flush all webgl commands before the renderer is completely destroyed. This ensures that all commands are processed in a timely fashion (especially in browsers with multi-process or multi-threaded graphics architectures like chrome). Noteably, this ensures that gl textures are actually deleted around the same time that the renderer is destroyed.

Revert "Trying to fix additive blending in v3" ...

Changing blendModes to what they should be.

fix for SCREEN

Trying to fix additive blending in v3

added removeItems; added unit tests; replaced uses of original splice with removeItems

added pre and post render events to renderers

Track textures in renderer to ensure they are all deleted properly

Ensure no program stays active in GPU memory

moved roundPixels property to system renderer

fixed typo in webgl renderer. updated renderTexture example

WebGLRenderer: clean up texture event listeners ...

On destruction remove event listeners from all BaseTextures in the
cache. Closes pixijs/pixi.js#1968.

fix some doc issues; fixes #2066

Merge pull request #2045 from LibertyGlobal/cleanup_fixes ...

Add calls to super destructors and other extra cleanup work.

Revert unneccessary changes from our code base

Add calls to super destructors and other extra cleanup work.

Massive documentation update; fixes many issues. ...

Issues fixed by these documentation updates:

- #1973, fixed filter and BitmapText property docs
- #1908, fixed type reference links
- #1856, fixed name of MeshShader

uuid is a misnomer, this is not universal, but it is unique in the scope of pixi ...

Added deprecation for uuid

Expose drawModes like blendModes ...

This separates the pixi contant value from the GL constant value. Even
though right now they *should* be the same, if there are platform
differences, or changes in the future ours will always work this way.

minor jshint fixes

properly handle context restore; fixes #1788

fixed extends doc issue

fix #1727 move viewport resize

resize gl viewport in webgl; fixes #1712

reset drawCount each render call; fixes #1661

find webGL resize issue

Fixed some dodgey updates that made it in.. ...

Not sure how that got uploaded, sorry bout that!

webGL tweaks

set default render target when created

fix bug where rendertarget isn't set right

pass clear property to renderDisplayObject function