src/mesa/drivers/dri/i965/gen6_cc.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 "brw_context.h"
  29 #include "brw_state.h"
  30 #include "brw_defines.h"
  31 #include "brw_util.h"
  32 #include "intel_batchbuffer.h"
  33 #include "main/macros.h"
  34
  35 static void
  36 prepare_blend_state(struct brw_context *brw)
  37 {
  38    struct gl_context *ctx = &brw->intel.ctx;
  39    struct gen6_blend_state *blend;
  40    int b;
  41    int nr_draw_buffers = ctx->DrawBuffer->_NumColorDrawBuffers;
  42    int size = sizeof(*blend) * nr_draw_buffers;
  43
  44    blend = brw_state_batch(brw, size, 64, &brw->cc.blend_state_offset);
  45
  46    memset(blend, 0, size);
  47
  48    for (b = 0; b < nr_draw_buffers; b++) {
  49       /* _NEW_COLOR */
  50       if (ctx->Color._LogicOpEnabled && ctx->Color.LogicOp != GL_COPY) {
  51          blend[b].blend1.logic_op_enable = 1;
  52          blend[b].blend1.logic_op_func =
  53             intel_translate_logic_op(ctx->Color.LogicOp);
  54       } else if (ctx->Color.BlendEnabled & (1 << b)) {
  55          GLenum eqRGB = ctx->Color.Blend[0].EquationRGB;
  56          GLenum eqA = ctx->Color.Blend[0].EquationA;
  57          GLenum srcRGB = ctx->Color.Blend[0].SrcRGB;
  58          GLenum dstRGB = ctx->Color.Blend[0].DstRGB;
  59          GLenum srcA = ctx->Color.Blend[0].SrcA;
  60          GLenum dstA = ctx->Color.Blend[0].DstA;
  61
  62          if (eqRGB == GL_MIN || eqRGB == GL_MAX) {
  63             srcRGB = dstRGB = GL_ONE;
  64          }
  65
  66          if (eqA == GL_MIN || eqA == GL_MAX) {
  67             srcA = dstA = GL_ONE;
  68          }
  69
  70          blend[b].blend0.dest_blend_factor = brw_translate_blend_factor(dstRGB);
  71          blend[b].blend0.source_blend_factor = brw_translate_blend_factor(srcRGB);
  72          blend[b].blend0.blend_func = brw_translate_blend_equation(eqRGB);
  73
  74          blend[b].blend0.ia_dest_blend_factor = brw_translate_blend_factor(dstA);
  75          blend[b].blend0.ia_source_blend_factor = brw_translate_blend_factor(srcA);
  76          blend[b].blend0.ia_blend_func = brw_translate_blend_equation(eqA);
  77
  78          blend[b].blend0.blend_enable = 1;
  79          blend[b].blend0.ia_blend_enable = (srcA != srcRGB ||
  80                                          dstA != dstRGB ||
  81                                          eqA != eqRGB);
  82       }
  83
  84
  85       /* _NEW_COLOR */
  86       if (ctx->Color.AlphaEnabled) {
  87          blend[b].blend1.alpha_test_enable = 1;
  88          blend[b].blend1.alpha_test_func =
  89             intel_translate_compare_func(ctx->Color.AlphaFunc);
  90
  91       }
  92
  93       /* _NEW_COLOR */
  94       if (ctx->Color.DitherFlag) {
  95          blend[b].blend1.dither_enable = 1;
  96          blend[b].blend1.y_dither_offset = 0;
  97          blend[b].blend1.x_dither_offset = 0;
  98       }
  99
 100       blend[b].blend1.write_disable_r = !ctx->Color.ColorMask[b][0];
 101       blend[b].blend1.write_disable_g = !ctx->Color.ColorMask[b][1];
 102       blend[b].blend1.write_disable_b = !ctx->Color.ColorMask[b][2];
 103       blend[b].blend1.write_disable_a = !ctx->Color.ColorMask[b][3];
 104    }
 105
 106    brw->state.dirty.cache |= CACHE_NEW_BLEND_STATE;
 107 }
 108
 109 const struct brw_tracked_state gen6_blend_state = {
 110    .dirty = {
 111       .mesa = _NEW_COLOR,
 112       .brw = BRW_NEW_BATCH,
 113       .cache = 0,
 114    },
 115    .prepare = prepare_blend_state,
 116 };
 117
 118 static void
 119 gen6_prepare_color_calc_state(struct brw_context *brw)
 120 {
 121    struct gl_context *ctx = &brw->intel.ctx;
 122    struct gen6_color_calc_state *cc;
 123
 124    cc = brw_state_batch(brw, sizeof(*cc), 64, &brw->cc.state_offset);
 125    memset(cc, 0, sizeof(*cc));
 126
 127    /* _NEW_COLOR */
 128    cc->cc0.alpha_test_format = BRW_ALPHATEST_FORMAT_UNORM8;
 129    UNCLAMPED_FLOAT_TO_UBYTE(cc->cc1.alpha_ref_fi.ui, ctx->Color.AlphaRef);
 130
 131    /* _NEW_STENCIL */
 132    cc->cc0.stencil_ref = ctx->Stencil.Ref[0];
 133    cc->cc0.bf_stencil_ref = ctx->Stencil.Ref[ctx->Stencil._BackFace];
 134
 135    /* _NEW_COLOR */
 136    cc->constant_r = ctx->Color.BlendColorUnclamped[0];
 137    cc->constant_g = ctx->Color.BlendColorUnclamped[1];
 138    cc->constant_b = ctx->Color.BlendColorUnclamped[2];
 139    cc->constant_a = ctx->Color.BlendColorUnclamped[3];
 140
 141    brw->state.dirty.cache |= CACHE_NEW_COLOR_CALC_STATE;
 142 }
 143
 144 const struct brw_tracked_state gen6_color_calc_state = {
 145    .dirty = {
 146       .mesa = _NEW_COLOR | _NEW_STENCIL,
 147       .brw = BRW_NEW_BATCH,
 148       .cache = 0,
 149    },
 150    .prepare = gen6_prepare_color_calc_state,
 151 };
 152
 153 static void upload_cc_state_pointers(struct brw_context *brw)
 154 {
 155    struct intel_context *intel = &brw->intel;
 156
 157    BEGIN_BATCH(4);
 158    OUT_BATCH(_3DSTATE_CC_STATE_POINTERS << 16 | (4 - 2));
 159    OUT_RELOC(intel->batch.bo, I915_GEM_DOMAIN_INSTRUCTION, 0,
 160              brw->cc.blend_state_offset | 1);
 161    OUT_RELOC(brw->cc.depth_stencil_state_bo, I915_GEM_DOMAIN_INSTRUCTION, 0, 1);
 162    OUT_RELOC(intel->batch.bo, I915_GEM_DOMAIN_INSTRUCTION, 0,
 163              brw->cc.state_offset | 1);
 164    ADVANCE_BATCH();
 165 }
 166
 167
 168 static void prepare_cc_state_pointers(struct brw_context *brw)
 169 {
 170    brw_add_validated_bo(brw, brw->cc.depth_stencil_state_bo);
 171 }
 172
 173 const struct brw_tracked_state gen6_cc_state_pointers = {
 174    .dirty = {
 175       .mesa = 0,
 176       .brw = BRW_NEW_BATCH,
 177       .cache = (CACHE_NEW_BLEND_STATE |
 178                 CACHE_NEW_COLOR_CALC_STATE |
 179                 CACHE_NEW_DEPTH_STENCIL_STATE)
 180    },
 181    .prepare = prepare_cc_state_pointers,
 182    .emit = upload_cc_state_pointers,
 183 };