SDL  2.0
SDL_egl_c.h
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1 /*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
4 
5  This software is provided 'as-is', without any express or implied
6  warranty. In no event will the authors be held liable for any damages
7  arising from the use of this software.
8 
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12 
13  1. The origin of this software must not be misrepresented; you must not
14  claim that you wrote the original software. If you use this software
15  in a product, an acknowledgment in the product documentation would be
16  appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18  misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20 */
21 #include "../SDL_internal.h"
22 
23 #ifndef SDL_egl_h_
24 #define SDL_egl_h_
25 
26 #if SDL_VIDEO_OPENGL_EGL
27 
28 #include "SDL_egl.h"
29 
30 #include "SDL_sysvideo.h"
31 
32 typedef struct SDL_EGL_VideoData
33 {
34  void *egl_dll_handle, *dll_handle;
35  EGLDisplay egl_display;
36  EGLConfig egl_config;
37  int egl_swapinterval;
38  int egl_surfacetype;
39  int egl_version_major, egl_version_minor;
40 
41  EGLDisplay(EGLAPIENTRY *eglGetDisplay) (NativeDisplayType display);
42  EGLDisplay(EGLAPIENTRY *eglGetPlatformDisplay) (EGLenum platform,
43  void *native_display,
44  const EGLint *attrib_list);
45  EGLDisplay(EGLAPIENTRY *eglGetPlatformDisplayEXT) (EGLenum platform,
46  void *native_display,
47  const EGLint *attrib_list);
48  EGLBoolean(EGLAPIENTRY *eglInitialize) (EGLDisplay dpy, EGLint * major,
49  EGLint * minor);
50  EGLBoolean(EGLAPIENTRY *eglTerminate) (EGLDisplay dpy);
51 
52  void *(EGLAPIENTRY *eglGetProcAddress) (const char * procName);
53 
54  EGLBoolean(EGLAPIENTRY *eglChooseConfig) (EGLDisplay dpy,
55  const EGLint * attrib_list,
56  EGLConfig * configs,
57  EGLint config_size, EGLint * num_config);
58 
59  EGLContext(EGLAPIENTRY *eglCreateContext) (EGLDisplay dpy,
60  EGLConfig config,
61  EGLContext share_list,
62  const EGLint * attrib_list);
63 
64  EGLBoolean(EGLAPIENTRY *eglDestroyContext) (EGLDisplay dpy, EGLContext ctx);
65 
66  EGLSurface(EGLAPIENTRY *eglCreatePbufferSurface)(EGLDisplay dpy, EGLConfig config,
67  EGLint const* attrib_list);
68 
69  EGLSurface(EGLAPIENTRY *eglCreateWindowSurface) (EGLDisplay dpy,
70  EGLConfig config,
71  NativeWindowType window,
72  const EGLint * attrib_list);
73  EGLBoolean(EGLAPIENTRY *eglDestroySurface) (EGLDisplay dpy, EGLSurface surface);
74 
75  EGLBoolean(EGLAPIENTRY *eglMakeCurrent) (EGLDisplay dpy, EGLSurface draw,
76  EGLSurface read, EGLContext ctx);
77 
78  EGLBoolean(EGLAPIENTRY *eglSwapBuffers) (EGLDisplay dpy, EGLSurface draw);
79 
80  EGLBoolean(EGLAPIENTRY *eglSwapInterval) (EGLDisplay dpy, EGLint interval);
81 
82  const char *(EGLAPIENTRY *eglQueryString) (EGLDisplay dpy, EGLint name);
83 
84  EGLBoolean(EGLAPIENTRY *eglGetConfigAttrib) (EGLDisplay dpy, EGLConfig config,
85  EGLint attribute, EGLint * value);
86 
87  EGLBoolean(EGLAPIENTRY *eglWaitNative) (EGLint engine);
88 
89  EGLBoolean(EGLAPIENTRY *eglWaitGL)(void);
90 
91  EGLBoolean(EGLAPIENTRY *eglBindAPI)(EGLenum);
92 
93  EGLint(EGLAPIENTRY *eglGetError)(void);
94 
95 } SDL_EGL_VideoData;
96 
97 /* OpenGLES functions */
98 extern int SDL_EGL_GetAttribute(_THIS, SDL_GLattr attrib, int *value);
99 /* SDL_EGL_LoadLibrary can get a display for a specific platform (EGL_PLATFORM_*)
100  * or, if 0 is passed, let the implementation decide.
101  */
102 extern int SDL_EGL_LoadLibrary(_THIS, const char *path, NativeDisplayType native_display, EGLenum platform);
103 extern void *SDL_EGL_GetProcAddress(_THIS, const char *proc);
104 extern void SDL_EGL_UnloadLibrary(_THIS);
105 extern int SDL_EGL_ChooseConfig(_THIS);
106 extern int SDL_EGL_SetSwapInterval(_THIS, int interval);
107 extern int SDL_EGL_GetSwapInterval(_THIS);
108 extern void SDL_EGL_DeleteContext(_THIS, SDL_GLContext context);
109 extern EGLSurface *SDL_EGL_CreateSurface(_THIS, NativeWindowType nw);
110 extern void SDL_EGL_DestroySurface(_THIS, EGLSurface egl_surface);
111 
112 /* These need to be wrapped to get the surface for the window by the platform GLES implementation */
113 extern SDL_GLContext SDL_EGL_CreateContext(_THIS, EGLSurface egl_surface);
114 extern int SDL_EGL_MakeCurrent(_THIS, EGLSurface egl_surface, SDL_GLContext context);
115 extern int SDL_EGL_SwapBuffers(_THIS, EGLSurface egl_surface);
116 
117 /* SDL Error-reporting */
118 extern int SDL_EGL_SetErrorEx(const char * message, const char * eglFunctionName, EGLint eglErrorCode);
119 #define SDL_EGL_SetError(message, eglFunctionName) SDL_EGL_SetErrorEx(message, eglFunctionName, _this->egl_data->eglGetError())
120 
121 /* A few of useful macros */
122 
123 #define SDL_EGL_SwapWindow_impl(BACKEND) int \
124 BACKEND ## _GLES_SwapWindow(_THIS, SDL_Window * window) \
125 {\
126  return SDL_EGL_SwapBuffers(_this, ((SDL_WindowData *) window->driverdata)->egl_surface);\
127 }
128 
129 #define SDL_EGL_MakeCurrent_impl(BACKEND) int \
130 BACKEND ## _GLES_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context) \
131 {\
132  if (window && context) { \
133  return SDL_EGL_MakeCurrent(_this, ((SDL_WindowData *) window->driverdata)->egl_surface, context); \
134  }\
135  else {\
136  return SDL_EGL_MakeCurrent(_this, NULL, NULL);\
137  }\
138 }
139 
140 #define SDL_EGL_CreateContext_impl(BACKEND) SDL_GLContext \
141 BACKEND ## _GLES_CreateContext(_THIS, SDL_Window * window) \
142 {\
143  return SDL_EGL_CreateContext(_this, ((SDL_WindowData *) window->driverdata)->egl_surface);\
144 }
145 
146 #endif /* SDL_VIDEO_OPENGL_EGL */
147 
148 #endif /* SDL_egl_h_ */
149 
150 /* vi: set ts=4 sw=4 expandtab: */