ui/ozone/platform/drm/gpu/drm_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_buffer.h"
   6
   7 #include "base/logging.h"
   8 #include "ui/ozone/platform/drm/gpu/drm_device.h"
   9
  10 namespace ui {
  11
  12 namespace {
  13
  14 // Modesetting cannot happen from a buffer with transparencies. Return the size
  15 // of a pixel without alpha.
  16 uint8_t GetColorDepth(SkColorType type) {
  17   switch (type) {
  18     case kUnknown_SkColorType:
  19     case kAlpha_8_SkColorType:
  20       return 0;
  21     case kIndex_8_SkColorType:
  22       return 8;
  23     case kRGB_565_SkColorType:
  24       return 16;
  25     case kARGB_4444_SkColorType:
  26       return 12;
  27     case kN32_SkColorType:
  28       return 24;
  29     default:
  30       NOTREACHED();
  31       return 0;
  32   }
  33 }
  34
  35 }  // namespace
  36
  37 DrmBuffer::DrmBuffer(const scoped_refptr<DrmDevice>& drm) : drm_(drm) {
  38 }
  39
  40 DrmBuffer::~DrmBuffer() {
  41   surface_.clear();
  42
  43   if (framebuffer_ && !drm_->RemoveFramebuffer(framebuffer_))
  44     PLOG(ERROR) << "DrmBuffer: RemoveFramebuffer: fb " << framebuffer_;
  45
  46   if (mmap_base_ && !drm_->UnmapDumbBuffer(mmap_base_, mmap_size_))
  47     PLOG(ERROR) << "DrmBuffer: UnmapDumbBuffer: handle " << handle_;
  48
  49   if (handle_ && !drm_->DestroyDumbBuffer(handle_))
  50     PLOG(ERROR) << "DrmBuffer: DestroyDumbBuffer: handle " << handle_;
  51 }
  52
  53 bool DrmBuffer::Initialize(const SkImageInfo& info,
  54                            bool should_register_framebuffer) {
  55   if (!drm_->CreateDumbBuffer(info, &handle_, &stride_)) {
  56     PLOG(ERROR) << "DrmBuffer: CreateDumbBuffer: width " << info.width()
  57                 << " height " << info.height();
  58     return false;
  59   }
  60
  61   mmap_size_ = info.getSafeSize(stride_);
  62   if (!drm_->MapDumbBuffer(handle_, mmap_size_, &mmap_base_)) {
  63     PLOG(ERROR) << "DrmBuffer: MapDumbBuffer: handle " << handle_;
  64     return false;
  65   }
  66
  67   if (should_register_framebuffer &&
  68       !drm_->AddFramebuffer(
  69           info.width(), info.height(), GetColorDepth(info.colorType()),
  70           info.bytesPerPixel() << 3, stride_, handle_, &framebuffer_)) {
  71     PLOG(ERROR) << "DrmBuffer: AddFramebuffer: handle " << handle_;
  72     return false;
  73   }
  74
  75   surface_ =
  76       skia::AdoptRef(SkSurface::NewRasterDirect(info, mmap_base_, stride_));
  77   if (!surface_) {
  78     LOG(ERROR) << "DrmBuffer: Failed to create SkSurface: handle " << handle_;
  79     return false;
  80   }
  81
  82   return true;
  83 }
  84
  85 SkCanvas* DrmBuffer::GetCanvas() const {
  86   return surface_->getCanvas();
  87 }
  88
  89 uint32_t DrmBuffer::GetFramebufferId() const {
  90   return framebuffer_;
  91 }
  92
  93 uint32_t DrmBuffer::GetHandle() const {
  94   return handle_;
  95 }
  96
  97 gfx::Size DrmBuffer::GetSize() const {
  98   return gfx::Size(surface_->width(), surface_->height());
  99 }
 100
 101 DrmBufferGenerator::DrmBufferGenerator() {
 102 }
 103
 104 DrmBufferGenerator::~DrmBufferGenerator() {
 105 }
 106
 107 scoped_refptr<ScanoutBuffer> DrmBufferGenerator::Create(
 108     const scoped_refptr<DrmDevice>& drm,
 109     const gfx::Size& size) {
 110   scoped_refptr<DrmBuffer> buffer(new DrmBuffer(drm));
 111   SkImageInfo info = SkImageInfo::MakeN32Premul(size.width(), size.height());
 112   if (!buffer->Initialize(info, true /* should_register_framebuffer */))
 113     return NULL;
 114
 115   return buffer;
 116 }
 117
 118 }  // namespace ui