/**
 * Free the CSO context.
 */
void cso_destroy_context( struct cso_context *ctx )
{
   unsigned i;

   if (ctx->pipe) {
      ctx->pipe->set_index_buffer(ctx->pipe, NULL);

      ctx->pipe->bind_blend_state( ctx->pipe, NULL );
      ctx->pipe->bind_rasterizer_state( ctx->pipe, NULL );

      {
         static struct pipe_sampler_view *views[PIPE_MAX_SHADER_SAMPLER_VIEWS] = { NULL };
         static void *zeros[PIPE_MAX_SAMPLERS] = { NULL };
         struct pipe_screen *scr = ctx->pipe->screen;
         unsigned sh;
         for (sh = 0; sh < PIPE_SHADER_TYPES; sh++) {
            int maxsam = scr->get_shader_param(scr, sh,
                                               PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS);
            int maxview = scr->get_shader_param(scr, sh,
                                                PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS);
            assert(maxsam <= PIPE_MAX_SAMPLERS);
            assert(maxview <= PIPE_MAX_SHADER_SAMPLER_VIEWS);
            if (maxsam > 0) {
               ctx->pipe->bind_sampler_states(ctx->pipe, sh, 0, maxsam, zeros);
            }
            if (maxview > 0) {
               ctx->pipe->set_sampler_views(ctx->pipe, sh, 0, maxview, views);
            }
         }
      }

      ctx->pipe->bind_depth_stencil_alpha_state( ctx->pipe, NULL );
      ctx->pipe->bind_fs_state( ctx->pipe, NULL );
      ctx->pipe->set_constant_buffer(ctx->pipe, PIPE_SHADER_FRAGMENT, 0, NULL);
      ctx->pipe->bind_vs_state( ctx->pipe, NULL );
      ctx->pipe->set_constant_buffer(ctx->pipe, PIPE_SHADER_VERTEX, 0, NULL);
      if (ctx->has_geometry_shader) {
         ctx->pipe->bind_gs_state(ctx->pipe, NULL);
         ctx->pipe->set_constant_buffer(ctx->pipe, PIPE_SHADER_GEOMETRY, 0, NULL);
      }
      if (ctx->has_tessellation) {
         ctx->pipe->bind_tcs_state(ctx->pipe, NULL);
         ctx->pipe->set_constant_buffer(ctx->pipe, PIPE_SHADER_TESS_CTRL, 0, NULL);
         ctx->pipe->bind_tes_state(ctx->pipe, NULL);
         ctx->pipe->set_constant_buffer(ctx->pipe, PIPE_SHADER_TESS_EVAL, 0, NULL);
      }
      ctx->pipe->bind_vertex_elements_state( ctx->pipe, NULL );

      if (ctx->has_streamout)
         ctx->pipe->set_stream_output_targets(ctx->pipe, 0, NULL, NULL);
   }

   for (i = 0; i < PIPE_MAX_SHADER_SAMPLER_VIEWS; i++) {
      pipe_sampler_view_reference(&ctx->fragment_views[i], NULL);
      pipe_sampler_view_reference(&ctx->fragment_views_saved[i], NULL);
   }

   util_unreference_framebuffer_state(&ctx->fb);
   util_unreference_framebuffer_state(&ctx->fb_saved);

   pipe_resource_reference(&ctx->aux_vertex_buffer_current.buffer, NULL);
   pipe_resource_reference(&ctx->aux_vertex_buffer_saved.buffer, NULL);

   for (i = 0; i < PIPE_SHADER_TYPES; i++) {
      pipe_resource_reference(&ctx->aux_constbuf_current[i].buffer, NULL);
      pipe_resource_reference(&ctx->aux_constbuf_saved[i].buffer, NULL);
   }

   for (i = 0; i < PIPE_MAX_SO_BUFFERS; i++) {
      pipe_so_target_reference(&ctx->so_targets[i], NULL);
      pipe_so_target_reference(&ctx->so_targets_saved[i], NULL);
   }

   if (ctx->cache) {
      cso_cache_delete( ctx->cache );
      ctx->cache = NULL;
   }

   if (ctx->vbuf)
      u_vbuf_destroy(ctx->vbuf);
   FREE( ctx );
}

static boolean
st_context_teximage(struct st_context_iface *stctxi,
                    enum st_texture_type tex_type,
                    int level, enum pipe_format pipe_format,
                    struct pipe_resource *tex, boolean mipmap)
{
   struct st_context *st = (struct st_context *) stctxi;
   struct gl_context *ctx = st->ctx;
   struct gl_texture_object *texObj;
   struct gl_texture_image *texImage;
   struct st_texture_object *stObj;
   struct st_texture_image *stImage;
   GLenum internalFormat;
   GLuint width, height, depth;
   GLenum target;

   switch (tex_type) {
   case ST_TEXTURE_1D:
      target = GL_TEXTURE_1D;
      break;
   case ST_TEXTURE_2D:
      target = GL_TEXTURE_2D;
      break;
   case ST_TEXTURE_3D:
      target = GL_TEXTURE_3D;
      break;
   case ST_TEXTURE_RECT:
      target = GL_TEXTURE_RECTANGLE_ARB;
      break;
   default:
      return FALSE;
   }

   texObj = _mesa_get_current_tex_object(ctx, target);

