forums.ps2dev.org

[kazlivsjy]

I have this weird problem: when I copyImage a background bitmap into the screen, I get some 'garbage' in the bottom-most lines, in the form of spureous-looking black or colour-inverting horizontal lines, with varying length. They appear and disappear during the first frames of animation and then stand still. I suspect it has anything to do with an incorrect configuration of the different buffers and/or data structures that fill the VRAM (draw buffer, depth buffer, etc...), as though they overlapped at some point, but I don't think it's the case. I don't know what goes on when swapBuffers is called, though. I don't even know the size of the VRAM!

The really weird thing is that sometimes it doesn't happen, or a texture is garbaged instead of the background!

My RGBA8888 480x272 image is held on a int buffer with size [512*272] 16-byte aligned

I call
sceGuCopyImage(GU_PSM_8888,0,0,480,272,512,pixeldata,0,0,512,(void*)(0x04000000+(u32)framebuffer));

on every frame, framebuffer = sceGuSwapBuffers()

Can anybody tell or suggest what is the problem?
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void printSignature(void) {

printf("Brought to you by Kazlivsjy\n");

}

[Brunni]

You just need to flush the cache before drawing an image that was modified with the CPU. Call sceKernelDcacheWritebackInvalidateAll();
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Sorry for my bad english
Oldschool library for PSP - PC version released

[kazlivsjy]

Yeah, thanks, man!
_________________
void printSignature(void) {

printf("Brought to you by Kazlivsjy\n");

}