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sprite.c
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sprite.c
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/**
* 2021, Maksymilian Mruszczak <u at one u x dot o r g>
*
* A utility for drawing a sprite on SSD1331-based OLED display
*/
#include "MKL05Z4.h"
#include "LIB_Config.h"
#include "SSD1331.h"
#include "sprite.h"
/* sprite data */
#include "assets/laser.h"
#include "assets/invader.h"
#include "assets/logo.h"
#include "assets/player.h"
#include "assets/saucer.h"
Sprite sprite_bar1;
Sprite sprite_bar2;
Sprite sprite_bar3;
Sprite sprite_laser1;
Sprite sprite_laser1_alt;
Sprite sprite_laser2;
Sprite sprite_laser2_alt;
Sprite sprite_invader;
Sprite sprite_invader_alt;
Sprite sprite_invader_death;
Sprite sprite_invader2;
Sprite sprite_invader2_alt;
Sprite sprite_invader2_death;
Sprite sprite_invader3;
Sprite sprite_invader3_alt;
Sprite sprite_invader3_death;
Sprite sprite_logo;
Sprite sprite_player_g;
Sprite sprite_player_y;
Sprite sprite_player_r;
Sprite sprite_saucer;
Sprite sprite_saucer_alt;
Sprite sprite_saucer_death;
Sprite sprite_shield;
Sprite sprite_shield_alt;
Sprite sprite_shield_death;
static const uint8_t oled_width = 96;
static const uint8_t oled_height = 64;
static const uint8_t set_column_address = 0x15;
static const uint8_t set_row_address = 0x75;
void
init_sprites(void)
{
/* health bar */
sprite_bar1.data = (uint16_t *)sprite_bar1_data;
sprite_bar1.w = 48;
sprite_bar1.h = 3;
sprite_bar2.data = (uint16_t *)sprite_bar2_data;
sprite_bar2.w = 48;
sprite_bar2.h = 3;
sprite_bar3.data = (uint16_t *)sprite_bar3_data;
sprite_bar3.w = 48;
sprite_bar3.h = 3;
/* laser1 */
sprite_laser1.data = (uint16_t *)sprite_laser1_data;
sprite_laser1.w = 2;
sprite_laser1.h = 5;
sprite_laser1_alt.data = (uint16_t *)sprite_laser1_alt_data;
sprite_laser1_alt.w = 2;
sprite_laser1_alt.h = 5;
/* laser2 */
sprite_laser2.data = (uint16_t *)sprite_laser2_data;
sprite_laser2.w = 1;
sprite_laser2.h = 5;
sprite_laser2_alt.data = (uint16_t *)sprite_laser2_alt_data;
sprite_laser2_alt.w = 1;
sprite_laser2_alt.h = 5;
/* invader */
sprite_invader.data = (uint16_t *)sprite_invader_data;
sprite_invader.w = 14;
sprite_invader.h = 10;
sprite_invader_alt.data = (uint16_t *)sprite_invader_alt_data;
sprite_invader_alt.w = 14;
sprite_invader_alt.h = 10;
sprite_invader_death.data = (uint16_t *)sprite_invader_death_data;
sprite_invader_death.w = 14;
sprite_invader_death.h = 10;
/* invader2 */
sprite_invader2.data = (uint16_t *)sprite_invader2_data;
sprite_invader2.w = 14;
sprite_invader2.h = 10;
sprite_invader2_alt.data = (uint16_t *)sprite_invader2_alt_data;
sprite_invader2_alt.w = 14;
sprite_invader2_alt.h = 10;
sprite_invader2_death.data = (uint16_t *)sprite_invader2_death_data;
sprite_invader2_death.w = 14;
sprite_invader2_death.h = 10;
/* invader3 */
sprite_invader3.data = (uint16_t *)sprite_invader3_data;
sprite_invader3.w = 14;
