glDrawPixels issue

[vermarajeev]

http://digitalfanatics.org/projects/...chapter14.html

Follow th link to get an idea

[ntp]

Thanks for the link. I did look at that before but there is nothing specific to glDrawPixels. The examples given are for texture mapping.

I've done this outside of Qt (inside of glut windows) but it is behaving differently here. The real issue is coming up with a way to determine consistently where I should move to (using RasterPos) to get the full image to appear in the QMdiSubWindow via the QGLWidget.

-- Nisha

[ntp]

It was an openGL issue. I forgot to add a

glViewport(0, 0, width, height);

glViewport(0, 0, width, height);

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in my resizeGL() code before:

glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glOrtho(0.0, (double)width, 0.0, (double)height, -1.0, 1.0);
    glMatrixMode(GL_MODELVIEW);

glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glOrtho(0.0, (double)width, 0.0, (double)height, -1.0, 1.0);
    glMatrixMode(GL_MODELVIEW);

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and then the drawing does start in the lower lefthand corner (0,0) as expected.