When i run my qml code in embeded device, log info shows that the vertex compile failed. log is below:

QOpenGLShader::compile(Vertex): Compile failed.

• • • Problematic Vertex shader source code ***
      uniform highp vec2 pixelSize;
      uniform highp mat4 qt_Matrix;
      uniform lowp float opacity;

attribute highp vec4 vertex;
attribute highp vec2 multiTexCoord;
attribute highp vec2 vertexOffset;
attribute highp vec2 texCoordOffset;

varying highp vec2 texCoord;
varying lowp float vertexOpacity;

void main()
{
highp vec4 pos = qt_Matrix * vertex;
gl_Position = pos;
texCoord = multiTexCoord;

if (vertexOffset.x != 0.)

{ highp vec4 delta = qt_Matrix[0] * vertexOffset.x; highp vec2 dir = delta.xy * pos.w - pos.xy * delta.w; highp vec2 ndir = .5 * pixelSize * normalize(dir / pixelSize); dir -= ndir * delta.w * pos.w; highp float numerator = dot(dir, ndir * pos.w * pos.w); highp float scale = 0.0; if (numerator < 0.0) scale = 1.0; else scale = min(1.0, numerator / dot(dir, dir)); gl_Position += scale * delta; texCoord.x += scale * texCoordOffset.x; }

if (vertexOffset.y != 0.)

{ highp vec4 delta = qt_Matrix[1] * vertexOffset.y; highp vec2 dir = delta.xy * pos.w - pos.xy * delta.w; highp vec2 ndir = .5 * pixelSize * normalize(dir / pixelSize); dir -= ndir * delta.w * pos.w; highp float numerator = dot(dir, ndir * pos.w * pos.w); highp float scale = 0.0; if (numerator < 0.0) scale = 1.0; else scale = min(1.0, numerator / dot(dir, dir)); gl_Position += scale * delta; texCoord.y += scale * texCoordOffset.y; }

bool onEdge = any(notEqual(vertexOffset, vec2(0.)));
bool outerEdge = all(equal(texCoordOffset, vec2(0.)));
vertexOpacity = onEdge && outerEdge ? 0. : opacity;
}
***
QOpenGLShader::link: "Link Error: Vertex shader is missing.
"
QSGMaterialShader: Shader compilation failed:
"Link Error: Vertex shader is missing.
"
QOpenGLShaderProgram::uniformLocation( pixelSize ): shader program is not linked
QOpenGLShaderProgram::uniformLocation( qt_Matrix ): shader program is not linked
QOpenGLShaderProgram::uniformLocation( opacity ): shader program is not linked

• compiling material: 43ms
  QOpenGLShader::link: "Link Error: Vertex shader is missing.

And the Image antianalising has been set to true, while the Image show nothing but a white-black screen. Code is here:

NQImage

{ source: "qrc:///textRenderTest/background.png" antialiasing: true }