xref: /aosp_15_r20/external/mesa3d/docs/relnotes/18.0.0.rst (revision 6104692788411f58d303aa86923a9ff6ecaded22)

Mesa 18.0.0 Release Notes / March 27 2018
=========================================

Mesa 18.0.0 is a new development release. People who are concerned with
stability and reliability should stick with a previous release or wait
for Mesa 18.0.1.

Mesa 18.0.0 implements the OpenGL 4.5 API, but the version reported by
glGetString(GL_VERSION) or glGetIntegerv(GL_MAJOR_VERSION) /
glGetIntegerv(GL_MINOR_VERSION) depends on the particular driver being
used. Some drivers don't support all the features required in OpenGL
4.5. OpenGL 4.5 is **only** available if requested at context creation
because compatibility contexts are not supported.

SHA256 checksums
----------------

::

   93c2d3504b2871ac2146603fb1270f341d36a39695e2950a469c5eac74f98457  mesa-18.0.0.tar.gz
   694e5c3d37717d23258c1f88bc134223c5d1aac70518d2f9134d6df3ee791eea  mesa-18.0.0.tar.xz

New features
------------

Note: some of the new features are only available with certain drivers.

-  Disk shader cache support for i965 when MESA_GLSL_CACHE_DISABLE
   environment variable is set to "0" or "false"
-  GL_ARB_shader_atomic_counters and GL_ARB_shader_atomic_counter_ops on
   r600/evergreen+
-  GL_ARB_shader_image_load_store and GL_ARB_shader_image_size on
   r600/evergreen+
-  GL_ARB_shader_storage_buffer_object on r600/evergreen+
-  GL_ARB_compute_shader on r600/evergreen+
-  GL_ARB_cull_distance on r600/evergreen+
-  GL_ARB_enhanced_layouts on r600/evergreen+
-  GL_ARB_bindless_texture on nvc0/kepler
-  OpenGL 4.3 on r600/evergreen with hw fp64 support
-  Support 1 binary format for GL_ARB_get_program_binary on i965. (For
   the 18.0 release, 0 formats continue to be supported in compatibility
   profiles.)
-  Cannonlake support on i965 and anv

