picasso

Copyright (C) 2008 ~ 2025 Zhang Ji Peng ([email protected])

Picasso is a high quality vector graphic rendering library. It has high performance and low footprint. Picasso provides a set of high level 2D graphics API, which can be used to a GUI system, rendering postscript, rendering svg images and so on. It support path, matrix, gradient, pattern, image and truetype font.

Features

• Path Filling, Stroking
• Solid Color, Gradient, Pattern
• Stroke Dashing
• Linecap Butt, Round, Square
• Linejoin Miter, Round, Bevel
• Transform and Matrix
• Filling Rule
• Blur
• Shadow
• Clipping
• Compisiting
• Font and Text
• Image Decoders jpeg, png, webp, gif
• SVG Tiny 1.2
• SVG Animation

How to build

linux:

1. Install cmake above v3.16 on your system
 $ sudo apt install cmake

2. Build project
 ./build_linux.sh
 cd proj
 make

windows:

1. Install cmake above v3.16 on your windows system and register path environment variables.
 c:\> winget install --id Kitware.CMake -e

2. Build project
 build_windows.bat
 cd proj
 

macosx:

1. Install cmake above v3.16 on your system
 $ brew install cmake

2. Build project
 ./build_macosx.sh
 cd proj
 

Quick Start

The following example creates an off-screen canvas, draws a filled rectangle with a radial gradient, and saves the result. It demonstrates the core Picasso workflow: canvas → context → draw → release.

…

The pixel buffer buf now contains the rendered RGBA image and can be passed to any display or image-encoding layer.

Documents

API Reference Documents

Gallery

Alpha Blending & Compositing	SVG Rendering
Alpha blending across multiple overlapping geometry shapes	Full SVG path, gradient, and stroke rendering (Tiger benchmark)

GIS / Map Rendering	Realtime Instrumentation
High-density polyline and label rendering for GIS applications	Arc, gradient, and affine transform compositing for realtime UI