src/mesa/drivers/dri/ffb/ffb_depth.c

   1 /* $XFree86: xc/lib/GL/mesa/src/drv/ffb/ffb_depth.c,v 1.2 2002/02/22 21:32:58 dawes Exp $
   2  *
   3  * GLX Hardware Device Driver for Sun Creator/Creator3D
   4  * Copyright (C) 2000 David S. Miller
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * DAVID MILLER, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
  22  * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  *
  25  *    David S. Miller <davem@redhat.com>
  26  */
  27
  28 #include "mtypes.h"
  29 #include "swrast/swrast.h"
  30 #include "ffb_dd.h"
  31 #include "ffb_span.h"
  32 #include "ffb_context.h"
  33 #include "ffb_depth.h"
  34 #include "ffb_lock.h"
  35
  36 #include "swrast/swrast.h"
  37
  38 #undef DEPTH_TRACE
  39
  40 static void FFBWriteDepthSpan( GLcontext *ctx,
  41                                  struct gl_renderbuffer *rb,
  42                                  GLuint n, GLint x, GLint y,
  43                                  const void *values,
  44                                  const GLubyte mask[] )
  45 {
  46         const GLuint *depth = (const GLuint *) values;
  47 #ifdef DEPTH_TRACE
  48         fprintf(stderr, "FFBWriteDepthSpan: n(%d) x(%d) y(%d)\n",
  49                 (int) n, x, y);
  50 #endif
  51         if (ctx->Depth.Mask) {
  52                 ffbContextPtr fmesa = FFB_CONTEXT(ctx);
  53                 __DRIdrawablePrivate *dPriv = fmesa->driDrawable;
  54                 GLuint *zptr;
  55                 GLuint i;
  56
  57                 if (!fmesa->hw_locked)
  58                         LOCK_HARDWARE(fmesa);
  59                 FFBFifo(fmesa, 2);
  60                 fmesa->regs->fbc = (FFB_FBC_WB_C | FFB_FBC_ZE_ON |
  61                                     FFB_FBC_YE_OFF | FFB_FBC_RGBE_OFF);
  62                 fmesa->regs->ppc = FFB_PPC_ZS_VAR;
  63                 FFBWait(fmesa, fmesa->regs);
  64
  65                 y = (dPriv->h - y);
  66                 zptr = (GLuint *)
  67                         ((char *)fmesa->sfb32 +
  68                          ((dPriv->x + x) << 2) +
  69                          ((dPriv->y + y) << 13));
  70
  71                 for (i = 0; i < n; i++) {
  72                         if (mask[i]) {
  73                                 *zptr = Z_FROM_MESA(depth[i]);
  74                         }
  75                         zptr++;
  76                 }
  77
  78                 FFBFifo(fmesa, 2);
  79                 fmesa->regs->fbc = fmesa->fbc;
  80                 fmesa->regs->ppc = fmesa->ppc;
  81                 fmesa->ffbScreen->rp_active = 1;
  82                 if (!fmesa->hw_locked)
  83                         UNLOCK_HARDWARE(fmesa);
  84         }
  85 }
  86
  87 static void FFBWriteMonoDepthSpan( GLcontext *ctx,
  88                                      struct gl_renderbuffer *rb,
  89                                      GLuint n, GLint x, GLint y,
  90                                      const void *value, const GLubyte mask[] )
  91 {
  92         const GLuint depthVal = *((GLuint *) value);
  93         GLuint depths[MAX_WIDTH];
  94         GLuint i;
  95         for (i = 0; i < n; i++)
  96                 depths[i] = depthVal;
  97         FFBWriteDepthSpan(ctx, rb, n, x, y, depths, mask);
  98 }
  99
 100 static void FFBWriteDepthPixels( GLcontext *ctx,
 101                                    struct gl_renderbuffer *rb,
 102                                    GLuint n,
 103                                    const GLint x[],
 104                                    const GLint y[],
 105                                    const void *values,
 106                                    const GLubyte mask[] )
 107 {
 108         const GLuint *depth = (const GLuint *) values;
 109 #ifdef DEPTH_TRACE
 110         fprintf(stderr, "FFBWriteDepthPixels: n(%d)\n", (int) n);
 111 #endif
 112         if (ctx->Depth.Mask) {
 113                 ffbContextPtr fmesa = FFB_CONTEXT(ctx);
 114                 __DRIdrawablePrivate *dPriv = fmesa->driDrawable;
 115                 char *zbase;
 116                 GLuint i;
 117
 118                 if (!fmesa->hw_locked)
 119                         LOCK_HARDWARE(fmesa);
 120                 FFBFifo(fmesa, 2);
 121                 fmesa->regs->fbc = (FFB_FBC_WB_C | FFB_FBC_ZE_ON |
 122                                     FFB_FBC_YE_OFF | FFB_FBC_RGBE_OFF);
 123                 fmesa->regs->ppc = FFB_PPC_ZS_VAR;
 124                 fmesa->ffbScreen->rp_active = 1;
