) Function None 8
10: Label
14: 11 Load 13(g_tTex)
18: 15 Load 17(g_sSampCmp)
20: 19 SampledImage 14 18
24: 23(fvec2) CompositeConstruct 21 22
25: 6(float) CompositeExtract 24 1
26: 6(float) ImageSampleDrefImplicitLod 20 24 25
30: 27 Load 29(g_tTex)
32: 15 Load 31(g_sSamp)
34: 33 SampledImage 30 32
35: 7(fvec4) ImageSampleImplicitLod 34 21
ReturnValue 37
FunctionEnd

14
Test/hlsl.samplecmp.dualmode.frag Normal file
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@ -0,0 +1,14 @@
SamplerState g_sSamp : register(s0);
SamplerComparisonState g_sSampCmp : register(s1);
uniform Texture1D <float4> g_tTex : register(t3);
float4 main() : SV_Target0
{
// This texture is used with both shadow modes. It will need post-compilation
// legalization.
g_tTex.SampleCmp(g_sSampCmp, 0.1, 0.75);
g_tTex.Sample(g_sSamp, 0.1);
return 0;
}

1
glslang/Include/intermediate.h
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@ -979,6 +979,7 @@ public:
constSubtree(nullptr)
{ name = n; }
virtual int getId() const { return id; }
virtual void setId(int newId) { id = newId; }
virtual const TString& getName() const { return name; }
virtual void traverse(TIntermTraverser*);
virtual TIntermSymbol* getAsSymbolNode() { return this; }

1
gtests/Hlsl.FromFile.cpp
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@ -269,6 +269,7 @@ INSTANTIATE_TEST_CASE_P(
{"hlsl.samplebias.offsetarray.dx10.frag", "main"},
{"hlsl.samplecmp.array.dx10.frag", "main"},
{"hlsl.samplecmp.basic.dx10.frag", "main"},
{"hlsl.samplecmp.dualmode.frag", "main"},
{"hlsl.samplecmp.offset.dx10.frag", "main"},
{"hlsl.samplecmp.offsetarray.dx10.frag", "main"},
{"hlsl.samplecmp.negative.frag", "main"},

