sksl now provides support for inverse, transpose, et al. on older versions of OpenGL

Bug: skia:
Change-Id: I7dec3e3ae9f111a61c294cba4547c1af2260722f
Reviewed-on: https://skia-review.googlesource.com/90525
Reviewed-by: Chris Dalton <csmartdalton@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/src/sksl/SkSLGLSLCodeGenerator.h b/src/sksl/SkSLGLSLCodeGenerator.h
index e9a63ac48f..70ce920900 100644
--- a/src/sksl/SkSLGLSLCodeGenerator.h
+++ b/src/sksl/SkSLGLSLCodeGenerator.h
@@ -136,6 +136,14 @@ protected:
 
     void writeMinAbsHack(Expression& absExpr, Expression& otherExpr);
 
+    void writeDeterminantHack(const Expression& mat);
+
+    void writeInverseHack(const Expression& mat);
+
+    void writeTransposeHack(const Expression& mat);
+
+    void writeInverseSqrtHack(const Expression& x);
+
     virtual void writeFunctionCall(const FunctionCall& c);
 
     void writeConstructor(const Constructor& c, Precedence parentPrecedence);
@@ -187,6 +195,7 @@ protected:
     const char* fLineEnding;
     const Context& fContext;
     StringStream fHeader;
+    StringStream fExtraFunctions;
     String fFunctionHeader;
     Program::Kind fProgramKind;
     int fVarCount = 0;
@@ -196,6 +205,7 @@ protected:
     // more than one or two structs per shader, a simple linear search will be faster than anything
     // fancier.
     std::vector<const Type*> fWrittenStructs;
+    std::set<String> fWrittenIntrinsics;
     // true if we have run into usages of dFdx / dFdy
     bool fFoundDerivatives = false;
     bool fFoundImageDecl = false;