Image and warning X3206: implicit truncation of vector type

portoist

Hello,
I am porting my app from QtQuick 1.1 to 2.0 and I have following code:
@
Item {
id: container
width: 61
height: 59
property url bgImage: "qrc:/images/buttons/button1.png"

Image {
    id: __bgImage
    source: container.bgImage
    anchors.top: parent.top; anchors.left: parent.left;
    anchors.topMargin: 4; anchors.leftMargin: -4
    visible: container.state==''
    opacity: container.enabled ? 1.0 : 0.6
}

}
@
Image is displayed fine but I am getting following warning in application output:
@QOpenGLShader::link: "(35,18): warning X3206: implicit truncation of vector type"@
If I comment the source property in the __bgImage, then the warning is gone.
I am running Qt 5.0.1 with Mingw32 on Windows 7. Can anyone tell me what this warning actually means and how to get rid off it? Thanks!

chrisadams

I don't know much about why this warning is emitted, but it happens when the (in this case, default) GLSL shader (and in this case, I assume it's a fragment shader) is compiled. We're getting well out of my area of competence, but I think that there's probably an issue with ANGLE regarding how the GLSL shader is converted to HLSL, which causes an assignment (most likely of a uniform) to a different type, causing an implicit truncation.

Build your Qt with desktop openGL configuration instead of ANGLE, and you should see this go away.

Cheers,
Chris.