# Mesa 7.9.1 Release Notes / January 7, 2011

Mesa 7.9.1 is a bug fix release which fixes bugs found since the 7.9 release.

Mesa 7.9.1 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

    78422843ea875ad4eac35b9b8584032b  MesaLib-7.9.1.tar.gz
    07dc6cfb5928840b8b9df5bd1b3ae434  MesaLib-7.9.1.tar.bz2
    c8eaea5b3c3d6dee784bd8c2db91c80f  MesaLib-7.9.1.zip
    ee9ecae4ca56fbb2d14dc15e3a0a7640  MesaGLUT-7.9.1.tar.gz
    41fc477d524e7dc5c84da8ef22422bea  MesaGLUT-7.9.1.tar.bz2
    90b287229afdf19317aa989d19462e7a  MesaGLUT-7.9.1.zip

## New features

None.

## Bug fixes

This list is likely incomplete.

- Bug 28800 - [r300c, r300g] Texture corruption with World of Warcraft
- Bug 29420 - Amnesia / HPL2 RendererFeatTest - not rendering correctly
- Bug 29946 - [swrast] piglit valgrind glsl-array-bounds-04 fails
- Bug 30261 - [GLSL 1.20] allowing inconsistent invariant declaration between two vertex shaders
- Bug 30632 - [softpipe] state_tracker/st_manager.c:489: st_context_notify_invalid_framebuffer: Assertion `stfb && stfb->iface == stfbi' failed.
- Bug 30694 - wincopy will crash on Gallium drivers when going to front buffer
- Bug 30787 - Invalid asm shader does not generate draw-time error when used with GLSL shader
- Bug 30993 - getFramebufferAttachmentParameteriv wrongly generates error
- Bug 31101 - [glsl2] abort() in ir_validate::visit_enter(ir_assignment *ir)
- Bug 31193 - [regression] aa43176e break water reflections
- Bug 31194 - The mesa meta save/restore code doesn't ref the current GLSL program
- Bug 31371 - glslparsertest: ir.cpp:358: ir_constant::ir_constant(const glsl_type*, const ir_constant_data*): Assertion `(type->base_type >= 0) && (type->base_type <= 3)' failed.
- Bug 31439 - Crash in glBufferSubData() with size == 0
- Bug 31495 - [i965 gles2c bisected] OpenGL ES 2.0 conformance GL2Tests_GetBIFD_input.run regressed
- Bug 31514 - isBuffer returns true for unbound buffers
- Bug 31560 - [tdfx] tdfx_tex.c:702: error: 'const struct gl_color_table' has no member named 'Format'
- Bug 31617 - Radeon/Compiz: 'failed to attach dri2 front buffer', error case not handled
- Bug 31648 - [GLSL] array-struct-array gets assertion: `(size >= 1) && (size <= 4)' failed.
- Bug 31650 - [GLSL] varying gl_TexCoord fails to be re-declared to different size in the second shader
- Bug 31673 - GL_FRAGMENT_PRECISION_HIGH preprocessor macro undefined in GLSL ES
- Bug 31690 - i915 shader compiler fails to flatten if in Aquarium webgl demo.
- Bug 31832 - [i915] Bad renderbuffer format: 21
- Bug 31841 - [drm:radeon_cs_ioctl] *ERROR* Invalid command stream !
- Bug 31894 - Writing to gl_PointSize with GLES2 corrupts other varyings
- Bug 31909 - [i965] brw_fs.cpp:1461: void fs_visitor::emit_bool_to_cond_code(ir_rvalue*): Assertion `expr->operands[i]->type->is_scalar()' failed.
- Bug 31934 - [gallium] Mapping empty buffer object causes SIGSEGV
- Bug 31983 - [i915 gles2] "if (expression with builtin/varying variables) discard" breaks linkage
- Bug 31985 - [GLSL 1.20] initialized uniform array considered as "unsized"
- Bug 31987 - [gles2] if input a wrong pname(GL_NONE) to glGetBoolean, it will not case GL_INVALID_ENUM
- Bug 32035 - [GLSL bisected] comparing unsized array gets segfault
- Bug 32070 - llvmpipe renders stencil demo incorrectly
- Bug 32273 - assertion fails when starting vdrift 2010 release with shaders enabled
- Bug 32287 - [bisected GLSL] float-int failure
- Bug 32311 - [965 bisected] Array look-ups broken on GM45
- Bug 32520 - [gles2] glBlendFunc(GL_ZERO, GL_DST_COLOR) will result in GL_INVALID_ENUM
- Bug 32825 - egl_glx driver completely broken in 7.9 branch [fix in master]

