src/gallium/state_trackers/dri/common/dri_context.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009, VMware, Inc.
   4  * All Rights Reserved.
   5  *
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   7  * copy of this software and associated documentation files (the
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  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27 /*
  28  * Author: Keith Whitwell <keithw@vmware.com>
  29  * Author: Jakob Bornecrantz <wallbraker@gmail.com>
  30  */
  31
  32 #include "utils.h"
  33
  34 #include "dri_screen.h"
  35 #include "dri_drawable.h"
  36 #include "dri_context.h"
  37
  38 #include "pipe/p_context.h"
  39 #include "state_tracker/st_context.h"
  40
  41 static void
  42 dri_init_extensions(struct dri_context *ctx)
  43 {
  44    struct st_context *st = (struct st_context *) ctx->st;
  45
  46    /* New extensions should be added in mesa/state_tracker/st_extensions.c
  47     * and not in this file. */
  48    driInitExtensions(st->ctx, NULL, GL_FALSE);
  49 }
  50
  51 static void
  52 dri_pp_query(struct dri_context *ctx)
  53 {
  54    unsigned int i;
  55
  56    for (i = 0; i < PP_FILTERS; i++) {
  57       ctx->pp_enabled[i] = driQueryOptioni(&ctx->optionCache, pp_filters[i].name);
  58    }
  59 }
  60
  61 GLboolean
  62 dri_create_context(gl_api api, const struct gl_config * visual,
  63                    __DRIcontext * cPriv, void *sharedContextPrivate)
  64 {
  65    __DRIscreen *sPriv = cPriv->driScreenPriv;
  66    struct dri_screen *screen = dri_screen(sPriv);
  67    struct st_api *stapi = screen->st_api;
  68    struct dri_context *ctx = NULL;
  69    struct st_context_iface *st_share = NULL;
  70    struct st_context_attribs attribs;
  71
  72    memset(&attribs, 0, sizeof(attribs));
  73    switch (api) {
  74    case API_OPENGLES:
  75       attribs.profile = ST_PROFILE_OPENGL_ES1;
  76       break;
  77    case API_OPENGLES2:
  78       attribs.profile = ST_PROFILE_OPENGL_ES2;
  79       break;
  80    default:
  81       attribs.profile = ST_PROFILE_DEFAULT;
  82       break;
  83    }
  84
  85    if (sharedContextPrivate) {
  86       st_share = ((struct dri_context *)sharedContextPrivate)->st;
  87    }
  88
  89    ctx = CALLOC_STRUCT(dri_context);
  90    if (ctx == NULL)
  91       goto fail;
  92
  93    cPriv->driverPrivate = ctx;
  94    ctx->cPriv = cPriv;
  95    ctx->sPriv = sPriv;
  96    ctx->lock = screen->drmLock;
  97
  98    driParseConfigFiles(&ctx->optionCache,
  99                        &screen->optionCache, sPriv->myNum, "dri");
 100
 101    dri_fill_st_visual(&attribs.visual, screen, visual);
 102    ctx->st = stapi->create_context(stapi, &screen->base, &attribs, st_share);
 103    if (ctx->st == NULL)
 104       goto fail;
 105    ctx->st->st_manager_private = (void *) ctx;
 106    ctx->stapi = stapi;
 107
 108    /*
 109     * libmesagallium.a that this state tracker will be linked to expects
 110     * OpenGL's _glapi_table.  That is, it expects libGL.so instead of
 111     * libGLESv1_CM.so or libGLESv2.so.  As there is no clean way to know the
 112     * shared library the app links to, use the api as a simple check.
 113     * It might be as well to simply remove this function call though.
 114     */
 115    if (api == API_OPENGL)
 116       dri_init_extensions(ctx);
 117
 118    // Context successfully created. See if post-processing is requested.
 119    dri_pp_query(ctx);
 120
 121    ctx->pp = pp_init(screen->base.screen, ctx->pp_enabled);
 122
 123    return GL_TRUE;
 124
 125  fail:
 126    if (ctx && ctx->st)
 127       ctx->st->destroy(ctx->st);
 128
 129    FREE(ctx);
 130    return GL_FALSE;
 131 }
 132
 133 void
 134 dri_destroy_context(__DRIcontext * cPriv)
 135 {
 136    struct dri_context *ctx = dri_context(cPriv);
 137
 138    /* note: we are freeing values and nothing more because
 139     * driParseConfigFiles allocated values only - the rest
 140     * is owned by screen optionCache.
