C++ draw_flush函数代码示例

/**
 * Draw vertex arrays, with optional indexing, optional instancing.
 * All the other drawing functions are implemented in terms of this function.
 * Basically, map the vertex buffers (and drawing surfaces), then hand off
 * the drawing to the 'draw' module.
 */
static void
llvmpipe_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
{
   struct llvmpipe_context *lp = llvmpipe_context(pipe);
   struct draw_context *draw = lp->draw;
   const void *mapped_indices = NULL;
   unsigned i;

   if (!llvmpipe_check_render_cond(lp))
      return;

   if (lp->dirty)
      llvmpipe_update_derived( lp );

   /*
    * Map vertex buffers
    */
   for (i = 0; i < lp->num_vertex_buffers; i++) {
      const void *buf = lp->vertex_buffer[i].user_buffer;
      if (!buf)
         buf = llvmpipe_resource_data(lp->vertex_buffer[i].buffer);
      draw_set_mapped_vertex_buffer(draw, i, buf);
   }

   /* Map index buffer, if present */
   if (info->indexed) {
      mapped_indices = lp->index_buffer.user_buffer;
      if (!mapped_indices)
         mapped_indices = llvmpipe_resource_data(lp->index_buffer.buffer);

      draw_set_indexes(draw,
                       (ubyte *) mapped_indices + lp->index_buffer.offset,
                       lp->index_buffer.index_size);
   }

   llvmpipe_prepare_vertex_sampling(lp,
                                    lp->num_sampler_views[PIPE_SHADER_VERTEX],
                                    lp->sampler_views[PIPE_SHADER_VERTEX]);

   /* draw! */
   draw_vbo(draw, info);

   /*
    * unmap vertex/index buffers
    */
   for (i = 0; i < lp->num_vertex_buffers; i++) {
      draw_set_mapped_vertex_buffer(draw, i, NULL);
   }
   if (mapped_indices) {
      draw_set_indexes(draw, NULL, 0);
   }
   llvmpipe_cleanup_vertex_sampling(lp);

   /*
    * TODO: Flush only when a user vertex/index buffer is present
    * (or even better, modify draw module to do this
    * internally when this condition is seen?)
    */
   draw_flush(draw);
}

void
nvfx_draw_vbo_swtnl(struct pipe_context *pipe, const struct pipe_draw_info* info)
{
	struct nvfx_context *nvfx = nvfx_context(pipe);
	unsigned i;
	void *map;

	if (!nvfx_state_validate_swtnl(nvfx))
		return;

	nvfx_state_emit(nvfx);

	/* these must be passed without adding the offsets */
	for (i = 0; i < nvfx->vtxbuf_nr; i++) {
		map = nvfx_buffer(nvfx->vtxbuf[i].buffer)->data;
		draw_set_mapped_vertex_buffer(nvfx->draw, i, map);
	}

	map = NULL;
	if (info->indexed && nvfx->idxbuf.buffer)
		map = nvfx_buffer(nvfx->idxbuf.buffer)->data;
	draw_set_mapped_index_buffer(nvfx->draw, map);

	if (nvfx->constbuf[PIPE_SHADER_VERTEX]) {
		const unsigned nr = nvfx->constbuf_nr[PIPE_SHADER_VERTEX];

		map = nvfx_buffer(nvfx->constbuf[PIPE_SHADER_VERTEX])->data;
		draw_set_mapped_constant_buffer(nvfx->draw, PIPE_SHADER_VERTEX, 0,
                                                map, nr);
	}

	draw_vbo(nvfx->draw, info);

	draw_flush(nvfx->draw);
}

static void
llvmpipe_set_constant_buffer(struct pipe_context *pipe,
                             uint shader, uint index,
                             struct pipe_resource *constants)
{
   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
   unsigned size = constants ? constants->width0 : 0;
   const void *data = constants ? llvmpipe_resource_data(constants) : NULL;

   assert(shader < PIPE_SHADER_TYPES);
   assert(index < PIPE_MAX_CONSTANT_BUFFERS);

   if(llvmpipe->constants[shader][index] == constants)
      return;

   draw_flush(llvmpipe->draw);

   /* note: reference counting */
   pipe_resource_reference(&llvmpipe->constants[shader][index], constants);

   if(shader == PIPE_SHADER_VERTEX ||
      shader == PIPE_SHADER_GEOMETRY) {
      draw_set_mapped_constant_buffer(llvmpipe->draw, shader,
                                      index, data, size);
   }

   llvmpipe->dirty |= LP_NEW_CONSTANTS;
}

static void i915_set_sampler_textures(struct pipe_context *pipe,
                                      unsigned num,
                                      struct pipe_texture **texture)
{
   struct i915_context *i915 = i915_context(pipe);
   uint i;

   assert(num <= PIPE_MAX_SAMPLERS);