## Changes

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

      git log mesa-7.9..mesa-7.9.1

Alex Deucher (5):

- r100: revalidate after radeon_update_renderbuffers
- r600c: add missing radeon_prepare_render() call on evergreen
- r600c: properly align mipmaps to group size
- gallium/egl: fix r300 vs r600 loading
- r600c: fix some opcodes on evergreen

Aras Pranckevicius (2):

- glsl: fix crash in loop analysis when some controls can't be determined
- glsl: fix matrix type check in ir_algebraic

Brian Paul (27):

- swrast: fix choose_depth_texture_level() to respect mipmap filtering state
- st/mesa: replace assertion w/ conditional in framebuffer invalidation
- egl/i965: include inline_wrapper_sw_helper.h
- mesa: Add missing else in do_row_3D
- mesa: add missing formats in _mesa_format_to_type_and_comps()
- mesa: handle more pixel types in mipmap generation code
- mesa: make glIsBuffer() return false for never bound buffers
- mesa: fix glDeleteBuffers() regression
- swrast: init alpha value to 1.0 in opt_sample_rgb_2d()
- meta: Mask Stencil.Clear against stencilMax in _mesa_meta_Clear
- st/mesa: fix mapping of zero-sized buffer objects
- mesa: check for posix_memalign() errors
- llvmpipe: fix broken stencil writemask
- mesa: fix GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME query
- mesa: return GL_FRAMEBUFFER_DEFAULT as FBO attachment type
- mesa: make glGet*(GL_NONE) generate GL_INVALID_ENUM
- mesa: test for cube map completeness in glGenerateMipmap()
- tnl: Initialize gl_program_machine memory in run_vp.
- tnl: a better way to initialize the gl_program_machine memory
- mesa, st/mesa: disable GL_ARB_geometry_shader4
- glsl: fix off by one in register index assertion
- st/mesa: fix mipmap generation bug
- glsl: new glsl_strtod() wrapper to fix decimal point interpretation
- mesa: no-op glBufferSubData() on size==0
- tdfx: s/Format/_BaseFormat/
- st/mesa: fix renderbuffer pointer check in st_Clear()
- mesa: Bump the number of bits in the register index.

Chad Versace (5):

- glsl: Fix lexer rule for ^=
- glsl: Fix ast-to-hir for ARB_fragment_coord_conventions
- glsl: Fix ir_expression::constant_expression_value()
- glsl: Fix erroneous cast in ast_jump_statement::hir()
- glsl: Fix linker bug in cross_validate_globals()

Chia-I Wu (10):

- targets/egl: Fix linking with libdrm.
- st/vega: Fix version check in context creation.
- st/egl: Do not finish a fence that is NULL.
- egl: Fix a false negative check in _eglCheckMakeCurrent.
- st/mesa: Unreference the sampler view in st_bind_surface.
- egl_dri2: Fix __DRI_DRI2 version 1 support.
- st/vega: Do not wait NULL fences.
- mesa: Do not advertise GL_OES_texture_3D.
- egl_glx: Fix borken driver.
- egl: Check extensions.

Daniel Lichtenberger (1):

- radeon: fix potential segfault in renderbuffer update

Daniel Vetter (1):

- r200: revalidate after radeon_update_renderbuffers

Dave Airlie (1):

- r300g: fixup rs690 tiling stride alignment calculations.

