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PixelFarm

Hardware and Software 2D Rendering Library

  1. Hardware Rendering Technology:

    The library uses OpenGL ES2+ and its Shading Langauge (GLSL) as its hardware-renderer backend.

    a lion cup below is read from svg file=> tessellated and rendered with GLES Painter

    gles2_aa_shader

GLES backend Painter

  1. Software Rendering Technology:

    The library also provides a 'classic' (pure) software renderer.

    It uses a forked version of Agg-Sharp, in side this lib it is called MiniAgg

    Agg-Sharp is the C# port of Anti-Grain Geometry (AGG) version (version 2.4, BSD license)

    and Big thanks go to https://github.com/MatterHackers/agg-sharp

lions

Left: MiniAgg backend Painter vs Right: Gdi+

Agg-based Painter provides a high quality graphics output.

tiger

PixelFarm's Agg (1) vs Chrome (2), Ghost script's Tiger.svg(https://commons.wikimedia.org/wiki/File:Ghostscript_Tiger.svg)

tiger2

Agg's result, bitmap zoom-in to see fine details

The Agg has various customizable scanline rasterizers. You can use its scanline technique it many ways. In this library, for example, It customize the scanline rasterizer to create
lcd-effect subpixel rendering effect (see below), msdf3 texture (see https://github.com/PaintLab/PixelFarm/issues/55) etc.

PixelFarm's Lcd-effect Subpixel Rendering

The library provides a special scanline rasterizer that produces lcd-effect subpixel rendering output. You may need this when you want to make a font-glyph look sharper/easy to read on general computer monitor (96 dpi).

lcd_05

If you look closely, It not just an anti-alias line, it is lcd-effect subpixel rendering antialias line.

lcd_effect_zoom

zoom view of above picture

lcd effect subpixel rendering blends a single color to nearby pixels you can see it not just a simple red or blue line

lcd_07

black on white, lcd-effect

With black line on white background, the output is not just black color, It has many color inside it. Not only line but curves too, below images are lcd-effect on curves of font glyphs.

lcd_08

lcd_09

typography_thanamas

autofit_hfit01

The core library does not provide a text-rendering functions directly.
It provide a 'blank text printer' (abstract) for you.

The library has one example of text printer, see=> PixelFarm.Typography

How to read a font file, layout the glyphs, print to text are special topics. If you are interested, please visit Typography (https://github.com/LayoutFarm/Typography).

The HtmlRenderer example!

Now we can render a high quality graphics, we have a high quality font output too.

Why don't we try to render a Web?

htmlbox_gles_with_selection

HtmlRenderer on GLES2 surface, text are renderered with the Typography, please note the text selection on the Html Surface.

If you are interested in HtmlRenderer, visit here => https://github.com/LayoutFarm/HtmlRenderer,

HOW TO BUILD

see https://github.com/PaintLab/PixelFarm/issues/37

SUB PROJECT ARRANGMENT

see https://github.com/PaintLab/PixelFarm/tree/master/src

License:

The project is based on multiple open-sourced projects (listed below) all using permissive licenses.

A license for a whole project is MIT.

but if you use some part of the code please check each source file's header for the licensing info.

Geometry

BSD, 2002-2005, Maxim Shemanarev, Anti-Grain Geometry - Version 2.4, http://www.antigrain.com

BSD, 2007-2014, Lars Brubaker, agg-sharp, https://github.com/MatterHackers/agg-sharp

ZLIB, 2015, burningmine, CurveUtils. https://github.com/burningmime/curves

Boost, 2010-2014, Angus Johnson, Clipper.

BSD, 2009-2010, Poly2Tri Contributors, https://github.com/PaintLab/poly2tri-cs

SGI, 2000, Eric Veach, Tesselate.

MS-PL, 2018, SVG.NET, https://github.com/vvvv/SVG

MIT, 2018, Rohaan Hamid, https://github.com/rohaanhamid/simplify-csharp

Image Processing

MIT, 2008, dotPDN LLC, Rick Brewster, Chris Crosetto, Tom Jackson, Michael Kelsey, Brandon Ortiz, Craig Taylor, Chris Trevino, and Luke Walker., OpenPDN v 3.36.7 (Paint.NET), https://github.com/rivy/OpenPDN

BSD, 2002-2005, Maxim Shemanarev, Anti-Grain Geometry - Version 2.4, http://www.antigrain.com

MIT, 2016, Viktor Chlumsky, https://github.com/Chlumsky/msdfgen

MIT, 2009-2015, Bill Reiss, Rene Schulte and WriteableBitmapEx Contributors, https://github.com/teichgraf/WriteableBitmapEx

Apache2, 2012, Hernán J. González, https://github.com/leonbloy/pngcs

Apache2, 2010, Sebastian Stehle, .NET Image Tools Development Group. , https://imagetools.codeplex.com/

MIT, 2018, Tomáš Pažourek, Colourful, https://github.com/tompazourek/Colourful

MIT, 2011, Inedo, https://github.com/Inedo/iconmaker

Font

Apache2, 2016-2017, WinterDev, Samuel Carlsson, Sam Hocevar and others, https://github.com/LayoutFarm/Typography

Apache2, 2014-2016, Samuel Carlsson, https://github.com/vidstige/NRasterizer

MIT, 2015, Michael Popoloski, https://github.com/MikePopoloski/SharpFont

The FreeType Project LICENSE (3-clauses BSD style),2003-2016, David Turner, Robert Wilhelm, and Werner Lemberg and others, https://www.freetype.org/

Platforms

MIT, 2015-2015, Xamarin, Inc., https://github.com/mono/SkiaSharp

MIT, 2006-2009, Stefanos Apostolopoulos and other Open Tool Kit Contributors, https://github.com/opentk/opentk

MIT, 2013, Antonie Blom, https://github.com/andykorth/Pencil.Gaming

Demo

MIT, 2017, Wiesław Šoltés, ColorBlender, https://github.com/wieslawsoltes/ColorBlender

BSD, 2015, Darren David darren-code@lookorfeel.com, https://github.com/nobutaka/EasingCurvePresets