Add tiled rendering as an option to GM.
Use an SkGPipe to play back drawing into tiles.
This will help us to debug differences in drawing
while tiled.
Pass --tiledPipe to gm to use the tiled pipe.
Review URL: https://codereview.appspot.com/6295050
git-svn-id: http://skia.googlecode.com/svn/trunk@4199 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/pipe/utils/SamplePipeControllers.cpp b/src/pipe/utils/SamplePipeControllers.cpp
new file mode 100644
index 0000000..487a2b8
--- /dev/null
+++ b/src/pipe/utils/SamplePipeControllers.cpp
@@ -0,0 +1,72 @@
+/*
+ * 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 "SamplePipeControllers.h"
+#include "SkCanvas.h"
+#include "SkDevice.h"
+#include "SkGPipe.h"
+
+PipeController::PipeController(SkCanvas* target)
+:fReader(target) {
+ fBlock = NULL;
+ fBlockSize = fBytesWritten = 0;
+}
+
+PipeController::~PipeController() {
+ sk_free(fBlock);
+}
+
+void* PipeController::requestBlock(size_t minRequest, size_t *actual) {
+ sk_free(fBlock);
+ fBlockSize = minRequest * 4;
+ fBlock = sk_malloc_throw(fBlockSize);
+ fBytesWritten = 0;
+ *actual = fBlockSize;
+ return fBlock;
+}
+
+void PipeController::notifyWritten(size_t bytes) {
+ fStatus = fReader.playback(this->getData(), bytes);
+ SkASSERT(SkGPipeReader::kError_Status != fStatus);
+ fBytesWritten += bytes;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+TiledPipeController::TiledPipeController(const SkBitmap& bitmap)
+: INHERITED(NULL) {
+ int32_t top = 0;
+ int32_t bottom;
+ int32_t height = bitmap.height() / NumberOfTiles;
+ SkIRect rect;
+ for (int i = 0; i < NumberOfTiles; i++) {
+ bottom = i + 1 == NumberOfTiles ? bitmap.height() : top + height;
+ rect.setLTRB(0, top, bitmap.width(), bottom);
+ top = bottom;
+
+ bool extracted = bitmap.extractSubset(&fBitmaps[i], rect);
+ SkASSERT(extracted);
+ SkDevice* device = new SkDevice(fBitmaps[i]);
+ SkCanvas* canvas = new SkCanvas(device);
+ device->unref();
+ canvas->translate(SkIntToScalar(-rect.left()),
+ SkIntToScalar(-rect.top()));
+ if (0 == i) {
+ fReader.setCanvas(canvas);
+ } else {
+ fReaders[i - 1].setCanvas(canvas);
+ }
+ canvas->unref();
+ }
+}
+
+void TiledPipeController::notifyWritten(size_t bytes) {
+ for (int i = 0; i < NumberOfTiles - 1; i++) {
+ fReaders[i].playback(this->getData(), bytes);
+ }
+ this->INHERITED::notifyWritten(bytes);
+}