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

   1 /*
   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 "ffb_dd.h"
  30 #include "ffb_span.h"
  31 #include "ffb_context.h"
  32 #include "ffb_depth.h"
  33 #include "ffb_lock.h"
  34
  35
  36 #undef DEPTH_TRACE
  37
  38 static void FFBWriteDepthSpan( GLcontext *ctx,
  39                                  struct gl_renderbuffer *rb,
  40                                  GLuint n, GLint x, GLint y,
  41                                  const void *values,
  42                                  const GLubyte mask[] )
  43 {
  44         const GLuint *depth = (const GLuint *) values;
  45 #ifdef DEPTH_TRACE
  46         fprintf(stderr, "FFBWriteDepthSpan: n(%d) x(%d) y(%d)\n",
  47                 (int) n, x, y);
  48 #endif
  49         if (ctx->Depth.Mask) {
  50                 ffbContextPtr fmesa = FFB_CONTEXT(ctx);
  51                 __DRIdrawable *dPriv = fmesa->driDrawable;
  52                 GLuint *zptr;
  53                 GLuint i;
  54
  55                 if (!fmesa->hw_locked)
  56                         LOCK_HARDWARE(fmesa);
  57                 FFBFifo(fmesa, 2);
  58                 fmesa->regs->fbc = (FFB_FBC_WB_C | FFB_FBC_ZE_ON |
  59                                     FFB_FBC_YE_OFF | FFB_FBC_RGBE_OFF);
  60                 fmesa->regs->ppc = FFB_PPC_ZS_VAR;
  61                 FFBWait(fmesa, fmesa->regs);
  62
  63                 y = (dPriv->h - y);
  64                 zptr = (GLuint *)
  65                         ((char *)fmesa->sfb32 +
  66                          ((dPriv->x + x) << 2) +
  67                          ((dPriv->y + y) << 13));
  68
  69                 for (i = 0; i < n; i++) {
  70                         if (mask[i]) {
  71                                 *zptr = Z_FROM_MESA(depth[i]);
  72                         }
  73                         zptr++;
  74                 }
  75
  76                 FFBFifo(fmesa, 2);
  77                 fmesa->regs->fbc = fmesa->fbc;
  78                 fmesa->regs->ppc = fmesa->ppc;
  79                 fmesa->ffbScreen->rp_active = 1;
  80                 if (!fmesa->hw_locked)
  81                         UNLOCK_HARDWARE(fmesa);
  82         }
  83 }
  84
  85 static void FFBWriteMonoDepthSpan( GLcontext *ctx,
  86                                      struct gl_renderbuffer *rb,
  87                                      GLuint n, GLint x, GLint y,
  88                                      const void *value, const GLubyte mask[] )
  89 {
  90         const GLuint depthVal = *((GLuint *) value);
  91         GLuint depths[MAX_WIDTH];
  92         GLuint i;
  93         for (i = 0; i < n; i++)
  94                 depths[i] = depthVal;
  95         FFBWriteDepthSpan(ctx, rb, n, x, y, depths, mask);
  96 }
  97
  98 static void FFBWriteDepthPixels( GLcontext *ctx,
  99                                    struct gl_renderbuffer *rb,
 100                                    GLuint n,
 101                                    const GLint x[],
 102                                    const GLint y[],
 103                                    const void *values,
 104                                    const GLubyte mask[] )
 105 {
 106         const GLuint *depth = (const GLuint *) values;
 107 #ifdef DEPTH_TRACE
 108         fprintf(stderr, "FFBWriteDepthPixels: n(%d)\n", (int) n);
 109 #endif
 110         if (ctx->Depth.Mask) {
 111                 ffbContextPtr fmesa = FFB_CONTEXT(ctx);
 112                 __DRIdrawable *dPriv = fmesa->driDrawable;
 113                 char *zbase;
 114                 GLuint i;
 115
 116                 if (!fmesa->hw_locked)
 117                         LOCK_HARDWARE(fmesa);
 118                 FFBFifo(fmesa, 2);
 119                 fmesa->regs->fbc = (FFB_FBC_WB_C | FFB_FBC_ZE_ON |
 120                                     FFB_FBC_YE_OFF | FFB_FBC_RGBE_OFF);
 121                 fmesa->regs->ppc = FFB_PPC_ZS_VAR;
 122                 fmesa->ffbScreen->rp_active = 1;
 123                 FFBWait(fmesa, fmesa->regs);
 124
 125                 zbase = ((char *)fmesa->sfb32 +
 126                          (dPriv->x << 2) + (dPriv->y << 13));
 127
 128                 for (i = 0; i < n; i++) {
