More framework support for TransferBuffers

src/gpu/GrGpu.cpp

 
 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "GrGpu.h"
@@ skipping 316 matching lines @@
     return this->onReadPixels(surface,
                               left, top, width, height,
                               config, buffer,
                               rowBytes);
 }
 
 bool GrGpu::writePixels(GrSurface* surface,
                         int left, int top, int width, int height,
                         GrPixelConfig config, const void* buffer,
                         size_t rowBytes) {
-    if (!buffer) {
+    if (!buffer || !surface) {
         return false;
     }
 
     this->handleDirtyContext();
     if (this->onWritePixels(surface, left, top, width, height, config, buffer, rowBytes)) {
         fStats.incTextureUploads();
         return true;
     }
     return false;
 }
 
+bool GrGpu::transferPixels(GrSurface* surface,
+                           int left, int top, int width, int height,
+                           GrPixelConfig config, GrTransferBuffer* buffer,
+                           size_t offset, size_t rowBytes) {
+    if (!buffer) {

[bsalomon, 2016/01/05 14:01:17]

wondering whether this should be an assert since GrTB is a internal type

[jvanverth1, 2016/01/05 17:21:28]

Done.

+        return false;
+    }
+
+    this->handleDirtyContext();
+    if (this->onTransferPixels(surface, left, top, width, height, config, 
+                               buffer, offset, rowBytes)) {
+        fStats.incTransfersToTexture();
+        return true;
+    }
+    return false;
+}
+
 void GrGpu::resolveRenderTarget(GrRenderTarget* target) {
     SkASSERT(target);
     this->handleDirtyContext();
     this->onResolveRenderTarget(target);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 
 void GrGpu::draw(const DrawArgs& args, const GrVertices& vertices) {
     this->handleDirtyContext();
     if (GrXferBarrierType barrierType = args.fPipeline->xferBarrierType(*this->caps())) {
         this->xferBarrier(args.fPipeline->getRenderTarget(), barrierType);
     }
 
     GrVertices::Iterator iter;
     const GrNonInstancedVertices* verts = iter.init(vertices);
     do {
         this->onDraw(args, *verts);
         fStats.incNumDraws();
     } while ((verts = iter.next()));
 }