int
X11_GL_LoadLibrary(_THIS, const char *path)
{
Display *display;
void *handle;
if (_this->gl_data) {
return SDL_SetError("OpenGL context already created");
}
/* Load the OpenGL library */
if (path == NULL) {
path = SDL_getenv("SDL_OPENGL_LIBRARY");
}
if (path == NULL) {
path = DEFAULT_OPENGL;
}
_this->gl_config.dll_handle = GL_LoadObject(path);
if (!_this->gl_config.dll_handle) {
#if defined(OPENGL_REQUIRES_DLOPEN) && defined(SDL_LOADSO_DLOPEN)
SDL_SetError("Failed loading %s: %s", path, dlerror());
#endif
return -1;
}
SDL_strlcpy(_this->gl_config.driver_path, path,
SDL_arraysize(_this->gl_config.driver_path));
/* Allocate OpenGL memory */
_this->gl_data =
(struct SDL_GLDriverData *) SDL_calloc(1,
sizeof(struct
SDL_GLDriverData));
if (!_this->gl_data) {
return SDL_OutOfMemory();
}
/* Load function pointers */
handle = _this->gl_config.dll_handle;
_this->gl_data->glXQueryExtension =
(Bool (*)(Display *, int *, int *))
GL_LoadFunction(handle, "glXQueryExtension");
_this->gl_data->glXGetProcAddress =
(void *(*)(const GLubyte *))
GL_LoadFunction(handle, "glXGetProcAddressARB");
_this->gl_data->glXChooseVisual =
(XVisualInfo * (*)(Display *, int, int *))
X11_GL_GetProcAddress(_this, "glXChooseVisual");
_this->gl_data->glXCreateContext =
(GLXContext(*)(Display *, XVisualInfo *, GLXContext, int))
X11_GL_GetProcAddress(_this, "glXCreateContext");
_this->gl_data->glXDestroyContext =
(void (*)(Display *, GLXContext))
X11_GL_GetProcAddress(_this, "glXDestroyContext");
_this->gl_data->glXMakeCurrent =
(int (*)(Display *, GLXDrawable, GLXContext))
X11_GL_GetProcAddress(_this, "glXMakeCurrent");
_this->gl_data->glXSwapBuffers =
(void (*)(Display *, GLXDrawable))
X11_GL_GetProcAddress(_this, "glXSwapBuffers");
_this->gl_data->glXQueryDrawable =
(void (*)(Display*,GLXDrawable,int,unsigned int*))
X11_GL_GetProcAddress(_this, "glXQueryDrawable");
if (!_this->gl_data->glXQueryExtension ||
!_this->gl_data->glXChooseVisual ||
!_this->gl_data->glXCreateContext ||
!_this->gl_data->glXDestroyContext ||
!_this->gl_data->glXMakeCurrent ||
!_this->gl_data->glXSwapBuffers) {
return SDL_SetError("Could not retrieve OpenGL functions");
}
display = ((SDL_VideoData *) _this->driverdata)->display;
if (!_this->gl_data->glXQueryExtension(display, &_this->gl_data->errorBase, &_this->gl_data->eventBase)) {
return SDL_SetError("GLX is not supported");
}
/* Initialize extensions */
X11_GL_InitExtensions(_this);
/* If SDL_GL_CONTEXT_EGL has been changed to 1, and there's
* no GLX_EXT_create_context_es2_profile extension switch over to X11_GLES functions */
if (_this->gl_config.use_egl == 1) {
if (_this->gl_data->HAS_GLX_EXT_create_context_es2_profile) {
/* We cheat a little bit here by using GLX instead of EGL
* to improve our chances of getting hardware acceleration */
_this->gl_config.use_egl = 0;
_this->gl_config.profile_mask = SDL_GL_CONTEXT_PROFILE_ES;
