ANGLE: QOpenGLShader::compile(Fragment): ERROR: 0:3: '' : No precision specified for (float)

[JoergAtGithub]

Bug Description

I just tested the latest Mixxx 2.4 with ANGLE, by setting $env:QT_OPENGL = 'angle'. I got the error messages below at startup:

warning [Main] QOpenGLShader::compile(Fragment): ERROR: 0:3: '' : 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 sampler2D texture;
uniform vec2 repetitions;
varying highp vec2 vTexcoor;
void main()
{
    gl_FragColor = texture2D(texture, fract(vTexcoor * repetitions));
}

***
warning [Main] QOpenGLShaderProgram::uniformLocation(matrix): shader program is not linked
warning [Main] QOpenGLShaderProgram::attributeLocation(position): shader program is not linked
warning [Main] QOpenGLShaderProgram::attributeLocation(texcoor): shader program is not linked
warning [Main] QOpenGLShaderProgram::uniformLocation(texture): shader program is not linked
warning [Main] QOpenGLShaderProgram::uniformLocation(repetitions): shader program is not linked
warning [Main] QOpenGLShader::compile(Fragment): ERROR: 0:3: '' : 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 sampler2D texture;
uniform vec2 repetitions;
varying highp vec2 vTexcoor;
void main()
{
    gl_FragColor = texture2D(texture, fract(vTexcoor * repetitions));
}

***
warning [Main] QOpenGLShaderProgram::uniformLocation(matrix): shader program is not linked
warning [Main] QOpenGLShaderProgram::attributeLocation(position): shader program is not linked
warning [Main] QOpenGLShaderProgram::attributeLocation(texcoor): shader program is not linked
warning [Main] QOpenGLShaderProgram::uniformLocation(texture): shader program is not linked
warning [Main] QOpenGLShaderProgram::uniformLocation(repetitions): shader program is not linked
warning [Main] QOpenGLShader::link: The program must contain objects to form both a vertex and fragment shader.

Version

2.4

OS

Windows 11 + ANGLE

[JoergAtGithub]

Moved the scaling issue to #12608