SDL_GLContext
WIN_GL_CreateContext(_THIS, SDL_Window * window)
{
HDC hdc = ((SDL_WindowData *) window->driverdata)->hdc;
HGLRC context;
if (_this->gl_config.major_version < 3) {
context = _this->gl_data->wglCreateContext(hdc);
} else {
PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB;
HGLRC temp_context = _this->gl_data->wglCreateContext(hdc);
if (!temp_context) {
SDL_SetError("Could not create GL context");
return NULL;
}
/* Make the context current */
if (WIN_GL_MakeCurrent(_this, window, temp_context) < 0) {
WIN_GL_DeleteContext(_this, temp_context);
return NULL;
}
wglCreateContextAttribsARB =
(PFNWGLCREATECONTEXTATTRIBSARBPROC) _this->gl_data->
wglGetProcAddress("wglCreateContextAttribsARB");
if (!wglCreateContextAttribsARB) {
SDL_SetError("GL 3.x is not supported");
context = temp_context;
} else {
int attribs[] = {
WGL_CONTEXT_MAJOR_VERSION_ARB, _this->gl_config.major_version,
WGL_CONTEXT_MINOR_VERSION_ARB, _this->gl_config.minor_version,
0
};
/* Create the GL 3.x context */
context = wglCreateContextAttribsARB(hdc, 0, attribs);
/* Delete the GL 2.x context */
_this->gl_data->wglDeleteContext(temp_context);
}
}
if (!context) {
WIN_SetError("Could not create GL context");
return NULL;
}
if (WIN_GL_MakeCurrent(_this, window, context) < 0) {
WIN_GL_DeleteContext(_this, context);
return NULL;
}
WIN_GL_InitExtensions(_this, hdc);
return context;
}
SDL_GLContext
WIN_GL_CreateContext(_THIS, SDL_Window * window)
{
HDC hdc = ((SDL_WindowData *) window->driverdata)->hdc;
HGLRC context, share_context;
if (_this->gl_config.profile_mask == SDL_GL_CONTEXT_PROFILE_ES &&
!_this->gl_data->HAS_WGL_EXT_create_context_es2_profile) {
#if SDL_VIDEO_OPENGL_EGL
/* Switch to EGL based functions */
WIN_GL_UnloadLibrary(_this);
_this->GL_LoadLibrary = WIN_GLES_LoadLibrary;
_this->GL_GetProcAddress = WIN_GLES_GetProcAddress;
_this->GL_UnloadLibrary = WIN_GLES_UnloadLibrary;
_this->GL_CreateContext = WIN_GLES_CreateContext;
_this->GL_MakeCurrent = WIN_GLES_MakeCurrent;
_this->GL_SetSwapInterval = WIN_GLES_SetSwapInterval;
_this->GL_GetSwapInterval = WIN_GLES_GetSwapInterval;
_this->GL_SwapWindow = WIN_GLES_SwapWindow;
_this->GL_DeleteContext = WIN_GLES_DeleteContext;
if (WIN_GLES_LoadLibrary(_this, NULL) != 0) {
return NULL;
}
return WIN_GLES_CreateContext(_this, window);
#else
SDL_SetError("SDL not configured with EGL support");
return NULL;
#endif
}
if (_this->gl_config.share_with_current_context) {
share_context = (HGLRC)SDL_GL_GetCurrentContext();
} else {
share_context = 0;
}
if (_this->gl_config.major_version < 3 &&
_this->gl_config.profile_mask == 0 &&
_this->gl_config.flags == 0) {
/* Create legacy context */
context = _this->gl_data->wglCreateContext(hdc);
if( share_context != 0 ) {
_this->gl_data->wglShareLists(share_context, context);
}
} else {
PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB;
HGLRC temp_context = _this->gl_data->wglCreateContext(hdc);
if (!temp_context) {
SDL_SetError("Could not create GL context");
return NULL;
}
/* Make the context current */
if (WIN_GL_MakeCurrent(_this, window, temp_context) < 0) {
WIN_GL_DeleteContext(_this, temp_context);
return NULL;
}
wglCreateContextAttribsARB =
(PFNWGLCREATECONTEXTATTRIBSARBPROC) _this->gl_data->
wglGetProcAddress("wglCreateContextAttribsARB");
if (!wglCreateContextAttribsARB) {
SDL_SetError("GL 3.x is not supported");
context = temp_context;
} else {
/* max 10 attributes plus terminator */
int attribs[11] = {
WGL_CONTEXT_MAJOR_VERSION_ARB, _this->gl_config.major_version,
WGL_CONTEXT_MINOR_VERSION_ARB, _this->gl_config.minor_version,
0
};
int iattr = 4;
/* SDL profile bits match WGL profile bits */
if (_this->gl_config.profile_mask != 0) {
attribs[iattr++] = WGL_CONTEXT_PROFILE_MASK_ARB;
attribs[iattr++] = _this->gl_config.profile_mask;
}
/* SDL flags match WGL flags */
if (_this->gl_config.flags != 0) {
attribs[iattr++] = WGL_CONTEXT_FLAGS_ARB;
attribs[iattr++] = _this->gl_config.flags;
}
/* only set if wgl extension is available */
if (_this->gl_data->HAS_WGL_ARB_context_flush_control) {
attribs[iattr++] = WGL_CONTEXT_RELEASE_BEHAVIOR_ARB;
attribs[iattr++] = _this->gl_config.release_behavior ?
