SDL  2.0
SDL_rpiopengles.c
Go to the documentation of this file.
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 #include "SDL_hints.h"
23 #include "SDL_log.h"
24 
25 #if SDL_VIDEO_DRIVER_RPI && SDL_VIDEO_OPENGL_EGL
26 
27 #include "SDL_rpivideo.h"
28 #include "SDL_rpiopengles.h"
29 
30 /* EGL implementation of SDL OpenGL support */
31 
32 void
33 RPI_GLES_DefaultProfileConfig(_THIS, int *mask, int *major, int *minor)
34 {
35  *mask = SDL_GL_CONTEXT_PROFILE_ES;
36  *major = 2;
37  *minor = 0;
38 }
39 
40 int
41 RPI_GLES_LoadLibrary(_THIS, const char *path) {
42  return SDL_EGL_LoadLibrary(_this, path, EGL_DEFAULT_DISPLAY, 0);
43 }
44 
45 int
46 RPI_GLES_SwapWindow(_THIS, SDL_Window * window) {
47  SDL_WindowData *wdata = ((SDL_WindowData *) window->driverdata);
48 
49  if (!(_this->egl_data->eglSwapBuffers(_this->egl_data->egl_display, wdata->egl_surface))) {
50  SDL_LogError(SDL_LOG_CATEGORY_VIDEO, "eglSwapBuffers failed.");
51  return 0;
52  }
53 
54  /* Wait immediately for vsync (as if we only had two buffers), for low input-lag scenarios.
55  * Run your SDL2 program with "SDL_RPI_DOUBLE_BUFFER=1 <program_name>" to enable this. */
56  if (wdata->double_buffer) {
57  SDL_LockMutex(wdata->vsync_cond_mutex);
58  SDL_CondWait(wdata->vsync_cond, wdata->vsync_cond_mutex);
59  SDL_UnlockMutex(wdata->vsync_cond_mutex);
60  }
61 
62  return 0;
63 }
64 
65 SDL_EGL_CreateContext_impl(RPI)
66 SDL_EGL_MakeCurrent_impl(RPI)
67 
68 #endif /* SDL_VIDEO_DRIVER_RPI && SDL_VIDEO_OPENGL_EGL */
69 
70 /* vi: set ts=4 sw=4 expandtab: */
71