Skia, by contrast, provides world-class text rendering out-of-the-box. It leverages FreeType on the backend, manages glyph caching, supports subpixel positioning, and even offers DirectWrite on Windows. For paths, Skia uses a high-quality tessellator or can fall back to a stencil-and-cover algorithm for extremely smooth, antialiased curves. The difference in development effort is staggering: a complete vector drawing app can be built in days with Skia, while the same from scratch in OpenGL would be a master’s thesis.
Skia completely eliminates this burden. The developer issues a sequence of drawRect , drawPath , and drawImage calls. Skia records these into an internal display list, automatically coalescing operations with similar state, reordering draws to reduce texture binds, and triangulating paths on the fly. For example, drawing 1,000 colored circles in Skia results in a few large batches of geometry sent to the GPU, whereas a naive OpenGL implementation would issue 1,000 separate draw calls. This automatic batching is a monumental productivity and performance advantage for 2D interfaces. opengl default vs skia
Skia, in contrast, is a portability engine. The same Skia code compiles and runs on Windows (using Direct3D or OpenGL), macOS/iOS (using Metal), Linux (Vulkan/OpenGL), Android (Vulkan/OpenGL), and even in web browsers via WebAssembly with WebGL. Skia’s backend abstraction means the developer never touches a platform-specific API. For cross-platform applications like Chrome, Flutter, or Figma’s desktop client, this is invaluable. The difference in development effort is staggering: a
OpenGL, in its default form (especially when referring to the core profile without immediate mode), is a procedural API designed to interact directly with the GPU. Its model is a state machine: you set the current color, texture, matrix, shader program, and blending mode, then issue vertices. The GPU then executes a fixed sequence of operations: vertex shading, primitive assembly, rasterization, fragment shading, and per-sample operations. This pipeline is exceptionally powerful and flexible, capable of rendering complex 3D scenes, but it demands that the developer manage every minute detail—from vertex buffer objects (VBOs) and shader compilation to texture atlases and depth testing. There is no inherent concept of a "rectangle," "circle," or "paragraph of text"; these must be built from triangles and textures. Skia records these into an internal display list,