QGLShaderProgram works on Debug mode, fails on running in Release.

[escobar]

I'm loosing my mind trying to imagine what the hell I'm missing.

This is my first time with OpenGL with Qt and I wanna use custom shaders, all seems to work properly on Debug mode but in Release

bool __thiscall QGLShaderPrivate::create(void): Could not create shader of type 1.
Vertex Shader Error "" 
bool __thiscall QGLShaderPrivate::create(void): Could not create shader of type 2.
Fragment Shader Error "" 
Shader Program Linker Error ""

bool __thiscall QGLShaderPrivate::create(void): Could not create shader of type 1.
Vertex Shader Error "" 
bool __thiscall QGLShaderPrivate::create(void): Could not create shader of type 2.
Fragment Shader Error "" 
Shader Program Linker Error ""

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PS. I forget to say that this errors are shown in the console but the app doesn't crash, it just doesn't work properly.


Thanks in advance for any help!

[ChrisW67]

How about sharing some information about what your code is doing to trigger this warning from the Qt internals.
Or whether the fault occurs inside an IDE or in a standalone deployed environment

[saman_artorious]

Your shader program has not been linked yet. That's why you receive the warning in the console.

[escobar]

Thank you both!

About the test both were made using the IDE but in deployment Debug runs fine and Release seems to have the same problems (but obviously I don't get that console messages).

Here is my loading routine (pretty basic):

void MyGLWidget::loadShader(QString vshader, QString fshader)
{
    if(ShaderProgram)
        {
        ShaderProgram->release();
        ShaderProgram->removeAllShaders();
        }
    else ShaderProgram = new QGLShaderProgram;
 
    if(VertexShader)
        {
        delete VertexShader;
        VertexShader = NULL;
        }
 
    if(FragmentShader)
        {
        delete FragmentShader;
        FragmentShader = NULL;
        }
 
    std::cout << "loadShader "<<vshader.toStdString()<<" "<<fshader.toStdString()<<std::endl;
    // load and compile vertex shader
    QFileInfo vsh(vshader);
    if(vsh.exists())
        {
        VertexShader = new QGLShader(QGLShader::Vertex);
        if(VertexShader->compileSourceFile(vshader))
            ShaderProgram->addShader(VertexShader);
        else qWarning() << "Vertex Shader Error" << VertexShader->log();
        }
    else qWarning() << "Vertex Shader source file " << vshader << " not found.";
 
    // load and compile fragment shader
    QFileInfo fsh(fshader);
    if(fsh.exists())
        {
        FragmentShader = new QGLShader(QGLShader::Fragment);
        if(FragmentShader->compileSourceFile(fshader))
            ShaderProgram->addShader(FragmentShader);
        else qWarning() << "Fragment Shader Error" << FragmentShader->log();
        }
    else qWarning() << "Fragment Shader source file " << fshader << " not found.";
 
    if(!ShaderProgram->link())
        {
        qWarning() << "Shader Program Linker Error" << ShaderProgram->log();
        }
    else
        ShaderProgram->bind();
}

void MyGLWidget::loadShader(QString vshader, QString fshader)
{
    if(ShaderProgram)
        {
        ShaderProgram->release();
        ShaderProgram->removeAllShaders();
        }
    else ShaderProgram = new QGLShaderProgram;

    if(VertexShader)
        {
        delete VertexShader;
        VertexShader = NULL;
        }

    if(FragmentShader)
        {
        delete FragmentShader;
        FragmentShader = NULL;
        }

    std::cout << "loadShader "<<vshader.toStdString()<<" "<<fshader.toStdString()<<std::endl;
    // load and compile vertex shader
    QFileInfo vsh(vshader);
    if(vsh.exists())
        {
        VertexShader = new QGLShader(QGLShader::Vertex);
        if(VertexShader->compileSourceFile(vshader))
            ShaderProgram->addShader(VertexShader);
        else qWarning() << "Vertex Shader Error" << VertexShader->log();
        }
    else qWarning() << "Vertex Shader source file " << vshader << " not found.";