   _mesa_lock_texture(ctx, texObj);

   stObj = st_texture_object(texObj);
   /* switch to surface based */
   if (!stObj->surface_based) {
      _mesa_clear_texture_object(ctx, texObj);
      stObj->surface_based = GL_TRUE;
   }

   texImage = _mesa_get_tex_image(ctx, texObj, target, level);
   stImage = st_texture_image(texImage);
   if (tex) {
      mesa_format texFormat = st_pipe_format_to_mesa_format(pipe_format);

      if (util_format_has_alpha(tex->format))
         internalFormat = GL_RGBA;
      else
         internalFormat = GL_RGB;

      _mesa_init_teximage_fields(ctx, texImage,
                                 tex->width0, tex->height0, 1, 0,
                                 internalFormat, texFormat);

      width = tex->width0;
      height = tex->height0;
      depth = tex->depth0;

      /* grow the image size until we hit level = 0 */
      while (level > 0) {
         if (width != 1)
            width <<= 1;
         if (height != 1)
            height <<= 1;
         if (depth != 1)
            depth <<= 1;
         level--;
      }
   }
   else {
      _mesa_clear_texture_image(ctx, texImage);
      width = height = depth = 0;
   }

   pipe_resource_reference(&stImage->pt, tex);
   stObj->width0 = width;
   stObj->height0 = height;
   stObj->depth0 = depth;
   stObj->surface_format = pipe_format;

   _mesa_dirty_texobj(ctx, texObj);
   _mesa_unlock_texture(ctx, texObj);
   
   return TRUE;
}

/* Not required to implement u_resource_vtbl, consider moving to another file:
 */
struct pipe_surface* r300_get_tex_surface(struct pipe_screen* screen,
                                          struct pipe_resource* texture,
					  unsigned face,
					  unsigned level,
					  unsigned zslice,
					  unsigned flags)
{
    struct r300_texture* tex = r300_texture(texture);
    struct r300_surface* surface = CALLOC_STRUCT(r300_surface);

    if (surface) {
        uint32_t offset, tile_height;

        pipe_reference_init(&surface->base.reference, 1);
        pipe_resource_reference(&surface->base.texture, texture);
        surface->base.format = texture->format;
        surface->base.width = u_minify(texture->width0, level);
        surface->base.height = u_minify(texture->height0, level);
        surface->base.usage = flags;
        surface->base.zslice = zslice;
        surface->base.face = face;
        surface->base.level = level;

        surface->buffer = tex->buffer;

        /* Prefer VRAM if there are multiple domains to choose from. */
        surface->domain = tex->domain;
        if (surface->domain & R300_DOMAIN_VRAM)
            surface->domain &= ~R300_DOMAIN_GTT;

        surface->offset = r300_texture_get_offset(&tex->desc,
                                                  level, zslice, face);
        surface->pitch = tex->fb_state.pitch[level];
        surface->format = tex->fb_state.format;

        /* Parameters for the CBZB clear. */
        surface->cbzb_allowed = tex->desc.cbzb_allowed[level];
        surface->cbzb_width = align(surface->base.width, 64);

        /* Height must be aligned to the size of a tile. */
        tile_height = r300_get_pixel_alignment(tex->desc.b.b.format,
                                               tex->desc.b.b.nr_samples,
                                               tex->desc.microtile,
                                               tex->desc.macrotile[level],
                                               DIM_HEIGHT, 0);

        surface->cbzb_height = align((surface->base.height + 1) / 2,
                                     tile_height);

        /* Offset must be aligned to 2K and must point at the beginning
         * of a scanline. */
        offset = surface->offset +
                 tex->desc.stride_in_bytes[level] * surface->cbzb_height;
        surface->cbzb_midpoint_offset = offset & ~2047;

        surface->cbzb_pitch = surface->pitch & 0x1ffffc;

        if (util_format_get_blocksizebits(surface->base.format) == 32)
            surface->cbzb_format = R300_DEPTHFORMAT_24BIT_INT_Z_8BIT_STENCIL;
        else
            surface->cbzb_format = R300_DEPTHFORMAT_16BIT_INT_Z;

        SCREEN_DBG(r300_screen(screen), DBG_CBZB,
                   "CBZB Allowed: %s, Dim: %ix%i, Misalignment: %i, Micro: %s, Macro: %s\n",
                   surface->cbzb_allowed ? "YES" : " NO",
                   surface->cbzb_width, surface->cbzb_height,
                   offset & 2047,
                   tex->desc.microtile ? "YES" : " NO",
                   tex->desc.macrotile[level] ? "YES" : " NO");
    }

    return &surface->base;
}

/* XXX: Still implementing this as if it was a screen function, but
 * can now modify it to queue transfers on the context.
 */
static struct pipe_transfer *
svga_texture_get_transfer(struct pipe_context *pipe,
                          struct pipe_resource *texture,
                          unsigned level,
                          unsigned usage,
                          const struct pipe_box *box)
{
    struct svga_context *svga = svga_context(pipe);
    struct svga_screen *ss = svga_screen(pipe->screen);
    struct svga_winsys_screen *sws = ss->sws;
    struct svga_transfer *st;
    unsigned nblocksx = util_format_get_nblocksx(texture->format, box->width);
    unsigned nblocksy = util_format_get_nblocksy(texture->format, box->height);

