Roll back to ANGLE/2845

1 files changed, 34 insertions, 12 deletions

diff --git a/gfx/angle/src/compiler/translator/ScalarizeVecAndMatConstructorArgs.h b/gfx/angle/src/compiler/translator/ScalarizeVecAndMatConstructorArgs.h
index 14bbbe13e..d7553be23 100755
--- a/gfx/angle/src/compiler/translator/ScalarizeVecAndMatConstructorArgs.h
+++ b/gfx/angle/src/compiler/translator/ScalarizeVecAndMatConstructorArgs.h
@@ -3,24 +3,46 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
-// Scalarize vector and matrix constructor args, so that vectors built from components don't have
-// matrix arguments, and matrices built from components don't have vector arguments. This avoids
-// driver bugs around vector and matrix constructors.
-//
 
 #ifndef COMPILER_TRANSLATOR_SCALARIZEVECANDMATCONSTRUCTORARGS_H_
 #define COMPILER_TRANSLATOR_SCALARIZEVECANDMATCONSTRUCTORARGS_H_
 
-#include "GLSLANG/ShaderLang.h"
+#include "compiler/translator/IntermNode.h"
 
-namespace sh
+class ScalarizeVecAndMatConstructorArgs : public TIntermTraverser
 {
-class TIntermBlock;
+  public:
+    ScalarizeVecAndMatConstructorArgs(sh::GLenum shaderType,
+                                      bool fragmentPrecisionHigh)
+        : TIntermTraverser(true, false, false),
+          mTempVarCount(0),
+          mShaderType(shaderType),
+          mFragmentPrecisionHigh(fragmentPrecisionHigh) {}
+
+  protected:
+    bool visitAggregate(Visit visit, TIntermAggregate *node) override;
+
+  private:
+    void scalarizeArgs(TIntermAggregate *aggregate,
+                       bool scalarizeVector, bool scalarizeMatrix);
+
+    // If we have the following code:
+    //   mat4 m(0);
+    //   vec4 v(1, m);
+    // We will rewrite to:
+    //   mat4 m(0);
+    //   mat4 _webgl_tmp_mat_0 = m;
+    //   vec4 v(1, _webgl_tmp_mat_0[0][0], _webgl_tmp_mat_0[0][1], _webgl_tmp_mat_0[0][2]);
+    // This function is to create nodes for "mat4 _webgl_tmp_mat_0 = m;" and insert it to
+    // the code sequence.
+    // Return the temporary variable name.
+    TString createTempVariable(TIntermTyped *original);
+
+    std::vector<TIntermSequence> mSequenceStack;
+    int mTempVarCount;
 
-void ScalarizeVecAndMatConstructorArgs(TIntermBlock *root,
-                                       sh::GLenum shaderType,
-                                       bool fragmentPrecisionHigh,
-                                       unsigned int *temporaryIndex);
-}  // namespace sh
+    sh::GLenum mShaderType;
+    bool mFragmentPrecisionHigh;
+};
 
 #endif  // COMPILER_TRANSLATOR_SCALARIZEVECANDMATCONSTRUCTORARGS_H_