Revert "Revert of Move copy-surface-as-draw fallback to GrGLGpu. (patchset #12 id:220001 of https:/…

src/gpu/gl/GrGLSL.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLSL_DEFINED
 #define GrGLSL_DEFINED
 
@@ skipping 39 matching lines @@
  */
 bool GrGetGLSLGeneration(const GrGLInterface* gl, GrGLSLGeneration* generation);
 
 /**
  * Returns a string to include at the beginning of a shader to declare the GLSL
  * version.
  */
 const char* GrGetGLSLVersionDecl(const GrGLContextInfo&);
 
 /**
+ * Adds a line of GLSL code to declare the default precision for float types.
+ */
+void GrGLSLAppendDefaultFloatPrecisionDeclaration(GrSLPrecision, GrGLStandard, SkString* out);
+
+/**
+ * Gets the name of the function that should be used to sample a 2D texture. Coord type is used
+ * to indicate whether the texture is sampled using projective textured (kVec3f) or not (kVec2f).
+ */
+inline const char* GrGLSLTexture2DFunctionName(GrSLType coordType, GrGLSLGeneration glslGen) {
+    if (kVec2f_GrSLType == coordType) {
+        return glslGen >= k130_GrGLSLGeneration ? "texture" : "texture2D";
+    } else {
+        SkASSERT(kVec3f_GrSLType == coordType);
+        return glslGen >= k130_GrGLSLGeneration ? "textureProj" : "texture2DProj";
+    }
+}
+
+/**
  * Converts a GrSLType to a string containing the name of the equivalent GLSL type.
  */
 static inline const char* GrGLSLTypeString(GrSLType t) {
     switch (t) {
         case kVoid_GrSLType:
             return "void";
         case kFloat_GrSLType:
             return "float";
         case kVec2f_GrSLType:
             return "vec2";
@@ skipping 248 matching lines @@
 
 /**
  * Does an inplace mul, *=, of vec4VarName by mulFactor.
  * A semicolon is added after the assignment.
  */
 void GrGLSLMulVarBy4f(SkString* outAppend, const char* vec4VarName, const GrGLSLExpr4& mulFactor);
 
 #include "GrGLSL_impl.h"
 
 #endif