Bug fixes
---------

-  `Bug 85564 <https://bugs.freedesktop.org/show_bug.cgi?id=85564>`__ -
   Dead Island rendering issues
-  `Bug 90311 <https://bugs.freedesktop.org/show_bug.cgi?id=90311>`__ -
   Fail to build libglx with clang at linking stage
-  `Bug 92363 <https://bugs.freedesktop.org/show_bug.cgi?id=92363>`__ -
   [BSW/BDW] ogles1conform Gets test fails
-  `Bug 94739 <https://bugs.freedesktop.org/show_bug.cgi?id=94739>`__ -
   Mesa 11.1.2 implementation error: bad format MESA_FORMAT_Z_FLOAT32 in
   \_mesa_unpack_uint_24_8_depth_stencil_row
-  `Bug 97532 <https://bugs.freedesktop.org/show_bug.cgi?id=97532>`__ -
   Regression: GLB 2.7 & Glmark-2 GLES versions segfault due to linker
   precision error (259fc505) on dead variable
-  `Bug 97852 <https://bugs.freedesktop.org/show_bug.cgi?id=97852>`__ -
   Unreal Engine corrupted preview viewport
-  `Bug 100438 <https://bugs.freedesktop.org/show_bug.cgi?id=100438>`__
   - glsl/ir.cpp:1376:
   ir_dereference_variable::ir_dereference_variable(ir_variable*):
   Assertion \`var != NULL' failed.
-  `Bug 101378 <https://bugs.freedesktop.org/show_bug.cgi?id=101378>`__
   - interpolateAtSample check for input parameter is too strict
-  `Bug 101442 <https://bugs.freedesktop.org/show_bug.cgi?id=101442>`__
   - Piglit shaders@ssa@fs-if-def-else-break fails with sb but passes
   with R600_DEBUG=nosb
-  `Bug 101560 <https://bugs.freedesktop.org/show_bug.cgi?id=101560>`__
   - SPIR-V OpSwitch with int64 not supported even though shaderInt64 is
   true
-  `Bug 101691 <https://bugs.freedesktop.org/show_bug.cgi?id=101691>`__
   - gfx corruption on windowed 3d-apps running on dGPU
-  `Bug 102177 <https://bugs.freedesktop.org/show_bug.cgi?id=102177>`__
   - [SKL] ES31-CTS.core.sepshaderobjs.StateInteraction fails
   sporadically
-  `Bug 102264 <https://bugs.freedesktop.org/show_bug.cgi?id=102264>`__
   - Missing MESA_FORMAT_{B8G8R8A8,B8G8R8X8}_SRGB formats
-  `Bug 102354 <https://bugs.freedesktop.org/show_bug.cgi?id=102354>`__
   - Mesa 17.2 no longer can give SRGB-capable framebuffer on i965, even
   though Mesa 17.1.x does.
-  `Bug 102358 <https://bugs.freedesktop.org/show_bug.cgi?id=102358>`__
   - WarThunder freezes at start, with activated vsync (vblank_mode=2)
-  `Bug 102435 <https://bugs.freedesktop.org/show_bug.cgi?id=102435>`__
   - [skl,kbl] [drm] GPU hang in Valve games based on Source 1
-  `Bug 102503 <https://bugs.freedesktop.org/show_bug.cgi?id=102503>`__
   - Report SRGB framebuffer to SuperTuxKart to workaround SuperTuxKart
   crash
-  `Bug 102665 <https://bugs.freedesktop.org/show_bug.cgi?id=102665>`__
   - test_glsl_to_tgsi_lifetime.cpp:53:67: error: ‘>>’ should be ‘> >’
   within a nested template argument list
-  `Bug 102677 <https://bugs.freedesktop.org/show_bug.cgi?id=102677>`__
   - [OpenGL CTS] KHR-GL45.CommonBugs.CommonBug_PerVertexValidation
   fails
-  `Bug 102680 <https://bugs.freedesktop.org/show_bug.cgi?id=102680>`__
   - [OpenGL CTS] KHR-GL45.shader_ballot_tests.ShaderBallotBitmasks
   fails
-  `Bug 102710 <https://bugs.freedesktop.org/show_bug.cgi?id=102710>`__
   - vkCmdBlitImage with arrayLayers > 1 fails
-  `Bug 102774 <https://bugs.freedesktop.org/show_bug.cgi?id=102774>`__
   - [BDW] [Bisected] Absolute constant buffers break VAAPI in mpv
-  `Bug 102809 <https://bugs.freedesktop.org/show_bug.cgi?id=102809>`__
   - Rust shadows(?) flash random colours
-  `Bug 102897 <https://bugs.freedesktop.org/show_bug.cgi?id=102897>`__
   - Separate bind points are not implemented correctly
-  `Bug 102955 <https://bugs.freedesktop.org/show_bug.cgi?id=102955>`__
