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- /* -*- mode: C; tab-width:8; -*-
-
- fxapi.c - 3Dfx VooDoo/Mesa interface
- */
-
- /*
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- ********************************************************************
- *
- * Function names:
- * fxMesa.... (The driver API)
- * fxDD.... (Mesa device driver functions)
- * fxTM.... (Texture manager functions)
- * fxSetup.... (Voodoo units setup functions)
- * fx.... (Internal driver functions)
- *
- * Data type names:
- * fxMesa.... (Public driver data types)
- * tfx.... (Private driver data types)
- *
- ********************************************************************
- *
- *
- * V0.29 - David Bucciarelli (tech.hmw@plus.it) Humanware s.r.l.
- * - now glGetString(GL_RENDERER) returns more information
- * about the hardware configuration: "Mesa Glide <version>
- * <Voodoo_Graphics|Voodoo_Rush|UNKNOWN> <num> CARD/<num> FB/
- * <num> TM/<num> TMU/<NOSLI|SLI>"
- * where: <num> CARD is the card used for the current context,
- * <num> FB is the number of MB for the framebuffer,
- * <num> TM is the number of MB for the texture memory,
- * <num> TMU is the number of TMU. You can try to run
- * Mesa/demos/glinfo in order to have an example of the
- * output
- * - fixed a problem of the WGL emulator with the
- * OpenGL Optimizer 1.1 (thanks to Erwin Coumans for
- * the bug report)
- * - fixed some bug in the fxwgl.c code (thanks to
- * Peter Pettersson for a patch and a bug report)
- *
- * Theodore Jump (tjump@cais.com)
- * - written the SST_DUALHEAD support in the WGL emulator
- *
- * Daryll Strauss (daryll@harlot.rb.ca.us)
- * - fixed the Voodoo Rush support for the in window rendering
- *
- * V0.28 - David Bucciarelli (tech.hmw@plus.it) Humanware s.r.l.
- * - the only supported multitexture functions are GL_MODULATE
- * for texture set 0 and GL_MODULATE for texture set 1. In
- * all other cases, the driver falls back to pure software
- * rendering
- * - written the support for the new GL_EXT_multitexture
- * - written the DD_MAX_TEXTURE_COORD_SETS support in the
- * fxDDGetParameteri() function
- * - the driver falls back to pure software rendering when
- * texture mapping function is GL_BLEND
- *
- * V0.27 - David Bucciarelli (tech.hmw@plus.it) Humanware s.r.l.
- * - inluded in the Mesa-3.0beta5
- * - written a smal extension (GL_FXMESA_global_texture_lod_bias) in
- * order to expose the LOD bias related Glide function
- * - fixed a bug fxDDWriteMonoRGBAPixels()
- * - the driver is now able to fallback to software rendering in
- * any case not directly supported by the hardware
- * - written the support for enabling/disabling dithering
- * - the in-window-rendering hack now works with any X11 screen
- * depth
- * - fixed a problem related to color/depth/alpha buffer clears
- * - fixed a problem when clearing buffer for a context with the
- * alpha buffer
- * - fixed a problem in the fxTMReloadSubMipMapLevel() function,
- * I have forget a "break;" (thanks to Joe Waters for the bug report)
- * - fixed a problem in the color format for the in window
- * rendering hack
- * - written the fxDDReadRGBAPixels function
- * - written the fxDDDepthTestPixelsGeneric function
- * - written the fxDDDepthTestSpanGeneric function
- * - written the fxDDWriteMonoRGBAPixels function
- * - written the fxDDWriteRGBAPixels function
- * - removed the multitexture emulation code for Voodoo board
- * with only one TMU
- *
- * Chris Prince <cprince@cs.washington.edu>
- * - fixed a new bug in the wglUseFontBitmaps code
- *
- * Ralf Knoesel (rknoesel@Stormfront.com)
- * - fixed a bug in the wglUseFontBitmaps code
- *
- * Rune Hasvold (runeh@ifi.uio.no)
- * - fixed a problem related to the aux usage in the fxBestResolution
- * function
- * - fixed the order of pixel formats in the WGL emulator
- *
- * Fredrik Hubinette (hubbe@hubbe.net)
- * - the driver shutdown the Glide for most common signals
- *
- * V0.26 - David Bucciarelli (tech.hmw@plus.it) Humanware s.r.l.
- * - included in the Mesa-3.0beta4
- * - fixed a problem related to a my optimization for the Rune's
- * pixel-span optimization
- * - fixed a problem related to fxDDSetNearFar() and ctx->ProjectionMatrixType
- * (thanks to Ben "Ctrl-Alt-Delete" and the Raul Alonso's ssystem)
- * - fixed a small bug in the Rune's pixel-span optimization
- * - fixed a problem with GL_CCW (thanks to Curt Olson for and example
- * of the problem)
- * - grVertex setup code is now ready for the internal thread support
- * - fixed a no used optimization with clipped vertices in
- * grVertex setup code
- * - fixed a problem in the GL_LIGHT_MODEL_TWO_SIDE support (thanks
- * to Patrick H. Madden for a complete example of the bug)
- *
- * Rune Hasvold (runeh@ifi.uio.no)
- * - highly optimized the driver functions for writing pixel
- * span (2-3 times faster !)
- *
- * Axel W. Volley (volley@acm.org) Krauss-Maffei Wehrtechnik
- * - written the fxDDReadDepthSpanFloat() and fxDDReadDepthSpanInt()
- * functions
- *
- * V0.25 - David Bucciarelli (tech.hmw@plus.it) Humanware s.r.l.
