unnamed-platformer/src/draw.c

#include <gint/display.h>

#define PLAYER_SIDES 11
#define BG_COLOR 0
#define LEVEL_WIDTH 28
#define DRAW_OFFSET_Y -24
#define DRAW_OFFSET_X -27

extern image_t img_player; //player texture, 12x12
extern image_t img_ground; //ground texture, 16x16
extern image_t img_spike; //spike texture, 16x16
extern image_t img_ice; //ice texture, 16x8
extern image_t img_glue; //glue texture, 16x8
extern image_t img_jitem; //jump item texture, 16x16
//animated textures
extern image_t img_elevator1;
extern image_t img_elevator2;
extern image_t img_elevator3;
extern image_t img_elevator4;
extern image_t img_elevator5;
extern image_t img_elevator6;
extern image_t img_elevator7;
extern image_t img_elevator8;
extern image_t img_elevator9;
extern image_t img_elevator10;
extern image_t img_elevator11;
extern image_t img_elevator12;
extern image_t img_elevator13;
extern image_t img_elevator14;
extern image_t img_elevator15;
extern image_t img_elevator16;
image_t* ani_elevator[16] = {&img_elevator1, &img_elevator2, &img_elevator3,
  &img_elevator4, &img_elevator5, &img_elevator6, &img_elevator7,
  &img_elevator8, &img_elevator9, &img_elevator10, &img_elevator11,
  &img_elevator12, &img_elevator13, &img_elevator14, &img_elevator15,
  &img_elevator16};

void draw_player(int old_x, int old_y, int x, int y)
{
  if (old_x != x || old_y != y)
  {
    drect(old_x + DRAW_OFFSET_X, old_y + DRAW_OFFSET_Y,
      (old_x + PLAYER_SIDES) + DRAW_OFFSET_X,
      (old_y + PLAYER_SIDES) + DRAW_OFFSET_Y, BG_COLOR);
    dimage(x + DRAW_OFFSET_X, y + DRAW_OFFSET_Y, &img_player);
  }
}

void draw_level(char level[], char upgrades[])
{
  dclear(BG_COLOR);
  unsigned int i = 0;
  unsigned int x = 0;
  unsigned int y = 0;
  while (i != LEVEL_WIDTH*16)
  {
    switch (level[i])
    {
      case '0':
        dimage(x + DRAW_OFFSET_X, y + DRAW_OFFSET_Y, &img_ground);
        break;
      case 'v':
        dimage(x + DRAW_OFFSET_X, y + DRAW_OFFSET_Y, &img_spike);
        break;
      case '~':
        dimage(x + DRAW_OFFSET_X, y + DRAW_OFFSET_Y, &img_ground);
        dimage(x + DRAW_OFFSET_X, y + DRAW_OFFSET_Y, &img_ice);
        break;
      case '#':
        dimage(x + DRAW_OFFSET_X, y + DRAW_OFFSET_Y, &img_ground);
        dimage(x + DRAW_OFFSET_X, y + DRAW_OFFSET_Y, &img_glue);
        break;
    }
    x += 16;
    if (x == 16*LEVEL_WIDTH)
    {
      x = 0;
      y += 16;
    }
    i++;
  }
}

void draw_level_anims(char level[], char upgrades[], unsigned int step)
{
  unsigned int i = 0;
  unsigned int x = 0;
  unsigned int y = 0;
  while (i != LEVEL_WIDTH*16)
  {
    switch (level[i])
    {
      case '^':
        dimage(x + DRAW_OFFSET_X, y + DRAW_OFFSET_Y, ani_elevator[((int)step/2)%16]);
        break;
      case 'j':
        if (!upgrades[0])
        {
          unsigned int buffer = ((int)step/20)%4 - 1;
          if (buffer == 2) buffer = 0;
          drect(x + DRAW_OFFSET_X, y + DRAW_OFFSET_Y, x + 15 + DRAW_OFFSET_X,
            y + 15 + DRAW_OFFSET_Y, BG_COLOR);
          dimage(x + DRAW_OFFSET_X, y + DRAW_OFFSET_Y + buffer, &img_jitem);
        }
        else level[i] = '.';
        break;
    }
    x += 16;
    if (x == 16*LEVEL_WIDTH)
    {
      x = 0;
      y += 16;
    }
    i++;
  }
}

void erase_tile(int x, int y, char level[])
{
  x = (int)(x/16);
  y = (int)(y/16);
  level[x + y * 28] = '.';
  x *= 16;
  y *= 16;
  drect(x + DRAW_OFFSET_X, y + DRAW_OFFSET_Y,
    x + 15 + DRAW_OFFSET_X,
    y + 15 + DRAW_OFFSET_Y, BG_COLOR);
}

void draw_upgrade_message(char item)
{
  switch (item)
  {
    case 'j':
    {
      extern image_t img_jitem_popup;
      dimage(96 + DRAW_OFFSET_X, 160 + DRAW_OFFSET_Y, &img_jitem_popup);
      break;
    }
  }
}