http://bugs.freedesktop.org/show_bug.cgi?id=25164
Summary: glBitmap directly to the front buffer when using double- buffering has no effect Product: Mesa Version: 7.6 Platform: x86 (IA32) OS/Version: Linux (All) Status: NEW Severity: normal Priority: medium Component: Mesa core AssignedTo: mesa3d-dev@lists.sourceforge.net ReportedBy: s...@iastate.edu Writing with glBitmap directly to the front buffer when using double-buffering seems to have no effect. Other routines such as GL_QUADS seem to work. Configuration: * ATI radeon X1400 (R520), but the same behavior is observed with LIBGL_ALWAYS_INDIRECT=1 * Fedora 12-packaged mesa-libGL-7.6-0.13. I am using the front buffer directly for a mouse tracker and don't want to have to fully redraw to avoid excessive slowness when run over remote X. Code example: glDrawBuffer(GL_FRONT); /* Erase background first */ glColor3f(0.0,0.0,0.0); glBegin(GL_QUADS); glVertex2i(poslinex,posliney); glVertex2i(poslinex+poslinewidth,posliney); glVertex2i(poslinex+poslinewidth,posliney+poslineheight); glVertex2i(poslinex,posliney+poslineheight); glEnd(); /* draw a character */ glColor3f(1.0,1.0,1.0); glRasterPos2i(poslinex,posliney+poslineheight); glutBitmapCharacter(TextFont,'f'); /* thin wrapper over glBitmap() */ glFlush(); glDrawBuffer(GL_BACK); Expected result: draw an 'f' over a black rectangle Actual result: Black rectangle but no 'f'. Removing the glDrawBuffer() calls and adding glutSwapBuffers() at the end solves the problem and the expected result is achieved. -- Configure bugmail: http://bugs.freedesktop.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug. ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Mesa3d-dev mailing list Mesa3d-dev@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mesa3d-dev