Implement GL support for buffer textures

include/gpu/GrTypesPriv.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrTypesPriv_DEFINED
 #define GrTypesPriv_DEFINED
 
 #include "GrTypes.h"
 #include "SkRect.h"
 
  /**
   * Types of shader-language-specific boxed variables we can create. (Currently only GrGLShaderVars,
   * but should be applicable to other shader languages.)
   */
 enum GrSLType {
     kVoid_GrSLType,
     kFloat_GrSLType,
     kVec2f_GrSLType,
     kVec3f_GrSLType,
     kVec4f_GrSLType,
     kMat22f_GrSLType,
     kMat33f_GrSLType,
     kMat44f_GrSLType,
     kSampler2D_GrSLType,
     kSamplerExternal_GrSLType,
     kSampler2DRect_GrSLType,
+    kSamplerBuffer_GrSLType,
     kBool_GrSLType,
     kInt_GrSLType,
     kUint_GrSLType,
 
     kLast_GrSLType = kUint_GrSLType
 };
 static const int kGrSLTypeCount = kLast_GrSLType + 1;
 
 enum GrShaderType {
     kVertex_GrShaderType,
@@ skipping 29 matching lines @@
     kLast_GrSLPrecision = kHigh_GrSLPrecision
 };
 
 static const int kGrSLPrecisionCount = kLast_GrSLPrecision + 1;
 
 /**
  * Gets the vector size of the SLType. Returns -1 for void, matrices, and samplers.
  */
 static inline int GrSLTypeVectorCount(GrSLType type) {
     SkASSERT(type >= 0 && type < static_cast<GrSLType>(kGrSLTypeCount));
-    static const int kCounts[] = { -1, 1, 2, 3, 4, -1, -1, -1, -1, -1, -1, 1, 1, 1 };
+    static const int kCounts[] = { -1, 1, 2, 3, 4, -1, -1, -1, -1, -1, -1, -1, 1, 1, 1 };
     return kCounts[type];
 
     GR_STATIC_ASSERT(0 == kVoid_GrSLType);
     GR_STATIC_ASSERT(1 == kFloat_GrSLType);
     GR_STATIC_ASSERT(2 == kVec2f_GrSLType);
     GR_STATIC_ASSERT(3 == kVec3f_GrSLType);
     GR_STATIC_ASSERT(4 == kVec4f_GrSLType);
     GR_STATIC_ASSERT(5 == kMat22f_GrSLType);
     GR_STATIC_ASSERT(6 == kMat33f_GrSLType);
     GR_STATIC_ASSERT(7 == kMat44f_GrSLType);
     GR_STATIC_ASSERT(8 == kSampler2D_GrSLType);
     GR_STATIC_ASSERT(9 == kSamplerExternal_GrSLType);
     GR_STATIC_ASSERT(10 == kSampler2DRect_GrSLType);
-    GR_STATIC_ASSERT(11 == kBool_GrSLType);
-    GR_STATIC_ASSERT(12 == kInt_GrSLType);
-    GR_STATIC_ASSERT(13 == kUint_GrSLType);
+    GR_STATIC_ASSERT(11 == kSamplerBuffer_GrSLType);
+    GR_STATIC_ASSERT(12 == kBool_GrSLType);
+    GR_STATIC_ASSERT(13 == kInt_GrSLType);
+    GR_STATIC_ASSERT(14 == kUint_GrSLType);
     GR_STATIC_ASSERT(SK_ARRAY_COUNT(kCounts) == kGrSLTypeCount);
 }
 
 /** Return the type enum for a vector of floats of length n (1..4),
  e.g. 1 -> kFloat_GrSLType, 2 -> kVec2_GrSLType, ... */
 static inline GrSLType GrSLFloatVectorType(int count) {
     SkASSERT(count > 0 && count <= 4);
     return (GrSLType)(count);
 
