1 /* This file is part of SDL_gles - SDL addon for OpenGL|ES
2 * Copyright (C) 2010 Javier S. Pedro
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 3 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA or see <http://www.gnu.org/licenses/>.
23 /* Set up for C function definitions, even when using C++ */
28 typedef enum SDL_GLES_Version
30 SDL_GLES_VERSION_NONE = 0,
31 SDL_GLES_VERSION_1_1 = 1,
32 SDL_GLES_VERSION_2_0 = 2
35 typedef enum SDL_GLES_Attr
37 SDL_GLES_BUFFER_SIZE = 0,
42 SDL_GLES_LUMINANCE_SIZE,
47 typedef struct SDL_GLES_Context
49 /* Opaque pointer to an EGLContext */
52 /** Invoke after SDL_Init.
53 @return 0 if SDL_gles was initialized correctly.
55 extern DECLSPEC int SDLCALL SDL_GLES_Init(SDL_GLES_Version version);
57 /** Invoke just before SDL_Quit.
59 extern DECLSPEC void SDLCALL SDL_GLES_Quit();
61 /** Call before calling GetProcAddress. Dynamically loads a GLES library.
62 * @param path full path to the library to load, or leave as NULL to load
63 * the default GL ES library (version as specified in SDL_GLES_Init()).
64 * @return 0 if everything went OK.
66 extern DECLSPEC int SDLCALL SDL_GLES_LoadLibrary(const char *path);
67 /** Returns the address of a symbol in the loaded GL ES library.
68 * @param name of the symbol to look up.
69 * @return address of the symbol or NULL.
71 extern DECLSPEC void* SDLCALL SDL_GLES_GetProcAddress(const char *proc);
73 /** Creates a new GL ES rendering context. This is where all your textures,
74 * etc. are stored. You need one for rendering; after creating it, make sure
75 * it is the current one calling SDL_GLES_MakeCurrent().
76 * @return the created context or NULL.
78 extern DECLSPEC SDL_GLES_Context* SDLCALL SDL_GLES_CreateContext(void);
79 /** Deletes an existing GL ES rendering context. This can delete the current
80 * context, but after that no context will be current.
81 * @param context context to delete
83 extern DECLSPEC void SDLCALL SDL_GLES_DeleteContext(SDL_GLES_Context *context);
85 /** Call after calling SDL_SetVideoMode() if you have an active context
86 * to refresh the surface parameters.
87 * @return 0 if everything went OK.
89 extern DECLSPEC int SDLCALL SDL_GLES_SetVideoMode(void);
90 /** Makes a context the current one. All GLES calls will use it from now on.
91 * @param context context to use
92 * @return 0 if everything went OK.
94 extern DECLSPEC int SDLCALL SDL_GLES_MakeCurrent(SDL_GLES_Context *context);
96 /** Equivalent to SDL_Flip(). Call when you're finished issuing GL calls
97 * and want to draw the color buffer contents to the window surface.
99 extern DECLSPEC void SDLCALL SDL_GLES_SwapBuffers(void);
101 /** Sets a specific context attribute before calling SDL_CreateContext().
104 * @return 0 if the attribute exists, -1 otherwise.
106 extern DECLSPEC int SDLCALL SDL_GLES_SetAttribute(SDL_GLES_Attr attr, int value);
108 /** Gets a context attribute from the current context, or from the wanted
109 * attribute set if no context is current.
111 * @param value pointer where the result will be stored.
112 * @return 0 if the attribute exists, -1 otherwise.
114 extern DECLSPEC int SDLCALL SDL_GLES_GetAttribute(SDL_GLES_Attr attr, int *value);
116 /* Ends C function definitions when using C++ */