Map renderer

1 files changed, 33 insertions, 0 deletions

diff --git a/src/map.c b/src/map.c
new file mode 100644
index 0000000..55fc470
--- /dev/null
+++ b/src/map.c
@@ -0,0 +1,33 @@
+#include <stdint.h>
+
+#include "vga.h"
+#include "data.h"
+
+#include "map.h"
+
+static const uint8_t *cmap;
+
+void map_init(const uint8_t map[])
+{
+    cmap = map;
+}
+
+void map_render()
+{
+    const uint8_t *tiles = binary_tiles_start;
+    Rect src = { 0, 0, 160, 48 };
+    Rect dst = { 0, 0, 8, 8 };
+
+    for (uint8_t y = 0; y < MAP_H; y++)
+        for (uint8_t x = 0; x < MAP_W; x++)
+        {
+            dst.x = x * MAP_TILE_W;
+            dst.y = y * MAP_TILE_H + MAP_OFFS_Y;
+
+            uint8_t t = cmap[x + y * MAP_W];
+            src.x = (t % MAP_TILESET_COLS) * MAP_TILE_W;
+            src.y = (t / MAP_TILESET_COLS) * MAP_TILE_H;
+
+            blitrc(binary_tiles_start, &src, &dst);
+        }
+}