src/mesa/drivers/dri/common/drisw_util.c

   1 /*
   2  * Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
   3  * All Rights Reserved.
   4  * Copyright 2010 George Sapountzis <gsapountzis@gmail.com>
   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  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  20  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 /**
  25  * \file drisw_util.c
  26  *
  27  * DRISW utility functions, i.e. dri_util.c stripped from drm-specific bits.
  28  */
  29
  30 #include "drisw_util.h"
  31 #include "utils.h"
  32
  33
  34 /**
  35  * Screen functions
  36  */
  37
  38 static void
  39 setupLoaderExtensions(__DRIscreen *psp,
  40                       const __DRIextension **extensions)
  41 {
  42     int i;
  43
  44     for (i = 0; extensions[i]; i++) {
  45         if (strcmp(extensions[i]->name, __DRI_SWRAST_LOADER) == 0)
  46             psp->swrast_loader = (__DRIswrastLoaderExtension *) extensions[i];
  47     }
  48 }
  49
  50 static __DRIscreen *
  51 driCreateNewScreen(int scrn, const __DRIextension **extensions,
  52                    const __DRIconfig ***driver_configs, void *data)
  53 {
  54     static const __DRIextension *emptyExtensionList[] = { NULL };
  55     __DRIscreen *psp;
  56
  57     (void) data;
  58
  59     psp = CALLOC_STRUCT(__DRIscreenRec);
  60     if (!psp)
  61         return NULL;
  62
  63     setupLoaderExtensions(psp, extensions);
  64
  65     psp->extensions = emptyExtensionList;
  66     psp->fd = -1;
  67     psp->myNum = scrn;
  68
  69     *driver_configs = driDriverAPI.InitScreen(psp);
  70
  71     if (*driver_configs == NULL) {
  72         FREE(psp);
  73         return NULL;
  74     }
  75
  76     return psp;
  77 }
  78
  79 static void driDestroyScreen(__DRIscreen *psp)
  80 {
  81     if (psp) {
  82         driDriverAPI.DestroyScreen(psp);
  83
  84         FREE(psp);
  85     }
  86 }
  87
  88 static const __DRIextension **driGetExtensions(__DRIscreen *psp)
  89 {
  90     return psp->extensions;
  91 }
  92
  93
  94 /**
  95  * Context functions
  96  */
  97
  98 static __DRIcontext *
  99 driCreateNewContext(__DRIscreen *psp, const __DRIconfig *config,
 100                     __DRIcontext *shared, void *data)
 101 {
 102     __DRIcontext *pcp;
 103     void * const shareCtx = (shared != NULL) ? shared->driverPrivate : NULL;
 104
 105     pcp = CALLOC_STRUCT(__DRIcontextRec);
 106     if (!pcp)
 107         return NULL;
 108
 109     pcp->loaderPrivate = data;
 110
 111     pcp->driScreenPriv = psp;
 112     pcp->driDrawablePriv = NULL;
 113     pcp->driReadablePriv = NULL;
 114
 115     if (!driDriverAPI.CreateContext(&config->modes, pcp, shareCtx)) {
 116         FREE(pcp);
 117         return NULL;
 118     }
 119
 120     return pcp;
 121 }
 122
 123 static void
 124 driDestroyContext(__DRIcontext *pcp)
 125 {
 126     if (pcp) {
 127         driDriverAPI.DestroyContext(pcp);
 128         FREE(pcp);
 129     }
 130 }
 131
 132 static int
 133 driCopyContext(__DRIcontext *dst, __DRIcontext *src, unsigned long mask)
 134 {
 135     return GL_FALSE;
 136 }
 137
 138 static void dri_get_drawable(__DRIdrawable *pdp);
 139 static void dri_put_drawable(__DRIdrawable *pdp);
