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  1. Qt
  2. QTBUG-2917

Using glColor to set the color for QGLWidget::renderText() doesn't work well when registering a display list

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Details

    • Bug
    • Resolution: Out of scope
    • P4: Low
    • Some future release
    • 4.4.3
    • GUI: OpenGL
    • None

    Description

      The documentation of QGLWidget::renderText() says that one should call glColor*() to set the text color before calling it. This works as expected during normal execution, but it doesn't work if the whole sequence is recorded into a display list.

      The problem is that qt_gl_draw_text() (in qgl.cpp) uses glGetFloatv() to read the current color and store it into the painter's pen. But glGetFloatv() cannot be compiled into the display list. So, while registering a display list, glGetFloatv() is not recorded but it is instead executed immediately, returning whatever color is currently set into the GL context..

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            hhartz Henrik Hartz (closed Nokia identity) (Inactive)
            admin Administrator
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              Resolved:

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