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SPV: Fix issue #159: use ExplicitLod forms for non-fragment stages.

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This commit is contained in:
John Kessenich 2016-02-15 15:40:42 -07:00
parent 5d0fa9781b
commit 019f08fcd8
5 changed files with 57 additions and 31 deletions
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9
SPIRV/GlslangToSpv.cpp
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@ -2236,6 +2236,7 @@ spv::Id TGlslangToSpvTraverser::createImageTextureFunctionCall(glslang::TIntermO
params.coords = arguments[1];
int extraArgs = 0;
bool noImplicitLod = false;
// sort out where Dref is coming from
if (cubeCompare) {
@ -2257,7 +2258,11 @@ spv::Id TGlslangToSpvTraverser::createImageTextureFunctionCall(glslang::TIntermO
if (cracked.lod) {
params.lod = arguments[2];
++extraArgs;
} else if (sampler.ms) {
} else if (glslangIntermediate->getStage() != EShLangFragment) {
// we need to invent the default lod for an explicit lod instruction for a non-fragment stage
noImplicitLod = true;
}
if (sampler.ms) {
params.sample = arguments[2]; // For MS, "sample" should be specified
++extraArgs;
}
@ -2295,7 +2300,7 @@ spv::Id TGlslangToSpvTraverser::createImageTextureFunctionCall(glslang::TIntermO
}
}
return builder.createTextureCall(precision, convertGlslangToSpvType(node->getType()), sparse, cracked.fetch, cracked.proj, cracked.gather, params);
return builder.createTextureCall(precision, convertGlslangToSpvType(node->getType()), sparse, cracked.fetch, cracked.proj, cracked.gather, noImplicitLod, params);
}
spv::Id TGlslangToSpvTraverser::handleUserFunctionCall(const glslang::TIntermAggregate* node)

22
SPIRV/SpvBuilder.cpp
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@ -1286,7 +1286,7 @@ Id Builder::createBuiltinCall(Id resultType, Id builtins, int entryPoint, std::v
// Accept all parameters needed to create a texture instruction.
// Create the correct instruction based on the inputs, and make the call.
Id Builder::createTextureCall(Decoration precision, Id resultType, bool sparse, bool fetch, bool proj, bool gather, const TextureParameters& parameters)
Id Builder::createTextureCall(Decoration precision, Id resultType, bool sparse, bool fetch, bool proj, bool gather, bool noImplicitLod, const TextureParameters& parameters)
{
static const int maxTextureArgs = 10;
Id texArgs[maxTextureArgs] = {};
@ -1295,7 +1295,7 @@ Id Builder::createTextureCall(Decoration precision, Id resultType, bool sparse,
// Set up the fixed arguments
//
int numArgs = 0;
bool xplicit = false;
bool explicitLod = false;
texArgs[numArgs++] = parameters.sampler;
texArgs[numArgs++] = parameters.coords;
if (parameters.Dref)
@ -1316,13 +1316,18 @@ Id Builder::createTextureCall(Decoration precision, Id resultType, bool sparse,
if (parameters.lod) {
mask = (ImageOperandsMask)(mask | ImageOperandsLodMask);
texArgs[numArgs++] = parameters.lod;
xplicit = true;
}
if (parameters.gradX) {
explicitLod = true;
} else if (parameters.gradX) {
mask = (ImageOperandsMask)(mask | ImageOperandsGradMask);
texArgs[numArgs++] = parameters.gradX;
texArgs[numArgs++] = parameters.gradY;
xplicit = true;
explicitLod = true;
} else if (noImplicitLod && ! fetch && ! gather) {
// have to explicitly use lod of 0 if not allowed to have them be implicit, and
// we would otherwise be about to issue an implicit instruction
mask = (ImageOperandsMask)(mask | ImageOperandsLodMask);
texArgs[numArgs++] = makeFloatConstant(0.0);
explicitLod = true;
}
if (parameters.offset) {
if (isConstant(parameters.offset))
@ -1354,8 +1359,7 @@ Id Builder::createTextureCall(Decoration precision, Id resultType, bool sparse,
//
// Set up the instruction
//
Op opCode;
opCode = OpImageSampleImplicitLod;
Op opCode = OpNop; // All paths below need to set this
if (fetch) {
if (sparse)
opCode = OpImageSparseFetch;
@ -1372,7 +1376,7 @@ Id Builder::createTextureCall(Decoration precision, Id resultType, bool sparse,
opCode = OpImageSparseGather;
else
opCode = OpImageGather;
} else if (xplicit) {
} else if (explicitLod) {
if (parameters.Dref) {
if (proj)
if (sparse)

2
SPIRV/SpvBuilder.h
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@ -323,7 +323,7 @@ public:
};
// Select the correct texture operation based on all inputs, and emit the correct instruction
Id createTextureCall(Decoration precision, Id resultType, bool sparse, bool fetch, bool proj, bool gather, const TextureParameters&);
Id createTextureCall(Decoration precision, Id resultType, bool sparse, bool fetch, bool proj, bool gather, bool noImplicit, const TextureParameters&);
// Emit the OpTextureQuery* instruction that was passed in.
// Figure out the right return value and type, and return it.