 129                         GLint y1 = (dPriv->h - y[i]);
 130                         GLint x1 = x[i];
 131                         GLuint *zptr;
 132
 133                         zptr = (GLuint *)
 134                                 (zbase + (x1 << 2) + (y1 << 13));
 135                         if (mask[i])
 136                                 *zptr = Z_FROM_MESA(depth[i]);
 137                 }
 138
 139                 FFBFifo(fmesa, 2);
 140                 fmesa->regs->fbc = fmesa->fbc;
 141                 fmesa->regs->ppc = fmesa->ppc;
 142                 fmesa->ffbScreen->rp_active = 1;
 143                 if (!fmesa->hw_locked)
 144                         UNLOCK_HARDWARE(fmesa);
 145         }
 146 }
 147
 148 static void FFBReadDepthSpan( GLcontext *ctx,
 149                                 struct gl_renderbuffer *rb,
 150                                 GLuint n, GLint x, GLint y,
 151                                 void *values )
 152 {
 153         GLuint *depth = (GLuint *) values;
 154         ffbContextPtr fmesa = FFB_CONTEXT(ctx);
 155         __DRIdrawable *dPriv = fmesa->driDrawable;
 156         GLuint *zptr;
 157         GLuint i;
 158
 159 #ifdef DEPTH_TRACE
 160         fprintf(stderr, "FFBReadDepthSpan: n(%d) x(%d) y(%d)\n",
 161                 (int) n, x, y);
 162 #endif
 163         if (!fmesa->hw_locked)
 164                 LOCK_HARDWARE(fmesa);
 165         FFBFifo(fmesa, 1);
 166         fmesa->regs->fbc = FFB_FBC_RB_C;
 167         fmesa->ffbScreen->rp_active = 1;
 168         FFBWait(fmesa, fmesa->regs);
 169
 170         y = (dPriv->h - y);
 171         zptr = (GLuint *)
 172                 ((char *)fmesa->sfb32 +
 173                  ((dPriv->x + x) << 2) +
 174                  ((dPriv->y + y) << 13));
 175
 176         for (i = 0; i < n; i++) {
 177                 depth[i] = Z_TO_MESA(*zptr);
 178                 zptr++;
 179         }
 180
 181         FFBFifo(fmesa, 1);
 182         fmesa->regs->fbc = fmesa->fbc;
 183         fmesa->ffbScreen->rp_active = 1;
 184         if (!fmesa->hw_locked)
 185                 UNLOCK_HARDWARE(fmesa);
 186 }
 187
 188 static void FFBReadDepthPixels( GLcontext *ctx,
 189                                   struct gl_renderbuffer *rb,
 190                                   GLuint n,
 191                                   const GLint x[], const GLint y[],
 192                                   void *values )
 193 {
 194         GLuint *depth = (GLuint *) values;
 195         ffbContextPtr fmesa = FFB_CONTEXT(ctx);
 196         __DRIdrawable *dPriv = fmesa->driDrawable;
 197         char *zbase;
 198         GLuint i;
 199
 200 #ifdef DEPTH_TRACE
 201         fprintf(stderr, "FFBReadDepthPixels: n(%d)\n", (int) n);
 202 #endif
 203         if (!fmesa->hw_locked)
 204                 LOCK_HARDWARE(fmesa);
 205         FFBFifo(fmesa, 1);
 206         fmesa->regs->fbc = FFB_FBC_RB_C;
 207         fmesa->ffbScreen->rp_active = 1;
 208         FFBWait(fmesa, fmesa->regs);
 209
 210         zbase = ((char *)fmesa->sfb32 +
 211                  (dPriv->x << 2) + (dPriv->y << 13));
 212
 213         for (i = 0; i < n; i++) {
 214                 GLint y1 = (dPriv->h - y[i]);
 215                 GLint x1 = x[i];
 216                 GLuint *zptr;
 217
 218                 zptr = (GLuint *)
 219                         (zbase + (x1 << 2) + (y1 << 13));
 220                 depth[i] = Z_TO_MESA(*zptr);
 221         }
 222
 223         FFBFifo(fmesa, 1);
 224         fmesa->regs->fbc = fmesa->fbc;
 225         fmesa->ffbScreen->rp_active = 1;
 226         if (!fmesa->hw_locked)
 227                 UNLOCK_HARDWARE(fmesa);
 228 }
 229
 230 /**
 231  * Plug in the Get/Put routines for the given driRenderbuffer.
 232  */
 233 void
 234 ffbSetDepthFunctions(driRenderbuffer *drb, const GLvisual *vis)
 235 {
 236         assert(drb->Base.InternalFormat == GL_DEPTH_COMPONENT16);
 237         drb->Base.GetRow        = FFBReadDepthSpan;
 238         drb->Base.GetValues     = FFBReadDepthPixels;
 239         drb->Base.PutRow        = FFBWriteDepthSpan;
 240         drb->Base.PutMonoRow    = FFBWriteMonoDepthSpan;
 241         drb->Base.PutValues     = FFBWriteDepthPixels;
 242         drb->Base.PutMonoValues = NULL;
 243 }