Mixxx with ANGLE asserts always at startup

[JoergAtGithub]

Bug Description

If I enforce Mixxx 2.4 to run with ANGLE (OpenGL ES), it asserst as following:

warning [Main] QOpenGLShader::compile(Fragment): ERROR: 0:6: '' : No precision specified for (float)
ERROR: 0:7: '' : No precision specified for (float)

warning [Main] *** Problematic Fragment shader source code ***
#ifdef GL_KHR_blend_equation_advanced
#extension GL_ARB_fragment_coord_conventions : enable
#extension GL_KHR_blend_equation_advanced : enable
#endif
#line 1

uniform highp vec4 color;
varying highp float vgradient;
void main()
{
    float minAlpha = 0.5 * color.w;
    float maxAlpha = 0.83 * color.w;
    gl_FragColor = vec4(color.xyz, mix(minAlpha, maxAlpha, max(0.,vgradient)));
}

***
DEBUG ASSERT: "addShaderFromSourceCode( GLShader::Fragment, fragmentShaderCode)" in function void __cdecl mixxx::Shader::load(const class QString &,const class QString &) at C:\Users\Joerg.WORLDWARTWEB\source\repos\JoergAtGithub\mixxx\src\shaders\shader.cpp:24

Version

2.4.0

OS

Windows 11

[daschuer]

Please try to chang the code to that:

  highp float minAlpha = 0.5 * color.w;
  highp float maxAlpha = 0.83 * color.w;

[Swiftb0y]

some for all other shaders too...

[JoergAtGithub]

Yes, this works!

[daschuer]

Cool, would you mind to issue a PR?

[JoergAtGithub]

Will do!