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      1 /****************************************************************************
      2 * Copyright (C) 2014-2015 Intel Corporation.   All Rights Reserved.
      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
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      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,
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     21 * IN THE SOFTWARE.
     22 *
     23 * @file blend_jit.h
     24 *
     25 * @brief Definition of the blend jitter
     26 *
     27 * Notes:
     28 *
     29 ******************************************************************************/
     30 #pragma once
     31 
     32 #include "common/formats.h"
     33 #include "core/state.h"
     34 
     35 struct RENDER_TARGET_BLEND_COMPILE_STATE
     36 {
     37     bool blendEnable;
     38     bool logicOpEnable;
     39     SWR_BLEND_FACTOR sourceAlphaBlendFactor;
     40     SWR_BLEND_FACTOR destAlphaBlendFactor;
     41     SWR_BLEND_FACTOR sourceBlendFactor;
     42     SWR_BLEND_FACTOR destBlendFactor;
     43     SWR_BLEND_OP colorBlendFunc;
     44     SWR_BLEND_OP alphaBlendFunc;
     45     SWR_LOGIC_OP logicOpFunc;
     46 };
     47 
     48 enum ALPHA_TEST_FORMAT
     49 {
     50     ALPHA_TEST_UNORM8,
     51     ALPHA_TEST_FLOAT32
     52 };
     53 
     54 //////////////////////////////////////////////////////////////////////////
     55 /// BLEND_DESC
     56 //////////////////////////////////////////////////////////////////////////
     57 struct BLEND_DESC
     58 {
     59     union
     60     {
     61         struct
     62         {
     63             uint32_t            alphaTestEnable: 1;
     64             uint32_t            independentAlphaBlendEnable: 1;
     65             uint32_t            alphaToCoverageEnable: 1;
     66             uint32_t            oMaskEnable:1;
     67             uint32_t            inputCoverageEnable:1;
     68             uint32_t            sampleMaskEnable:1;
     69             uint32_t            numSamples:5;
     70             uint32_t            _reserved : 21;
     71         };
     72         uint32_t bits;
     73     };
     74 };
     75 #define BLEND_ENABLE_MASK 0x3D // a2c | oMaskEnable | inputCoverageEnable | sampleMaskEnable
     76 //////////////////////////////////////////////////////////////////////////
     77 /// State required for blend jit
     78 //////////////////////////////////////////////////////////////////////////
     79 struct BLEND_COMPILE_STATE
     80 {
     81     SWR_FORMAT format;          // format of render target being blended
     82     RENDER_TARGET_BLEND_COMPILE_STATE blendState;
     83     BLEND_DESC desc;
     84 
     85     SWR_ZFUNCTION alphaTestFunction;
     86     ALPHA_TEST_FORMAT alphaTestFormat;
     87 
     88     bool operator==(const BLEND_COMPILE_STATE& other) const
     89     {
     90         return memcmp(this, &other, sizeof(BLEND_COMPILE_STATE)) == 0;
     91     }
     92 
     93     // Canonicalize state to reduce unnecessary JIT compiles
     94     void Canonicalize()
     95     {
     96         if (!desc.alphaTestEnable)
     97         {
     98             alphaTestFormat = (ALPHA_TEST_FORMAT)0;
     99             alphaTestFunction = (SWR_ZFUNCTION)0;
    100         }
    101 
    102         if (!blendState.blendEnable)
    103         {
    104             blendState.sourceAlphaBlendFactor = (SWR_BLEND_FACTOR)0;
    105             blendState.destAlphaBlendFactor = (SWR_BLEND_FACTOR)0;
    106             blendState.sourceBlendFactor = (SWR_BLEND_FACTOR)0;
    107             blendState.destBlendFactor = (SWR_BLEND_FACTOR)0;
    108             blendState.colorBlendFunc = (SWR_BLEND_OP)0;
    109             blendState.alphaBlendFunc = (SWR_BLEND_OP)0;
    110         }
    111 
    112         if (!blendState.logicOpEnable)
    113         {
    114             blendState.logicOpFunc = (SWR_LOGIC_OP)0;
    115         }
    116 
    117         if (!blendState.blendEnable && !blendState.logicOpEnable)
    118         {
    119             format = (SWR_FORMAT)0;
    120         }
    121 
    122         if (!desc.independentAlphaBlendEnable)
    123         {
    124             blendState.sourceAlphaBlendFactor = (SWR_BLEND_FACTOR)0;
    125             blendState.destAlphaBlendFactor = (SWR_BLEND_FACTOR)0;
    126             blendState.alphaBlendFunc = (SWR_BLEND_OP)0;
    127         }
    128     }
    129 };
    130