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_ref = templ->stencil[0].ref_value;
  76       zstencil->cc1.stencil_write_mask = templ->stencil[0].writemask;
  77       zstencil->cc1.stencil_test_mask = templ->stencil[0].valuemask;
  78
  79       if (templ->stencil[1].enabled) {
  80          zstencil->cc0.bf_stencil_enable = 1;
  81          zstencil->cc0.bf_stencil_func =
  82             brw_translate_compare_func(templ->stencil[1].func);
  83          zstencil->cc0.bf_stencil_fail_op =
  84             translate_stencil_op(templ->stencil[1].fail_op);
  85          zstencil->cc0.bf_stencil_pass_depth_fail_op =
  86             translate_stencil_op(templ->stencil[1].zfail_op);
  87          zstencil->cc0.bf_stencil_pass_depth_pass_op =
  88             translate_stencil_op(templ->stencil[1].zpass_op);
  89          zstencil->cc1.bf_stencil_ref = templ->stencil[1].ref_value;
  90          zstencil->cc2.bf_stencil_write_mask = templ->stencil[1].writemask;
  91          zstencil->cc2.bf_stencil_test_mask = templ->stencil[1].valuemask;
  92       }
  93
  94       zstencil->cc0.stencil_write_enable = (zstencil->cc1.stencil_write_mask ||
  95                                             zstencil->cc2.bf_stencil_write_mask);
  96    }
  97
  98
  99    if (templ->alpha.enabled) {
 100       zstencil->cc3.alpha_test = 1;
 101       zstencil->cc3.alpha_test_func = brw_translate_compare_func(templ->alpha.func);
 102       zstencil->cc3.alpha_test_format = BRW_ALPHATEST_FORMAT_UNORM8;
 103       zstencil->cc7.alpha_ref.ub[0] = float_to_ubyte(templ->alpha.ref_value);
 104    }
 105
 106    if (templ->depth.enabled) {
 107       zstencil->cc2.depth_test = 1;
 108       zstencil->cc2.depth_test_function = brw_translate_compare_func(templ->depth.func);
 109       zstencil->cc2.depth_write_enable = templ->depth.writemask;
 110    }
 111 }
 112
 113 static void create_wm_iz_state( struct brw_depth_stencil_state *zstencil )
 114 {
 115    if (zstencil->cc3.alpha_test)
 116       zstencil->iz_lookup |= IZ_PS_KILL_ALPHATEST_BIT;
 117
 118    if (zstencil->cc2.depth_test)
 119       zstencil->iz_lookup |= IZ_DEPTH_TEST_ENABLE_BIT;
 120
 121    if (zstencil->cc2.depth_write_enable)
 122       zstencil->iz_lookup |= IZ_DEPTH_WRITE_ENABLE_BIT;
 123
 124    if (zstencil->cc0.stencil_enable)
 125       zstencil->iz_lookup |= IZ_STENCIL_TEST_ENABLE_BIT;
 126
 127    if (zstencil->cc0.stencil_write_enable)
 128       zstencil->iz_lookup |= IZ_STENCIL_WRITE_ENABLE_BIT;
 129
 130 }
 131
 132
 133 static void *
 134 brw_create_depth_stencil_state( struct pipe_context *pipe,
 135                                 const struct pipe_depth_stencil_alpha_state *templ )
 136 {
 137    struct brw_depth_stencil_state *zstencil = CALLOC_STRUCT(brw_depth_stencil_state);
 138
 139    create_bcc_state( zstencil, templ );
 140    create_wm_iz_state( zstencil );
 141
 142    return (void *)zstencil;
 143 }
 144
 145
 146 static void brw_bind_depth_stencil_state(struct pipe_context *pipe,
 147                                          void *cso)
 148 {
 149    struct brw_context *brw = brw_context(pipe);
 150    brw->curr.zstencil = (const struct brw_depth_stencil_state *)cso;
 151    brw->state.dirty.mesa |= PIPE_NEW_DEPTH_STENCIL_ALPHA;
 152 }
 153
 154 static void brw_delete_depth_stencil_state(struct pipe_context *pipe,
 155                                            void *cso)
 156 {
 157    struct brw_context *brw = brw_context(pipe);
 158    assert((const void *)cso != (const void *)brw->curr.zstencil);
 159    FREE(cso);
 160 }
 161
 162
 163 void brw_pipe_depth_stencil_init( struct brw_context *brw )
 164 {
 165    brw->base.create_depth_stencil_alpha_state = brw_create_depth_stencil_state;
 166    brw->base.bind_depth_stencil_alpha_state = brw_bind_depth_stencil_state;
 167    brw->base.delete_depth_stencil_alpha_state = brw_delete_depth_stencil_state;
 168 }
 169
 170 void brw_pipe_depth_stencil_cleanup( struct brw_context *brw )
 171 {
 172 }