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 ""

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();
}

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"


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;
}

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



initCommon();

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

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

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



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);
}



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.

:confused:

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 :confused: