[Ozone] Adding HardwareDisplayController implementation

ui/gfx/ozone/impl/drm_wrapper_ozone.cc

+// Copyright (c) 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/impl/drm_wrapper_ozone.h"
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <xf86drmMode.h>
+
+#include "base/logging.h"
+
+namespace gfx {
+
+DrmWrapperOzone::DrmWrapperOzone(const char* device_path) {
+  fd_ = open(device_path, O_RDWR | O_CLOEXEC);
+}
+
+DrmWrapperOzone::~DrmWrapperOzone() {
+  if (fd_ >= 0)
+    close(fd_);
+}
+
+drmModeCrtc* DrmWrapperOzone::GetCrtc(uint32_t crtc_id) {
+  CHECK(fd_ >= 0);
+  return drmModeGetCrtc(fd_, crtc_id);
+}
+
+void DrmWrapperOzone::FreeCrtc(drmModeCrtc* crtc) {
+  drmModeFreeCrtc(crtc);
+}
+
+bool DrmWrapperOzone::SetCrtc(uint32_t crtc_id,
+                              uint32_t framebuffer,
+                              uint32_t* connectors,
+                              drmModeModeInfo* mode) {
+  CHECK(fd_ >= 0);
+  return !drmModeSetCrtc(fd_, crtc_id, framebuffer, 0, 0, connectors, 1, mode);
+}
+
+bool DrmWrapperOzone::SetCrtc(drmModeCrtc* crtc, uint32_t* connectors) {
+  CHECK(fd_ >= 0);
+  return !drmModeSetCrtc(fd_,
+                         crtc->crtc_id,
+                         crtc->buffer_id,
+                         crtc->x,
+                         crtc->y,
+                         connectors,
+                         1,
+                         &crtc->mode);
+}
+
+bool DrmWrapperOzone::AddFramebuffer(const drmModeModeInfo& mode,
+                                     uint8_t depth,
+                                     uint8_t bpp,
+                                     uint32_t stride,
+                                     uint32_t handle,
+                                     uint32_t* framebuffer) {
+  CHECK(fd_ >= 0);
+  return !drmModeAddFB(fd_,
+                       mode.hdisplay,
+                       mode.vdisplay,
+                       depth,
+                       bpp,
+                       stride,
+                       handle,
+                       framebuffer);
+}
+
+bool DrmWrapperOzone::RemoveFramebuffer(uint32_t framebuffer) {
+  CHECK(fd_ >= 0);
+  return !drmModeRmFB(fd_, framebuffer);
+}
+
+bool DrmWrapperOzone::PageFlip(uint32_t crtc_id,
+                               uint32_t framebuffer,
+                               void* data) {
+  CHECK(fd_ >= 0);
+  return !drmModePageFlip(fd_,
+                          crtc_id,
+                          framebuffer,
+                          DRM_MODE_PAGE_FLIP_EVENT,
+                          data);
+}
+
+}  // namespace gfx