WGL_CONTEXT_RELEASE_BEHAVIOR_FLUSH_ARB :
WGL_CONTEXT_RELEASE_BEHAVIOR_NONE_ARB;
}
attribs[iattr++] = 0;
/* Create the GL 3.x context */
context = wglCreateContextAttribsARB(hdc, share_context, attribs);
/* Delete the GL 2.x context */
_this->gl_data->wglDeleteContext(temp_context);
}
}
if (!context) {
WIN_SetError("Could not create GL context");
return NULL;
}
if (WIN_GL_MakeCurrent(_this, window, context) < 0) {
WIN_GL_DeleteContext(_this, context);
return NULL;
}
return context;
}
SDL_GLContext
WIN_GL_CreateContext(_THIS, SDL_Window * window)
{
HDC hdc = ((SDL_WindowData *) window->driverdata)->hdc;
HGLRC context, share_context;
if (_this->gl_config.share_with_current_context) {
share_context = (HGLRC)(_this->current_glctx);
} else {
share_context = 0;
}
if (_this->gl_config.major_version < 3 &&
_this->gl_config.profile_mask == 0 &&
_this->gl_config.flags == 0) {
/* Create legacy context */
context = _this->gl_data->wglCreateContext(hdc);
if( share_context != 0 ) {
_this->gl_data->wglShareLists(share_context, hdc);
}
} else {
PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB;
HGLRC temp_context = _this->gl_data->wglCreateContext(hdc);
if (!temp_context) {
SDL_SetError("Could not create GL context");
return NULL;
}
/* Make the context current */
if (WIN_GL_MakeCurrent(_this, window, temp_context) < 0) {
WIN_GL_DeleteContext(_this, temp_context);
return NULL;
}
wglCreateContextAttribsARB =
(PFNWGLCREATECONTEXTATTRIBSARBPROC) _this->gl_data->
wglGetProcAddress("wglCreateContextAttribsARB");
if (!wglCreateContextAttribsARB) {
SDL_SetError("GL 3.x is not supported");
context = temp_context;
} else {
/* max 8 attributes plus terminator */
int attribs[9] = {
WGL_CONTEXT_MAJOR_VERSION_ARB, _this->gl_config.major_version,
WGL_CONTEXT_MINOR_VERSION_ARB, _this->gl_config.minor_version,
0
};
int iattr = 4;
/* SDL profile bits match WGL profile bits */
if( _this->gl_config.profile_mask != 0 ) {
attribs[iattr++] = WGL_CONTEXT_PROFILE_MASK_ARB;
attribs[iattr++] = _this->gl_config.profile_mask;
}
/* SDL flags match WGL flags */
if( _this->gl_config.flags != 0 ) {
attribs[iattr++] = WGL_CONTEXT_FLAGS_ARB;
attribs[iattr++] = _this->gl_config.flags;
}
attribs[iattr++] = 0;
/* Create the GL 3.x context */
context = wglCreateContextAttribsARB(hdc, share_context, attribs);
/* Delete the GL 2.x context */
_this->gl_data->wglDeleteContext(temp_context);
}
}
if (!context) {
WIN_SetError("Could not create GL context");
return NULL;
}
if (WIN_GL_MakeCurrent(_this, window, context) < 0) {
WIN_GL_DeleteContext(_this, context);
return NULL;
}
WIN_GL_InitExtensions(_this, hdc);
return context;
}