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- 3. _C_h_a_n_g_e_s__a_n_d__A_d_d_i_t_i_o_n_s
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- 3.1 _C_h_a_n_g_e_s__a_n_d__A_d_d_i_t_i_o_n_s__f_o_r__I_R_I_X__6_._4
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- IRIX 6.4 supports Onyx2 InfiniteReality, Onyx2 Reality,
- OCTANE MXI, OCTANE SSI and OCTANE SI graphics systems only.
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- Support for glprof has been removed. As of the current
- release, the IrisGL Profiler product is no longer supported.
- An OpenGL-based profiling tool will be available in a future
- release.
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- OpenGL 1.1 is supported on OCTANE MXI, OCTANE SSI and OCTANE
- SI platforms.
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- Fortran OpenGL and IrisGL libraries, header files and man
- pages have been repackaged into the _g_l__d_e_v._s_w._f_o_r_t_r_a_n,
- _g_l__d_e_v._s_w_6_4._f_o_r_t_r_a_n and _g_l__d_e_v._m_a_n._f_o_r_t_r_a_n subsystems. These
- subsystems update and replace _f_t_n__d_e_v._h_d_r._l_i_b_g_l,
- _f_t_n__d_e_v._s_w._l_i_b_g_l, _f_t_n__d_e_v._s_w._o_p_e_n_g_l, _f_t_n__d_e_v._s_w_6_4._o_p_e_n_g_l,
- and _f_t_n_7_7__d_e_v._m_a_n._l_i_b_g_l from version 7.1 of the MIPSpro
- Fortran 77 product on IRIX 6.4 systems.
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- 3.2 _C_h_a_n_g_e_s__a_n_d__A_d_d_i_t_i_o_n_s__f_o_r__I_R_I_X__6_._2
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- IRIX 6.2 adds both OpenGL and IrisGL library support for the
- new n32 abi for all platforms including Onyx, Power Onyx and
- Crimson. In addition, IRIX 6.2 adds Onyx to the previous
- list (Power Onyx, Power Challenge) of platforms supporting
- 64 bit OpenGL. IrisGL is supported exclusively by the 32
- bit ABIs.
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- IRIX 6.2 also adds support for the new InfiniteReality
- graphics adaptor on Onyx systems. InfiniteReality offers a
- large number of new features; see chapter 6 (OpenGL) for
- more information.
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- IRIX 6.2 supports all Impact configurations: Max Impact,
- High Impact, and Solid Impact. On Max Impact, High Impact,
- and Solid Impact, the Pbuffer OpenGL extension is now
- supported. See chapter 7 for details about the pbuffer
- release on Impact. The Presenter display adapter/projector
- is supported in this release as a new feature. In addition,
- the OpenGL texture LOD extension is now supported. Some new
- timing tables have also been added for impact: the
- 1600x1200 timing tables support a larger screen size on
- appropriate monitors; the new High Impact 1024x768_60_pbuf,
- 1024x768_72_pbuf, and 1024x768_76_pbuf timing tables differ
- from their preexisting counterparts (such as 1024x768_60) in
- that they support faster triangle fill rates (in some
- operations), and reserve one complete set of framebuffer
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- bitplanes for pbuffer use. For applications which require a
- large number of pbuffers, the 1024x768_XX_pbuf timing tables
- provide a new solution. Vertex rendering performance has
- been increased substantially in this release by changing the
- clipping algorithm.
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- IrisGL changes have been limited to bug fixes. For more
- information, please see chapter 4.
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- 3.3 _C_h_a_n_g_e_s__a_n_d__A_d_d_i_t_i_o_n_s__f_o_r__I_R_I_X__5_._3
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- OpenGL is now supported on all SGI graphics adaptors except
- for the G, GT and GTX.
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- In this release, several OpenGL extensions have been added.
- Most of them are supported on all graphics adaptors while
- others are restricted to just RealityEngine, RealityEngine2,
- and Impact. For full details on the OpenGL extensions see
- chapter 6 of these release notes or the online manual pages
- for _g_l_i_n_t_r_o and _g_l_x_i_n_t_r_o.
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- On Indy (XL), Indigo2 XL, Indigo Entry, and Indigo XS models
- without hardware z buffers, an optimization has been added
- to OpenGL to improve the speed of zbuffer clears. This
- acceleration will occur if the depth function is GL_LESS or
- GL_LEQUAL and the z clear value is 1.0 or if the depth
- function is GL_GREATER or GL_GEQUAL and the z clear value is
- 0.0. The GLX visuals have been altered to a 24-bit deep z-
- buffer (in 5.2 it was 32-bits). Users that had explicitly
- asked for a 32-bit z-buffer will need to alter their code.
- The decrease of z resolution is caused by additional
- information that needs to be kept on a per-pixel basis.
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- Other optimizations for OpenGL on the Indy (XL), Indigo2 XL,
- Indigo Entry, and Indigo XS models include speedup of z
- buffered non-antialised points, faster implementation of
- glPolygonOffsetSGI, faster mip-mapped textured polygons, and
- faster anti-aliased polygons.
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- Optimizations for Iris GL on the Indy (XL) and Indigo2 XL
- include faster clear times, and faster 2x2 pixel zooms for
- lrectwrite.
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- The IrisGL changes have otherwise been limited to bug fixes.
- See Chapter 4 for details.
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