- * - fixed a problem with Voodoo boards with only one TMU
- * - fixed a bug in the fxMesaCreateContext()
- * - now the GL_FRONT_AND_BACK works fine also with
- * the alpha buffer and/or antialiasing
- * - written the support for GL_FRONT_AND_BACK drawing but
- * it doesn't works with the alpha buffer and/or antialiasing
- * - fixed some bug in the Mesa core for glCopyTexSubImage
- * and glCopyTexImage functions (thanks to Mike Connell
- * for an example of the problem)
- * - make some small optimizations in the Mesa core in order
- * to save same driver call and state change for not very
- * well written applications
- * - introduced the NEW_DRVSTATE and make other optimizations
- * for minimizing state changes
- * - made a lot of optimizations in order to minimize state
- * changes
- * - it isn't more possible to create a context with the
- * depth buffer and the stancil buffer (it isn't yet supported)
- * - now the partial support for the Multitexture extension
- * works with Quake2 for windows
- * - vertex snap is not longer used for the Voodoo2 (FX_V2
- * must be defined)
- * - done a lot of cleanup in the fxsetup.c file
- * - now the partial support for the Multitexture extension
- * works with GLQuake for windows
- *
- * Dieter Nuetzel (nuetzel@kogs.informatik.uni-hamburg.de) University of Hamburg
- * - fixed a problem in the asm code for Linux of the fxvsetup.c file
- * highlighted by the binutils-2.8.1.0.29. 'fildw' asm instruction
- * changed in 'fild'
- *
- * Kevin Hester (kevinh@glassworks.net)
- * - written the wglUseFontBitmaps() function in the WGL emulator
- *
- * V0.24 - David Bucciarelli (tech.hmw@plus.it) Humanware s.r.l.
- * - now the drive always uses per fragment fog
- * - written a small optimization in the points drawing function
- * - written the support for trilinear filtering with 2 TMUs
- * - written the first partial support for the Multitexture extension.
- * This task is quite hard because the color combine units work after
- * the two texture combine units and not before as required by the
- * Multitexture extension
- * - written a workaround in fxBestResolution() in order to solve a
- * problem with bzflag (it asks for 1x1 window !)
- * - changed the fxBestResolution() behavior. It now returns the larger
- * screen resolution supported by the hardware (instead of 640x480)
- * when it is unable to find an appropriate resolution that is large
- * enough for the requested size
- * - the driver is now able to use also the texture memory attached to
- * second TMU
- * - the texture memory manager is now able to work with two TMUs and
- * store texture maps in the memory attached to TMU0, TMU1 or to split
- * the mimpmap levels across TMUs in order to support trilinear filtering
- * - I have bought a Voodoo2 board !
- * - the amount of frambuffer ram is now doubled when an SLI configuration
- * is detected
- * - solved a problem related to the fxDDTexParam() and fxTexInvalidate()
- * functions (thanks to Rune Hasvold for highlighting the problem)
- * - done some cleanup in the fxvsetup.c file, written
- * the FXVSETUP_FUNC macro
- * - done a lot of cleanup in data types and field names
- *
- * Rune Hasvold (runeh@ifi.uio.no)
- * - written the support for a right management of the auxiliary buffer.
- * You can now use an 800x600 screen without the depth and alpha
- * buffer
- * - written the support for a new pixel format (without the depth
- * and alpha buffer) in the WGL emulator
- * - fixed a bug in the window version of the GLUT (it was ever asking
- * for depth buffer)
- *
- * V0.23 - David Bucciarelli (tech.hmw@plus.it) Humanware s.r.l.
- * - included in the Mesa-3.0beta2 release
- * - written the support for the OpenGL 1.2 GL_TEXTURE_BASE_LEVEL
- * and GL_TEXTURE_MAX_LEVEL
- * - rewritten several functions for a more clean support of texture
- * mapping and in order to solve some bug
- * - the accumulation buffer works (it is bit slow beacuase it requires
- * to read/write from/to the Voodoo frame buffer but it works)
- * - fixed a bug in the fxDDReadRGBASpan driver function (the R and
- * B channels were read in the wrong order). Thanks to Jason Heym
- * for highlighting the problem
- * - written the support for multiple contexts on multiple boards.
- * you can now use the Mesa/Voodoo with multiple Voodoo Graphics
- * boards (for example with multiple screens or an HMD)
- * - the fxBestResolution() now check all available resolutions
- * and it is able to check the amount of framebuffer memory
- * before return a resolution
- * - modified the GLX/X11 driver in order to support all the
- * resolution available
- * - changed all function names. They should be now a bit more
- * readable
- * - written the Glide grVertex setup code for two TMU or
- * for Multitexture support with emulationa dn one TMU
- * - written the support for the new Mesa driver
- * function GetParametri
- * - small optimization/clean up in the texbind() function
- * - fixed a FPU precision problem for glOrtho and texture
- * mapping (thanks to Antti Juhani Huovilainen for an example
- * of the problem)
- * - written some small SGI OpenGL emulation code for the wgl,
- * the OpenGL Optimizer and Cosmo3D work fine under windows !
- * - moved the point/line/triangle/quad support in the fxmesa7.c
- * - fixed a bug in the clear_color_depth() (thanks to Henk Kok
- * for an example of the problem)
- * - written a small workaround for Linux GLQuake, it asks
- * for the alpha buffer and the depth buffer at the some time
- * (but it never uses the alpha buffer)
- * - checked the antialiasing points, lines and polygons support.
- * It works fine
- * - written the support for standard OpenGL antialiasing using
- * blending. Lines support works fine (tested with BZflag)
- * while I have still to check the polygons and points support
- * - written the support for the alpha buffer. The driver is now
- * able to use the Voodoo auxiliary buffer as an alpha buffer
- * instead of a depth buffer. Also all the OpenGL blending
- * modes are now supported. But you can't request a context
- * with an alpha buffer AND a depth buffer at the some time
- * (this is an hardware limitation)
- * - written the support for switching between the fullscreen
- * rendering and the in-window-rendering hack on the fly
- *
- * Rune Hasvold (runeh@ifi.uio.no)
- * - fixed a bug in the texparam() function
- *
- * Brian Paul (brianp@elastic.avid.com) Avid Technology
- * - sources accomodated for the new Mesa 3.0beta1
- *
- * V0.22 - David Bucciarelli (tech.hmw@plus.it) Humanware s.r.l.
