commit e1182785beee0356d742a7c7e5af8fd8ef0bd1c4
author John Stiles <johnstiles@google.com> Tue Mar 30 22:09:37 2021 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Wed Mar 31 18:00:42 2021 +0000
tree 1a0bda50fbe86aa2a0314a3df67ab3fc66a6115f
parent 9f5ad49ec1040b993184dc3306fea974c4b1e23b

Create a diagonal-matrix Constructor class.

This constructor takes a single argument and splats it diagonally across
an otherwise-zero matrix. These are also sometimes referred to as a
uniform-scale matrix.

Change-Id: I1ed8140f55f5cad4029015807b220d6475401daa
Bug: skia:11032
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/390716
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>

src/sksl/SkSLRehydrator.cpp

diff --git a/src/sksl/SkSLRehydrator.cpp b/src/sksl/SkSLRehydrator.cpp
index e289792..a8cc648 100644
--- a/src/sksl/SkSLRehydrator.cpp
+++ b/src/sksl/SkSLRehydrator.cpp
@@ -15,6 +15,8 @@
 #include "include/private/SkSLStatement.h"
 #include "src/sksl/ir/SkSLBinaryExpression.h"
 #include "src/sksl/ir/SkSLBreakStatement.h"
+#include "src/sksl/ir/SkSLConstructor.h"
+#include "src/sksl/ir/SkSLConstructorDiagonalMatrix.h"
 #include "src/sksl/ir/SkSLContinueStatement.h"
 #include "src/sksl/ir/SkSLDiscardStatement.h"
 #include "src/sksl/ir/SkSLDoStatement.h"
@@ -451,6 +453,11 @@
             SkASSERT(ctor);
             return ctor;
         }
+        case Rehydrator::kConstructorDiagonalMatrix_Command: {
+            const Type* type = this->type();
+            return ConstructorDiagonalMatrix::Make(fContext, /*offset=*/-1, *type,
+                                                   this->expression());
+        }
         case Rehydrator::kFieldAccess_Command: {
             std::unique_ptr<Expression> base = this->expression();
             int index = this->readU8();