    /* We can't map texture storage directly */
    if (usage & PIPE_TRANSFER_MAP_DIRECTLY)
        return NULL;

    assert(box->depth == 1);
    st = CALLOC_STRUCT(svga_transfer);
    if (!st)
        return NULL;

    pipe_resource_reference(&st->base.resource, texture);
    st->base.level = level;
    st->base.usage = usage;
    st->base.box = *box;
    st->base.stride = nblocksx*util_format_get_blocksize(texture->format);
    st->base.layer_stride = 0;

    st->hw_nblocksy = nblocksy;

    st->hwbuf = svga_winsys_buffer_create(svga,
                                          1,
                                          0,
                                          st->hw_nblocksy*st->base.stride);
    while(!st->hwbuf && (st->hw_nblocksy /= 2)) {
        st->hwbuf = svga_winsys_buffer_create(svga,
                                              1,
                                              0,
                                              st->hw_nblocksy*st->base.stride);
    }

    if(!st->hwbuf)
        goto no_hwbuf;

    if(st->hw_nblocksy < nblocksy) {
        /* We couldn't allocate a hardware buffer big enough for the transfer,
         * so allocate regular malloc memory instead */
        if (0) {
            debug_printf("%s: failed to allocate %u KB of DMA, "
                         "splitting into %u x %u KB DMA transfers\n",
                         __FUNCTION__,
                         (nblocksy*st->base.stride + 1023)/1024,
                         (nblocksy + st->hw_nblocksy - 1)/st->hw_nblocksy,
                         (st->hw_nblocksy*st->base.stride + 1023)/1024);
        }

        st->swbuf = MALLOC(nblocksy*st->base.stride);
        if(!st->swbuf)
            goto no_swbuf;
    }

    if (usage & PIPE_TRANSFER_READ) {
        SVGA3dSurfaceDMAFlags flags;
        memset(&flags, 0, sizeof flags);
        svga_transfer_dma(svga, st, SVGA3D_READ_HOST_VRAM, flags);
    }

    return &st->base;

no_swbuf:
    sws->buffer_destroy(sws, st->hwbuf);
no_hwbuf:
    FREE(st);
    return NULL;
}

/**
 * Called during state validation when LP_NEW_SAMPLER_VIEW is set.
 */
void
lp_setup_set_fragment_sampler_views(struct lp_setup_context *setup,
                                    unsigned num,
                                    struct pipe_sampler_view **views)
{
   unsigned i;

   LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);

   assert(num <= PIPE_MAX_SHADER_SAMPLER_VIEWS);

   for (i = 0; i < PIPE_MAX_SHADER_SAMPLER_VIEWS; i++) {
      struct pipe_sampler_view *view = i < num ? views[i] : NULL;

      if (view) {
         struct pipe_resource *res = view->texture;
         struct llvmpipe_resource *lp_tex = llvmpipe_resource(res);
         struct lp_jit_texture *jit_tex;
         jit_tex = &setup->fs.current.jit_context.textures[i];

         /* We're referencing the texture's internal data, so save a
          * reference to it.
          */
         pipe_resource_reference(&setup->fs.current_tex[i], res);

         if (!lp_tex->dt) {
            /* regular texture - setup array of mipmap level offsets */
            int j;
            unsigned first_level = 0;
            unsigned last_level = 0;

            if (llvmpipe_resource_is_texture(res)) {
               first_level = view->u.tex.first_level;
               last_level = view->u.tex.last_level;
               assert(first_level <= last_level);
               assert(last_level <= res->last_level);
               jit_tex->base = lp_tex->tex_data;
            }
            else {
              jit_tex->base = lp_tex->data;
            }

            if (LP_PERF & PERF_TEX_MEM) {
               /* use dummy tile memory */
               jit_tex->base = lp_dummy_tile;
               jit_tex->width = TILE_SIZE/8;
               jit_tex->height = TILE_SIZE/8;
               jit_tex->depth = 1;
               jit_tex->first_level = 0;
               jit_tex->last_level = 0;
               jit_tex->mip_offsets[0] = 0;
               jit_tex->row_stride[0] = 0;
               jit_tex->img_stride[0] = 0;
            }
            else {
               jit_tex->width = res->width0;
               jit_tex->height = res->height0;
               jit_tex->depth = res->depth0;
               jit_tex->first_level = first_level;
               jit_tex->last_level = last_level;