- * - included with some v0.23 bug fix in the final release
- * of the Mesa-2.6
- * - written the support for the MESA_WGL_FX env. var. but
- * not tested because I have only Voodoo Graphics boards
- * - fixed a bug in the backface culling code
- * (thanks to David Farrell for an example of the problem)
- * - fixed the "Quake2 elevator" bug
- * - GL_POLYGONS with 3/4 vertices are now drawn as
- * GL_TRIANLGES/GL_QUADS (a small optimization for GLQuake)
- * - fixed a bug in fxmesa6.h for GL_LINE_LOOP
- * - fixed a NearFarStack bug in the Mesa when applications
- * directly call glLoadMatrix to load a projection matrix
- * - done some cleanup in the fxmesa2.c file
- * - the driver no longer translates the texture maps
- * when the Mesa internal format and the Voodoo
- * format are the some (usefull for 1 byte texture maps
- * where the driver can directly use the Mesa texture
- * map). Also the amount of used memory is halfed
- * - fixed a bug for GL_DECAL and GL_RGBA
- * - fixed a bug in the clear_color_depth()
- * - tested the v0.22 with the Mesa-2.6beta2. Impressive
- * performances improvement thanks to the new Josh's
- * asm code (+10fps in the isosurf demo, +5fps in GLQuake
- * TIMEREFRESH)
- * - written a optimized version of the RenderVB Mesa driver
- * function. The Voodoo driver is now able to upload polygons
- * in the most common cases at a very good speed. Good
- * performance improvement for large set of small polygons
- * - optimized the asm code for setting up the color information
- * in the Glide grVertex structure
- * - fixed a bug in the fxmesa2.c asm code (the ClipMask[]
- * wasn't working)
- *
- * Josh Vanderhoof (joshv@planet.net)
- * - removed the flush() function because it isn't required
- * - limited the maximum number of swapbuffers in the Voodoo
- * commands FIFO (controlled by the env. var. MESA_FX_SWAP_PENDING)
- *
- * Holger Kleemiss (holger.kleemiss@metronet.de) STN Atlas Elektronik GmbH
- * - applied some patch for the Voodoo Rush
- *
- * V0.21 - David Bucciarelli (tech.hmw@plus.it) Humanware s.r.l.
- * - the driver is now able to take advantage of the ClipMask[],
- * ClipOrMask and ClipAndMask information also under Windows
- * - introduced a new function in the Mesa driver interface
- * ClearColorAndDepth(). Now the glClear() function is
- * 2 times faster (!) when you have to clear the color buffer
- * and the depth buffer at some time
- * - written the first version of the fxRenderVB() driver
- * function
- * - optimized the glTexImage() path
- * - removed the fxMesaTextureUsePalette() support
- * - fixed a bug in the points support (thanks to David Farrell
- * for an example of the problem)
- * - written the optimized path for glSubTexImage(),
- * introduced a new function in the Mesa driver interface
- * TexSubImage(...)
- * - fixed a bug for glColorMask and glDepthMask
- * - the wbuffer is not more used. The Voodoo driver uses
- * a standard 16bit zbuffer in all cases. It is more consistent
- * and now GLQuake and GLQuake2test work also with a GL_ZTRICK 0
- * - the driver is now able to take advantage of the ClipMask[],
- * ClipOrMask and ClipAndMask information (under Linux);
- * - rewritten the setup_fx_units() function, now the texture
- * mapping support is compliant to the OpenGL specs (GL_BLEND
- * support is still missing). The LinuxGLQuake console correctly
- * fade in/out and transparent water of GLQuake2test works fine
- * - written the support for the env. var. FX_GLIDE_SWAPINTERVAL
- * - found a bug in the Mesa core. There is a roundup problem for
- * color values out of the [0.0,1.0] range
- *
- * Wonko <matt@khm.de>
- * - fixed a Voodoo Rush related problem in the fxwgl.c
- *
- * Daryll Strauss <daryll@harlot.rb.ca.us>
- * - written the scissor test support
- *
- * V0.20 - David Bucciarelli (tech.hmw@plus.it) Humanware s.r.l.
- * - written the closetmmanger() function in order to free all the memory
- * allocated by the Texture Memory Manager (it will be useful
- * when the support for multiple contexts/boards will be ready)
- * - now the Voodoo driver runs without printing any information,
- * define the env. var. MESA_FX_INFO if you want to read some
- * information about the hardware and some statistic
- * - written a small workaround for the "GLQuake multiplayer white box bug"
- * in the setup_fx_units() funxtions. I'm already rewriting
- * this function because it is the source of nearly all the current
- * Voodoo driver problems
- * - fixed the GLQuake texture misalignment problem (the texture
- * coordinates must be scaled between 0.0 and 256.0 and not
- * between 0.0 and 255.0)
- * - written the support for the GL_EXT_shared_texture_palette
- * - some small change for supporting the automatic building of the
- * OpenGL32.dll under the Windows platform
- * - the redefinition of a mipmap level is now a LOT faster. This path
- * is used by GLQuake for dynamic lighting with some call to glTexSubImage2D()
- * - the texture memory is now managed a set of 2MB blocks so
- * texture maps can't be allocated on a 2MB boundary. The new Pure3D
- * needs this kind of support (and probably any other Voodoo Graphics
- * board with more than 2MB of texture memory)
- *
- * Brian Paul (brianp@elastic.avid.com) Avid Technology
- * - added write_monocolor_span(), fixed bug in write_color_span()
- * - added test for stenciling in choosepoint/line/triangle functions
- *
- * Joe Waters (falc@attila.aegistech.com) Aegis
- * - written the support for the env. var. SST_SCREENREFRESH
- *
- * V0.19 - David Bucciarelli (tech.hmw@plus.it) Humanware s.r.l.
- * - written the 3Dfx Global Palette extension for GLQuake
- * - written the support for the GL_EXT_paletted_texture (it works only with GL_RGBA
- * palettes and the alpha value is ignored ... this is a limitation of the
- * the current Glide version and Voodoo hardware)
- * - fixed the amount of memory allocated for 8bit textures
- * - merged the under construction v0.19 driver with the Mesa 2.5
- * - finally written the support for deleting textures
- * - introduced a new powerful texture memory manager: the texture memory
- * is used as a cache of the set of all defined texture maps. You can
- * now define several MB of texture maps also with a 2MB of texture memory
- * (the texture memory manager will do automatically all the swap out/swap in
- * work). The new texture memory manager has also
- * solved a lot of other bugs/no specs compliance/problems
- * related to the texture memory usage. The texture
- * manager code is inside the new fxmesa3.c file
- * - broken the fxmesa.c file in two files (fxmesa1.c and fxmesa2.c)
- * and done some code cleanup
- * - now is possible to redefine texture mipmap levels already defined
- * - fixed a problem with the amount of texture memory allocated for textures
- * with not all mipmap levels defined
- * - fixed a small problem with single buffer rendering
- *
- * Brian Paul (brianp@elastic.avid.com) Avid Technology
- * - read/write_color_span() now use front/back buffer correctly
- * - create GLvisual with 5,6,5 bits per pixel, not 8,8,8
- * - removed a few ^M characters from fxmesa2.c file
- *
- * V0.18 - David Bucciarelli (tech.hmw@plus.it) Humanware s.r.l.
