first iteration of main.zig

build.zig

@@ -37,8 +37,9 @@ pub fn build(b: *Builder) void {
     // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall.
     const mode = b.standardReleaseOptions();
 
-    const exe = b.addExecutable("microui-demo", null);
+    const exe = b.addExecutable("microui-demo", "src/main.zig");
     exe.linkLibC();
+    exe.addIncludeDir("./src");
     exe.addIncludeDir("./microui-src");
     for (source_files) |source| {
         exe.addCSourceFile(source, &c_args);

src/main.c

@@ -232,7 +232,7 @@ static int text_height(mu_Font font) {
 }
 
 
-int main(int argc, char **argv) {
+int main_old(int argc, char **argv) {
   /* init SDL and renderer */
   SDL_Init(SDL_INIT_EVERYTHING);
   r_init();

src/main.zig

@@ -0,0 +1,45 @@
+const std = @import("std");
+
+const c = @cImport({
+    @cInclude("SDL2/SDL.h");
+    @cInclude("microui.h");
+    @cInclude("renderer.h");
+});
+
+export fn text_width(font: c.mu_Font, text: [*c]const u8, len: c_int) c_int {
+    var actual_len: c_int = len;
+    if (actual_len == -1) {
+        actual_len = @intCast(c_int, std.mem.len(text));
+    }
+
+    return c.r_get_text_width(text, actual_len);
+}
+
+export fn text_height(font: c.mu_Font) c_int {
+    // TODO handle font data?
+    return c.r_get_text_height();
+}
+
+pub fn main() anyerror!void {
+    _ = c.SDL_Init(c.SDL_INIT_EVERYTHING);
+    c.r_init();
+
+    var ctx = try std.heap.c_allocator.create(c.mu_Context);
+    defer std.heap.c_allocator.destroy(ctx);
+
+    c.mu_init(ctx);
+
+    ctx.text_width = text_width;
+    ctx.text_height = text_height;
+
+    while (true) {
+        var e: c.SDL_Event = undefined;
+
+        while (c.SDL_PollEvent(&e) != 0) {
+            switch (e.@"type") {
+                c.SDL_QUIT => std.os.exit(0),
+                else => @panic("fuck"),
+            }
+        }
+    }
+}