# The Mesa 3D Graphics Library

# Mesa 7.9.2 Release Notes / March 2, 2011

Mesa 7.9.2 is a bug fix release which fixes bugs found since the 7.9.1 release.

Mesa 7.9.2 implements the OpenGL 2.1 API, but the version reported by glGetString(GL_VERSION) depends on the particular driver being used. Some drivers don't support all the features required in OpenGL 2.1.

See the Compiling/Installing page for prerequisites for DRI hardware acceleration.

## MD5 checksums

    eb4ab8c1a03386def3ea34b1358e9cda  MesaLib-7.9.2.tar.gz
    8f6d1474912787ce13bd35f3bae9938a  MesaLib-7.9.2.tar.bz2
    427a81dd43ac97603768dc5c6af3df26  MesaLib-7.9.2.zip
    aacb8f4db997e346db40c6066942140a  MesaGLUT-7.9.2.tar.gz
    18abe6cff4fad8ad4752c7b7ab548e5d  MesaGLUT-7.9.2.tar.bz2
    3189e5732d636c71baf3d8bc23ce7b11  MesaGLUT-7.9.2.zip

## New features

None.

## Bug fixes

This list is likely incomplete.

- Fix an off-by-one bug in a vsplit assertion.
- Fix incorrect handling of `layout` qualifier with `in`, `out`, `attribute`, and `varying`.
- Fix an i965 GPU hang in GLSL shaders that contain an unconditional `discard` statement.
- Fix an i965 shader bug where the negative absolute value was generated instead of the absolute value of a negation.
- Fix numerous issues handling precision qualifiers in GLSL ES.
- Fixed a few GLX protocol encoder bugs (Julien Cristau)
- Assorted Gallium llvmpipe driver bug fixes
- Assorted Mesa/Gallium state tracker bug fixes
- Bug 26795 - gl_FragCoord off by one in Gallium drivers.
- Bug 29164 - [GLSL 1.20] invariant variable shouldn't be used before declaration
- Bug 29823 - GetUniform[if]v busted
- Bug 29927 - [glsl2] fail to compile shader with constructor for array of struct type
- Bug 30156 - [i965] After updating to Mesa 7.9, Civilization IV starts to show garbage
- Bug 31923 - [GLSL 1.20] allowing inconsistent centroid declaration between two vertex shaders
- Bug 31925 - [GLSL 1.20] "#pragma STDGL invariant(all)" fail
- Bug 32214 - [gles2]no link error happens when missing vertex shader or frag shader
- Bug 32375 - [gl gles2] Not able to get the attribute by function glGetVertexAttribfv
- Bug 32541 - Segmentation Fault while running an HDR (high dynamic range) rendering demo
- Bug 32569 - [gles2] glGetShaderPrecisionFormat not implemented yet
- Bug 32695 - [glsl] SIGSEGV glcpp/glcpp-parse.y:833
- Bug 32831 - [glsl] division by zero crashes GLSL compiler
- Bug 32910 - Keywords 'in' and 'out' not handled properly for GLSL 1.20 shaders
- Bug 33219 -[GLSL bisected] implicit sized array triggers segfault in ir_to_mesa_visitor::copy_propagate
- Bug 33306 - GLSL integer division by zero crashes GLSL compiler
- Bug 33308 -[glsl] ast_to_hir.cpp:3016: virtual ir_rvalue* ast_jump_statement::hir(exec_list*, _mesa_glsl_parse_state*): Assertion `ret != __null' failed.
- Bug 33316 - uniform array will be allocate one line more and initialize it when it was freed will abort
- Bug 33386 - Dubious assembler in read_rgba_span_x86.S
- Bug 33388 - Dubious assembler in xform4.S
- Bug 33433 - Error in x86-64 API dispatch code.
- Bug 33507 - [glsl] GLSL preprocessor modulus by zero crash
- Bug 33508 - [glsl] GLSL compiler modulus by zero crash
- Bug 33916 - Compiler accepts reserved operators % and %=
- Bug 34047 - Assert in _tnl_import_array() when using GLfixed vertex datatypes with GLESv2
- Bug 34114 - Sun Studio build fails due to standard library functions not being in global namespace
- Bug 34198 - [GLSL] implicit sized array with index 0 used gets assertion
- Ubuntu bug 691653 - compiz crashes when using alt-tab (the radeon driver kills it)
- Meego bug 13005 - Graphics GLSL issue lead to camera preview fail on Pinetrail

## Changes

The full set of changes can be viewed by using the following GIT command:

      git log mesa-7.9.1..mesa-7.9.2

Alberto Milone (1):

- r600c: add evergreen ARL support.