- * - the Mesa-2.4beta3 is finally using the driver quads support (the
- * previous Mesa versions have never taken any advantage from the quads support !)
- * - tested with the Glide 2.4 for Win
- * - ported all asm code to Linux
- * - ported the v0.18 to Linux (without asm code)
- * - back to Linux !!!
- * - optimized the SETUP macro (no more vertex snap for points and lines)
- * - optimized the SETUP macro (added one argument)
- * - the Mesa/Voodoo is now 20/30% for points, lines and small triangles !
- * - performance improvement setting VBSIZE to 72
- * - the GrVertex texture code is now written in asm
- * - the GrVertex zbuffer code is now written in asm
- * - the GrVertex wbuffer code is now written in asm
- * - the GrVertex gouraud code is now written in asm
- * - the GrVertex snap code is now written in asm
- * - changed the 8bit compressed texture maps in 8bit palette texture maps
- * support (it has the some advantage of compressed texture maps without the
- * problem of a fixed NCC table for all mipmap levels)
- * - written the support for 8bit compressed texture maps (but texture maps with
- * more than one mipmap level aren't working fine)
- * - finnaly everthing is working fine in MesaQuake !
- * - fixed a bug in the computation of texture mapping coordinates (I have found
- * the bug thanks to MesaQuake !)
- * - written the GL_REPLACE support (mainly for MesaQuake)
- * - written the support for textures with not all mipmap levels defined
- * - rewritten all the Texture memory stuff
- * - written the MesaQuake support (define MESAQUAKE)
- * - working with a ZBuffer if glOrtho or not int the default glDepthRange,
- * otherwise working with the WBuffer
- * written the glDepthRange support
- *
- * Diego Picciani (d.picciani@novacomp.it) Nova Computer s.r.l.
- * - written the fxCloseHardware() and the fxQuaryHardware() (mainly
- * for the VoodooWGL emulator)
- *
- * Brian Paul (brianp@elastic.avid.com) Avid Technology
- * - implemented read/write_color_span() so glRead/DrawPixels() works
- * - now needs Glide 2.3 or later. Removed GLIDE_FULL_SCREEN and call to grSstOpen()
- *
- * V0.17 - David Bucciarelli (tech.hmw@plus.it) Humanware s.r.l.
- * - optimized the bitmap support (66% faster)
- * - tested with the Mesa 2.3beta2
- *
- * Diego Picciani (d.picciani@novacomp.it) Nova Computer s.r.l.
- * - solved a problem with the drawbitmap() and the Voodoo Rush
- * (GR_ORIGIN_LOWER_LEFT did not work with the Stingray)
- *
- * Brian Paul (brianp@elastic.avid.com) Avid Technology
- * - linux stuff
- * - general code clean-up
- * - added attribList parameter to fxMesaCreateContext()
- * - single buffering works now
- * - VB colors are now GLubytes, removed ColorShift stuff
- *
- * Paul Metzger
- * - linux stuff
- *
- * V0.16 - David Bucciarelli (tech.hmw@plus.it) Humanware s.r.l.
- * - written the quadfunc support (no performance improvement)
- * - written the support for the new Mesa 2.3beta1 driver interface (Wow ! It is faaaster)
- * - rewritten the glBitmap support for the Glide 2.3 (~35% slower !)
- * - written the glBitmap support for the most common case (fonts)
- *
- * Jack Palevich
- * - Glide 2.3 porting
- *
- * Diego Picciani (d.picciani@novacomp.it) Nova Computer s.r.l.
- * - extended the fxMesaCreateContext() and fxMesaCreateBestContext()
- * functions in order to support also the Voodoo Rush
- * - tested with the Hercules Stingray 128/3D (The rendering in a window works !)
- *
- * V0.15 - David Bucciarelli (tech.hmw@plus.it) Humanware s.r.l.
- * - written the GL_LUMINANCE_ALPHA support
- * - written the GL_ALPHA support
- * - written the GL_LUMINANCE support
- * - now SETUP correctly set color for mono color sequences
- * - written the 9x1,10x1,...,1x9,1x10,... texture map ratio support
- * - written the no square texture map support
- * - the fog table is no more rebuilt inside setup_fx_units() each time
- *
- * Henri Fousse (arnaud@pobox.oleane.com) Thomson Training & Simulation
- * - written (not yet finished: no texture mapping) support for glOrtho
- * - some change to setup functions
- * - the fog support is now fully compatible with the standard OpenGL
- * - rewritten several parts of the driver in order to take
- * advantage of meshes (40% faster !!!)
- *
- * V0.14 - David Bucciarelli (tech.hmw@plus.it) Humanware s.r.l.
- * - now glAlphaFunc() works
- * - now glDepthMask() works
- * - solved a mipmap problem when using more than one texture
- * - moved ti, texid and wscale inside the fxMesaContext (now we can
- * easy support more ctx and more boards)
- * - the management of the fxMesaContext was completly broken !
- * - solved several problems about Alpha and texture Alpha
- * - 4 (RGBA) texture channels supported
- * - setting the default color to white
- *
- * Henri Fousse (arnaud@pobox.oleane.com) Thomson Training & Simulation
- * - small change to fxMesaCreateContext() and fxMesaMakeCurrent()
- * - written the fog support
- * - setting the default clear color to black
- * - written cleangraphics() for the onexit() function
- * - written fxMesaCreateBestContext()
- *
- * V0.13 - David Bucciarelli (tech.hmw@plus.it) Humanware s.r.l.
- * - now glBlendFunc() works for all glBlendFunc without DST_ALPHA
- * (because the alpha buffer is not yet implemented)
- * - now fxMesaCreateContext() accept resolution and refresh rate
- * - fixed a bug for texture mapping: the w (alias z) must be set
- * also without depth buffer
- * - fixed a bug for texture image with width!=256
- * - written texparam()
- * - written all point, line and triangle functions for all possible supported
- * contexts and the driver is slight faster with points, lines and small triangles
- * - fixed a small bug in fx/fxmesa.h (glOrtho)
- *
- * V0.12 - David Bucciarelli (tech.hmw@plus.it) Humanware s.r.l.
