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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   9  * without limitation the rights to use, copy, modify, merge, publish,
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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 #include "state_tracker/drm_driver.h"
  38
  39 #include "pipe/p_context.h"
  40 #include "state_tracker/st_context.h"
  41
  42 static void
  43 dri_pp_query(struct dri_context *ctx)
  44 {
  45    unsigned int i;
  46
  47    for (i = 0; i < PP_FILTERS; i++) {
  48       ctx->pp_enabled[i] = driQueryOptioni(&ctx->optionCache, pp_filters[i].name);
  49    }
  50 }
  51
  52 static void dri_fill_st_options(struct st_config_options *options,
  53                                 const struct driOptionCache * optionCache)
  54 {
  55    options->force_glsl_extensions_warn =
  56       driQueryOptionb(optionCache, "force_glsl_extensions_warn");
  57    options->disable_glsl_line_continuations =
  58       driQueryOptionb(optionCache, "disable_glsl_line_continuations");
  59    options->disable_blend_func_extended =
  60       driQueryOptionb(optionCache, "disable_blend_func_extended");
  61    options->force_s3tc_enable =
  62       driQueryOptionb(optionCache, "force_s3tc_enable");
  63 }
  64
  65 GLboolean
  66 dri_create_context(gl_api api, const struct gl_config * visual,
  67                    __DRIcontext * cPriv,
  68                    unsigned major_version,
  69                    unsigned minor_version,
  70                    uint32_t flags,
  71                    unsigned *error,
  72                    void *sharedContextPrivate)
  73 {
  74    __DRIscreen *sPriv = cPriv->driScreenPriv;
  75    struct dri_screen *screen = dri_screen(sPriv);
  76    struct st_api *stapi = screen->st_api;
  77    struct dri_context *ctx = NULL;
  78    struct st_context_iface *st_share = NULL;
  79    struct st_context_attribs attribs;
  80    enum st_context_error ctx_err = 0;
  81
  82    memset(&attribs, 0, sizeof(attribs));
  83    switch (api) {
  84    case API_OPENGLES:
  85       attribs.profile = ST_PROFILE_OPENGL_ES1;
  86       break;
  87    case API_OPENGLES2:
  88       attribs.profile = ST_PROFILE_OPENGL_ES2;
  89       break;
  90    case API_OPENGL_COMPAT:
  91    case API_OPENGL_CORE:
  92       attribs.profile = api == API_OPENGL_COMPAT ? ST_PROFILE_DEFAULT
  93                                                  : ST_PROFILE_OPENGL_CORE;
  94       attribs.major = major_version;
  95       attribs.minor = minor_version;
  96
  97       if ((flags & __DRI_CTX_FLAG_DEBUG) != 0)
  98          attribs.flags |= ST_CONTEXT_FLAG_DEBUG;
  99
 100       if ((flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0)
 101          attribs.flags |= ST_CONTEXT_FLAG_FORWARD_COMPATIBLE;
 102       break;
 103    default:
 104       *error = __DRI_CTX_ERROR_BAD_API;
 105       goto fail;
 106    }
 107
 108    if (sharedContextPrivate) {
 109       st_share = ((struct dri_context *)sharedContextPrivate)->st;
 110    }
 111
 112    ctx = CALLOC_STRUCT(dri_context);
 113    if (ctx == NULL) {
 114       *error = __DRI_CTX_ERROR_NO_MEMORY;
 115       goto fail;
 116    }
 117
 118    cPriv->driverPrivate = ctx;
 119    ctx->cPriv = cPriv;
 120    ctx->sPriv = sPriv;
 121
 122    driParseConfigFiles(&ctx->optionCache,
 123                        &screen->optionCacheDefaults,
 124                        sPriv->myNum, driver_descriptor.name);
 125
 126    dri_fill_st_options(&attribs.options, &ctx->optionCache);
 127    dri_fill_st_visual(&attribs.visual, screen, visual);
 128    ctx->st = stapi->create_context(stapi, &screen->base, &attribs, &ctx_err,
 129                                    st_share);
 130    if (ctx->st == NULL) {
 131       switch (ctx_err) {
 132       case ST_CONTEXT_SUCCESS:
 133          *error = __DRI_CTX_ERROR_SUCCESS;
 134          break;
 135       case ST_CONTEXT_ERROR_NO_MEMORY:
 136          *error = __DRI_CTX_ERROR_NO_MEMORY;
 137          break;
 138       case ST_CONTEXT_ERROR_BAD_API:
 139          *error = __DRI_CTX_ERROR_BAD_API;
 140          break;
 141       case ST_CONTEXT_ERROR_BAD_VERSION:
 142          *error = __DRI_CTX_ERROR_BAD_VERSION;
 143          break;
 144       case ST_CONTEXT_ERROR_BAD_FLAG:
 145          *error = __DRI_CTX_ERROR_BAD_FLAG;
 146          break;
 147       case ST_CONTEXT_ERROR_UNKNOWN_ATTRIBUTE:
 148          *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
 149          break;
 150       case ST_CONTEXT_ERROR_UNKNOWN_FLAG:
 151          *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
 152          break;
 153       }
 154       goto fail;
 155    }
 156    ctx->st->st_manager_private = (void *) ctx;
 157    ctx->stapi = stapi;
 158
 159    // Context successfully created. See if post-processing is requested.
