1 [![Continuous-integration](https://github.com/Samsung/thorvg/actions/workflows/actions.yml/badge.svg)](https://github.com/Samsung/thorvg/actions/workflows/actions.yml)
2 [![Gitter](https://badges.gitter.im/thorvg/community.svg)](https://gitter.im/thorvg/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
7 <img width="500" height="346" src="https://github.com/Samsung/thorvg/blob/master/res/thorvg_card2.png">
10 ThorVG is a platform-independent portable library for drawing vector-based scene and animation. It's an open-source software that is freely used by a variety of software platforms and applications. ThorVG provides neat and easy APIs, its library has no dependencies and keeps cheat and super compact size. It serves as the vector graphics engine for Tizen OS that powers many products. <br />
12 The following list shows primitives that are supported by ThorVG: <br />
13 - Shapes: Line, Arc, Curve, Path, Polygon, ...
14 - Filling: Solid, Linear and Radial Gradient
15 - Scene Graph & Affine Transformation (translation, rotation, scale, ...)
16 - Stroking: Width, Join, Cap, Dash
17 - Composition: Blending, Masking, Path Clipping, ...
18 - Pictures: SVG, PNG, Bitmap, ...
20 <img width="930" height="473" src="https://github.com/Samsung/thorvg/blob/master/res/example_primitives.png">
23 Your program could call neat TVG APIs while switching drawing context If you have your own drawing engine. During the API calls, ThorVG serializes drawing commands among the volatile paints' nodes then performs synchronous/asynchronous rendering using own backend raster engines. ThorVG supports vector images such as SVG, also expand supporting other popular formats on demand. On the rendering, it could spawn intermediate frame-buffers for compositing scenes only when it's necessary. The next figure shows you a brief strategy on how to use ThorVG on your system.<br />
26 <img width="900" height="288" src="https://github.com/Samsung/thorvg/blob/master/res/example_flow.png">
31 - [Building ThorVG](#building-thorvg)
32 - [Meson Build](#meson-build)
33 - [Quick Start](#quick-start)
35 - [Practices](#practices)
38 - [Examples](#examples)
40 - [ThorVG Viewer](#thorvg-viewer)
41 - [SVG to PNG](#svg-to-png)
42 - [API Bindings](#api-bindings)
43 - [Issues or Feature Requests](#issues-or-feature-requests)
48 ThorVG supports [meson](https://mesonbuild.com/) build system.
51 Install [meson](http://mesonbuild.com/Getting-meson.html) and [ninja](https://ninja-build.org/) if not already installed.
53 Run meson to configure ThorVG:
57 Run ninja to build & install ThorVG:
59 ninja -C build install
61 [Back to contents](#contents)
65 ThorVG renders vector shapes to a given canvas buffer. The following is a quick start to show you how to use the basic APIs.
67 First, you should initialize the ThorVG engine:
70 tvg::Initializer::init(tvg::CanvasEngine::Sw, 0); //engine method, thread count
73 Then you should prepare an empty canvas for drawing on it:
76 static uint32_t buffer[WIDTH * HEIGHT]; //canvas target buffer
78 auto canvas = tvg::SwCanvas::gen(); //generate a canvas
79 canvas->target(buffer, WIDTH, WIDTH, HEIGHT, tvg::SwCanvas::ARGB8888); //buffer, stride, w, h, Colorspace
82 Next you can draw multiple shapes on the canvas:
85 auto rect = tvg::Shape::gen(); //generate a shape
86 rect->appendRect(50, 50, 200, 200, 20, 20); //define it as a rounded rectangle (x, y, w, h, rx, ry)
87 rect->fill(100, 100, 100, 255); //set its color (r, g, b, a)
88 canvas->push(move(rect)); //push the rectangle into the canvas
90 auto circle = tvg::Shape::gen(); //generate a shape
91 circle->appendCircle(400, 400, 100, 100); //define it as a circle (cx, cy, rx, ry)
93 auto fill = tvg::RadialGradient::gen(); //generate a radial gradient
94 fill->radial(400, 400, 150); //set the radial gradient geometry info (cx, cy, radius)
96 tvg::Fill::ColorStop colorStops[2]; //gradient colors
97 colorStops[0] = {0.0, 255, 255, 255, 255}; //1st color values (offset, r, g, b, a)
98 colorStops[1] = {1.0, 0, 0, 0, 255}; //2nd color values (offset, r, g, b, a)
99 fill->colorStops(colorStops, 2); //set the gradient colors info
101 circle->fill(move(fill)); //set the circle fill
102 canvas->push(move(circle)); //push the circle into the canvas
106 This code generates the following result:
109 <img width="416" height="411" src="https://github.com/Samsung/thorvg/blob/master/res/example_shapes.png">