} else {
#if SDL_VIDEO_OPENGL_EGL
X11_GL_UnloadLibrary(_this);
/* Better avoid conflicts! */
if (_this->gl_config.dll_handle != NULL ) {
GL_UnloadObject(_this->gl_config.dll_handle);
_this->gl_config.dll_handle = NULL;
}
_this->GL_LoadLibrary = X11_GLES_LoadLibrary;
_this->GL_GetProcAddress = X11_GLES_GetProcAddress;
_this->GL_UnloadLibrary = X11_GLES_UnloadLibrary;
_this->GL_CreateContext = X11_GLES_CreateContext;
_this->GL_MakeCurrent = X11_GLES_MakeCurrent;
_this->GL_SetSwapInterval = X11_GLES_SetSwapInterval;
_this->GL_GetSwapInterval = X11_GLES_GetSwapInterval;
_this->GL_SwapWindow = X11_GLES_SwapWindow;
_this->GL_DeleteContext = X11_GLES_DeleteContext;
return X11_GLES_LoadLibrary(_this, NULL);
#else
return SDL_SetError("SDL not configured with EGL support");
#endif
}
}
return 0;
}
XVisualInfo *
X11_GLES_GetVisual(_THIS, Display * display, int screen)
{
/* 64 seems nice. */
EGLint attribs[64];
EGLint found_configs = 0;
VisualID visual_id;
int i;
/* load the gl driver from a default path */
if (!_this->gl_config.driver_loaded) {
/* no driver has been loaded, use default (ourselves) */
if (X11_GLES_LoadLibrary(_this, NULL) < 0) {
return NULL;
}
}
i = 0;
attribs[i++] = EGL_RED_SIZE;
attribs[i++] = _this->gl_config.red_size;
attribs[i++] = EGL_GREEN_SIZE;
attribs[i++] = _this->gl_config.green_size;
attribs[i++] = EGL_BLUE_SIZE;
attribs[i++] = _this->gl_config.blue_size;
if (_this->gl_config.alpha_size) {
attribs[i++] = EGL_ALPHA_SIZE;
attribs[i++] = _this->gl_config.alpha_size;
}
if (_this->gl_config.buffer_size) {
attribs[i++] = EGL_BUFFER_SIZE;
attribs[i++] = _this->gl_config.buffer_size;
}
attribs[i++] = EGL_DEPTH_SIZE;
attribs[i++] = _this->gl_config.depth_size;
if (_this->gl_config.stencil_size) {
attribs[i++] = EGL_STENCIL_SIZE;
attribs[i++] = _this->gl_config.stencil_size;
}
if (_this->gl_config.multisamplebuffers) {
attribs[i++] = EGL_SAMPLE_BUFFERS;
attribs[i++] = _this->gl_config.multisamplebuffers;
}
if (_this->gl_config.multisamplesamples) {
attribs[i++] = EGL_SAMPLES;
attribs[i++] = _this->gl_config.multisamplesamples;
}
attribs[i++] = EGL_NONE;
if (_this->gles_data->eglChooseConfig(_this->gles_data->egl_display,
attribs,
&_this->gles_data->egl_config, 1,
&found_configs) == EGL_FALSE ||
found_configs == 0) {
SDL_SetError("Couldn't find matching EGL config");
return NULL;
}
if (_this->gles_data->eglGetConfigAttrib(_this->gles_data->egl_display,
_this->gles_data->egl_config,
EGL_NATIVE_VISUAL_ID,
(EGLint *) & visual_id) ==
EGL_FALSE || !visual_id) {
/* Use the default visual when all else fails */
XVisualInfo vi_in;
int out_count;
vi_in.screen = screen;
_this->gles_data->egl_visualinfo = XGetVisualInfo(display,
VisualScreenMask,
&vi_in, &out_count);
} else {
XVisualInfo vi_in;
int out_count;
vi_in.screen = screen;
vi_in.visualid = visual_id;
_this->gles_data->egl_visualinfo = XGetVisualInfo(display,
VisualScreenMask |
