src/gallium/drivers/i965/brw_pipe_depth.c

   1
   2 #include "util/u_math.h"
   3 #include "util/u_memory.h"
   4
   5 #include "brw_context.h"
   6 #include "brw_defines.h"
   7
   8 /* XXX: Fixme - include this to get IZ_ defines
   9  */
  10 #include "brw_wm.h"
  11
  12 static unsigned brw_translate_compare_func(unsigned func)
  13 {
  14    switch (func) {
  15    case PIPE_FUNC_NEVER:
  16       return BRW_COMPAREFUNCTION_NEVER;
  17    case PIPE_FUNC_LESS:
  18       return BRW_COMPAREFUNCTION_LESS;
  19    case PIPE_FUNC_LEQUAL:
  20       return BRW_COMPAREFUNCTION_LEQUAL;
  21    case PIPE_FUNC_GREATER:
  22       return BRW_COMPAREFUNCTION_GREATER;
  23    case PIPE_FUNC_GEQUAL:
  24       return BRW_COMPAREFUNCTION_GEQUAL;
  25    case PIPE_FUNC_NOTEQUAL:
  26       return BRW_COMPAREFUNCTION_NOTEQUAL;
  27    case PIPE_FUNC_EQUAL:
  28       return BRW_COMPAREFUNCTION_EQUAL;
  29    case PIPE_FUNC_ALWAYS:
  30       return BRW_COMPAREFUNCTION_ALWAYS;
  31    default:
  32       assert(0);
  33       return BRW_COMPAREFUNCTION_ALWAYS;
  34    }
  35 }
  36
  37 static unsigned translate_stencil_op(unsigned op)
  38 {
  39    switch (op) {
  40    case PIPE_STENCIL_OP_KEEP:
  41       return BRW_STENCILOP_KEEP;
  42    case PIPE_STENCIL_OP_ZERO:
  43       return BRW_STENCILOP_ZERO;
  44    case PIPE_STENCIL_OP_REPLACE:
  45       return BRW_STENCILOP_REPLACE;
  46    case PIPE_STENCIL_OP_INCR:
  47       return BRW_STENCILOP_INCRSAT;
  48    case PIPE_STENCIL_OP_DECR:
  49       return BRW_STENCILOP_DECRSAT;
  50    case PIPE_STENCIL_OP_INCR_WRAP:
  51       return BRW_STENCILOP_INCR;
  52    case PIPE_STENCIL_OP_DECR_WRAP:
  53       return BRW_STENCILOP_DECR;
  54    case PIPE_STENCIL_OP_INVERT:
  55       return BRW_STENCILOP_INVERT;
  56    default:
  57       assert(0);
  58       return BRW_STENCILOP_ZERO;
  59    }
  60 }
  61
  62 static void create_bcc_state( struct brw_depth_stencil_state *zstencil,
  63                               const struct pipe_depth_stencil_alpha_state *templ )
  64 {
  65    if (templ->stencil[0].enabled) {
  66       zstencil->cc0.stencil_enable = 1;
  67       zstencil->cc0.stencil_func =
  68          brw_translate_compare_func(templ->stencil[0].func);
  69       zstencil->cc0.stencil_fail_op =
  70          translate_stencil_op(templ->stencil[0].fail_op);
  71       zstencil->cc0.stencil_pass_depth_fail_op =
  72          translate_stencil_op(templ->stencil[0].zfail_op);
  73       zstencil->cc0.stencil_pass_depth_pass_op =
  74          translate_stencil_op(templ->stencil[0].zpass_op);
  75       zstencil->cc1.stencil_write_mask = templ->stencil[0].writemask;
  76       zstencil->cc1.stencil_test_mask = templ->stencil[0].valuemask;
  77
  78       if (templ->stencil[1].enabled) {
  79          zstencil->cc0.bf_stencil_enable = 1;
  80          zstencil->cc0.bf_stencil_func =
  81             brw_translate_compare_func(templ->stencil[1].func);
  82          zstencil->cc0.bf_stencil_fail_op =
  83             translate_stencil_op(templ->stencil[1].fail_op);
  84          zstencil->cc0.bf_stencil_pass_depth_fail_op =
  85             translate_stencil_op(templ->stencil[1].zfail_op);
  86          zstencil->cc0.bf_stencil_pass_depth_pass_op =
  87             translate_stencil_op(templ->stencil[1].zpass_op);
  88          zstencil->cc2.bf_stencil_write_mask = templ->stencil[1].writemask;
  89          zstencil->cc2.bf_stencil_test_mask = templ->stencil[1].valuemask;