   /* Check for no-op */
   if (num == i915->num_textures &&
       !memcmp(i915->texture, texture, num * sizeof(struct pipe_texture *)))
      return;

   /* Fixes wrong texture in texobj with VBUF */
   draw_flush(i915->draw);

   for (i = 0; i < num; i++)
      pipe_texture_reference((struct pipe_texture **) &i915->texture[i],
                             texture[i]);

   for (i = num; i < i915->num_textures; i++)
      pipe_texture_reference((struct pipe_texture **) &i915->texture[i],
                             NULL);

   i915->num_textures = num;

   i915->dirty |= I915_NEW_TEXTURE;
}

static void i915_set_fragment_sampler_views(struct pipe_context *pipe,
                                            unsigned num,
                                            struct pipe_sampler_view **views)
{
   struct i915_context *i915 = i915_context(pipe);
   uint i;

   assert(num <= PIPE_MAX_SAMPLERS);

   /* Check for no-op */
   if (num == i915->num_fragment_sampler_views &&
       !memcmp(i915->fragment_sampler_views, views, num * sizeof(struct pipe_sampler_view *)))
      return;

   /* Fixes wrong texture in texobj with VBUF */
   draw_flush(i915->draw);

   for (i = 0; i < num; i++)
      pipe_sampler_view_reference(&i915->fragment_sampler_views[i],
                                  views[i]);

   for (i = num; i < i915->num_fragment_sampler_views; i++)
      pipe_sampler_view_reference(&i915->fragment_sampler_views[i],
                                  NULL);

   i915->num_fragment_sampler_views = num;

   i915->dirty |= I915_NEW_SAMPLER_VIEW;
}

void
llvmpipe_set_vertex_sampler_textures(struct pipe_context *pipe,
                                     unsigned num_textures,
                                     struct pipe_texture **textures)
{
   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
   uint i;

   assert(num_textures <= PIPE_MAX_VERTEX_SAMPLERS);

   /* Check for no-op */
   if (num_textures == llvmpipe->num_vertex_textures &&
       !memcmp(llvmpipe->vertex_textures, textures, num_textures * sizeof(struct pipe_texture *))) {
      return;
   }

   draw_flush(llvmpipe->draw);

   for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
      struct pipe_texture *tex = i < num_textures ? textures[i] : NULL;

      pipe_texture_reference(&llvmpipe->vertex_textures[i], tex);
   }

   llvmpipe->num_vertex_textures = num_textures;

   llvmpipe->dirty |= LP_NEW_TEXTURE;
}

void
llvmpipe_set_constant_buffer(struct pipe_context *pipe,
                             uint shader, uint index,
                             struct pipe_buffer *constants)
{
   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
   unsigned size = constants ? constants->size : 0;
   const void *data = constants ? llvmpipe_buffer(constants)->data : NULL;

   assert(shader < PIPE_SHADER_TYPES);
   assert(index == 0);

   if(llvmpipe->constants[shader] == constants)
      return;

   draw_flush(llvmpipe->draw);

   /* note: reference counting */
   pipe_buffer_reference(&llvmpipe->constants[shader], constants);

   if(shader == PIPE_SHADER_VERTEX) {
      draw_set_mapped_constant_buffer(llvmpipe->draw, PIPE_SHADER_VERTEX, 0,
                                      data, size);
   }

   llvmpipe->dirty |= LP_NEW_CONSTANTS;
}

void
softpipe_set_sampler_textures(struct pipe_context *pipe,
                              unsigned num, struct pipe_texture **texture)
{
   struct softpipe_context *softpipe = softpipe_context(pipe);
   uint i;

   assert(num <= PIPE_MAX_SAMPLERS);

   /* Check for no-op */
   if (num == softpipe->num_textures &&
       !memcmp(softpipe->texture, texture, num * sizeof(struct pipe_texture *)))
      return;

   draw_flush(softpipe->draw);

   for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
      struct pipe_texture *tex = i < num ? texture[i] : NULL;

      pipe_texture_reference(&softpipe->texture[i], tex);
      sp_tex_tile_cache_set_texture(softpipe->tex_cache[i], tex);
   }

   softpipe->num_textures = num;

   softpipe->dirty |= SP_NEW_TEXTURE;
}

void
softpipe_bind_sampler_states(struct pipe_context *pipe,
                             unsigned num, void **sampler)
{
   struct softpipe_context *softpipe = softpipe_context(pipe);
   unsigned i;

   assert(num <= PIPE_MAX_SAMPLERS);

