src/mesa/drivers/x11/xm_glide.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5
   4  *
   5  * Copyright (C) 1999-2006  Brian Paul   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 shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 #include "glxheader.h"
  27 #include "xmesaP.h"
  28
  29 #ifdef FX
  30 #include "../glide/fxdrv.h"
  31
  32 void
  33 FXcreateContext(XMesaVisual v, XMesaWindow w, XMesaContext c, XMesaBuffer b)
  34 {
  35    char *fxEnvVar = _mesa_getenv("MESA_GLX_FX");
  36    if (fxEnvVar) {
  37      if (fxEnvVar[0]!='d') {
  38        int attribs[100];
  39        int numAttribs = 0;
  40        int hw;
  41        if (v->mesa_visual.depthBits > 0) {
  42          attribs[numAttribs++] = FXMESA_DEPTH_SIZE;
  43          attribs[numAttribs++] = v->mesa_visual.depthBits;
  44        }
  45        if (v->mesa_visual.doubleBufferMode) {
  46          attribs[numAttribs++] = FXMESA_DOUBLEBUFFER;
  47        }
  48        if (v->mesa_visual.accumRedBits > 0) {
  49          attribs[numAttribs++] = FXMESA_ACCUM_SIZE;
  50          attribs[numAttribs++] = v->mesa_visual.accumRedBits;
  51        }
  52        if (v->mesa_visual.stencilBits > 0) {
  53          attribs[numAttribs++] = FXMESA_STENCIL_SIZE;
  54          attribs[numAttribs++] = v->mesa_visual.stencilBits;
  55        }
  56        if (v->mesa_visual.alphaBits > 0) {
  57          attribs[numAttribs++] = FXMESA_ALPHA_SIZE;
  58          attribs[numAttribs++] = v->mesa_visual.alphaBits;
  59        }
  60        if (1) {
  61          attribs[numAttribs++] = FXMESA_SHARE_CONTEXT;
  62          attribs[numAttribs++] = (int) &(c->mesa);
  63        }
  64        attribs[numAttribs++] = FXMESA_NONE;
  65
  66        /* [dBorca] we should take an envvar for `fxMesaSelectCurrentBoard'!!! */
  67        hw = fxMesaSelectCurrentBoard(0);
  68
  69        /* if these fail, there's a new bug somewhere */
  70        ASSERT(b->mesa_buffer.Width > 0);
  71        ASSERT(b->mesa_buffer.Height > 0);
  72
  73        if ((hw == GR_SSTTYPE_VOODOO) || (hw == GR_SSTTYPE_Voodoo2)) {
  74          b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width,
  75                                             b->mesa_buffer.Height, attribs);
  76          if ((v->undithered_pf!=PF_Index) && (b->backxrb->ximage)) {
  77            b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE;
  78            if (b->FXctx && (fxEnvVar[0]=='w' || fxEnvVar[0]=='W')) {
  79              b->FXwindowHack = GL_TRUE;
  80              FX_grSstControl(GR_CONTROL_DEACTIVATE);
  81            }
  82            else {
  83              b->FXwindowHack = GL_FALSE;
  84            }
  85          }
  86        }
  87        else {
  88          if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W')
  89            b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE,
  90                                           GR_REFRESH_75Hz, attribs);
  91          else
  92            b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width,
  93                                               b->mesa_buffer.Height, attribs);
  94          b->FXisHackUsable = GL_FALSE;
  95          b->FXwindowHack = GL_FALSE;
  96        }
  97        /*
  98        fprintf(stderr,
  99                "voodoo %d, wid %d height %d hack: usable %d active %d\n",
 100                hw, b->mesa_buffer.Width, b->mesa_buffer.Height,
 101                b->FXisHackUsable, b->FXwindowHack);
 102        */
 103      }
 104    }
 105    else {
 106       _mesa_warning(NULL, "WARNING: This Mesa Library includes the Glide driver but\n");
 107       _mesa_warning(NULL, "         you have not defined the MESA_GLX_FX env. var.\n");
 108       _mesa_warning(NULL, "         (check the README.3DFX file for more information).\n\n");
 109       _mesa_warning(NULL, "         you can disable this message with a 'export MESA_GLX_FX=disable'.\n");
 110    }
 111 }
 112
 113
 114 void FXdestroyContext( XMesaBuffer b )
 115 {
 116    if (b && b->FXctx)
 117       fxMesaDestroyContext(b->FXctx);
 118 }
 119
 120
 121 GLboolean FXmakeCurrent( XMesaBuffer b )
 122 {
 123    if (b->FXctx) {
 124       fxMesaMakeCurrent(b->FXctx);
 125
 126       return GL_TRUE;
 127    }
 128    return GL_FALSE;
 129 }
 130
 131
 132 /*
 133  * Read image from VooDoo frame buffer into X/Mesa's back XImage.
