How do you know when you run out of texture memory?

[slenkar]

When I run my game in the emulator it works but some of the textures look weird,
when I run it on the DS it just shows a blank screen,

Im converting a game from desktop to DS and the textures may take up more graphics memory than the DS has, is there a way of telling if that is the problem?

[slenkar]

Im using 3D quads to draw to the screen
so all my images are textures by the way

[zeromus]

1. you know how big your textures are
2. you know how much vram you allocated for textures
3. glTexImage2D has a return value

[elhobbs]

emulators tend to be very forgiving in regards to exceptions that will hang the hardware. if you have not already, try running:

Code: Select all

defaultExceptionHandler();

at the start of your main function. if an exception occurs at will dump registers and stack to a red screen which you can use to find the source of the problem.

[slenkar]

'defaultExceptionHandler();'

thanks for the BROtip

[slenkar]

when i put that in my main function it says:

error: expected constructor, destructor, or type conversion before ';' token

[elhobbs]

when i put that in my main function it says:

error: expected constructor, destructor, or type conversion before ';' token

you need to add a header file either
#include <nds.h>
or minimally
#include <nds/arm9/exceptions.h>

[slenkar]

ah yes I put it in the wrong place, it compiles now thanks

[slenkar]

ok now if I run it in the emulator.. the emulator simply closes

If I run it on the hardware (original DS) it turns itself off!

Am I supposed to be calling the function every frame , or just once before the game loop?

[elhobbs]

no, just call it once like I indicated. if you call "exit" then it will do this. add the following code to your project - systemErrorExit gets called before exit shuts down the DS. this example relies on stdout/printf being setup and wait for the A button to be pressed before shuting down.

Code: Select all

#ifdef __cplusplus
extern "C" {
#endif 
   
void systemErrorExit(int rc) {
    printf("exit with code %d\n",rc);
    while(1) {
        swiWaitForVBlank();
        if (keysCurrent() & KEY_A) break;
    }
}

#ifdef __cplusplus
};
#endif