commit 6de2e1db031134a85a98e405658ded37d7e1aa70
author John Stiles <johnstiles@google.com> Fri Jul 09 12:41:55 2021 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Fri Jul 09 17:55:22 2021 +0000
tree 7b65b52a0d7a892f8692bdc1ce3777adb05d2674
parent 13d34497db8e119aadaca9c907bd4a4132252810

Add support for matrix-to-vector conversions in SkSL.

GLSL supports casting vec4 into mat2 and vice versa, so SkSL should have
equivalent support. This CL allows the Compound constructor to take a
matrix as input, and fixes up backends to do the right thing when a
matrix shows up in the compound-constructor path.

Change-Id: I13289ad0a27ba59bddc3706093820594efebc693
Bug: skia:12067
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/426003
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>

src/sksl/codegen/SkSLMetalCodeGenerator.h

diff --git a/src/sksl/codegen/SkSLMetalCodeGenerator.h b/src/sksl/codegen/SkSLMetalCodeGenerator.h
index b5695be..b0a75a2 100644
--- a/src/sksl/codegen/SkSLMetalCodeGenerator.h
+++ b/src/sksl/codegen/SkSLMetalCodeGenerator.h
@@ -180,6 +180,8 @@
 
     void writeMatrixEqualityHelpers(const Type& left, const Type& right);
 
+    void writeVectorFromMat2x2ConstructorHelper();
+
     void writeArrayEqualityHelpers(const Type& type);
 
     void writeStructEqualityHelpers(const Type& type);
@@ -196,6 +198,8 @@
 
     void writeConstructorCompound(const ConstructorCompound& c, Precedence parentPrecedence);
 
+    void writeConstructorCompoundVector(const ConstructorCompound& c, Precedence parentPrecedence);
+
     void writeConstructorCompoundMatrix(const ConstructorCompound& c, Precedence parentPrecedence);
 
     void writeConstructorMatrixResize(const ConstructorMatrixResize& c,