I tried that before but ended up getting frustrated with the loose files and multiple file operations to do a single thing.dheart88 wrote:There's no problem with me.. because i use memcpy in the beginning of class, and I copy sprite/background from filesystem and copy it into RAM and later, when I need that sprite/background, I just call dmaCopy function to copy from RAM into RAM
Personally, I still prefer to use gfx2gba013 to convert sprite/background into
bgPal.bin
bgTiles.bin
bgMap.bin
and then I just call it from nitro fs.. it's really simple, just a simple memcpy and no other decompressing method...
Well, next time I'll post my complete code...
I didn't remember cearn's example code correctly.Code: Select all
int GRF_Decompress( u32* Source, void* Dest ) {
u32 Header;
u32 Size;
if ( Source && Dest ) {
Source+= 2;
Header = *Source;
Size = Header >> 8;
DC_FlushRange( Source, Size );
switch ( Header & 0xF0 ) {
case 0x00: {
dmaCopy( Source + 1, Dest, Size );
break;
}
case 0x10: {
decompress( Source, Dest, LZ77Vram );
break;
}
case 0x20: {
decompress( Source, Dest, HUFF );
break;
}
case 0x30: {
decompress( Source, Dest, RLEVram );
break;
}
default: return 0;
};
// This fixed it :)
//DC_InvalidateRange( Dest, Size );
DC_FlushRange( Dest, Size );
return 1;
}
return 0;
}
Code: Select all
int GRF_Decompress( u32* Source, void* Dest ) {
u32 Header;
u32 Size;
if ( Source && Dest ) {
Source+= 2;
Header = *Source;
Size = Header >> 8;
switch ( Header & 0xF0 ) {
case 0x00: {
DC_FlushRange( Source + 1, Size );
DC_FlushRange( Dest, Size );
dmaCopy( Source + 1, Dest, Size );
break;
}
case 0x10: {
decompress( Source, Dest, LZ77Vram );
break;
}
case 0x20: {
decompress( Source, Dest, HUFF );
break;
}
case 0x30: {
decompress( Source, Dest, RLEVram );
break;
}
default: return 0;
};
// This fixed it :)
//DC_InvalidateRange( Dest, Size );
return 1;
}
return 0;
}
Code: Select all
#define CACHE_LINE_SIZE 32
// Assuming cached regions. Add tests for that yourself.
void dmaCopySafish(const void *src, void *dst, u32 size)
{
DC_FlushRange(src, size); // Flush source.
u32 addr= (u32)dst;
if(addr % CACHE_LINE_SIZE) // Check head
DC_FlushRange((void*)(addr), 1);
if((addr+size) % CACHE_LINE_SIZE) // Check tail.
DC_FlushRange((void*)(addr+size), 1);
dmaCopy(src, dst, size); // Actual copy.
DC_InvalidateRange(dst, size); // Final invalidate.
}
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