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 "main/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
  37 #undef DEPTH_TRACE
  38
  39 static void FFBWriteDepthSpan( GLcontext *ctx,
  40                                  struct gl_renderbuffer *rb,
  41                                  GLuint n, GLint x, GLint y,
  42                                  const void *values,
  43                                  const GLubyte mask[] )
  44 {
  45         const GLuint *depth = (const GLuint *) values;
  46 #ifdef DEPTH_TRACE
  47         fprintf(stderr, "FFBWriteDepthSpan: n(%d) x(%d) y(%d)\n",
  48                 (int) n, x, y);
  49 #endif
  50         if (ctx->Depth.Mask) {
  51                 ffbContextPtr fmesa = FFB_CONTEXT(ctx);
  52                 __DRIdrawablePrivate *dPriv = fmesa->driDrawable;
  53                 GLuint *zptr;
  54                 GLuint i;
  55
  56                 if (!fmesa->hw_locked)
  57                         LOCK_HARDWARE(fmesa);
  58                 FFBFifo(fmesa, 2);
  59                 fmesa->regs->fbc = (FFB_FBC_WB_C | FFB_FBC_ZE_ON |
  60                                     FFB_FBC_YE_OFF | FFB_FBC_RGBE_OFF);
  61                 fmesa->regs->ppc = FFB_PPC_ZS_VAR;
  62                 FFBWait(fmesa, fmesa->regs);
  63
  64                 y = (dPriv->h - y);
  65                 zptr = (GLuint *)
  66                         ((char *)fmesa->sfb32 +
  67                          ((dPriv->x + x) << 2) +
  68                          ((dPriv->y + y) << 13));
  69
  70                 for (i = 0; i < n; i++) {
  71                         if (mask[i]) {
  72                                 *zptr = Z_FROM_MESA(depth[i]);
  73                         }
  74                         zptr++;
  75                 }
  76
  77                 FFBFifo(fmesa, 2);
  78                 fmesa->regs->fbc = fmesa->fbc;
  79                 fmesa->regs->ppc = fmesa->ppc;
  80                 fmesa->ffbScreen->rp_active = 1;
  81                 if (!fmesa->hw_locked)
  82                         UNLOCK_HARDWARE(fmesa);
  83         }
  84 }
  85
  86 static void FFBWriteMonoDepthSpan( GLcontext *ctx,
  87                                      struct gl_renderbuffer *rb,
  88                                      GLuint n, GLint x, GLint y,
  89                                      const void *value, const GLubyte mask[] )
  90 {
  91         const GLuint depthVal = *((GLuint *) value);
  92         GLuint depths[MAX_WIDTH];
  93         GLuint i;
  94         for (i = 0; i < n; i++)
  95                 depths[i] = depthVal;
  96         FFBWriteDepthSpan(ctx, rb, n, x, y, depths, mask);
  97 }
  98
  99 static void FFBWriteDepthPixels( GLcontext *ctx,
 100                                    struct gl_renderbuffer *rb,
 101                                    GLuint n,
 102                                    const GLint x[],
 103                                    const GLint y[],
 104                                    const void *values,
 105                                    const GLubyte mask[] )
 106 {
 107         const GLuint *depth = (const GLuint *) values;
 108 #ifdef DEPTH_TRACE
 109         fprintf(stderr, "FFBWriteDepthPixels: n(%d)\n", (int) n);
 110 #endif
 111         if (ctx->Depth.Mask) {
 112                 ffbContextPtr fmesa = FFB_CONTEXT(ctx);
 113                 __DRIdrawablePrivate *dPriv = fmesa->driDrawable;
 114                 char *zbase;
 115                 GLuint i;
 116
 117                 if (!fmesa->hw_locked)
 118                         LOCK_HARDWARE(fmesa);
 119                 FFBFifo(fmesa, 2);
 120                 fmesa->regs->fbc = (FFB_FBC_WB_C | FFB_FBC_ZE_ON |
 121                                     FFB_FBC_YE_OFF | FFB_FBC_RGBE_OFF);
 122                 fmesa->regs->ppc = FFB_PPC_ZS_VAR;
 123                 fmesa->ffbScreen->rp_active = 1;
 124                 FFBWait(fmesa, fmesa->regs);
 125
 126                 zbase = ((char *)fmesa->sfb32 +
 127                          (dPriv->x << 2) + (dPriv->y << 13));
 128
 129                 for (i = 0; i < n; i++) {
 130                         GLint y1 = (dPriv->h - y[i]);