 134  */
 135 static void FXgetImage( XMesaBuffer b )
 136 {
 137    GET_CURRENT_CONTEXT(ctx);
 138    static unsigned short pixbuf[MAX_WIDTH];
 139    GLuint x, y;
 140    GLuint width, height;
 141
 142 #ifdef XFree86Server
 143    x = b->frontxrb->pixmap->x;
 144    y = b->frontxrb->pixmap->y;
 145    width = b->frontxrb->pixmap->width;
 146    height = b->frontxrb->pixmap->height;
 147    depth = b->frontxrb->pixmap->depth;
 148 #else
 149    xmesa_get_window_size(b->display, b, &width, &height);
 150    x = y = 0;
 151 #endif
 152    if (b->mesa_buffer.Width != width || b->mesa_buffer.Height != height) {
 153       b->mesa_buffer.Width = MIN2((int)width, b->FXctx->width);
 154       b->mesa_buffer.Height = MIN2((int)height, b->FXctx->height);
 155       if (b->mesa_buffer.Width & 1)
 156          b->mesa_buffer.Width--;  /* prevent odd width */
 157    }
 158
 159    /* [dBorca] we're always in the right GR_COLORFORMAT... aren't we? */
 160    /* grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); */
 161    if (b->xm_visual->undithered_pf==PF_5R6G5B) {
 162       /* Special case: 16bpp RGB */
 163       grLfbReadRegion( GR_BUFFER_FRONTBUFFER,       /* src buffer */
 164                        0, b->FXctx->height - b->mesa_buffer.Height,  /*pos*/
 165                        b->mesa_buffer.Width, b->mesa_buffer.Height,  /* size */
 166                        b->mesa_buffer.Width * sizeof(GLushort), /* stride */
 167                        b->backxrb->ximage->data);         /* dest buffer */
 168    }
 169    else if (b->xm_visual->dithered_pf==PF_Dither
 170             && GET_VISUAL_DEPTH(b->xm_visual)==8) {
 171       /* Special case: 8bpp RGB */
 172       for (y=0;y<b->mesa_buffer.Height;y++) {
 173          GLubyte *ptr = (GLubyte*) b->backxrb->ximage->data
 174                         + b->backxrb->ximage->bytes_per_line * y;
 175          XDITHER_SETUP(y);
 176
 177          /* read row from 3Dfx frame buffer */
 178          grLfbReadRegion( GR_BUFFER_FRONTBUFFER,
 179                           0, b->FXctx->height-(b->mesa_buffer.Height-y),
 180                           b->mesa_buffer.Width, 1,
 181                           0,
 182                           pixbuf );
 183
 184          /* write to XImage back buffer */
 185          for (x=0;x<b->mesa_buffer.Width;x++) {
 186             GLubyte r = (pixbuf[x] & 0xf800) >> 8;
 187             GLubyte g = (pixbuf[x] & 0x07e0) >> 3;
 188             GLubyte b = (pixbuf[x] & 0x001f) << 3;
 189             *ptr++ = XDITHER( x, r, g, b);
 190          }
 191       }
 192    }
 193    else {
 194       /* General case: slow! */
 195       for (y=0;y<b->mesa_buffer.Height;y++) {
 196          /* read row from 3Dfx frame buffer */
 197          grLfbReadRegion( GR_BUFFER_FRONTBUFFER,
 198                           0, b->FXctx->height-(b->mesa_buffer.Height-y),
 199                           b->mesa_buffer.Width, 1,
 200                           0,
 201                           pixbuf );
 202
 203          /* write to XImage back buffer */
 204          for (x=0;x<b->mesa_buffer.Width;x++) {
 205             XMesaPutPixel(b->backxrb->ximage,x,y,
 206                           xmesa_color_to_pixel(ctx,
 207                                                (pixbuf[x] & 0xf800) >> 8,
 208                                                (pixbuf[x] & 0x07e0) >> 3,
 209                                                (pixbuf[x] & 0x001f) << 3,
 210                                                0xff,
 211                                                b->xm_visual->undithered_pf));
 212          }
 213       }
 214    }
 215    /* grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); */
 216 }
 217
 218
 219 GLboolean FXswapBuffers( XMesaBuffer b )
 220 {
 221    if (b->FXctx) {
 222       fxMesaSwapBuffers();
 223
 224       if (!b->FXwindowHack)
 225          return GL_TRUE;
 226
 227       FXgetImage(b);
 228    }
 229    return GL_FALSE;
 230 }
 231
 232
 233 /*
 234  * Switch 3Dfx support hack between window and full-screen mode.
 235  */
 236 GLboolean XMesaSetFXmode( GLint mode )
 237 {
 238    const char *fx = _mesa_getenv("MESA_GLX_FX");
 239    if (fx && fx[0] != 'd') {
 240       GET_CURRENT_CONTEXT(ctx);
 241       GrHwConfiguration hw;
 242       if (!FX_grSstQueryHardware(&hw)) {
 243          /*fprintf(stderr, "!grSstQueryHardware\n");*/
 244          return GL_FALSE;
 245       }
 246       if (hw.num_sst < 1) {
 247          /*fprintf(stderr, "hw.num_sst < 1\n");*/
 248          return GL_FALSE;
 249       }
 250       if (ctx) {
 251          /* [dBorca] Hack alert:
 252           * oh, this is sooo wrong: ctx above is
 253           * really an fxMesaContext, not an XMesaContext
 254           */
 255          XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
 256          if (mode == XMESA_FX_WINDOW) {
 257             if (xmbuf->FXisHackUsable) {
 258                FX_grSstControl(GR_CONTROL_DEACTIVATE);
 259                xmbuf->FXwindowHack = GL_TRUE;
 260                return GL_TRUE;
 261             }
 262          }
 263          else if (mode == XMESA_FX_FULLSCREEN) {
 264             FX_grSstControl(GR_CONTROL_ACTIVATE);
 265             xmbuf->FXwindowHack = GL_FALSE;
 266             return GL_TRUE;
 267          }
 268          else {
 269             /* Error: Bad mode value */
 270          }
 271       }
 272    }
 273    /*fprintf(stderr, "fallthrough\n");*/
 274    return GL_FALSE;
 275 }
 276 #endif