Brian Paul (19):

- draw: Fix an off-by-one bug in a vsplit assertion.
- mesa: fix a few format table mistakes, assertions
- mesa: fix num_draw_buffers==0 in fixed-function fragment program generation
- mesa: don't assert in GetIntegerIndexed, etc
- mesa: check for dummy renderbuffer in _mesa_FramebufferRenderbufferEXT()
- llvmpipe: make sure binning is active when we begin/end a query
- st/mesa: fix incorrect fragcoord.x translation
- softpipe: fix off-by-one error in setup_fragcoord_coeff()
- cso: fix loop bound in cso_set_vertex_samplers()
- st/mesa: set renderbuffer _BaseFormat in a few places
- st/mesa: fix the default case in st_format_datatype()
- st/mesa: need to translate clear color according to surface's base format
- docs: update 7.9.2 release notes with Brian's cherry-picks
- docs: add links to 7.9.1 and 7.9.2 release notes
- mesa: include compiler.h for ASSERT macro
- glsl: add ir_shader case in switch stmt to silence warning
- glsl2: fix signed/unsigned comparison warning
- mesa: implement glGetShaderPrecisionFormat()
- docs: updated environment variable list

Bryce Harrington (1):

- r300g: Null pointer check for buffer deref in gallium winsys

Chad Versace (14):

- glsl: At link-time, check that globals have matching centroid qualifiers
- glcpp: Fix segfault when validating macro redefinitions
- glsl: Fix parser rule for type_specifier
- glsl: Change default value of ast_type_specifier::precision
- glsl: Add semantic checks for precision qualifiers
- glsl: Add support for default precision statements
- glsl: Remove redundant semantic check in parser
- glsl: Fix semantic checks on precision qualifiers
- glsl: Fix segfault due to missing printf argument
- glsl: Mark 'in' variables at global scope as read-only
- glcpp: Raise error when modulus is zero
- glsl: Set operators '%' and '%=' to be reserved when GLSL < 1.30
- glsl: Reinstate constant-folding for division by zero
- tnl: Add support for datatype GL_FIXED in vertex arrays

Chia-I Wu (1):

- mesa: Add glDepthRangef and glClearDepthf to APIspec.xml.

Chris Wilson (1):

- intel: Check for unsupported texture when finishing using as a render target

Cyril Brulebois (1):

- Point to bugs.freedesktop.org rather than bugzilla.freedesktop.org

Dave Airlie (2):

- radeon/r200: fix fbo-clearmipmap + gen-teximage
- radeon: avoid segfault on 3D textures.

Dimitry Andric (4):

- mesa: s/movzx/movzbl/
- mesa: s/movzxw/movzwl/ in read_rgba_span_x86.S
- glapi: adding @ char before type specifier in glapi_x86.S
- glapi: add @GOTPCREL relocation type

Eric Anholt (11):

- i965: Avoid double-negation of immediate values in the VS.
- docs: Add a relnote for the Civ IV on i965.
- i965/vs: When MOVing to produce ABS, strip negate of the operand.
- glsl: Fix the lowering of variable array indexing to not lose write_masks.
- intel: Make renderbuffer tiling choice match texture tiling choice.
- glapi: Add entrypoints and enums for GL_ARB_ES2_compatibility.
- mesa: Add extension enable bit for GL_ARB_ES2_compatibility.
- mesa: Add actual support for glReleaseShaderCompiler from ES2.
- mesa: Add support for glDepthRangef and glClearDepthf.
- mesa: Add getters for ARB_ES2_compatibility MAX_*_VECTORS.
- mesa: Add getter for GL_SHADER_COMPILER with ARB_ES2_compatibility.

