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        hw = GR_SSTTYPE_Voodoo2;
  69
  70        /* if these fail, there's a new bug somewhere */
  71        ASSERT(b->mesa_buffer.Width > 0);
  72        ASSERT(b->mesa_buffer.Height > 0);
  73
  74        if ((hw == GR_SSTTYPE_VOODOO) || (hw == GR_SSTTYPE_Voodoo2)) {
  75          b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width,
  76                                             b->mesa_buffer.Height, attribs);
  77          if ((v->undithered_pf!=PF_Index) && (b->backxrb->ximage)) {
  78            b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE;
  79            if (b->FXctx && (fxEnvVar[0]=='w' || fxEnvVar[0]=='W')) {
  80              b->FXwindowHack = GL_TRUE;
  81              FX_grSstControl(GR_CONTROL_DEACTIVATE);
  82            }
  83            else {
  84              b->FXwindowHack = GL_FALSE;
  85            }
  86          }
  87        }
  88        else {
  89          if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W')
  90            b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE,
  91                                           GR_REFRESH_75Hz, attribs);
  92          else
  93            b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width,
  94                                               b->mesa_buffer.Height, attribs);
  95          b->FXisHackUsable = GL_FALSE;
  96          b->FXwindowHack = GL_FALSE;
  97        }
  98        /*
  99        fprintf(stderr,
 100                "voodoo %d, wid %d height %d hack: usable %d active %d\n",
 101                hw, b->mesa_buffer.Width, b->mesa_buffer.Height,
 102                b->FXisHackUsable, b->FXwindowHack);
 103        */
 104      }
 105    }
 106    else {
 107       _mesa_warning(NULL, "WARNING: This Mesa Library includes the Glide driver but\n");
 108       _mesa_warning(NULL, "         you have not defined the MESA_GLX_FX env. var.\n");
 109       _mesa_warning(NULL, "         (check the README.3DFX file for more information).\n\n");
 110       _mesa_warning(NULL, "         you can disable this message with a 'export MESA_GLX_FX=disable'.\n");
 111    }
 112 }
 113
 114
 115 void FXdestroyContext( XMesaBuffer b )
 116 {
 117    if (b && b->FXctx)
 118       fxMesaDestroyContext(b->FXctx);
 119 }
 120
 121
 122 GLboolean FXmakeCurrent( XMesaBuffer b )
 123 {
 124    if (b->FXctx) {
 125       fxMesaMakeCurrent(b->FXctx);
 126
 127       return GL_TRUE;
 128    }
 129    return GL_FALSE;
 130 }
 131
 132
 133 /*
 134  * Read image from VooDoo frame buffer into X/Mesa's back XImage.
 135  */
 136 static void FXgetImage( XMesaBuffer b )
 137 {
 138    GET_CURRENT_CONTEXT(ctx);
 139    static unsigned short pixbuf[MAX_WIDTH];
 140    GLuint x, y;
 141    GLuint width, height;
 142
 143    xmesa_get_window_size(b->display, b, &width, &height);
 144    x = y = 0;
 145    if (b->mesa_buffer.Width != width || b->mesa_buffer.Height != height) {
 146       b->mesa_buffer.Width = MIN2((int)width, b->FXctx->width);
 147       b->mesa_buffer.Height = MIN2((int)height, b->FXctx->height);
 148       if (b->mesa_buffer.Width & 1)
 149          b->mesa_buffer.Width--;  /* prevent odd width */
 150    }
 151
 152    /* [dBorca] we're always in the right GR_COLORFORMAT... aren't we? */
 153    /* grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); */
 154    if (b->xm_visual->undithered_pf==PF_5R6G5B) {
 155       /* Special case: 16bpp RGB */
 156       grLfbReadRegion( GR_BUFFER_FRONTBUFFER,       /* src buffer */
 157                        0, b->FXctx->height - b->mesa_buffer.Height,  /*pos*/
 158                        b->mesa_buffer.Width, b->mesa_buffer.Height,  /* size */
 159                        b->mesa_buffer.Width * sizeof(GLushort), /* stride */
 160                        b->backxrb->ximage->data);         /* dest buffer */
 161    }
 162    else if (b->xm_visual->dithered_pf==PF_Dither
