sp_quad_alpha_test.c File Reference

Include dependency graph for sp_quad_alpha_test.c:

Go to the source code of this file.

Functions
static void	alpha_test_quad (struct quad_stage *qs, struct quad_header *quad)
	quad alpha test
static void	alpha_test_begin (struct quad_stage *qs)
static void	alpha_test_destroy (struct quad_stage *qs)
struct quad_stage *	sp_quad_alpha_test_stage (struct softpipe_context *softpipe)

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Function Documentation

static void alpha_test_begin

(

struct quad_stage *

qs

)

[static]

Definition at line 85 of file sp_quad_alpha_test.c.

References quad_stage::begin, and quad_stage::next.

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

static void alpha_test_destroy

(

struct quad_stage *

qs

)

[static]

Definition at line 91 of file sp_quad_alpha_test.c.

References FREE.

{
   FREE( qs );
}

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

quad alpha test

Definition at line 14 of file sp_quad_alpha_test.c.

References pipe_depth_stencil_alpha_state::alpha, assert, quad_header_output::color, softpipe_context::depth_stencil, pipe_alpha_state::func, quad_header::inout, quad_header_inout::mask, MASK_ALL, quad_stage::next, quad_header::output, PIPE_FUNC_ALWAYS, PIPE_FUNC_EQUAL, PIPE_FUNC_GEQUAL, PIPE_FUNC_GREATER, PIPE_FUNC_LEQUAL, PIPE_FUNC_LESS, PIPE_FUNC_NEVER, PIPE_FUNC_NOTEQUAL, QUAD_SIZE, pipe_alpha_state::ref, quad_stage::run, and quad_stage::softpipe.

{
   struct softpipe_context *softpipe = qs->softpipe;
   const float ref = softpipe->depth_stencil->alpha.ref;
   unsigned passMask = 0x0, j;
   const uint cbuf = 0; /* only output[0].alpha is tested */
   const float *aaaa = quad->output.color[cbuf][3];

   switch (softpipe->depth_stencil->alpha.func) {
   case PIPE_FUNC_NEVER:
      break;
   case PIPE_FUNC_LESS:
      /*
       * If mask were an array [4] we could do this SIMD-style:
       * passMask = (quad->outputs.color[0][3] <= vec4(ref));
       */
      for (j = 0; j < QUAD_SIZE; j++) {
         if (aaaa[j] < ref) {
            passMask |= (1 << j);
         }
      }
      break;
   case PIPE_FUNC_EQUAL:
      for (j = 0; j < QUAD_SIZE; j++) {
         if (aaaa[j] == ref) {
            passMask |= (1 << j);
         }
      }
      break;
   case PIPE_FUNC_LEQUAL:
      for (j = 0; j < QUAD_SIZE; j++) {
         if (aaaa[j] <= ref) {
            passMask |= (1 << j);
         }
      }
      break;
   case PIPE_FUNC_GREATER:
      for (j = 0; j < QUAD_SIZE; j++) {
         if (aaaa[j] > ref) {
            passMask |= (1 << j);
         }
      }
      break;
   case PIPE_FUNC_NOTEQUAL:
      for (j = 0; j < QUAD_SIZE; j++) {
         if (aaaa[j] != ref) {
            passMask |= (1 << j);
         }
      }
      break;
   case PIPE_FUNC_GEQUAL:
      for (j = 0; j < QUAD_SIZE; j++) {
         if (aaaa[j] >= ref) {
            passMask |= (1 << j);
         }
      }
      break;
   case PIPE_FUNC_ALWAYS:
      passMask = MASK_ALL;
      break;
   default:
      assert(0);
   }

   quad->inout.mask &= passMask;

   if (quad->inout.mask)
      qs->next->run(qs->next, quad);
}

struct quad_stage* sp_quad_alpha_test_stage

(

struct softpipe_context *

softpipe

)

[read]

Definition at line 98 of file sp_quad_alpha_test.c.

References alpha_test_begin(), alpha_test_destroy(), alpha_test_quad(), quad_stage::begin, CALLOC_STRUCT, quad_stage::destroy, quad_stage::run, and quad_stage::softpipe.

{
   struct quad_stage *stage = CALLOC_STRUCT(quad_stage);

   stage->softpipe = softpipe;
   stage->begin = alpha_test_begin;
   stage->run = alpha_test_quad;
   stage->destroy = alpha_test_destroy;

   return stage;
}

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