Import LDTK maps

game/BUILD

@@ -2,8 +2,8 @@ load("@bazel_skylib//rules:run_binary.bzl", "run_binary")
 
 cc_library(
     name = "game",
-    srcs = glob(["*.c"]) + [":art/game_demo_sprites.c"],
+    srcs = glob(["*.c"]) + [":art/game_demo_sprites.c", ":map/game_map.c"],
-    hdrs = glob(["*.h"]) + [":art/game_demo_sprites.h"],
+    hdrs = glob(["*.h"]) + [":art/game_demo_sprites.h", ":map/game_map.h"],
     visibility = ["//visibility:public"],
     deps = ["//device:device", "//sys:sys"]
 )
@@ -21,3 +21,15 @@ run_binary(
     outs = [":art/game_demo_sprites.c"],
     tool = "//pytools:spritesheet",
 )
+
+run_binary(
+    name = "game_map",
+    args = [
+        "game_map",
+        "$(location :map/crocparty.ldtk)",
+        "$(location :map/game_map.c)",
+    ],
+    srcs = [":map/crocparty.ldtk"],
+    outs = [":map/game_map.c"],
+    tool = "//pytools:mapdata"
+)

game/map/game_map.h

@@ -0,0 +1,5 @@
+#ifndef CROCPARTY_GAME_MAP_H
+#define CROCPARTY_GAME_MAP_H
+
+#endif
+

pytools/BUILD

@@ -19,3 +19,13 @@ py_binary(
     ],
     visibility = ["//visibility:public"],
 )
+
+py_binary(
+    name = "mapdata",
+    srcs = ["mapdata.py", "shared.py"],
+    deps = [
+        requirement("pillow"),
+        requirement("Jinja2"),
+    ],
+    visibility = ["//visibility:public"],
+)

pytools/mapdata.py

@@ -0,0 +1,90 @@
+import sys
+import json
+import shared
+
+TEMPLATE = """
+// generated code! be nice
+#include "sys/sys.h"
+
+sys_i32 {{map_name}}_player_start_x = {{player_start.0}};
+sys_i32 {{map_name}}_player_start_y = {{player_start.1}};
+
+sys_maptile {{map_name}}_data[{{width * height}}] = { {{ tiles|join(",") }} };
+sys_map {{map_name}} = {
+    .tiles={{map_name}}_data,
+    .width={{width}},
+    .height={{height}},
+};
+""".lstrip()
+
+def main(map_name, fname_ldtk, fname_c):
+    width, height, tiles, player_start = load_mapdata(fname_ldtk)
+
+    with open(fname_c, "wt") as output:
+        output.write(
+            shared.templates.from_string(TEMPLATE).render(
+                map_name=map_name,
+                player_start=player_start,
+                tiles=tiles,
+                width=width,
+                height=height,
+            )
+        )
+
+
+def load_mapdata(fname_ldtk):
+    sparse_tiles = {}
+    player_start_xy = None
+    with open(fname_ldtk, "rt") as f:
+        data = json.load(f)
+        for level in data["levels"]:
+            level_x = level["worldX"] // 8
+            level_y = level["worldY"] // 8
+            for layer in level["layerInstances"]:
+                w = layer["__cWid"]
+                h = layer["__cHei"]
+
+                if layer["__identifier"] == "vague":
+                    # for right now I use the vague layer to assign tiles
+                    for x, y, ix in annot_xy(layer["intGridCsv"], w, h):
+                        if ix == 0:
+                            continue
+                        sparse_tiles[level_x + x, level_y + y] = ix
+                
+                if layer["__identifier"] == "entities":
+                    for e in layer["entityInstances"]:
+                        x, y = e["__grid"]
+                        player_start_xy = (level_x + x, level_y + y)
+    
+    assert player_start_xy is not None, "player start not found"
+    x_min = 0
+    y_min = 0
+    assert not any(x for (x, _) in sparse_tiles if x < x_min), "level can't be left of (0, 0)"
+    assert not any(y for (_, y) in sparse_tiles if y < y_min), "level can't be up from (0, 0)"
+    width = max(x for (x, _) in sparse_tiles) + 1
+    height = max(y for (_, y) in sparse_tiles) + 1
+    dense_tiles = []
+    for y in range(height):
+        for x in range(width):
+            k = (x, y)
+            if k in sparse_tiles:
+                dense_tiles.append(sparse_tiles[k])
+            else:
+                dense_tiles.append(0)
+
+    return width, height, dense_tiles, player_start_xy
+
+
+
+
+def annot_xy(lst, w, h):
+    assert len(lst) == w * h
+    for y in range(h):
+        for x in range(w):
+            yield x, y, lst[y * w + x]
+
+
+if __name__ == "__main__":
+    assert len(sys.argv) == 4, \
+        "there must be three args (map name, src ldtk, out c)"
+    main(sys.argv[1], sys.argv[2], sys.argv[3])

pytools/spritesheet.py

@@ -16,7 +16,7 @@ sys_sprite {{spritesheet_name}}_data[{{n_sprites}}] = {
     {%- endfor %}
 };
 sys_spritesheet {{spritesheet_name}} = {
-    .sprites=&{{spritesheet_name}}_data,
+    .sprites={{spritesheet_name}}_data,
     .width={{width}},
     .height={{height}},
 };

sys/sys_data.h

@@ -10,6 +10,7 @@
 
 typedef int32_t sys_i32;
 typedef uint8_t sys_color;
+typedef uint8_t sys_maptile;
 typedef uint32_t sys_screen_color;
 typedef uint64_t sys_glyph;
 typedef struct { 
@@ -20,6 +21,11 @@ typedef struct {
     uint32_t width;
     uint32_t height;
 } sys_spritesheet;
+typedef struct {
+    sys_maptile* tiles;
+    uint32_t width;
+    uint32_t height;
+} sys_map;
 
 sys_screen_color sys_make_screen_color(uint8_t r, uint8_t g, uint8_t b);