src/mesa/drivers/dri/tdfx/tdfx_dd.c

   1 /* -*- mode: c; c-basic-offset: 3 -*-
   2  *
   3  * Copyright 2000 VA Linux Systems Inc., Fremont, California.
   4  *
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the next
  15  * paragraph) shall be included in all copies or substantial portions of the
  16  * Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * VA LINUX SYSTEMS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  22  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  23  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  24  * SOFTWARE.
  25  */
  26
  27 /**
  28  * \file tdfx_dd.c
  29  * Device driver interface functions for 3Dfx based cards.
  30  *
  31  * \author Gareth Hughes <gareth@valinux.com> (Original rewrite 29 Sep - 1 Oct 2000)
  32  * \author Brian Paul <brianp@valinux.com>
  33  */
  34
  35 #include "tdfx_context.h"
  36 #include "tdfx_dd.h"
  37 #include "tdfx_lock.h"
  38 #include "tdfx_pixels.h"
  39
  40 #include "utils.h"
  41 #include "main/context.h"
  42
  43
  44 #define DRIVER_DATE     "20061113"
  45
  46
  47 /* These are used in calls to FX_grColorMaskv() */
  48 const GLboolean false4[4] = { GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE };
  49 const GLboolean true4[4] = { GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE };
  50
  51
  52
  53 /* KW: Put the word Mesa in the render string because quakeworld
  54  * checks for this rather than doing a glGet(GL_MAX_TEXTURE_SIZE).
  55  * Why?
  56  */
  57 static const GLubyte *tdfxDDGetString( GLcontext *ctx, GLenum name )
  58 {
  59    tdfxContextPtr fxMesa = (tdfxContextPtr) ctx->DriverCtx;
  60
  61    switch (name) {
  62    case GL_RENDERER:
  63    {
  64       /* The renderer string must be per-context state to handle
  65        * multihead correctly.
  66        */
  67       char *const buffer = fxMesa->rendererString;
  68       char hardware[64];
  69
  70       LOCK_HARDWARE(fxMesa);
  71       strncpy(hardware, fxMesa->Glide.grGetString(GR_HARDWARE),
  72               sizeof(hardware));
  73       hardware[sizeof(hardware) - 1] = '\0';
  74       UNLOCK_HARDWARE(fxMesa);
  75
  76       if ((strncmp(hardware, "Voodoo3", 7) == 0)
  77           || (strncmp(hardware, "Voodoo4", 7) == 0)
  78           || (strncmp(hardware, "Voodoo5", 7) == 0)) {
  79          hardware[7] = '\0';
  80       }
  81       else if (strncmp(hardware, "Voodoo Banshee", 14) == 0) {
  82          strcpy(&hardware[6], "Banshee");
  83       }
  84       else {
  85          /* unexpected result: replace spaces with hyphens */
  86          int i;
  87          for (i = 0; i < sizeof(hardware) && hardware[i]; i++) {
  88             if (hardware[i] == ' ' || hardware[i] == '\t') {
  89                hardware[i] = '-';
  90             }
  91          }
  92       }
  93
  94       (void) driGetRendererString(buffer, hardware, DRIVER_DATE, 0);
  95       return (const GLubyte *) buffer;
  96    }
  97    case GL_VENDOR:
  98       return (const GLubyte *)"VA Linux Systems, Inc.";
  99    default:
 100       return NULL;
 101    }
 102 }
 103
 104
 105 static void
 106 tdfxBeginQuery(GLcontext *ctx, struct gl_query_object *q)
 107 {
 108    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 109
 110    (void) q;
 111
 112    if (q->Target == GL_SAMPLES_PASSED_ARB) {
 113       LOCK_HARDWARE(fxMesa);
 114       fxMesa->Glide.grFinish();
 115       fxMesa->Glide.grReset(GR_STATS_PIXELS);
 116       UNLOCK_HARDWARE(fxMesa);
 117    }
 118 }
 119
 120
 121 static void
 122 tdfxEndQuery(GLcontext *ctx, struct gl_query_object *q)
 123 {
 124    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 125    FxI32 total_pixels;
 126    FxI32 z_fail_pixels;
 127
 128
 129    if (q->Target == GL_SAMPLES_PASSED_ARB) {
 130       LOCK_HARDWARE(fxMesa);
 131       fxMesa->Glide.grFinish();
 132
 133       fxMesa->Glide.grGet(GR_STATS_PIXELS_DEPTHFUNC_FAIL, sizeof(FxI32),
 134                           &z_fail_pixels);
 135       fxMesa->Glide.grGet(GR_STATS_PIXELS_IN, sizeof(FxI32), &total_pixels);
 136
 137       q->Result = total_pixels - z_fail_pixels;
 138
 139       /* Apparently, people have seen z_fail_pixels > total_pixels under
 140        * some conditions on some 3Dfx hardware.  The occlusion query spec
 141        * requires that we clamp to 0.
