Ozone integration.

ui/ozone/platform/drm/gpu/drm_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/drm_buffer.h"
+
+#include "base/logging.h"
+#include "ui/ozone/platform/drm/gpu/drm_device.h"
+
+namespace ui {
+
+namespace {
+
+// Modesetting cannot happen from a buffer with transparencies. Return the size
+// of a pixel without alpha.
+uint8_t GetColorDepth(SkColorType type) {
+  switch (type) {
+    case kUnknown_SkColorType:
+    case kAlpha_8_SkColorType:
+      return 0;
+    case kIndex_8_SkColorType:
+      return 8;
+    case kRGB_565_SkColorType:
+      return 16;
+    case kARGB_4444_SkColorType:
+      return 12;
+    case kN32_SkColorType:
+      return 24;
+    default:
+      NOTREACHED();
+      return 0;
+  }
+}
+
+}  // namespace
+
+DrmBuffer::DrmBuffer(const scoped_refptr<DrmDevice>& drm) : drm_(drm) {
+}
+
+DrmBuffer::~DrmBuffer() {
+  surface_.clear();
+
+  if (framebuffer_ && !drm_->RemoveFramebuffer(framebuffer_))
+    PLOG(ERROR) << "DrmBuffer: RemoveFramebuffer: fb " << framebuffer_;
+
+  if (mmap_base_ && !drm_->UnmapDumbBuffer(mmap_base_, mmap_size_))
+    PLOG(ERROR) << "DrmBuffer: UnmapDumbBuffer: handle " << handle_;
+
+  if (handle_ && !drm_->DestroyDumbBuffer(handle_))
+    PLOG(ERROR) << "DrmBuffer: DestroyDumbBuffer: handle " << handle_;
+}
+
+bool DrmBuffer::Initialize(const SkImageInfo& info,
+                           bool should_register_framebuffer) {
+  if (!drm_->CreateDumbBuffer(info, &handle_, &stride_)) {
+    PLOG(ERROR) << "DrmBuffer: CreateDumbBuffer: width " << info.width()
+                << " height " << info.height();
+    return false;
+  }
+
+  mmap_size_ = info.getSafeSize(stride_);
+  if (!drm_->MapDumbBuffer(handle_, mmap_size_, &mmap_base_)) {
+    PLOG(ERROR) << "DrmBuffer: MapDumbBuffer: handle " << handle_;
+    return false;
+  }
+
+  if (should_register_framebuffer &&
+      !drm_->AddFramebuffer(
+          info.width(), info.height(), GetColorDepth(info.colorType()),
+          info.bytesPerPixel() << 3, stride_, handle_, &framebuffer_)) {
+    PLOG(ERROR) << "DrmBuffer: AddFramebuffer: handle " << handle_;
+    return false;
+  }
+
+  surface_ =
+      skia::AdoptRef(SkSurface::NewRasterDirect(info, mmap_base_, stride_));
+  if (!surface_) {
+    LOG(ERROR) << "DrmBuffer: Failed to create SkSurface: handle " << handle_;
+    return false;
+  }
+
+  return true;
+}
+
+SkCanvas* DrmBuffer::GetCanvas() const {
+  return surface_->getCanvas();
+}
+
+uint32_t DrmBuffer::GetFramebufferId() const {
+  return framebuffer_;
+}
+
+uint32_t DrmBuffer::GetHandle() const {
+  return handle_;
+}
+
+gfx::Size DrmBuffer::GetSize() const {
+  return gfx::Size(surface_->width(), surface_->height());
+}
+
+DrmBufferGenerator::DrmBufferGenerator() {
+}
+
+DrmBufferGenerator::~DrmBufferGenerator() {
+}
+
+scoped_refptr<ScanoutBuffer> DrmBufferGenerator::Create(
+    const scoped_refptr<DrmDevice>& drm,
+    const gfx::Size& size) {
+  scoped_refptr<DrmBuffer> buffer(new DrmBuffer(drm));
+  SkImageInfo info = SkImageInfo::MakeN32Premul(size.width(), size.height());
+  if (!buffer->Initialize(info, true /* should_register_framebuffer */))
+    return NULL;
+
+  return buffer;
+}
+
+}  // namespace ui