tdfx_context.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

/* -*- mode: c; c-basic-offset: 3 -*-
 *
 * Copyright 2000 VA Linux Systems Inc., Fremont, California.
 *
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * VA LINUX SYSTEMS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

/**
 * \file tdfx_context.c
 * Context management functions for 3Dfx hardware.
 *
 * \author Gareth Hughes <[e-mail]> (original rewrite 29 Sep - 1 Oct 2000)
 * \author Brian Paul <[e-mail]>
 * \author Daniel Borca <[e-mail]> (new fixes 19 Jul 2004)
 */

#include <dlfcn.h>
#include "tdfx_context.h"
#include "tdfx_dd.h"
#include "tdfx_state.h"
#include "tdfx_vb.h"
#include "tdfx_tex.h"
#include "tdfx_tris.h"
#include "tdfx_render.h"
#include "tdfx_span.h"
#include "tdfx_texman.h"
#include "extensions.h"
#include "hash.h"
#include "texobj.h"

#include "swrast/swrast.h"
#include "swrast_setup/swrast_setup.h"
#include "vbo/vbo.h"

#include "tnl/tnl.h"
#include "tnl/t_pipeline.h"

#include "drivers/common/driverfuncs.h"

#include "utils.h"

#define need_GL_ARB_multisample
/* #define need_GL_ARB_point_parameters */
#define need_GL_ARB_occlusion_query
#define need_GL_ARB_texture_compression
#define need_GL_ARB_vertex_buffer_object
/* #define need_GL_ARB_vertex_program */
#define need_GL_EXT_blend_equation_separate
#define need_GL_EXT_blend_func_separate
#define need_GL_EXT_blend_minmax
#define need_GL_EXT_fog_coord
#define need_GL_EXT_multi_draw_arrays
#define need_GL_EXT_paletted_texture
/* #define need_GL_EXT_secondary_color */
#define need_GL_IBM_multimode_draw_arrays
/* #define need_GL_MESA_program_debug */
/* #define need_GL_NV_vertex_program */
#include "extension_helper.h"


/**
 * Common extension strings exported by all cards
 */
const struct dri_extension card_extensions[] =
{
    { "GL_ARB_multisample",                GL_ARB_multisample_functions },
    { "GL_ARB_occlusion_query",            GL_ARB_occlusion_query_functions },
    { "GL_ARB_texture_mirrored_repeat",    NULL },
    { "GL_ARB_vertex_buffer_object",       GL_ARB_vertex_buffer_object_functions },

    { "GL_EXT_blend_func_separate",        GL_EXT_blend_func_separate_functions },
    { "GL_EXT_fog_coord",                  GL_EXT_fog_coord_functions },
    { "GL_EXT_multi_draw_arrays",          GL_EXT_multi_draw_arrays_functions },
    { "GL_EXT_paletted_texture",           GL_EXT_paletted_texture_functions },
    { "GL_EXT_shared_texture_palette",     NULL },
    { "GL_EXT_stencil_wrap",               NULL },
    { "GL_EXT_texture_env_add",            NULL },
    { "GL_EXT_texture_lod_bias",           NULL },
    { "GL_IBM_multimode_draw_arrays",      GL_IBM_multimode_draw_arrays_functions },

#ifdef need_GL_ARB_point_parameters
    { "GL_ARB_point_parameters",           GL_ARB_point_parameters_functions },
    { "GL_ARB_point_sprite",               NULL },
#endif
#ifdef need_GL_EXT_secondary_color
    { "GL_EXT_secondary_color",            GL_EXT_secondary_color_functions },
#endif
#ifdef need_GL_ARB_vertex_program
    { "GL_ARB_vertex_program",             GL_ARB_vertex_program_functions }
#endif
#ifdef need_GL_NV_vertex_program
    { "GL_NV_vertex_program",              GL_NV_vertex_program_functions }
    { "GL_NV_vertex_program1_1",           NULL },
#endif
#ifdef need_GL_MESA_program_debug
    { "GL_MESA_program_debug",             GL_MESA_program_debug_functions },
#endif
    { NULL,                                NULL }
};

/**
 * Extension strings exported only by Naplam (e.g., Voodoo4 & Voodoo5) cards.
 */
const struct dri_extension napalm_extensions[] =
{
    { "GL_ARB_texture_compression",        GL_ARB_texture_compression_functions },
    { "GL_ARB_texture_env_combine",        NULL },
    { "GL_EXT_blend_equation_separate",    GL_EXT_blend_equation_separate_functions },
    { "GL_EXT_blend_subtract",             GL_EXT_blend_minmax_functions },
    { "GL_EXT_texture_compression_s3tc",   NULL },
    { "GL_EXT_texture_env_combine",        NULL },