 163             && GET_VISUAL_DEPTH(b->xm_visual)==8) {
 164       /* Special case: 8bpp RGB */
 165       for (y=0;y<b->mesa_buffer.Height;y++) {
 166          GLubyte *ptr = (GLubyte*) b->backxrb->ximage->data
 167                         + b->backxrb->ximage->bytes_per_line * y;
 168          XDITHER_SETUP(y);
 169
 170          /* read row from 3Dfx frame buffer */
 171          grLfbReadRegion( GR_BUFFER_FRONTBUFFER,
 172                           0, b->FXctx->height-(b->mesa_buffer.Height-y),
 173                           b->mesa_buffer.Width, 1,
 174                           0,
 175                           pixbuf );
 176
 177          /* write to XImage back buffer */
 178          for (x=0;x<b->mesa_buffer.Width;x++) {
 179             GLubyte r = (pixbuf[x] & 0xf800) >> 8;
 180             GLubyte g = (pixbuf[x] & 0x07e0) >> 3;
 181             GLubyte b = (pixbuf[x] & 0x001f) << 3;
 182             *ptr++ = XDITHER( x, r, g, b);
 183          }
 184       }
 185    }
 186    else {
 187       /* General case: slow! */
 188       for (y=0;y<b->mesa_buffer.Height;y++) {
 189          /* read row from 3Dfx frame buffer */
 190          grLfbReadRegion( GR_BUFFER_FRONTBUFFER,
 191                           0, b->FXctx->height-(b->mesa_buffer.Height-y),
 192                           b->mesa_buffer.Width, 1,
 193                           0,
 194                           pixbuf );
 195
 196          /* write to XImage back buffer */
 197          for (x=0;x<b->mesa_buffer.Width;x++) {
 198             XMesaPutPixel(b->backxrb->ximage,x,y,
 199                           xmesa_color_to_pixel(ctx,
 200                                                (pixbuf[x] & 0xf800) >> 8,
 201                                                (pixbuf[x] & 0x07e0) >> 3,
 202                                                (pixbuf[x] & 0x001f) << 3,
 203                                                0xff,
 204                                                b->xm_visual->undithered_pf));
 205          }
 206       }
 207    }
 208    /* grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); */
 209 }
 210
 211
 212 GLboolean FXswapBuffers( XMesaBuffer b )
 213 {
 214    if (b->FXctx) {
 215       fxMesaSwapBuffers();
 216
 217       if (!b->FXwindowHack)
 218          return GL_TRUE;
 219
 220       FXgetImage(b);
 221    }
 222    return GL_FALSE;
 223 }
 224
 225
 226 /*
 227  * Switch 3Dfx support hack between window and full-screen mode.
 228  */
 229 GLboolean XMesaSetFXmode( GLint mode )
 230 {
 231    const char *fx = _mesa_getenv("MESA_GLX_FX");
 232    if (fx && fx[0] != 'd') {
 233       GET_CURRENT_CONTEXT(ctx);
 234       GrHwConfiguration hw;
 235       if (!FX_grSstQueryHardware(&hw)) {
 236          /*fprintf(stderr, "!grSstQueryHardware\n");*/
 237          return GL_FALSE;
 238       }
 239       if (hw.num_sst < 1) {
 240          /*fprintf(stderr, "hw.num_sst < 1\n");*/
 241          return GL_FALSE;
 242       }
 243       if (ctx) {
 244          /* [dBorca] Hack alert:
 245           * oh, this is sooo wrong: ctx above is
 246           * really an fxMesaContext, not an XMesaContext
 247           */
 248          XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
 249          if (mode == XMESA_FX_WINDOW) {
 250             if (xmbuf->FXisHackUsable) {
 251                FX_grSstControl(GR_CONTROL_DEACTIVATE);
 252                xmbuf->FXwindowHack = GL_TRUE;
 253                return GL_TRUE;
 254             }
 255          }
 256          else if (mode == XMESA_FX_FULLSCREEN) {
 257             FX_grSstControl(GR_CONTROL_ACTIVATE);
 258             xmbuf->FXwindowHack = GL_FALSE;
 259             return GL_TRUE;
 260          }
 261          else {
 262             /* Error: Bad mode value */
 263          }
 264       }
 265    }
 266    /*fprintf(stderr, "fallthrough\n");*/
 267    return GL_FALSE;
 268 }
 269 #endif