Issues for 1.9.0

• New features
  • No Cgo on Windows!
    • You can build and run Ebiten games without C compilers on Windows! (Issue 171)
  • Metal on macOS
    • Now Ebiten uses Metal instead of OpenGL on macOS. (Issue 621)
  • Performance improvement
    • e.g. Speed improvement by simplifying shaders (Issue 762, Issue 812)
    • e.g. Memory usage at Ogg decoding was significantly reduced (Issue 733)
• New APIs
  • Graphics
    • func (i *Image) SubImage(r image.Rectangle) image.Image: specifies a part of an image. This replaces DrawImageOptions's SourceRect.
    • func (img *Image) Set(x, y int, clr color.Color): sets a pixel at the specified position on an image. Now *ebiten.Image implements the standard's draw.Image interface.
    • Address: represents whether the texture is repeated at DrawTriangles.
• Deprecated APIs
  • Graphics
    • DrawImageOptions's SourceRect: Use (*Image).SubImage instead.
• Bug fix
  • Monitor issues
    • e.g. The window was sometimes not opened in the current monitor (Issue 829)
  • Several mobile issues
    • e.g. Strange lines on an Xperia phone (Issue 622)
    • e.g. Crash when creating a very small image on old iOS devices (Issue 810)
  • Go 1.12 issues
    • e.g. OpenAL crashes (Oto Issue 65)