     GR_STATIC_ASSERT(kFloat_GrSLType == 1);
@@ skipping 11 matching lines @@
     GR_STATIC_ASSERT(1 == kFloat_GrSLType);
     GR_STATIC_ASSERT(2 == kVec2f_GrSLType);
     GR_STATIC_ASSERT(3 == kVec3f_GrSLType);
     GR_STATIC_ASSERT(4 == kVec4f_GrSLType);
     GR_STATIC_ASSERT(5 == kMat22f_GrSLType);
     GR_STATIC_ASSERT(6 == kMat33f_GrSLType);
     GR_STATIC_ASSERT(7 == kMat44f_GrSLType);
     GR_STATIC_ASSERT(8 == kSampler2D_GrSLType);
     GR_STATIC_ASSERT(9 == kSamplerExternal_GrSLType);
     GR_STATIC_ASSERT(10 == kSampler2DRect_GrSLType);
-    GR_STATIC_ASSERT(11 == kBool_GrSLType);
-    GR_STATIC_ASSERT(12 == kInt_GrSLType);
-    GR_STATIC_ASSERT(13 == kUint_GrSLType);
-    GR_STATIC_ASSERT(14 == kGrSLTypeCount);
+    GR_STATIC_ASSERT(11 == kSamplerBuffer_GrSLType);
+    GR_STATIC_ASSERT(12 == kBool_GrSLType);
+    GR_STATIC_ASSERT(13 == kInt_GrSLType);
+    GR_STATIC_ASSERT(14 == kUint_GrSLType);
+    GR_STATIC_ASSERT(15 == kGrSLTypeCount);
 }
 
 /** Is the shading language type integral (including vectors/matrices)? */
 static inline bool GrSLTypeIsIntType(GrSLType type) {
     SkASSERT(type >= 0 && type < static_cast<GrSLType>(kGrSLTypeCount));
     return type >= kInt_GrSLType;
 
     GR_STATIC_ASSERT(0 == kVoid_GrSLType);
     GR_STATIC_ASSERT(1 == kFloat_GrSLType);
     GR_STATIC_ASSERT(2 == kVec2f_GrSLType);
     GR_STATIC_ASSERT(3 == kVec3f_GrSLType);
     GR_STATIC_ASSERT(4 == kVec4f_GrSLType);
     GR_STATIC_ASSERT(5 == kMat22f_GrSLType);
     GR_STATIC_ASSERT(6 == kMat33f_GrSLType);
     GR_STATIC_ASSERT(7 == kMat44f_GrSLType);
     GR_STATIC_ASSERT(8 == kSampler2D_GrSLType);
     GR_STATIC_ASSERT(9 == kSamplerExternal_GrSLType);
     GR_STATIC_ASSERT(10 == kSampler2DRect_GrSLType);
-    GR_STATIC_ASSERT(11 == kBool_GrSLType);
-    GR_STATIC_ASSERT(12 == kInt_GrSLType);
-    GR_STATIC_ASSERT(13 == kUint_GrSLType);
-    GR_STATIC_ASSERT(14 == kGrSLTypeCount);
+    GR_STATIC_ASSERT(11 == kSamplerBuffer_GrSLType);
+    GR_STATIC_ASSERT(12 == kBool_GrSLType);
+    GR_STATIC_ASSERT(13 == kInt_GrSLType);
+    GR_STATIC_ASSERT(14 == kUint_GrSLType);
+    GR_STATIC_ASSERT(15 == kGrSLTypeCount);
 }
 
 /** Is the shading language type numeric (including vectors/matrices)? */
 static inline bool GrSLTypeIsNumeric(GrSLType type) {
     return GrSLTypeIsFloatType(type) || GrSLTypeIsIntType(type);
 }
 
