Define terrain rendering and loading

12 files changed, 412 insertions, 150 deletions

diff --git a/src/camera/privinc/camera_private.h b/src/camera/privinc/camera_private.h
index e83c255..bd78cb0 100644
--- a/src/camera/privinc/camera_private.h
+++ b/src/camera/privinc/camera_private.h
@@ -13,8 +13,8 @@ extern "C"
 
 enum
 {
-    CAMERA_CURSOR_WIDTH = 20,
-    CAMERA_CURSOR_HEIGHT = 20
+    CAMERA_CURSOR_WIDTH = 16,
+    CAMERA_CURSOR_HEIGHT = 16
 };
 
 void camera_update_pos(struct camera *cam);
diff --git a/src/container/inc/container.h b/src/container/inc/container.h
index 59ab5fd..31685db 100644
--- a/src/container/inc/container.h
+++ b/src/container/inc/container.h
@@ -26,11 +26,6 @@ struct container
         struct sprite *sprite;
         struct sound *sound;
     } data;
-
-    struct container_rt
-    {
-        struct container *c;
-    } *rt;
 };
 
 int container_load_ex(const char *path, const struct container *list, size_t n);
diff --git a/src/game/inc/game.h b/src/game/inc/game.h
index 66e5e79..1dfdd58 100644
--- a/src/game/inc/game.h
+++ b/src/game/inc/game.h
@@ -30,6 +30,7 @@ struct game_cfg
 
     size_t n;
     union peripheral *p;
+    const char *map;
 };
 
 int game_resinit(void);
diff --git a/src/game/src/game.c b/src/game/src/game.c
index 084415c..cbfb648 100644
--- a/src/game/src/game.c
+++ b/src/game/src/game.c
@@ -14,8 +14,11 @@ int game(const struct game_cfg *const cfg)
     struct human_player human;
     struct terrain_map map;
 
-    terrain_init(&map);
-    building_set_alive_cb(terrain_block_update, &map);
+    if (terrain_init(cfg->map, &map))
+    {
+        fprintf(stderr, "%s: terrain_init failed\n", __func__);
+        return -1;
+    }
 
     const struct human_player_cfg hcfg =
     {
diff --git a/src/game/src/res.c b/src/game/src/res.c
index bf05bd9..6489d30 100644
--- a/src/game/src/res.c
+++ b/src/game/src/res.c
@@ -12,7 +12,45 @@
 #include <unit.h>
 #include <stdbool.h>
 
-static const struct container c[1];
+static const struct container c[] =
+{
+    {
+        .path = "sidewalk",
+        .type = CONTAINER_TYPE_SPRITE,
+        .data.sprite = &terrain_sprites[SIDEWALK]
+    },
+    {
+        .path = "roof1",
+        .type = CONTAINER_TYPE_SPRITE,
+        .data.sprite = &terrain_sprites[ROOF1]
+    },
+    {
+        .path = "roof2",
+        .type = CONTAINER_TYPE_SPRITE,
+        .data.sprite = &terrain_sprites[ROOF2]
+    },
+    {
+        .path = "cursor",
+        .type = CONTAINER_TYPE_SPRITE,
+        .data.sprite = &cursor_sprite
+    },
+    {
+        .path = "btn_left",
+        .type = CONTAINER_TYPE_SPRITE,
+        .data.sprite = &gui_button_sprites[GUI_BUTTON_LEFT]
+    },
+    {
+        .path = "btn_mid",
+        .type = CONTAINER_TYPE_SPRITE,
+        .data.sprite = &gui_button_sprites[GUI_BUTTON_MID]
+    },
+    {
+        .path = "btn_right",
+        .type = CONTAINER_TYPE_SPRITE,
+        .data.sprite = &gui_button_sprites[GUI_BUTTON_RIGHT]
+    },
+};
+
 static bool init;
 
 void game_free(void)
diff --git a/src/menu/src/menu.c b/src/menu/src/menu.c
index de1fa57..cc508e7 100644
--- a/src/menu/src/menu.c
+++ b/src/menu/src/menu.c
@@ -74,7 +74,8 @@ int menu(void)
 
