diff options
Diffstat (limited to 'test/snapshot.zig')
| -rw-r--r-- | test/snapshot.zig | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/test/snapshot.zig b/test/snapshot.zig index 5417530d..f1ebd941 100644 --- a/test/snapshot.zig +++ b/test/snapshot.zig @@ -168,15 +168,26 @@ fn runScript(arena: std.mem.Allocator, exe_z: [:0]const u8, script_path: []const for (1..n + 1) |i| try buf.appendSlice(arena, try std.fmt.allocPrint(arena, "line {d}\n", .{i})); try eh.writeFile(try arena.dupeZ(u8, name), buf.items); } else if (std.mem.eql(u8, cmd, "ppmdiag")) { - // the 64x64 diagonal-split test PPM (white/blue) from the old e2e + // The diagonal-split test PPM from the old e2e (white over blue), + // grown to 512x512 with the white half filled by a fixed LCG + // noise. Both halves are load-bearing: the clean edge is what the + // block/sextant glyphs match exactly, the noise is fine enough + // (one source pixel per matcher subcell at this size) that the + // ASCII bitmaps win instead — so the Ascii toggle visibly changes + // the art, which a 64x64 image cannot show (its cells average + // down to flat color and a block always wins). const name = tok.next() orelse return error.BadScript; var ppm: std.ArrayList(u8) = .empty; - try ppm.appendSlice(arena, "P6\n64 64\n255\n"); + try ppm.appendSlice(arena, "P6\n512 512\n255\n"); + var seed: u64 = 12345; var py: usize = 0; - while (py < 64) : (py += 1) { + while (py < 512) : (py += 1) { var px: usize = 0; - while (px < 64) : (px += 1) - try ppm.appendSlice(arena, if (px + py < 64) &[_]u8{ 255, 255, 255 } else &[_]u8{ 0, 0, 255 }); + while (px < 512) : (px += 1) { + seed = seed *% 1103515245 +% 12345; + const v: u8 = @truncate(seed >> 16); + try ppm.appendSlice(arena, if (px + py < 512) &[_]u8{ v, v, v } else &[_]u8{ 0, 0, 255 }); + } } try eh.writeFile(try arena.dupeZ(u8, name), ppm.items); } else if (std.mem.eql(u8, cmd, "dirmk")) { |