GBM Ozone implementation

ui/gfx/ozone/dri/gbm_surface_factory.cc

+// Copyright 2013 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 "ui/gfx/ozone/dri/gbm_surface_factory.h"
+
+#include <drm.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <xf86drm.h>
+
+#include "base/files/file_path.h"
+#include "base/message_loop/message_loop.h"
+#include "base/native_library.h"
+#include "third_party/khronos/EGL/egl.h"
+#include "third_party/khronos/EGL/eglext.h"
+#include "third_party/mesa/src/src/gbm/main/gbm.h"
+#include "third_party/skia/include/core/SkBitmapDevice.h"
+#include "third_party/skia/include/core/SkCanvas.h"
+#include "ui/gfx/ozone/dri/dri_wrapper.h"
+#include "ui/gfx/ozone/dri/gbm_surface.h"
+#include "ui/gfx/ozone/dri/hardware_display_controller.h"
+#include "ui/gfx/ozone/dri/scanout_surface.h"
+
+namespace gfx {
+
+namespace {
+
+typedef EGLBoolean (*eglSwapBuffersProc)(EGLDisplay dpy, EGLSurface surface);
+
+static eglSwapBuffersProc g_native_egl_swap_buffers;
+
+EGLBoolean CustomEglSwapBuffers(EGLDisplay dpy, EGLSurface surface) {
+  EGLBoolean ret = g_native_egl_swap_buffers(dpy, surface);
+
+  // TODO(dnicoara) Once we support multiple displays we need to keep a mapping
+  // between |surface| and AcceleratedWidgets such that we can select the
+  // widget based on the |surface|.
+  if (ret)
+    gfx::SurfaceFactoryOzone::GetInstance()->SchedulePageFlip(1);
+
+  return ret;
+}
+
+}  // namespace
+
+GbmSurfaceFactory::GbmSurfaceFactory()
+    : DriSurfaceFactory(),
+      device_(NULL) {
+}
+
+GbmSurfaceFactory::~GbmSurfaceFactory() {
+  if (state_ == INITIALIZED)
+    ShutdownHardware();
+}
+
+SurfaceFactoryOzone::HardwareState
+GbmSurfaceFactory::InitializeHardware() {
+  CHECK(state_ == UNINITIALIZED);
+
+  if (DriSurfaceFactory::InitializeHardware() != INITIALIZED)
+    return state_;
+
+  device_ = gbm_create_device(drm_->get_fd());
+
+  if (!device_) {
+    LOG(ERROR) << "Cannot create GBM device";
+    state_ = FAILED;
+    return state_;
+  }
+
+  // TODO(dnicoara) Figure out where this initialization needs to be done.
+  if (!controller_.get())
+    controller_.reset(new HardwareDisplayController());
+
+  state_ = INITIALIZED;
+  return state_;
+}
+
+void GbmSurfaceFactory::ShutdownHardware() {
+  CHECK(state_ == INITIALIZED);
+
+  gbm_device_destroy(device_);
+  DriSurfaceFactory::ShutdownHardware();
+}
+
+intptr_t GbmSurfaceFactory::GetNativeDisplay() {
+  CHECK(state_ == INITIALIZED);
+  return reinterpret_cast<intptr_t>(device_);
+}
+
+const int32* GbmSurfaceFactory::GetEGLSurfaceProperties(
+    const int32* desired_list) {
+  static const int32 kConfigAttribs[] = {
+    EGL_BUFFER_SIZE, 32,
+    EGL_ALPHA_SIZE, 8,
+    EGL_BLUE_SIZE, 8,
+    EGL_GREEN_SIZE, 8,
+    EGL_RED_SIZE, 8,
+    EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+    EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
+    EGL_NONE
+  };
+
+  return kConfigAttribs;
+}
+
+bool GbmSurfaceFactory::LoadEGLGLES2Bindings(
+      AddGLLibraryCallback add_gl_library,
+      SetGLGetProcAddressProcCallback set_gl_get_proc_address) {
+  std::string error;
+  base::NativeLibrary gles_library = base::LoadNativeLibrary(
+      base::FilePath("libGLESv2.so.2"),
+      &error);
+  if (!gles_library) {
+    LOG(WARNING) << "Failed to load GLES library: " << error;
+    return false;
+  }
+
+  base::NativeLibrary egl_library = base::LoadNativeLibrary(
+      base::FilePath("libEGL.so.1"),
+      &error);
+  if (!egl_library) {
+    LOG(WARNING) << "Failed to load EGL library: " << error;
+    base::UnloadNativeLibrary(gles_library);
+    return false;
+  }
+
+  GLGetProcAddressProc get_proc_address =
+      reinterpret_cast<GLGetProcAddressProc>(
+          base::GetFunctionPointerFromNativeLibrary(
+              egl_library, "eglGetProcAddress"));
+  if (!get_proc_address) {
+    LOG(ERROR) << "eglGetProcAddress not found.";
+    base::UnloadNativeLibrary(egl_library);
+    base::UnloadNativeLibrary(gles_library);
+    return false;
+  }
+
+  set_gl_get_proc_address.Run(get_proc_address);
+  add_gl_library.Run(egl_library);
+  add_gl_library.Run(gles_library);
+
+  return true;
+}
+
+bool GbmSurfaceFactory::AttemptToResizeAcceleratedWidget(
+    gfx::AcceleratedWidget w,
+    const gfx::Rect& bounds) {
+  return false;
+}
+
+SkCanvas* GbmSurfaceFactory::GetCanvasForWidget(
+    gfx::AcceleratedWidget w) {
+  CHECK(state_ == INITIALIZED);
+  // TODO(dnicoara) Figure out how this is used and unhack.
+  static SkBitmapDevice* device = new SkBitmapDevice(
+      SkBitmap::kARGB_8888_Config,
+      controller_->get_mode().hdisplay,
+      controller_->get_mode().vdisplay);
+  static SkCanvas canvas(device);
+  return &canvas;
+}
+
+bool GbmSurfaceFactory::SchedulePageFlip(gfx::AcceleratedWidget w) {
+  CHECK(state_ == INITIALIZED);
+
+  // TODO(dnicoara) Once we can handle multiple displays this needs to be
+  // changed.
+  CHECK(w == 1);
+
+  static_cast<GbmSurface*>(controller_->get_surface())
+      ->LockCurrentDrawable();
+  return DriSurfaceFactory::SchedulePageFlip(w);
+}
+
+void* GbmSurfaceFactory::GetFunctionPointerFromNativeLibrary(
+    base::NativeLibrary library,
+    const char* name) {
+  void* function = SurfaceFactoryOzone::GetFunctionPointerFromNativeLibrary(
+      library,
+      name);
+
+  if (strcmp(name, "eglSwapBuffers") == 0) {
+    g_native_egl_swap_buffers = reinterpret_cast<eglSwapBuffersProc>(function);
+    function = reinterpret_cast<void*>(CustomEglSwapBuffers);
+  }
+
+  return function;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// DriSurfaceFactory private
+
+ScanoutSurface* GbmSurfaceFactory::CreateSurface(
+    HardwareDisplayController* controller) {
+  return new GbmSurface(controller_.get(), device_);
+}
+
+gfx::AcceleratedWidget GbmSurfaceFactory::GetNativeWidget(
+    ScanoutSurface* surface) {
+  return reinterpret_cast<gfx::AcceleratedWidget>(
+      static_cast<GbmSurface*>(surface)->get_native_surface());
+}
+
+}  // namespace gfx