Implement texel buffers

src/gpu/GrProcessor.cpp

Index: src/gpu/GrProcessor.cpp
diff --git a/src/gpu/GrProcessor.cpp b/src/gpu/GrProcessor.cpp
index fdfbbb571358101462019474a83f9f738f4a05d7..0d3f8d916684d8c3766795ebd8e313d3020cd044 100644
--- a/src/gpu/GrProcessor.cpp
+++ b/src/gpu/GrProcessor.cpp
@@ -106,6 +106,11 @@ void GrProcessor::addTextureAccess(const GrTextureAccess* 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);
 }
@@ -114,8 +119,8 @@ 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) {
@@ -123,6 +128,11 @@ bool GrProcessor::hasSameTextureAccesses(const GrProcessor& that) const {
             return false;
         }
     }
+    for (int i = 0; i < this->numBuffers(); ++i) {
+        if (this->bufferAccess(i) != that.bufferAccess(i)) {
+            return false;
+        }
+    }
     return true;
 }