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

   1 /*
   2  Copyright (C) Intel Corp.  2006.  All Rights Reserved.
   3  Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
   4  develop this 3D driver.
   5
   6  Permission is hereby granted, free of charge, to any person obtaining
   7  a copy of this software and associated documentation files (the
   8  "Software"), to deal in the Software without restriction, including
   9  without limitation the rights to use, copy, modify, merge, publish,
  10  distribute, sublicense, and/or sell copies of the Software, and to
  11  permit persons to whom the Software is furnished to do so, subject to
  12  the following conditions:
  13
  14  The above copyright notice and this permission notice (including the
  15  next paragraph) shall be included in all copies or substantial
  16  portions of the Software.
  17
  18  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25
  26  **********************************************************************/
  27  /*
  28   * Authors:
  29   *   Keith Whitwell <keith@tungstengraphics.com>
  30   */
  31
  32
  33 #include "brw_context.h"
  34 #include "brw_state.h"
  35 #include "brw_defines.h"
  36 #include "brw_util.h"
  37 #include "main/macros.h"
  38 #include "main/enums.h"
  39
  40 static void prepare_cc_vp( struct brw_context *brw )
  41 {
  42    GLcontext *ctx = &brw->intel.ctx;
  43    struct brw_cc_viewport ccv;
  44
  45    memset(&ccv, 0, sizeof(ccv));
  46
  47    /* _NEW_TRANSOFORM */
  48    if (ctx->Transform.DepthClamp) {
  49       /* _NEW_VIEWPORT */
  50       ccv.min_depth = MIN2(ctx->Viewport.Near, ctx->Viewport.Far);
  51       ccv.max_depth = MAX2(ctx->Viewport.Near, ctx->Viewport.Far);
  52    } else {
  53       ccv.min_depth = 0.0;
  54       ccv.max_depth = 1.0;
  55    }
  56
  57    dri_bo_unreference(brw->cc.vp_bo);
  58    brw->cc.vp_bo = brw_cache_data( &brw->cache, BRW_CC_VP, &ccv, NULL, 0 );
  59 }
  60
  61 const struct brw_tracked_state brw_cc_vp = {
  62    .dirty = {
  63       .mesa = _NEW_VIEWPORT | _NEW_TRANSFORM,
  64       .brw = BRW_NEW_CONTEXT,
  65       .cache = 0
  66    },
  67    .prepare = prepare_cc_vp
  68 };
  69
  70 struct brw_cc_unit_key {
  71    GLboolean stencil, stencil_two_side, color_blend, alpha_enabled;
  72
  73    GLenum stencil_func[2], stencil_fail_op[2];
  74    GLenum stencil_pass_depth_fail_op[2], stencil_pass_depth_pass_op[2];
  75    GLubyte stencil_ref[2], stencil_write_mask[2], stencil_test_mask[2];
  76    GLenum logic_op;
  77
  78    GLenum blend_eq_rgb, blend_eq_a;
  79    GLenum blend_src_rgb, blend_src_a;
  80    GLenum blend_dst_rgb, blend_dst_a;
  81
  82    GLenum alpha_func;
  83    GLclampf alpha_ref;
  84
  85    GLboolean dither;
  86
  87    GLboolean depth_test, depth_write;
  88    GLenum depth_func;
  89 };
  90
  91 static void
  92 cc_unit_populate_key(struct brw_context *brw, struct brw_cc_unit_key *key)
  93 {
  94    GLcontext *ctx = &brw->intel.ctx;
  95    const unsigned back = ctx->Stencil._BackFace;
  96
  97    memset(key, 0, sizeof(*key));
  98
  99    key->stencil = ctx->Stencil._Enabled;
 100    key->stencil_two_side = ctx->Stencil._TestTwoSide;
 101
 102    if (key->stencil) {
 103       key->stencil_func[0] = ctx->Stencil.Function[0];
 104       key->stencil_fail_op[0] = ctx->Stencil.FailFunc[0];
 105       key->stencil_pass_depth_fail_op[0] = ctx->Stencil.ZFailFunc[0];
 106       key->stencil_pass_depth_pass_op[0] = ctx->Stencil.ZPassFunc[0];
 107       key->stencil_ref[0] = ctx->Stencil.Ref[0];
 108       key->stencil_write_mask[0] = ctx->Stencil.WriteMask[0];
 109       key->stencil_test_mask[0] = ctx->Stencil.ValueMask[0];
