# The Mesa 3D Graphics Library

# Mesa 6.5 Release Notes / March 31, 2006

Mesa 6.5 is a new development release.

## MD5 checksums

    657be3b92f6dabc78a67ed9cb8d67813  MesaLib-6.5.tar.gz
    61beda590bfc5b4a12e979d5f2d70d7a  MesaLib-6.5.tar.bz2
    19d48b872d579d4f91466060804a59ac  MesaLib-6.5.zip
    694ad3a7007010c7418a9c72d1cba5b7  MesaDemos-6.5.tar.gz
    ab95b590dcd640726a2d89e62068c66e  MesaDemos-6.5.tar.bz2
    b792c303fefd87294488e2b7eab976e5  MesaDemos-6.5.zip
    ac1d585483617db0c91e5c15cb5ec3a3  MesaGLUT-6.5.tar.gz
    59f0bf2b2ffb67fe23ee479f9b044f31  MesaGLUT-6.5.tar.bz2
    005decb2136718e22222ac1c4805cd15  MesaGLUT-6.5.zip

## New Features

- OpenGL Shading language support
  This includes the GL_ARB_shader_objects, GL_ARB_shading_language_100, GL_ARB_vertex_shader and GL_ARB_fragment_shader extensions. Most of the work was done by Michal Krol. There's probably a fair number of bugs since this is a pretty large, complicated body of code.
  The OpenGL 2.0 interface to these features will be implemented in a future version of Mesa,
- GL_EXT_timer_query
  Used to measure the time of OpenGL operations at high precision. Only supported in the software/Xlib driver at this time.
- GL_EXT_packed_depth_stencil
  Defines a new GL_DEPTH_STENCIL_EXT pixel format.
- GL_EXT_framebuffer_blit
  A simplified glCopyPixels-like feature for copying pixel rectangles.
- GL_ARB_half_float_pixel
  Adds a new half-precision floating point format for image transfers, such as for glDrawPixels, glReadPixels, glTexImage, etc.

## Changes

- removed GL_HP_occlusion_test (use GL_ARB_occlusion_query instead)
- removed GL_SGIX/SGIS_pixel_texture extensions

## Bug fixes

- fixed glxcontextmodes.c datatype problem (bug 5835)
- fixed aix-gcc build/install bugs (bug 5874)
- fixed some bugs in texture env program generation
- glXCopyContext() didn't handle texture object bindings properly
- glXCopyContext() didn't copy all lighting state
- fixed FreeBSD config (Pedro Giffuni)
- fixed some minor framebuffer object bugs
- replaced dprintf() with _glu_printf() in GLU (bug 6244)
- fixed a number of thread safety bugs/regressions
- fixed a number of GLU tesselator bugs (John Shell, bug 6339)
- paletted texturing was broken w/ floating point palettes (K. Schultz)
- lots of assorted framebuffer object bug fixes

## Known Issues

- Rendering to depth textures will not work. Rendering to GL_DEPTH_STENCIL textures should work.

## Driver Interface Changes

- Stencil: The Driver.StencilOp/Func/Mask() functions have been replaced by the two-sided versions: Driver.Stencil*Separate().
- Render-to-texture: The functions for rendering to textures have changed.

## To Do (someday) items

- Switch to freeglut
- Increase MAX_DRAWBUFFERS
- Fix linux-glide target/driver.
- Fix lambda calculation for frag progs.

## Driver Status

    Driver			Status
    ----------------------	----------------------
    DRI drivers		varies with the driver
    XMesa/GLX (on Xlib)	implements OpenGL 1.5
    OSMesa (off-screen)	implements OpenGL 1.5
    Glide (3dfx Voodoo1/2)	implements OpenGL 1.3
    SVGA			implements OpenGL 1.3
    Wind River UGL		implements OpenGL 1.3
    Windows/Win32		implements OpenGL 1.5
    DJGPP			implements OpenGL 1.5
    GGI			implements OpenGL 1.3
    BeOS			implements OpenGL 1.5
    Allegro			needs updating
    D3D			needs updating