phaser v4.0.0-rc.3

This release candidate introduces better pixel art controls, and fixes performance issues related to pixel art options.

Updates since RC2:

New Features

• GameObject#vertexRoundMode added to control vertex pixel rounding on a per-object basis.
  • Options include:
    • "off": Never round vertex positions.
    • "safe": Round vertex positions if the object is "safe": it is rendering with a transform matrix which only affects the position, not other properties such as scale or rotation.
    • "safeAuto" (default): Like "safe", but only if rendering through a camera where roundPixels is enabled.
    • "full": Always round vertex positions. This can cause sprites to wobble if their vertices are not safely aligned with the pixel resolution, e.g. during rotations. This is good for a touch of PlayStation 1 style jank.
    • "fullAuto": Like "full", but only if rendering through a camera where roundPixels is enabled.
  • GameObject#willRoundVertices(camera, onlyTranslated) returns whether vertices should be rounded. In the unlikely event that you need to control vertex rounding even more precisely, you are intended to override this method.
• Blocky filter added. This is similar to Pixelate, but it picks just a single color from the image, preserving the palette of pixel art. You can also configure the pixel width and height, and offset. This is a good option for pixelating a retro game at high resolution, setting up for additional filters such as CRT emulation.

Changes

• WebGL2 canvases are now compatible with the WebGL renderer.
• Optimize multi-texture shader.
  • Shader branching pattern changed to hopefully be more optimal on a wider range of devices.
  • Shader will not request the maximum number of textures if it doesn't need them, improving performance on many mobile devices.
  • Shader no longer performs vertex rounding. This will prevent many situations where a batch was broken up, degrading performance.

Fixes

• WebGLSnapshot and snapshot functions based on it now return the correct pixel, instead of the one above it (or nothing if they're at the top of the image).
• ArcadePhysics#closest() and #furthest() are properly defined (thanks @samme).
• GamepadPlugin.stopListeners and GamepadPlugin.disconnectAll now have guards around them so they won't try to invoke functions on potentially undefined gamepads (thanks @cryonautlex)
• Arcade Physics OverlapCirc() and OverlapRect() error when useTree is false. Fix #7112 (thanks @samme)

Documentation / TypeScript Enhancements

Thanks to the following people:

@ospira @samme @OuttaBounds @raaaahman