42
Test/baseResults/spv.150.vert.out
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@ -5,13 +5,13 @@ Linked vertex stage:
// Module Version 10000
// Generated by (magic number): 80001
// Id's are bound by 50
// Id's are bound by 67
Capability Shader
Capability ClipDistance
1: ExtInstImport "GLSL.std.450"
MemoryModel Logical GLSL450
EntryPoint Vertex 4 "main" 13 17 39 48 49
EntryPoint Vertex 4 "main" 13 17 39 65 66
Source GLSL 150
Name 4 "main"
Name 11 "gl_PerVertex"
@ -30,16 +30,17 @@ Linked vertex stage:
MemberName 37(s2) 1 "d"
Name 39 "s2out"
Name 41 "i"
Name 46 "ui"
Name 48 "gl_VertexID"
Name 49 "gl_InstanceID"
Name 48 "s2D"
Name 63 "ui"
Name 65 "gl_VertexID"
Name 66 "gl_InstanceID"
MemberDecorate 11(gl_PerVertex) 0 Invariant
MemberDecorate 11(gl_PerVertex) 0 BuiltIn Position
MemberDecorate 11(gl_PerVertex) 1 BuiltIn PointSize
MemberDecorate 11(gl_PerVertex) 2 BuiltIn ClipDistance
Decorate 11(gl_PerVertex) Block
Decorate 48(gl_VertexID) BuiltIn VertexId
Decorate 49(gl_InstanceID) BuiltIn InstanceId
Decorate 65(gl_VertexID) BuiltIn VertexId
Decorate 66(gl_InstanceID) BuiltIn InstanceId
2: TypeVoid
3: TypeFunction 2
6: TypeFloat 32
@ -70,11 +71,22 @@ Linked vertex stage:
38: TypePointer Output 37(s2)
39(s2out): 38(ptr) Variable Output
40: TypePointer Function 14(int)
45: TypePointer UniformConstant 14(int)
46(ui): 45(ptr) Variable UniformConstant
47: TypePointer Input 14(int)
48(gl_VertexID): 47(ptr) Variable Input
49(gl_InstanceID): 47(ptr) Variable Input
45: TypeImage 6(float) 2D sampled format:Unknown
46: TypeSampledImage 45
47: TypePointer UniformConstant 46
48(s2D): 47(ptr) Variable UniformConstant
50: TypeVector 6(float) 2
51: 6(float) Constant 1056964608
52: 50(fvec2) ConstantComposite 51 51
53: 6(float) Constant 0
56: TypeVector 6(float) 3
57: 56(fvec3) ConstantComposite 51 51 51
60: 6(float) Constant 1078774989
62: TypePointer UniformConstant 14(int)
63(ui): 62(ptr) Variable UniformConstant
64: TypePointer Input 14(int)
65(gl_VertexID): 64(ptr) Variable Input
66(gl_InstanceID): 64(ptr) Variable Input
4(main): 2 Function None 3
5: Label
41(i): 40(ptr) Variable Function
@ -92,5 +104,11 @@ Linked vertex stage:
43: 6(float) Load 23(ps)
44: 25(ptr) AccessChain 39(s2out) 21 42 27 27 33
Store 44 43
49: 46 Load 48(s2D)
54: 7(fvec4) ImageSampleExplicitLod 49 52 Lod 53
55: 46 Load 48(s2D)
58: 7(fvec4) ImageSampleProjExplicitLod 55 57 Lod 53
59: 46 Load 48(s2D)
61: 7(fvec4) ImageSampleExplicitLod 59 52 Lod 60
Return
FunctionEnd

11
Test/spv.150.vert
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@ -4,6 +4,7 @@ in vec4 iv4;
uniform float ps;
uniform int ui;
uniform sampler2D s2D;
invariant gl_Position;
@ -28,12 +29,10 @@ void main()
int i;
s2out.d[i].b[2].w = ps;
// test recovery from nonsupported built-ins
//float n1 = noise1(2.4);
//n1 = noise1(vec4(n1));
//vec2 n2 = noise2(vec3(n1));
//vec3 n3 = noise3(n2);
//vec4 n4 = noise4(n3);
// test non-implicit lod
texture(s2D, vec2(0.5));
textureProj(s2D, vec3(0.5));
textureLod(s2D, vec2(0.5), 3.2);
}
out float gl_ClipDistance[4];