Sketch DM refactor.

dm/DMTask.cpp

-#include "DMTask.h"
-#include "DMTaskRunner.h"
-#include "SkCommonFlags.h"
-
-namespace DM {
-
-Task::Task(Reporter* reporter, TaskRunner* taskRunner)
-    : fReporter(reporter)
-    , fTaskRunner(taskRunner)
-    , fDepth(0) {
-    fReporter->taskCreated();
-}
-
-Task::Task(const Task& parent)
-    : fReporter(parent.fReporter)
-    , fTaskRunner(parent.fTaskRunner)
-    , fDepth(parent.depth() + 1) {
-    fReporter->taskCreated();
-}
-
-Task::~Task() {
-    fReporter->taskDestroyed();
-}
-
-void Task::fail(const char* msg) {
-    SkString failure(this->name());
-    if (msg) {
-        failure.appendf(": %s", msg);
-    }
-    fReporter->fail(failure);
-}
-
-void Task::start() {
-    fStart = SkTime::GetMSecs();
-}
-
-void Task::finish() {
-    fReporter->printStatus(this->name(), SkTime::GetMSecs() - fStart);
-}
-
-void Task::reallySpawnChild(CpuTask* task) {
-    fTaskRunner->add(task);
-}
-
-CpuTask::CpuTask(Reporter* reporter, TaskRunner* taskRunner) : Task(reporter, taskRunner) {}
-CpuTask::CpuTask(const Task& parent) : Task(parent) {}
-
-void CpuTask::run() {
-    // If the task says skip, or if we're starting a top-level CPU task and we don't want to, skip.
-    const bool skip = this->shouldSkip() || (this->depth() == 0 && !FLAGS_cpu);
-    if (!skip) {
-        this->start();
-        if (!FLAGS_dryRun) this->draw();
-        this->finish();
-    }
-    SkDELETE(this);
-}
-
-void CpuTask::spawnChild(CpuTask* task) {
-    // Run children serially on this (CPU) thread.  This tends to save RAM and is usually no slower.
-    // Calling reallySpawnChild() is nearly equivalent, but it'd pointlessly contend on the
-    // threadpool; reallySpawnChild() is most useful when you want to change threadpools.
-    task->run();
-}
-
-GpuTask::GpuTask(Reporter* reporter, TaskRunner* taskRunner) : Task(reporter, taskRunner) {}
-
-void GpuTask::run(GrContextFactory* factory) {
-    // If the task says skip, or if we're starting a top-level GPU task and we don't want to, skip.
-    const bool skip = this->shouldSkip() || (this->depth() == 0 && !FLAGS_gpu);
-    if (!skip) {
-        this->start();
-        if (!FLAGS_dryRun) this->draw(factory);
-        this->finish();
-        if (FLAGS_abandonGpuContext) {
-            factory->abandonContexts();
-        }
-        if (FLAGS_resetGpuContext || FLAGS_abandonGpuContext) {
-            factory->destroyContexts();
-        }
-    }
-    SkDELETE(this);
-}
-
-void GpuTask::spawnChild(CpuTask* task) {
-    // Spawn a new task so it runs on the CPU threadpool instead of the GPU one we're on now.
-    // It goes on the front of the queue to minimize the time we must hold reference bitmaps in RAM.
-    this->reallySpawnChild(task);
-}
-
-}  // namespace DM