 142        */
 143       if (q->Result < 0) {
 144          q->Result = 0;
 145       }
 146
 147       q->Ready = GL_TRUE;
 148
 149       UNLOCK_HARDWARE(fxMesa);
 150    }
 151 }
 152
 153
 154 #define VISUAL_EQUALS_RGBA(vis, r, g, b, a)        \
 155    ((vis->redBits == r) &&                         \
 156     (vis->greenBits == g) &&                       \
 157     (vis->blueBits == b) &&                        \
 158     (vis->alphaBits == a))
 159
 160 void tdfxDDInitDriverFuncs( const __GLcontextModes *visual,
 161                             struct dd_function_table *functions )
 162 {
 163    if ( MESA_VERBOSE & VERBOSE_DRIVER ) {
 164       fprintf( stderr, "tdfx: %s()\n", __FUNCTION__ );
 165    }
 166
 167    functions->GetString         = tdfxDDGetString;
 168    functions->BeginQuery        = tdfxBeginQuery;
 169    functions->EndQuery          = tdfxEndQuery;
 170
 171    /* Accelerated paths
 172     */
 173    if ( VISUAL_EQUALS_RGBA(visual, 8, 8, 8, 8) )
 174    {
 175       functions->DrawPixels     = tdfx_drawpixels_R8G8B8A8;
 176       functions->ReadPixels     = tdfx_readpixels_R8G8B8A8;
 177    }
 178    else if ( VISUAL_EQUALS_RGBA(visual, 5, 6, 5, 0) )
 179    {
 180       functions->ReadPixels     = tdfx_readpixels_R5G6B5;
 181    }
 182 }
 183
 184
 185 /*
 186  * These are here for lack of a better place.
 187  */
 188
 189 void
 190 FX_grColorMaskv(GLcontext *ctx, const GLboolean rgba[4])
 191 {
 192    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 193    LOCK_HARDWARE(fxMesa);
 194    if (ctx->Visual.redBits == 8) {
 195       /* 32bpp mode */
 196       ASSERT( fxMesa->Glide.grColorMaskExt );
 197       fxMesa->Glide.grColorMaskExt(rgba[RCOMP], rgba[GCOMP],
 198                                    rgba[BCOMP], rgba[ACOMP]);
 199    }
 200    else {
 201       /* 16 bpp mode */
 202       /* we never have an alpha buffer */
 203       fxMesa->Glide.grColorMask(rgba[RCOMP] || rgba[GCOMP] || rgba[BCOMP],
 204                                 GL_FALSE);
 205    }
 206    UNLOCK_HARDWARE(fxMesa);
 207 }
 208
 209 void
 210 FX_grColorMaskv_NoLock(GLcontext *ctx, const GLboolean rgba[4])
 211 {
 212    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 213    if (ctx->Visual.redBits == 8) {
 214       /* 32bpp mode */
 215       ASSERT( fxMesa->Glide.grColorMaskExt );
 216       fxMesa->Glide.grColorMaskExt(rgba[RCOMP], rgba[GCOMP],
 217                                    rgba[BCOMP], rgba[ACOMP]);
 218    }
 219    else {
 220       /* 16 bpp mode */
 221       /* we never have an alpha buffer */
 222       fxMesa->Glide.grColorMask(rgba[RCOMP] || rgba[GCOMP] || rgba[BCOMP],
 223                                 GL_FALSE);
 224    }
 225 }