cool-bun-demo/32x50_bun.c

/**
* What do we need
* * [ ] screen setup
*/

#include <hardware/custom.h>
#include <hardware/cia.h>

#include <clib/graphics_protos.h>

#include "system/system.h"
#include "system/copper.h"
#include "system/blitter.h"

#include "screen.h"

extern struct Custom far custom;
extern struct CIA far ciaa;

uint16_t custom_color = (uint16_t)offsetof(Custom, color);
uint16_t custom_sprite = (uint16_t)offsetof(Custom, sprpt);
uint16_t custom_sprite_control = (uint16_t)offsetof(Custom, spr);

extern unsigned char chip coolbun[];

int main(void) {
  struct ScreenDefinition screenDefinition;
  struct ActiveScreenBufferDetails activeScreenBufferDetails;
  uint16_t *copperlist, *currentCopperlist;
  void *copperlistBitplanePointers[8][2];
  int i, plane;

  allocateDoubleBufferedScreenMemory(
    &screenDefinition,
    &activeScreenBufferDetails,
    320,
    256,
    2
  );

  copperlist = prepareNewCopperlist(300);

  currentCopperlist = addDisplayToCopperlist(
    copperlist,
    &screenDefinition,
    &activeScreenBufferDetails,
    &copperlistBitplanePointers
  );

  COPPERLIST_MOVE(currentCopperlist, custom_color, 0x3a6);
  COPPERLIST_MOVE(currentCopperlist, custom_color + 2, 0x000);
  COPPERLIST_MOVE(currentCopperlist, custom_color + 4, 0xfff);
  currentCopperlist = setUpEmptySpritesInCopperlist(currentCopperlist);

  endCopperlist(currentCopperlist);

  takeOverSystem();

  setCopperlist(copperlist);
  setUpDisplay((uint32_t)screenDefinition.bitplanes);

  // Render a bun at 32x50

  for (plane = 0; plane < 2; ++plane) {
    custom.bltcon0 = BLTCON0(0xf0, 1, 0, 0, 1, 0);
    custom.bltcon1 = BLTCON1(BLITTER_ASCENDING, 0);

    custom.bltapt = coolbun + (plane * 4 * 32);
    custom.bltdpt = activeScreenBufferDetails.planes[plane] + (50 * 320 / 8) + 32 / 8;
    custom.bltafwm = 0xffff;
    custom.bltalwm = 0xffff;

    custom.bltamod = 0;
    custom.bltdmod = 40 - 4;

    custom.bltsize = 2 + (32 << 6);

    WaitBlit();
  }

  while (1) {
    if ((ciaa.ciapra >> 6) != 3) break;
  }

  giveBackSystem();

  freeCopperlist(copperlist);

  teardownScreen(&screenDefinition);
}