1/****************************************************************************
2 * Copyright (C) 2014-2015 Intel Corporation.   All Rights Reserved.
3 *
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5 * copy of this software and associated documentation files (the "Software"),
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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
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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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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
35struct 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
48enum ALPHA_TEST_FORMAT
49{
50    ALPHA_TEST_UNORM8,
51    ALPHA_TEST_FLOAT32
52};
53
54//////////////////////////////////////////////////////////////////////////
55/// BLEND_DESC
56//////////////////////////////////////////////////////////////////////////
57struct 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//////////////////////////////////////////////////////////////////////////
79struct 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