ui/ozone/platform/drm/gpu/drm_console_buffer.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/ozone/platform/drm/gpu/drm_console_buffer.h"
   6
   7 #include <sys/mman.h>
   8 #include <xf86drmMode.h>
   9
  10 #include "third_party/skia/include/core/SkCanvas.h"
  11 #include "ui/ozone/platform/drm/common/scoped_drm_types.h"
  12 #include "ui/ozone/platform/drm/gpu/drm_device.h"
  13
  14 namespace ui {
  15
  16 DrmConsoleBuffer::DrmConsoleBuffer(const scoped_refptr<DrmDevice>& drm,
  17                                    uint32_t framebuffer)
  18     : drm_(drm), framebuffer_(framebuffer) {
  19 }
  20
  21 DrmConsoleBuffer::~DrmConsoleBuffer() {
  22   if (mmap_base_)
  23     if (munmap(mmap_base_, mmap_size_))
  24       PLOG(ERROR) << "munmap";
  25
  26   if (handle_ && !drm_->CloseBufferHandle(handle_))
  27     PLOG(ERROR) << "DrmConsoleBuffer: CloseBufferHandle: handle " << handle_;
  28 }
  29
  30 bool DrmConsoleBuffer::Initialize() {
  31   ScopedDrmFramebufferPtr fb(drm_->GetFramebuffer(framebuffer_));
  32
  33   if (!fb)
  34     return false;
  35
  36   handle_ = fb->handle;
  37   stride_ = fb->pitch;
  38   SkImageInfo info = SkImageInfo::MakeN32Premul(fb->width, fb->height);
  39
  40   mmap_size_ = info.getSafeSize(stride_);
  41
  42   if (!drm_->MapDumbBuffer(fb->handle, mmap_size_, &mmap_base_)) {
  43     mmap_base_ = NULL;
  44     return false;
  45   }
  46
  47   surface_ =
  48       skia::AdoptRef(SkSurface::NewRasterDirect(info, mmap_base_, stride_));
  49   if (!surface_)
  50     return false;
  51
  52   return true;
  53 }
  54
  55 }  // namespace ui