Skeleton of DM

dm/DMGpuTask.cpp

+#include "DMGpuTask.h"
+
+#include "DMComparisonTask.h"
+#include "DMUtil.h"
+#include "SkCommandLineFlags.h"
+#include "SkGpuDevice.h"
+#include "SkTLS.h"
+
+namespace DM {
+
+GpuTask::GpuTask(const char* name,
+                 Reporter* reporter,
+                 TaskRunner* taskRunner,
+                 const skiagm::ExpectationsSource& expectations,
+                 skiagm::GMRegistry::Factory gmFactory,
+                 SkBitmap::Config config,
+                 GrContextFactory::GLContextType contextType,
+                 int sampleCount)
+    : Task(reporter, taskRunner)
+    , fGM(gmFactory(NULL))
+    , fName(underJoin(fGM->shortName(), name))
+    , fExpectations(expectations.get(png(fName).c_str()))
+    , fConfig(config)
+    , fContextType(contextType)
+    , fSampleCount(sampleCount)
+    {}
+
+GrContextFactory* GpuTask::GetGrFactory() {
+    return reinterpret_cast<GrContextFactory*>(SkTLS::Get(&NewGrContextFactory,
+                                                          &DeleteGrContextFactory));
+}
+
+void* GpuTask::NewGrContextFactory() {
+    return SkNEW(GrContextFactory);
+}
+
+void GpuTask::DeleteGrContextFactory(void* factory) {
+    return SkDELETE((GrContextFactory*) factory);
+}
+
+void GpuTask::draw() {
+    GrContext* gr = GetGrFactory()->get(fContextType);  // Will be owned by device.
+    SkGpuDevice device(gr, fConfig, fGM->width(), fGM->height(), fSampleCount);
+    SkCanvas canvas(&device);
+
+    canvas.concat(fGM->getInitialTransform());
+    fGM->draw(&canvas);
+    canvas.flush();
+
+    SkBitmap bitmap;
+    bitmap.setConfig(fConfig, fGM->width(), fGM->height());
+    canvas.readPixels(&bitmap, 0, 0);
+
+    // We offload checksum comparison to the main CPU threadpool.
+    // This cuts run time by about 30%.
+    this->spawnChild(SkNEW_ARGS(ComparisonTask, (*this, fExpectations, bitmap)));
+}
+
+bool GpuTask::shouldSkip() const {
+    return fGM->getFlags() & skiagm::GM::kSkipGPU_Flag;
+}
+
+}  // namespace DM