- * - glDepthFunc supported
- * - introduced a trick to discover the far plane distance
- * (see fxMesaSetFar and fx/fxmesa.h)
- * - now the wbuffer works with homogeneous coordinate (and it
- * doesn't work with a glOrtho projection :)
- * - solved several problems with homogeneous coordinate and texture mapping
- * - fixed a bug in all line functions
- * - fixed a clear framebuffer bug
- * - solved a display list/teximg problem (but use
- * glBindTexture: it is several times faster)
- *
- * V0.11 - David Bucciarelli (tech.hmw@plus.it) Humanware s.r.l.
- * - introduced texture mapping support (not yet finished !)
- * - tested with Mesa2.2b6
- * - the driver is faster
- * - written glFlush/glFinish
- * - the driver print a lot of info about the Glide lib
- *
- * v0.1 - David Bucciarelli (tech.hmw@plus.it) Humanware s.r.l.
- * - Initial revision
- *
- */
-
- #if defined(FX)
-
- #include "fxdrv.h"
-
- fxMesaContext fxMesaCurrentCtx=NULL;
-
- /*
- * Status of 3Dfx hardware initialization
- */
-
- static int glbGlideInitialized=0;
- static int glb3DfxPresent=0;
- static int glbTotNumCtx=0;
-
- GrHwConfiguration glbHWConfig;
- int glbCurrentBoard=0;
-
- /*
- * Select the Voodoo board to use when creating
- * a new context.
- */
-
- GLboolean APIENTRY fxMesaSelectCurrentBoard(int n)
- {
- fxQueryHardware();
-
- if((n<0) || (n>=glbHWConfig.num_sst))
- return GL_FALSE;
-
- glbCurrentBoard=n;
-
- return GL_TRUE;
- }
-
-
- fxMesaContext APIENTRY fxMesaGetCurrentContext(void)
- {
- return fxMesaCurrentCtx;
- }
-
-
- void APIENTRY fxMesaSetNearFar(GLfloat n, GLfloat f)
- {
- if(fxMesaCurrentCtx)
- fxDDSetNearFar(fxMesaCurrentCtx->glCtx,n,f);
- }
-
-
- /*
- * The extension GL_FXMESA_global_texture_lod_bias
- */
- void APIENTRY glGlobalTextureLODBiasFXMESA(GLfloat biasVal)
- {
- grTexLodBiasValue(GR_TMU0,biasVal);
-
- if(fxMesaCurrentCtx->haveTwoTMUs)
- grTexLodBiasValue(GR_TMU1,biasVal);
- }
-
-
- /*
- * The 3Dfx Global Palette extension for GLQuake.
- * More a trick than a real extesion, use the shared global
- * palette extension.
- */
- void APIENTRY gl3DfxSetPaletteEXT(GLuint *pal)
- {
- #if defined(DEBUG_FXMESA)
- int i;
-
- fprintf(stderr,"fxmesa: gl3DfxSetPaletteEXT()\n");
-
- for(i=0;i<256;i++)
- fprintf(stderr,"%x\n",pal[i]);
- #endif
-
- if(fxMesaCurrentCtx) {
- fxMesaCurrentCtx->haveGlobalPaletteTexture=1;
-
- grTexDownloadTable(GR_TMU0,GR_TEXTABLE_PALETTE,(GuTexPalette *)pal);
-
- if(fxMesaCurrentCtx->haveTwoTMUs)
- grTexDownloadTable(GR_TMU1,GR_TEXTABLE_PALETTE,(GuTexPalette *)pal);
- }
- }
-
-
- static GrScreenResolution_t fxBestResolution(int width, int height, int aux)
- {
- static int resolutions[][5]={
- { 512, 384, GR_RESOLUTION_512x384, 2, 2 },
- { 640, 400, GR_RESOLUTION_640x400, 2, 2 },
- { 640, 480, GR_RESOLUTION_640x480, 2, 2 },
- { 800, 600, GR_RESOLUTION_800x600, 4, 2 },
- { 960, 720, GR_RESOLUTION_960x720, 6, 4 }
- #ifdef GR_RESOLUTION_1024x768
- ,{ 1024, 768, GR_RESOLUTION_1024x768, 8, 4 }
- #endif
- };
- int NUM_RESOLUTIONS = sizeof(resolutions) / (sizeof(int)*5);
- int i,fbmem;
- GrScreenResolution_t lastvalidres;
-
- fxQueryHardware();
-
- if(glbHWConfig.SSTs[glbCurrentBoard].type==GR_SSTTYPE_VOODOO) {
- fbmem=glbHWConfig.SSTs[glbCurrentBoard].sstBoard.VoodooConfig.fbRam;
-
- if(glbHWConfig.SSTs[glbCurrentBoard].sstBoard.VoodooConfig.sliDetect)
- fbmem*=2;
- } else if(glbHWConfig.SSTs[glbCurrentBoard].type==GR_SSTTYPE_SST96)
- fbmem=glbHWConfig.SSTs[glbCurrentBoard].sstBoard.SST96Config.fbRam;
- else
- fbmem=2;
-
- /* A work around for BZFlag */
-
- if((width==1) && (height==1)) {
- width=640;
- height=480;
- }
-
- for(i=0;i<NUM_RESOLUTIONS;i++)
- if(resolutions[i][4-aux]<=fbmem) {
- if((width<=resolutions[i][0]) && (height<=resolutions[i][1]))
- return resolutions[i][2];
-
- lastvalidres=resolutions[i][2];
- }
-
- return lastvalidres;
- }
-
-
- fxMesaContext APIENTRY fxMesaCreateBestContext(GLuint win,GLint width, GLint height,
- const GLint attribList[])
- {
- GrScreenRefresh_t refresh;
- int i;
- int res,aux;
- refresh=GR_REFRESH_75Hz;
-
- if(getenv("SST_SCREENREFRESH")) {
- if(!strcmp(getenv("SST_SCREENREFRESH"),"60"))
- refresh=GR_REFRESH_60Hz;
- if(!strcmp(getenv("SST_SCREENREFRESH"),"70"))
- refresh=GR_REFRESH_70Hz;
- if(!strcmp(getenv("SST_SCREENREFRESH"),"72"))
- refresh=GR_REFRESH_72Hz;
- if(!strcmp(getenv("SST_SCREENREFRESH"),"75"))
- refresh=GR_REFRESH_75Hz;
- if(!strcmp(getenv("SST_SCREENREFRESH"),"80"))
- refresh=GR_REFRESH_80Hz;
- if(!strcmp(getenv("SST_SCREENREFRESH"),"85"))
- refresh=GR_REFRESH_85Hz;
- if(!strcmp(getenv("SST_SCREENREFRESH"),"90"))
- refresh=GR_REFRESH_90Hz;
- if(!strcmp(getenv("SST_SCREENREFRESH"),"100"))
- refresh=GR_REFRESH_100Hz;
- if(!strcmp(getenv("SST_SCREENREFRESH"),"120"))
- refresh=GR_REFRESH_120Hz;
- }
-
- aux=0;
- for(i=0;attribList[i]!=FXMESA_NONE;i++)
- if((attribList[i]==FXMESA_ALPHA_SIZE) ||
- (attribList[i]==FXMESA_DEPTH_SIZE)) {
- if(attribList[++i]>0) {
- aux=1;
- break;
- }
- }
-
- res=fxBestResolution(width,height,aux);
-
- return fxMesaCreateContext(win,res,refresh,attribList);
- }
-
-
- /*
- * Create a new FX/Mesa context and return a handle to it.
