Mesa 6.5.3 Release Notes / April ??, 2007

Mesa 6.5.3 is a development release with many changes and new features. Mesa 7.0 is expected to follow shortly.

MD5 checksums

TBD

New features

• OpenGL 2.0 and 2.1 API support.
• Entirely new Shading Language code generator. See the Shading Language page for more information.
• Much faster software execution of vertex, fragment shaders.
• New vertex buffer object (vbo) infrastructure
• Updated glext.h file (version 39)
• Updated glxext.h file (version 18)
• GL_MAX_DRAWBUFFERS is now 4 (software rendering) so "multiple render targets" are really supported.

Bug fixes

• Fog was errantly applied when a fragment shader was enabled (bug 9346)
• glPush/PopClientAttrib didn't handle VBO bindings correctly (bug 9445)
• With 32-bit Z buffer, the fragment Z of lines and points was sometimes wrong.
• GL_POST_CONVOLUTION_ALPHA_BIAS/SCALE was broken.
• 1D convolution state could effect 2D image transfers
• Overlapping glCopyPixels with negative Y zoom didn't work (bug 10521)
• Fixed a number of framebuffer/renderbuffer reference counting bugs
• Fixed a few bugs in software-emulated alpha planes
• Assorted minor bug fixes in glCopy/DrawPixels, glPixelZoom, etc.
• Assorted DRI driver bug fixes.

Internal code changes

• Old array_cache module replaced by new vbo module. All geometry rendering is now cast in the form of vertex buffer objects.
• Massive changes to the Shading Language compiler and related state.
• Vertex/fragment shaders are compiled into GPU instructions and programs very similar to GL_ARB_vertex/fragment_program.
• Vertex and fragment programs are executed with the same code now.
• The SSE-optimized vertex program path has been removed since it didn't support more than 12 temp registers, didn't support branching/looping, etc.

To Do (someday) items

• Switch to freeglut
• Fix linux-glide target/driver.
• Improved lambda and derivative calculation for frag progs.

Driver Status

Driver			Status
----------------------	----------------------
DRI drivers		varies with the driver
XMesa/GLX (on Xlib)	implements OpenGL 2.1
OSMesa (off-screen)	implements OpenGL 2.1
Windows/Win32		implements OpenGL 1.5
Glide (3dfx Voodoo1/2)	implements OpenGL 1.3
SVGA			unsupported
Wind River UGL		unsupported
DJGPP			unsupported
GGI			unsupported
BeOS			unsupported
Allegro			unsupported
D3D			unsupported