1 files changed, 56 insertions, 0 deletions
diff --git a/gfx/skia/skia/src/sksl/ir/SkSLConstructorMatrixResize.h b/gfx/skia/skia/src/sksl/ir/SkSLConstructorMatrixResize.h
new file mode 100644
index 0000000000..bf1d3f5897
--- /dev/null
+++ b/gfx/skia/skia/src/sksl/ir/SkSLConstructorMatrixResize.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2021 Google LLC
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SKSL_CONSTRUCTOR_MATRIX_RESIZE
+#define SKSL_CONSTRUCTOR_MATRIX_RESIZE
+
+#include "include/private/SkSLIRNode.h"
+#include "include/sksl/SkSLPosition.h"
+#include "src/sksl/ir/SkSLConstructor.h"
+#include "src/sksl/ir/SkSLExpression.h"
+
+#include <memory>
+#include <optional>
+#include <utility>
+
+namespace SkSL {
+
+class Context;
+class Type;
+
+/**
+ * Represents the construction of a matrix resize operation, such as `mat4x4(myMat2x2)`.
+ *
+ * These always contain exactly 1 matrix of non-matching size. Cells that aren't present in the
+ * input matrix are populated with the identity matrix.
+ */
+class ConstructorMatrixResize final : public SingleArgumentConstructor {
+public:
+    inline static constexpr Kind kIRNodeKind = Kind::kConstructorMatrixResize;
+
+    ConstructorMatrixResize(Position pos, const Type& type, std::unique_ptr<Expression> arg)
+            : INHERITED(pos, kIRNodeKind, &type, std::move(arg)) {}
+
+    static std::unique_ptr<Expression> Make(const Context& context,
+                                            Position pos,
+                                            const Type& type,
+                                            std::unique_ptr<Expression> arg);
+
+    std::unique_ptr<Expression> clone(Position pos) const override {
+        return std::make_unique<ConstructorMatrixResize>(pos, this->type(), argument()->clone());
+    }
+
+    bool supportsConstantValues() const override { return true; }
+    std::optional<double> getConstantValue(int n) const override;
+
+private:
+    using INHERITED = SingleArgumentConstructor;
+};
+
+}  // namespace SkSL
+
+#endif