ozone: support gfx::BufferFormat::RGBX_8888 as a native pixmap format.

ui/ozone/platform/drm/gpu/gbm_buffer_base.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_base.h"
 
 #include <gbm.h>
 
 #include "base/logging.h"
+#include "ui/ozone/platform/drm/common/drm_util.h"
 #include "ui/ozone/platform/drm/gpu/drm_device.h"
 
 namespace ui {
 
 GbmBufferBase::GbmBufferBase(const scoped_refptr<DrmDevice>& drm,
                              gbm_bo* bo,
-                             bool scanout)
+                             gfx::BufferFormat format,
+                             gfx::BufferUsage usage)
     : drm_(drm), bo_(bo) {
-  if (scanout) {
-    fb_pixel_format_ = gbm_bo_get_format(bo);
-    if (fb_pixel_format_ == GBM_FORMAT_ARGB8888)
-      fb_pixel_format_ = GBM_FORMAT_XRGB8888;
-
-    // For now, we only support XRGB and UYVY format.
-    DCHECK(fb_pixel_format_ == GBM_FORMAT_XRGB8888 ||
-           fb_pixel_format_ == GBM_FORMAT_UYVY);
+  if (usage == gfx::BufferUsage::SCANOUT) {
+    framebuffer_pixel_format_ = GetFourCCFormatForFramebuffer(format);
 
     uint32_t handles[4] = {0};
     handles[0] = gbm_bo_get_handle(bo).u32;
     uint32_t strides[4] = {0};
     strides[0] = gbm_bo_get_stride(bo);
     uint32_t offsets[4] = {0};
 
     if (!drm_->AddFramebuffer2(gbm_bo_get_width(bo), gbm_bo_get_height(bo),
-                               fb_pixel_format_, handles, strides, offsets,
-                               &framebuffer_, 0)) {
+                               framebuffer_pixel_format_, handles, strides,
+                               offsets, &framebuffer_, 0)) {
       PLOG(ERROR) << "Failed to register buffer";
       return;
     }
   }
 }
 
 GbmBufferBase::~GbmBufferBase() {
   if (framebuffer_)
     drm_->RemoveFramebuffer(framebuffer_);
 }
 
 uint32_t GbmBufferBase::GetFramebufferId() const {
   return framebuffer_;
 }
 
 uint32_t GbmBufferBase::GetHandle() const {
   return gbm_bo_get_handle(bo_).u32;
 }
 
 gfx::Size GbmBufferBase::GetSize() const {
   return gfx::Size(gbm_bo_get_width(bo_), gbm_bo_get_height(bo_));
 }
 
 uint32_t GbmBufferBase::GetFramebufferPixelFormat() const {
-  return fb_pixel_format_;
+  DCHECK(framebuffer_);
+  return framebuffer_pixel_format_;
 }
 
 bool GbmBufferBase::RequiresGlFinish() const {
   return !drm_->is_primary_device();
 }
 
 }  // namespace ui