1 files changed, 53 insertions, 0 deletions
diff --git a/src/farbfeld.zig b/src/farbfeld.zig
new file mode 100644
index 0000000..dbdf338
--- /dev/null
+++ b/src/farbfeld.zig
@@ -0,0 +1,53 @@
+const std = @import("std");
+const Allocator = std.mem.Allocator;
+
+const picasso = @import("root.zig");
+const Rgba = picasso.color.Rgba;
+const Bitmap = picasso.Bitmap;
+
+pub const Image = struct {
+    const Self = @This();
+
+    pub const ReadError = error {
+        InvalidMagicValue,
+        InvalidSize,
+    } || std.Io.Reader.Error || Allocator.Error;
+
+    bitmap: Bitmap(Rgba(16)),
+
+    pub fn read(gpa: Allocator, reader: *std.Io.Reader) ReadError!Self {
+        if (!std.mem.eql(u8, "farbfeld", try reader.takeArray(8))) {
+            return ReadError.InvalidMagicValue;
+        }
+
+        var self: Self = undefined;
+
+        const width = try reader.takeInt(u32, .big);
+        const height = try reader.takeInt(u32, .big);
+
+        self.bitmap = try .init_undefined(gpa, width, height);
+        errdefer self.bitmap.deinit(gpa);
+
+        for (self.bitmap.pixels) |*pixel| {
+            pixel.* = try reader.takeStruct(Rgba(16), .big);
+        }
+
+        return self;
+    }
+
+    pub fn deinit(self: Self, gpa: Allocator) void {
+        self.bitmap.deinit(gpa);
+    }
+};
+
+test "rgb" {
+    const buffer = @embedFile("testing/rgb.ff");
+    var reader: std.Io.Reader = .fixed(buffer);
+    const gpa = std.testing.allocator;
+
+    const image: Image = try .read(gpa, &reader);
+    defer image.deinit(gpa);
+
+    try std.testing.expectEqual(600, image.bitmap.width);
+    try std.testing.expectEqual(450, image.bitmap.height);
+}