glTexImage3D crashes in QT

Following is part of the code. There is no problem when compiling, but it crashes when executed. And it breaks in the line of g开发者_开发技巧lTexImage3D. Qt version 4.5.3, and class "opengl" is inherited from QGLWidget.

void opengl::initializeGL()
{
    GLenum err = glewInit();
    create_volumetexture();
}

void opengl::create_volumetexture()
{   
    int w = 256, h = 256, d = 225;
    size_t size = w * h * d;

    if (dataRGBA)
    {
        delete dataRGBA;
        dataRGBA=NULL;
    }
    dataRGBA=new GLubyte[4*size];
    for (int i=0; i<size; i++)
    {
        dataRGBA[4*i]=200;
        dataRGBA[4*i+1]=0;
        dataRGBA[4*i+2]=0;
        dataRGBA[4*i+3]=100;
    }

    glGenTextures(1, &volume_texture);
    // bind 3D texture target
    glBindTexture(GL_TEXTURE_3D, volume_texture);
    glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_BORDER);

    glPixelStorei(GL_UNPACK_ALIGNMENT,1);
    glTexImage3D(GL_TEXTURE_3D_EXT, 0, GL_RGBA, w, h, d, 1, /*GL_LUMINANCE*/GL_RGBA, GL_UNSIGNED_BYTE,dataRGBA);

}

You gave a non-zero value to the border parameter, but the buffer allocated for that doesn't account for it, so glTexImage3D does a buffer reading overrun.

Also d is not a power of two so there you got another problem. You can use glTexImage3D with a null pointer for data to initialize the texture and glTexSubImage3D to fill it with the actual content – the data passed to glTexSubImage may also be in non-power of 2 format (but the texture itself must be initialized with power of 2 dimensions… and borders then, too).