Revert of ozone: Remove the "drm" software composited platform

ui/ozone/platform/drm/gpu/drm_surface_unittest.cc

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/message_loop/message_loop.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/skia/include/core/SkCanvas.h"
+#include "third_party/skia/include/core/SkColor.h"
+#include "third_party/skia/include/core/SkDevice.h"
+#include "ui/ozone/platform/drm/gpu/crtc_controller.h"
+#include "ui/ozone/platform/drm/gpu/drm_buffer.h"
+#include "ui/ozone/platform/drm/gpu/drm_device_generator.h"
+#include "ui/ozone/platform/drm/gpu/drm_device_manager.h"
+#include "ui/ozone/platform/drm/gpu/drm_surface.h"
+#include "ui/ozone/platform/drm/gpu/drm_window.h"
+#include "ui/ozone/platform/drm/gpu/hardware_display_controller.h"
+#include "ui/ozone/platform/drm/gpu/screen_manager.h"
+#include "ui/ozone/platform/drm/test/mock_drm_device.h"
+
+namespace {
+
+// Create a basic mode for a 6x4 screen.
+const drmModeModeInfo kDefaultMode =
+    {0, 6, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, {'\0'}};
+
+const gfx::AcceleratedWidget kDefaultWidgetHandle = 1;
+const uint32_t kDefaultCrtc = 1;
+const uint32_t kDefaultConnector = 2;
+const size_t kPlanesPerCrtc = 1;
+const uint32_t kDefaultCursorSize = 64;
+
+std::vector<skia::RefPtr<SkSurface>> GetFramebuffers(ui::MockDrmDevice* drm) {
+  std::vector<skia::RefPtr<SkSurface>> framebuffers;
+  for (const auto& buffer : drm->buffers()) {
+    // Skip destroyed buffers and cursor buffers.
+    if (!buffer || (buffer->width() == kDefaultCursorSize &&
+                    buffer->height() == kDefaultCursorSize))
+      continue;
+
+    framebuffers.push_back(buffer);
+  }
+
+  return framebuffers;
+}
+
+}  // namespace
+
+class DrmSurfaceTest : public testing::Test {
+ public:
+  DrmSurfaceTest() {}
+
+  void SetUp() override;
+  void TearDown() override;
+
+ protected:
+  scoped_ptr<base::MessageLoop> message_loop_;
+  scoped_refptr<ui::MockDrmDevice> drm_;
+  scoped_ptr<ui::DrmBufferGenerator> buffer_generator_;
+  scoped_ptr<ui::ScreenManager> screen_manager_;
+  scoped_ptr<ui::DrmDeviceManager> drm_device_manager_;
+  scoped_ptr<ui::DrmSurface> surface_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(DrmSurfaceTest);
+};
+
+void DrmSurfaceTest::SetUp() {
+  message_loop_.reset(new base::MessageLoopForUI);
+  std::vector<uint32_t> crtcs;
+  crtcs.push_back(kDefaultCrtc);
+  drm_ = new ui::MockDrmDevice(false, crtcs, kPlanesPerCrtc);
+  buffer_generator_.reset(new ui::DrmBufferGenerator());
+  screen_manager_.reset(new ui::ScreenManager(buffer_generator_.get()));
+  screen_manager_->AddDisplayController(drm_, kDefaultCrtc, kDefaultConnector);
+  screen_manager_->ConfigureDisplayController(
+      drm_, kDefaultCrtc, kDefaultConnector, gfx::Point(), kDefaultMode);
+
+  drm_device_manager_.reset(new ui::DrmDeviceManager(nullptr));
+  scoped_ptr<ui::DrmWindow> window(new ui::DrmWindow(
+      kDefaultWidgetHandle, drm_device_manager_.get(), screen_manager_.get()));
+  window->Initialize();
+  window->OnBoundsChanged(
+      gfx::Rect(gfx::Size(kDefaultMode.hdisplay, kDefaultMode.vdisplay)));
+  screen_manager_->AddWindow(kDefaultWidgetHandle, window.Pass());
+
+  surface_.reset(
+      new ui::DrmSurface(screen_manager_->GetWindow(kDefaultWidgetHandle)));
+  surface_->ResizeCanvas(
+      gfx::Size(kDefaultMode.hdisplay, kDefaultMode.vdisplay));
+
+  // The window has been remapped to a controller. The first swap will cause the
+  // SWAP_NAK_RECREATE_BUFFERS without actually using the buffers.
+  surface_->PresentCanvas(gfx::Rect());
+}
+
+void DrmSurfaceTest::TearDown() {
+  surface_.reset();
+  scoped_ptr<ui::DrmWindow> window =
+      screen_manager_->RemoveWindow(kDefaultWidgetHandle);
+  window->Shutdown();
+  drm_ = nullptr;
+  message_loop_.reset();
+}
+
+TEST_F(DrmSurfaceTest, CheckFBIDOnSwap) {
+  surface_->PresentCanvas(gfx::Rect());
+  drm_->RunCallbacks();
+
+  // Framebuffer ID 1 is allocated in SetUp for the buffer used to modeset and
+  // framebuffer ID 2 is used when the window to display mapping is done.
