From c48ddcecd780f9a92d1123353ed6cc6520fded29 Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Fri, 7 Oct 2022 21:04:30 -0700
Subject: [PATCH] pkg/macos: font draw glyphs

---
 pkg/macos/graphics.zig       |  1 +
 pkg/macos/graphics/point.zig | 10 ++++++++++
 pkg/macos/text/font.zig      | 31 +++++++++++++++++++++++++++++++
 3 files changed, 42 insertions(+)
 create mode 100644 pkg/macos/graphics/point.zig

diff --git a/pkg/macos/graphics.zig b/pkg/macos/graphics.zig
index 690d45e5b..d11870d95 100644
--- a/pkg/macos/graphics.zig
+++ b/pkg/macos/graphics.zig
@@ -3,6 +3,7 @@ pub usingnamespace @import("graphics/affine_transform.zig");
 pub usingnamespace @import("graphics/bitmap_context.zig");
 pub usingnamespace @import("graphics/color_space.zig");
 pub usingnamespace @import("graphics/font.zig");
+pub usingnamespace @import("graphics/point.zig");
 
 test {
     @import("std").testing.refAllDecls(@This());
diff --git a/pkg/macos/graphics/point.zig b/pkg/macos/graphics/point.zig
new file mode 100644
index 000000000..8a440ac28
--- /dev/null
+++ b/pkg/macos/graphics/point.zig
@@ -0,0 +1,10 @@
+const c = @import("c.zig");
+
+pub const Point = extern struct {
+    x: c.CGFloat,
+    y: c.CGFloat,
+
+    pub fn cval(self: Point) c.struct_CGPoint {
+        return @bitCast(c.struct_CGPoint, self);
+    }
+};
diff --git a/pkg/macos/text/font.zig b/pkg/macos/text/font.zig
index 0ffc37015..d0e75e478 100644
--- a/pkg/macos/text/font.zig
+++ b/pkg/macos/text/font.zig
@@ -32,6 +32,22 @@ pub const Font = opaque {
         );
     }
 
+    pub fn drawGlyphs(
+        self: *Font,
+        glyphs: []const graphics.Glyph,
+        positions: []const graphics.Point,
+        context: anytype, // Must be some context type from graphics
+    ) void {
+        assert(positions.len == glyphs.len);
+        c.CTFontDrawGlyphs(
+            @ptrCast(c.CTFontRef, self),
+            glyphs.ptr,
+            @ptrCast([*]const c.struct_CGPoint, positions.ptr),
+            glyphs.len,
+            @ptrCast(c.CGContextRef, context),
+        );
+    }
+
     pub fn copyAttribute(self: *Font, comptime attr: text.FontAttribute) attr.Value() {
         return @intToPtr(attr.Value(), @ptrToInt(c.CTFontCopyAttribute(
             @ptrCast(c.CTFontRef, self),
@@ -64,4 +80,19 @@ test {
         &glyphs,
     ));
     try testing.expect(glyphs[0] > 0);
+
+    // Draw
+    {
+        const cs = try graphics.ColorSpace.createDeviceGray();
+        defer cs.release();
+        const ctx = try graphics.BitmapContext.create(null, 80, 80, 8, 80, cs);
+        defer ctx.release();
+
+        var pos = [_]graphics.Point{.{ .x = 0, .y = 0 }};
+        font.drawGlyphs(
+            &glyphs,
+            &pos,
+            ctx,
+        );
+    }
 }