   - HyperZ related rendering issue in ARK: Survival Evolved
-  `Bug 103006 <https://bugs.freedesktop.org/show_bug.cgi?id=103006>`__
   - [OpenGL CTS] [HSW]
   KHR-GL45.vertex_attrib_binding.basic-inputL-case1
-  `Bug 103007 <https://bugs.freedesktop.org/show_bug.cgi?id=103007>`__
   - [OpenGL CTS] [HSW]
   KHR-GL45.gpu_shader_fp64.fp64.max_uniform_components fails
-  `Bug 103085 <https://bugs.freedesktop.org/show_bug.cgi?id=103085>`__
   - [ivb byt hsw] piglit.spec.arb_indirect_parameters.tf-count-arrays
-  `Bug 103098 <https://bugs.freedesktop.org/show_bug.cgi?id=103098>`__
   - [OpenGL CTS] KHR-GL45.enhanced_layouts.varying_structure_locations
   fails
-  `Bug 103101 <https://bugs.freedesktop.org/show_bug.cgi?id=103101>`__
   - [SKL][bisected] DiRT Rally GPU hang
-  `Bug 103115 <https://bugs.freedesktop.org/show_bug.cgi?id=103115>`__
   - [BSW BXT GLK]
   dEQP-VK.spirv_assembly.instruction.compute.sconvert.int32_to_int64
-  `Bug 103128 <https://bugs.freedesktop.org/show_bug.cgi?id=103128>`__
   - [softpipe] piglit fs-ldexp regression
-  `Bug 103142 <https://bugs.freedesktop.org/show_bug.cgi?id=103142>`__
   - R600g+sb: optimizer apparently stuck in an endless loop
-  `Bug 103227 <https://bugs.freedesktop.org/show_bug.cgi?id=103227>`__
   - [G965 G45 ILK]
   ES2-CTS.gtf.GL2ExtensionTests.texture_float.texture_float regression
-  `Bug 103283 <https://bugs.freedesktop.org/show_bug.cgi?id=103283>`__
   - drm_get_device_name_for_fd is broken on FreeBSD
-  `Bug 103388 <https://bugs.freedesktop.org/show_bug.cgi?id=103388>`__
   - Linking libcltgsi.la (llvm/codegen/libclllvm_la-common.lo) fails
   with "error: no match for 'operator-'" with GCC-7, Mesa from Git and
   current LLVM revisions
-  `Bug 103393 <https://bugs.freedesktop.org/show_bug.cgi?id=103393>`__
   - glDispatchComputeGroupSizeARB : gl_GlobalInvocationID.x !=
   gl_WorkGroupID.x \* gl_LocalGroupSizeARB.x + gl_LocalInvocationID.x
-  `Bug 103412 <https://bugs.freedesktop.org/show_bug.cgi?id=103412>`__
   - gallium/wgl: Another fix to context creation without prior
   SetPixelFormat()
-  `Bug 103496 <https://bugs.freedesktop.org/show_bug.cgi?id=103496>`__
   - svga_screen.c:26:46: error: git_sha1.h: No such file or directory
-  `Bug 103513 <https://bugs.freedesktop.org/show_bug.cgi?id=103513>`__
   - [build failure] radv_shader.c:683:2: error: format not a string
   literal and no format arguments [-Werror=format-security]
-  `Bug 103519 <https://bugs.freedesktop.org/show_bug.cgi?id=103519>`__
   - wayland egl apps crash on start with mesa 17.2
-  `Bug 103529 <https://bugs.freedesktop.org/show_bug.cgi?id=103529>`__
   - [GM45] GPU hang with mpv fullscreen (bisected)
-  `Bug 103537 <https://bugs.freedesktop.org/show_bug.cgi?id=103537>`__
   - i965: Shadow of Mordor broken since commit
   379b24a40d3d34ffdaaeb1b328f50e28ecb01468 on Haswell
-  `Bug 103544 <https://bugs.freedesktop.org/show_bug.cgi?id=103544>`__
   - Graphical glitches r600 in game this war of mine linux native
-  `Bug 103579 <https://bugs.freedesktop.org/show_bug.cgi?id=103579>`__
   - Vertex shader causes compiler to crash in SPIRV-to-NIR
-  `Bug 103616 <https://bugs.freedesktop.org/show_bug.cgi?id=103616>`__
   - Increased difference from reference image in shaders
-  `Bug 103626 <https://bugs.freedesktop.org/show_bug.cgi?id=103626>`__
   - [SNB] ES3-CTS.functional.shaders.precision
-  `Bug 103628 <https://bugs.freedesktop.org/show_bug.cgi?id=103628>`__
   - [BXT, GLK, BSW] KHR-GL46.shader_ballot_tests.ShaderBallotBitmasks
-  `Bug 103653 <https://bugs.freedesktop.org/show_bug.cgi?id=103653>`__
