ui/gl/gl_image_linux_dma_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/gl/gl_image_linux_dma_buffer.h"
   6
   7 #include <unistd.h>
   8
   9 #define FOURCC(a, b, c, d)                                    \
  10   ((static_cast<uint32>(a)) | (static_cast<uint32>(b) << 8) | \
  11    (static_cast<uint32>(c) << 16) | (static_cast<uint32>(d) << 24))
  12
  13 #define DRM_FORMAT_ARGB8888 FOURCC('A', 'R', '2', '4')
  14 #define DRM_FORMAT_XRGB8888 FOURCC('X', 'R', '2', '4')
  15
  16 namespace gfx {
  17 namespace {
  18
  19 bool ValidInternalFormat(unsigned internalformat) {
  20   switch (internalformat) {
  21     case GL_RGB:
  22     case GL_BGRA_EXT:
  23       return true;
  24     default:
  25       return false;
  26   }
  27 }
  28
  29 bool ValidFormat(gfx::GpuMemoryBuffer::Format format) {
  30   switch (format) {
  31     case gfx::GpuMemoryBuffer::BGRA_8888:
  32     case gfx::GpuMemoryBuffer::RGBX_8888:
  33       return true;
  34     case gfx::GpuMemoryBuffer::ATC:
  35     case gfx::GpuMemoryBuffer::ATCIA:
  36     case gfx::GpuMemoryBuffer::DXT1:
  37     case gfx::GpuMemoryBuffer::DXT5:
  38     case gfx::GpuMemoryBuffer::ETC1:
  39     case gfx::GpuMemoryBuffer::R_8:
  40     case gfx::GpuMemoryBuffer::RGBA_8888:
  41     case gfx::GpuMemoryBuffer::YUV_420:
  42       return false;
  43   }
  44
  45   NOTREACHED();
  46   return false;
  47 }
  48
  49 EGLint FourCC(gfx::GpuMemoryBuffer::Format format) {
  50   switch (format) {
  51     case GpuMemoryBuffer::BGRA_8888:
  52       return DRM_FORMAT_ARGB8888;
  53     case GpuMemoryBuffer::RGBX_8888:
  54       return DRM_FORMAT_XRGB8888;
  55     case GpuMemoryBuffer::ATC:
  56     case GpuMemoryBuffer::ATCIA:
  57     case GpuMemoryBuffer::DXT1:
  58     case GpuMemoryBuffer::DXT5:
  59     case GpuMemoryBuffer::ETC1:
  60     case GpuMemoryBuffer::R_8:
  61     case GpuMemoryBuffer::RGBA_8888:
  62     case GpuMemoryBuffer::YUV_420:
  63       NOTREACHED();
  64       return 0;
  65   }
  66
  67   NOTREACHED();
  68   return 0;
  69 }
  70
  71 bool IsHandleValid(const base::FileDescriptor& handle) {
  72   return handle.fd >= 0;
  73 }
  74
  75 }  // namespace
  76
  77 GLImageLinuxDMABuffer::GLImageLinuxDMABuffer(const Size& size,
  78                                              unsigned internalformat)
  79     : GLImageEGL(size), internalformat_(internalformat) {
  80 }
  81
  82 GLImageLinuxDMABuffer::~GLImageLinuxDMABuffer() {
  83 }
  84
  85 bool GLImageLinuxDMABuffer::Initialize(const base::FileDescriptor& handle,
  86                                        GpuMemoryBuffer::Format format,
  87                                        int pitch) {
  88   if (!ValidInternalFormat(internalformat_)) {
  89     LOG(ERROR) << "Invalid internalformat: " << internalformat_;
  90     return false;
  91   }
  92
  93   if (!ValidFormat(format)) {
  94     LOG(ERROR) << "Invalid format: " << format;
  95     return false;
  96   }
  97
  98   if (!IsHandleValid(handle)) {
  99     LOG(ERROR) << "Invalid file descriptor: " << handle.fd;
 100     return false;
 101   }
 102
 103   // Note: If eglCreateImageKHR is successful for a EGL_LINUX_DMA_BUF_EXT
 104   // target, the EGL will take a reference to the dma_buf.
 105   EGLint attrs[] = {EGL_WIDTH,
 106                     size_.width(),
 107                     EGL_HEIGHT,
 108                     size_.height(),
 109                     EGL_LINUX_DRM_FOURCC_EXT,
 110                     FourCC(format),
 111                     EGL_DMA_BUF_PLANE0_FD_EXT,
 112                     handle.fd,
 113                     EGL_DMA_BUF_PLANE0_OFFSET_EXT,
 114                     0,
 115                     EGL_DMA_BUF_PLANE0_PITCH_EXT,
 116                     pitch,
 117                     EGL_NONE};
 118   return GLImageEGL::Initialize(
 119       EGL_LINUX_DMA_BUF_EXT, static_cast<EGLClientBuffer>(NULL), attrs);
 120 }
 121
 122 unsigned GLImageLinuxDMABuffer::GetInternalFormat() { return internalformat_; }
 123
 124 }  // namespace gfx