94
hlsl/hlslParseHelper.cpp
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@ -2936,37 +2936,66 @@ TIntermAggregate* HlslParseContext::handleSamplerTextureCombine(const TSourceLoc
TSampler samplerType = argTex->getType().getSampler();
samplerType.combined = true;
samplerType.shadow = argSampler->getType().getSampler().shadow;
// TODO:
// This block exists until the spec no longer requires shadow modes on texture objects.
// It can be deleted after that, along with the shadowTextureVariant member.
{
// ** TODO: **
// This forces the texture's shadow state to be the sampler's
// shadow state. This can't work if a single texture is used with
// both comparison and non-comparison samplers, so an error is
// reported if the shader does that.
//
// If this code is ever removed (possibly due to a relaxation in the
// SPIR-V rules), also remove the textureShadowMode member variable.
const bool shadowMode = argSampler->getType().getSampler().shadow;
TIntermSymbol* texSymbol = argTex->getAsSymbolNode();
if (texSymbol == nullptr)
texSymbol = argTex->getAsBinaryNode()->getLeft()->getAsSymbolNode();
if (texSymbol != nullptr) {
const auto textureShadowModeEntry = textureShadowMode.find(texSymbol->getId());
// Check to see if this texture has been given a different shadow mode already.
if (textureShadowModeEntry != textureShadowMode.end() &&
textureShadowModeEntry->second != samplerType.shadow) {
error(loc, "all uses of texture must use the same shadow mode", "", "");
return nullptr;
}
argTex->getWritableType().getSampler().shadow = samplerType.shadow;
textureShadowMode[texSymbol->getId()] = samplerType.shadow;
if (texSymbol == nullptr) {
error(loc, "unable to find texture symbol", "", "");
return nullptr;
}
}
// This forces the texture's shadow state to be the sampler's
// shadow state. This depends on downstream optimization to
// DCE one variant in [shadow, nonshadow] if both are present,
// or the SPIR-V module would be invalid.
int newId = texSymbol->getId();
// Check to see if this texture has been given a shadow mode already.
// If so, look up the one we already have.
const auto textureShadowEntry = textureShadowVariant.find(texSymbol->getId());
if (textureShadowEntry != textureShadowVariant.end())
newId = textureShadowEntry->second->get(shadowMode);
else
textureShadowVariant[texSymbol->getId()] = new tShadowTextureSymbols;
// Sometimes we have to create another symbol (if this texture has been seen before,
// and we haven't created the form for this shadow mode).
if (newId == -1) {
TType texType;
texType.shallowCopy(argTex->getType());
texType.getSampler().shadow = shadowMode; // set appropriate shadow mode.
globalQualifierFix(loc, texType.getQualifier());
TVariable* newTexture = makeInternalVariable(texSymbol->getName(), texType);
trackLinkage(*newTexture);
newId = newTexture->getUniqueId();
}
assert(newId != -1);
if (textureShadowVariant.find(newId) == textureShadowVariant.end())
textureShadowVariant[newId] = textureShadowVariant[texSymbol->getId()];
textureShadowVariant[newId]->set(shadowMode, newId);
// Remember this shadow mode in the texture and the merged type.
argTex->getWritableType().getSampler().shadow = shadowMode;
samplerType.shadow = shadowMode;
texSymbol->setId(newId);
}
txcombine->setType(TType(samplerType, EvqTemporary));
txcombine->setLoc(loc);
@ -9506,14 +9535,19 @@ void HlslParseContext::fixTextureShadowModes()
TSampler& sampler = (*symbol)->getWritableType().getSampler();
if (sampler.isTexture()) {
const auto shadowMode = textureShadowMode.find((*symbol)->getUniqueId());
if (shadowMode != textureShadowMode.end())
sampler.shadow = shadowMode->second;
const auto shadowMode = textureShadowVariant.find((*symbol)->getUniqueId());
if (shadowMode != textureShadowVariant.end()) {
if (shadowMode->second->overloaded())
// Texture needs legalization if it's been seen with both shadow and non-shadow modes.
intermediate.setNeedsLegalization();
sampler.shadow = shadowMode->second->isShadowId((*symbol)->getUniqueId());
}
}
}
}
// post-processing
void HlslParseContext::finish()
{
@ -9523,15 +9557,15 @@ void HlslParseContext::finish()
error(mipsOperatorMipArg.back().loc, "unterminated mips operator:", "", "");
}
removeUnusedStructBufferCounters();
addPatchConstantInvocation();
fixTextureShadowModes();
// Communicate out (esp. for command line) that we formed AST that will make
// illegal AST SPIR-V and it needs transforms to legalize it.
if (intermediate.needsLegalization())
infoSink.info << "WARNING: AST will form illegal SPIR-V; need to transform to legalize";
removeUnusedStructBufferCounters();
addPatchConstantInvocation();
fixTextureShadowModes();
TParseContextBase::finish();
}

27
hlsl/hlslParseHelper.h
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@ -457,10 +457,29 @@ protected:
TVector<tMipsOperatorData> mipsOperatorMipArg;
// This can be removed if and when the texture shadow workarounnd in
// HlslParseContext::handleSamplerTextureCombine is removed. It maps
// texture symbol IDs to the shadow modes of samplers they were combined with.
TMap<int, bool> textureShadowMode;
// A texture object may be used with shadow and non-shadow samplers, but both may not be
// alive post-DCE in the same shader. We do not know at compilation time which are alive: that's
// only known post-DCE. If a texture is used both ways, we create two textures, and
// leave the elimiation of one to the optimizer. This maps the shader variant to
// the shadow variant.
//
// This can be removed if and when the texture shadow code in
// HlslParseContext::handleSamplerTextureCombine is removed.
struct tShadowTextureSymbols {
tShadowTextureSymbols() { symId.fill(-1); }
void set(bool shadow, int id) { symId[int(shadow)] = id; }
int get(bool shadow) const { return symId[int(shadow)]; }
// True if this texture has been seen with both shadow and non-shadow modes
bool overloaded() const { return symId[0] != -1 && symId[1] != -1; }
bool isShadowId(int id) const { return symId[1] == id; }
private:
std::array<int, 2> symId;
};
TMap<int, tShadowTextureSymbols*> textureShadowVariant;
};
// This is the prefix we use for built-in methods to avoid namespace collisions with