NotForReview: Implement zero/one-copy texture for ozone freon using Intel DRM

ui/gl/gl_image_linux_dma_buffer.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gl/gl_image_linux_dma_buffer.h"
 
 #include <unistd.h>
 
 #define FOURCC(a, b, c, d)                                    \
   ((static_cast<uint32>(a)) | (static_cast<uint32>(b) << 8) | \
    (static_cast<uint32>(c) << 16) | (static_cast<uint32>(d) << 24))
 
 #define DRM_FORMAT_ARGB8888 FOURCC('A', 'R', '2', '4')
 #define DRM_FORMAT_XRGB8888 FOURCC('X', 'R', '2', '4')
 
 namespace gfx {
 namespace {
 
-bool ValidFormat(unsigned internalformat, gfx::GpuMemoryBuffer::Format format) {
+bool ValidInternalFormat(unsigned internalformat) {
   switch (internalformat) {
-    case GL_ATC_RGB_AMD:
-      return format == gfx::GpuMemoryBuffer::ATC;
-    case GL_ATC_RGBA_INTERPOLATED_ALPHA_AMD:
-      return format == gfx::GpuMemoryBuffer::ATCIA;
-    case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
-      return format == gfx::GpuMemoryBuffer::DXT1;
-    case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
-      return format == gfx::GpuMemoryBuffer::DXT5;
-    case GL_ETC1_RGB8_OES:
-      return format == gfx::GpuMemoryBuffer::ETC1;
     case GL_RGB:
-      switch (format) {
-        case gfx::GpuMemoryBuffer::RGBX_8888:
-          return true;
-        case gfx::GpuMemoryBuffer::ATC:
-        case gfx::GpuMemoryBuffer::ATCIA:
-        case gfx::GpuMemoryBuffer::DXT1:
-        case gfx::GpuMemoryBuffer::DXT5:
-        case gfx::GpuMemoryBuffer::ETC1:
-        case gfx::GpuMemoryBuffer::R_8:
-        case gfx::GpuMemoryBuffer::RGBA_8888:
-        case gfx::GpuMemoryBuffer::BGRA_8888:
-        case gfx::GpuMemoryBuffer::YUV_420:
-          return false;
-      }
-      NOTREACHED();
-      return false;
     case GL_RGBA:
-      switch (format) {
-        case gfx::GpuMemoryBuffer::BGRA_8888:
-          return true;
-        case gfx::GpuMemoryBuffer::ATC:
-        case gfx::GpuMemoryBuffer::ATCIA:
-        case gfx::GpuMemoryBuffer::DXT1:
-        case gfx::GpuMemoryBuffer::DXT5:
-        case gfx::GpuMemoryBuffer::ETC1:
-        case gfx::GpuMemoryBuffer::R_8:
-        case gfx::GpuMemoryBuffer::RGBX_8888:
-        case gfx::GpuMemoryBuffer::RGBA_8888:
-        case gfx::GpuMemoryBuffer::YUV_420:
-          return false;
-      }
-      NOTREACHED();
-      return false;
-    case GL_R8:
-      return false;
+    case GL_BGRA_EXT:
+      return true;
     default:
       return false;
   }
 }
 
+bool ValidFormat(gfx::GpuMemoryBuffer::Format format) {
+  switch (format) {
+    case gfx::GpuMemoryBuffer::RGBA_8888:
+    case gfx::GpuMemoryBuffer::BGRA_8888:
+    case gfx::GpuMemoryBuffer::RGBX_8888:
+      return true;
+    case gfx::GpuMemoryBuffer::ATC:
+    case gfx::GpuMemoryBuffer::ATCIA:
+    case gfx::GpuMemoryBuffer::DXT1:
+    case gfx::GpuMemoryBuffer::DXT5:
+    case gfx::GpuMemoryBuffer::ETC1:
+    case gfx::GpuMemoryBuffer::R_8:
+    case gfx::GpuMemoryBuffer::YUV_420:
+      return false;
+  }
+
+  NOTREACHED();
+  return false;
+}
+
 EGLint FourCC(gfx::GpuMemoryBuffer::Format format) {
   switch (format) {
     case gfx::GpuMemoryBuffer::BGRA_8888:
       return DRM_FORMAT_ARGB8888;
     case gfx::GpuMemoryBuffer::RGBX_8888:
       return DRM_FORMAT_XRGB8888;
     case gfx::GpuMemoryBuffer::ATC:
     case gfx::GpuMemoryBuffer::ATCIA:
     case gfx::GpuMemoryBuffer::DXT1:
     case gfx::GpuMemoryBuffer::DXT5:
@@ skipping 19 matching lines @@
                                              unsigned internalformat)
     : GLImageEGL(size), internalformat_(internalformat) {
 }
 
 GLImageLinuxDMABuffer::~GLImageLinuxDMABuffer() {
 }
 
 bool GLImageLinuxDMABuffer::Initialize(const base::FileDescriptor& handle,
                                        gfx::GpuMemoryBuffer::Format format,
                                        int pitch) {
-  if (!ValidFormat(internalformat_, format)) {
-    LOG(ERROR) << "Invalid format: " << internalformat_;
+  if (!ValidInternalFormat(internalformat_)) {
+    LOG(ERROR) << "Invalid internalformat: " << internalformat_;
     return false;
   }
 
+  if (!ValidFormat(format)) {
+    LOG(ERROR) << "Invalid format: " << format;
+    return false;
+  }
+
   if (!IsHandleValid(handle)) {
     LOG(ERROR) << "Invalid file descriptor: " << handle.fd;
     return false;
   }
 
   // Note: If eglCreateImageKHR is successful for a EGL_LINUX_DMA_BUF_EXT
   // target, the EGL will take a reference to the dma_buf.
   EGLint attrs[] = {EGL_WIDTH,
                     size_.width(),
                     EGL_HEIGHT,
                     size_.height(),
                     EGL_LINUX_DRM_FOURCC_EXT,
                     FourCC(format),
                     EGL_DMA_BUF_PLANE0_FD_EXT,
                     handle.fd,
                     EGL_DMA_BUF_PLANE0_OFFSET_EXT,
                     0,
                     EGL_DMA_BUF_PLANE0_PITCH_EXT,
                     pitch,
                     EGL_NONE};
-  return GLImageEGL::Initialize(
-      EGL_LINUX_DMA_BUF_EXT, static_cast<EGLClientBuffer>(NULL), attrs);
+  return GLImageEGL::Initialize(EGL_LINUX_DMA_BUF_EXT,
+                                static_cast<EGLClientBuffer>(nullptr), attrs);
 }
 
 }  // namespace gfx