freetype: initial import @ 4e2b158

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>

freetype/examples/single_glyph.zig

@@ -0,0 +1,58 @@
+const std = @import("std");
+const freetype = @import("freetype");
+
+const WIDTH = 32;
+const HEIGHT = 24;
+
+fn drawBitmap(bitmap: freetype.Bitmap, x: usize, y: usize) [HEIGHT][WIDTH]u8 {
+    var figure = std.mem.zeroes([HEIGHT][WIDTH]u8);
+    var p: usize = 0;
+    var q: usize = 0;
+    const w = bitmap.width();
+    const x_max = x + w;
+    const y_max = y + bitmap.rows();
+    var i: usize = 0;
+    while (i < x_max - x) : (i += 1) {
+        var j: usize = 0;
+        while (j < y_max - y) : (j += 1) {
+            if (i < WIDTH and j < HEIGHT) {
+                figure[j][i] |= bitmap.buffer()[q * w + p];
+                q += 1;
+            }
+        }
+        q = 0;
+        p += 1;
+    }
+    return figure;
+}
+
+pub fn main() !void {
+    const lib = try freetype.Library.init();
+    defer lib.deinit();
+
+    const face = try lib.newFace("test/assets/FiraSans-Regular.ttf", 0);
+    defer face.deinit();
+
+    try face.setCharSize(40 * 64, 0, 50, 0);
+    try face.loadChar('@', .{ .render = true });
+
+    const glyph = face.glyph;
+    const x = @intCast(usize, glyph.bitmapLeft());
+    const y = HEIGHT - @intCast(usize, glyph.bitmapTop());
+
+    var figure = drawBitmap(glyph.bitmap(), x, y);
+
+    var i: usize = 0;
+    while (i < HEIGHT) : (i += 1) {
+        var j: usize = 0;
+        while (j < WIDTH) : (j += 1) {
+            const char: u8 = switch (figure[i][j]) {
+                0 => ' ',
+                1...128 => ';',
+                else => '#',
+            };
+            std.debug.print("{c}", .{char});
+        }
+        std.debug.print("\n", .{});
+    }
+}