SDL 2.0
SDL_DirectFB_opengl.c
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1/*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2019 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#if SDL_VIDEO_DRIVER_DIRECTFB
24
25#include "SDL_DirectFB_video.h"
26
27#if SDL_DIRECTFB_OPENGL
28
29#include "SDL_DirectFB_opengl.h"
30#include "SDL_DirectFB_window.h"
31
32#include <directfbgl.h>
33#include "SDL_loadso.h"
34#endif
35
36#if SDL_DIRECTFB_OPENGL
37
39{
40 int gl_active; /* to stop switching drivers while we have a valid context */
41 int initialized;
42 DirectFB_GLContext *firstgl; /* linked list */
43
44 /* OpenGL */
45 void (*glFinish) (void);
46 void (*glFlush) (void);
47};
48
49#define OPENGL_REQUIRS_DLOPEN
50#if defined(OPENGL_REQUIRS_DLOPEN) && defined(SDL_LOADSO_DLOPEN)
51#include <dlfcn.h>
52#define GL_LoadObject(X) dlopen(X, (RTLD_NOW|RTLD_GLOBAL))
53#define GL_LoadFunction dlsym
54#define GL_UnloadObject dlclose
55#else
56#define GL_LoadObject SDL_LoadObject
57#define GL_LoadFunction SDL_LoadFunction
58#define GL_UnloadObject SDL_UnloadObject
59#endif
60
61static void DirectFB_GL_UnloadLibrary(_THIS);
62
63int
64DirectFB_GL_Initialize(_THIS)
65{
66 if (_this->gl_data) {
67 return 0;
68 }
69
70 _this->gl_data =
71 (struct SDL_GLDriverData *) SDL_calloc(1,
72 sizeof(struct
74 if (!_this->gl_data) {
75 return SDL_OutOfMemory();
76 }
77 _this->gl_data->initialized = 0;
78
79 ++_this->gl_data->initialized;
80 _this->gl_data->firstgl = NULL;
81
82 if (DirectFB_GL_LoadLibrary(_this, NULL) < 0) {
83 return -1;
84 }
85
86 /* Initialize extensions */
87 /* FIXME needed?
88 * X11_GL_InitExtensions(_this);
89 */
90
91 return 0;
92}
93
94void
95DirectFB_GL_Shutdown(_THIS)
96{
97 if (!_this->gl_data || (--_this->gl_data->initialized > 0)) {
98 return;
99 }
100
101 DirectFB_GL_UnloadLibrary(_this);
102
104 _this->gl_data = NULL;
105}
106
107int
108DirectFB_GL_LoadLibrary(_THIS, const char *path)
109{
110 void *handle = NULL;
111
112 SDL_DFB_DEBUG("Loadlibrary : %s\n", path);
113
114 if (_this->gl_data->gl_active) {
115 return SDL_SetError("OpenGL context already created");
116 }
117
118
119 if (path == NULL) {
120 path = SDL_getenv("SDL_OPENGL_LIBRARY");
121 if (path == NULL) {
122 path = "libGL.so.1";
123 }
124 }
125
126 handle = GL_LoadObject(path);
127 if (handle == NULL) {
128 SDL_DFB_ERR("Library not found: %s\n", path);
129 /* SDL_LoadObject() will call SDL_SetError() for us. */
130 return -1;
131 }
132
133 SDL_DFB_DEBUG("Loaded library: %s\n", path);
134
136 if (path) {
139 } else {
140 *_this->gl_config.driver_path = '\0';
141 }
142
143 _this->gl_data->glFinish = DirectFB_GL_GetProcAddress(_this, "glFinish");
144 _this->gl_data->glFlush = DirectFB_GL_GetProcAddress(_this, "glFlush");
145
146 return 0;
147}
148
149static void
150DirectFB_GL_UnloadLibrary(_THIS)
151{
152 #if 0
153 int ret = GL_UnloadObject(_this->gl_config.dll_handle);
154 if (ret)
155 SDL_DFB_ERR("Error #%d trying to unload library.\n", ret);
157#endif
158 /* Free OpenGL memory */
160 _this->gl_data = NULL;
161}
162
163void *
164DirectFB_GL_GetProcAddress(_THIS, const char *proc)
165{
166 void *handle;
167
169 return GL_LoadFunction(handle, proc);
170}
171
173DirectFB_GL_CreateContext(_THIS, SDL_Window * window)
174{
176 DirectFB_GLContext *context;
177
178 SDL_DFB_ALLOC_CLEAR(context, sizeof(DirectFB_GLContext));
179
180 SDL_DFB_CHECKERR(windata->surface->GetGL(windata->surface,
181 &context->context));
182
183 if (!context->context)
184 return NULL;
185
186 context->is_locked = 0;
187 context->sdl_window = window;
188
189 context->next = _this->gl_data->firstgl;
190 _this->gl_data->firstgl = context;
191
192 SDL_DFB_CHECK(context->context->Unlock(context->context));
193
194 if (DirectFB_GL_MakeCurrent(_this, window, context) < 0) {
195 DirectFB_GL_DeleteContext(_this, context);
196 return NULL;
197 }
198
199 return context;
200
201 error:
202 return NULL;
203}
204
205int
206DirectFB_GL_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context)
207{
208 DirectFB_GLContext *ctx = (DirectFB_GLContext *) context;
209 DirectFB_GLContext *p;