     const struct game_cfg gcfg =
     {
-        .p = &c.p
+        .p = &c.p,
+        .map = "city1.txt"
     };
 
     return game(&gcfg);
diff --git a/src/terrain/CMakeLists.txt b/src/terrain/CMakeLists.txt
index 7a0e5bd..18726c8 100644
--- a/src/terrain/CMakeLists.txt
+++ b/src/terrain/CMakeLists.txt
@@ -1,3 +1,7 @@
-add_library(terrain "src/terrain.c")
+add_library(terrain
+    "src/init.c"
+    "src/render.c"
+    "src/update.c"
+)
 target_include_directories(terrain PUBLIC "inc")
 target_link_libraries(terrain PUBLIC container camera gfx util)
diff --git a/src/terrain/inc/terrain.h b/src/terrain/inc/terrain.h
index d640f17..f6cf37f 100644
--- a/src/terrain/inc/terrain.h
+++ b/src/terrain/inc/terrain.h
@@ -21,26 +21,95 @@ enum
 
 enum terrain_type
 {
-    TERRAIN_TYPE_GRASS
+    ROOF1_1_NW,
+    ROOF1_1_N,
+    ROOF1_1_NE,
+    ROOF1_2_NW,
+    ROOF1_2_NE,
+    ROOF1_3_NW,
+    ROOF1_3_N,
+    ROOF1_3_NE,
+    ROOF1_4_N,
+
+    ROOF1_1_W,
+    ROOF1_1_C,
+    ROOF1_1_E,
+    ROOF1_2_SW,
+    ROOF1_2_SE,
+    ROOF1_3_SW,
+    ROOF1_3_S,
+    ROOF1_3_SE,
+    ROOF1_4_C,
+
+    ROOF1_1_SW,
+    ROOF1_1_S,
+    ROOF1_1_SE,
+    ROOF1_5_W,
+    ROOF1_5_C,
+    ROOF1_5_E,
+    ROOF1_6,
+    ROOF1_4_S,
+
+    ROOF2_1_NW,
+    ROOF2_1_N,
+    ROOF2_1_NE,
+    ROOF2_2_NW,
+    ROOF2_2_NE,
+    ROOF2_3_NW,
+    ROOF2_3_N,
+    ROOF2_3_NE,
+    ROOF2_4_N,
+
+    ROOF2_1_W,
+    ROOF2_1_C,
+    ROOF2_1_E,
+    ROOF2_2_SW,
+    ROOF2_2_SE,
+    ROOF2_3_SW,
+    ROOF2_3_S,
+    ROOF2_3_SE,
+    ROOF2_4_C,
+
+    ROOF2_1_SW,
+    ROOF2_1_S,
+    ROOF2_1_SE,
+    ROOF2_5_W,
+    ROOF2_5_C,
+    ROOF2_5_E,
+    ROOF2_6,
+    ROOF2_4_S,
+
+    ROOF1_START = ROOF1_1_NW,
+    ROOF1_END = ROOF1_4_S,
+    ROOF2_START = ROOF2_1_NW,
+    ROOF2_END = ROOF2_4_S
 };
 
 struct terrain_map
 {
     struct terrain_tile
     {
-       enum terrain_type t;
-       unsigned char bl;
+       unsigned char t, obj;
     } m[MAP_TILES][MAP_TILES];
 
     int nx, ny, last_w, last_h;
 };
 
-void terrain_init(struct terrain_map *map);
+int terrain_init(const char *path, struct terrain_map *map);
 void terrain_update(struct terrain_map *map);
 int terrain_render(const struct terrain_map *map, const struct camera *cam);
-void terrain_block_update(const struct util_rect *dim, bool alive, void *p);
 
-extern struct sprite grass_sprite;
+enum
+{
+    SIDEWALK,
+    ROOF1,
+    ROOF2,
+    BUILDING1,
+
+    MAX_TERRAIN_SPRITES
+};
+
+extern struct sprite terrain_sprites[MAX_TERRAIN_SPRITES];
 
