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/gpu/drm_device.h"
  12 #include "ui/ozone/platform/drm/gpu/drm_util.h"
  13 #include "ui/ozone/platform/drm/gpu/scoped_drm_types.h"
  14
  15 namespace ui {
  16
  17 DrmConsoleBuffer::DrmConsoleBuffer(const scoped_refptr<DrmDevice>& drm,
  18                                    uint32_t framebuffer)
  19     : drm_(drm),
  20       handle_(0),
  21       framebuffer_(framebuffer),
  22       mmap_base_(NULL),
  23       mmap_size_(0) {
  24 }
  25
  26 DrmConsoleBuffer::~DrmConsoleBuffer() {
  27   if (mmap_base_)
  28     if (munmap(mmap_base_, mmap_size_))
  29       PLOG(ERROR) << "munmap";
  30 }
  31
  32 bool DrmConsoleBuffer::Initialize() {
  33   ScopedDrmFramebufferPtr fb(drm_->GetFramebuffer(framebuffer_));
  34
  35   if (!fb)
  36     return false;
  37
  38   handle_ = fb->handle;
  39   stride_ = fb->pitch;
  40   SkImageInfo info = SkImageInfo::MakeN32Premul(fb->width, fb->height);
  41
  42   mmap_size_ = info.getSafeSize(stride_);
  43
  44   if (!MapDumbBuffer(drm_->get_fd(), fb->handle, mmap_size_, &mmap_base_)) {
  45     mmap_base_ = NULL;
  46     return false;
  47   }
  48
  49   surface_ =
  50       skia::AdoptRef(SkSurface::NewRasterDirect(info, mmap_base_, stride_));
  51   if (!surface_)
  52     return false;
  53
  54   return true;
  55 }
  56
  57 }  // namespace ui