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toaruos/userspace/game.c

395 lines
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C
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/*
* The ToAru Sample Game
*/
#include <stdio.h>
#include <stdint.h>
#include <syscall.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
DEFN_SYSCALL0(getgraphicsaddress, 11);
DEFN_SYSCALL1(kbd_mode, 12, int);
DEFN_SYSCALL0(kbd_get, 13);
DEFN_SYSCALL1(setgraphicsoffset, 16, int);
typedef struct sprite {
uint16_t width;
uint16_t height;
uint32_t * bitmap;
uint32_t * masks;
uint32_t blank;
uint8_t alpha;
} sprite_t;
#define GFX_W 1024
#define GFX_H 768
#define GFX_B 4
#define GFX(x,y) frame_mem[GFX_W * (y) + (x)]
#define SPRITE(sprite,x,y) sprite->bitmap[sprite->width * (y) + (x)]
#define SMASKS(sprite,x,y) sprite->masks[sprite->width * (y) + (x)]
uint32_t * gfx_mem;
uint32_t * frame_mem;
uint32_t gfx_size = GFX_B * GFX_H * GFX_W;
sprite_t * sprites[128];
void * malloc_(size_t size) {
void * ret = malloc(size);
if (!ret) {
printf("[WARNING!] malloc_(%d) returned NULL!\n", size);
while ((ret = malloc(size)) == NULL) {
printf(".");
}
}
return ret;
}
uint32_t rgb(uint8_t r, uint8_t g, uint8_t b) {
return (r * 0x10000) + (g * 0x100) + (b * 0x1);
}
void flip() {
#if 1
static int offset = 768;
void * tmp = frame_mem;
frame_mem = gfx_mem;
gfx_mem = tmp;
syscall_setgraphicsoffset(offset);
offset = 768 - offset;
#else
memcpy(gfx_mem, frame_mem, gfx_size);
#endif
memset(frame_mem, 0, GFX_H * GFX_W * GFX_B);
}
void
load_sprite(sprite_t * sprite, char * filename) {
/* Open the requested binary */
FILE * image = fopen(filename, "r");
size_t image_size= 0;
fseek(image, 0, SEEK_END);
image_size = ftell(image);
fseek(image, 0, SEEK_SET);
/* Alright, we have the length */
char * bufferb = malloc_(image_size);
fread(bufferb, image_size, 1, image);
uint16_t x = 0; /* -> 212 */
uint16_t y = 0; /* -> 68 */
/* Get the width / height of the image */
signed int *bufferi = (signed int *)((uintptr_t)bufferb + 2);
uint32_t width = bufferi[4];
uint32_t height = bufferi[5];
uint16_t bpp = bufferi[6] / 0x10000;
uint32_t row_width = (bpp * width + 31) / 32 * 4;
/* Skip right to the important part */
size_t i = bufferi[2];
sprite->width = width;
sprite->height = height;
sprite->bitmap = malloc_(sizeof(uint32_t) * width * height);
for (y = 0; y < height; ++y) {
for (x = 0; x < width; ++x) {
if (i > image_size) return;
/* Extract the color */
uint32_t color;
if (bpp == 24) {
color = bufferb[i + 3 * x] +
bufferb[i+1 + 3 * x] * 0x100 +
bufferb[i+2 + 3 * x] * 0x10000;
} else if (bpp == 32) {
color = bufferb[i + 4 * x] * 0x1000000 +
bufferb[i+1 + 4 * x] * 0x100 +
bufferb[i+2 + 4 * x] * 0x10000 +
bufferb[i+3 + 4 * x] * 0x1;
}
/* Set our point */
sprite->bitmap[(height - y - 1) * width + x] = color;
}
i += row_width;
}
free(bufferb);
}
#define _RED(color) ((color & 0x00FF0000) / 0x10000)
#define _GRE(color) ((color & 0x0000FF00) / 0x100)
#define _BLU(color) ((color & 0x000000FF) / 0x1)
uint32_t alpha_blend(uint32_t bottom, uint32_t top, uint32_t mask) {
float a = _RED(mask) / 256.0;
uint8_t red = _RED(bottom) * (1.0 - a) + _RED(top) * a;
uint8_t gre = _GRE(bottom) * (1.0 - a) + _GRE(top) * a;
uint8_t blu = _BLU(bottom) * (1.0 - a) + _BLU(top) * a;
return rgb(red,gre,blu);
}
void draw_sprite(sprite_t * sprite, uint16_t x, uint16_t y) {
for (uint16_t _y = 0; _y < sprite->height; ++_y) {
for (uint16_t _x = 0; _x < sprite->width; ++_x) {
if (sprite->alpha) {
GFX(x + _x, y + _y) = alpha_blend(GFX(x + _x, y + _y), SPRITE(sprite, _x, _y), SMASKS(sprite, _x, _y));
} else {
if (SPRITE(sprite,_x,_y) != sprite->blank) {
GFX(x + _x, y + _y) = SPRITE(sprite, _x, _y);
}
}
}
}
}
void waitabit() {
int x = time(NULL);
while (time(NULL) < x + 1) {
// Do nothing.