    { "GL_3DFX_texture_compression_FXT1",  NULL },
    { "GL_NV_blend_square",                NULL },
    { "GL_S3_s3tc",                        NULL },
    { NULL,                                NULL }
};

/*
 * Enable/Disable the extensions for this context.
 */
static void tdfxDDInitExtensions( GLcontext *ctx )
{
   tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);

   driInitExtensions( ctx, card_extensions, GL_FALSE );

   if ( fxMesa->haveTwoTMUs ) {
      _mesa_enable_extension( ctx, "GL_ARB_multitexture" );
   }

   if ( TDFX_IS_NAPALM( fxMesa ) ) {
      driInitExtensions( ctx, napalm_extensions, GL_FALSE );
   } else {
      _mesa_enable_extension( ctx, "GL_SGIS_generate_mipmap" );
   }
}



static const struct tnl_pipeline_stage *tdfx_pipeline[] = {
   &_tnl_vertex_transform_stage, 
   &_tnl_normal_transform_stage, 
   &_tnl_lighting_stage,
   &_tnl_fog_coordinate_stage, 
   &_tnl_texgen_stage, 
   &_tnl_texture_transform_stage, 
   &_tnl_point_attenuation_stage,
   &_tnl_render_stage,		
   0,
};

static const struct dri_debug_control debug_control[] =
{
    { "dri",   DEBUG_VERBOSE_DRI },
    { "sync",  DEBUG_ALWAYS_SYNC },
    { "api",   DEBUG_VERBOSE_API },
    { "fall",  DEBUG_VERBOSE_FALL },
    { NULL,    0 }
};

GLboolean tdfxCreateContext( const __GLcontextModes *mesaVis,
			     __DRIcontextPrivate *driContextPriv,
                             void *sharedContextPrivate )
{
   tdfxContextPtr fxMesa;
   GLcontext *ctx, *shareCtx;
   __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
   tdfxScreenPrivate *fxScreen = (tdfxScreenPrivate *) sPriv->private;
   TDFXSAREAPriv *saPriv = (TDFXSAREAPriv *) ((char *) sPriv->pSAREA +
					      sizeof(drm_sarea_t));
   struct dd_function_table functions;

   /* Allocate tdfx context */
   fxMesa = (tdfxContextPtr) CALLOC( sizeof(tdfxContextRec) );
   if (!fxMesa)
      return GL_FALSE;

   /* Init default driver functions then plug in our tdfx-specific functions
    * (the texture functions are especially important)
    */
   _mesa_init_driver_functions(&functions);
   tdfxDDInitDriverFuncs(mesaVis, &functions);
   tdfxInitTextureFuncs(&functions);
   tdfxInitRenderFuncs(&functions);

   /* Allocate the Mesa context */
   if (sharedContextPrivate)
      shareCtx = ((tdfxContextPtr) sharedContextPrivate)->glCtx;
   else 
      shareCtx = NULL;

   fxMesa->glCtx = _mesa_create_context(mesaVis, shareCtx,
                                        &functions, (void *) fxMesa);
   if (!fxMesa->glCtx) {
      FREE(fxMesa);
      return GL_FALSE;
   }
   driContextPriv->driverPrivate = fxMesa;

   /* Mirror some important DRI state
    */
   fxMesa->hHWContext = driContextPriv->hHWContext;
   fxMesa->driHwLock = &sPriv->pSAREA->lock;
   fxMesa->driFd = sPriv->fd;

   fxMesa->driScreen = sPriv;
   fxMesa->driContext = driContextPriv;
   fxMesa->fxScreen = fxScreen;
   fxMesa->sarea = saPriv;

   /*JJJ - really?*/
   fxMesa->haveHwAlpha = ( mesaVis->alphaBits &&
                           ((mesaVis->greenBits == 8) ||
                            (mesaVis->depthBits == 0)) );
   fxMesa->haveHwStencil = ( TDFX_IS_NAPALM( fxMesa ) &&
			     mesaVis->stencilBits &&
			     mesaVis->depthBits == 24 );

   fxMesa->screen_width = fxScreen->width;
   fxMesa->screen_height = fxScreen->height;

   fxMesa->new_gl_state = ~0;
   fxMesa->new_state = ~0;
   fxMesa->dirty = ~0;

