sp_quad_fs.c File Reference

Include dependency graph for sp_quad_fs.c:

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Data Structures
struct	quad_shade_stage
Functions
static struct quad_shade_stage *	quad_shade_stage (struct quad_stage *qs)
	cast wrapper
static void	shade_quad (struct quad_stage *qs, struct quad_header *quad)
	Execute fragment shader for the four fragments in the quad.
static void	shade_begin (struct quad_stage *qs)
	Per-primitive (or per-begin?) setup.
static void	shade_destroy (struct quad_stage *qs)
struct quad_stage *	sp_quad_shade_stage (struct softpipe_context *softpipe)

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Function Documentation

static struct quad_shade_stage* quad_shade_stage

(

struct quad_stage *

qs

)

[static, read]

cast wrapper

Definition at line 62 of file sp_quad_fs.c.

{
   return (struct quad_shade_stage *) qs;
}

static void shade_begin

(

struct quad_stage *

qs

)

[static]

Per-primitive (or per-begin?) setup.

Definition at line 146 of file sp_quad_fs.c.

References quad_stage::begin, softpipe_context::fs, quad_shade_stage::machine, MAX2, quad_stage::next, softpipe_context::num_samplers, softpipe_context::num_textures, sp_fragment_shader::prepare, quad_shade_stage(), softpipe_context::sampler, quad_shade_stage::samplers, quad_stage::softpipe, tgsi_sampler::state, softpipe_context::texture, and tgsi_sampler::texture.

{
   struct quad_shade_stage *qss = quad_shade_stage(qs);
   struct softpipe_context *softpipe = qs->softpipe;
   unsigned i;
   unsigned num = MAX2(softpipe->num_textures, softpipe->num_samplers);

   /* set TGSI sampler state that varies */
   for (i = 0; i < num; i++) {
      qss->samplers[i].state = softpipe->sampler[i];
      qss->samplers[i].texture = softpipe->texture[i];
   }

   softpipe->fs->prepare( softpipe->fs, 
                          &qss->machine,
                          qss->samplers );

   qs->next->begin(qs->next);
}

static void shade_destroy

(

struct quad_stage *

qs

)

[static]

Definition at line 167 of file sp_quad_fs.c.

References FREE, quad_shade_stage::inputs, quad_shade_stage::machine, quad_shade_stage::outputs, and tgsi_exec_machine_free_data().

{
   struct quad_shade_stage *qss = (struct quad_shade_stage *) qs;

   tgsi_exec_machine_free_data(&qss->machine);
   FREE( qss->inputs );
   FREE( qss->outputs );
   FREE( qs );
}

static void shade_quad	(	struct quad_stage *	qs,
		struct quad_header *	quad
	)			[static]

Execute fragment shader for the four fragments in the quad.

Definition at line 73 of file sp_quad_fs.c.

References tgsi_interp_coef::a0, quad_header::coef, quad_header_output::color, tgsi_exec_machine::Consts, tgsi_interp_coef::dadx, tgsi_interp_coef::dady, quad_header_output::depth, tgsi_exec_channel::f, FALSE, softpipe_context::fs, sp_fragment_shader::info, quad_header::inout, quad_header::input, tgsi_exec_machine::InterpCoefs, quad_shade_stage::machine, softpipe_context::mapped_constants, quad_header_inout::mask, quad_stage::next, tgsi_shader_info::num_outputs, quad_header::output, tgsi_shader_info::output_semantic_index, tgsi_shader_info::output_semantic_name, tgsi_exec_machine::Outputs, PIPE_SHADER_FRAGMENT, quad_header::posCoef, quad_shade_stage(), quad_stage::run, sp_fragment_shader::run, quad_stage::softpipe, quad_shade_stage::stage, TGSI_SEMANTIC_COLOR, TGSI_SEMANTIC_POSITION, TRUE, quad_header_input::x0, tgsi_exec_vector::xyzw, and quad_header_input::y0.