Ian Romanick (42):

- docs: Add 7.9.1 md5sums
- glsl: Support the 'invariant(all)' pragma
- glcpp: Generate an error for division by zero
- glsl: Add version_string containing properly formatted GLSL version
- glsl & glcpp: Refresh autogenerated lexer and parser files.
- glsl: Disallow 'in' and 'out' on globals in GLSL 1.20
- glsl: Track variable usage, use that to enforce semantics
- glsl: Allow 'in' and 'out' when 'layout' is also available
- docs: Initial set of release notes for 7.9.2
- mesa: bump version to 7.9.2-devel
- docs: Update 7.9.2 release notes
- i965: Make OPCODE_KIL_NV do its work in a temp, not the null reg!
- glsl: Refresh autogenerated lexer and parser files.
- glsl: Don't assert when the value returned by a function has no rvalue
- linker: Set sizes for non-global arrays as well
- linker: Propagate max_array_access while linking functions
- docs: Update 7.9.2 release notes
- Use C-style system headers in C++ code to avoid issues with std:: namespace
- mesa: glGetUniform only returns a single element of an array
- linker: Generate link errors when ES shaders are missing stages
- mesa: Fix error checks in GetVertexAttrib functions
- docs: Update 7.9.2 release notes
- mesa: Remove unsupported OES extensions
- glapi: Regenerate for GL_ARB_ES2_compatibility.
- mesa: Connect glGetShaderPrecisionFormat into the dispatch table
- i965: Set correct values for range/precision of fragment shader types
- i915: Set correct values for range/precision of fragment shader types
- intel: Fix typeos from 3d028024 and 790ff232
- glsl: Ensure that all GLSL versions are supported in the stand-alone compiler
- glsl: Reject shader versions not supported by the implementation
- mesa: Initial size for secondary color array is 3
- glcpp: Regenerate files from recent cherry picks
- glsl: Finish out the reduce/reduce error fixes
- glsl: Regenerate compiler files from cherry picks
- linker: Fix off-by-one error implicit array sizing
- i915: Only mark a register as available if all components are written
- i915: Calculate partial result to temp register first
- i915: Force lowering of all types of indirect array accesses in the FS
- docs: Update 7.9.2 release notes for recent cherry picks
- docs: Clean up bug fixes list
- intel: Remove driver date and related bits from renderer string
- mesa: set version string to 7.9.2 (final)

Jian Zhao (1):

- mesa: fix an error in uniform arrays in row calculating.

Julien Cristau (3):

- glx: fix request lengths
- glx: fix GLXChangeDrawableAttributesSGIX request
- glx: fix length of GLXGetFBConfigsSGIX

Keith Packard (1):

- glsl: Eliminate reduce/reduce conflicts in glsl grammar

Kenneth Graunke (12):

- glsl: Expose a public glsl_type::void_type const pointer.
- glsl: Don't bother unsetting a destructor that was never set.
- glsl, i965: Remove unnecessary talloc includes.
- glcpp: Remove use of talloc reference counting.
- ralloc: Add a fake implementation of ralloc based on talloc.
- Convert everything from the talloc API to the ralloc API.
- ralloc: a new MIT-licensed recursive memory allocator.
- Remove talloc from the make and automake build systems.
- Remove talloc from the SCons build system.
- Remove the talloc sources from the Mesa repository.
- glsl: Fix use of uninitialized values in _mesa_glsl_parse_state ctor.
- glsl: Use reralloc instead of plain realloc.

Marek Olšák (3):

- docs: fix messed up names with special characters in relnotes-7.9.1
- mesa: fix texture3D mipmap generation for UNSIGNED_BYTE_3_3_2
- st/dri: Track drawable context bindings

Paulo Zanoni (1):

- dri_util: fail driCreateNewScreen if InitScreen is NULL

Sam Hocevar (2):

- docs: add glsl info
- docs: fix glsl_compiler name

Vinson Lee (1):

- ralloc: Add missing va_end following va_copy.

nobled (1):

- glx: Put null check before use