Create swizzle table inside of glsl caps

src/gpu/glsl/GrGLSLCaps.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "GrGLSLCaps.h"
 
+#include "GrContextOptions.h"
+
 ////////////////////////////////////////////////////////////////////////////////////////////
 
 GrGLSLCaps::GrGLSLCaps(const GrContextOptions& options) {
     fGLSLGeneration = k330_GrGLSLGeneration;
 
     fDropsTileOnZeroDivide = false;
     fFBFetchSupport = false;
     fFBFetchNeedsCustomOutput = false;
     fBindlessTextureSupport = false;
     fUsesPrecisionModifiers = false;
     fCanUseAnyFunctionInShader = true;
     fForceHighPrecisionNDSTransform = false;
     fVersionDeclString = nullptr;
     fShaderDerivativeExtensionString = nullptr;
     fFBFetchColorName = nullptr;
     fFBFetchExtensionString = nullptr;
     fAdvBlendEqInteraction = kNotSupported_AdvBlendEqInteraction;
+
+    fMustSwizzleInShader = false;
+    memset(fConfigSwizzle, 0, sizeof(fConfigSwizzle));
 }
 
 SkString GrGLSLCaps::dump() const {
     SkString r = INHERITED::dump();
 
     static const char* kAdvBlendEqInteractionStr[] = {
         "Not Supported",
         "Automatic",
         "General Enable",
         "Specific Enables",
@@ skipping 11 matching lines @@
     r.appendf("Bindless texture support: %s\n", (fBindlessTextureSupport ? "YES" : "NO"));
     r.appendf("Uses precision modifiers: %s\n", (fUsesPrecisionModifiers ? "YES" : "NO"));
     r.appendf("Can Use any() function: %s\n", (fCanUseAnyFunctionInShader ? "YES" : "NO"));
     r.appendf("Force high precision on NDS transform: %s\n", (fForceHighPrecisionNDSTransform ?
                                                               "YES" : "NO"));
     r.appendf("Advanced blend equation interaction: %s\n",
               kAdvBlendEqInteractionStr[fAdvBlendEqInteraction]);
     return r;
 }
 
+void GrGLSLCaps::onApplyOptionsOverrides(const GrContextOptions& options) {
+    if (options.fUseShaderSwizzling) {
+        fMustSwizzleInShader = true;
+    }
+}
+