 #ifdef __cplusplus
 }
diff --git a/src/terrain/src/init.c b/src/terrain/src/init.c
new file mode 100644
index 0000000..88140d8
--- /dev/null
+++ b/src/terrain/src/init.c
@@ -0,0 +1,154 @@
+#include <terrain.h>
+#include <ctype.h>
+#include <errno.h>
+#include <limits.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static int read_token(FILE *const f, char *const s, const size_t n)
+{
+    uint8_t c;
+    size_t i = 0;
+
+    while (fread(&c, sizeof c, 1, f))
+    {
+        if (isspace(c))
+        {
+            if (i)
+                break;
+            else
+                continue;
+        }
+        else if (!isalnum(c))
+        {
+            fprintf(stderr, "%s: invalid character %" PRIx8 " at offset %ld\n",
+                __func__, c, ftell(f));
+            return -1;
+        }
+        else if (i + 1 >= n)
+        {
+            fprintf(stderr, "%s: exceeded maximum token size %zu\n",
+                __func__, n);
+            return -1;
+        }
+
+        s[i++] = c;
+    }
+
+    if (!i)
+    {
+        fprintf(stderr, "%s: feof=%d, ferror=%d\n", __func__, feof(f),
+            ferror(f));
+        return -1;
+    }
+
+    s[i] = '\0';
+    return 0;
+}
+
+static int read_num(FILE *const f, char *s, const size_t n,
+    unsigned *const out, const int base, const int limit)
+{
+    if (read_token(f, s, n))
+        return -1;
+
+    errno = 0;
+
+    char *end;
+    const unsigned long value = strtoul(s, &end, base);
+
+    if (errno)
+    {
+        fprintf(stderr, "%s: strtoul(3): %s\n", __func__, strerror(errno));
+        return -1;
+    }
+    else if (*end)
+    {
+        fprintf(stderr, "%s: invalid number %s\n", __func__, s);
+        return -1;
+    }
+    else if (value > limit)
+    {
+        fprintf(stderr, "%s: %lu exceeds maximum range %d\n", __func__, value,
+            limit);
+        return -1;
+    }
+
+    *out = value;
+    return 0;
+}
+
+static int read_dec(FILE *const f, unsigned *const out)
+{
+    char s[sizeof "65535"];
+
+    return read_num(f, s, sizeof s, out, 10, UINT16_MAX);
+}
+
+static int read_hex(FILE *const f, unsigned *const out)
+{
+    char s[sizeof "0000"];
+
+    return read_num(f, s, sizeof s, out, 16, UINT16_MAX);
+}
+
+static int read_dimensions(FILE *const f, unsigned *const w, unsigned *const h)
+{
+    if (read_dec(f, w) || read_dec(f, h))
+        return -1;
+    else if (*w > MAP_TILES || *h > MAP_TILES)
+    {
+        fprintf(stderr, "%s: map size (%ux%u) exceeded, max %dx%d\n",
+            __func__, *w, *h, MAP_TILES, MAP_TILES);
+        return -1;
+    }
+
+    return 0;
+}
+
+static int read_map(FILE *const f, const unsigned w, const unsigned h,
+    struct terrain_map *const map)
+{
+    for (unsigned j = 0; j < h; j++)
+        for (unsigned i = 0; i < w; i++)
+        {
+            unsigned tile;
+
+            if (read_hex(f, &tile))
+                return -1;
+
+            map->m[j][i].t = tile;
+            map->m[j][i].obj = tile >> 8;
+        }
+
+    return 0;
+}
+
+int terrain_init(const char *const path, struct terrain_map *const map)
+{
+    int ret = -1;
+    FILE *const f = fopen(path, "rb");
+    unsigned w, h;
+
+    if (!f)
+    {
+        fprintf(stderr, "%s: fopen(3): %s\n", __func__, strerror(errno));
+        goto end;
+    }
+    else if (read_dimensions(f, &w, &h) || read_map(f, w, h, map))
+        goto end;
+
+    ret = 0;
+
+end:
+    if (f && fclose(f))
+    {
+        fprintf(stderr, "%s: fclose(3): %s\n", __func__, strerror(errno));
+        ret = -1;
+    }
+
