Implement texel buffers

src/gpu/GrProcessor.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 "GrProcessor.h"
 #include "GrContext.h"
 #include "GrGeometryProcessor.h"
@@ skipping 88 matching lines @@
 
 ///////////////////////////////////////////////////////////////////////////////
 
 GrProcessor::~GrProcessor() {}
 
 void GrProcessor::addTextureAccess(const GrTextureAccess* access) {
     fTextureAccesses.push_back(access);
     this->addGpuResource(access->getProgramTexture());
 }
 
+void GrProcessor::addBufferAccess(const GrBufferAccess* access) {

[Chris Dalton, 2016/04/08 00:56:43]

Is there a kosher way to get a hold of a caps object here to assert texel buffer
support? If not, the program builder will do it later.

[bsalomon, 2016/04/11 16:51:38]

Not really. I wouldn't bend over backwards for that assert.

+    fBufferAccesses.push_back(access);
+    this->addGpuResource(access->getProgramBuffer());
+}
+
 void* GrProcessor::operator new(size_t size) {
     return MemoryPoolAccessor().pool()->allocate(size);
 }
 
 void GrProcessor::operator delete(void* target) {
     return MemoryPoolAccessor().pool()->release(target);
 }
 
-bool GrProcessor::hasSameTextureAccesses(const GrProcessor& that) const {
-    if (this->numTextures() != that.numTextures()) {
+bool GrProcessor::hasSameSamplers(const GrProcessor& that) const {
+    if (this->numTextures() != that.numTextures() || this->numBuffers() != that.numBuffers()) {
         return false;
     }
     for (int i = 0; i < this->numTextures(); ++i) {
         if (this->textureAccess(i) != that.textureAccess(i)) {
             return false;
         }
     }
+    for (int i = 0; i < this->numBuffers(); ++i) {
+        if (this->bufferAccess(i) != that.bufferAccess(i)) {
+            return false;
+        }
+    }
     return true;
 }
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 // Initial static variable from GrXPFactory
 int32_t GrXPFactory::gCurrXPFClassID =
         GrXPFactory::kIllegalXPFClassID;