otter-render

otter-render is the software renderer behind Otter Shell UI. Colors, surfaces, FreeType, HarfBuzz shaping, image decode, deferred draw commands. otter-ui fills a CommandList. You call quad_renderer.rasterize to paint SHM buffers.

Quick example

const render = @import("otter_render");

const accent = try render.parseColor("#FF5500");
var surface = render.Surface.fromPixels(&pixels, width, height);
surface.clear(render.Color.black);

const font = try render.Font.init(allocator, .{});
defer font.deinit();
font.drawText(&surface, "Hello", .{ .x = 0, .y = 20 }, 16, accent);

Documentation map

Colors and surfaces

Color, Surface, HiDPI scaling, and immediate-mode drawing.

Fonts and text

Font, TextSystem, shaping, bidi, and fallbacks.

Images and animation

Image, sprite sheets, downsampling, and Animation.

Command list

DefaultCommandList, scissor, damage culling, quad_renderer.

Build flags

Flag	Effect
`-Denable_text=false`	Drop FreeType, HarfBuzz, Fontconfig
`-Denable_svg=false`	SVG loads return `error.SvgDisabled`
`-Denable_wide_image_formats=false`	Limit decode to PNG/JPEG

Dependencies

otter-geo, otter-utils, FreeType, HarfBuzz, Fontconfig, zigimg.

Advanced features

Colors and surfaces

⌘I

Getting Started

Libraries

Quick example

Documentation map

Colors and surfaces

Fonts and text

Images and animation

Command list

Build flags

Dependencies

​Quick example

​Documentation map

Colors and surfaces

Fonts and text

Images and animation

Command list

​Build flags

​Dependencies

Quick example

Documentation map

Build flags

Dependencies