commit 6b13129c30e13a40be9b64f6b950d1475d7b4966
author John Stiles <johnstiles@google.com> Wed May 12 17:12:21 2021 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Thu May 13 17:22:43 2021 +0000
tree 17573137125313bd98c43d7350ba489f58a95cd5
parent e3f8030494b417904790b95b689ca25ad945df21

Add support for matrix + scalar to Metal codegen.

The Metal code generator will now detect matrix-op-scalar expressions
and splat the scalar across a matrix. This allows a scalar to be added
to, or subtracted from, a matrix. (It does not fix division because
Metal also does not natively support componentwise division on
matrices.)

Change-Id: I7d5b0c5bd35393475c524e34cad789bf4f72a103
Bug: skia:11125
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/407616
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 45c868b..02794ad 100644
--- a/src/sksl/codegen/SkSLMetalCodeGenerator.h
+++ b/src/sksl/codegen/SkSLMetalCodeGenerator.h
@@ -219,6 +219,9 @@
 
     void writeSwizzle(const Swizzle& swizzle);
 
+    // Splats a scalar expression across a matrix of arbitrary size.
+    void writeNumberAsMatrix(const Expression& expr, const Type& matrixType);
+
     void writeBinaryExpression(const BinaryExpression& b, Precedence parentPrecedence);
 
     void writeTernaryExpression(const TernaryExpression& t, Precedence parentPrecedence);