Inclusion in a full-screen GL context

Question

Okay, this is a little complicated. I detect when the application goes into full-screen mode (captures the display), and then I sometimes need to draw some materials in the context of the captured screens for notification purposes (for example, notifications about Growl, but they should also work in full-screen mode).

Is there a way to change the different context of the GL / CG application (For example, Fraps on Windows inserts the FPS counter into OGL applications)? Unfortunately, the overlay method of the shielding window does not work when capturing the display. Any ideas?

Answer 1

OpenGL Quartz Display Services. , , .

• CGLSetFullScreen , CGLSetFullScreenOnDisplay .

• , GL

.

CGOpenGLDisplayMask displayMask = CGDisplayIDToOpenGLDisplayMask(displayId);
CGLPixelFormatAttribute attribs[] = {
    kCGLPFAFullScreen,
    kCGLPFADisplayMask,
    displayMask,
    0
};

// Create gl context
GLint numPixelFormats;
CGLPixelFormatObj pixelFormatObj;
CGLChoosePixelFormat(attribs, &pixelFormatObj, &numPixelFormats);

CGLCreateContext(pixelFormatObj, NULL, &glContext);

CGLDestroyPixelFormat(pixelFormatObj);
CGLSetCurrentContext(glContext);
CGLSetFullScreen(glContext);

do {
    glLoadIdentity();

    glBegin(GL_TRIANGLES);

    glColor3f(1.0f, 0.0f, 0.0f);
    glVertex3f(0.0f, 1.0f, 0.0f);
    glColor3f(0.0f, 1.0f, 0.0f);
    glVertex3f(-1.0f, -1.0f, 0.0f);
    glColor3f(0.0f, 0.0f, 1.0f);
    glVertex3f(1.0f, -1.0f, 0.0f);

    glEnd();
    glFlush();

} while (!invalid);

Answer 2

GLFullscreen 10.6+ ( ). - , - , - , CGL. , , . , -, -.