Accelerating Vector Graphics Rendering using the Graphics Hardware Pipeline

摘要

We describe our successful initiative to accelerate Adobe Illustratorrnwith the graphics hardware pipeline of modern GPUs. Relyingrnon OpenGL 4.4 plus recent OpenGL extensions for advanced blendrnmodes and first-class GPU-accelerated path rendering, we acceleraternthe Adobe Graphics Model (AGM) layer responsible for renderingrnsophisticated Illustrator scenes. Illustrator documents renderrnin either an RGB or CMYK color mode. While GPUs are designedrnand optimized for RGB rendering, we orchestrate OpenGLrnrendering of vector content in the proper CMYK color space andrnaccommodate the 5+ color components required. We support bothrnnon-isolated and isolated transparency groups, knockout, patterns,rnand arbitrary path clipping. We harness GPU tessellation to shadernpaths smoothly with gradient meshes. We do all this and renderrncomplex Illustrator scenes 2 to 6× faster than CPU rendering at FullrnHD resolutions; and 5 to 16× faster at Ultra HD resolutions.