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 <drm_fourcc.h>
   8
   9 #include "base/logging.h"
  10 #include "ui/ozone/platform/drm/gpu/drm_device.h"
  11
  12 namespace ui {
  13
  14 namespace {
  15
  16 // Modesetting cannot happen from a buffer with transparencies. Return the size
  17 // of a pixel without alpha.
  18 uint8_t GetColorDepth(SkColorType type) {
  19   switch (type) {
  20     case kUnknown_SkColorType:
  21     case kAlpha_8_SkColorType:
  22       return 0;
  23     case kIndex_8_SkColorType:
  24       return 8;
  25     case kRGB_565_SkColorType:
  26       return 16;
  27     case kARGB_4444_SkColorType:
  28       return 12;
  29     case kN32_SkColorType:
  30       return 24;
  31     default:
  32       NOTREACHED();
  33       return 0;
  34   }
  35 }
  36
  37 // We always ignore Alpha.
  38 uint32_t GetFourCCCodeForSkColorType(SkColorType type) {
  39   switch (type) {
  40     case kUnknown_SkColorType:
  41     case kAlpha_8_SkColorType:
  42       return 0;
  43     case kIndex_8_SkColorType:
  44       return DRM_FORMAT_C8;
  45     case kRGB_565_SkColorType:
  46       return DRM_FORMAT_RGB565;
  47     case kARGB_4444_SkColorType:
  48       return DRM_FORMAT_XRGB4444;
  49     case kN32_SkColorType:
  50       return DRM_FORMAT_XRGB8888;
  51     default:
  52       NOTREACHED();
  53       return 0;
  54   }
  55 }
  56
  57 }  // namespace
  58
  59 DrmBuffer::DrmBuffer(const scoped_refptr<DrmDevice>& drm) : drm_(drm) {
  60 }
  61
  62 DrmBuffer::~DrmBuffer() {
  63   surface_.clear();
  64
  65   if (framebuffer_ && !drm_->RemoveFramebuffer(framebuffer_))
  66     PLOG(ERROR) << "DrmBuffer: RemoveFramebuffer: fb " << framebuffer_;
  67
  68   if (mmap_base_ && !drm_->UnmapDumbBuffer(mmap_base_, mmap_size_))
  69     PLOG(ERROR) << "DrmBuffer: UnmapDumbBuffer: handle " << handle_;
  70
  71   if (handle_ && !drm_->DestroyDumbBuffer(handle_))
  72     PLOG(ERROR) << "DrmBuffer: DestroyDumbBuffer: handle " << handle_;
  73 }
  74
  75 bool DrmBuffer::Initialize(const SkImageInfo& info,
  76                            bool should_register_framebuffer) {
  77   if (!drm_->CreateDumbBuffer(info, &handle_, &stride_)) {
  78     PLOG(ERROR) << "DrmBuffer: CreateDumbBuffer: width " << info.width()
  79                 << " height " << info.height();
  80     return false;
  81   }
  82
  83   mmap_size_ = info.getSafeSize(stride_);
  84   if (!drm_->MapDumbBuffer(handle_, mmap_size_, &mmap_base_)) {
  85     PLOG(ERROR) << "DrmBuffer: MapDumbBuffer: handle " << handle_;
  86     return false;
  87   }
  88
  89   if (should_register_framebuffer) {
  90     if (!drm_->AddFramebuffer(
  91             info.width(), info.height(), GetColorDepth(info.colorType()),
  92             info.bytesPerPixel() << 3, stride_, handle_, &framebuffer_)) {
  93       PLOG(ERROR) << "DrmBuffer: AddFramebuffer: handle " << handle_;
  94       return false;
  95     }
  96
  97     fb_pixel_format_ = GetFourCCCodeForSkColorType(info.colorType());
  98   }
  99
 100   surface_ =
 101       skia::AdoptRef(SkSurface::NewRasterDirect(info, mmap_base_, stride_));
 102   if (!surface_) {
 103     LOG(ERROR) << "DrmBuffer: Failed to create SkSurface: handle " << handle_;
 104     return false;
 105   }
 106
 107   return true;
 108 }
 109
 110 SkCanvas* DrmBuffer::GetCanvas() const {
 111   return surface_->getCanvas();
 112 }
 113
 114 uint32_t DrmBuffer::GetFramebufferId() const {
 115   return framebuffer_;
 116 }
 117
 118 uint32_t DrmBuffer::GetFramebufferPixelFormat() const {
 119   return fb_pixel_format_;
 120 }
 121
 122 uint32_t DrmBuffer::GetHandle() const {
 123   return handle_;
 124 }
 125
 126 gfx::Size DrmBuffer::GetSize() const {
 127   return gfx::Size(surface_->width(), surface_->height());
 128 }
 129
 130 DrmBufferGenerator::DrmBufferGenerator() {
 131 }
 132
 133 DrmBufferGenerator::~DrmBufferGenerator() {
 134 }
 135
 136 scoped_refptr<ScanoutBuffer> DrmBufferGenerator::Create(
 137     const scoped_refptr<DrmDevice>& drm,
 138     gfx::BufferFormat format,
 139     const gfx::Size& size) {
 140   scoped_refptr<DrmBuffer> buffer(new DrmBuffer(drm));
 141   SkImageInfo info = SkImageInfo::MakeN32Premul(size.width(), size.height());
 142   if (!buffer->Initialize(info, true /* should_register_framebuffer */))
 143     return NULL;
 144
 145   return buffer;
 146 }
 147
 148 }  // namespace ui