Move draw on upload decision in GrGpu

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 214 matching lines @@
 }
 
 void GrGpu::clearStencilClip(const SkIRect& rect,
                              bool insideClip,
                              GrRenderTarget* renderTarget) {
     SkASSERT(renderTarget);
     this->handleDirtyContext();
     this->onClearStencilClip(renderTarget, rect, insideClip);
 }
 
+bool GrGpu::getReadPixelsInfo(GrSurface* srcSurface, int width, int height, size_t rowBytes,
+                              GrPixelConfig readConfig, DrawPreference* drawPreference,
+                              ReadPixelTempDrawInfo* tempDrawInfo) {
+    SkASSERT(drawPreference);
+    SkASSERT(tempDrawInfo);
+    SkASSERT(kGpuPrefersDraw_DrawPreference != *drawPreference);
+
+    if (!this->onGetReadPixelsInfo(srcSurface, width, height, rowBytes, readConfig, drawPreference,
+                                   tempDrawInfo)) {
+        return false;
+    }
+
+    // Check to see if we're going to request that the caller draw when drawing is not possible.
+    if (!srcSurface->asTexture() ||
+        !this->caps()->isConfigRenderable(tempDrawInfo->fTempSurfaceDesc.fConfig, false)) {
+        // If we don't have a fallback to a straight read then fail.
+        if (kRequireDraw_DrawPreference == *drawPreference) {
+            return false;
+        }
+        *drawPreference = kNoDraw_DrawPreference;
+    }
+
+    return true;
+}
+bool GrGpu::getWritePixelsInfo(GrSurface* dstSurface, int width, int height, size_t rowBytes,
+                               GrPixelConfig srcConfig, DrawPreference* drawPreference,
+                               WritePixelTempDrawInfo* tempDrawInfo) {
+    SkASSERT(drawPreference);
+    SkASSERT(tempDrawInfo);
+    SkASSERT(kGpuPrefersDraw_DrawPreference != *drawPreference);
+
+    if (this->caps()->useDrawInsteadOfPartialRenderTargetWrite() &&
+        SkToBool(dstSurface->asRenderTarget()) &&
+        (width < dstSurface->width() || height < dstSurface->height())) {
+        ElevateDrawPreference(drawPreference, kRequireDraw_DrawPreference);
+    }
+
+    if (!this->onGetWritePixelsInfo(dstSurface, width, height, rowBytes, srcConfig, drawPreference,
+                                    tempDrawInfo)) {
+        return false;
+    }
+
+    // Check to see if we're going to request that the caller draw when drawing is not possible.
+    if (!dstSurface->asRenderTarget() ||
+        !this->caps()->isConfigTexturable(tempDrawInfo->fTempSurfaceDesc.fConfig)) {
+        // If we don't have a fallback to a straight upload then fail.
+        if (kRequireDraw_DrawPreference == *drawPreference ||
+            !this->caps()->isConfigTexturable(srcConfig)) {
+            return false;
+        }
+        *drawPreference = kNoDraw_DrawPreference;
+    }
+    return true;
+}
+
 bool GrGpu::readPixels(GrRenderTarget* target,
                        int left, int top, int width, int height,
                        GrPixelConfig config, void* buffer,
                        size_t rowBytes) {
     this->handleDirtyContext();
     return this->onReadPixels(target, left, top, width, height,
                               config, buffer, rowBytes);
 }
 
 bool GrGpu::writeTexturePixels(GrTexture* texture,
@@ skipping 59 matching lines @@
 ////////////////////////////////////////////////////////////////////////////////
 
 void GrGpu::draw(const DrawArgs& args, const GrVertices& vertices) {
     this->handleDirtyContext();
     GrVertices::Iterator iter;
     const GrNonInstancedVertices* verts = iter.init(vertices);
     do {
         this->onDraw(args, *verts);
     } while ((verts = iter.next()));
 }