/**
* Initialize an EGL context for the current display.
*/
EGLContext fghCreateNewContextEGL( SFG_Window* window ) {
EGLContext context;
EGLint ver = -1;
EGLDisplay eglDisplay = fgDisplay.pDisplay.egl.Display;
EGLConfig eglConfig = window->Window.pContext.egl.Config;
/* On GLES, user specifies the target version with glutInitContextVersion */
EGLint attributes[32];
int where = 0;
ATTRIB_VAL(EGL_CONTEXT_CLIENT_VERSION, fgState.MajorVersion);
ATTRIB(EGL_NONE);
context = eglCreateContext(eglDisplay, eglConfig, EGL_NO_CONTEXT, attributes);
if (context == EGL_NO_CONTEXT) {
fgWarning("Cannot initialize EGL context, err=%x\n", eglGetError());
fghContextCreationError();
}
eglQueryContext(fgDisplay.pDisplay.egl.Display, context, EGL_CONTEXT_CLIENT_VERSION, &ver);
if (ver != fgState.MajorVersion)
fgError("Wrong GLES major version: %d\n", ver);
return context;
}
/**
* Initialize an EGL context for the current display.
*/
EGLContext fghCreateNewContextEGL( SFG_Window* window ) {
EGLContext context;
EGLDisplay eglDisplay = fgDisplay.pDisplay.egl.Display;
EGLConfig eglConfig = window->Window.pContext.egl.Config;
/* Ensure OpenGLES 2.0 context */
static const EGLint ctx_attribs[] = {
#ifdef GL_ES_VERSION_2_0
EGL_CONTEXT_CLIENT_VERSION, 2,
#elif GL_VERSION_ES_CM_1_0 || GL_VERSION_ES_CL_1_0 || GL_VERSION_ES_CM_1_1 || GL_VERSION_ES_CL_1_1
EGL_CONTEXT_CLIENT_VERSION, 1,
#endif
EGL_NONE
};
context = eglCreateContext(eglDisplay, eglConfig, EGL_NO_CONTEXT, ctx_attribs);
if (context == EGL_NO_CONTEXT) {
fgWarning("Cannot initialize EGL context, err=%x\n", eglGetError());
fghContextCreationError();
}
EGLint ver = -1;
eglQueryContext(fgDisplay.pDisplay.egl.Display, context, EGL_CONTEXT_CLIENT_VERSION, &ver);
#ifdef GL_ES_VERSION_2_0
if (ver != 2)
#else
if (ver != 1)
#endif
fgError("Wrong GLES major version: %d\n", ver);
return context;
}
void fgNewWGLCreateContext( SFG_Window* window )
{
HGLRC context;
int attributes[9];
PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB;
/* If nothing fancy has been required, leave the context as it is */
if ( fghIsLegacyContextRequested() )
{
return;
}
wglMakeCurrent( window->Window.pContext.Device, window->Window.Context );
if ( !fghIsExtensionSupported( window->Window.pContext.Device, "WGL_ARB_create_context" ) )
{
/* wglCreateContextAttribsARB not found, yet the user has requested the new context creation */
fgWarning( "OpenGL >2.1 context requested but wglCreateContextAttribsARB is not available! Falling back to legacy context creation" );
/* Legacy context already created at this point in WM_CREATE path of fgPlatformWindowProc, just return */
return;
}
/* new context creation */
fghFillContextAttributes( attributes );
wglCreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC) wglGetProcAddress( "wglCreateContextAttribsARB" );
if ( wglCreateContextAttribsARB == NULL )
{
/* wglCreateContextAttribsARB not found, yet the user has requested the new context creation */
fgWarning( "OpenGL >2.1 context requested but wglCreateContextAttribsARB is not available! Falling back to legacy context creation" );
/* Legacy context already created at this point in WM_CREATE path of fgPlatformWindowProc, just return */
return;
}
context = wglCreateContextAttribsARB( window->Window.pContext.Device, 0, attributes );
if ( context == NULL )
{
fghContextCreationError();
}
wglMakeCurrent( NULL, NULL );
wglDeleteContext( window->Window.Context );
window->Window.Context = context;
}
void fgNewWGLCreateContext( SFG_Window* window )
{
HGLRC context;
int attributes[9];
PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB;
/* If nothing fancy has been required, leave the context as it is */
if ( fghIsLegacyContextRequested() )
{
return;
}
wglMakeCurrent( window->Window.pContext.Device, window->Window.Context );
if ( !fghIsExtensionSupported( window->Window.pContext.Device, "WGL_ARB_create_context" ) )
{
return;
}
/* new context creation */
fghFillContextAttributes( attributes );
wglCreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC) wglGetProcAddress( "wglCreateContextAttribsARB" );
if ( wglCreateContextAttribsARB == NULL )
{
fgError( "wglCreateContextAttribsARB not found" );
}
context = wglCreateContextAttribsARB( window->Window.pContext.Device, 0, attributes );
if ( context == NULL )
{
fghContextCreationError();
}
wglMakeCurrent( NULL, NULL );
wglDeleteContext( window->Window.Context );
window->Window.Context = context;
}