112 You can also draw you own shapes and use dashed stroking:
115 auto path = tvg::Shape::gen(); //generate a path
116 path->moveTo(199, 34); //set sequential path coordinates
117 path->lineTo(253, 143);
118 path->lineTo(374, 160);
119 path->lineTo(287, 244);
120 path->lineTo(307, 365);
121 path->lineTo(199, 309);
122 path->lineTo(97, 365);
123 path->lineTo(112, 245);
124 path->lineTo(26, 161);
125 path->lineTo(146, 143);
128 path->fill(150, 150, 255, 255); //path color
130 path->stroke(3); //stroke width
131 path->stroke(0, 0, 255, 255); //stroke color
132 path->stroke(tvg::StrokeJoin::Round); //stroke join style
133 path->stroke(tvg::StrokeCap::Round); //stroke cap style
135 float pattern[2] = {10, 10}; //stroke dash pattern (line, gap)
136 path->stroke(pattern, 2); //set the stroke pattern
138 canvas->push(move(path)); //push the path into the canvas
142 The code generates the following result:
145 <img width="300" height="300" src="https://github.com/Samsung/thorvg/blob/master/res/example_path.png">
148 Now begin rendering & finish it at a particular time:
155 Then you can acquire the rendered image from the buffer memory.
157 Lastly, terminate the engine after its usage:
160 tvg::Initializer::term(tvg::CanvasEngine::Sw);
162 [Back to contents](#contents)
167 ThorVG supports SVG (Scalable Vector Graphics) rendering through its own SVG interpreter. It satisfies the [SVG Tiny Specification](https://www.w3.org/TR/SVGTiny12/)
168 in order to keep it lightweight, so it's useful for the embedded systems. Among the SVG Tiny specs, unsupported features in the ThorVG are the following:
176 The following code snippet shows how to draw SVG image using ThorVG:
179 auto picture = tvg::Picture::gen(); //generate a picture
180 picture->load("tiger.svg"); //load SVG file
181 canvas->push(move(picture)); //push the picture into the canvas
187 <img width="300" height="300" src="https://github.com/Samsung/thorvg/blob/master/res/example_tiger.png">
190 [Back to contents](#contents)
195 ThorVG is integrated into the [Tizen](https://www.tizen.org) platform as the vector graphics engine. It's being used for vector primitive drawings
196 and scalable image contents such as SVG and Lottie Animation among the Tizen powered products.
199 <img width="798" height="285" src="https://github.com/Samsung/thorvg/blob/master/res/example_tizen.png">
202 [Back to contents](#contents)
206 We're also building a [Rive](https://rive.app/) port which supports Rive Animation run through the ThorVG backend. Rive is a brand new animation platform
207 that supports fancy, user interactive vector animations. For more details see [Rive-Tizen](https://github.com/rive-app/rive-tizen) on [Github](https://github.com/rive-app/).
210 <img width="600" height="324" src="https://github.com/Samsung/thorvg/blob/master/res/example_rive.gif">
213 [Back to contents](#contents)
217 There are various examples available in `thorvg/src/examples`, to help you understand ThorVG APIs.
219 To execute these examples, you can build them with the following meson option:
221 meson -Dexamples=true . build
223 Note that these examples require the EFL `elementary` package for launching. If you're using Linux-based OS, you can easily
224 install this package from your OS distribution server. Otherwise, please visit the official [EFL page](https://enlightenment.org/) for more information.
226 [Back to contents](#contents)
231 [ThorVG viewer](https://samsung.github.io/thorvg.viewer) supports immediate rendering through your browser. You can drag & drop SVG files on the page
232 and see the rendering result on the spot.
234 [Back to contents](#contents)
238 ThorVG provides an executable `svg2png` converter which generates a PNG file from an SVG file.
240 To use `svg2png`, you must turn on this feature in the build option:
242 meson -Dtools=svg2png . build
244 Alternatively, you can add the `svg2png` value to the `tools` option in `meson_option.txt`. The build output will be located in `{builddir}/src/bin/svg2png/`.
246 Examples of the usage of the `svg2png`:
249 svg2png [svgFileName] [Resolution] [bgColor]
253 $ svg2png input.svg 200x200
254 $ svg2png input.svg 200x200 ff00ff
256 [Back to contents](#contents)
260 Our main development APIs are written in C++ but ThorVG also provides API bindings for C.
262 [Back to contents](#contents)
265 ## Issues or Feature Requests
266 For support please reach us in [Gitter](https://gitter.im/thorvg/community).