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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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