+  EXPECT_EQ(3u, drm_->current_framebuffer());
+  surface_->PresentCanvas(gfx::Rect());
+  drm_->RunCallbacks();
+  EXPECT_EQ(4u, drm_->current_framebuffer());
+}
+
+TEST_F(DrmSurfaceTest, CheckSurfaceContents) {
+  SkPaint paint;
+  paint.setColor(SK_ColorWHITE);
+  SkRect rect =
+      SkRect::MakeWH(kDefaultMode.hdisplay / 2, kDefaultMode.vdisplay / 2);
+  surface_->GetSurface()->getCanvas()->drawRect(rect, paint);
+  surface_->PresentCanvas(
+      gfx::Rect(0, 0, kDefaultMode.hdisplay / 2, kDefaultMode.vdisplay / 2));
+  drm_->RunCallbacks();
+
+  SkBitmap image;
+  std::vector<skia::RefPtr<SkSurface>> framebuffers =
+      GetFramebuffers(drm_.get());
+
+  // Buffer 0 is the modesetting buffer, buffer 2 is the frontbuffer and buffer
+  // 1 is the backbuffer.
+  EXPECT_EQ(3u, framebuffers.size());
+
+  image.setInfo(framebuffers[1]->getCanvas()->imageInfo());
+  EXPECT_TRUE(framebuffers[1]->getCanvas()->readPixels(&image, 0, 0));
+
+  EXPECT_EQ(kDefaultMode.hdisplay, image.width());
+  EXPECT_EQ(kDefaultMode.vdisplay, image.height());
+
+  // Make sure the updates are correctly propagated to the native surface.
+  for (int i = 0; i < image.height(); ++i) {
+    for (int j = 0; j < image.width(); ++j) {
+      if (j < kDefaultMode.hdisplay / 2 && i < kDefaultMode.vdisplay / 2)
+        EXPECT_EQ(SK_ColorWHITE, image.getColor(j, i));
+      else
+        EXPECT_EQ(SK_ColorBLACK, image.getColor(j, i));
+    }
+  }
+}
+
+TEST_F(DrmSurfaceTest, CheckSurfaceContentsAfter2QueuedPresents) {
+  gfx::Rect rect;
+  // Present an empty buffer but don't respond with the page flip event since we
+  // want to make sure the following presents will aggregate correctly.
+  surface_->PresentCanvas(rect);
+
+  SkPaint paint;
+  paint.setColor(SK_ColorWHITE);
+  rect.SetRect(0, 0, kDefaultMode.hdisplay / 2, kDefaultMode.vdisplay / 2);
+  surface_->GetSurface()->getCanvas()->drawRect(RectToSkRect(rect), paint);
+  surface_->PresentCanvas(rect);
+
+  paint.setColor(SK_ColorRED);
+  rect.SetRect(0, kDefaultMode.vdisplay / 2, kDefaultMode.hdisplay / 2,
+               kDefaultMode.vdisplay / 2);
+  surface_->GetSurface()->getCanvas()->drawRect(RectToSkRect(rect), paint);
+  surface_->PresentCanvas(rect);
+
+  drm_->RunCallbacks();
+
+  SkBitmap image;
+  std::vector<skia::RefPtr<SkSurface>> framebuffers =
+      GetFramebuffers(drm_.get());
+
+  // Buffer 0 is the modesetting buffer, buffer 2 is the backbuffer and buffer
+  // 1 is the frontbuffer.
+  EXPECT_EQ(3u, framebuffers.size());
+
+  image.setInfo(framebuffers[2]->getCanvas()->imageInfo());
+  EXPECT_TRUE(framebuffers[2]->getCanvas()->readPixels(&image, 0, 0));
+
+  EXPECT_EQ(kDefaultMode.hdisplay, image.width());
+  EXPECT_EQ(kDefaultMode.vdisplay, image.height());
+
+  // Make sure the updates are correctly propagated to the native surface.
+  for (int i = 0; i < image.height(); ++i) {
+    for (int j = 0; j < image.width(); ++j) {
+      if (j < kDefaultMode.hdisplay / 2 && i < kDefaultMode.vdisplay / 2)
+        EXPECT_EQ(SK_ColorWHITE, image.getColor(j, i));
+      else if (j < kDefaultMode.hdisplay / 2)
+        EXPECT_EQ(SK_ColorRED, image.getColor(j, i));
+      else
+        EXPECT_EQ(SK_ColorBLACK, image.getColor(j, i));
+    }
+  }
+}