Eric Anholt (13):

- intel: Allow CopyTexSubImage to InternalFormat 3/4 textures, like RGB/RGBA.
- glsl: Free the loop state context when we free the loop state.
- i965: Allow OPCODE_SWZ to put immediates in the first arg.
- i965: Add support for rendering to SARGB8 FBOs.
- glsl: Add a helper constructor for expressions that works out result type.
- glsl: Fix structure and array comparisions.
- glsl: Quiet unreachable no-return-from-function warning.
- glsl: Mark the array access for whole-array comparisons.
- glsl: Fix flipped return of has_value() for array constants.
- mesa: Add getters for the rest of the supported draw buffers.
- mesa: Add getters for ARB_copy_buffer's attachment points.
- i965: Correct the dp_read message descriptor setup on g4x.
- glsl: Correct the marking of InputsRead/OutputsWritten on in/out matrices.

Fabian Bieler (1):

- glsl: fix lowering conditional returns in subroutines

Francisco Jerez (3):

- meta: Don't leak alpha function/reference value changes.
- meta: Fix incorrect rendering of the bitmap alpha component.
- meta: Don't try to disable cube maps if the driver doesn't expose the extension.

Henri Verbeet (2):

- r600: Evergreen has two extra frac_bits for the sampler LOD state.
- st/mesa: Handle wrapped depth buffers in st_copy_texsubimage().

Ian Romanick (33):

- Add 7.9 md5sums
- docs: Import 7.8.x release notes from 7.8 branch.
- docs: download.html does not need to be updated for each release
- docs: Update mailing lines from sf.net to freedesktop.org
- docs: added news item for 7.9 release
- mesa: Validate assembly shaders when GLSL shaders are used
- linker: Reject shaders that have unresolved function calls
- mesa: Refactor validation of shader targets
- glsl: Slightly change the semantic of _LinkedShaders
- linker: Improve handling of unread/unwritten shader inputs/outputs
- glsl: Commit lexer files changed by previous cherry picking
- mesa: Make metaops use program refcounts instead of names.
- glsl: Fix incorrect gl_type of sampler2DArray and sampler1DArrayShadow
- mesa: Allow query of MAX_SAMPLES with EXT_framebuffer_multisample
- glsl: better handling of linker failures
- mesa: Fix glGet of ES2's GL_MAX_*_VECTORS properties.
- i915: Disallow alpha, red, RG, and sRGB as render targets
- glsl/linker: Free any IR discarded by optimization passes.
- glsl: Add an optimization pass to simplify discards.
- glsl: Add a lowering pass to move discards out of if-statements.
- i915: Correctly generate unconditional KIL instructions
- glsl: Add unary ir_expression constructor
- glsl: Ensure that equality comparisons don't return a NULL IR tree
- glcpp: Commit changes in generated files cause by previous commit
- glsl: Inherrit type of declared variable from initializer
- glsl: Inherrit type of declared variable from initializer after processing assignment
- linker: Ensure that unsized arrays have a size after linking
- linker: Fix regressions caused by previous commit
- linker: Allow built-in arrays to have different sizes between shader stages
- ir_to_mesa: Don't generate swizzles for record derefs of non-scalar/vectors
- Refresh autogenerated file builtin_function.cpp.
- docs: Initial set of release notes for 7.9.1
- mesa: set version string to 7.9.1

Julien Cristau (1):

- Makefile: don't include the same files twice in the tarball

Kenneth Graunke (19):

- glcpp: Return NEWLINE token for newlines inside multi-line comments.
- generate_builtins.py: Output large strings as arrays of characters.
- glsl: Fix constant component count in vector constructor emitting.
- ir_dead_functions: Actually free dead functions and signatures.
- glcpp: Define GL_FRAGMENT_PRECISION_HIGH if GLSL version >= 1.30.
- glsl: Unconditionally define GL_FRAGMENT_PRECISION_HIGH in ES2 shaders.
- glsl: Fix constant expression handling for <, >, <=, >= on vectors.
- glsl: Use do_common_optimization in the standalone compiler.
- glsl: Don't inline function prototypes.
- glsl: Add a virtual as_discard() method.
- glsl: Remove "discard" support from lower_jumps.
- glsl: Refactor get_num_operands.
- glcpp: Don't emit SPACE tokens in conditional_tokens production.
- glsl: Clean up code by adding a new is_break() function.
- glsl: Consider the "else" branch when looking for loop breaks.
- Remove OES_compressed_paletted_texture from the ES2 extension list.
- glsl/builtins: Compute the correct value for smoothstep(vec, vec, vec).
- Fix build on systems where "python" is python 3.
- i965: Internally enable GL_NV_blend_square on ES2.

