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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 MOJO_PUBLIC_PLATFORM_NATIVE_MGL_ONSCREEN_THUNKS_H_ | |
6 #define MOJO_PUBLIC_PLATFORM_NATIVE_MGL_ONSCREEN_THUNKS_H_ | |
7 | |
8 #include <MGL/mgl_onscreen.h> | |
9 #include <stddef.h> | |
10 | |
11 // Structure used to bind the interface which manipulates MGL contexts to a | |
12 // DSO to theose of the embedder. | |
13 // | |
14 // This is the ABI between the embedder and the DSO. It can only have new | |
15 // functions added to the end. No other changes are supported. | |
16 #pragma pack(push, 8) | |
17 struct MGLOnscreenThunks { | |
18 size_t size; // Should be set to sizeof(MojoMGLOnscreenThunks). | |
19 | |
20 void (*MGLResizeSurface)(uint32_t width, uint32_t height); | |
21 void (*MGLSwapBuffers)(void); | |
22 }; | |
23 #pragma pack(pop) | |
24 | |
25 // Intended to be called from the embedder. Returns an object initialized to | |
26 // contain pointers to each of the embedder's MGLOnscreenThunks functions. | |
27 inline struct MGLOnscreenThunks MojoMakeMGLOnscreenThunks() { | |
28 struct MGLOnscreenThunks mgl_onscreen_thunks = { | |
29 sizeof(struct MGLOnscreenThunks), MGLResizeSurface, MGLSwapBuffers, | |
30 }; | |
31 | |
32 return mgl_onscreen_thunks; | |
33 } | |
34 | |
35 // Use this type for the function found by dynamically discovering it in | |
36 // a DSO linked with mojo_system. For example: | |
37 // MojoSetMGLOnscreenThunksFn mojo_set_gles2_thunks_fn = | |
38 // reinterpret_cast<MojoSetMGLOnscreenThunksFn>( | |
39 // app_library.GetFunctionPointer("MojoSetMGLOnscreenThunks")); | |
40 // The expected size of |mgl_thunks| is returned. | |
41 // The contents of |mgl_thunks| are copied. | |
42 typedef size_t (*MojoSetMGLOnscreenThunksFn)( | |
43 const struct MGLOnscreenThunks* mgl_thunks); | |
44 | |
45 #endif // MOJO_PUBLIC_PLATFORM_NATIVE_MGL_ONSCREEN_THUNKS_H_ | |
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