Mesa 4.0 release notes October 18, 2001 PLEASE READ!!!! Introduction ------------ Mesa uses an even/odd version number scheme like the Linux kernel. Odd numbered versions (such as 3.3) designate new developmental releases. Even numbered versions (such as 3.4) designate stable releases. Mesa version 4.0 signifies two things: 1. A stabilization of the 3.5 development release 2. Implementation of the OpenGL 1.3 specification Note that the Mesa major version number is incremented with the OpenGL minor version number: Mesa 1.x == OpenGL 1.0 Mesa 2.x == OpenGL 1.1 Mesa 3.x == OpenGL 1.2 Mesa 4.x == OpenGL 1.3 New Features ------------ Mesa 3.5 already had all the new features of OpenGL 1.3, implemented as extensions. These extensions were simply promoted to standard features: GL_ARB_multisample GL_ARB_multitexture GL_ARB_texture_border_clamp GL_ARB_texture_compression GL_ARB_texture_cube_map GL_ARB_texture_env_add GL_ARB_texture_env_combine GL_ARB_texture_env_dot3 GL_ARB_transpose_matrix In Mesa 4.0 the functions defined by these extensions are now available without the "ARB" suffix. For example, glLoadTransposeMatrixf() is now a standard API function. The new functions in OpenGL 1.3 and Mesa 4.0 are: glActiveTexture glClientActiveTexture glCompressedTexImage1D glCompressedTexImage2D glCompressedTexImage3D glCompressedTexSubImage1D glCompressedTexSubImage2D glCompressedTexSubImage3D glGetCompressedTexImage glLoadTransposeMatrixd glLoadTransposeMatrixf glMultiTexCoord1d glMultiTexCoord1dv glMultiTexCoord1f glMultiTexCoord1fv glMultiTexCoord1i glMultiTexCoord1iv glMultiTexCoord1s glMultiTexCoord1sv glMultiTexCoord2d glMultiTexCoord2dv glMultiTexCoord2f glMultiTexCoord2fv glMultiTexCoord2i glMultiTexCoord2iv glMultiTexCoord2s glMultiTexCoord2sv glMultiTexCoord3d glMultiTexCoord3dv glMultiTexCoord3f glMultiTexCoord3fv glMultiTexCoord3i glMultiTexCoord3iv glMultiTexCoord3s glMultiTexCoord3sv glMultiTexCoord4d glMultiTexCoord4dv glMultiTexCoord4f glMultiTexCoord4fv glMultiTexCoord4i glMultiTexCoord4iv glMultiTexCoord4s glMultiTexCoord4sv glMultTransposeMatrixd glMultTransposeMatrixf glSampleCoverage glSamplePass GLX 1.4 is the companion to OpenGL 1.3. The only new features in GLX 1.4 are support for multisampling and the GLX_ARB_get_proc_address extension. glXGetProcAddress() is the only new function in GLX 1.4. Multisample and Texture Compression ----------------------------------- The OpenGL 1.3 specification allows the multisample and texture compression features to essentially be no-ops. For example, if you query for multisample support you'll find none, but the API functions work. Similarly, texture compression is not implemented by any of the software drivers but you can specify a generic compressed texture format (like GL_COMPRESSED_RGBA) to glTexImage2D and it'll be accepted. Device Drivers -------------- Mesa advertises itself as either OpenGL 1.2 or OpenGL 1.3 depending on the device driver. If the driver enables all the ARB extensions which are part of OpenGL 1.3 then glGetString(GL_VERSION) will return "1.3". Otherwise, it'll return "1.2". A number of Mesa's software drivers haven't been actively maintained for some time. We rely on volunteers to maintain many of the drivers. Here's the current status of all included drivers: Driver Status ---------------------- --------------------- XMesa (Xlib) implements OpenGL 1.3 OSMesa (off-screen) implements OpenGL 1.3 FX (3dfx Voodoo1/2) implements OpenGL 1.3 SVGA implements OpenGL 1.3 Wind River UGL implements OpenGL 1.3 Windows/Win32 implements OpenGL 1.3 GGI needs updating DOS/DJGPP needs updating BeOS needs updating Allegro needs updating D3D needs updating DOS needs updating Special thanks go to Karl Schultz for updating the Windows driver. The XFree86/DRI drivers have not yet been updated to use Mesa 4.0 as of September 2001, but that should happen eventually. Other Changes ------------- See the VERSIONS file for more details about bug fixes, etc. in Mesa 4.0. ---------------------------------------------------------------------- $Id: RELNOTES-4.0,v 1.1.1.4 2004/08/12 23:43:27 anholt Exp $