   - Unreal segfault since gallium/u_threaded: avoid syncs for
   get_query_result
-  `Bug 103658 <https://bugs.freedesktop.org/show_bug.cgi?id=103658>`__
   - addrlib/gfx9/gfx9addrlib.cpp:727:50: error: expected expression
-  `Bug 103674 <https://bugs.freedesktop.org/show_bug.cgi?id=103674>`__
   - u_queue.c:173:7: error: implicit declaration of function
   'timespec_get' is invalid in C99
-  `Bug 103746 <https://bugs.freedesktop.org/show_bug.cgi?id=103746>`__
   - [BDW BSW SKL KBL] dEQP-GLES31.functional.copy_image regressions
-  `Bug 103759 <https://bugs.freedesktop.org/show_bug.cgi?id=103759>`__
   - plasma desktop corrupted rendering
-  `Bug 103784 <https://bugs.freedesktop.org/show_bug.cgi?id=103784>`__
   - [bisected] Egl changes breaks all of EGL
-  `Bug 103787 <https://bugs.freedesktop.org/show_bug.cgi?id=103787>`__
   - [BDW,BSW] gpu hang on
   spec.arb_pipeline_statistics_query.arb_pipeline_statistics_query-comp
-  `Bug 103801 <https://bugs.freedesktop.org/show_bug.cgi?id=103801>`__
   - [i965] >Observer\_ issue
-  `Bug 103808 <https://bugs.freedesktop.org/show_bug.cgi?id=103808>`__
   - [radeonsi, bisected] World of Warcraft scribbling all over screen
-  `Bug 103902 <https://bugs.freedesktop.org/show_bug.cgi?id=103902>`__
   - Portal 2 game hangs at startup with latest mesa dev
-  `Bug 103904 <https://bugs.freedesktop.org/show_bug.cgi?id=103904>`__
   - Source engine-based games won't hang at start without R600_DEBUG=vs
-  `Bug 103909 <https://bugs.freedesktop.org/show_bug.cgi?id=103909>`__
   - anv_allocator.c:113:1: error: static declaration of ‘memfd_create’
   follows non-static declaration
-  `Bug 103942 <https://bugs.freedesktop.org/show_bug.cgi?id=103942>`__
   - KHR-GL46.enhanced_layouts.varying\* regression
-  `Bug 103955 <https://bugs.freedesktop.org/show_bug.cgi?id=103955>`__
   - Using array in structure results in wrong GLSL compilation output
-  `Bug 103966 <https://bugs.freedesktop.org/show_bug.cgi?id=103966>`__
   - Mesa 17.2.5 implementation error: bad format MESA_FORMAT_Z_FLOAT32
   in \_mesa_unpack_uint_24_8_depth_stencil_row
-  `Bug 103988 <https://bugs.freedesktop.org/show_bug.cgi?id=103988>`__
   - Intermittent piglit failures with shader cache enabled
-  `Bug 104005 <https://bugs.freedesktop.org/show_bug.cgi?id=104005>`__
   - [sklgt4e] GPU hangs in Car_Chase
-  `Bug 104119 <https://bugs.freedesktop.org/show_bug.cgi?id=104119>`__
   - radv: OpBitFieldInsert produces 0 with a loop counter for Insert
-  `Bug 104141 <https://bugs.freedesktop.org/show_bug.cgi?id=104141>`__
   - include/c11/threads_posix.h:96: undefined reference to
   \`pthread_once'
-  `Bug 104143 <https://bugs.freedesktop.org/show_bug.cgi?id=104143>`__
   - r600/sb: clobbers gl_Position -> gl_FragCoord
-  `Bug 104163 <https://bugs.freedesktop.org/show_bug.cgi?id=104163>`__
   - [GEN9+] 2-3% perf drop in GfxBench Manhattan 3.1 from "i965:
   Disable regular fast-clears (CCS_D) on gen9+"
-  `Bug 104183 <https://bugs.freedesktop.org/show_bug.cgi?id=104183>`__
   - mesa-17.3.0/src/broadcom/qpu/qpu_pack.c:171]: (error) Invalid
   memcmp() argument
-  `Bug 104199 <https://bugs.freedesktop.org/show_bug.cgi?id=104199>`__
   - [i965 bisected] BIO and EM Vision in >Observer\_ is broken since
   commit af2c320190f3c73180f1610c8df955a7fa2a4d09
-  `Bug 104213 <https://bugs.freedesktop.org/show_bug.cgi?id=104213>`__
   - NULL pointer access crashes on compiling Vulkan compute shaders
   after "anv: Add support for the variablePointers feature"
-  `Bug 104214 <https://bugs.freedesktop.org/show_bug.cgi?id=104214>`__
