[Ozone] Rename and split the DRI platform for clarity

This CL does the following:
 - Moves the files in ui/ozone/platform/dri to ui/ozone/platform/drm
   since the platform name should really be DRM rather than DRI. Note,
   that the platform is still refered to as "dri" in GYP/GN since CrOS
   builds are still using the 'dri' name.
 - Rename all files with a "_dri*" suffix to a "drm_" prefix. Also
   rename all files with a "dri_" prefix to a "drm_" prefix.
 - Rename NativeDisplayDelegateDri to DrmDisplayDelegateManager since it
   is no longer dependent on the NativeDisplayDelegate interface and the
   new name better describes its intent.
 - Split the files in the platform into 2 sub-folders ("host" and
   "gpu"). Depending on the intended use place of the objects (Browser
   (host) process or GPU process) the files in the platform are split
   accordingly in the 2 sub-folders.

BUG=none
TBR=jam@chromium.org

Review URL: https://codereview.chromium.org/975063002

Cr-Commit-Position: refs/heads/master@{#319320}

1 files changed, 114 insertions, 0 deletions

diff --git a/ui/ozone/platform/drm/gpu/drm_buffer.cc b/ui/ozone/platform/drm/gpu/drm_buffer.cc
new file mode 100644
index 0000000..12e0a8e
--- /dev/null
+++ b/ui/ozone/platform/drm/gpu/drm_buffer.cc
@@ -0,0 +1,114 @@
+// 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), handle_(0), framebuffer_(0) {
+}
+
+DrmBuffer::~DrmBuffer() {
+  if (!surface_)
+    return;
+
+  if (framebuffer_)
+    drm_->RemoveFramebuffer(framebuffer_);
+
+  SkImageInfo info;
+  void* pixels = const_cast<void*>(surface_->peekPixels(&info, NULL));
+  if (!pixels)
+    return;
+
+  drm_->DestroyDumbBuffer(info, handle_, stride_, pixels);
+}
+
+bool DrmBuffer::Initialize(const SkImageInfo& info,
+                           bool should_register_framebuffer) {
+  void* pixels = NULL;
+  if (!drm_->CreateDumbBuffer(info, &handle_, &stride_, &pixels)) {
+    VLOG(2) << "Cannot create drm dumb buffer";
+    return false;
+  }
+
+  if (should_register_framebuffer &&
+      !drm_->AddFramebuffer(
+          info.width(), info.height(), GetColorDepth(info.colorType()),
+          info.bytesPerPixel() << 3, stride_, handle_, &framebuffer_)) {
+    VLOG(2) << "Failed to register framebuffer: " << strerror(errno);
+    return false;
+  }
+
+  surface_ = skia::AdoptRef(SkSurface::NewRasterDirect(info, pixels, stride_));
+  if (!surface_) {
+    VLOG(2) << "Cannot install Skia pixels for drm buffer";
+    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