1 // Copyright 2016 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef GPU_IPC_COMMON_SURFACE_HANDLE_H_ 6 #define GPU_IPC_COMMON_SURFACE_HANDLE_H_ 7 8 #include <stdint.h> 9 10 #include "build/build_config.h" 11 12 #if (defined(OS_MACOSX) || defined(OS_WIN) || defined(USE_X11) || \ 13 defined(USE_OZONE)) && \ 14 !defined(OS_NACL) 15 #include "ui/gfx/native_widget_types.h" 16 #define GPU_SURFACE_HANDLE_IS_ACCELERATED_WINDOW 17 #endif 18 19 namespace gpu { 20 21 // SurfaceHandle is the native type used to reference a native surface in the 22 // GPU process so that we can create "view" contexts on it. 23 24 // On Windows, Mac, Linux and Chrome OS, we can use a AcceleratedWidget across 25 // processes, so SurfaceHandle is exactly that. 26 // On Android, there is no type we can directly access across processes, so we 27 // go through the GpuSurfaceTracker, and SurfaceHandle is a (scalar) handle 28 // generated by that. 29 // On NaCl, we don't have native surfaces per se, but we need SurfaceHandle to 30 // be defined, because some APIs that use it are referenced there. 31 // 32 // TODO(fuchsia): Figure out the right approach for Fuchsia. 33 #if defined(GPU_SURFACE_HANDLE_IS_ACCELERATED_WINDOW) 34 using SurfaceHandle = gfx::AcceleratedWidget; 35 constexpr SurfaceHandle kNullSurfaceHandle = gfx::kNullAcceleratedWidget; 36 #elif defined(OS_ANDROID) || defined(OS_NACL) || defined(OS_FUCHSIA) 37 using SurfaceHandle = int32_t; 38 constexpr SurfaceHandle kNullSurfaceHandle = 0; 39 #else 40 #error Platform not supported. 41 #endif 42 43 } // namespace gpu 44 45 #endif // GPU_IPC_COMMON_SURFACE_HANDLE_H_ 46