tiny.png.EncodePlan

1pub const Plan = struct {2    input_hash: u64,3    width: i32,4    height: i32,5    image_pixels: usize,6    color: model.Color,7    raw_bytes: usize,8    zlib_bytes: usize,9    output_bytes: usize,10    options: model.Options,11    bounds: Bounds,1213    pub fn inspect(image: model.ImageView, bounds: Bounds, scratch: *Scratch) Error!Plan {14        return inspectRegions(image, bounds, scratch.regions());15    }1617    pub fn inspectRegions(18        image: model.ImageView,19        bounds: Bounds,20        scratch: ScratchRegions,21    ) Error!Plan {22        const image_pixels = try model.pixelCount(image.width, image.height);23        if (image_pixels > bounds.image_pixels) return error.ImagePixelCapacityExceeded;24        const pixel_bytes = try model.pixelByteCount(image.width, image.height);25        if (image.rgba8.len != pixel_bytes) return error.PixelSizeMismatch;26        const color = model.colorForPixels(image.rgba8);27        const row_bytes = try multiplied(@as(usize, @intCast(image.width)), color.bytesPerPixel());28        const raw_bytes = try multiplied(29            try added(row_bytes, 1),30            @as(usize, @intCast(image.height)),31        );32        const zlib_bytes = switch (image.options.compression) {33            .compressed => try measureCompressed(image, color, scratch),34            .stored => try storedBytes(raw_bytes),35        };36        return .{37            .input_hash = model.imageHash(image),38            .width = image.width,39            .height = image.height,40            .image_pixels = image_pixels,41            .color = color,42            .raw_bytes = raw_bytes,43            .zlib_bytes = zlib_bytes,44            .output_bytes = try added(signature_bytes + framed_bytes, zlib_bytes),45            .options = image.options,46            .bounds = bounds,47        };48    }4950    pub fn exactBounds(self: Plan) Bounds {51        return .{ .image_pixels = self.image_pixels };52    }53};

1pub const EncodePlan = encode.Plan;