Double Buffer

[^NyAw^]

Hi,

Paint what you want to display on a pixmap and in the paint event simply paint the pixmap on the widget.

I'm trying to use 20 widgets that have to display 25 images per second. I think that OpenGL will be the best selection, so I will only have to take the image from the buffer, convert it to pixmap and bind to a OpenGL texture(I'm novice on OpenGL use).

Thanks,

[^NyAw^]

Hi,

I'm having linking errors using OpenGL calls inside my code.

I'm using Visual Studio .NET 2003 and Qt 4.3

I included the QtOpenGL module.

[wysota]

Any details about the error?

[^NyAw^]

LPR error LNK2019: sÃ*mbolo externo __imp__glMatrixMode@4 sin resolver al que se hace referencia en la función "public: virtual void __thiscall QMatroxGLWidget::initializeGL(void)" (?initializeGL@QMatroxGLWidget@@UAEXXZ)

I get similar link errors for every OpenGL call that I'm using.
I have the "QtOpenGLd4.lib" on linker options.

Thanks,

[wysota]

Ok, but do you have OpenGL libraries linked as well?

[^NyAw^]

Hi,

Ok, but do you have OpenGL libraries linked as well?

Really don't know. How can I know it and how to do it?

Thanks,

[^NyAw^]

Hi,

Well, I have to install OpenGL SDK. What a mistake.

My question now is:
Is there any Windows generic OpenGL libraries or have I to use my manufacturer ones? If I use my manufacturer ones, then If I want to use the application on another machine with ATI display device, there will be a problem.

Thanks,

[^NyAw^]

Hi,

Well, getting GLUT installed it works.

Thank you for replies.

Another question:
I'm getting images as 8 bit image without any format. Is QImage the only way to get this image to be used in the OpenGL widget?
Image Buffer -> QImage -> QPixmap -> OpenGL Texture

Is there any best way?

Thanks,

[wysota]

QGLWidget::convertToGLFormat()

[^NyAw^]

Hi,

Thanks. Now I have to learn a little OpenGL, only to show an image.

Thanks,