 125                 FFBWait(fmesa, fmesa->regs);
 126
 127                 zbase = ((char *)fmesa->sfb32 +
 128                          (dPriv->x << 2) + (dPriv->y << 13));
 129
 130                 for (i = 0; i < n; i++) {
 131                         GLint y1 = (dPriv->h - y[i]);
 132                         GLint x1 = x[i];
 133                         GLuint *zptr;
 134
 135                         zptr = (GLuint *)
 136                                 (zbase + (x1 << 2) + (y1 << 13));
 137                         if (mask[i])
 138                                 *zptr = Z_FROM_MESA(depth[i]);
 139                 }
 140
 141                 FFBFifo(fmesa, 2);
 142                 fmesa->regs->fbc = fmesa->fbc;
 143                 fmesa->regs->ppc = fmesa->ppc;
 144                 fmesa->ffbScreen->rp_active = 1;
 145                 if (!fmesa->hw_locked)
 146                         UNLOCK_HARDWARE(fmesa);
 147         }
 148 }
 149
 150 static void FFBReadDepthSpan( GLcontext *ctx,
 151                                 struct gl_renderbuffer *rb,
 152                                 GLuint n, GLint x, GLint y,
 153                                 void *values )
 154 {
 155         GLuint *depth = (GLuint *) values;
 156         ffbContextPtr fmesa = FFB_CONTEXT(ctx);
 157         __DRIdrawablePrivate *dPriv = fmesa->driDrawable;
 158         GLuint *zptr;
 159         GLuint i;
 160
 161 #ifdef DEPTH_TRACE
 162         fprintf(stderr, "FFBReadDepthSpan: n(%d) x(%d) y(%d)\n",
 163                 (int) n, x, y);
 164 #endif
 165         if (!fmesa->hw_locked)
 166                 LOCK_HARDWARE(fmesa);
 167         FFBFifo(fmesa, 1);
 168         fmesa->regs->fbc = FFB_FBC_RB_C;
 169         fmesa->ffbScreen->rp_active = 1;
 170         FFBWait(fmesa, fmesa->regs);
 171
 172         y = (dPriv->h - y);
 173         zptr = (GLuint *)
 174                 ((char *)fmesa->sfb32 +
 175                  ((dPriv->x + x) << 2) +
 176                  ((dPriv->y + y) << 13));
 177
 178         for (i = 0; i < n; i++) {
 179                 depth[i] = Z_TO_MESA(*zptr);
 180                 zptr++;
 181         }
 182
 183         FFBFifo(fmesa, 1);
 184         fmesa->regs->fbc = fmesa->fbc;
 185         fmesa->ffbScreen->rp_active = 1;
 186         if (!fmesa->hw_locked)
 187                 UNLOCK_HARDWARE(fmesa);
 188 }
 189
 190 static void FFBReadDepthPixels( GLcontext *ctx,
 191                                   struct gl_renderbuffer *rb,
 192                                   GLuint n,
 193                                   const GLint x[], const GLint y[],
 194                                   void *values )
 195 {
 196         GLuint *depth = (GLuint *) values;
 197         ffbContextPtr fmesa = FFB_CONTEXT(ctx);
 198         __DRIdrawablePrivate *dPriv = fmesa->driDrawable;
 199         char *zbase;
 200         GLuint i;
 201
 202 #ifdef DEPTH_TRACE
 203         fprintf(stderr, "FFBReadDepthPixels: n(%d)\n", (int) n);
 204 #endif
 205         if (!fmesa->hw_locked)
 206                 LOCK_HARDWARE(fmesa);
 207         FFBFifo(fmesa, 1);
 208         fmesa->regs->fbc = FFB_FBC_RB_C;
 209         fmesa->ffbScreen->rp_active = 1;
 210         FFBWait(fmesa, fmesa->regs);
 211
 212         zbase = ((char *)fmesa->sfb32 +
 213                  (dPriv->x << 2) + (dPriv->y << 13));
 214
 215         for (i = 0; i < n; i++) {
 216                 GLint y1 = (dPriv->h - y[i]);
 217                 GLint x1 = x[i];
 218                 GLuint *zptr;
 219
 220                 zptr = (GLuint *)
 221                         (zbase + (x1 << 2) + (y1 << 13));
 222                 depth[i] = Z_TO_MESA(*zptr);
 223         }
 224
 225         FFBFifo(fmesa, 1);
 226         fmesa->regs->fbc = fmesa->fbc;
 227         fmesa->ffbScreen->rp_active = 1;
 228         if (!fmesa->hw_locked)
 229                 UNLOCK_HARDWARE(fmesa);
 230 }
 231
 232 /**
 233  * Plug in the Get/Put routines for the given driRenderbuffer.
 234  */
 235 void
 236 ffbSetDepthFunctions(driRenderbuffer *drb, const GLvisual *vis)
 237 {
 238         assert(drb->Base.InternalFormat == GL_DEPTH_COMPONENT16);
 239         drb->Base.GetRow        = FFBReadDepthSpan;
 240         drb->Base.GetValues     = FFBReadDepthPixels;
 241         drb->Base.PutRow        = FFBWriteDepthSpan;
 242         drb->Base.PutMonoRow    = FFBWriteMonoDepthSpan;
 243         drb->Base.PutValues     = FFBWriteDepthPixels;
 244         drb->Base.PutMonoValues = NULL;
 245 }