[Solved] Error opening a shader file

john_god

I'm havin g the same problem has in this "thread":http://developer.qt.nokia.com/forums/viewthread/10751/ (since it 's solved I started a new one). Copying the shader files to the working directory works for me, but the resource solution fails. I add the shader files has resources (to a file.qrc) and then used

@QGLShader *vertex_shader = new QGLShader(QGLShader::Vertex, this);
if (!vertex_shader->compileSourceFile(":/vshader.vert"))
{
qDebug()<<"Error vertex";
}

QGLShader: Unable to open file ":/vshader.vert"
Error vertex @
Also if use shader files has resources will they not be embbed in the final executable file ? So how it would be possible then for compileSourceFile() to open them ?

lgeyer

Did you add the resource file to your .pro file?
How does your resource file look like? Have you specified any prefixes?
Can you open ":/vshader.vert" using QFile?

john_god

pro file:
@RESOURCES +=
DesktopOpenGLTeste.qrc@

resource file:
@<RCC>
<qresource prefix="/new/prefix1">
<file>graphGL/fshader.frag</file>
<file>graphGL/vshader.vert</file>
</qresource>
</RCC>@

can't open the file:
@QFile file(":/graphGL/vshader.vert");

if (file.open(QIODevice::ReadOnly&#41;&#41; // if file exists reads from file
{
    qDebug()<<"Open file Ok";
}
else //if file does not exists
{
    qDebug()<<"Open file fail";
}@

Also like this ":/vshader.vert" fails to. If I use "vshader.vert" it opens the file, since I copy the shader file to the working directory

lgeyer

As supposed you have to set resource prefix to "/new/prefix1", so the correct path is ":/new/prefix1/graphGL/vshader.vert". Set the prefix to "/" if you want to access the file as ":/graphGL/vshader.vert".

john_god

Thank you. That was the problem, it's solved now :)

HelpINeedSomebody

I'm having the same problem, but i dont understand a shit about that. Can anyone explain me step by step what i have to do? Thx fornhelping me if u do!

HelpINeedSomebody

I'm having the same problem, but i dont understand a shit about that. Can anyone explain me step by step what i have to do? Thx fornhelping me if u do!