Kristian Høgsberg (1):

- i965: Don't write mrf assignment for pointsize output

Luca Barbieri (1):

- glsl: Unroll loops with conditional breaks anywhere (not just the end)

Marek Olšák (17):

- r300g: fix microtiling for 16-bits-per-channel formats
- r300g: fix texture border for 16-bits-per-channel formats
- r300g: add a default channel ordering of texture border for unhandled formats
- r300g: fix texture border color for all texture formats
- r300g: fix rendering with no vertex elements
- r300/compiler: fix rc_rewrite_depth_out for it to work with any instruction
- r300g: fix texture border color once again
- r300g: fix texture swizzling with compressed textures on r400-r500
- r300g: disable ARB_texture_swizzle if S3TC is enabled on r3xx-only
- mesa, st/mesa: fix gl_FragCoord with FBOs in Gallium
- st/mesa: initialize key in st_vp_varient
- r300/compiler: fix swizzle lowering with a presubtract source operand
- r300g: fix rendering with a vertex attrib having a zero stride
- ir_to_mesa: Add support for conditional discards.
- r300g: finally fix the texture corruption on r3xx-r4xx
- mesa: fix texel store functions for some float formats
- r300/compiler: disable the rename_regs pass for loops

Mario Kleiner (1):

- mesa/r300classic: Fix dri2Invalidate/radeon_prepare_render for page flipping.

Peter Clifton (1):

- intel: Fix emit_linear_blit to use DWORD aligned width blits

Robert Hooker (2):

- intel: Add a new B43 pci id.
- egl_dri2: Add missing intel chip ids.

Roland Scheidegger (1):

- r200: fix r200 large points

Thomas Hellstrom (17):

- st/xorg: Don't try to use option values before processing options
- xorg/vmwgfx: Make vmwarectrl work also on 64-bit servers
- st/xorg: Add a customizer option to get rid of annoying cursor update flicker
- xorg/vmwgfx: Don't hide HW cursors when updating them
- st/xorg: Don't try to remove invalid fbs
- st/xorg: Fix typo
- st/xorg, xorg/vmwgfx: Be a bit more frendly towards cross-compiling environments
- st/xorg: Fix compilation errors for Xservers compiled without Composite
- st/xorg: Don't use deprecated x*alloc / xfree functions
- xorg/vmwgfx: Don't use deprecated x*alloc / xfree functions
- st/xorg: Fix compilation for Xservers >= 1.10
- mesa: Make sure we have the talloc cflags when using the talloc headers
- egl: Add an include for size_t
- mesa: Add talloc includes for gles
- st/egl: Fix build for include files in nonstandard places
- svga/drm: Optionally resolve calls to powf during link-time
- gallium/targets: Trivial crosscompiling fix

Tom Stellard (7):

- r300/compiler: Make sure presubtract sources use supported swizzles
- r300/compiler: Fix register allocator's handling of loops
- r300/compiler: Fix instruction scheduling within IF blocks
- r300/compiler: Use zero as the register index for unused sources
- r300/compiler: Ignore alpha dest register when replicating the result
- r300/compiler: Use correct swizzles for all presubtract sources
- r300/compiler: Don't allow presubtract sources to be remapped twice

Vinson Lee (1):

- glsl: Fix 'control reaches end of non-void function' warning.

richard (1):

- r600c : inline vertex format is not updated in an app, switch to use vfetch constants. For the 7.9 and 7.10 branches as well.