sprite_invader3.h = 10;
sprite_invader3_alt.data = (uint16_t *)sprite_invader3_alt_data;
sprite_invader3_alt.w = 14;
sprite_invader3_alt.h = 10;
sprite_invader3_death.data = (uint16_t *)sprite_invader3_death_data;
sprite_invader3_death.w = 14;
sprite_invader3_death.h = 10;
/* logo */
sprite_logo.data = (uint16_t *)sprite_logo_data;
sprite_logo.w = 96;
sprite_logo.h = 64;
/* player */
sprite_player_g.data = (uint16_t *)sprite_player_g_data;
sprite_player_g.w = 13;
sprite_player_g.h = 5;
sprite_player_y.data = (uint16_t *)sprite_player_y_data;
sprite_player_y.w = 13;
sprite_player_y.h = 5;
sprite_player_r.data = (uint16_t *)sprite_player_r_data;
sprite_player_r.w = 13;
sprite_player_r.h = 5;
/* saucer */
sprite_saucer.data = (uint16_t *)sprite_saucer_data;
sprite_saucer.w = 18;
sprite_saucer.h = 5;
sprite_saucer_alt.data = (uint16_t *)sprite_saucer_alt_data;
sprite_saucer_alt.w = 18;
sprite_saucer_alt.h = 5;
sprite_saucer_death.data = (uint16_t *)sprite_saucer_death_data;
sprite_saucer_death.w = 18;
sprite_saucer_death.h = 5;
sprite_shield.data = (uint16_t *)sprite_shield_data;
sprite_shield.w = 16;
sprite_shield.h = 3;
sprite_shield_alt.data = (uint16_t *)sprite_shield_alt_data;
sprite_shield_alt.w = 16;
sprite_shield_alt.h = 3;
sprite_shield_death.data = (uint16_t *)sprite_shield_death_data;
sprite_shield_death.w = 16;
sprite_shield_death.h = 3;
}
/**
* like itoa (int to str) but specifically for uint16
* returns null-terminated string located at addr
* pointed by first arg
*/
char *
u16toa(char *dst, unsigned int len, uint16_t src)
{
int i;
uint16_t dig, div = 1;
while (div <= src)
div *= 10;
i = -1;
if (!src)
dst[++i] = 48;
while (++i < len && div > 1) {
div /= 10;
dig = src / div;
dst[i] = (char)(dig + 48);
src -= dig * div;
}
dst[i] = '\0';
return dst;
}
/**
* draw or clear sprite
* writes bytes directly to SSD1331 over SPI
*/
void
draw_clear_sprite(uint8_t draw, const Sprite *s, uint8_t x, uint8_t y)
{
uint8_t h, l;
int i, j, idx = 0;
/* prepare for CMD input */
__SSD1331_DC_CLR();
__SSD1331_CS_CLR();
/* set x */
__SSD1331_WRITE_BYTE(&set_column_address);
__SSD1331_WRITE_BYTE(&x);
__SSD1331_WRITE_BYTE(&oled_width);
/* set y */
__SSD1331_WRITE_BYTE(&set_row_address);
__SSD1331_WRITE_BYTE(&y);
__SSD1331_WRITE_BYTE(&oled_height);
/* change to DATA input */
__SSD1331_DC_SET();
for (i = 0; i < s->h; ++i) {
/* write a row of pixels and change pos to the next line */
for (j = 0; j < s->w; ++j) {
idx = (i * s->w + j) * draw;
h = s->data[idx] >> 8;
l = s->data[idx];
__SSD1331_WRITE_BYTE(&h);
__SSD1331_WRITE_BYTE(&l);
}
/* prepare for CMD input */
__SSD1331_DC_CLR();
/* set x */
__SSD1331_WRITE_BYTE(&set_column_address);
__SSD1331_WRITE_BYTE(&x);
__SSD1331_WRITE_BYTE(&oled_width);
/* set y */
++y;
__SSD1331_WRITE_BYTE(&set_row_address);
__SSD1331_WRITE_BYTE(&y);
__SSD1331_WRITE_BYTE(&oled_height);
/* go back to DATA mode */
__SSD1331_DC_SET();
}
__SSD1331_CS_SET();
}