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| 1 // Copyright 2015 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 THIRD_PARTY_MOJO_SRC_MOJO_PUBLIC_PLATFORM_NATIVE_MGL_THUNKS_H_ | |
| 6 #define THIRD_PARTY_MOJO_SRC_MOJO_PUBLIC_PLATFORM_NATIVE_MGL_THUNKS_H_ | |
| 7 | |
| 8 #include <stddef.h> | |
| 9 | |
| 10 #include "third_party/mojo/src/mojo/public/c/gpu/MGL/mgl.h" | |
| 11 | |
| 12 // Structure used to bind the interface which manipulates MGL contexts to a | |
| 13 // DSO to theose of the embedder. | |
| 14 // | |
| 15 // This is the ABI between the embedder and the DSO. It can only have new | |
| 16 // functions added to the end. No other changes are supported. | |
| 17 #pragma pack(push, 8) | |
| 18 struct MGLThunks { | |
| 19 size_t size; // Should be set to sizeof(MGLThunks). | |
| 20 | |
| 21 MGLContext (*MGLCreateContext)(MGLOpenGLAPIVersion version, | |
| 22 MojoHandle command_buffer_handle, | |
| 23 MGLContext share_group, | |
| 24 MGLContextLostCallback lost_callback, | |
| 25 void* lost_callback_closure, | |
| 26 const struct MojoAsyncWaiter* async_waiter); | |
| 27 void (*MGLDestroyContext)(MGLContext context); | |
| 28 void (*MGLMakeCurrent)(MGLContext context); | |
| 29 MGLContext (*MGLGetCurrentContext)(void); | |
| 30 }; | |
| 31 #pragma pack(pop) | |
| 32 | |
| 33 // Intended to be called from the embedder. Returns an object initialized to | |
| 34 // contain pointers to each of the embedder's MGLThunks functions. | |
| 35 inline struct MGLThunks MojoMakeMGLThunks() { | |
| 36 struct MGLThunks mgl_thunks = { | |
| 37 sizeof(struct MGLThunks), | |
| 38 MGLCreateContext, | |
| 39 MGLDestroyContext, | |
| 40 MGLMakeCurrent, | |
| 41 MGLGetCurrentContext, | |
| 42 }; | |
| 43 | |
| 44 return mgl_thunks; | |
| 45 } | |
| 46 | |
| 47 // Use this type for the function found by dynamically discovering it in | |
| 48 // a DSO linked with mojo_system. For example: | |
| 49 // MojoSetMGLThunksFn mojo_set_gles2_thunks_fn = | |
| 50 // reinterpret_cast<MojoSetMGLThunksFn>( | |
| 51 // app_library.GetFunctionPointer("MojoSetMGLThunks")); | |
| 52 // The expected size of |mgl_thunks| is returned. | |
| 53 // The contents of |mgl_thunks| are copied. | |
| 54 typedef size_t (*MojoSetMGLThunksFn)(const struct MGLThunks* mgl_thunks); | |
| 55 | |
| 56 #endif // THIRD_PARTY_MOJO_SRC_MOJO_PUBLIC_PLATFORM_NATIVE_MGL_THUNKS_H_ | |
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