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  1. /*
  2.  * Copyright © 2012 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.  
  24. #include "intel_batchbuffer.h"
  25. #include "intel_fbo.h"
  26. #include "brw_context.h"
  27. #include "brw_defines.h"
  28. #include "brw_state.h"
  29. #include "main/stencil.h"
  30.  
  31. static void
  32. gen8_upload_wm_depth_stencil(struct brw_context *brw)
  33. {
  34.    struct gl_context *ctx = &brw->ctx;
  35.    uint32_t dw1 = 0, dw2 = 0, dw3 = 0;
  36.  
  37.    /* _NEW_BUFFERS */
  38.    struct intel_renderbuffer *depth_irb =
  39.       intel_get_renderbuffer(ctx->DrawBuffer, BUFFER_DEPTH);
  40.  
  41.    struct gl_stencil_attrib *stencil = &ctx->Stencil;
  42.  
  43.    /* _NEW_STENCIL | _NEW_BUFFERS */
  44.    if (stencil->_Enabled) {
  45.       #define FUNC intel_translate_compare_func
  46.       #define OP intel_translate_stencil_op
  47.  
  48.       dw1 |=
  49.          GEN8_WM_DS_STENCIL_TEST_ENABLE |
  50.          FUNC(stencil->Function[0]) << GEN8_WM_DS_STENCIL_FUNC_SHIFT |
  51.          OP(stencil->FailFunc[0])  << GEN8_WM_DS_STENCIL_FAIL_OP_SHIFT |
  52.          OP(stencil->ZFailFunc[0]) << GEN8_WM_DS_Z_FAIL_OP_SHIFT |
  53.          OP(stencil->ZPassFunc[0]) << GEN8_WM_DS_Z_PASS_OP_SHIFT;
  54.  
  55.       if (stencil->_WriteEnabled)
  56.          dw1 |= GEN8_WM_DS_STENCIL_BUFFER_WRITE_ENABLE;
  57.  
  58.       dw2 |=
  59.          SET_FIELD(stencil->WriteMask[0] & 0xff, GEN8_WM_DS_STENCIL_WRITE_MASK) |
  60.          SET_FIELD(stencil->ValueMask[0] & 0xff, GEN8_WM_DS_STENCIL_TEST_MASK);
  61.  
  62.       if (stencil->_TestTwoSide) {
  63.          const int b = stencil->_BackFace;
  64.  
  65.          dw1 |=
  66.             GEN8_WM_DS_DOUBLE_SIDED_STENCIL_ENABLE |
  67.             FUNC(stencil->Function[b]) << GEN8_WM_DS_BF_STENCIL_FUNC_SHIFT |
  68.             OP(stencil->FailFunc[b]) << GEN8_WM_DS_BF_STENCIL_FAIL_OP_SHIFT |
  69.             OP(stencil->ZFailFunc[b]) << GEN8_WM_DS_BF_Z_FAIL_OP_SHIFT |
  70.             OP(stencil->ZPassFunc[b]) << GEN8_WM_DS_BF_Z_PASS_OP_SHIFT;
  71.  
  72.          dw2 |= SET_FIELD(stencil->WriteMask[b] & 0xff,
  73.                           GEN8_WM_DS_BF_STENCIL_WRITE_MASK) |
  74.                 SET_FIELD(stencil->ValueMask[b] & 0xff,
  75.                           GEN8_WM_DS_BF_STENCIL_TEST_MASK);
  76.       }
  77.  
  78.       if (brw->gen >= 9) {
  79.          int stencil_ref  = _mesa_get_stencil_ref(ctx, 0);
  80.          int backface_ref = _mesa_get_stencil_ref(ctx, ctx->Stencil._BackFace);
  81.  
  82.          dw3 = SET_FIELD(stencil_ref, GEN9_WM_DS_STENCIL_REF) |
  83.                SET_FIELD(backface_ref, GEN9_WM_DS_BF_STENCIL_REF);
  84.       }
  85.    }
  86.  
  87.    /* _NEW_DEPTH */
  88.    if (ctx->Depth.Test && depth_irb) {
  89.       dw1 |=
  90.          GEN8_WM_DS_DEPTH_TEST_ENABLE |
  91.          FUNC(ctx->Depth.Func) << GEN8_WM_DS_DEPTH_FUNC_SHIFT;
  92.  
  93.       if (ctx->Depth.Mask)
  94.          dw1 |= GEN8_WM_DS_DEPTH_BUFFER_WRITE_ENABLE;
  95.    }
  96.  
  97.    int pkt_len = brw->gen >= 9 ? 4 : 3;
  98.  
  99.    BEGIN_BATCH(pkt_len);
  100.    OUT_BATCH(_3DSTATE_WM_DEPTH_STENCIL << 16 | (pkt_len - 2));
  101.    OUT_BATCH(dw1);
  102.    OUT_BATCH(dw2);
  103.    if (pkt_len > 3) {
  104.       OUT_BATCH(dw3);
  105.    }
  106.    ADVANCE_BATCH();
  107. }
  108.  
  109. const struct brw_tracked_state gen8_wm_depth_stencil = {
  110.    .dirty = {
  111.       .mesa = _NEW_BUFFERS |
  112.               _NEW_DEPTH |
  113.               _NEW_STENCIL,
  114.       .brw  = BRW_NEW_CONTEXT,
  115.    },
  116.    .emit = gen8_upload_wm_depth_stencil,
  117. };
  118.