 110    }
 111    if (key->stencil_two_side) {
 112       key->stencil_func[1] = ctx->Stencil.Function[back];
 113       key->stencil_fail_op[1] = ctx->Stencil.FailFunc[back];
 114       key->stencil_pass_depth_fail_op[1] = ctx->Stencil.ZFailFunc[back];
 115       key->stencil_pass_depth_pass_op[1] = ctx->Stencil.ZPassFunc[back];
 116       key->stencil_ref[1] = ctx->Stencil.Ref[back];
 117       key->stencil_write_mask[1] = ctx->Stencil.WriteMask[back];
 118       key->stencil_test_mask[1] = ctx->Stencil.ValueMask[back];
 119    }
 120
 121    if (ctx->Color._LogicOpEnabled)
 122       key->logic_op = ctx->Color.LogicOp;
 123    else
 124       key->logic_op = GL_COPY;
 125
 126    key->color_blend = ctx->Color.BlendEnabled;
 127    if (key->color_blend) {
 128       key->blend_eq_rgb = ctx->Color.BlendEquationRGB;
 129       key->blend_eq_a = ctx->Color.BlendEquationA;
 130       key->blend_src_rgb = ctx->Color.BlendSrcRGB;
 131       key->blend_dst_rgb = ctx->Color.BlendDstRGB;
 132       key->blend_src_a = ctx->Color.BlendSrcA;
 133       key->blend_dst_a = ctx->Color.BlendDstA;
 134    }
 135
 136    key->alpha_enabled = ctx->Color.AlphaEnabled;
 137    if (key->alpha_enabled) {
 138       key->alpha_func = ctx->Color.AlphaFunc;
 139       key->alpha_ref = ctx->Color.AlphaRef;
 140    }
 141
 142    key->dither = ctx->Color.DitherFlag;
 143
 144    key->depth_test = ctx->Depth.Test;
 145    if (key->depth_test) {
 146       key->depth_func = ctx->Depth.Func;
 147       key->depth_write = ctx->Depth.Mask;
 148    }
 149 }
 150
 151 /**
 152  * Creates the state cache entry for the given CC unit key.
 153  */
 154 static dri_bo *
 155 cc_unit_create_from_key(struct brw_context *brw, struct brw_cc_unit_key *key)
 156 {
 157    struct brw_cc_unit_state cc;
 158    dri_bo *bo;
 159
 160    memset(&cc, 0, sizeof(cc));
 161
 162    /* _NEW_STENCIL */
 163    if (key->stencil) {
 164       cc.cc0.stencil_enable = 1;
 165       cc.cc0.stencil_func =
 166          intel_translate_compare_func(key->stencil_func[0]);
 167       cc.cc0.stencil_fail_op =
 168          intel_translate_stencil_op(key->stencil_fail_op[0]);
 169       cc.cc0.stencil_pass_depth_fail_op =
 170          intel_translate_stencil_op(key->stencil_pass_depth_fail_op[0]);
 171       cc.cc0.stencil_pass_depth_pass_op =
 172          intel_translate_stencil_op(key->stencil_pass_depth_pass_op[0]);
 173       cc.cc1.stencil_ref = key->stencil_ref[0];
 174       cc.cc1.stencil_write_mask = key->stencil_write_mask[0];
 175       cc.cc1.stencil_test_mask = key->stencil_test_mask[0];
 176
 177       if (key->stencil_two_side) {
 178          cc.cc0.bf_stencil_enable = 1;
 179          cc.cc0.bf_stencil_func =
 180             intel_translate_compare_func(key->stencil_func[1]);
 181          cc.cc0.bf_stencil_fail_op =
 182             intel_translate_stencil_op(key->stencil_fail_op[1]);
 183          cc.cc0.bf_stencil_pass_depth_fail_op =
 184             intel_translate_stencil_op(key->stencil_pass_depth_fail_op[1]);
 185          cc.cc0.bf_stencil_pass_depth_pass_op =
 186             intel_translate_stencil_op(key->stencil_pass_depth_pass_op[1]);
 187          cc.cc1.bf_stencil_ref = key->stencil_ref[1];
 188          cc.cc2.bf_stencil_write_mask = key->stencil_write_mask[1];
 189          cc.cc2.bf_stencil_test_mask = key->stencil_test_mask[1];
 190       }
 191
 192       /* Not really sure about this:
 193        */
 194       if (key->stencil_write_mask[0] ||
 195           (key->stencil_two_side && key->stencil_write_mask[1]))
 196          cc.cc0.stencil_write_enable = 1;
 197    }
 198
 199    /* _NEW_COLOR */
