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Diffstat (limited to 'mesalib/docs/relnotes/3.5')
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diff --git a/mesalib/docs/relnotes/3.5 b/mesalib/docs/relnotes/3.5 new file mode 100644 index 000000000..b2aa1b852 --- /dev/null +++ b/mesalib/docs/relnotes/3.5 @@ -0,0 +1,227 @@ + + Mesa 3.5 release notes + + June 21, 2001 + + PLEASE READ!!!! + + + +Introduction +------------ + +Mesa uses an even/odd version number scheme like the Linux kernel. +Odd numbered versions (such as 3.5) designate new developmental releases. +Even numbered versions (such as 3.4) designate stable releases. + +The biggest change in Mesa 3.5 is a complete overhaul of the source +code in order to make it more modular. This was driven by the DRI +hardware drivers. It simplifies the DRI drivers and opens the door +to hardware transform/clip/lighting (TCL). Keith Whitwell can take +the credit for that. + + + +Driver Support +-------------- + +The device driver interface in Mesa 3.5 has changed a lot since Mesa 3.4 +Not all of the older Mesa drivers have been updated. Here's the status: + +Driver Status +---------------------- ----------- +XMesa (Xlib) updated +OSMesa (off-screen) updated +FX (3dfx Voodoo1/2) updated +SVGA updated +GGI not updated +Windows/Win32 not updated +DOS/DJGPP not updated +BeOS not updated +Allegro not updated +D3D not updated +DOS not updated + +We're looking for volunteers to update the remaining drivers. Please +post to the Mesa3d-dev mailing list if you can help. + + + +GLU 1.3 +------- + +Mesa 3.5 includes the SGI Sample Implementation (SI) GLU library. +This version of GLU supports the GLU 1.3 specification. The old +Mesa GLU library implemented the 1.1 specification. The SI GLU +library should work much better. + +You'll need a C++ compiler to compile the SI GLU library. This may +be a problem on some systems. + + + +New Extensions +-------------- + +GL_EXT_convolution + Adds image convolution to glRead/Copy/DrawPixels/TexImage. + +GL_ARB_imaging + This is the optional imaging subset of OpenGL 1.2. + It's the GL_EXT_convolution, GL_HP_convolution_border_modes, + GL_EXT_histogram, GL_EXT_color_table, GL_EXT_color_subtable + GL_EXT_blend_color, GL_EXT_blend_minmax, GL_EXT_blend_subtract + and GL_SGI_color_matrix extensions all rolled together. + This is supported in all software renderers but not in all + hardware drivers (3dfx for example). + +GL_ARB_texture_compression + This is supported in Mesa but only used by the 3dfx DRI drivers + for Voodoo4 and later. + +GL_ARB_texture_env_add + This is identical to GL_EXT_texture_env_add. + +GL_NV_blend_square + Adds extra blend source and dest factors which allow squaring + of color values. + +GL_EXT_fog_coord + Allows specification of a per-vertex fog coordinate instead of + having fog always computed from the eye distance. + +GL_EXT_secondary_color + Allows specifying the secondary (specular) color for each vertex + instead of getting it only from lighting in GL_SEPARATE_SPECULAR_COLOR + mode. + +GL_ARB_texture_env_combine + Basically the same as GL_EXT_texture_env_combine + +GL_ARB_texture_env_add extension + Texture addition mode. + +GL_ARB_texture_env_dot3 extension + Dot product texture environment. + +GL_ARB_texture_border_clamp + Adds GL_CLAMP_TO_BORDER_ARB texture wrap mode + +GL_SGIX_depth_texture, GL_SGIX_shadow and GL_SGIX_shadow_ambient + Implements a shadow casting algorithm based on depth map textures + +GL_SGIS_generate_mipmap + Automatically generate lower mipmap images whenever the base mipmap + image is changed with glTexImage, glCopyTexImage, etc. + + + +libOSMesa.so +------------ + +libOSMesa.so is a new library which contains the OSMesa interface for +off-screen rendering. Apps which need the OSMesa interface should link +with both -lOSMesa and -lGL. This change was made so that stand-alone +Mesa works the same way as XFree86/DRI's libGL. + + + +Device Driver Changes / Core Mesa Changes +----------------------------------------- + +The ctx->Driver.LogicOp() function has been removed. It used to +be called during state update in order to determine if the driver +could do glLogicOp() operations, and if not, set the SWLogicOpEnabled +flag. Drivers should instead examine the LogicOp state themselves +and choose specialized point, line, and triangle functions appropriately, +or fall back to software rendering. The Xlib driver was the only driver +to use this function. And since the Xlib driver no longer draws +points, lines or triangles using Xlib, the LogicOp function isn't needed. + +The ctx->Driver.Dither() function has been removed. Drivers should +detect dither enable/disable via ctx->Driver.Enable() instead. + +The ctx->Driver.IndexMask() and ctx->Driver.ColorMask() functions +are now just called from glIndexMask and glColorMask like the other +GL state-changing functions. They are no longer called from inside +gl_update_state(). Also, they now return void. The change was made +mostly for sake of uniformity. + +The NEW_DRVSTATE[0123] flags have been removed. They weren't being used +and are obsolete w.r.t. the way state updates are done in DRI drivers. + + +Removed obsolete gl_create_visual() and gl_destroy_visual(). + +Renamed functions (new namespace): + +old new +gl_create_framebuffer _mesa_create_framebuffer +gl_destroy_framebuffer _mesa_destroy_framebuffer +gl_create_context _mesa_create_context +gl_destroy_context _mesa_destroy_context +gl_context_initialize _mesa_context_initialize +gl_copy_context _mesa_copy_context +gl_make_current _mesa_make_current +gl_make_current2 _mesa_make_current2 +gl_get_current_context _mesa_get_current_context +gl_flush_vb _mesa_flush_vb +gl_warning _mesa_warning +gl_compile_error _mesa_compile_error + + +All the drivers have been updated, but not all of them have been +tested since I can't test some platforms (DOS, Windows, Allegro, etc). + + +X/Mesa Driver +------------- + +The source files for the X/Mesa driver in src/X have been renamed. +The xmesa[1234].c files are gone. The new files are xm_api.c, +xm_dd.c, xm_line.c, xm_span.c and xm_tri.c. + + + +Multitexture +------------ + +Eight texture units are now supported by default. + + + +OpenGL SI related changes +------------------------- + +In an effort to make Mesa's internal interfaces more like the OpenGL +SI interfaces, a number of changes have been made: + +1. Importing the SI's glcore.h file which defines a number of +interface structures like __GLimports and __GLexports. + +2. Renamed "struct gl_context" to "struct __GLcontextRec". + +3. Added __glCoreCreateContext() and __glCoreNopDispatch() functions. + +4. The GLcontext member Visual is no longer a pointer. + +5. New file: imports.c to setup default import functions for Mesa. + + + + +16-bit color channels +--------------------- + +There's experimental support for 16-bit color channels (64-bit pixels) +in Mesa 3.5. Only the OSMesa interface can be used for 16-bit rendering. +Type "make linux-osmesa16" in the top-level directory to build the +special libOSMesa16.so library. + +This hasn't been tested very thoroughly yet so please file bug reports +if you have trouble. + +In the future I hope to implement support for 32-bit, floating point +color channels. + +---------------------------------------------------------------------- |