 160    dri_pp_query(ctx);
 161
 162    if (ctx->st->cso_context) {
 163       ctx->pp = pp_init(ctx->st->pipe, ctx->pp_enabled, ctx->st->cso_context);
 164       ctx->hud = hud_create(ctx->st->pipe, ctx->st->cso_context);
 165    }
 166
 167    *error = __DRI_CTX_ERROR_SUCCESS;
 168    return GL_TRUE;
 169
 170  fail:
 171    if (ctx && ctx->st)
 172       ctx->st->destroy(ctx->st);
 173
 174    free(ctx);
 175    return GL_FALSE;
 176 }
 177
 178 void
 179 dri_destroy_context(__DRIcontext * cPriv)
 180 {
 181    struct dri_context *ctx = dri_context(cPriv);
 182
 183    if (ctx->hud) {
 184       hud_destroy(ctx->hud);
 185    }
 186
 187    /* note: we are freeing values and nothing more because
 188     * driParseConfigFiles allocated values only - the rest
 189     * is owned by screen optionCacheDefaults.
 190     */
 191    free(ctx->optionCache.values);
 192
 193    /* No particular reason to wait for command completion before
 194     * destroying a context, but we flush the context here
 195     * to avoid having to add code elsewhere to cope with flushing a
 196     * partially destroyed context.
 197     */
 198    ctx->st->flush(ctx->st, 0, NULL);
 199    ctx->st->destroy(ctx->st);
 200
 201    if (ctx->pp) pp_free(ctx->pp);
 202
 203    free(ctx);
 204 }
 205
 206 GLboolean
 207 dri_unbind_context(__DRIcontext * cPriv)
 208 {
 209    /* dri_util.c ensures cPriv is not null */
 210    struct dri_screen *screen = dri_screen(cPriv->driScreenPriv);
 211    struct dri_context *ctx = dri_context(cPriv);
 212    struct st_api *stapi = screen->st_api;
 213
 214    if (--ctx->bind_count == 0) {
 215       if (ctx->st == ctx->stapi->get_current(ctx->stapi)) {
 216          /* For conformance, unbind is supposed to flush the context.
 217           * However, if we do it here we might end up flushing a partially
 218           * destroyed context. Instead, we flush in dri_make_current and
 219           * in dri_destroy_context which should cover all the cases.
 220           */
 221          stapi->make_current(stapi, NULL, NULL, NULL);
 222       }
 223    }
 224
 225    return GL_TRUE;
 226 }
 227
 228 GLboolean
 229 dri_make_current(__DRIcontext * cPriv,
 230                  __DRIdrawable * driDrawPriv,
 231                  __DRIdrawable * driReadPriv)
 232 {
 233    /* dri_util.c ensures cPriv is not null */
 234    struct dri_context *ctx = dri_context(cPriv);
 235    struct dri_drawable *draw = dri_drawable(driDrawPriv);
 236    struct dri_drawable *read = dri_drawable(driReadPriv);
 237    struct st_context_iface *old_st = ctx->stapi->get_current(ctx->stapi);
 238
 239    /* Flush the old context here so we don't have to flush on unbind() */
 240    if (old_st && old_st != ctx->st)
 241       old_st->flush(old_st, ST_FLUSH_FRONT, NULL);
 242
 243    ++ctx->bind_count;
 244
 245    if (!driDrawPriv && !driReadPriv)
 246       return ctx->stapi->make_current(ctx->stapi, ctx->st, NULL, NULL);
 247    else if (!driDrawPriv || !driReadPriv)
 248       return GL_FALSE;
 249
 250    if (ctx->dPriv != driDrawPriv) {
 251       ctx->dPriv = driDrawPriv;
 252       draw->texture_stamp = driDrawPriv->lastStamp - 1;
 253    }
 254    if (ctx->rPriv != driReadPriv) {
 255       ctx->rPriv = driReadPriv;
 256       read->texture_stamp = driReadPriv->lastStamp - 1;
 257    }
 258
 259    ctx->stapi->make_current(ctx->stapi, ctx->st, &draw->base, &read->base);
 260
 261    // This is ok to call here. If they are already init, it's a no-op.
 262    if (draw->textures[ST_ATTACHMENT_BACK_LEFT] && draw->textures[ST_ATTACHMENT_DEPTH_STENCIL]
 263       && ctx->pp)
 264          pp_init_fbos(ctx->pp, draw->textures[ST_ATTACHMENT_BACK_LEFT]->width0,
 265             draw->textures[ST_ATTACHMENT_BACK_LEFT]->height0);
 266
 267    return GL_TRUE;
 268 }
 269
 270 struct dri_context *
 271 dri_get_current(__DRIscreen *sPriv)
 272 {
 273    struct dri_screen *screen = dri_screen(sPriv);
 274    struct st_api *stapi = screen->st_api;
 275    struct st_context_iface *st;
 276
 277    st = stapi->get_current(stapi);
 278
 279    return (struct dri_context *) (st) ? st->st_manager_private : NULL;
 280 }
 281
 282 /* vim: set sw=3 ts=8 sts=3 expandtab: */