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Hi


Recently we upgrade to the newest SDL 1.2.11
Now we expect 2 Problems with the OpenGL context. May this a Problem in SDL?

Multisampling doesn?t work

This is our Initialisation of the Window:

SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1);
SDL_GL_SetAttribute( SDL_GL_STENCIL_SIZE, ;
SDL_GL_SetAttribute( SDL_GL_SWAP_CONTROL , 0 );
SDL_GL_SetAttribute( SDL_GL_ACCELERATED_VISUAL, 1 );

if(antialisingwert > 0) {
if( SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS, 1 ) != 0)
popup("Error Multisampel Buffer");
if( SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES,
antialisingwert) != 0)

popup("Error Multisamples");
int buffers, samples;
SDL_GL_GetAttribute( SDL_GL_MULTISAMPLEBUFFERS, &buffers );
SDL_GL_GetAttribute( SDL_GL_MULTISAMPLESAMPLES, &samples );
DEBUG("Buffers: %d Samples: %d", buffers, samples);

}

/////// SOME CODE ////////

screen = SDL_SetVideoMode(width, high, bpp,
SDL_DOUBLEBUF|SDL_OPENGL|SDL_HWSURFACE|SDL_RESIZABLE);

//////// SOME CODE //////////


int Buffers, Samples;
SDL_GL_GetAttribute( SDL_GL_MULTISAMPLEBUFFERS, &Buffers );
SDL_GL_GetAttribute( SDL_GL_MULTISAMPLESAMPLES, &Samples );
if( antialisingwert > 0 && ( !Buffers || !Samples ) ) {
popup("Multisampling failure");
} else {
// FSAA was enabled.
}

Antialisingwert is set to 4 in this Example.
The Return value by the Deub out is: Buffers: 0 Samples: 1

Why Antialising ist?n working? Im?m Using a GForce 6600


Second Problem ? Resize the GL window
Risizing do Work. I Also resize the GL Matrix, and everything else.

Problem:
- I Start with a Window 1024x786
- Now I Resize the Window biger in both directions

SDL_PollEvent
Dont generate Events, if i move the Mouse higher than 1024
in the old Rect
of 1024x768 its working fine, but in the ?new Areas? there is no
Mouse-Motion event

Best Regards, and thanks for your Time!


Thomas G?ttling

Found the Problem!

If SDL_GL_ACCELERATED_VISUAL is set to 1, Multisampling dosnt Work.... I
have no idea why...


mit freundlichem Gru? aus Friedberg

Thomas G?ttling

On Sun, Jul 02, 2006 at 10:04:23AM +0200, G?ttling Thomas wrote:
in the old Rect

You need to call SDL_SetVideoMode with the new size, otherwise it will
behave strange.
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Good Evening,

Tnx fort he Tipp, but it still dosn?t work.
Is there Anywhere a Example with SDL-OpenGL and getting the Mouse-position
as an Event after resizing?

I nearly think it?s a bug within SDL. I tried all associated Commands like
disabling and enabling mouse capture, re-setting the screen-rect.

Do you have any idea of another try to get the Moseevents in den "new Areas"
after resizing the Window?


Best Regards

Thomas G?ttling



-----Urspr?ngliche Nachricht-----
Von: sdl-bounces+raven=tcp2.de at libsdl.org
[mailto:sdl-bounces+raven=tcp2.de at libsdl.org] Im Auftrag von Mikael Eriksson
Gesendet: Sonntag, 2. Juli 2006 22:13
An: A list for developers using the SDL library. (includes SDL-announce)
Betreff: Re: [SDL] Multisampling and Resize problem

On Sun, Jul 02, 2006 at 10:04:23AM +0200, G?ttling Thomas wrote:
in the old
Rect

You need to call SDL_SetVideoMode with the new size, otherwise it will
behave strange.