  90       }
  91
  92       zstencil->cc0.stencil_write_enable = (zstencil->cc1.stencil_write_mask ||
  93                                             zstencil->cc2.bf_stencil_write_mask);
  94    }
  95
  96
  97    if (templ->alpha.enabled) {
  98       zstencil->cc3.alpha_test = 1;
  99       zstencil->cc3.alpha_test_func = brw_translate_compare_func(templ->alpha.func);
 100       zstencil->cc3.alpha_test_format = BRW_ALPHATEST_FORMAT_UNORM8;
 101       zstencil->cc7.alpha_ref.ub[0] = float_to_ubyte(templ->alpha.ref_value);
 102    }
 103
 104    if (templ->depth.enabled) {
 105       zstencil->cc2.depth_test = 1;
 106       zstencil->cc2.depth_test_function = brw_translate_compare_func(templ->depth.func);
 107       zstencil->cc2.depth_write_enable = templ->depth.writemask;
 108    }
 109 }
 110
 111 static void create_wm_iz_state( struct brw_depth_stencil_state *zstencil )
 112 {
 113    if (zstencil->cc3.alpha_test)
 114       zstencil->iz_lookup |= IZ_PS_KILL_ALPHATEST_BIT;
 115
 116    if (zstencil->cc2.depth_test)
 117       zstencil->iz_lookup |= IZ_DEPTH_TEST_ENABLE_BIT;
 118
 119    if (zstencil->cc2.depth_write_enable)
 120       zstencil->iz_lookup |= IZ_DEPTH_WRITE_ENABLE_BIT;
 121
 122    if (zstencil->cc0.stencil_enable)
 123       zstencil->iz_lookup |= IZ_STENCIL_TEST_ENABLE_BIT;
 124
 125    if (zstencil->cc0.stencil_write_enable)
 126       zstencil->iz_lookup |= IZ_STENCIL_WRITE_ENABLE_BIT;
 127
 128 }
 129
 130
 131 static void *
 132 brw_create_depth_stencil_state( struct pipe_context *pipe,
 133                                 const struct pipe_depth_stencil_alpha_state *templ )
 134 {
 135    struct brw_depth_stencil_state *zstencil = CALLOC_STRUCT(brw_depth_stencil_state);
 136
 137    create_bcc_state( zstencil, templ );
 138    create_wm_iz_state( zstencil );
 139
 140    return (void *)zstencil;
 141 }
 142
 143
 144 static void brw_bind_depth_stencil_state(struct pipe_context *pipe,
 145                                          void *cso)
 146 {
 147    struct brw_context *brw = brw_context(pipe);
 148    brw->curr.zstencil = (const struct brw_depth_stencil_state *)cso;
 149    brw->state.dirty.mesa |= PIPE_NEW_DEPTH_STENCIL_ALPHA;
 150 }
 151
 152 static void brw_delete_depth_stencil_state(struct pipe_context *pipe,
 153                                            void *cso)
 154 {
 155    struct brw_context *brw = brw_context(pipe);
 156    assert((const void *)cso != (const void *)brw->curr.zstencil);
 157    FREE(cso);
 158 }
 159
 160 static void brw_set_stencil_ref(struct pipe_context *pipe,
 161                                 const struct pipe_stencil_ref *stencil_ref)
 162 {
 163    struct brw_context *brw = brw_context(pipe);
 164    brw->curr.cc1_stencil_ref.stencil_ref = stencil_ref->ref_value[0];
 165    brw->curr.cc1_stencil_ref.bf_stencil_ref = stencil_ref->ref_value[1];
 166
 167    brw->state.dirty.mesa |= PIPE_NEW_DEPTH_STENCIL_ALPHA;
 168 }
 169
 170 void brw_pipe_depth_stencil_init( struct brw_context *brw )
 171 {
 172    brw->base.set_stencil_ref = brw_set_stencil_ref;
 173    brw->base.create_depth_stencil_alpha_state = brw_create_depth_stencil_state;
 174    brw->base.bind_depth_stencil_alpha_state = brw_bind_depth_stencil_state;
 175    brw->base.delete_depth_stencil_alpha_state = brw_delete_depth_stencil_state;
 176 }
 177
 178 void brw_pipe_depth_stencil_cleanup( struct brw_context *brw )
 179 {
 180 }