   - Dota crashes when switching from game to desktop
-  `Bug 104226 <https://bugs.freedesktop.org/show_bug.cgi?id=104226>`__
   - [bisected] Anvil accesses uninitialized memory while compiling
   shaders
-  `Bug 104231 <https://bugs.freedesktop.org/show_bug.cgi?id=104231>`__
   - DispatchSanity_test.GL30 regression
-  `Bug 104246 <https://bugs.freedesktop.org/show_bug.cgi?id=104246>`__
   - Talos Principle Vulkan version crash: spirv_to_nir() returns NULL
   entry_point
-  `Bug 104271 <https://bugs.freedesktop.org/show_bug.cgi?id=104271>`__
   - i965: Timeout in
   dEQP-GLES31.functional.ssbo.layout.random.all_shared_buffer.5
-  `Bug 104288 <https://bugs.freedesktop.org/show_bug.cgi?id=104288>`__
   - Steamroll needs allow_glsl_cross_stage_interpolation_mismatch=true
-  `Bug 104302 <https://bugs.freedesktop.org/show_bug.cgi?id=104302>`__
   - Wolfenstein 2 (2017) under wine graphical artifacting on RADV
-  `Bug 104331 <https://bugs.freedesktop.org/show_bug.cgi?id=104331>`__
   - [r600g] Ogre demo "TutorialUAV01" crash at
   r600_decompress_color_images
-  `Bug 104338 <https://bugs.freedesktop.org/show_bug.cgi?id=104338>`__
   - NULL pointer access crash on Sacha Willems' Vulkan raytracing demo
   after "spirv: Add basic type validation for OpLoad, OpStore, and
   OpCopyMemory"
-  `Bug 104359 <https://bugs.freedesktop.org/show_bug.cgi?id=104359>`__
   - Mesa freezes in "vtn_cfg_walk_blocks" with Sacha Willems' hdr,
   parallaxmapping and specializationconstants Vulkan demos
-  `Bug 104381 <https://bugs.freedesktop.org/show_bug.cgi?id=104381>`__
   - swr fails to build since llvm-svn r321257
-  `Bug 104383 <https://bugs.freedesktop.org/show_bug.cgi?id=104383>`__
   - [KBL] Intel GPU hang with firefox
-  `Bug 104411 <https://bugs.freedesktop.org/show_bug.cgi?id=104411>`__
   - [CCS] lemonbar-xft GPU hang
-  `Bug 104424 <https://bugs.freedesktop.org/show_bug.cgi?id=104424>`__
   - DOOM 2016 broken by spirv OpStore validation
-  `Bug 104487 <https://bugs.freedesktop.org/show_bug.cgi?id=104487>`__
   - [KBL] portal2_linux GPU hang
-  `Bug 104490 <https://bugs.freedesktop.org/show_bug.cgi?id=104490>`__
   - [radeonsi/290x] Dota2 fails to start (can't create opengl context)
-  `Bug 104492 <https://bugs.freedesktop.org/show_bug.cgi?id=104492>`__
   - Compute Shader: Wrong alignment when assigning struct value to
   structured SSBO
-  `Bug 104546 <https://bugs.freedesktop.org/show_bug.cgi?id=104546>`__
   - Crash happens when running compute pipeline after calling
   glxMakeCurrent two times
-  `Bug 104551 <https://bugs.freedesktop.org/show_bug.cgi?id=104551>`__
   - Check if Mako templates for Python are installed
-  `Bug 104625 <https://bugs.freedesktop.org/show_bug.cgi?id=104625>`__
   - semicolon after if
-  `Bug 104636 <https://bugs.freedesktop.org/show_bug.cgi?id=104636>`__
   - [BSW/HD400] Aztec Ruins GL version GPU hangs
-  `Bug 104642 <https://bugs.freedesktop.org/show_bug.cgi?id=104642>`__
   - Android: NULL pointer dereference with i965 mesa-dev, seems
   build_id_length related
-  `Bug 104654 <https://bugs.freedesktop.org/show_bug.cgi?id=104654>`__
   - r600/sb: Alien Isolation GPU lock
-  `Bug 104668 <https://bugs.freedesktop.org/show_bug.cgi?id=104668>`__
   -
   dEQP-GLES31.functional.shaders.linkage.uniform.block.differing_precision
   regression
-  `Bug 104677 <https://bugs.freedesktop.org/show_bug.cgi?id=104677>`__
   - radv_generate_graphics_pipeline_key reads input rate from incorrect
   binding
-  `Bug 104690 <https://bugs.freedesktop.org/show_bug.cgi?id=104690>`__
   - [G33] regression: piglit.spec.!opengl 1_4.draw-batch and