               if (llvmpipe_resource_is_texture(res)) {
                  for (j = first_level; j <= last_level; j++) {
                     jit_tex->mip_offsets[j] = lp_tex->mip_offsets[j];
                     jit_tex->row_stride[j] = lp_tex->row_stride[j];
                     jit_tex->img_stride[j] = lp_tex->img_stride[j];
                  }

                  if (res->target == PIPE_TEXTURE_1D_ARRAY ||
                      res->target == PIPE_TEXTURE_2D_ARRAY ||
                      res->target == PIPE_TEXTURE_CUBE ||
                      res->target == PIPE_TEXTURE_CUBE_ARRAY) {
                     /*
                      * For array textures, we don't have first_layer, instead
                      * adjust last_layer (stored as depth) plus the mip level offsets
                      * (as we have mip-first layout can't just adjust base ptr).
                      * XXX For mip levels, could do something similar.
                      */
                     jit_tex->depth = view->u.tex.last_layer - view->u.tex.first_layer + 1;
                     for (j = first_level; j <= last_level; j++) {
                        jit_tex->mip_offsets[j] += view->u.tex.first_layer *
                                                   lp_tex->img_stride[j];
                     }
                     if (view->target == PIPE_TEXTURE_CUBE ||
                         view->target == PIPE_TEXTURE_CUBE_ARRAY) {
                        assert(jit_tex->depth % 6 == 0);
                     }
                     assert(view->u.tex.first_layer <= view->u.tex.last_layer);
                     assert(view->u.tex.last_layer < res->array_size);
                  }
               }
               else {
                  /*
                   * For buffers, we don't have first_element, instead adjust
                   * last_element (stored as width) plus the base pointer.
                   */
                  unsigned view_blocksize = util_format_get_blocksize(view->format);
//.........这里部分代码省略.........

static void
svga_vbuf_render_draw_elements( struct vbuf_render *render,
                                const ushort *indices,
                                uint nr_indices)
{
   struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
   struct svga_context *svga = svga_render->svga;
   struct pipe_screen *screen = svga->pipe.screen;
   int bias = (svga_render->vbuf_offset - svga_render->vdecl_offset) / svga_render->vertex_size;
   boolean ret;
   size_t size = 2 * nr_indices;

   assert(( svga_render->vbuf_offset - svga_render->vdecl_offset) % svga_render->vertex_size == 0);
   
   if (svga_render->ibuf_size < svga_render->ibuf_offset + size)
      pipe_resource_reference(&svga_render->ibuf, NULL);

   if (!svga_render->ibuf) {
      svga_render->ibuf_size = MAX2(size, svga_render->ibuf_alloc_size);
      svga_render->ibuf = pipe_buffer_create(screen,
                                             PIPE_BIND_INDEX_BUFFER,
                                             PIPE_USAGE_STREAM,
                                             svga_render->ibuf_size);
      svga_render->ibuf_offset = 0;
   }

   pipe_buffer_write_nooverlap(&svga->pipe, svga_render->ibuf,
			       svga_render->ibuf_offset, 2 * nr_indices, indices);

   /* off to hardware */
   svga_vbuf_submit_state(svga_render);

   /* Need to call update_state() again as the draw module may have
    * altered some of our state behind our backs.  Testcase:
    * redbook/polys.c
    */
   svga_update_state_retry( svga, SVGA_STATE_HW_DRAW );

   ret = svga_hwtnl_draw_range_elements(svga->hwtnl,
                                        svga_render->ibuf,
                                        2,
                                        bias,
                                        svga_render->min_index,
                                        svga_render->max_index,
                                        svga_render->prim,
                                        svga_render->ibuf_offset / 2, nr_indices);
   if(ret != PIPE_OK) {
      svga_context_flush(svga, NULL);
      ret = svga_hwtnl_draw_range_elements(svga->hwtnl,
                                           svga_render->ibuf,
                                           2,
                                           bias,
                                           svga_render->min_index,
                                           svga_render->max_index,
                                           svga_render->prim,
                                           svga_render->ibuf_offset / 2, nr_indices);
      svga->swtnl.new_vbuf = TRUE;
      assert(ret == PIPE_OK);
   }

   svga_render->ibuf_offset += size;
}

static void r300_draw_elements(struct r300_context *r300,
                               const struct pipe_draw_info *info,
                               int instance_id)
{
    struct pipe_resource *indexBuffer = r300->index_buffer.buffer;
    unsigned indexSize = r300->index_buffer.index_size;
    struct pipe_resource* orgIndexBuffer = indexBuffer;
    unsigned start = info->start;
    unsigned count = info->count;
    boolean alt_num_verts = r300->screen->caps.is_r500 &&
                            count > 65536;
    unsigned short_count;
    int buffer_offset = 0, index_offset = 0; /* for index bias emulation */
    uint16_t indices3[3];

    if (info->index_bias && !r300->screen->caps.is_r500) {
        r300_split_index_bias(r300, info->index_bias, &buffer_offset,
                              &index_offset);
    }

    r300_translate_index_buffer(r300, &r300->index_buffer, &indexBuffer,
                                &indexSize, index_offset, &start, count);