   /* Check for no-op */
   if (num == softpipe->num_samplers &&
       !memcmp(softpipe->sampler, sampler, num * sizeof(void *)))
      return;

   draw_flush(softpipe->draw);

   for (i = 0; i < num; ++i)
      softpipe->sampler[i] = sampler[i];
   for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
      softpipe->sampler[i] = NULL;

   softpipe->num_samplers = num;

   softpipe->dirty |= SP_NEW_SAMPLER;
}

static void
llvmpipe_set_vertex_sampler_views(struct pipe_context *pipe,
                                  unsigned num,
                                  struct pipe_sampler_view **views)
{
   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
   uint i;

   assert(num <= PIPE_MAX_VERTEX_SAMPLERS);

   /* Check for no-op */
   if (num == llvmpipe->num_vertex_sampler_views &&
       !memcmp(llvmpipe->vertex_sampler_views, views, num * sizeof(struct pipe_sampler_view *))) {
      return;
   }

   draw_flush(llvmpipe->draw);

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

      pipe_sampler_view_reference(&llvmpipe->vertex_sampler_views[i], view);
   }

   llvmpipe->num_vertex_sampler_views = num;

   draw_set_sampler_views(llvmpipe->draw,
                          llvmpipe->vertex_sampler_views,
                          llvmpipe->num_vertex_sampler_views);

   llvmpipe->dirty |= LP_NEW_SAMPLER_VIEW;
}

void
llvmpipe_bind_vertex_sampler_states(struct pipe_context *pipe,
                                    unsigned num_samplers,
                                    void **samplers)
{
   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
   unsigned i;

   assert(num_samplers <= PIPE_MAX_VERTEX_SAMPLERS);

   /* Check for no-op */
   if (num_samplers == llvmpipe->num_vertex_samplers &&
       !memcmp(llvmpipe->vertex_samplers, samplers, num_samplers * sizeof(void *)))
      return;

   draw_flush(llvmpipe->draw);

   for (i = 0; i < num_samplers; ++i)
      llvmpipe->vertex_samplers[i] = samplers[i];
   for (i = num_samplers; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
      llvmpipe->vertex_samplers[i] = NULL;

   llvmpipe->num_vertex_samplers = num_samplers;

   llvmpipe->dirty |= LP_NEW_SAMPLER;
}

/**
 * \param fence  if non-null, returns pointer to a fence which can be waited on
 */
void
llvmpipe_flush( struct pipe_context *pipe,
                struct pipe_fence_handle **fence,
                const char *reason)
{
   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);

   draw_flush(llvmpipe->draw);

   /* ask the setup module to flush */
   lp_setup_flush(llvmpipe->setup, fence, reason);

   /* Enable to dump BMPs of the color/depth buffers each frame */
   if (0) {
      static unsigned frame_no = 1;
      char filename[256];
      unsigned i;

      for (i = 0; i < llvmpipe->framebuffer.nr_cbufs; i++) {
         util_snprintf(filename, sizeof(filename), "cbuf%u_%u", i, frame_no);
         debug_dump_surface_bmp(&llvmpipe->pipe, filename, llvmpipe->framebuffer.cbufs[i]);
      }

      if (0) {
         util_snprintf(filename, sizeof(filename), "zsbuf_%u", frame_no);
         debug_dump_surface_bmp(&llvmpipe->pipe, filename, llvmpipe->framebuffer.zsbuf);
      }

      ++frame_no;
   }
}

void
llvmpipe_set_constant_buffer(struct pipe_context *pipe,
                             uint shader, uint index,
                             const struct pipe_constant_buffer *constants)
{
   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
   struct pipe_buffer *buffer = constants ? constants->buffer : NULL;
   unsigned size = buffer ? buffer->size : 0;
   const void *data = buffer ? llvmpipe_buffer(buffer)->data : NULL;

   assert(shader < PIPE_SHADER_TYPES);
   assert(index == 0);

   if(shader == PIPE_SHADER_VERTEX)
      draw_flush(llvmpipe->draw);

