graphics/Sprites/ObjectSize/ObjectSize.c

/*---------------------------------------------------------------------------------
 
 
    Object size demo
 
 
---------------------------------------------------------------------------------*/
#include <snes.h>
 
extern char snesfont, snespal;
extern char sprite8, sprite8_end, palsprite8, palsprite8_end;
extern char sprite16, sprite16_end, palsprite16, palsprite16_end;
extern char sprite32, sprite32_end, palsprite32, palsprite32_end;
extern char sprite64, sprite64_end, palsprite64, palsprite64_end;
 
u16 selectedItem;
bool keyPressed;
 
#define ADRBG1 0x2000
 
#define ADRSPRITE 0x2100
#define ADRSPRITLARDGE 0x2500 // arbitrary to have enough space but small & large one
 
#define PALETTESPRSIZE (16 * 2) // We are using words for palette entry
 
// Put menu for each sprite size test
void draw()
{
    consoleDrawText(3, 2, "Object size :");
    consoleDrawText(3, 3, "%s %s", selectedItem == 0 ? ">" : " ", "Small:  8 - Large: 16");
    consoleDrawText(3, 4, "%s %s", selectedItem == 1 ? ">" : " ", "Small:  8 - Large: 32");
    consoleDrawText(3, 5, "%s %s", selectedItem == 2 ? ">" : " ", "Small:  8 - Large: 64");
    consoleDrawText(3, 6, "%s %s", selectedItem == 3 ? ">" : " ", "Small: 16 - Large: 32");
    consoleDrawText(3, 7, "%s %s", selectedItem == 4 ? ">" : " ", "Small: 16 - Large: 64");
    consoleDrawText(3, 8, "%s %s", selectedItem == 5 ? ">" : " ", "Small: 32 - Large: 64");
 
}
 
// Load current sprites regarding size for small & large one
void changeObjSize()
{
 
    // Force wait VBlank to avoid black frame
    WaitForVBlank();
 
    // check regarding the current selection
    if (selectedItem == 0)
    {
        // load small sprite with 16 colors palette
        oamInitGfxSet(&sprite8, (&sprite8_end - &sprite8), &palsprite8, PALETTESPRSIZE, 0, ADRSPRITE, OBJ_SIZE8_L16);
 
        // load large sprite with palette
        dmaCopyVram(&sprite16, ADRSPRITLARDGE, (&sprite16_end - &sprite16));
        dmaCopyCGram(&palsprite16, (128 + 1 * 16), PALETTESPRSIZE);
    }
    else if (selectedItem == 1)
    {
        // load small sprite
        oamInitGfxSet(&sprite8, (&sprite8_end - &sprite8), &palsprite8, PALETTESPRSIZE, 0, ADRSPRITE, OBJ_SIZE8_L32);
 
        // load large sprite with palette
        dmaCopyVram(&sprite32, ADRSPRITLARDGE, (&sprite32_end - &sprite32));
        dmaCopyCGram(&palsprite32, (128 + 1 * 16), PALETTESPRSIZE);
    }
    else if (selectedItem == 2)
    {
        oamInitGfxSet(&sprite8, (&sprite8_end - &sprite8), &palsprite8, PALETTESPRSIZE, 0, ADRSPRITE, OBJ_SIZE8_L64);
 
        dmaCopyVram(&sprite64, ADRSPRITLARDGE, (&sprite64_end - &sprite64));
        dmaCopyCGram(&palsprite64, (128 + 1 * 16), PALETTESPRSIZE);
    }
    else if (selectedItem == 3)
    {
        oamInitGfxSet(&sprite16, (&sprite16_end - &sprite16), &palsprite16, PALETTESPRSIZE, 0, ADRSPRITE, OBJ_SIZE16_L32);
 
        dmaCopyVram(&sprite32, ADRSPRITLARDGE, (&sprite32_end - &sprite32));
        dmaCopyCGram(&palsprite32, (128 + 1 * 16), PALETTESPRSIZE);
    }
    else if (selectedItem == 4)
    {
        oamInitGfxSet(&sprite16, (&sprite16_end - &sprite16), &palsprite16, PALETTESPRSIZE, 0, ADRSPRITE, OBJ_SIZE16_L64);
 
        dmaCopyVram(&sprite64, ADRSPRITLARDGE, (&sprite64_end - &sprite64));
        dmaCopyCGram(&palsprite64, (128 + 1 * 16), PALETTESPRSIZE);
    }
    else if (selectedItem == 5)
    {
        oamInitGfxSet(&sprite32, (&sprite32_end - &sprite32), &palsprite32, PALETTESPRSIZE, 0, ADRSPRITE, OBJ_SIZE32_L64);
 
        dmaCopyVram(&sprite64, ADRSPRITLARDGE, (&sprite64_end - &sprite64));
        dmaCopyCGram(&palsprite64, (128 + 1 * 16), PALETTESPRSIZE);
    }
    // because we load graphics at 0x2100, offset is 0x10 (0x2100-0x2000)/16
    oamSet(0, 70, 120, 3, 0, 0, 0x0010, 0);
    oamSetEx(0, OBJ_SMALL, OBJ_SHOW);
 
    // because we load graphics at 0x2500, offset is 0x50 (0x2500-0x2000)/16
    oamSet(4, 170, 120, 3, 0, 0, 0x0050, 1);
    oamSetEx(4, OBJ_LARGE, OBJ_SHOW);
    
}
 
//---------------------------------------------------------------------------------
int main(void)
{
    unsigned short pad0;
 
    // Initialize SNES
    consoleInit();
 
    // Initialize text console with our font
    consoleSetTextVramBGAdr(0x6800);
    consoleSetTextVramAdr(0x3000);
    consoleSetTextOffset(0x0100);
    consoleInitText(0, 16 * 2, &snesfont, &snespal);
 
    // Init background
    bgSetGfxPtr(0, ADRBG1);
    bgSetMapPtr(0, 0x6803, SC_32x32);
 
    // Now Put in 16 color mode and disable all backgrounds
    setMode(BG_MODE1, 0);
    bgSetDisable(1);
    bgSetDisable(2);
 
    selectedItem = 0;
    keyPressed = false;
    draw();
    changeObjSize();
 
    setScreenOn();
 
    while (1)
    {
 
        pad0 = padsCurrent(0);
 
        if (pad0)
        {
            if (pad0 & KEY_UP)
            {
                if (selectedItem > 0 && !keyPressed)
                {
                    selectedItem--;
                    draw();
                    changeObjSize();
                    keyPressed = true;
                }
            }
            if (pad0 & KEY_DOWN)
            {
                if (selectedItem < 5 && !keyPressed)
                {
                    selectedItem++;
                    draw();
                    changeObjSize();
                    keyPressed = true;
                }
            }
        }
        else
            keyPressed = false;
 
        WaitForVBlank();
    }
    return 0;
}