fix name

Signed-off-by: Tim Culverhouse <tim@timculverhouse.com>

build.zig.zon

@@ -1,5 +1,5 @@
 .{
-    .name = "salmon",
+    .name = "vaxis",
     // This is a [Semantic Version](https://semver.org/).
     // In a future version of Zig it will be used for package deduplication.
     .version = "0.0.0",

src/Image.zig

@@ -76,8 +76,9 @@ test "image" {
             .y_pixel = 1,
         },
         .{ .path = "vaxis.png" },
+        1,
     );
     defer img.deinit();
-    try testing.expectEqual(1, img.cell_width);
-    try testing.expectEqual(1, img.cell_height);
+    try testing.expectEqual(200, img.cell_width);
+    try testing.expectEqual(197, img.cell_height);
 }

src/image/Kitty.zig

@@ -0,0 +1,74 @@
+const std = @import("std");
+const math = std.math;
+const testing = std.testing;
+const zigimg = @import("zigimg");
+const png = zigimg.png;
+
+const Window = @import("../Window.zig");
+const Winsize = @import("../Tty.zig").Winsize;
+
+const Kitty = @This();
+
+/// the decoded image
+img: zigimg.Image,
+
+/// unique identifier for this image
+id: u32,
+
+/// width of the image, in cells
+cell_width: usize,
+/// height of the image, in cells
+cell_height: usize,
+
+/// initialize a new image
+pub fn init(
+    alloc: std.mem.Allocator,
+    winsize: Winsize,
+    src: []const u8,
+    id: u32,
+) !Kitty {
+    const img = switch (src) {
+        .path => |path| try zigimg.Image.fromFilePath(alloc, path),
+        .mem => |bytes| try zigimg.Image.fromMemory(alloc, bytes),
+    };
+    // cell geometry
+    const pix_per_col = try math.divCeil(usize, winsize.x_pixel, winsize.cols);
+    const pix_per_row = try math.divCeil(usize, winsize.y_pixel, winsize.rows);
+
+    const cell_width = math.divCeil(usize, img.width, pix_per_col) catch 0;
+    const cell_height = math.divCeil(usize, img.height, pix_per_row) catch 0;
+
+    return Image{
+        .img = img,
+        .cell_width = cell_width,
+        .cell_height = cell_height,
+        .id = id,
+    };
+}
+
+pub fn deinit(self: *Image) void {
+    self.img.deinit();
+}
+
+pub fn draw(self: *Image, win: Window, placement_id: u32) !void {
+    try win.writeImage(win.x_off, win.y_off, self, placement_id);
+}
+
+test "image" {
+    const alloc = testing.allocator;
+    var img = try init(
+        alloc,
+        .{
+            .rows = 1,
+            .cols = 1,
+            .x_pixel = 1,
+            .y_pixel = 1,
+        },
+        .{ .path = "vaxis.png" },
+        0,
+        .kitty,
+    );
+    defer img.deinit();
+    try testing.expectEqual(200, img.cell_width);
+    try testing.expectEqual(197, img.cell_height);
+}

src/image/image.zig

@@ -0,0 +1,42 @@
+const std = @import("std");
+const math = std.math;
+const testing = std.testing;
+const zigimg = @import("zigimg");
+
+const Winsize = @import("../Tty.zig").Winsize;
+const Window = @import("../Window.zig");
+
+const Kitty = @import("Kitty.zig");
+
+pub const Image = union(enum) {
+    kitty: Kitty,
+
+    pub const Protocol = enum {
+        kitty,
+        // TODO: sixel, full block, half block, quad block
+    };
+
+    /// initialize a new image
+    pub fn init(
+        alloc: std.mem.Allocator,
+        winsize: Winsize,
+        src: []const u8,
+        id: u32,
+        protocol: Protocol,
+    ) !Image {
+        switch (protocol) {
+            .kitty => {
+                const img = try Kitty.init(alloc, winsize, src, id);
+                return .{ .kitty = img };
+            },
+        }
+    }
+
+    pub fn deinit(self: *Image) void {
+        self.img.deinit();
+    }
+
+    pub fn draw(self: *Image, win: Window, placement_id: u32) !void {
+        try win.writeImage(win.x_off, win.y_off, self, placement_id);
+    }
+};