+    return ret;
+}
diff --git a/src/terrain/src/render.c b/src/terrain/src/render.c
new file mode 100644
index 0000000..de354d2
--- /dev/null
+++ b/src/terrain/src/render.c
@@ -0,0 +1,109 @@
+#include <terrain.h>
+#include <camera.h>
+#include <gfx.h>
+#include <util.h>
+#include <ctype.h>
+#include <errno.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct sprite terrain_sprites[MAX_TERRAIN_SPRITES];
+
+static int render_tile(const struct terrain_tile *const t, const short x,
+    const short y)
+{
+    static const struct tile
+    {
+        const struct sprite *s;
+        int start, end;
+    } tiles[] =
+    {
+        {
+            .s = &terrain_sprites[ROOF1],
+            .start = ROOF1_START,
+            .end = ROOF1_END
+        },
+
+        {
+            .s = &terrain_sprites[ROOF2],
+            .start = ROOF2_START,
+            .end = ROOF2_END
+        }
+    };
+
+    for (size_t i = 0; i < sizeof tiles / sizeof *tiles; i++)
+    {
+        const struct tile *const rt = &tiles[i];
+
+        if (t->t >= rt->start && t->t <= rt->end)
+        {
+            sprite_get_or_ret(s, -1);
+
+            if (sprite_clone(rt->s, s))
+            {
+                fprintf(stderr, "%s: sprite_clone failed\n", __func__);
+                return -1;
+            }
+
+            const unsigned char pos = t->t - rt->start;
+            const short tx = pos % TERRAIN_SZ, ty = pos / TERRAIN_SZ;
+
+            s->x = x;
+            s->y = y;
+            s->w = TERRAIN_SZ;
+            s->h = TERRAIN_SZ;
+            s->u = tx * TERRAIN_SZ;
+            s->v = ty * TERRAIN_SZ;
+
+            const int ret = sprite_sort(s);
+
+            if (ret)
+                fprintf(stderr, "%s: sprite_sort failed\n", __func__);
+
+            return ret;
+        }
+    }
+
+    fprintf(stderr, "%s: unknown tile %#hhx\n", __func__, t->t);
+    return -1;
+}
+
+int terrain_render(const struct terrain_map *const map,
+    const struct camera *const cam)
+{
+    const int start_x = abs(cam->x / TERRAIN_SZ),
+        start_y = abs(cam->y / TERRAIN_SZ);
+
+    const int remx = cam->x % TERRAIN_SZ,
+        remy = cam->y % TERRAIN_SZ;
+
+    int nx = map->nx, ny = map->ny;
+
+    if (abs(remx))
+        nx++;
+
+    if (abs(remy))
+        ny++;
+
+    struct m
+    {
+        size_t i;
+        long p;
+    };
+
+    for (struct m x = {.i = start_x, .p = remx};
+            x.i < nx + start_x; x.i++, x.p += TERRAIN_SZ)
+        for (struct m y = {.i = start_y, .p = remy};
+            y.i < ny + start_y; y.i++, y.p += TERRAIN_SZ)
+        {
+            const struct terrain_tile *const t = &map->m[y.i][x.i];
+
+            if (render_tile(t, x.p, y.p))
+                return -1;
+        }
+
+    return 0;
+}
diff --git a/src/terrain/src/terrain.c b/src/terrain/src/terrain.c
deleted file mode 100644
index 3e70a52..0000000
--- a/src/terrain/src/terrain.c
+++ /dev/null
@@ -1,132 +0,0 @@
-#include <terrain.h>
-#include <camera.h>
-#include <gfx.h>
-#include <util.h>
-#include <stddef.h>
-#include <stdlib.h>
-#include <string.h>
-
-struct sprite grass_sprite;
-
-void terrain_update(struct terrain_map *const map)
-{
-    if (map->last_w != screen_w)
-    {
-        const int extra = !!(screen_w % TERRAIN_SZ);
-
-        map->nx = screen_w / TERRAIN_SZ + extra;
-        map->last_w = screen_w;
-    }
-
-    if (map->last_h != screen_h)
-    {
-        const int extra = !!(screen_h % TERRAIN_SZ);
-
-        map->ny = screen_h / TERRAIN_SZ + extra;
-        map->last_h = screen_h;
-    }
-}
-
-struct block
