Try new approach for rendering

[kozmo]

Currently, we need to render everything from back to front and that stopped us from changing rendering order (f.e. to batch primitives with the same texture). We also need to manually sort every instances. This 'new' approach tries to make it not required.

[kozmo]

(In [3715]) * Added experimental OpenGL renderer to test new rendering path refs #556

[kozmo]

(In [3716]) * Fixed warnings and error on gcc refs #556

[kozmo]

(In [3717]) * Fixed small bug regarding outlines refs #556

[kozmo]

(In [3720]) * Added colored overlays for SDL render backend .

• Reworked z-value scaling computation for OpenGL experimental render backend .
• Added support for colored overlays as well as semi-transparent instances for OpenGL experimental render backend .
• Reverted layer drawing order for OpenGL experimental
• Fixed small bug that caused improper deinitialization of render backend .
• Changed GLCompressImages value type from int to boolean. refs #556

[kozmo]

(In [3720]) * Added colored overlays for SDL render backend .

• Reworked z-value scaling computation for OpenGL experimental render backend .
• Added support for colored overlays as well as semi-transparent instances for OpenGL experimental render backend .
• Reverted layer drawing order for OpenGL experimental
• Fixed small bug that caused improper deinitialization of render backend .
• Changed GLCompressImages value type from int to boolean. refs #556

[kozmo]

(In [3720]) * Added colored overlays for SDL render backend .

• Reworked z-value scaling computation for OpenGL experimental render backend .
• Added support for colored overlays as well as semi-transparent instances for OpenGL experimental render backend .
• Reverted layer drawing order for OpenGL experimental
• Fixed small bug that caused improper deinitialization of render backend .
• Changed GLCompressImages value type from int to boolean. refs #556

[kozmo]

(In [3721]) * Removed unnecessary alpha value for lighting as well as alpha reference for alpha test

• Removed appropriate fields in light editor
• Reworked light model to be compatible with new render backend
• Changed layer z offset computation for new render backend to use more precisely part of depth buffer as it's not linear
• Added the ability for guichan to create atlas from its images on runtime - this is only applicable when using its image loader (see engine/python/fife/extensions/pychan/compat.py) refs #556

[kozmo]

(In [3721]) * Removed unnecessary alpha value for lighting as well as alpha reference for alpha test

• Removed appropriate fields in light editor
• Reworked light model to be compatible with new render backend
• Changed layer z offset computation for new render backend to use more precisely part of depth buffer as it's not linear
• Added the ability for guichan to create atlas from its images on runtime - this is only applicable when using its image loader (see engine/python/fife/extensions/pychan/compat.py) refs #556

[kozmo]

(In [3726]) * Fixed MinGW compilation refs #556

[prock]

closed