 /** Returns the size in bytes for floating point GrSLTypes. For non floating point type returns 0 */
 static inline size_t GrSLTypeSize(GrSLType type) {
     SkASSERT(GrSLTypeIsFloatType(type));
     static const size_t kSizes[] = {
         0,                        // kVoid_GrSLType
         sizeof(float),            // kFloat_GrSLType
         2 * sizeof(float),        // kVec2f_GrSLType
         3 * sizeof(float),        // kVec3f_GrSLType
         4 * sizeof(float),        // kVec4f_GrSLType
         2 * 2 * sizeof(float),    // kMat22f_GrSLType
         3 * 3 * sizeof(float),    // kMat33f_GrSLType
         4 * 4 * sizeof(float),    // kMat44f_GrSLType
         0,                        // kSampler2D_GrSLType
         0,                        // kSamplerExternal_GrSLType
         0,                        // kSampler2DRect_GrSLType
+        0,                        // kSamplerBuffer_GrSLType
         0,                        // kBool_GrSLType
         0,                        // kInt_GrSLType
         0,                        // kUint_GrSLType
     };
     return kSizes[type];
 
     GR_STATIC_ASSERT(0 == kVoid_GrSLType);
     GR_STATIC_ASSERT(1 == kFloat_GrSLType);
     GR_STATIC_ASSERT(2 == kVec2f_GrSLType);
     GR_STATIC_ASSERT(3 == kVec3f_GrSLType);
     GR_STATIC_ASSERT(4 == kVec4f_GrSLType);
     GR_STATIC_ASSERT(5 == kMat22f_GrSLType);
     GR_STATIC_ASSERT(6 == kMat33f_GrSLType);
     GR_STATIC_ASSERT(7 == kMat44f_GrSLType);
     GR_STATIC_ASSERT(8 == kSampler2D_GrSLType);
     GR_STATIC_ASSERT(9 == kSamplerExternal_GrSLType);
     GR_STATIC_ASSERT(10 == kSampler2DRect_GrSLType);
-    GR_STATIC_ASSERT(11 == kBool_GrSLType);
-    GR_STATIC_ASSERT(12 == kInt_GrSLType);
-    GR_STATIC_ASSERT(13 == kUint_GrSLType);
-    GR_STATIC_ASSERT(14 == kGrSLTypeCount);
+    GR_STATIC_ASSERT(11 == kSamplerBuffer_GrSLType);
+    GR_STATIC_ASSERT(12 == kBool_GrSLType);
+    GR_STATIC_ASSERT(13 == kInt_GrSLType);
+    GR_STATIC_ASSERT(14 == kUint_GrSLType);
+    GR_STATIC_ASSERT(15 == kGrSLTypeCount);
 }
 
 static inline bool GrSLTypeIsSamplerType(GrSLType type) {
     SkASSERT(type >= 0 && type < static_cast<GrSLType>(kGrSLTypeCount));
-    return type >= kSampler2D_GrSLType && type <= kSampler2DRect_GrSLType;
+    return type >= kSampler2D_GrSLType && type <= kSamplerBuffer_GrSLType;
 
     GR_STATIC_ASSERT(8 == kSampler2D_GrSLType);
     GR_STATIC_ASSERT(9 == kSamplerExternal_GrSLType);
     GR_STATIC_ASSERT(10 == kSampler2DRect_GrSLType);
+    GR_STATIC_ASSERT(11 == kSamplerBuffer_GrSLType);
 }
 
 static inline bool GrSLTypeAcceptsPrecision(GrSLType type) {
     return GrSLTypeIsNumeric(type) || GrSLTypeIsSamplerType(type);
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
 /**
  * Types used to describe format of vertices in arrays.
@@ skipping 200 matching lines @@
 // Takes a pointer to a GrCaps, and will suppress prints if required
 #define GrCapsDebugf(caps, ...)         \
     if (!caps->suppressPrints()) {      \
         SkDebugf(__VA_ARGS__);          \
     }
 #else
 #define GrCapsDebugf(caps, ...)
 #endif
 
 #endif