   /* note: reference counting */
   pipe_buffer_reference(&llvmpipe->constants[shader].buffer, buffer);

   if(shader == PIPE_SHADER_FRAGMENT) {
      llvmpipe->jit_context.constants = data;
   }

   if(shader == PIPE_SHADER_VERTEX) {
      draw_set_mapped_constant_buffer(llvmpipe->draw, data, size);
   }

   llvmpipe->dirty |= LP_NEW_CONSTANTS;
}

/* SW TCL elements, using Draw. */
static void r300_swtcl_draw_vbo(struct pipe_context* pipe,
                                const struct pipe_draw_info *info)
{
    struct r300_context* r300 = r300_context(pipe);
    struct pipe_transfer *vb_transfer[PIPE_MAX_ATTRIBS];
    struct pipe_transfer *ib_transfer = NULL;
    int i;
    void *indices = NULL;
    boolean indexed = info->indexed && r300->vbuf_mgr->index_buffer.buffer;

    if (r300->skip_rendering) {
        return;
    }

    r300_update_derived_state(r300);

    r300_reserve_cs_dwords(r300,
            PREP_EMIT_STATES | PREP_EMIT_VARRAYS_SWTCL |
            (indexed ? PREP_INDEXED : 0),
            indexed ? 256 : 6);

    for (i = 0; i < r300->vbuf_mgr->nr_vertex_buffers; i++) {
        if (r300->vbuf_mgr->vertex_buffer[i].buffer) {
            void *buf = pipe_buffer_map(pipe,
                                  r300->vbuf_mgr->vertex_buffer[i].buffer,
                                  PIPE_TRANSFER_READ |
                                  PIPE_TRANSFER_UNSYNCHRONIZED,
                                  &vb_transfer[i]);
            draw_set_mapped_vertex_buffer(r300->draw, i, buf);
        }
    }

    if (indexed) {
        indices = pipe_buffer_map(pipe, r300->vbuf_mgr->index_buffer.buffer,
                                  PIPE_TRANSFER_READ |
                                  PIPE_TRANSFER_UNSYNCHRONIZED, &ib_transfer);
    }

    draw_set_mapped_index_buffer(r300->draw, indices);

    r300->draw_vbo_locked = TRUE;
    r300->draw_first_emitted = FALSE;
    draw_vbo(r300->draw, info);
    draw_flush(r300->draw);
    r300->draw_vbo_locked = FALSE;

    for (i = 0; i < r300->vbuf_mgr->nr_vertex_buffers; i++) {
        if (r300->vbuf_mgr->vertex_buffer[i].buffer) {
            pipe_buffer_unmap(pipe, vb_transfer[i]);
            draw_set_mapped_vertex_buffer(r300->draw, i, NULL);
        }
    }

    if (indexed) {
        pipe_buffer_unmap(pipe, ib_transfer);
        draw_set_mapped_index_buffer(r300->draw, NULL);
    }
}

void
softpipe_set_sampler_views(struct pipe_context *pipe,
                           unsigned shader,
                           unsigned start,
                           unsigned num,
                           struct pipe_sampler_view **views)
{
   struct softpipe_context *softpipe = softpipe_context(pipe);
   uint i;

   assert(shader < PIPE_SHADER_TYPES);
   assert(start + num <= ARRAY_SIZE(softpipe->sampler_views[shader]));

   draw_flush(softpipe->draw);

   /* set the new sampler views */
   for (i = 0; i < num; i++) {
      struct sp_sampler_view *sp_sviewsrc;
      struct sp_sampler_view *sp_sviewdst =
         &softpipe->tgsi.sampler[shader]->sp_sview[start + i];
      struct pipe_sampler_view **pview = &softpipe->sampler_views[shader][start + i];
      pipe_sampler_view_reference(pview, views[i]);
      sp_tex_tile_cache_set_sampler_view(softpipe->tex_cache[shader][start + i],
                                         views[i]);
      /*
       * We don't really have variants, however some bits are different per shader,
       * so just copy?
       */
      sp_sviewsrc = (struct sp_sampler_view *)*pview;
      if (sp_sviewsrc) {
         memcpy(sp_sviewdst, sp_sviewsrc, sizeof(*sp_sviewsrc));
         sp_sviewdst->compute_lambda = softpipe_get_lambda_func(&sp_sviewdst->base, shader);
         sp_sviewdst->cache = softpipe->tex_cache[shader][start + i];
      }
      else {
         memset(sp_sviewdst, 0,  sizeof(*sp_sviewsrc));
      }
   }


   /* find highest non-null sampler_views[] entry */
   {
      unsigned j = MAX2(softpipe->num_sampler_views[shader], start + num);
      while (j > 0 && softpipe->sampler_views[shader][j - 1] == NULL)
         j--;
      softpipe->num_sampler_views[shader] = j;
   }

   if (shader == PIPE_SHADER_VERTEX || shader == PIPE_SHADER_GEOMETRY) {
      draw_set_sampler_views(softpipe->draw,
                             shader,
                             softpipe->sampler_views[shader],
                             softpipe->num_sampler_views[shader]);
   }

   softpipe->dirty |= SP_NEW_TEXTURE;
}