   gl-1_4-dlist-multidrawarrays
-  `Bug 104711 <https://bugs.freedesktop.org/show_bug.cgi?id=104711>`__
   - [skl CCS] Oxenfree (unity engine game) hangs GPU
-  `Bug 104741 <https://bugs.freedesktop.org/show_bug.cgi?id=104741>`__
   - Graphic corruption for Android apps Telegram and KineMaster
-  `Bug 104742 <https://bugs.freedesktop.org/show_bug.cgi?id=104742>`__
   - [swrast] piglit gl-1.4-dlist-multidrawarrays regression
-  `Bug 104746 <https://bugs.freedesktop.org/show_bug.cgi?id=104746>`__
   - [swrast] piglit attribs regression
-  `Bug 104749 <https://bugs.freedesktop.org/show_bug.cgi?id=104749>`__
   - rasterizer/jitter/JitManager.cpp:252:91: error: no matching
   function for call to ‘llvm::DIBuilder::createBasicType(const char
   [8], int, llvm::dwarf::TypeKind)’
-  `Bug 104762 <https://bugs.freedesktop.org/show_bug.cgi?id=104762>`__
   - Various segfaults/problems in qt/plasma
-  `Bug 104777 <https://bugs.freedesktop.org/show_bug.cgi?id=104777>`__
   - Attaching multiple shader objects for the same stage to a GLSL
   program triggers a linker error
-  `Bug 104884 <https://bugs.freedesktop.org/show_bug.cgi?id=104884>`__
   - memory leak with intel i965 mesa when running android container in
   Ubuntu
-  `Bug 104905 <https://bugs.freedesktop.org/show_bug.cgi?id=104905>`__
   - SpvOpFOrdEqual doesn't return correct results for NaNs
-  `Bug 104915 <https://bugs.freedesktop.org/show_bug.cgi?id=104915>`__
   - Indexed SHADING_LANGUAGE_VERSION query not supported
-  `Bug 104923 <https://bugs.freedesktop.org/show_bug.cgi?id=104923>`__
   - anv: Dota2 rendering corruption
-  `Bug 105013 <https://bugs.freedesktop.org/show_bug.cgi?id=105013>`__
   - [regression] GLX+VA-API+clutter-gst video playback is corrupt with
   Mesa 17.3 (but is fine with 17.2)
-  `Bug 105029 <https://bugs.freedesktop.org/show_bug.cgi?id=105029>`__
   - simdlib_512_avx512.inl:371:57: error: could not convert
   ‘_mm512_mask_blend_epi32((__mmask16)(ImmT), a, b)’ from ‘__m512i’
   {aka ‘__vector(8) long long int’} to ‘SIMDImpl::SIMD512Impl::Float’
-  `Bug 105065 <https://bugs.freedesktop.org/show_bug.cgi?id=105065>`__
   - Qt Programs occasionally fail to render with new Mesa
   (glGetProgramBinary)
-  `Bug 105098 <https://bugs.freedesktop.org/show_bug.cgi?id=105098>`__
   - [RADV] GPU freeze with simple Vulkan App
-  `Bug 105103 <https://bugs.freedesktop.org/show_bug.cgi?id=105103>`__
   - Wayland master causes Mesa to fail to compile
-  `Bug 105120 <https://bugs.freedesktop.org/show_bug.cgi?id=105120>`__
   - meson build broken
-  `Bug 105224 <https://bugs.freedesktop.org/show_bug.cgi?id=105224>`__
   - Webgl Pointclouds flickers
-  `Bug 105255 <https://bugs.freedesktop.org/show_bug.cgi?id=105255>`__
   - Waiting for fences without waitAll is not implemented
-  `Bug 105271 <https://bugs.freedesktop.org/show_bug.cgi?id=105271>`__
   - WebGL2 shader crashes i965_dri.so 17.3.3
-  `Bug 105290 <https://bugs.freedesktop.org/show_bug.cgi?id=105290>`__
   - [BSW/HD400] SynMark OglCSDof GPU hangs when shaders come from cache
-  `Bug 105292 <https://bugs.freedesktop.org/show_bug.cgi?id=105292>`__
   - vkGetQueryPoolResults returns incorrect query status for large
   query buffers (bisected)
-  `Bug 105436 <https://bugs.freedesktop.org/show_bug.cgi?id=105436>`__
   - Blinking textures in UT2004 [bisected]
-  `Bug 105464 <https://bugs.freedesktop.org/show_bug.cgi?id=105464>`__
   - Reading per-patch outputs in Tessellation Control Shader returns
   undefined values

Changes
-------

-  Remove incomplete GLX_MESA_set_3dfx_mode from the Xlib libGL