 200    if (key->logic_op != GL_COPY) {
 201       cc.cc2.logicop_enable = 1;
 202       cc.cc5.logicop_func = intel_translate_logic_op(key->logic_op);
 203    } else if (key->color_blend) {
 204       GLenum eqRGB = key->blend_eq_rgb;
 205       GLenum eqA = key->blend_eq_a;
 206       GLenum srcRGB = key->blend_src_rgb;
 207       GLenum dstRGB = key->blend_dst_rgb;
 208       GLenum srcA = key->blend_src_a;
 209       GLenum dstA = key->blend_dst_a;
 210
 211       if (eqRGB == GL_MIN || eqRGB == GL_MAX) {
 212          srcRGB = dstRGB = GL_ONE;
 213       }
 214
 215       if (eqA == GL_MIN || eqA == GL_MAX) {
 216          srcA = dstA = GL_ONE;
 217       }
 218
 219       cc.cc6.dest_blend_factor = brw_translate_blend_factor(dstRGB);
 220       cc.cc6.src_blend_factor = brw_translate_blend_factor(srcRGB);
 221       cc.cc6.blend_function = brw_translate_blend_equation(eqRGB);
 222
 223       cc.cc5.ia_dest_blend_factor = brw_translate_blend_factor(dstA);
 224       cc.cc5.ia_src_blend_factor = brw_translate_blend_factor(srcA);
 225       cc.cc5.ia_blend_function = brw_translate_blend_equation(eqA);
 226
 227       cc.cc3.blend_enable = 1;
 228       cc.cc3.ia_blend_enable = (srcA != srcRGB ||
 229                                 dstA != dstRGB ||
 230                                 eqA != eqRGB);
 231    }
 232
 233    if (key->alpha_enabled) {
 234       cc.cc3.alpha_test = 1;
 235       cc.cc3.alpha_test_func = intel_translate_compare_func(key->alpha_func);
 236       cc.cc3.alpha_test_format = BRW_ALPHATEST_FORMAT_UNORM8;
 237
 238       UNCLAMPED_FLOAT_TO_UBYTE(cc.cc7.alpha_ref.ub[0], key->alpha_ref);
 239    }
 240
 241    if (key->dither) {
 242       cc.cc5.dither_enable = 1;
 243       cc.cc6.y_dither_offset = 0;
 244       cc.cc6.x_dither_offset = 0;
 245    }
 246
 247    /* _NEW_DEPTH */
 248    if (key->depth_test) {
 249       cc.cc2.depth_test = 1;
 250       cc.cc2.depth_test_function = intel_translate_compare_func(key->depth_func);
 251       cc.cc2.depth_write_enable = key->depth_write;
 252    }
 253
 254    /* CACHE_NEW_CC_VP */
 255    cc.cc4.cc_viewport_state_offset = brw->cc.vp_bo->offset >> 5; /* reloc */
 256
 257    if (INTEL_DEBUG & DEBUG_STATS)
 258       cc.cc5.statistics_enable = 1;
 259
 260    bo = brw_upload_cache(&brw->cache, BRW_CC_UNIT,
 261                          key, sizeof(*key),
 262                          &brw->cc.vp_bo, 1,
 263                          &cc, sizeof(cc),
 264                          NULL, NULL);
 265
 266    /* Emit CC viewport relocation */
 267    dri_bo_emit_reloc(bo,
 268                      I915_GEM_DOMAIN_INSTRUCTION,
 269                      0,
 270                      0,
 271                      offsetof(struct brw_cc_unit_state, cc4),
 272                      brw->cc.vp_bo);
 273
 274    return bo;
 275 }
 276
 277 static void prepare_cc_unit( struct brw_context *brw )
 278 {
 279    struct brw_cc_unit_key key;
 280
 281    cc_unit_populate_key(brw, &key);
 282
 283    dri_bo_unreference(brw->cc.state_bo);
 284    brw->cc.state_bo = brw_search_cache(&brw->cache, BRW_CC_UNIT,
 285                                        &key, sizeof(key),
 286                                        &brw->cc.vp_bo, 1,
 287                                        NULL);
 288
 289    if (brw->cc.state_bo == NULL)
 290       brw->cc.state_bo = cc_unit_create_from_key(brw, &key);
 291 }
 292
 293 const struct brw_tracked_state brw_cc_unit = {
 294    .dirty = {
 295       .mesa = _NEW_STENCIL | _NEW_COLOR | _NEW_DEPTH,
 296       .brw = 0,
 297       .cache = CACHE_NEW_CC_VP
 298    },
 299    .prepare = prepare_cc_unit,
 300 };
 301
 302
 303