ozone/drm: Only reuse ScanoutBuffers with compatible modifiers

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/gbm_device.h"
 
 namespace ui {
 
 GbmBufferBase::GbmBufferBase(const scoped_refptr<GbmDevice>& drm,
                              gbm_bo* bo,
                              uint32_t format,
                              uint32_t flags,
                              uint64_t modifier,
                              uint32_t addfb_flags)
     : drm_(drm), bo_(bo) {
   if (flags & GBM_BO_USE_SCANOUT) {
     DCHECK(bo_);
     framebuffer_pixel_format_ = format;
     opaque_framebuffer_pixel_format_ = GetFourCCFormatForOpaqueFramebuffer(
         GetBufferFormatFromFourCCFormat(format));
+    format_modifier_ = modifier;
 
     uint32_t handles[4] = {0};
     uint32_t strides[4] = {0};
     uint32_t offsets[4] = {0};
     uint64_t modifiers[4] = {0};
 
     for (size_t i = 0; i < gbm_bo_get_num_planes(bo); ++i) {
       handles[i] = gbm_bo_get_plane_handle(bo, i).u32;
       strides[i] = gbm_bo_get_plane_stride(bo, i);
       offsets[i] = gbm_bo_get_plane_offset(bo, i);
@@ skipping 42 matching lines @@
 uint32_t GbmBufferBase::GetFramebufferPixelFormat() const {
   DCHECK(framebuffer_);
   return framebuffer_pixel_format_;
 }
 
 uint32_t GbmBufferBase::GetOpaqueFramebufferPixelFormat() const {
   DCHECK(framebuffer_);
   return opaque_framebuffer_pixel_format_;
 }
 
+uint64_t GbmBufferBase::GetFormatModifier() const {
+  DCHECK(framebuffer_);
+  return format_modifier_;
+}
+
 const DrmDevice* GbmBufferBase::GetDrmDevice() const {
   return drm_.get();
 }
 
 bool GbmBufferBase::RequiresGlFinish() const {
   return !drm_->is_primary_device();
 }
 
 }  // namespace ui