From 0831d5bce79008bfa6404f8e8116ae8290442fde Mon Sep 17 00:00:00 2001
From: 3gg <3gg@shellblade.net>
Date: Sat, 24 Jun 2023 18:46:33 -0700
Subject: Isometric Renderer initial commit.

---
 gfx-iso/include/isogfx/isogfx.h | 66 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 gfx-iso/include/isogfx/isogfx.h

(limited to 'gfx-iso/include/isogfx/isogfx.h')

diff --git a/gfx-iso/include/isogfx/isogfx.h b/gfx-iso/include/isogfx/isogfx.h
new file mode 100644
index 0000000..a5f7770
--- /dev/null
+++ b/gfx-iso/include/isogfx/isogfx.h
@@ -0,0 +1,66 @@
+/*
+ * Isometric rendering engine.
+ */
+#pragma once
+
+#include <stdint.h>
+
+typedef struct IsoGfx IsoGfx;
+
+typedef uint8_t Tile;
+typedef uint8_t Channel;
+
+typedef struct Pixel {
+  Channel r, g, b;
+} Pixel;
+
+typedef enum TileDescType {
+  TileFromColour,
+  TileFromFile,
+  TileFromMemory
+} TileDescType;
+
+typedef struct TileDesc {
+  TileDescType type;
+  union {
+    Pixel colour;
+    struct {
+      const char* path;
+    } file;
+    struct {
+      const void* data;
+    } mem;
+  };
+} TileDesc;
+
+typedef struct IsoGfxDesc {
+  int screen_width;
+  int screen_height;
+  int tile_width;
+  int tile_height;
+  int world_width;
+  int world_height;
+  int max_num_tiles; // 0 for an implementation-defined default.
+} IsoGfxDesc;
+
+IsoGfx* isogfx_new(const IsoGfxDesc*);
+
+void isogfx_del(IsoGfx**);
+
+Tile isogfx_make_tile(IsoGfx*, const TileDesc*);
+
+void isogfx_set_tile(IsoGfx*, int x, int y, Tile);
+
+void isogfx_set_tiles(IsoGfx*, int x0, int y0, int x1, int y1, Tile);
+
+void isogfx_pick_tile(
+    const IsoGfx*, double xcart, double ycart, int* xiso, int* yiso);
+
+void isogfx_render(IsoGfx*);
+
+void isogfx_draw_tile(IsoGfx*, int x, int y, Tile);
+
+const Pixel* isogfx_get_screen_buffer(const IsoGfx*);
+
+int isogfx_world_width(const IsoGfx*);
+int isogfx_world_height(const IsoGfx*);
-- 
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