-{
-    size_t x0, x1, y0, y1;
-};
-
-void terrain_block_update(const struct util_rect *const dim, const bool alive,
-    void *const p)
-{
-    const struct block b =
-    {
-        .x0 = dim->x / TERRAIN_SZ,
-        .x1 = (dim->x + dim->w) / TERRAIN_SZ,
-        .y0 = dim->y / TERRAIN_SZ,
-        .y1 = (dim->y + dim->h) / TERRAIN_SZ
-    };
-
-    for (size_t x = b.x0; x <= b.x1; x++)
-        for (size_t y = b.y0; y <= b.y1; y++)
-            for (size_t i = 0; i < 2; i++)
-                for (size_t j = 0; j < 2; j++)
-                {
-                    const struct util_rect sub =
-                    {
-                        .x = x * TERRAIN_SZ + i * (TERRAIN_SZ / 2),
-                        .y = y * TERRAIN_SZ + j * (TERRAIN_SZ / 2),
-                        .w = TERRAIN_SZ / 2,
-                        .h = TERRAIN_SZ / 2
-                    };
-
-                    if (util_collision(dim, &sub))
-                    {
-                        const enum
-                        {
-                            NO_SUB = 0,
-                            UPPER_LEFT = 1 << 0,
-                            UPPER_RIGHT = 1 << 1,
-                            LOWER_LEFT = 1 << 2,
-                            LOWER_RIGHT = 1 << 3,
-                            ALL_BLOCKS = UPPER_LEFT | UPPER_RIGHT
-                                | LOWER_LEFT | LOWER_RIGHT
-                        } sub = 1 << (i + j * 2);
-
-                        struct terrain_map *const map = p;
-                        unsigned char *const bl = &map->m[y][x].bl;
-
-                        *bl = alive ? *bl | sub : *bl & ~sub;
-                    }
-                }
-}
-
-int terrain_render(const struct terrain_map *const map,
-    const struct camera *const cam)
-{
-    const int start_x = abs(cam->x / TERRAIN_SZ),
-        start_y = abs(cam->y / TERRAIN_SZ);
-
-    const int remx = cam->x % TERRAIN_SZ,
-        remy = cam->y % TERRAIN_SZ;
-
-    int nx = map->nx, ny = map->ny;
-
-    if (abs(remx))
-        nx++;
-
-    if (abs(remy))
-        ny++;
-
-    struct m
-    {
-        size_t i;
-        long p;
-    };
-
-    for (struct m x = {.i = start_x, .p = remx};
-            x.i < nx + start_x; x.i++, x.p += TERRAIN_SZ)
-        for (struct m y = {.i = start_y, .p = remy};
-            y.i < ny + start_y; y.i++, y.p += TERRAIN_SZ)
-        {
-            const struct terrain_tile *const t = &map->m[y.i][x.i];
-
-            sprite_get_or_ret(s, -1);
-
-            switch (t->t)
-            {
-                case TERRAIN_TYPE_GRASS:
-                    if (sprite_clone(&grass_sprite, s))
-                        return -1;
-
-                    break;
-            }
-
-            s->x = x.p;
-            s->y = y.p;
-            sprite_sort(s);
-        }
-
-    return 0;
-}
-
-void terrain_init(struct terrain_map *const map)
-{
-    *map = (const struct terrain_map){0};
-}
diff --git a/src/terrain/src/update.c b/src/terrain/src/update.c
new file mode 100644
index 0000000..8b8eed3
--- /dev/null
+++ b/src/terrain/src/update.c
@@ -0,0 +1,20 @@
+#include <terrain.h>
+
+void terrain_update(struct terrain_map *const map)
+{
+    if (map->last_w != screen_w)
+    {
+        const int extra = !!(screen_w % TERRAIN_SZ);
+
+        map->nx = screen_w / TERRAIN_SZ + extra;
+        map->last_w = screen_w;
+    }
+
+    if (map->last_h != screen_h)
+    {
+        const int extra = !!(screen_h % TERRAIN_SZ);
+
+        map->ny = screen_h / TERRAIN_SZ + extra;
+        map->last_h = screen_h;
+    }
+}