VisualIDMask,
&vi_in, &out_count);
}
return _this->gles_data->egl_visualinfo;
}
int
X11_GL_LoadLibrary(_THIS, const char *path)
{
void *handle;
if (_this->gl_data) {
return SDL_SetError("OpenGL context already created");
}
/* If SDL_GL_CONTEXT_EGL has been changed to 1, switch over to X11_GLES functions */
if (_this->gl_config.use_egl == 1) {
#if SDL_VIDEO_OPENGL_ES || SDL_VIDEO_OPENGL_ES2
_this->GL_LoadLibrary = X11_GLES_LoadLibrary;
_this->GL_GetProcAddress = X11_GLES_GetProcAddress;
_this->GL_UnloadLibrary = X11_GLES_UnloadLibrary;
_this->GL_CreateContext = X11_GLES_CreateContext;
_this->GL_MakeCurrent = X11_GLES_MakeCurrent;
_this->GL_SetSwapInterval = X11_GLES_SetSwapInterval;
_this->GL_GetSwapInterval = X11_GLES_GetSwapInterval;
_this->GL_SwapWindow = X11_GLES_SwapWindow;
_this->GL_DeleteContext = X11_GLES_DeleteContext;
return X11_GLES_LoadLibrary(_this, path);
#else
return SDL_SetError("SDL not configured with OpenGL ES/EGL support");
#endif
}
/* Load the OpenGL library */
if (path == NULL) {
path = SDL_getenv("SDL_OPENGL_LIBRARY");
}
if (path == NULL) {
path = DEFAULT_OPENGL;
}
_this->gl_config.dll_handle = GL_LoadObject(path);
if (!_this->gl_config.dll_handle) {
#if defined(OPENGL_REQUIRES_DLOPEN) && defined(SDL_LOADSO_DLOPEN)
SDL_SetError("Failed loading %s: %s", path, dlerror());
#endif
return -1;
}
SDL_strlcpy(_this->gl_config.driver_path, path,
SDL_arraysize(_this->gl_config.driver_path));
/* Allocate OpenGL memory */
_this->gl_data =
(struct SDL_GLDriverData *) SDL_calloc(1,
sizeof(struct
SDL_GLDriverData));
if (!_this->gl_data) {
return SDL_OutOfMemory();
}
/* Load function pointers */
handle = _this->gl_config.dll_handle;
_this->gl_data->glXGetProcAddress =
(void *(*)(const GLubyte *))
GL_LoadFunction(handle, "glXGetProcAddressARB");
_this->gl_data->glXChooseVisual =
(XVisualInfo * (*)(Display *, int, int *))
X11_GL_GetProcAddress(_this, "glXChooseVisual");
_this->gl_data->glXCreateContext =
(GLXContext(*)(Display *, XVisualInfo *, GLXContext, int))
X11_GL_GetProcAddress(_this, "glXCreateContext");
_this->gl_data->glXDestroyContext =
(void (*)(Display *, GLXContext))
X11_GL_GetProcAddress(_this, "glXDestroyContext");
_this->gl_data->glXMakeCurrent =
(int (*)(Display *, GLXDrawable, GLXContext))
X11_GL_GetProcAddress(_this, "glXMakeCurrent");
_this->gl_data->glXSwapBuffers =
(void (*)(Display *, GLXDrawable))
X11_GL_GetProcAddress(_this, "glXSwapBuffers");
_this->gl_data->glXQueryDrawable =
(void (*)(Display*,GLXDrawable,int,unsigned int*))
X11_GL_GetProcAddress(_this, "glXQueryDrawable");
if (!_this->gl_data->glXChooseVisual ||
!_this->gl_data->glXCreateContext ||
!_this->gl_data->glXDestroyContext ||
!_this->gl_data->glXMakeCurrent ||
!_this->gl_data->glXSwapBuffers) {
return SDL_SetError("Could not retrieve OpenGL functions");
}
/* Initialize extensions */
X11_GL_InitExtensions(_this);
return 0;
}