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added SPIR-V RelaxedPrecision

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Bug: skia:5524
Change-Id: I716b6bb8da95acb72ba71d083eb8b40cafbc6af8
Reviewed-on: https://skia-review.googlesource.com/19266
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
This commit is contained in:
Ethan Nicholas 2017-06-09 10:47:31 -04:00 committed by Skia Commit-Bot
parent b310fd597f
commit a51d7137ec
2 changed files with 10 additions and 0 deletions
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8
src/sksl/SkSLSPIRVCodeGenerator.cpp
View File

@ -2599,6 +2599,13 @@ SpvId SPIRVCodeGenerator::writeInterfaceBlock(const InterfaceBlock& intf) {
return result;
}
void SPIRVCodeGenerator::writePrecisionModifier(const Modifiers& modifiers, SpvId id) {
if ((modifiers.fFlags & Modifiers::kLowp_Flag) |
(modifiers.fFlags & Modifiers::kMediump_Flag)) {
this->writeInstruction(SpvOpDecorate, id, SpvDecorationRelaxedPrecision, fDecorationBuffer);
}
}
#define BUILTIN_IGNORE 9999
void SPIRVCodeGenerator::writeGlobalVars(Program::Kind kind, const VarDeclarations& decl,
OutputStream& out) {
@ -2650,6 +2657,7 @@ void SPIRVCodeGenerator::writeGlobalVars(Program::Kind kind, const VarDeclaratio
SpvId type = this->getPointerType(var->fType, storageClass);
this->writeInstruction(SpvOpVariable, type, id, storageClass, fConstantBuffer);
this->writeInstruction(SpvOpName, id, var->fName.c_str(), fNameBuffer);
this->writePrecisionModifier(var->fModifiers, id);
if (var->fType.kind() == Type::kMatrix_Kind) {
this->writeInstruction(SpvOpMemberDecorate, id, (SpvId) i, SpvDecorationColMajor,
fDecorationBuffer);

2
src/sksl/SkSLSPIRVCodeGenerator.h
View File

@ -111,6 +111,8 @@ private:
SpvId getPointerType(const Type& type, const MemoryLayout& layout,
SpvStorageClass_ storageClass);
void writePrecisionModifier(const Modifiers& modifiers, SpvId id);
std::vector<SpvId> getAccessChain(const Expression& expr, OutputStream& out);
void writeLayout(const Layout& layout, SpvId target);