Modify GLSL version declaration to allow access to compat. features

src/gpu/gl/GrGLSL.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrGLSL.h"
 #include "GrGLShaderVar.h"
 #include "SkString.h"
@@ skipping 15 matching lines @@
         case kES_GrGLBinding:
             // version 1.00 of ES GLSL based on ver 1.20 of desktop GLSL
             SkASSERT(ver >= GR_GL_VER(1,00));
             return k110_GrGLSLGeneration;
         default:
             GrCrash("Unknown GL Binding");
             return k110_GrGLSLGeneration; // suppress warning
     }
 }
 
-const char* GrGetGLSLVersionDecl(GrGLBinding binding, GrGLSLGeneration gen) {
-    switch (gen) {
+const char* GrGetGLSLVersionDecl(const GrGLContextInfo& info) {
+    switch (info.glslGeneration()) {
         case k110_GrGLSLGeneration:
-            if (kES_GrGLBinding == binding) {
+            if (kES_GrGLBinding == info.binding()) {
                 // ES2s shader language is based on version 1.20 but is version
                 // 1.00 of the ES language.
                 return "#version 100\n";
             } else {
-                SkASSERT(kDesktop_GrGLBinding == binding);
+                SkASSERT(kDesktop_GrGLBinding == info.binding());
                 return "#version 110\n";
             }
         case k130_GrGLSLGeneration:
-            SkASSERT(kDesktop_GrGLBinding == binding);
+            SkASSERT(kDesktop_GrGLBinding == info.binding());
             return "#version 130\n";
         case k140_GrGLSLGeneration:
-            SkASSERT(kDesktop_GrGLBinding == binding);
+            SkASSERT(kDesktop_GrGLBinding == info.binding());
             return "#version 140\n";
         case k150_GrGLSLGeneration:
-            SkASSERT(kDesktop_GrGLBinding == binding);
-            return "#version 150\n";
+            SkASSERT(kDesktop_GrGLBinding == info.binding());
+            if (info.caps()->isCoreProfile()) {
+                return "#version 150\n";
+            } else {
+                return "#version 150 compatibility\n";
+            }
         default:
             GrCrash("Unknown GL version.");
             return ""; // suppress warning
     }
 }
 
 bool GrGLSLSetupFSColorOuput(GrGLSLGeneration gen, const char* nameIfDeclared, GrGLShaderVar* var) {
     bool declaredOutput = k110_GrGLSLGeneration != gen;
     var->set(kVec4f_GrSLType,
              GrGLShaderVar::kOut_TypeModifier,
@@ skipping 72 matching lines @@
                 SkASSERT(kZeros_GrSLConstantVec == defaultExpr);
                 outAppend->append("0.0");
             }
         }
         return defaultExpr;
     } else {
         outAppend->appendf("(%s).%c", expr, GrColorComponentFlagToChar(component));
         return kNone_GrSLConstantVec;
     }
 }