Shader compiling error with Nvidia Geforce 1050, driver version 391.35

tracyma

shader works well when use Intel Graphics. I'm wondering how the Qt shader compiler add

#define lowp
#define mediump
#define highp
#line 1

to my fragment shader which may cause the compiling failed.

Vertex shader:

#version 310 es
uniform highp mat4 qt_Matrix;
in highp vec4 qt_Vertex;
in highp vec2 qt_MultiTexCoord0;
out highp vec2 coord;
void main() {
    coord = qt_MultiTexCoord0;
    gl_Position = qt_Matrix * qt_Vertex;
}

Fragment shader:

#version 310 es
in highp vec2 coord;
uniform highp float time;
uniform sampler2D src;
uniform lowp float qt_Opacity;
out lowp vec4 outColor;
void main() {
    lowp float modPart = mod(coord.x, 0.2);
    lowp float solidPart = time * 0.2;

    if ( modPart > solidPart )
        discard;
    else
    {
        lowp vec4 tex = texture(src, coord);
        outColor = tex * qt_Opacity;
    }
}

Error says:

QOpenGLShader::compile(Fragment): 0(1) : error C7573: OpenGL/ES requires precision specifier on this float type (there is no default precision)
0(2) : error C7573: OpenGL/ES requires precision specifier on this float type (there is no default precision)
0(4) : error C7573: OpenGL/ES requires precision specifier on this float type (there is no default precision)
0(5) : error C7573: OpenGL/ES requires precision specifier on this float type (there is no default precision)
0(7) : error C7573: OpenGL/ES requires precision specifier on this float type (there is no default precision)
0(8) : error C7573: OpenGL/ES requires precision specifier on this float type (there is no default precision)
0(14) : error C7573: OpenGL/ES requires precision specifier on this float type (there is no default precision)

*** Problematic Fragment shader source code ***
#version 310 es
#define lowp
#define mediump
#define highp
#line 1
in highp vec2 coord;
uniform highp float time;
uniform sampler2D src;
uniform lowp float qt_Opacity;
out lowp vec4 outColor;
void main() {
    lowp float modPart = mod(coord.x, 0.2);
    lowp float solidPart = time * 0.2;

    if ( modPart > solidPart )
        discard;
    else
    {
        lowp vec4 tex = texture(src, coord);
        outColor = tex * qt_Opacity;
    }
}

***
QQuickCustomMaterialShader: Shader compilation failed:
"0(1) : error C7573: OpenGL/ES requires precision specifier on this float type (there is no default precision)\n0(2) : error C7573: OpenGL/ES requires precision specifier on this float type (there is no default precision)\n0(4) : error C7573: OpenGL/ES requires precision specifier on this float type (there is no default precision)\n0(5) : error C7573: OpenGL/ES requires precision specifier on this float type (there is no default precision)\n0(7) : error C7573: OpenGL/ES requires precision specifier on this float type (there is no default precision)\n0(8) : error C7573: OpenGL/ES requires precision specifier on this float type (there is no default precision)\n0(14) : error C7573: OpenGL/ES requires precision specifier on this float type (there is no default precision)\n"

tracyma

set QT_OpenGL to angle and application attribute to Qt::AA_UseOpenGLES will fix this.