 131                         GLint x1 = x[i];
 132                         GLuint *zptr;
 133
 134                         zptr = (GLuint *)
 135                                 (zbase + (x1 << 2) + (y1 << 13));
 136                         if (mask[i])
 137                                 *zptr = Z_FROM_MESA(depth[i]);
 138                 }
 139
 140                 FFBFifo(fmesa, 2);
 141                 fmesa->regs->fbc = fmesa->fbc;
 142                 fmesa->regs->ppc = fmesa->ppc;
 143                 fmesa->ffbScreen->rp_active = 1;
 144                 if (!fmesa->hw_locked)
 145                         UNLOCK_HARDWARE(fmesa);
 146         }
 147 }
 148
 149 static void FFBReadDepthSpan( GLcontext *ctx,
 150                                 struct gl_renderbuffer *rb,
 151                                 GLuint n, GLint x, GLint y,
 152                                 void *values )
 153 {
 154         GLuint *depth = (GLuint *) values;
 155         ffbContextPtr fmesa = FFB_CONTEXT(ctx);
 156         __DRIdrawablePrivate *dPriv = fmesa->driDrawable;
 157         GLuint *zptr;
 158         GLuint i;
 159
 160 #ifdef DEPTH_TRACE
 161         fprintf(stderr, "FFBReadDepthSpan: n(%d) x(%d) y(%d)\n",
 162                 (int) n, x, y);
 163 #endif
 164         if (!fmesa->hw_locked)
 165                 LOCK_HARDWARE(fmesa);
 166         FFBFifo(fmesa, 1);
 167         fmesa->regs->fbc = FFB_FBC_RB_C;
 168         fmesa->ffbScreen->rp_active = 1;
 169         FFBWait(fmesa, fmesa->regs);
 170
 171         y = (dPriv->h - y);
 172         zptr = (GLuint *)
 173                 ((char *)fmesa->sfb32 +
 174                  ((dPriv->x + x) << 2) +
 175                  ((dPriv->y + y) << 13));
 176
 177         for (i = 0; i < n; i++) {
 178                 depth[i] = Z_TO_MESA(*zptr);
 179                 zptr++;
 180         }
 181
 182         FFBFifo(fmesa, 1);
 183         fmesa->regs->fbc = fmesa->fbc;
 184         fmesa->ffbScreen->rp_active = 1;
 185         if (!fmesa->hw_locked)
 186                 UNLOCK_HARDWARE(fmesa);
 187 }
 188
 189 static void FFBReadDepthPixels( GLcontext *ctx,
 190                                   struct gl_renderbuffer *rb,
 191                                   GLuint n,
 192                                   const GLint x[], const GLint y[],
 193                                   void *values )
 194 {
 195         GLuint *depth = (GLuint *) values;
 196         ffbContextPtr fmesa = FFB_CONTEXT(ctx);
 197         __DRIdrawablePrivate *dPriv = fmesa->driDrawable;
 198         char *zbase;
 199         GLuint i;
 200
 201 #ifdef DEPTH_TRACE
 202         fprintf(stderr, "FFBReadDepthPixels: n(%d)\n", (int) n);
 203 #endif
 204         if (!fmesa->hw_locked)
 205                 LOCK_HARDWARE(fmesa);
 206         FFBFifo(fmesa, 1);
 207         fmesa->regs->fbc = FFB_FBC_RB_C;
 208         fmesa->ffbScreen->rp_active = 1;
 209         FFBWait(fmesa, fmesa->regs);
 210
 211         zbase = ((char *)fmesa->sfb32 +
 212                  (dPriv->x << 2) + (dPriv->y << 13));
 213
 214         for (i = 0; i < n; i++) {
 215                 GLint y1 = (dPriv->h - y[i]);
 216                 GLint x1 = x[i];
 217                 GLuint *zptr;
 218
 219                 zptr = (GLuint *)
 220                         (zbase + (x1 << 2) + (y1 << 13));
 221                 depth[i] = Z_TO_MESA(*zptr);
 222         }
 223
 224         FFBFifo(fmesa, 1);
 225         fmesa->regs->fbc = fmesa->fbc;
 226         fmesa->ffbScreen->rp_active = 1;
 227         if (!fmesa->hw_locked)
 228                 UNLOCK_HARDWARE(fmesa);
 229 }
 230
 231 /**
 232  * Plug in the Get/Put routines for the given driRenderbuffer.
 233  */
 234 void
 235 ffbSetDepthFunctions(driRenderbuffer *drb, const GLvisual *vis)
 236 {
 237         assert(drb->Base.InternalFormat == GL_DEPTH_COMPONENT16);
 238         drb->Base.GetRow        = FFBReadDepthSpan;
 239         drb->Base.GetValues     = FFBReadDepthPixels;
 240         drb->Base.PutRow        = FFBWriteDepthSpan;
 241         drb->Base.PutMonoRow    = FFBWriteMonoDepthSpan;
 242         drb->Base.PutValues     = FFBWriteDepthPixels;
 243         drb->Base.PutMonoValues = NULL;
 244 }