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

ui/ozone/platform/drm/gbm_surface_factory.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/gbm_surface_factory.h"
 
 #include <gbm.h>
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "third_party/khronos/EGL/egl.h"
 #include "ui/ozone/common/egl_util.h"
 #include "ui/ozone/platform/drm/gpu/drm_device_manager.h"
 #include "ui/ozone/platform/drm/gpu/drm_window.h"
 #include "ui/ozone/platform/drm/gpu/gbm_buffer.h"
 #include "ui/ozone/platform/drm/gpu/gbm_device.h"
 #include "ui/ozone/platform/drm/gpu/gbm_surface.h"
 #include "ui/ozone/platform/drm/gpu/gbm_surfaceless.h"
 #include "ui/ozone/platform/drm/gpu/hardware_display_controller.h"
 #include "ui/ozone/platform/drm/gpu/screen_manager.h"
 #include "ui/ozone/public/native_pixmap.h"
 #include "ui/ozone/public/overlay_candidates_ozone.h"
 #include "ui/ozone/public/ozone_switches.h"
 #include "ui/ozone/public/surface_ozone_canvas.h"
 #include "ui/ozone/public/surface_ozone_egl.h"
 
+#if defined(ARCH_CPU_X86_FAMILY)
+#include "ui/ozone/platform/drm/gpu/gbm_map_pixmap_intel.h"
+#endif
+
 namespace ui {
 namespace {
 
 class SingleOverlay : public OverlayCandidatesOzone {
  public:
   SingleOverlay() {}
   ~SingleOverlay() override {}
 
   void CheckOverlaySupport(OverlaySurfaceCandidateList* candidates) override {
     if (candidates->size() == 2) {
@@ skipping 114 matching lines @@
     return nullptr;
 
   return make_scoped_ptr(new GbmSurfaceless(screen_manager_->GetWindow(widget),
                                             drm_device_manager_));
 }
 
 scoped_refptr<ui::NativePixmap> GbmSurfaceFactory::CreateNativePixmap(
     gfx::AcceleratedWidget widget,
     gfx::Size size,
     BufferFormat format,
-    BufferUsage usage) {
-  if (usage == MAP)
-    return nullptr;
-
+    BufferUsage usage,
+    gfx::GpuMemoryBufferHandle* handle) {
+  DCHECK(handle || usage == SCANOUT);
   scoped_refptr<GbmDevice> gbm = GetGbmDevice(widget);
   DCHECK(gbm);
 
-  scoped_refptr<GbmBuffer> buffer =
-      GbmBuffer::CreateBuffer(gbm, format, size, true);
+#if defined(ARCH_CPU_X86_FAMILY)
+  if (usage == MAP) {
+    scoped_refptr<GbmMapPixmapIntel> pixmap =
+        GbmMapPixmapIntel::CreatePixmap(gbm, format, size, handle);
+    if (!pixmap.get())
+      return nullptr;
+    return pixmap;
+  }
+#endif
+
+  scoped_refptr<GbmBuffer> buffer = GbmBuffer::CreateBuffer(gbm, format, size);
   if (!buffer.get())
     return nullptr;
 
   scoped_refptr<GbmPixmap> pixmap(new GbmPixmap(buffer));
   if (!pixmap->Initialize())
     return nullptr;
 
   return pixmap;
 }
 
@@ skipping 28 matching lines @@
   return true;
 }
 
 bool GbmSurfaceFactory::CanShowPrimaryPlaneAsOverlay() {
   return allow_surfaceless_;
 }
 
 bool GbmSurfaceFactory::CanCreateNativePixmap(BufferUsage usage) {
   switch (usage) {
     case MAP:
-      return false;
     case SCANOUT:
       return true;
   }
   NOTREACHED();
   return false;
 }
 
 scoped_refptr<GbmDevice> GbmSurfaceFactory::GetGbmDevice(
     gfx::AcceleratedWidget widget) {
   return static_cast<GbmDevice*>(
       drm_device_manager_->GetDrmDevice(widget).get());
 }
 
 }  // namespace ui