Fullscreen Frustrations
Post: #1
I'm having difficulties getting fullscreen mode to work right. At the moment it's set up as a windowed/fullscreen deal. Whenever I enter fullscreen whatever was drawn in the window disappears.
Here's my code:
My view extends NSOpenGLView. I'm new to this so I understand that whatever I have is probably completely wrong. I've looked at the NSOpenGL Fullscreen example provided by Apple but I'm a little lost. I've Googled my brains out and haven't really come up with anything that I've found useful. Any help would be appreciated!
Here's my code:
Code:
@implementation View
- (void) makeFullScreen {
NSOpenGLPixelFormatAttribute attributes[] = {
NSOpenGLPFAFullScreen,
NSOpenGLPFAScreenMask, CGDisplayIDToOpenGLDisplayMask(kCGDirectMainDisplay),
NSOpenGLPFAColorSize, 24,
NSOpenGLPFADepthSize, 16,
NSOpenGLPFADoubleBuffer,
NSOpenGLPFAAccelerated,
0
};
NSOpenGLPixelFormat* pixelFormat = [[NSOpenGLPixelFormat alloc] initWithAttributes: attributes];
NSOpenGLContext* context = [[NSOpenGLContext alloc] initWithFormat:pixelFormat shareContext:NULL];
[pixelFormat release];
pixelFormat = nil;
CGCaptureAllDisplays();
[context setFullScreen];
[context makeCurrentContext];
}
- (BOOL) acceptsFirstResponder {
return YES;
}
- (void) drawRect: (NSRect) bounds {
glClearColor(0, 0, 0, 0);
glClear(GL_COLOR_BUFFER_BIT);
glBegin(GL_TRIANGLES);
{
glVertex3f( 0.0, 0.6, 0.0);
glVertex3f( -0.2, -0.3, 0.0);
glVertex3f( 0.2, -0.3 ,0.0);
}
glEnd();
glFlush();
}
- (void) keyDown: (NSEvent*) event {
NSString* chars = [event characters];
unichar uniChar = [chars characterAtIndex: 0];
switch(uniChar) {
case 'a':
[self makeFullScreen];
break;
case 27:
exit(0);
break;
}
}
@endMy view extends NSOpenGLView. I'm new to this so I understand that whatever I have is probably completely wrong. I've looked at the NSOpenGL Fullscreen example provided by Apple but I'm a little lost. I've Googled my brains out and haven't really come up with anything that I've found useful. Any help would be appreciated!
Post: #2
Two things stand out immediately:
1 - you have to share your windowed OpenGL context with the fullscreen conext so that your textures and things are available to both.
2 - you have to make sure the correct context is current when you want to draw. You could either do this manually at the start of drawrect: or set your fullscreen context as the context for your NSOpenGLView (which automatically makes its own context current before calling drawrect). Watch out for memory leaks if you choose that method.
1 - you have to share your windowed OpenGL context with the fullscreen conext so that your textures and things are available to both.
2 - you have to make sure the correct context is current when you want to draw. You could either do this manually at the start of drawrect: or set your fullscreen context as the context for your NSOpenGLView (which automatically makes its own context current before calling drawrect). Watch out for memory leaks if you choose that method.
