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

ui/ozone/platform/drm/gpu/gbm_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/ozone/platform/drm/gpu/gbm_buffer.h"
 
 #include <drm.h>
 #include <fcntl.h>
 #include <gbm.h>
 #include <xf86drm.h>
 
 #include "base/logging.h"
 #include "base/trace_event/trace_event.h"
 #include "ui/ozone/platform/drm/gpu/gbm_device.h"
 
 namespace ui {
 
 namespace {
 
 int GetGbmFormatFromBufferFormat(SurfaceFactoryOzone::BufferFormat fmt) {
   switch (fmt) {
-    case SurfaceFactoryOzone::RGBA_8888:
+    case SurfaceFactoryOzone::BGRA_8888:
       return GBM_BO_FORMAT_ARGB8888;
     case SurfaceFactoryOzone::RGBX_8888:
       return GBM_BO_FORMAT_XRGB8888;
     default:
       NOTREACHED();
       return 0;
   }
 }
 
 }  // namespace
 
-GbmBuffer::GbmBuffer(const scoped_refptr<GbmDevice>& gbm,
-                     gbm_bo* bo,
-                     bool scanout)
-    : GbmBufferBase(gbm, bo, scanout) {
+GbmBuffer::GbmBuffer(const scoped_refptr<GbmDevice>& gbm, gbm_bo* bo)
+    : GbmBufferBase(gbm, bo) {
 }
 
 GbmBuffer::~GbmBuffer() {
   if (bo())
     gbm_bo_destroy(bo());
 }
 
 // static
 scoped_refptr<GbmBuffer> GbmBuffer::CreateBuffer(
     const scoped_refptr<GbmDevice>& gbm,
     SurfaceFactoryOzone::BufferFormat format,
-    const gfx::Size& size,
-    bool scanout) {
+    const gfx::Size& size) {
   TRACE_EVENT2("drm", "GbmBuffer::CreateBuffer", "device",
                gbm->device_path().value(), "size", size.ToString());
-  unsigned flags = GBM_BO_USE_RENDERING;
-  if (scanout)
-    flags |= GBM_BO_USE_SCANOUT;
+  unsigned flags = GBM_BO_USE_RENDERING | GBM_BO_USE_SCANOUT;
   gbm_bo* bo = gbm_bo_create(gbm->device(), size.width(), size.height(),
                              GetGbmFormatFromBufferFormat(format), flags);
   if (!bo)
-    return NULL;
+    return nullptr;
 
-  scoped_refptr<GbmBuffer> buffer(new GbmBuffer(gbm, bo, scanout));
-  if (scanout && !buffer->GetFramebufferId())
-    return NULL;
+  scoped_refptr<GbmBuffer> buffer(new GbmBuffer(gbm, bo));
+  if (!buffer->GetFramebufferId())
+    return nullptr;
 
   return buffer;
 }
 
 GbmPixmap::GbmPixmap(const scoped_refptr<GbmBuffer>& buffer)
     : buffer_(buffer), dma_buf_(-1) {
 }
 
 bool GbmPixmap::Initialize() {
   // We want to use the GBM API because it's going to call into libdrm
@@ skipping 18 matching lines @@
 
 int GbmPixmap::GetDmaBufFd() {
   return dma_buf_;
 }
 
 int GbmPixmap::GetDmaBufPitch() {
   return gbm_bo_get_stride(buffer_->bo());
 }
 
 }  // namespace ui