Exemple #1
0
static void
aaline_first_line(struct draw_stage *stage, struct prim_header *header)
{
   auto struct aaline_stage *aaline = aaline_stage(stage);
   struct draw_context *draw = stage->draw;
   struct pipe_context *pipe = draw->pipe;
   const struct pipe_rasterizer_state *rast = draw->rasterizer;
   uint num_samplers;
   void *r;

   assert(draw->rasterizer->line_smooth);

   if (draw->rasterizer->line_width <= 2.2)
      aaline->half_line_width = 1.1f;
   else
      aaline->half_line_width = 0.5f * draw->rasterizer->line_width;

   /*
    * Bind (generate) our fragprog, sampler and texture
    */
   if (!bind_aaline_fragment_shader(aaline)) {
      stage->line = draw_pipe_passthrough_line;
      stage->line(stage, header);
      return;
   }

   draw_aaline_prepare_outputs(draw, draw->pipeline.aaline);

   /* how many samplers? */
   /* we'll use sampler/texture[pstip->sampler_unit] for the stipple */
   num_samplers = MAX2(aaline->num_sampler_views, aaline->num_samplers);
   num_samplers = MAX2(num_samplers, aaline->fs->sampler_unit + 1);

   aaline->state.sampler[aaline->fs->sampler_unit] = aaline->sampler_cso;
   pipe_sampler_view_reference(&aaline->state.sampler_views[aaline->fs->sampler_unit],
                               aaline->sampler_view);

   draw->suspend_flushing = TRUE;

   aaline->driver_bind_sampler_states(pipe, PIPE_SHADER_FRAGMENT, 0,
                                      num_samplers, aaline->state.sampler);

   aaline->driver_set_sampler_views(pipe, PIPE_SHADER_FRAGMENT, 0,
                                    num_samplers, aaline->state.sampler_views);

   /* Disable triangle culling, stippling, unfilled mode etc. */
   r = draw_get_rasterizer_no_cull(draw, rast->scissor, rast->flatshade);
   pipe->bind_rasterizer_state(pipe, r);

   draw->suspend_flushing = FALSE;

   /* now really draw first line */
   stage->line = aaline_line;
   stage->line(stage, header);
}
Exemple #2
0
/**
 * Prepare outputs slots from the draw module
 *
 * Certain parts of the draw module can emit additional
 * outputs that can be quite useful to the backends, a good
 * example of it is the process of decomposing primitives
 * into wireframes (aka. lines) which normally would lose
 * the face-side information, but using this method we can
 * inject another shader output which passes the original
 * face side information to the backend.
 */
void
draw_prepare_shader_outputs(struct draw_context *draw)
{
   draw_remove_extra_vertex_attribs(draw);
   draw_prim_assembler_prepare_outputs(draw->ia);
   draw_unfilled_prepare_outputs(draw, draw->pipeline.unfilled);
   if (draw->pipeline.aapoint)
      draw_aapoint_prepare_outputs(draw, draw->pipeline.aapoint);
   if (draw->pipeline.aaline)
      draw_aaline_prepare_outputs(draw, draw->pipeline.aaline);
}