15c71f5135
For some characters (eg \r) the returned glyph will have .{.rows = 0, .width=0, .pitch = 0, .buffer = null}. In zig null[0..0] causes a panic rather than returning an empty slice.
33 lines
1 KiB
Zig
33 lines
1 KiB
Zig
// zig build run-example-single-glyph -- B
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const std = @import("std");
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const freetype = @import("freetype");
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pub fn main() !void {
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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defer _ = gpa.deinit();
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const allocator = gpa.allocator();
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var args = try std.process.argsAlloc(allocator);
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defer std.process.argsFree(allocator, args);
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const lib = try freetype.Library.init();
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defer lib.deinit();
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const face = try lib.newFace("upstream/assets/FiraSans-Regular.ttf", 0);
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try face.setCharSize(60 * 48, 0, 50, 0);
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try face.loadChar(args[1][0], .{ .render = true });
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const bitmap = face.glyph().bitmap();
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var i: usize = 0;
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while (i < bitmap.rows()) : (i += 1) {
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var j: usize = 0;
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while (j < bitmap.width()) : (j += 1) {
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const char: u8 = switch (bitmap.buffer().?[i * bitmap.width() + j]) {
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0 => ' ',
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1...128 => ';',
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else => '#',
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};
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std.debug.print("{c}", .{char});
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}
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std.debug.print("\n", .{});
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}
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}
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