src/mesa/drivers/dri/i965/gen6_depthstencil.c

   1 /*
   2  * Copyright © 2009 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *    Eric Anholt <eric@anholt.net>
  25  *
  26  */
  27
  28 #include "intel_fbo.h"
  29 #include "brw_context.h"
  30 #include "brw_state.h"
  31
  32 static void
  33 gen6_upload_depth_stencil_state(struct brw_context *brw)
  34 {
  35    struct gl_context *ctx = &brw->intel.ctx;
  36    struct gen6_depth_stencil_state *ds;
  37    struct intel_renderbuffer *depth_irb;
  38
  39    /* _NEW_BUFFERS */
  40    depth_irb = intel_get_renderbuffer(ctx->DrawBuffer, BUFFER_DEPTH);
  41
  42    ds = brw_state_batch(brw, AUB_TRACE_DEPTH_STENCIL_STATE,
  43                         sizeof(*ds), 64,
  44                         &brw->cc.depth_stencil_state_offset);
  45    memset(ds, 0, sizeof(*ds));
  46
  47    /* _NEW_STENCIL */
  48    if (ctx->Stencil._Enabled) {
  49       int back = ctx->Stencil._BackFace;
  50
  51       ds->ds0.stencil_enable = 1;
  52       ds->ds0.stencil_func =
  53          intel_translate_compare_func(ctx->Stencil.Function[0]);
  54       ds->ds0.stencil_fail_op =
  55          intel_translate_stencil_op(ctx->Stencil.FailFunc[0]);
  56       ds->ds0.stencil_pass_depth_fail_op =
  57          intel_translate_stencil_op(ctx->Stencil.ZFailFunc[0]);
  58       ds->ds0.stencil_pass_depth_pass_op =
  59          intel_translate_stencil_op(ctx->Stencil.ZPassFunc[0]);
  60       ds->ds1.stencil_write_mask = ctx->Stencil.WriteMask[0];
  61       ds->ds1.stencil_test_mask = ctx->Stencil.ValueMask[0];
  62
  63       if (ctx->Stencil._TestTwoSide) {
  64          ds->ds0.bf_stencil_enable = 1;
  65          ds->ds0.bf_stencil_func =
  66             intel_translate_compare_func(ctx->Stencil.Function[back]);
  67          ds->ds0.bf_stencil_fail_op =
  68             intel_translate_stencil_op(ctx->Stencil.FailFunc[back]);
  69          ds->ds0.bf_stencil_pass_depth_fail_op =
  70             intel_translate_stencil_op(ctx->Stencil.ZFailFunc[back]);
  71          ds->ds0.bf_stencil_pass_depth_pass_op =
  72             intel_translate_stencil_op(ctx->Stencil.ZPassFunc[back]);
  73          ds->ds1.bf_stencil_write_mask = ctx->Stencil.WriteMask[back];
  74          ds->ds1.bf_stencil_test_mask = ctx->Stencil.ValueMask[back];
  75       }
  76
  77       /* Not really sure about this:
  78        */
  79       if (ctx->Stencil.WriteMask[0] ||
  80           (ctx->Stencil._TestTwoSide && ctx->Stencil.WriteMask[back]))
  81          ds->ds0.stencil_write_enable = 1;
  82    }
  83
  84    /* _NEW_DEPTH */
  85    if ((ctx->Depth.Test || brw->hiz.op) && depth_irb) {
  86       assert(brw->hiz.op != BRW_HIZ_OP_DEPTH_RESOLVE || ctx->Depth.Test);
  87       assert(brw->hiz.op != BRW_HIZ_OP_HIZ_RESOLVE   || !ctx->Depth.Test);
  88       assert(brw->hiz.op != BRW_HIZ_OP_DEPTH_CLEAR   || !ctx->Depth.Test);
  89
  90       ds->ds2.depth_test_enable = ctx->Depth.Test;
  91       ds->ds2.depth_test_func = intel_translate_compare_func(ctx->Depth.Func);
  92       ds->ds2.depth_write_enable = ctx->Depth.Mask;
  93    }
  94
  95    brw->state.dirty.cache |= CACHE_NEW_DEPTH_STENCIL_STATE;
  96 }
  97
  98 const struct brw_tracked_state gen6_depth_stencil_state = {
  99    .dirty = {
 100       .mesa = _NEW_DEPTH | _NEW_STENCIL,
 101       .brw  = (BRW_NEW_BATCH |
 102                BRW_NEW_HIZ),
 103       .cache = 0,
 104    },
 105    .emit = gen6_upload_depth_stencil_state,
 106 };