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- 5. _K_n_o_w_n__P_r_o_b_l_e_m_s__a_n_d__W_o_r_k_a_r_o_u_n_d_s
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- For OpenGL issues on all platforms, please consult the
- OpenGL man pages. Known bugs and machine-dependencies have
- been documented there, so that they are readily available
- during development and debugging.
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- 5.1 _I_R_I_X__6_._5_._2
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- 5.1.1 _I_n_f_i_n_i_t_e_R_e_a_l_i_t_y
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- 5.1.1.1 _B_U_G _4_6_8_2_6_9: _C_h_a_n_g_i_n_g _x_t_e_r_m _f_o_n_t _t_o _u_n_r_e_a_d_a_b_l_e
- _m_a_n_g_l_e_s _w_i_n_d_o_w _i_d_s Setting the font to unreadable in an
- xterm will scramble the window IDs. Once this happens, Xsgi
- must be restarted.
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- 5.1.1.2 _C_a_v_e_a_t_:__T_e_x_t_u_r_e__B_o_r_d_e_r_s We had hoped to support
- texture borders, but the problems involved appear to be
- intractable. Therefore we recommend using other techniques.
- (A common solution is to clamp to the texture edge, rather
- than to the border.)
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- 5.1.1.3 _C_a_v_e_a_t_:__S_t_e_r_e_o__v_i_d_e_o__f_o_r_m_a_t_s__c_h_a_n_g_e_d Stereo format
- timing has changed in order to eliminate dark banding
- associated with newer Crystal Eyes stereo glasses. If you
- use stereo formats with projection systems, be aware that
- recalibration will be necessary.
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- 5.1.2 _R_e_a_l_i_t_y_E_n_g_i_n_e
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- 5.1.3 _M_a_x__I_m_p_a_c_t_,__H_i_g_h__I_m_p_a_c_t_,__S_o_l_i_d__I_m_p_a_c_t_,__M_X_I_,__S_S_I_,__S_I
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- +o SGIX_pixel_texture extension hangs graphics (465927).
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- +o Showcase has problems with 1920x1080 mode (490413).
-
- +o TexSubImage with negative offsets can crash Impact gfx
- (563903).
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- +o Lines drawn on a polygon using the polygon offset
- extension are not visible if the polygon is
- perpendicular to the line of sight (559924).
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- +o GL_REPLACE texture environment mode implemented as
- GL_MODULATE on systems with hardware texturing
- (570115).
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- +o Color-indexed anti-aliased lines are drawn without
- anti-aliasing in 0% coverage color (579120).
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- +o Fractional pixel zooms above 24x are rounded to the
- nearest integer (580128).
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- +o Wide lines and polygons are rendered with anti-aliasing
- only if the environment variables SOFT_WIDE_AA_LINES
- and SOFT_AA_POLYS are defined respectively (610159).
-
- +o OpenGL polygon offset bias affects all geometry when
- enabled by GL_POLYGON_OFFSET_EXT or
- GL_POLYGON_OFFSET_FILL (622574).
-
- 5.1.4 _O_2
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- +o Full-screen stereo images flicker (524817).
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- +o Power-up stereo-in-a-window fails on O2 (545312).
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- +o Polygon offset 1.1 line & point problems (556001).
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- +o glDrawPixels and glReadPixels do not work in stereo
- (544935).
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- 5.1.5 _G_R_2_,__G_R_3_,__E_x_t_r_e_m_e
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- +o Screen Capture is noisy on Power Indigo2 (409356).
-
- +o Moving Maya's graph editor, while playing back an
- animation causes graphics to crash (538855).
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- 5.1.6 _I_n_d_y_,__X_L
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- +o Graphics crash after quitting mediaplayer when run
- remotely on 8-bit Indy (492899).
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- +o Z-buffering problem on 24-bit Indy, using 'decal'
- polygons (431154).
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- 5.2 _I_R_I_X__6_._5_._8
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- 5.2.1 _I_n_f_i_n_i_t_e_R_e_a_l_i_t_y
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- 5.2.2 _R_e_a_l_i_t_y_E_n_g_i_n_e
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- 5.2.3 _M_a_x__I_m_p_a_c_t_,__H_i_g_h__I_m_p_a_c_t_,__S_o_l_i_d__I_m_p_a_c_t_,__M_X_I_,__S_S_I_,__S_I
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- 5.2.4 _O_2
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- 5.2.5 _G_R_2_,__G_R_3_,__E_x_t_r_e_m_e
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- 5.2.6 _O_c_t_a_n_e_2__V_P_r_o
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- +o The current raster position texture coordinates, and
- any possible texture sampling, are ignored in
- glDrawPixels() (644229).
-
- +o glDrawBuffer(GL_FRONT_AND_BACK) does not actually draw
- to both buffers in some visuals; it may draw only to
- the front buffer. However, glClear() will work in both
- buffers. (650074).
-
- +o Where multiple draw buffers are enabled, per-fragment
- operations are not performed independently on all draw
- buffers. (650074).
-
- +o glDrawPixels() with format GL_DEPTH_COMPONENT does not
- update the stencil buffer even if the stencil test is
- enabled (760238).
-
- +o /usr/sbin/snapshot draws its initial rubberband box in
- the wrong place, although once you start the drag
- operation it is correct. Also, the filename dialog
- fails to echo keystrokes, but it reads and accepts them
- correctly (780810).
-
- +o When two or more contexts share texture objects, a
- texture state change made by one context to a
- particular texture object may not be noticed by the
- other contexts until they too make a state change to
- the same object. Setting a texture parameter to the
- same value it already had should be adequate to update
- the state in the new context (669213).
-
- +o Fog doesn't work right for z>0 (787991).
-
- +o On V6 and V8 systems, certain video timing tables are
- unavailable because the pixel clock rate they would use
- causes video artifacts (775262).
-
- +o In certain cases, exactly horizontal or vertical lines,
- which are offscreen to the left or the top
- respectively, may instead be drawn across the visible
- window. A workaround is to use the SGIX_vertex_preclip
- extension with the vertex preclip hint set to
- GL_NICEST; one way to do this is by setting the
- GL_VERTEX_PRECLIP environment variable to the value
- NICEST. (794987).
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