210
211 for (p = _this->gl_data->firstgl; p; p = p->next)
212 {
213 if (p->is_locked) {
214 SDL_DFB_CHECKERR(p->context->Unlock(p->context));
215 p->is_locked = 0;
216 }
217
218 }
219
220 if (ctx != NULL) {
221 SDL_DFB_CHECKERR(ctx->context->Lock(ctx->context));
222 ctx->is_locked = 1;
223 }
224
225 return 0;
226 error:
227 return -1;
228}
229
230int
231DirectFB_GL_SetSwapInterval(_THIS, int interval)
232{
233 return SDL_Unsupported();
234}
235
236int
237DirectFB_GL_GetSwapInterval(_THIS)
238{
239 return 0;
240}
241
242int
243DirectFB_GL_SwapWindow(_THIS, SDL_Window * window)
244{
246 DirectFB_GLContext *p;
247
248#if 0
249 if (devdata->glFinish)
250 devdata->glFinish();
251 else if (devdata->glFlush)
252 devdata->glFlush();
253#endif
254
255 for (p = _this->gl_data->firstgl; p != NULL; p = p->next)
256 if (p->sdl_window == window && p->is_locked)
257 {
258 SDL_DFB_CHECKERR(p->context->Unlock(p->context));
259 p->is_locked = 0;
260 }
261
262 SDL_DFB_CHECKERR(windata->window_surface->Flip(windata->window_surface,NULL, DSFLIP_PIPELINE |DSFLIP_BLIT | DSFLIP_ONSYNC ));
263 return 0;
264 error:
265 return -1;
266}
267
268void
269DirectFB_GL_DeleteContext(_THIS, SDL_GLContext context)
270{
271 DirectFB_GLContext *ctx = (DirectFB_GLContext *) context;
272 DirectFB_GLContext *p;
273
274 if (ctx->is_locked)
275 SDL_DFB_CHECK(ctx->context->Unlock(ctx->context));
276 SDL_DFB_RELEASE(ctx->context);
277
278 for (p = _this->gl_data->firstgl; p && p->next != ctx; p = p->next)
279 ;
280 if (p)
281 p->next = ctx->next;
282 else
283 _this->gl_data->firstgl = ctx->next;
284
286}
287
288void
289DirectFB_GL_FreeWindowContexts(_THIS, SDL_Window * window)
290{
291 DirectFB_GLContext *p;
292
293 for (p = _this->gl_data->firstgl; p != NULL; p = p->next)
294 if (p->sdl_window == window)
295 {
296 if (p->is_locked)
297 SDL_DFB_CHECK(p->context->Unlock(p->context));
298 SDL_DFB_RELEASE(p->context);
299 }
300}
301
302void
303DirectFB_GL_ReAllocWindowContexts(_THIS, SDL_Window * window)
304{
305 DirectFB_GLContext *p;
306
307 for (p = _this->gl_data->firstgl; p != NULL; p = p->next)
308 if (p->sdl_window == window)
309 {
311 SDL_DFB_CHECK(windata->surface->GetGL(windata->surface,
312 &p->context));
313 if (p->is_locked)
314 SDL_DFB_CHECK(p->context->Lock(p->context));
315 }
316}
317
318void
319DirectFB_GL_DestroyWindowContexts(_THIS, SDL_Window * window)
320{
321 DirectFB_GLContext *p;
322
323 for (p = _this->gl_data->firstgl; p != NULL; p = p->next)
324 if (p->sdl_window == window)
325 DirectFB_GL_DeleteContext(_this, p);
326}
327
328#endif
329
330#endif /* SDL_VIDEO_DRIVER_DIRECTFB */
331
332/* vi: set ts=4 sw=4 expandtab: */
#define SDL_DFB_DEBUG(x...)
#define SDL_DFB_ERR(x...)
#define SDL_DFB_CHECKERR(x...)
#define SDL_DFB_FREE(x)
#define SDL_DFB_ALLOC_CLEAR(r, s)
#define SDL_DFB_CHECK(x...)
#define SDL_DFB_RELEASE(x)
#define SDL_DFB_WINDOWDATA(win)
#define _THIS
#define SDL_SetError
#define SDL_getenv
#define SDL_strlcpy
#define SDL_free
#define SDL_calloc
SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char const char SDL_SCANF_FORMAT_STRING const char return SDL_ThreadFunction const char void return Uint32 return Uint32 void
#define SDL_OutOfMemory()
Definition: SDL_error.h:52
#define SDL_Unsupported()
Definition: SDL_error.h:53
GLAPI void GLAPIENTRY glFinish(void)
GLAPI void GLAPIENTRY glFlush(void)
GLfloat GLfloat p
GLsizei const GLchar *const * path
#define SDL_arraysize(array)
Definition: SDL_stdinc.h:115
static SDL_VideoDevice * _this
Definition: SDL_video.c:118
void * SDL_GLContext
An opaque handle to an OpenGL context.
Definition: SDL_video.h:193
#define NULL
Definition: begin_code.h:167
EGLImageKHR EGLint EGLint * handle
Definition: eglext.h:937
EGLContext ctx
Definition: eglext.h:208
EGLSurface EGLNativeWindowType * window
Definition: eglext.h:1025
char driver_path[256]
Definition: SDL_sysvideo.h:354
struct SDL_VideoDevice::@262 gl_config
struct SDL_GLDriverData * gl_data
Definition: SDL_sysvideo.h:382
The type used to identify a window.
Definition: SDL_sysvideo.h:74
static screen_context_t context
Definition: video.c:25