    // load and compile fragment shader
    QFileInfo fsh(fshader);
    if(fsh.exists())
        {
        FragmentShader = new QGLShader(QGLShader::Fragment);
        if(FragmentShader->compileSourceFile(fshader))
            ShaderProgram->addShader(FragmentShader);
        else qWarning() << "Fragment Shader Error" << FragmentShader->log();
        }
    else qWarning() << "Fragment Shader source file " << fshader << " not found.";

    if(!ShaderProgram->link())
        {
        qWarning() << "Shader Program Linker Error" << ShaderProgram->log();
        }
    else
        ShaderProgram->bind();
}

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And the problem is shown in the IDE for Release mode:

bool __thiscall QGLShaderPrivate::create(void): Could not create shader of type 1.
Vertex Shader Error "" 
bool __thiscall QGLShaderPrivate::create(void): Could not create shader of type 2.
Fragment Shader Error "" 
Shader Program Linker Error "" 
GPU:  "GeForce GTX 560/PCIe/SSE2" 
OpenGL:  "2.1.2" 
GLSL:  "1.20 NVIDIA via Cg compiler"

bool __thiscall QGLShaderPrivate::create(void): Could not create shader of type 1.
Vertex Shader Error "" 
bool __thiscall QGLShaderPrivate::create(void): Could not create shader of type 2.
Fragment Shader Error "" 
Shader Program Linker Error "" 
GPU:  "GeForce GTX 560/PCIe/SSE2" 
OpenGL:  "2.1.2" 
GLSL:  "1.20 NVIDIA via Cg compiler"

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Thanks in advance.

[saman_artorious]

Would you click Projects and see whether "Shadow Build" is ticked. If it is, remove it. Now build again and run in release mode.

[escobar]

That's even more strange... if I disable Shadow Build it doesn't run:

The program has unexpectedly finished. ...Test3.exe exited with code -1073741515

Edit: I found that this means that is missing some libs, it happens since disabling shadow build it is placed in another directory, after putting that dlls there I have the same "bool __thiscall QGLShaderPrivate::create(void): Could not create shader of type" error.

So that didn't solve nothing but thank you for your time anyway.

[saman_artorious]

Would you upload your shader programs in a different way. Add vertext.sh and fragment.sh to your src. Then try linking them this way as below:

//#version 130
 
precision mediump float;
 
uniform mat4 mvpMatrix;
 
attribute vec4 vertex;
attribute float color;
 
varying float varyingColor;
 
void main(void)
{
    varyingColor = color;
    gl_Position = mvpMatrix * vertex;
}

//#version 130

precision mediump float;

uniform mat4 mvpMatrix;

attribute vec4 vertex;
attribute float color;

varying float varyingColor;

void main(void)
{
    varyingColor = color;
    gl_Position = mvpMatrix * vertex;
}

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fragment shader has the same format, you know it. Then do this in the code:

initCommon();
 
    shaderProgram.addShaderFromSourceFile(QGLShader::Vertex, ":/vertexShader.vsh");
 
    shaderProgram.addShaderFromSourceFile(QGLShader::Fragment, ":/fragmentShader.fsh");
 
    if(!shaderProgram.link())
    {
        exit(1);
    }

initCommon();

    shaderProgram.addShaderFromSourceFile(QGLShader::Vertex, ":/vertexShader.vsh");

    shaderProgram.addShaderFromSourceFile(QGLShader::Fragment, ":/fragmentShader.fsh");

    if(!shaderProgram.link())
    {
        exit(1);
    }

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initCommon() is:

void GlWidget::initCommon()
{
    //qglClearColor(QColor(Qt::black));
    glEnable(GL_DEPTH_TEST);
    glEnable(GL_CULL_FACE);
 
    glEnable(GL_BLEND);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}

void GlWidget::initCommon()
{
    //qglClearColor(QColor(Qt::black));
    glEnable(GL_DEPTH_TEST);
    glEnable(GL_CULL_FACE);

    glEnable(GL_BLEND);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}

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check this method and let us know about the result.

PS: don't forget to upload your shaders to your resources.

[escobar]

No luck, also I tried to load from "./a.vert" "./a.frag" it founds the files but they aren't created properly.



It looks that the problem is during the compilation not on loading.

compileSourceCode(code) doesn't work neither on Release but works on Debug.

[escobar]

I fixed it... just by updating to Qt 5.1.1