    /* Fallback for misaligned ushort indices. */
    if (indexSize == 2 && (start & 1) && indexBuffer) {
        /* If we got here, then orgIndexBuffer == indexBuffer. */
        uint16_t *ptr = r300->rws->buffer_map(r300_resource(orgIndexBuffer)->cs_buf,
                                              r300->cs,
                                              PIPE_TRANSFER_READ |
                                              PIPE_TRANSFER_UNSYNCHRONIZED);

        if (info->mode == PIPE_PRIM_TRIANGLES) {
           memcpy(indices3, ptr + start, 6);
        } else {
            /* Copy the mapped index buffer directly to the upload buffer.
             * The start index will be aligned simply from the fact that
             * every sub-buffer in the upload buffer is aligned. */
            r300_upload_index_buffer(r300, &indexBuffer, indexSize, &start,
                                     count, (uint8_t*)ptr);
        }
    } else {
        if (r300->index_buffer.user_buffer)
            r300_upload_index_buffer(r300, &indexBuffer, indexSize,
                                     &start, count,
                                     r300->index_buffer.user_buffer);
    }

    /* 19 dwords for emit_draw_elements. Give up if the function fails. */
    if (!r300_prepare_for_rendering(r300,
            PREP_EMIT_STATES | PREP_VALIDATE_VBOS | PREP_EMIT_VARRAYS |
            PREP_INDEXED, indexBuffer, 19, buffer_offset, info->index_bias,
            instance_id))
        goto done;

    if (alt_num_verts || count <= 65535) {
        r300_emit_draw_elements(r300, indexBuffer, indexSize,
                                info->max_index, info->mode, start, count,
                                indices3);
    } else {
        do {
            /* The maximum must be divisible by 4 and 3,
             * so that quad and triangle lists are split correctly.
             *
             * Strips, loops, and fans won't work. */
            short_count = MIN2(count, 65532);

            r300_emit_draw_elements(r300, indexBuffer, indexSize,
                                     info->max_index,
                                     info->mode, start, short_count, indices3);

            start += short_count;
            count -= short_count;

            /* 15 dwords for emit_draw_elements */
            if (count) {
                if (!r300_prepare_for_rendering(r300,
                        PREP_VALIDATE_VBOS | PREP_EMIT_VARRAYS | PREP_INDEXED,
                        indexBuffer, 19, buffer_offset, info->index_bias,
                        instance_id))
                    goto done;
            }
        } while (count);
    }

done:
    if (indexBuffer != orgIndexBuffer) {
        pipe_resource_reference( &indexBuffer, NULL );
    }
}

VAStatus
vlVaDeriveImage(VADriverContextP ctx, VASurfaceID surface, VAImage *image)
{
   vlVaDriver *drv;
   vlVaSurface *surf;
   vlVaBuffer *img_buf;
   VAImage *img;
   struct pipe_surface **surfaces;
   int w;
   int h;
   int i;

   if (!ctx)
      return VA_STATUS_ERROR_INVALID_CONTEXT;

   drv = VL_VA_DRIVER(ctx);

   if (!drv)
      return VA_STATUS_ERROR_INVALID_CONTEXT;

   surf = handle_table_get(drv->htab, surface);

   if (!surf || !surf->buffer || surf->buffer->interlaced)
      return VA_STATUS_ERROR_INVALID_SURFACE;

   surfaces = surf->buffer->get_surfaces(surf->buffer);
   if (!surfaces || !surfaces[0]->texture)
      return VA_STATUS_ERROR_ALLOCATION_FAILED;

   img = CALLOC(1, sizeof(VAImage));
   if (!img)
      return VA_STATUS_ERROR_ALLOCATION_FAILED;

   img->format.fourcc = PipeFormatToVaFourcc(surf->buffer->buffer_format);
   img->buf = VA_INVALID_ID;
   img->width = surf->buffer->width;
   img->height = surf->buffer->height;
   img->num_palette_entries = 0;
   img->entry_bytes = 0;
   w = align(surf->buffer->width, 2);
   h = align(surf->buffer->height, 2);

   for (i = 0; i < ARRAY_SIZE(formats); ++i) {
      if (img->format.fourcc == formats[i].fourcc) {
         img->format = formats[i];
         break;
      }
   }

   switch (img->format.fourcc) {
   case VA_FOURCC('U','Y','V','Y'):
   case VA_FOURCC('Y','U','Y','V'):
      img->num_planes = 1;
      img->pitches[0] = w * 2;
      img->offsets[0] = 0;
      img->data_size  = w * h * 2;
      break;

   case VA_FOURCC('B','G','R','A'):
   case VA_FOURCC('R','G','B','A'):
   case VA_FOURCC('B','G','R','X'):
   case VA_FOURCC('R','G','B','X'):
      img->num_planes = 1;
      img->pitches[0] = w * 4;
      img->offsets[0] = 0;
      img->data_size  = w * h * 4;
      break;

   default:
      /* VaDeriveImage is designed for contiguous planes. */
      FREE(img);
      return VA_STATUS_ERROR_INVALID_IMAGE_FORMAT;
   }

   img_buf = CALLOC(1, sizeof(vlVaBuffer));
   if (!img_buf) {
      FREE(img);
      return VA_STATUS_ERROR_ALLOCATION_FAILED;
   }

   pipe_mutex_lock(drv->mutex);
   img->image_id = handle_table_add(drv->htab, img);

   img_buf->type = VAImageBufferType;
   img_buf->size = img->data_size;
   img_buf->num_elements = 1;

   pipe_resource_reference(&img_buf->derived_surface.resource, surfaces[0]->texture);

   img->buf = handle_table_add(VL_VA_DRIVER(ctx)->htab, img_buf);
   pipe_mutex_unlock(drv->mutex);