}
}
void draw_line(uint16_t x0, uint16_t x1, uint16_t y0, uint16_t y1, uint32_t color) {
int deltax = abs(x1 - x0);
int deltay = abs(y1 - y0);
int sx = (x0 < x1) ? 1 : -1;
int sy = (y0 < y1) ? 1 : -1;
int error = deltax - deltay;
while (1) {
GFX(x0, y0) = color;
if (x0 == x1 && y0 == y1) break;
int e2 = 2 * error;
if (e2 > -deltay) {
error -= deltay;
x0 += sx;
}
if (e2 < deltax) {
error += deltax;
y0 += sy;
}
}
}
/* RPG Mapping Bits */
struct {
int width;
int height;
char * buffer;
int size;
} map;
void load_map(char * filename) {
FILE * f = fopen(filename, "r");
char tmp[256];
fgets(tmp, 255, f);
map.width = atoi(tmp);
fgets(tmp, 256, f);
map.height = atoi(tmp);
map.size = map.height * map.width;
map.buffer = malloc_(map.size);
fread(map.buffer, map.size, 1, f);
fclose(f);
}
char cell(int x, int y) {
if (x < 0 || y < 0 || x >= map.width || y >= map.height) {
return 'A'; /* The abyss is trees! */
}
return (map.buffer[y * map.width + x]);
}
#define VIEW_SIZE 4
#define CELL_SIZE 64
int my_x = 2;
int my_y = 2;
int direction = 0;
int offset_x = 0;
int offset_y = 0;
int offset_iter = 0;
int map_x = GFX_W / 2 - (64 * 9) / 2;
int map_y = GFX_H / 2 - (64 * 9) / 2;
void render_map(int x, int y) {
int i = 0;
for (int _y = y - VIEW_SIZE; _y <= y + VIEW_SIZE; ++_y) {
int j = 0;
for (int _x = x - VIEW_SIZE; _x <= x + VIEW_SIZE; ++_x) {
char c = cell(_x,_y);
int sprite;
switch (c) {
case '\n':
case 'A':
sprite = 1;
break;
case '.':
sprite = 2;
break;
case 'W':
sprite = 3;
break;
default:
sprite = 0;
break;
}
draw_sprite(sprites[sprite],
map_x + offset_x * offset_iter + j * CELL_SIZE,
map_y + offset_y * offset_iter + i * CELL_SIZE);
++j;
}
++i;
}
}
void display() {
render_map(my_x,my_y);
draw_sprite(sprites[124 + direction], map_x + CELL_SIZE * 4, map_y + CELL_SIZE * 4);
flip();
}
void transition(int nx, int ny) {
if (nx < my_x) {
offset_x = 1;
offset_y = 0;
} else if (ny < my_y) {
offset_x = 0;
offset_y = 1;
} else if (nx > my_x) {
offset_x = -1;
offset_y = 0;
} else if (ny > my_y) {
offset_x = 0;
offset_y = -1;
}
for (int i = 0; i < 64; i += 1) {
offset_iter = i;
display();
}
offset_iter = 0;
offset_x = 0;
offset_y = 0;
my_x = nx;
my_y = ny;
}
void move(int cx, int cy) {
int nx = my_x + cx;
int ny = my_y + cy;
if (cx == 1) {
if (direction != 1) {
direction = 1;
return;
}
} else if (cx == -1) {
if (direction != 2) {
direction = 2;
return;
}
} else if (cy == 1) {
if (direction != 0) {
direction = 0;
return;
}
} else if (cy == -1) {
if (direction != 3) {
direction = 3;
return;
}
}
switch (cell(nx,ny)) {
case '_':
case '.':
transition(nx,ny);
break;
default:
break;
}
}
/* woah */
char font_buffer[400000];
sprite_t alpha_tmp;
void init_sprite(int i, char * filename, char * alpha) {
sprites[i] = malloc_(sizeof(sprite_t));
load_sprite(sprites[i], filename);
if (alpha) {
sprites[i]->alpha = 1;
load_sprite(&alpha_tmp, alpha);
sprites[i]->masks = alpha_tmp.bitmap;
} else {
sprites[i]->alpha = 0;
}
sprites[i]->blank = 0x0;
}
int main(int argc, char ** argv) {
gfx_mem = (void *)syscall_getgraphicsaddress();
frame_mem = (void *)((uintptr_t)gfx_mem + sizeof(uint32_t) * 1024 * 768); //malloc_(sizeof(uint32_t) * 1024 * 768);
printf("Graphics memory is at %p, backbuffer is at %p.\n", gfx_mem, frame_mem);
printf("Loading sprites...\n");
init_sprite(0, "/etc/game/0.bmp", NULL);
init_sprite(1, "/etc/game/1.bmp", NULL);
init_sprite(2, "/etc/game/2.bmp", NULL);
init_sprite(3, "/etc/game/3.bmp", NULL);
init_sprite(4, "/etc/game/4.bmp", NULL);
init_sprite(5, "/etc/game/5.bmp", NULL);
init_sprite(6, "/etc/game/6.bmp", NULL);
init_sprite(7, "/etc/game/7.bmp", NULL);
init_sprite(124, "/etc/game/remilia.bmp", NULL);
init_sprite(125, "/etc/game/remilia_r.bmp", NULL);
init_sprite(126, "/etc/game/remilia_l.bmp", NULL);
init_sprite(127, "/etc/game/remilia_f.bmp", NULL);
load_map("/etc/game/map");
printf("%d x %d\n", map.width, map.height);
printf("\033[J\n");
syscall_kbd_mode(1);
int playing = 1;
while (playing) {
display();
char ch = 0;
ch = syscall_kbd_get();
switch (ch) {
case 16:
playing = 0;
break;
case 30:
move(-1,0);
/* left */
break;
case 32:
move(1,0);
/* right */
break;
case 31:
move(0,1);
/* Down */
break;
case 17:
move(0,-1);
/* Up */
break;
case 18:
break;
default:
break;
}
}
syscall_kbd_mode(0);
return 0;
}
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