From 04af7fbd7891b4be883be8231d8fc0ae11a763e7 Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Tue, 13 Jun 2023 23:29:50 +0100
Subject: Map renderer

---
 src/Makefile |  8 +++++++-
 src/data.h   |  2 ++
 src/main.c   |  4 +++-
 src/map.c    | 33 +++++++++++++++++++++++++++++++++
 src/map.h    | 17 +++++++++++++++++
 5 files changed, 62 insertions(+), 2 deletions(-)
 create mode 100644 src/map.c
 create mode 100644 src/map.h

(limited to 'src')

diff --git a/src/Makefile b/src/Makefile
index 4852b93..50b1179 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -6,8 +6,11 @@ LDFLAGS := -s
 IMGS		:= $(wildcard ../data/*.png)
 IMG_OBJS 	:= $(IMGS:../data/%.png=%.o)
 
+MAPS		:= ../data/stage.json
+MAP_OBJS	:= $(MAPS:../data/%.json=%.o)
+
 SRCS	:= $(wildcard *.c)
-OBJS	:= $(SRCS:.c=.o) $(IMG_OBJS) palette.o
+OBJS	:= $(SRCS:.c=.o) $(IMG_OBJS) palette.o $(MAP_OBJS)
 
 all: $(BIN)
 
@@ -23,6 +26,9 @@ palette.o: ../data/sprites.png
 $(IMG_OBJS): %.o: ../data/%.png
 	../tools/pngpix.py $< $@
 
+$(MAP_OBJS): %.o: ../data/%.json
+	../tools/map.py $< $@
+
 clean:
 	rm -f $(BIN) *.o Makefile.deps
 
diff --git a/src/data.h b/src/data.h
index d7f2f4c..8d4b2e3 100644
--- a/src/data.h
+++ b/src/data.h
@@ -7,4 +7,6 @@ extern const uint8_t binary_sprites_start[];
 extern const uint8_t binary_tiles_start[];
 extern const uint8_t binary_font_start[];
 
+extern const uint8_t binary_stage_start[];
+
 #endif /* _DATA_H */
diff --git a/src/main.c b/src/main.c
index be248d3..9985159 100644
--- a/src/main.c
+++ b/src/main.c
@@ -7,6 +7,7 @@
 #include "keyb.h"
 #include "vga.h"
 #include "text.h"
+#include "map.h"
 #include "data.h"
 
 /* disable paging because our int handlers are written in C */
@@ -36,7 +37,8 @@ int main(int argc, char *argv[])
     blit_erase(0);
     wait_vsync();
 
-    put_text(10, 10, "TESTING! 1234567890* ()^_");
+    map_init(binary_stage_start);
+    map_render();
 
     blit_update();
 
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);
+        }
+}
diff --git a/src/map.h b/src/map.h
new file mode 100644
index 0000000..7c08fe5
--- /dev/null
+++ b/src/map.h
@@ -0,0 +1,17 @@
+#ifndef _MAP_H
+#define _MAP_H
+
+#define MAP_TILE_W 8
+#define MAP_TILE_H 8
+
+#define MAP_W 40
+#define MAP_H 23
+
+#define MAP_OFFS_Y 16
+
+#define MAP_TILESET_COLS 20
+
+void map_init(const uint8_t map[]);
+void map_render();
+
+#endif /* _MAP_H */
-- 
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