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/dri/dri_buffer.h"
6
7 #include "base/logging.h"
8 #include "ui/ozone/platform/dri/dri_wrapper.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.
GetColorDepth(SkColorType type)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
DriBuffer(DriWrapper * dri)37 DriBuffer::DriBuffer(DriWrapper* dri)
38 : dri_(dri), handle_(0), framebuffer_(0) {}
39
~DriBuffer()40 DriBuffer::~DriBuffer() {
41 if (!surface_)
42 return;
43
44 if (framebuffer_)
45 dri_->RemoveFramebuffer(framebuffer_);
46
47 SkImageInfo info;
48 void* pixels = const_cast<void*>(surface_->peekPixels(&info, NULL));
49 if (!pixels)
50 return;
51
52 dri_->DestroyDumbBuffer(info, handle_, stride_, pixels);
53 }
54
Initialize(const SkImageInfo & info)55 bool DriBuffer::Initialize(const SkImageInfo& info) {
56 void* pixels = NULL;
57 if (!dri_->CreateDumbBuffer(info, &handle_, &stride_, &pixels)) {
58 VLOG(2) << "Cannot create drm dumb buffer";
59 return false;
60 }
61
62 if (!dri_->AddFramebuffer(info.width(),
63 info.height(),
64 GetColorDepth(info.colorType()),
65 info.bytesPerPixel() << 3,
66 stride_,
67 handle_,
68 &framebuffer_)) {
69 VLOG(2) << "Failed to register framebuffer: " << strerror(errno);
70 return false;
71 }
72
73 surface_ = skia::AdoptRef(SkSurface::NewRasterDirect(info, pixels, stride_));
74 if (!surface_) {
75 VLOG(2) << "Cannot install Skia pixels for drm buffer";
76 return false;
77 }
78
79 return true;
80 }
81
GetCanvas() const82 SkCanvas* DriBuffer::GetCanvas() const {
83 return surface_->getCanvas();
84 }
85
GetFramebufferId() const86 uint32_t DriBuffer::GetFramebufferId() const {
87 return framebuffer_;
88 }
89
GetHandle() const90 uint32_t DriBuffer::GetHandle() const {
91 return handle_;
92 }
93
GetSize() const94 gfx::Size DriBuffer::GetSize() const {
95 return gfx::Size(surface_->width(), surface_->height());
96 }
97
DriBufferGenerator(DriWrapper * dri)98 DriBufferGenerator::DriBufferGenerator(DriWrapper* dri) : dri_(dri) {}
99
~DriBufferGenerator()100 DriBufferGenerator::~DriBufferGenerator() {}
101
Create(const gfx::Size & size)102 scoped_refptr<ScanoutBuffer> DriBufferGenerator::Create(const gfx::Size& size) {
103 scoped_refptr<DriBuffer> buffer(new DriBuffer(dri_));
104 SkImageInfo info = SkImageInfo::MakeN32Premul(size.width(), size.height());
105 if (!buffer->Initialize(info))
106 return NULL;
107
108 return buffer;
109 }
110
111 } // namespace ui
112