- */
- fxMesaContext APIENTRY fxMesaCreateContext(GLuint win,GrScreenResolution_t res,
- GrScreenRefresh_t ref,
- const GLint attribList[])
- {
- fxMesaContext fxMesa;
- int i,type;
- int aux;
- GLboolean doubleBuffer=GL_FALSE;
- GLboolean alphaBuffer=GL_FALSE;
- GLboolean verbose=GL_FALSE;
- GLint depthSize=0;
- GLint stencilSize=0;
- GLint accumSize=0;
-
- #if defined(DEBUG_FXMESA)
- fprintf(stderr,"fxmesa: fxMesaCreateContext() Start\n");
- #endif
-
- if(getenv("MESA_FX_INFO"))
- verbose=GL_TRUE;
-
- aux=0;
- i=0;
- while(attribList[i]!=FXMESA_NONE) {
- switch (attribList[i]) {
- case FXMESA_DOUBLEBUFFER:
- doubleBuffer=GL_TRUE;
- break;
- case FXMESA_ALPHA_SIZE:
- i++;
- alphaBuffer=attribList[i]>0;
- if(alphaBuffer)
- aux=1;
- break;
- case FXMESA_DEPTH_SIZE:
- i++;
- depthSize=attribList[i];
- if(depthSize)
- aux=1;
- break;
- case FXMESA_STENCIL_SIZE:
- i++;
- stencilSize=attribList[i];
- break;
- case FXMESA_ACCUM_SIZE:
- i++;
- accumSize=attribList[i];
- break;
- default:
- #if defined(DEBUG_FXMESA)
- fprintf(stderr,"fxmesa: fxMesaCreateContext() End (defualt)\n");
- #endif
- return NULL;
- }
- i++;
- }
-
- /* A workaround for Linux GLQuake */
- if(depthSize && alphaBuffer)
- alphaBuffer=0;
-
- if(verbose)
- fprintf(stderr,"Mesa fx Voodoo Device Driver v0.29\nWritten by David Bucciarelli (tech.hmw@plus.it)\n");
-
- if((type=fxQueryHardware()) >= 0) {
- if(type==GR_SSTTYPE_VOODOO)
- win=0;
-
- grSstSelect(glbCurrentBoard);
-
- if(!grSstWinOpen((FxU32)win,res,ref,
- GR_COLORFORMAT_ABGR,GR_ORIGIN_LOWER_LEFT,2,aux)) {
- #if defined(DEBUG_FXMESA)
- fprintf(stderr,"fxmesa: fxMesaCreateContext() End (grSstWinOpen)\n");
- #endif
- return NULL;
- }
-
- if(verbose)
- fprintf(stderr,"Glide screen size: %dx%d\n",
- (int)grSstScreenWidth(),(int)grSstScreenHeight());
- } else {
- fprintf(stderr,"fx Driver: ERROR no Voodoo1/2 Graphics or Voodoo Rush !\n");
- return NULL;
- }
-
- fxMesa=(fxMesaContext)malloc(sizeof(struct tfxMesaContext));
- if(!fxMesa) {
- #if defined(DEBUG_FXMESA)
- fprintf(stderr,"fxmesa: fxMesaCreateContext() End (malloc)\n");
- #endif
- return NULL;
- }
-
- fxMesa->board=glbCurrentBoard;
- fxMesa->width=grSstScreenWidth();
- fxMesa->height=grSstScreenHeight();
-
- fxMesa->verbose=verbose;
-
- if(glbHWConfig.SSTs[glbCurrentBoard].type==GR_SSTTYPE_VOODOO)
- fxMesa->haveTwoTMUs=(glbHWConfig.SSTs[glbCurrentBoard].sstBoard.VoodooConfig.nTexelfx > 1);
- else if(glbHWConfig.SSTs[glbCurrentBoard].type==GR_SSTTYPE_SST96)
- fxMesa->haveTwoTMUs=(glbHWConfig.SSTs[glbCurrentBoard].sstBoard.SST96Config.nTexelfx > 1);
- else
- fxMesa->haveTwoTMUs=GL_FALSE;
-
- fxMesa->haveDoubleBuffer=doubleBuffer;
- fxMesa->haveAlphaBuffer=alphaBuffer;
- fxMesa->haveGlobalPaletteTexture=GL_FALSE;
-
- if(getenv("FX_GLIDE_SWAPINTERVAL"))
- fxMesa->swapInterval=atoi(getenv("FX_GLIDE_SWAPINTERVAL"));
- else
- fxMesa->swapInterval=1;
-
- if(getenv("MESA_FX_SWAP_PENDING"))
- fxMesa->maxPendingSwapBuffers=atoi(getenv("MESA_FX_SWAP_PENDING"));
- else
- fxMesa->maxPendingSwapBuffers=2;
-
- fxMesa->color=FXCOLOR(255,255,255,255);
- fxMesa->clearC=0;
- fxMesa->clearA=0;
-
- fxMesa->stats.swapBuffer=0;
- fxMesa->stats.reqTexUpload=0;
- fxMesa->stats.texUpload=0;
- fxMesa->stats.memTexUpload=0;
-
- fxMesa->tmuSrc=FX_TMU_NONE;
- fxMesa->lastUnitsMode=FX_UM_NONE;
- fxTMInit(fxMesa);
-
- grColorMask(FXTRUE,alphaBuffer ? FXTRUE : FXFALSE);
- if(doubleBuffer) {
- fxMesa->currentFB=GR_BUFFER_BACKBUFFER;
- grRenderBuffer(GR_BUFFER_BACKBUFFER);
- } else {
- fxMesa->currentFB=GR_BUFFER_FRONTBUFFER;
- grRenderBuffer(GR_BUFFER_FRONTBUFFER);
- }
-
- if(depthSize) {
- grDepthMask(FXTRUE);
- grDepthBufferMode(GR_DEPTHBUFFER_ZBUFFER);
- }
-
- grLfbWriteColorFormat(GR_COLORFORMAT_ABGR);
-
- fxMesa->glVis=gl_create_visual(GL_TRUE, /* RGB mode */