{
   struct quad_shade_stage *qss = quad_shade_stage( qs );
   struct softpipe_context *softpipe = qs->softpipe;
   struct tgsi_exec_machine *machine = &qss->machine;
   boolean z_written;
   
   /* Consts do not require 16 byte alignment. */
   machine->Consts = softpipe->mapped_constants[PIPE_SHADER_FRAGMENT];

   machine->InterpCoefs = quad->coef;

   /* run shader */
   quad->inout.mask &= softpipe->fs->run( softpipe->fs, 
                                    &qss->machine,
                                    quad );

   /* store outputs */
   z_written = FALSE;
   {
      const ubyte *sem_name = softpipe->fs->info.output_semantic_name;
      const ubyte *sem_index = softpipe->fs->info.output_semantic_index;
      const uint n = qss->stage.softpipe->fs->info.num_outputs;
      uint i;
      for (i = 0; i < n; i++) {
         switch (sem_name[i]) {
         case TGSI_SEMANTIC_COLOR:
            {
               uint cbuf = sem_index[i];
               memcpy(quad->output.color[cbuf],
                      &machine->Outputs[i].xyzw[0].f[0],
                      sizeof(quad->output.color[0]) );
            }
            break;
         case TGSI_SEMANTIC_POSITION:
            {
               uint j;
               for (j = 0; j < 4; j++) {
                  quad->output.depth[j] = machine->Outputs[0].xyzw[2].f[j];
               }
               z_written = TRUE;
            }
            break;
         }
      }
   }

   if (!z_written) {
      /* compute Z values now, as in the quad earlyz stage */
      /* XXX we should really only do this if the earlyz stage is not used */
      const float fx = (float) quad->input.x0;
      const float fy = (float) quad->input.y0;
      const float dzdx = quad->posCoef->dadx[2];
      const float dzdy = quad->posCoef->dady[2];
      const float z0 = quad->posCoef->a0[2] + dzdx * fx + dzdy * fy;

      quad->output.depth[0] = z0;
      quad->output.depth[1] = z0 + dzdx;
      quad->output.depth[2] = z0 + dzdy;
      quad->output.depth[3] = z0 + dzdx + dzdy;
   }

   /* shader may cull fragments */
   if( quad->inout.mask ) {
      qs->next->run( qs->next, quad );
   }
}

struct quad_stage* sp_quad_shade_stage

(

struct softpipe_context *

softpipe

)

[read]

Definition at line 178 of file sp_quad_fs.c.

References align16(), assert, quad_stage::begin, tgsi_sampler::cache, CALLOC_STRUCT, quad_stage::destroy, tgsi_sampler::get_samples, tgsi_exec_machine::Inputs, quad_shade_stage::inputs, quad_shade_stage::machine, MALLOC, tgsi_exec_machine::Outputs, quad_shade_stage::outputs, softpipe_context::pipe, tgsi_sampler::pipe, PIPE_MAX_ATTRIBS, PIPE_MAX_SAMPLERS, quad_stage::run, quad_shade_stage::samplers, shade_begin(), shade_destroy(), shade_quad(), quad_stage::softpipe, sp_get_samples(), quad_shade_stage::stage, softpipe_context::tex_cache, and tgsi_exec_machine_init().

{
   struct quad_shade_stage *qss = CALLOC_STRUCT(quad_shade_stage);
   uint i;

   /* allocate storage for program inputs/outputs, aligned to 16 bytes */
   qss->inputs = MALLOC(PIPE_MAX_ATTRIBS * sizeof(*qss->inputs) + 16);
   qss->outputs = MALLOC(PIPE_MAX_ATTRIBS * sizeof(*qss->outputs) + 16);
   qss->machine.Inputs = align16(qss->inputs);
   qss->machine.Outputs = align16(qss->outputs);

   qss->stage.softpipe = softpipe;
   qss->stage.begin = shade_begin;
   qss->stage.run = shade_quad;
   qss->stage.destroy = shade_destroy;

   /* set TGSI sampler state that's constant */
   for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
      assert(softpipe->tex_cache[i]);
      qss->samplers[i].get_samples = sp_get_samples;
      qss->samplers[i].pipe = &softpipe->pipe;
      qss->samplers[i].cache = softpipe->tex_cache[i];
   }

   tgsi_exec_machine_init( &qss->machine );

   return &qss->stage;
}

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