Option to set GLSL ES precision for the whole shader

[aglitchman]

Is your feature request related to a problem? Please describe (REQUIRED): The GLSL ES spec does not define a default float precision for fragment shaders, so Defold have to specify it, and now it is mediump by default.

If you have a large fragment shader and want to use highp everywhere by default, then you have to bloat shader's source code by adding highp prefix everywhere.

Describe the solution you'd like (REQUIRED): Defold's shader compiler should check for the line precision <PRECISIONHERE> float; in the shader's code to not add the line with the precision again, i.e. Defold adds precision mediump float into all fragment shaders.

Describe alternatives you've considered (REQUIRED): We had to add "highp" at almost every line.

[AGulev]

hmm, It seems like we have this logic in the ShaderUtil code. Now I'm not sure if it's outdated issue or bug in this code

[AGulev]

ah, ok. it seems like it is bug

[Jhonnyg]

With the new pipeline you can specify this in the shader, so I’m not sure this issue is needed any more :)

EDIT: I’ll close this once I’ve added the info to the manual on how to set it