src/mesa/drivers/dri/i965/gen8_wm_depth_stencil.c

   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
  30 static void
  31 gen8_upload_wm_depth_stencil(struct brw_context *brw)
  32 {
  33    struct gl_context *ctx = &brw->ctx;
  34    uint32_t dw1 = 0, dw2 = 0;
  35
  36    /* _NEW_BUFFERS */
  37    struct intel_renderbuffer *depth_irb =
  38       intel_get_renderbuffer(ctx->DrawBuffer, BUFFER_DEPTH);
  39
  40    struct gl_stencil_attrib *stencil = &ctx->Stencil;
  41
  42    /* _NEW_STENCIL | _NEW_BUFFERS */
  43    if (stencil->_Enabled) {
  44       #define FUNC intel_translate_compare_func
  45       #define OP intel_translate_stencil_op
  46
  47       dw1 |=
  48          GEN8_WM_DS_STENCIL_TEST_ENABLE |
  49          FUNC(stencil->Function[0]) << GEN8_WM_DS_STENCIL_FUNC_SHIFT |
  50          OP(stencil->FailFunc[0])  << GEN8_WM_DS_STENCIL_FAIL_OP_SHIFT |
  51          OP(stencil->ZFailFunc[0]) << GEN8_WM_DS_Z_FAIL_OP_SHIFT |
  52          OP(stencil->ZPassFunc[0]) << GEN8_WM_DS_Z_PASS_OP_SHIFT;
  53
  54       if (stencil->_WriteEnabled)
  55          dw1 |= GEN8_WM_DS_STENCIL_BUFFER_WRITE_ENABLE;
  56
  57       dw2 |=
  58          SET_FIELD(stencil->WriteMask[0] & 0xff, GEN8_WM_DS_STENCIL_WRITE_MASK) |
  59          SET_FIELD(stencil->ValueMask[0] & 0xff, GEN8_WM_DS_STENCIL_TEST_MASK);
  60
  61       if (stencil->_TestTwoSide) {
  62          const int b = stencil->_BackFace;
  63
  64          dw1 |=
  65             GEN8_WM_DS_DOUBLE_SIDED_STENCIL_ENABLE |
  66             FUNC(stencil->Function[b]) << GEN8_WM_DS_BF_STENCIL_FUNC_SHIFT |
  67             OP(stencil->FailFunc[b]) << GEN8_WM_DS_BF_STENCIL_FAIL_OP_SHIFT |
  68             OP(stencil->ZFailFunc[b]) << GEN8_WM_DS_BF_Z_FAIL_OP_SHIFT |
  69             OP(stencil->ZPassFunc[b]) << GEN8_WM_DS_BF_Z_PASS_OP_SHIFT;
  70
  71          dw2 |= SET_FIELD(stencil->WriteMask[b] & 0xff,
  72                           GEN8_WM_DS_BF_STENCIL_WRITE_MASK) |
  73                 SET_FIELD(stencil->ValueMask[b] & 0xff,
  74                           GEN8_WM_DS_BF_STENCIL_TEST_MASK);
  75       }
  76    }
  77
  78    /* _NEW_DEPTH */
  79    if (ctx->Depth.Test && depth_irb) {
  80       dw1 |=
  81          GEN8_WM_DS_DEPTH_TEST_ENABLE |
  82          FUNC(ctx->Depth.Func) << GEN8_WM_DS_DEPTH_FUNC_SHIFT;
  83
  84       if (ctx->Depth.Mask)
  85          dw1 |= GEN8_WM_DS_DEPTH_BUFFER_WRITE_ENABLE;
  86    }
  87
  88    BEGIN_BATCH(3);
  89    OUT_BATCH(_3DSTATE_WM_DEPTH_STENCIL << 16 | (3 - 2));
  90    OUT_BATCH(dw1);
  91    OUT_BATCH(dw2);
  92    ADVANCE_BATCH();
  93 }
  94
  95 const struct brw_tracked_state gen8_wm_depth_stencil = {
  96    .dirty = {
  97       .mesa = _NEW_BUFFERS | _NEW_DEPTH | _NEW_STENCIL,
  98       .brw  = BRW_NEW_CONTEXT,
  99       .cache = 0,
 100    },
 101    .emit = gen8_upload_wm_depth_stencil,
 102 };