Implement DRM Native Pixmap using prime buffer

ui/ozone/platform/drm/client_native_pixmap_factory_gbm.cc

 // Copyright 2015 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/client_native_pixmap_factory_gbm.h"
 
 #include <utility>
 
 #include "base/macros.h"
 #include "ui/gfx/native_pixmap_handle_ozone.h"
+#include "ui/ozone/platform/drm/common/client_native_pixmap_dmabuf.h"
 #include "ui/ozone/public/client_native_pixmap_factory.h"
 
-#if defined(USE_VGEM_MAP)
-#include "ui/ozone/platform/drm/common/client_native_pixmap_vgem.h"
-#endif
-
 namespace ui {
 
 namespace {
 
 class ClientNativePixmapGbm : public ClientNativePixmap {
  public:
   ClientNativePixmapGbm() {}
   ~ClientNativePixmapGbm() override {}
 
   void* Map() override {
     NOTREACHED();
     return nullptr;
   }
   void Unmap() override { NOTREACHED(); }
   void GetStride(int* stride) const override { NOTREACHED(); }
 };
 
 }  // namespace
 
 class ClientNativePixmapFactoryGbm : public ClientNativePixmapFactory {
  public:
   ClientNativePixmapFactoryGbm() {}
   ~ClientNativePixmapFactoryGbm() override {}
 
   // ClientNativePixmapFactory:
-  void Initialize(base::ScopedFD device_fd) override {
-#if defined(USE_VGEM_MAP)
-    // It's called in IO thread. We rely on clients for thread-safety.
-    // Switching to an IPC message filter ensures thread-safety.
-    DCHECK_LT(vgem_fd_.get(), 0);
-    vgem_fd_ = std::move(device_fd);
-#endif
-  }
   bool IsConfigurationSupported(gfx::BufferFormat format,
                                 gfx::BufferUsage usage) const override {
     switch (usage) {
       case gfx::BufferUsage::GPU_READ:
       case gfx::BufferUsage::SCANOUT:
         return format == gfx::BufferFormat::RGBA_8888 ||
                format == gfx::BufferFormat::RGBX_8888 ||
                format == gfx::BufferFormat::BGRA_8888 ||
                format == gfx::BufferFormat::BGRX_8888;
       case gfx::BufferUsage::GPU_READ_CPU_READ_WRITE:
       case gfx::BufferUsage::GPU_READ_CPU_READ_WRITE_PERSISTENT: {
-#if defined(USE_VGEM_MAP)
-        return vgem_fd_.is_valid() && format == gfx::BufferFormat::BGRA_8888;
-#else
-        return false;
-#endif
+        return format == gfx::BufferFormat::BGRA_8888;
       }
     }
     NOTREACHED();
     return false;
   }
   scoped_ptr<ClientNativePixmap> ImportFromHandle(
       const gfx::NativePixmapHandle& handle,
       const gfx::Size& size,
       gfx::BufferUsage usage) override {
     base::ScopedFD scoped_fd(handle.fd.fd);
 
     switch (usage) {
       case gfx::BufferUsage::GPU_READ_CPU_READ_WRITE:
       case gfx::BufferUsage::GPU_READ_CPU_READ_WRITE_PERSISTENT:
-#if defined(USE_VGEM_MAP)
-        // A valid |vgem_fd_| is required to acquire a VGEM bo. |vgem_fd_| is
-        // set before a widget is created.
-        DCHECK_GE(vgem_fd_.get(), 0);
-        return ClientNativePixmapVgem::ImportFromDmabuf(
-            vgem_fd_.get(), scoped_fd.get(), size, handle.stride);
-#endif
-        NOTREACHED();
-        return nullptr;
+        return ClientNativePixmapDmaBuf::ImportFromDmabuf(
+            scoped_fd.get(), size, handle.stride);
       case gfx::BufferUsage::GPU_READ:
       case gfx::BufferUsage::SCANOUT:
         return make_scoped_ptr<ClientNativePixmapGbm>(
             new ClientNativePixmapGbm);
     }
     NOTREACHED();
     return nullptr;
   }
 
- private:
-#if defined(USE_VGEM_MAP)
-  base::ScopedFD vgem_fd_;
-#endif
-
   DISALLOW_COPY_AND_ASSIGN(ClientNativePixmapFactoryGbm);
 };
 
 ClientNativePixmapFactory* CreateClientNativePixmapFactoryGbm() {
   return new ClientNativePixmapFactoryGbm();
 }
 
 }  // namespace ui