- alphaBuffer,
- doubleBuffer,
- GL_FALSE, /* stereo */
- depthSize, /* depth_size */
- stencilSize, /* stencil_size */
- accumSize, /* accum_size */
- 0, /* index bits */
- 5,6,5,0); /* RGBA bits */
-
- fxMesa->glCtx=gl_create_context(fxMesa->glVis,
- NULL, /* share list context */
- (void *) fxMesa, GL_TRUE);
-
- fxMesa->glBuffer=gl_create_framebuffer(fxMesa->glVis);
-
- fxSetupDDPointers(fxMesa->glCtx);
-
- fxDDSetNearFar(fxMesa->glCtx,1.0,100.0);
-
- grGlideGetState(&fxMesa->state);
-
- glbTotNumCtx++;
-
- #if defined(DEBUG_FXMESA)
- fprintf(stderr,"fxmesa: fxMesaCreateContext() End\n");
- #endif
-
- return fxMesa;
- }
-
-
- /*
- * Function to set the new window size in the context (mainly for the Voodoo Rush)
- */
- void APIENTRY fxMesaUpdateScreenSize(fxMesaContext fxMesa)
- {
- fxMesa->width=grSstScreenWidth();
- fxMesa->height=grSstScreenHeight();
- }
-
-
- /*
- * Destroy the given FX/Mesa context.
- */
- void APIENTRY fxMesaDestroyContext(fxMesaContext fxMesa)
- {
- #if defined(DEBUG_FXMESA)
- fprintf(stderr,"fxmesa: fxMesaDestroyContext()\n");
- #endif
-
- if(fxMesa) {
- gl_destroy_visual(fxMesa->glVis);
- gl_destroy_context(fxMesa->glCtx);
- gl_destroy_framebuffer(fxMesa->glBuffer);
-
- glbTotNumCtx--;
-
- fxCloseHardware();
-
- if(fxMesa->verbose) {
- fprintf(stderr,"Misc Stats:\n");
- fprintf(stderr," # swap buffer: %u\n",fxMesa->stats.swapBuffer);
-
- if(!fxMesa->stats.swapBuffer)
- fxMesa->stats.swapBuffer=1;
-
- fprintf(stderr,"Textures Stats:\n");
- fprintf(stderr," Free texture memory on TMU0: %d:\n",fxMesa->freeTexMem[FX_TMU0]);
- if(fxMesa->haveTwoTMUs)
- fprintf(stderr," Free texture memory on TMU1: %d:\n",fxMesa->freeTexMem[FX_TMU1]);
- fprintf(stderr," # request to TMM to upload a texture objects: %u\n",
- fxMesa->stats.reqTexUpload);
- fprintf(stderr," # request to TMM to upload a texture objects per swapbuffer: %.2f\n",
- fxMesa->stats.reqTexUpload/(float)fxMesa->stats.swapBuffer);
- fprintf(stderr," # texture objects uploaded: %u\n",
- fxMesa->stats.texUpload);
- fprintf(stderr," # texture objects uploaded per swapbuffer: %.2f\n",
- fxMesa->stats.texUpload/(float)fxMesa->stats.swapBuffer);
- fprintf(stderr," # MBs uploaded to texture memory: %.2f\n",
- fxMesa->stats.memTexUpload/(float)(1<<20));
- fprintf(stderr," # MBs uploaded to texture memory per swapbuffer: %.2f\n",
- (fxMesa->stats.memTexUpload/(float)fxMesa->stats.swapBuffer)/(float)(1<<20));
- }
-
- fxTMClose(fxMesa);
-
- free(fxMesa);
- }
-
- if(fxMesa==fxMesaCurrentCtx)
- fxMesaCurrentCtx=NULL;
- }
-
-
- /*
- * Make the specified FX/Mesa context the current one.
- */
- void APIENTRY fxMesaMakeCurrent(fxMesaContext fxMesa)
- {
- #if defined(DEBUG_FXMESA)
- fprintf(stderr,"fxmesa: fxMesaMakeCurrent(...) Start\n");
- #endif
-
- if(!fxMesa) {
- gl_make_current(NULL,NULL);
- fxMesaCurrentCtx=NULL;
-
- #if defined(DEBUG_FXMESA)
- fprintf(stderr,"fxmesa: fxMesaMakeCurrent(NULL) End\n");
- #endif
-
- return;
- }
-
- if(fxMesaCurrentCtx==fxMesa) {
- #if defined(DEBUG_FXMESA)
- fprintf(stderr,"fxmesa: fxMesaMakeCurrent(fxMesaCurrentCtx==fxMesa) End\n");
- #endif
-
- return;
- }
-
-
- if(fxMesaCurrentCtx)
- grGlideGetState(&fxMesaCurrentCtx->state);
-
- fxMesaCurrentCtx=fxMesa;
-
- grSstSelect(fxMesa->board);
- grGlideSetState(&fxMesa->state);
-
- gl_make_current(fxMesa->glCtx,fxMesa->glBuffer);
-
- fxSetupDDPointers(fxMesa->glCtx);
-
- /* The first time we call MakeCurrent we set the initial viewport size */
- if(fxMesa->glCtx->Viewport.Width==0)
- gl_Viewport(fxMesa->glCtx,0,0,fxMesa->width,fxMesa->height);
-
- #if defined(DEBUG_FXMESA)
- fprintf(stderr,"fxmesa: fxMesaMakeCurrent(...) End\n");
- #endif
- }
-
-
- /*
- * Swap front/back buffers for current context if double buffered.