   *image = *img;

   return VA_STATUS_SUCCESS;
}

/**
 * Free all the temporary data in a scene.
 */
void
lp_scene_end_rasterization(struct lp_scene *scene )
{
   int i, j;

   /* Unmap color buffers */
   for (i = 0; i < scene->fb.nr_cbufs; i++) {
      if (scene->cbufs[i].map) {
         struct pipe_surface *cbuf = scene->fb.cbufs[i];
         if (llvmpipe_resource_is_texture(cbuf->texture)) {
            llvmpipe_resource_unmap(cbuf->texture,
                                    cbuf->u.tex.level,
                                    cbuf->u.tex.first_layer);
         }
         scene->cbufs[i].map = NULL;
      }
   }

   /* Unmap z/stencil buffer */
   if (scene->zsbuf.map) {
      struct pipe_surface *zsbuf = scene->fb.zsbuf;
      llvmpipe_resource_unmap(zsbuf->texture,
                              zsbuf->u.tex.level,
                              zsbuf->u.tex.first_layer);
      scene->zsbuf.map = NULL;
   }

   /* Reset all command lists:
    */
   for (i = 0; i < scene->tiles_x; i++) {
      for (j = 0; j < scene->tiles_y; j++) {
         struct cmd_bin *bin = lp_scene_get_bin(scene, i, j);
         bin->head = NULL;
         bin->tail = NULL;
         bin->last_state = NULL;
      }
   }

   /* If there are any bins which weren't cleared by the loop above,
    * they will be caught (on debug builds at least) by this assert:
    */
   assert(lp_scene_is_empty(scene));

   /* Decrement texture ref counts
    */
   {
      struct resource_ref *ref;
      int i, j = 0;

      for (ref = scene->resources; ref; ref = ref->next) {
         for (i = 0; i < ref->count; i++) {
            if (LP_DEBUG & DEBUG_SETUP)
               debug_printf("resource %d: %p %dx%d sz %d\n",
                            j,
                            (void *) ref->resource[i],
                            ref->resource[i]->width0,
                            ref->resource[i]->height0,
                            llvmpipe_resource_size(ref->resource[i]));
            j++;
            pipe_resource_reference(&ref->resource[i], NULL);
         }
      }

      if (LP_DEBUG & DEBUG_SETUP)
         debug_printf("scene %d resources, sz %d\n",
                      j, scene->resource_reference_size);
   }

   /* Free all scene data blocks:
    */
   {
      struct data_block_list *list = &scene->data;
      struct data_block *block, *tmp;

      for (block = list->head->next; block; block = tmp) {
         tmp = block->next;
	 FREE(block);
      }

      list->head->next = NULL;
      list->head->used = 0;
   }

   lp_fence_reference(&scene->fence, NULL);

   scene->resources = NULL;
   scene->scene_size = 0;
   scene->resource_reference_size = 0;

   scene->has_depthstencil_clear = FALSE;
   scene->alloc_failed = FALSE;

   util_unreference_framebuffer_state( &scene->fb );
}

static void noop_surface_destroy(struct pipe_context *ctx,
				 struct pipe_surface *surface)
{
	pipe_resource_reference(&surface->texture, NULL);
	FREE(surface);
}

static void noop_stream_output_target_destroy(struct pipe_context *ctx,
                                      struct pipe_stream_output_target *t)
{
   pipe_resource_reference(&t->buffer, NULL);
   FREE(t);
}

static void noop_sampler_view_destroy(struct pipe_context *ctx,
				struct pipe_sampler_view *state)
{
	pipe_resource_reference(&state->texture, NULL);
	FREE(state);
}

static void
dri2_destroy_image(__DRIimage *img)
{
   pipe_resource_reference(&img->texture, NULL);
   FREE(img);
}

