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
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  * @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
CanonicalizeBLEND_COMPILE_STATE94     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