   /* Parse configuration files */
   driParseConfigFiles (&fxMesa->optionCache, &fxScreen->optionCache,
                        fxMesa->driScreen->myNum, "tdfx");

   /* NOTE: This must be here before any Glide calls! */
   if (!tdfxInitGlide( fxMesa )) {
      FREE(fxMesa);
      return GL_FALSE;
   }

   fxMesa->Glide.grDRIOpen( (char*) sPriv->pFB, fxScreen->regs.map, fxScreen->deviceID,
	      fxScreen->width, fxScreen->height, fxScreen->mem, fxScreen->cpp,
	      fxScreen->stride, fxScreen->fifoOffset, fxScreen->fifoSize,
	      fxScreen->fbOffset, fxScreen->backOffset, fxScreen->depthOffset,
	      fxScreen->textureOffset, fxScreen->textureSize, &saPriv->fifoPtr,
	      &saPriv->fifoRead );

   if ( getenv( "FX_GLIDE_SWAPINTERVAL" ) ) {
      fxMesa->Glide.SwapInterval = atoi( getenv( "FX_GLIDE_SWAPINTERVAL" ) );
   } else {
      fxMesa->Glide.SwapInterval = 0;
   }
   if ( getenv( "FX_MAX_PENDING_SWAPS" ) ) {
      fxMesa->Glide.MaxPendingSwaps = atoi( getenv( "FX_MAX_PENDING_SWAPS" ) );
   } else {
      fxMesa->Glide.MaxPendingSwaps = 2;
   }

   fxMesa->Glide.Initialized = GL_FALSE;
   fxMesa->Glide.Board = 0;


   if (getenv("FX_EMULATE_SINGLE_TMU")) {
      fxMesa->haveTwoTMUs = GL_FALSE;
   }
   else {
      if ( TDFX_IS_BANSHEE( fxMesa ) ) {
         fxMesa->haveTwoTMUs = GL_FALSE;
      } else {
         fxMesa->haveTwoTMUs = GL_TRUE;
      }
   }

   fxMesa->stats.swapBuffer = 0;
   fxMesa->stats.reqTexUpload = 0;
   fxMesa->stats.texUpload = 0;
   fxMesa->stats.memTexUpload = 0;

   fxMesa->tmuSrc = TDFX_TMU_NONE;

   ctx = fxMesa->glCtx;
   if ( TDFX_IS_NAPALM( fxMesa ) ) {
      ctx->Const.MaxTextureLevels = 12;
   } else {
      ctx->Const.MaxTextureLevels = 9;
   }
   ctx->Const.MaxTextureUnits = TDFX_IS_BANSHEE( fxMesa ) ? 1 : 2;
   ctx->Const.MaxTextureImageUnits = ctx->Const.MaxTextureUnits;
   ctx->Const.MaxTextureCoordUnits = ctx->Const.MaxTextureUnits;

   /* No wide points.
    */
   ctx->Const.MinPointSize = 1.0;
   ctx->Const.MinPointSizeAA = 1.0;
   ctx->Const.MaxPointSize = 1.0;
   ctx->Const.MaxPointSizeAA = 1.0;

   /* Disable wide lines as we can't antialias them correctly in
    * hardware.
    */
   ctx->Const.MinLineWidth = 1.0;
   ctx->Const.MinLineWidthAA = 1.0;
   ctx->Const.MaxLineWidth = 1.0;
   ctx->Const.MaxLineWidthAA = 1.0;
   ctx->Const.LineWidthGranularity = 1.0;

   /* Initialize the software rasterizer and helper modules.
    */
   _swrast_CreateContext( ctx );
   _vbo_CreateContext( ctx );
   _tnl_CreateContext( ctx );
   _swsetup_CreateContext( ctx );

   /* Install the customized pipeline:
    */
   _tnl_destroy_pipeline( ctx );
   _tnl_install_pipeline( ctx, tdfx_pipeline );

   /* Configure swrast and T&L to match hardware characteristics:
    */
   _swrast_allow_pixel_fog( ctx, GL_TRUE );
   _swrast_allow_vertex_fog( ctx, GL_FALSE );
   _tnl_allow_pixel_fog( ctx, GL_TRUE );
   _tnl_allow_vertex_fog( ctx, GL_FALSE );

   tdfxDDInitExtensions( ctx );
   /* XXX these should really go right after _mesa_init_driver_functions() */
   tdfxDDInitSpanFuncs( ctx );