/**
 * Process __DRIbuffer and convert them into pipe_resources.
 */
static void
dri2_drawable_process_buffers(struct dri_drawable *drawable,
                              __DRIbuffer *buffers, unsigned count)
{
   struct dri_screen *screen = dri_screen(drawable->sPriv);
   __DRIdrawable *dri_drawable = drawable->dPriv;
   struct pipe_resource templ;
   struct winsys_handle whandle;
   boolean have_depth = FALSE;
   unsigned i, bind;

   if (drawable->old_num == count &&
       drawable->old_w == dri_drawable->w &&
       drawable->old_h == dri_drawable->h &&
       memcmp(drawable->old, buffers, sizeof(__DRIbuffer) * count) == 0)
      return;

   for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
      pipe_resource_reference(&drawable->textures[i], NULL);

   memset(&templ, 0, sizeof(templ));
   templ.target = screen->target;
   templ.last_level = 0;
   templ.width0 = dri_drawable->w;
   templ.height0 = dri_drawable->h;
   templ.depth0 = 1;
   templ.array_size = 1;

   memset(&whandle, 0, sizeof(whandle));

   for (i = 0; i < count; i++) {
      __DRIbuffer *buf = &buffers[i];
      enum st_attachment_type statt;
      enum pipe_format format;

      switch (buf->attachment) {
      case __DRI_BUFFER_FRONT_LEFT:
         if (!screen->auto_fake_front) {
            statt = ST_ATTACHMENT_INVALID;
            break;
         }
         /* fallthrough */
      case __DRI_BUFFER_FAKE_FRONT_LEFT:
         statt = ST_ATTACHMENT_FRONT_LEFT;
         break;
      case __DRI_BUFFER_BACK_LEFT:
         statt = ST_ATTACHMENT_BACK_LEFT;
         break;
      case __DRI_BUFFER_DEPTH:
      case __DRI_BUFFER_DEPTH_STENCIL:
      case __DRI_BUFFER_STENCIL:
         /* use only the first depth/stencil buffer */
         if (!have_depth) {
            have_depth = TRUE;
            statt = ST_ATTACHMENT_DEPTH_STENCIL;
         }
         else {
            statt = ST_ATTACHMENT_INVALID;
         }
         break;
      default:
         statt = ST_ATTACHMENT_INVALID;
         break;
      }

      dri_drawable_get_format(drawable, statt, &format, &bind);
      if (statt == ST_ATTACHMENT_INVALID || format == PIPE_FORMAT_NONE)
         continue;

      templ.format = format;
      templ.bind = bind;
      whandle.handle = buf->name;
      whandle.stride = buf->pitch;

      drawable->textures[statt] =
         screen->base.screen->resource_from_handle(screen->base.screen,
               &templ, &whandle);
   }

   drawable->old_num = count;
   drawable->old_w = dri_drawable->w;
   drawable->old_h = dri_drawable->h;
   memcpy(drawable->old, buffers, sizeof(__DRIbuffer) * count);
}

void r600_draw_rectangle(struct blitter_context *blitter,
			 int x1, int y1, int x2, int y2, float depth,
			 enum blitter_attrib_type type,
			 const union pipe_color_union *attrib)
{
	struct r600_common_context *rctx =
		(struct r600_common_context*)util_blitter_get_pipe(blitter);
	struct pipe_viewport_state viewport;
	struct pipe_resource *buf = NULL;
	unsigned offset = 0;
	float *vb;

	if (type == UTIL_BLITTER_ATTRIB_TEXCOORD) {
		util_blitter_draw_rectangle(blitter, x1, y1, x2, y2, depth, type, attrib);
		return;
	}

	/* Some operations (like color resolve on r6xx) don't work
	 * with the conventional primitive types.
	 * One that works is PT_RECTLIST, which we use here. */

	/* setup viewport */
	viewport.scale[0] = 1.0f;
	viewport.scale[1] = 1.0f;
	viewport.scale[2] = 1.0f;
	viewport.translate[0] = 0.0f;
	viewport.translate[1] = 0.0f;
	viewport.translate[2] = 0.0f;
	rctx->b.set_viewport_states(&rctx->b, 0, 1, &viewport);

	/* Upload vertices. The hw rectangle has only 3 vertices,
	 * I guess the 4th one is derived from the first 3.
	 * The vertex specification should match u_blitter's vertex element state. */
	u_upload_alloc(rctx->uploader, 0, sizeof(float) * 24, 256, &offset, &buf, (void**)&vb);
	if (!buf)
		return;

	vb[0] = x1;
	vb[1] = y1;
	vb[2] = depth;
	vb[3] = 1;

	vb[8] = x1;
	vb[9] = y2;
	vb[10] = depth;
	vb[11] = 1;

	vb[16] = x2;
	vb[17] = y1;
	vb[18] = depth;
	vb[19] = 1;

	if (attrib) {
		memcpy(vb+4, attrib->f, sizeof(float)*4);
		memcpy(vb+12, attrib->f, sizeof(float)*4);
		memcpy(vb+20, attrib->f, sizeof(float)*4);
	}

	/* draw */
	util_draw_vertex_buffer(&rctx->b, NULL, buf, blitter->vb_slot, offset,
				R600_PRIM_RECTANGLE_LIST, 3, 2);
	pipe_resource_reference(&buf, NULL);
}

static void r600_tex_surface_destroy(struct pipe_surface *surface)
{
	pipe_resource_reference(&surface->texture, NULL);
	FREE(surface);
}

