/*
Demonstrates the PPU's tint and monochrome bits.
Use the controller to see different combinations.
*/

#include <stdlib.h>
#include <string.h>

// include NESLIB header
#include "neslib.h"

// link the pattern table into CHR ROM
//#link "chr_generic.s"

/*{pal:"nes",layout:"nes"}*/
const char PALETTE[32] = { 
  0x2D,			// screen color

  0x00,0x30,0x30,0x00,	// background palette 0
  0x0C,0x20,0x2C,0x00,	// background palette 1
  0x14,0x10,0x25,0x00,	// background palette 2
  0x17,0x16,0x28,0x00,   // background palette 3

  0x16,0x35,0x24,0x00,	// sprite palette 0
  0x00,0x37,0x25,0x00,	// sprite palette 1
  0x0D,0x2D,0x3A,0x00,	// sprite palette 2
  0x0D,0x27,0x2A	// sprite palette 3
};

// setup PPU and tables
void setup_graphics() {
  // clear sprites
  oam_clear();
  // set palette colors
  pal_all(PALETTE);
}

void main(void)
{
  byte i;
  setup_graphics();
  // draw message  
  for (i=0; i<30; i++) {
    vram_adr(NTADR_A(1,i));
//    vram_write("\x18\x18 USE CONTROLLER FOR TINT \x18\x18\x18", 30);
    vram_write(" A:red B:green \x1e\x1f:blue \x1c\x1d:mono", 30);
  }
  // attributes
  vram_adr(0x23c0);
  vram_fill(0x00, 8);
  vram_fill(0x55, 8);
  vram_fill(0xaa, 8);
  vram_fill(0xff, 8);
  vram_fill(0x11, 8);
  vram_fill(0x33, 8);
  vram_fill(0xdd, 8);
  // enable rendering
  ppu_on_all();
  // infinite loop
  while(1) {
    byte pad = pad_poll(0);
    byte mask = MASK_BG;
    if (pad & PAD_A)
	mask |= MASK_TINT_RED;
    if (pad & PAD_B)
	mask |= MASK_TINT_GREEN;
    if (pad & (PAD_LEFT|PAD_RIGHT))
	mask |= MASK_TINT_BLUE;
    if (pad & (PAD_UP|PAD_DOWN))
	mask |= MASK_MONO;
    ppu_mask(mask);
  }
}