 141     */
 142    FREE(ctx->optionCache.values);
 143
 144    /* No particular reason to wait for command completion before
 145     * destroying a context, but it is probably worthwhile flushing it
 146     * to avoid having to add code elsewhere to cope with flushing a
 147     * partially destroyed context.
 148     */
 149    ctx->st->flush(ctx->st, 0, NULL);
 150    ctx->st->destroy(ctx->st);
 151
 152    if (ctx->pp) pp_free(ctx->pp);
 153
 154    FREE(ctx);
 155 }
 156
 157 GLboolean
 158 dri_unbind_context(__DRIcontext * cPriv)
 159 {
 160    /* dri_util.c ensures cPriv is not null */
 161    struct dri_screen *screen = dri_screen(cPriv->driScreenPriv);
 162    struct dri_context *ctx = dri_context(cPriv);
 163    struct st_api *stapi = screen->st_api;
 164
 165    if (--ctx->bind_count == 0) {
 166       if (ctx->st == ctx->stapi->get_current(ctx->stapi)) {
 167          ctx->st->flush(ctx->st, ST_FLUSH_FRONT, NULL);
 168          stapi->make_current(stapi, NULL, NULL, NULL);
 169       }
 170    }
 171
 172    return GL_TRUE;
 173 }
 174
 175 GLboolean
 176 dri_make_current(__DRIcontext * cPriv,
 177                  __DRIdrawable * driDrawPriv,
 178                  __DRIdrawable * driReadPriv)
 179 {
 180    /* dri_util.c ensures cPriv is not null */
 181    struct dri_context *ctx = dri_context(cPriv);
 182    struct dri_drawable *draw = dri_drawable(driDrawPriv);
 183    struct dri_drawable *read = dri_drawable(driReadPriv);
 184    struct st_context_iface *old_st = ctx->stapi->get_current(ctx->stapi);
 185
 186    if (old_st && old_st != ctx->st)
 187       old_st->flush(old_st, ST_FLUSH_FRONT, NULL);
 188
 189    ++ctx->bind_count;
 190
 191    if (!driDrawPriv && !driReadPriv)
 192       return ctx->stapi->make_current(ctx->stapi, ctx->st, NULL, NULL);
 193    else if (!driDrawPriv || !driReadPriv)
 194       return GL_FALSE;
 195
 196    if (ctx->dPriv != driDrawPriv) {
 197       ctx->dPriv = driDrawPriv;
 198       draw->texture_stamp = driDrawPriv->lastStamp - 1;
 199    }
 200    if (ctx->rPriv != driReadPriv) {
 201       ctx->rPriv = driReadPriv;
 202       read->texture_stamp = driReadPriv->lastStamp - 1;
 203    }
 204
 205    ctx->stapi->make_current(ctx->stapi, ctx->st, &draw->base, &read->base);
 206
 207    // This is ok to call here. If they are already init, it's a no-op.
 208    if (draw->textures[ST_ATTACHMENT_BACK_LEFT] && draw->textures[ST_ATTACHMENT_DEPTH_STENCIL]
 209       && ctx->pp)
 210          pp_init_fbos(ctx->pp, draw->textures[ST_ATTACHMENT_BACK_LEFT]->width0,
 211             draw->textures[ST_ATTACHMENT_BACK_LEFT]->height0,
 212             draw->textures[ST_ATTACHMENT_DEPTH_STENCIL]);
 213
 214    return GL_TRUE;
 215 }
 216
 217 struct dri_context *
 218 dri_get_current(__DRIscreen *sPriv)
 219 {
 220    struct dri_screen *screen = dri_screen(sPriv);
 221    struct st_api *stapi = screen->st_api;
 222    struct st_context_iface *st;
 223
 224    st = stapi->get_current(stapi);
 225
 226    return (struct dri_context *) (st) ? st->st_manager_private : NULL;
 227 }
 228
 229 /* vim: set sw=3 ts=8 sts=3 expandtab: */