- */
- void APIENTRY fxMesaSwapBuffers(void)
- {
- #if defined(DEBUG_FXMESA)
- fprintf(stderr,"fxmesa: ------------------------------- fxMesaSwapBuffers() -------------------------------\n");
- #endif
-
- if(fxMesaCurrentCtx)
- if(fxMesaCurrentCtx->haveDoubleBuffer) {
- grBufferSwap(fxMesaCurrentCtx->swapInterval);
-
- /*
- * Don't allow swap buffer commands to build up!
- */
- while(grBufferNumPending()>fxMesaCurrentCtx->maxPendingSwapBuffers);
-
- fxMesaCurrentCtx->stats.swapBuffer++;
- }
- }
-
-
- #if defined(__WIN32__)
- static int cleangraphics(void)
- {
- glbTotNumCtx=1;
- fxMesaDestroyContext(fxMesaCurrentCtx);
-
- return 0;
- }
- #elif defined(__linux__)
- static void cleangraphics(void)
- {
- glbTotNumCtx=1;
- fxMesaDestroyContext(fxMesaCurrentCtx);
- }
-
- static void cleangraphics_handler(int s)
- {
- fprintf(stderr,"fxmesa: Received a not handled signal %d\n",s);
-
- cleangraphics();
- exit(-1);
- }
- #endif
-
-
- /*
- * Query 3Dfx hardware presence/kind
- */
- int APIENTRY fxQueryHardware(void)
- {
- #if defined(DEBUG_FXMESA)
- fprintf(stderr,"fxmesa: fxQueryHardware() Start\n");
- #endif
-
- if(!glbGlideInitialized) {
- grGlideInit();
- if(grSstQueryHardware(&glbHWConfig)) {
- grSstSelect(glbCurrentBoard);
- glb3DfxPresent=1;
-
- if(getenv("MESA_FX_INFO")) {
- char buf[80];
-
- grGlideGetVersion(buf);
- fprintf(stderr,"Using Glide V%s\n",buf);
- fprintf(stderr,"Number of boards: %d\n",glbHWConfig.num_sst);
-
- if(glbHWConfig.SSTs[glbCurrentBoard].type==GR_SSTTYPE_VOODOO) {
- fprintf(stderr,"Framebuffer RAM: %d\n",
- glbHWConfig.SSTs[glbCurrentBoard].sstBoard.VoodooConfig.sliDetect ?
- (glbHWConfig.SSTs[glbCurrentBoard].sstBoard.VoodooConfig.fbRam*2) :
- glbHWConfig.SSTs[glbCurrentBoard].sstBoard.VoodooConfig.fbRam);
- fprintf(stderr,"Number of TMUs: %d\n",
- glbHWConfig.SSTs[glbCurrentBoard].sstBoard.VoodooConfig.nTexelfx);
- fprintf(stderr,"SLI detected: %d\n",
- glbHWConfig.SSTs[glbCurrentBoard].sstBoard.VoodooConfig.sliDetect);
- } else if(glbHWConfig.SSTs[glbCurrentBoard].type==GR_SSTTYPE_SST96) {
- fprintf(stderr,"Framebuffer RAM: %d\n",
- glbHWConfig.SSTs[glbCurrentBoard].sstBoard.SST96Config.fbRam);
- fprintf(stderr,"Number of TMUs: %d\n",
- glbHWConfig.SSTs[glbCurrentBoard].sstBoard.SST96Config.nTexelfx);
- }
-
- }
- } else
- glb3DfxPresent=0;
-
- glbGlideInitialized=1;
-
- #if defined(__WIN32__)
- onexit((_onexit_t)cleangraphics);
- #elif defined(__linux__)
- atexit(cleangraphics);
-
- signal(SIGINT,cleangraphics_handler);
- signal(SIGHUP,cleangraphics_handler);
- signal(SIGPIPE,cleangraphics_handler);
- signal(SIGFPE,cleangraphics_handler);
- signal(SIGBUS,cleangraphics_handler);
- signal(SIGILL,cleangraphics_handler);
- signal(SIGSEGV,cleangraphics_handler);
- signal(SIGTERM,cleangraphics_handler);
- #endif
- }
-
- if(!glb3DfxPresent) {
- #if defined(DEBUG_FXMESA)
- fprintf(stderr,"fxmesa: fxQueryHardware() End (-1)\n");
- #endif
- return(-1);
- }
-
- #if defined(DEBUG_FXMESA)
- fprintf(stderr,"fxmesa: fxQueryHardware() End (voodooo)\n");
- #endif
- return(glbHWConfig.SSTs[glbCurrentBoard].type);
- }
-
-
- /*
- * Shutdown Glide library
- */
- void APIENTRY fxCloseHardware(void)
- {
- if(glbGlideInitialized) {
- if(getenv("MESA_FX_INFO")) {
- GrSstPerfStats_t st;
-
- grSstPerfStats(&st);
- fprintf(stderr,"Pixels Stats:\n");
- fprintf(stderr," # pixels processed (minus buffer clears): %u\n",(unsigned)st.pixelsIn);
- fprintf(stderr," # pixels not drawn due to chroma key test failure: %u\n",(unsigned)st.chromaFail);
- fprintf(stderr," # pixels not drawn due to depth test failure: %u\n",(unsigned)st.zFuncFail);
- fprintf(stderr," # pixels not drawn due to alpha test failure: %u\n",(unsigned)st.aFuncFail);
- fprintf(stderr," # pixels drawn (including buffer clears and LFB writes): %u\n",(unsigned)st.pixelsOut);
- }
-
- if(glbTotNumCtx==0) {
- grGlideShutdown();
- glbGlideInitialized=0;
- }
- }
- }
-
-
- #else
-
-
- /*
- * Need this to provide at least one external definition.
- */
-
- int gl_fx_dummy_function_api(void)
- {
- return 0;
- }
-
- #endif /* FX */
-