 140
 141 static int driBindContext(__DRIcontext *pcp,
 142                           __DRIdrawable *pdp,
 143                           __DRIdrawable *prp)
 144 {
 145     /* Bind the drawable to the context */
 146     if (pcp) {
 147         pcp->driDrawablePriv = pdp;
 148         pcp->driReadablePriv = prp;
 149         if (pdp) {
 150             pdp->driContextPriv = pcp;
 151             dri_get_drawable(pdp);
 152         }
 153         if ( prp && pdp != prp ) {
 154             dri_get_drawable(prp);
 155         }
 156     }
 157
 158     return driDriverAPI.MakeCurrent(pcp, pdp, prp);
 159 }
 160
 161 static int driUnbindContext(__DRIcontext *pcp)
 162 {
 163     __DRIdrawable *pdp;
 164     __DRIdrawable *prp;
 165
 166     if (pcp == NULL)
 167         return GL_FALSE;
 168
 169     pdp = pcp->driDrawablePriv;
 170     prp = pcp->driReadablePriv;
 171
 172     /* already unbound */
 173     if (!pdp && !prp)
 174         return GL_TRUE;
 175
 176     driDriverAPI.UnbindContext(pcp);
 177
 178     dri_put_drawable(pdp);
 179
 180     if (prp != pdp) {
 181         dri_put_drawable(prp);
 182     }
 183
 184     pcp->driDrawablePriv = NULL;
 185     pcp->driReadablePriv = NULL;
 186
 187     return GL_TRUE;
 188 }
 189
 190
 191 /**
 192  * Drawable functions
 193  */
 194
 195 static void dri_get_drawable(__DRIdrawable *pdp)
 196 {
 197     pdp->refcount++;
 198 }
 199
 200 static void dri_put_drawable(__DRIdrawable *pdp)
 201 {
 202     if (pdp) {
 203         pdp->refcount--;
 204         if (pdp->refcount)
 205             return;
 206
 207         driDriverAPI.DestroyBuffer(pdp);
 208
 209         FREE(pdp);
 210     }
 211 }
 212
 213 static __DRIdrawable *
 214 driCreateNewDrawable(__DRIscreen *psp,
 215                      const __DRIconfig *config, void *data)
 216 {
 217     __DRIdrawable *pdp;
 218
 219     pdp = CALLOC_STRUCT(__DRIdrawableRec);
 220     if (!pdp)
 221         return NULL;
 222
 223     pdp->loaderPrivate = data;
 224
 225     pdp->driScreenPriv = psp;
 226     pdp->driContextPriv = NULL;
 227
 228     dri_get_drawable(pdp);
 229
 230     if (!driDriverAPI.CreateBuffer(psp, pdp, &config->modes, GL_FALSE)) {
 231         FREE(pdp);
 232         return NULL;
 233     }
 234
 235     pdp->lastStamp = 1; /* const */
 236
 237     return pdp;
 238 }
 239
 240 static void
 241 driDestroyDrawable(__DRIdrawable *pdp)
 242 {
 243     dri_put_drawable(pdp);
 244 }
 245
 246 static void driSwapBuffers(__DRIdrawable *pdp)
 247 {
 248     driDriverAPI.SwapBuffers(pdp);
 249 }
 250
 251 const __DRIcoreExtension driCoreExtension = {
 252     { __DRI_CORE, __DRI_CORE_VERSION },
 253     NULL, /* driCreateNewScreen */
 254     driDestroyScreen,
 255     driGetExtensions,
 256     driGetConfigAttrib,
 257     driIndexConfigAttrib,
 258     NULL, /* driCreateNewDrawable */
 259     driDestroyDrawable,
 260     driSwapBuffers,
 261     driCreateNewContext,
 262     driCopyContext,
 263     driDestroyContext,
 264     driBindContext,
 265     driUnbindContext
 266 };
 267
 268 const __DRIswrastExtension driSWRastExtension = {
 269     { __DRI_SWRAST, __DRI_SWRAST_VERSION },
 270     driCreateNewScreen,
 271     driCreateNewDrawable
 272 };