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

ui/ozone/platform/drm/common/native_pixmap_manager_gbm.cc

Index: ui/ozone/platform/drm/common/native_pixmap_manager_gbm.cc
diff --git a/ui/ozone/platform/drm/common/native_pixmap_manager_gbm.cc b/ui/ozone/platform/drm/common/native_pixmap_manager_gbm.cc
index 4b0c4e6a25a604f3ae75ce8c86e339440d8a6616..93a7f1071044af4d9e790e5a4ee12fb822eb20b4 100644
--- a/ui/ozone/platform/drm/common/native_pixmap_manager_gbm.cc
+++ b/ui/ozone/platform/drm/common/native_pixmap_manager_gbm.cc
@@ -7,6 +7,10 @@
 #include "base/file_descriptor_posix.h"
 #include "ui/ozone/platform/drm/gpu/vgem_pixmap.h"
 
+#include "base/command_line.h"
+#include "ui/ozone/platform/drm/gpu/intel_drm_pixmap.h"
+#include "ui/ozone/public/ozone_switches.h"
+
 namespace ui {
 
 namespace {
@@ -60,6 +64,13 @@ scoped_refptr<NativePixmap> NativePixmapManagerGbm::CreateFromFileDescriptor(
     gfx::Size size,
     SurfaceFactoryOzone::BufferFormat format,
     SurfaceFactoryOzone::BufferUsage usage) {
+  bool enable_intel_drm = base::CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kOzoneUseIntelDrm);
+  if (enable_intel_drm && usage == SurfaceFactoryOzone::MAP) {
+    return IntelDrmPixmap::CreateFromHandle(
+        base::FileDescriptor(vgem_fd_.get(), false), handle, format, size);
+  }
+
   scoped_refptr<VgemPixmap> pixmap(new VgemPixmap(
       handle, base::FileDescriptor(vgem_fd_.get(), false), size, format,
       NativePixmapBufferUsageFromSurfaceFactoryOzone(usage)));