PUBLIC
Status XvMCCreateSubpicture(Display *dpy, XvMCContext *context, XvMCSubpicture *subpicture,
                            unsigned short width, unsigned short height, int xvimage_id)
{
   XvMCContextPrivate *context_priv;
   XvMCSubpicturePrivate *subpicture_priv;
   struct pipe_context *pipe;
   struct pipe_resource tex_templ, *tex;
   struct pipe_sampler_view sampler_templ;
   Status ret;

   XVMC_MSG(XVMC_TRACE, "[XvMC] Creating subpicture %p.\n", subpicture);

   assert(dpy);

   if (!context)
      return XvMCBadContext;

   context_priv = context->privData;
   pipe = context_priv->pipe;

   if (!subpicture)
      return XvMCBadSubpicture;

   if (width > context_priv->subpicture_max_width ||
       height > context_priv->subpicture_max_height)
      return BadValue;

   ret = Validate(dpy, context->port, context->surface_type_id, xvimage_id);
   if (ret != Success)
      return ret;

   subpicture_priv = CALLOC(1, sizeof(XvMCSubpicturePrivate));
   if (!subpicture_priv)
      return BadAlloc;

   memset(&tex_templ, 0, sizeof(tex_templ));
   tex_templ.target = PIPE_TEXTURE_2D;
   tex_templ.format = XvIDToPipe(xvimage_id);
   tex_templ.last_level = 0;
   if (pipe->screen->get_video_param(pipe->screen,
                                     PIPE_VIDEO_PROFILE_UNKNOWN,
                                     PIPE_VIDEO_ENTRYPOINT_UNKNOWN,
                                     PIPE_VIDEO_CAP_NPOT_TEXTURES)) {
      tex_templ.width0 = width;
      tex_templ.height0 = height;
   }
   else {
      tex_templ.width0 = util_next_power_of_two(width);
      tex_templ.height0 = util_next_power_of_two(height);
   }
   tex_templ.depth0 = 1;
   tex_templ.array_size = 1;
   tex_templ.usage = PIPE_USAGE_DYNAMIC;
   tex_templ.bind = PIPE_BIND_SAMPLER_VIEW;
   tex_templ.flags = 0;

   tex = pipe->screen->resource_create(pipe->screen, &tex_templ);

   memset(&sampler_templ, 0, sizeof(sampler_templ));
   u_sampler_view_default_template(&sampler_templ, tex, tex->format);

   subpicture_priv->sampler = pipe->create_sampler_view(pipe, tex, &sampler_templ);
   pipe_resource_reference(&tex, NULL);
   if (!subpicture_priv->sampler) {
      FREE(subpicture_priv);
      return BadAlloc;
   }

   subpicture_priv->context = context;
   subpicture->subpicture_id = XAllocID(dpy);
   subpicture->context_id = context->context_id;
   subpicture->xvimage_id = xvimage_id;
   subpicture->width = width;
   subpicture->height = height;
   subpicture->num_palette_entries = NumPaletteEntries4XvID(xvimage_id);
   subpicture->entry_bytes = PipeToComponentOrder(tex_templ.format, subpicture->component_order);
   subpicture->privData = subpicture_priv;

   if (subpicture->num_palette_entries > 0) {
      tex_templ.target = PIPE_TEXTURE_1D;
      tex_templ.format = PIPE_FORMAT_R8G8B8X8_UNORM;
      tex_templ.width0 = subpicture->num_palette_entries;
      tex_templ.height0 = 1;
      tex_templ.usage = PIPE_USAGE_DEFAULT;

      tex = pipe->screen->resource_create(pipe->screen, &tex_templ);

      memset(&sampler_templ, 0, sizeof(sampler_templ));
      u_sampler_view_default_template(&sampler_templ, tex, tex->format);
      sampler_templ.swizzle_a = PIPE_SWIZZLE_ONE;
      subpicture_priv->palette = pipe->create_sampler_view(pipe, tex, &sampler_templ);
      pipe_resource_reference(&tex, NULL);
      if (!subpicture_priv->sampler) {
         FREE(subpicture_priv);
         return BadAlloc;
      }
   }

   SyncHandle();
//.........这里部分代码省略.........

/**
 * Called during state validation when LP_NEW_SAMPLER_VIEW is set.
 */
void
lp_setup_set_fragment_sampler_views(struct lp_setup_context *setup,
                                    unsigned num,
                                    struct pipe_sampler_view **views)
{
   unsigned i;

   LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);

   assert(num <= PIPE_MAX_SAMPLERS);

   for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
      struct pipe_sampler_view *view = i < num ? views[i] : NULL;

      if (view) {
         struct pipe_resource *tex = view->texture;
         struct llvmpipe_resource *lp_tex = llvmpipe_resource(tex);
         struct lp_jit_texture *jit_tex;
         jit_tex = &setup->fs.current.jit_context.textures[i];
         jit_tex->width = tex->width0;
         jit_tex->height = tex->height0;
         jit_tex->depth = tex->depth0;
         jit_tex->first_level = view->u.tex.first_level;
         jit_tex->last_level = tex->last_level;

         /* We're referencing the texture's internal data, so save a
          * reference to it.
          */
         pipe_resource_reference(&setup->fs.current_tex[i], te