Ozone integration.

ui/ozone/platform/drm/gpu/gbm_buffer.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 "ui/ozone/platform/drm/gpu/gbm_buffer.h"
+
+#include <drm.h>
+#include <fcntl.h>
+#include <gbm.h>
+#include <xf86drm.h>
+
+#include "base/logging.h"
+#include "base/trace_event/trace_event.h"
+#include "ui/ozone/platform/drm/gpu/drm_window.h"
+#include "ui/ozone/platform/drm/gpu/gbm_device.h"
+
+namespace ui {
+
+namespace {
+
+int GetGbmFormatFromBufferFormat(SurfaceFactoryOzone::BufferFormat fmt) {
+  switch (fmt) {
+    case SurfaceFactoryOzone::BGRA_8888:
+      return GBM_BO_FORMAT_ARGB8888;
+    case SurfaceFactoryOzone::RGBX_8888:
+      return GBM_BO_FORMAT_XRGB8888;
+    default:
+      NOTREACHED();
+      return 0;
+  }
+}
+
+}  // namespace
+
+GbmBuffer::GbmBuffer(const scoped_refptr<GbmDevice>& gbm,
+                     gbm_bo* bo,
+                     bool scanout)
+    : GbmBufferBase(gbm, bo, scanout) {
+}
+
+GbmBuffer::~GbmBuffer() {
+  if (bo())
+    gbm_bo_destroy(bo());
+}
+
+// static
+scoped_refptr<GbmBuffer> GbmBuffer::CreateBuffer(
+    const scoped_refptr<GbmDevice>& gbm,
+    SurfaceFactoryOzone::BufferFormat format,
+    const gfx::Size& size,
+    bool scanout) {
+  TRACE_EVENT2("drm", "GbmBuffer::CreateBuffer", "device",
+               gbm->device_path().value(), "size", size.ToString());
+  unsigned flags = GBM_BO_USE_RENDERING;
+  if (scanout)
+    flags |= GBM_BO_USE_SCANOUT;
+  gbm_bo* bo = gbm_bo_create(gbm->device(), size.width(), size.height(),
+                             GetGbmFormatFromBufferFormat(format), flags);
+  if (!bo)
+    return NULL;
+
+  scoped_refptr<GbmBuffer> buffer(new GbmBuffer(gbm, bo, scanout));
+  if (scanout && !buffer->GetFramebufferId())
+    return NULL;
+
+  return buffer;
+}
+
+GbmPixmap::GbmPixmap(const scoped_refptr<GbmBuffer>& buffer,
+                     ScreenManager* screen_manager)
+    : buffer_(buffer), screen_manager_(screen_manager) {
+}
+
+bool GbmPixmap::Initialize() {
+  // We want to use the GBM API because it's going to call into libdrm
+  // which might do some optimizations on buffer allocation,
+  // especially when sharing buffers via DMABUF.
+  dma_buf_ = gbm_bo_get_fd(buffer_->bo());
+  if (dma_buf_ < 0) {
+    PLOG(ERROR) << "Failed to export buffer to dma_buf";
+    return false;
+  }
+  return true;
+}
+
+GbmPixmap::~GbmPixmap() {
+  if (dma_buf_ > 0)
+    close(dma_buf_);
+}
+
+void* GbmPixmap::GetEGLClientBuffer() {
+  return nullptr;
+}
+
+int GbmPixmap::GetDmaBufFd() {
+  return dma_buf_;
+}
+
+int GbmPixmap::GetDmaBufPitch() {
+  return gbm_bo_get_stride(buffer_->bo());
+}
+
+bool GbmPixmap::ScheduleOverlayPlane(gfx::AcceleratedWidget widget,
+                                     int plane_z_order,
+                                     gfx::OverlayTransform plane_transform,
+                                     const gfx::Rect& display_bounds,
+                                     const gfx::RectF& crop_rect) {
+  screen_manager_->GetWindow(widget)->QueueOverlayPlane(OverlayPlane(
+      buffer_, plane_z_order, plane_transform, display_bounds, crop_rect));
+  return true;
+}
+
+}  // namespace ui