1 /*
2 * Copyright 2003 VMware, Inc.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial portions
15 * of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
21 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
22 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
23 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26 #include "main/context.h"
27 #include "main/macros.h"
28 #include "main/enums.h"
29 #include "main/dd.h"
30
31 #include "intel_screen.h"
32 #include "brw_context.h"
33 #include "brw_defines.h"
34
35 int
intel_translate_shadow_compare_func(GLenum func)36 intel_translate_shadow_compare_func(GLenum func)
37 {
38 /* GL specifies the result of shadow comparisons as:
39 * 1 if ref <op> texel,
40 * 0 otherwise.
41 *
42 * The hardware does:
43 * 0 if texel <op> ref,
44 * 1 otherwise.
45 *
46 * So, these look a bit strange because there's both a negation
47 * and swapping of the arguments involved.
48 */
49 switch (func) {
50 case GL_NEVER:
51 return BRW_COMPAREFUNCTION_ALWAYS;
52 case GL_LESS:
53 return BRW_COMPAREFUNCTION_LEQUAL;
54 case GL_LEQUAL:
55 return BRW_COMPAREFUNCTION_LESS;
56 case GL_GREATER:
57 return BRW_COMPAREFUNCTION_GEQUAL;
58 case GL_GEQUAL:
59 return BRW_COMPAREFUNCTION_GREATER;
60 case GL_NOTEQUAL:
61 return BRW_COMPAREFUNCTION_EQUAL;
62 case GL_EQUAL:
63 return BRW_COMPAREFUNCTION_NOTEQUAL;
64 case GL_ALWAYS:
65 return BRW_COMPAREFUNCTION_NEVER;
66 }
67
68 unreachable("Invalid shadow comparison function.");
69 }
70
71 int
intel_translate_compare_func(GLenum func)72 intel_translate_compare_func(GLenum func)
73 {
74 switch (func) {
75 case GL_NEVER:
76 return BRW_COMPAREFUNCTION_NEVER;
77 case GL_LESS:
78 return BRW_COMPAREFUNCTION_LESS;
79 case GL_LEQUAL:
80 return BRW_COMPAREFUNCTION_LEQUAL;
81 case GL_GREATER:
82 return BRW_COMPAREFUNCTION_GREATER;
83 case GL_GEQUAL:
84 return BRW_COMPAREFUNCTION_GEQUAL;
85 case GL_NOTEQUAL:
86 return BRW_COMPAREFUNCTION_NOTEQUAL;
87 case GL_EQUAL:
88 return BRW_COMPAREFUNCTION_EQUAL;
89 case GL_ALWAYS:
90 return BRW_COMPAREFUNCTION_ALWAYS;
91 }
92
93 unreachable("Invalid comparison function.");
94 }
95
96 int
intel_translate_stencil_op(GLenum op)97 intel_translate_stencil_op(GLenum op)
98 {
99 switch (op) {
100 case GL_KEEP:
101 return BRW_STENCILOP_KEEP;
102 case GL_ZERO:
103 return BRW_STENCILOP_ZERO;
104 case GL_REPLACE:
105 return BRW_STENCILOP_REPLACE;
106 case GL_INCR:
107 return BRW_STENCILOP_INCRSAT;
108 case GL_DECR:
109 return BRW_STENCILOP_DECRSAT;
110 case GL_INCR_WRAP:
111 return BRW_STENCILOP_INCR;
112 case GL_DECR_WRAP:
113 return BRW_STENCILOP_DECR;
114 case GL_INVERT:
115 return BRW_STENCILOP_INVERT;
116 default:
117 return BRW_STENCILOP_ZERO;
118 }
119 }
120
121 int
intel_translate_logic_op(GLenum opcode)122 intel_translate_logic_op(GLenum opcode)
123 {
124 switch (opcode) {
125 case GL_CLEAR:
126 return BRW_LOGICOPFUNCTION_CLEAR;
127 case GL_AND:
128 return BRW_LOGICOPFUNCTION_AND;
129 case GL_AND_REVERSE:
130 return BRW_LOGICOPFUNCTION_AND_REVERSE;
131 case GL_COPY:
132 return BRW_LOGICOPFUNCTION_COPY;
133 case GL_COPY_INVERTED:
134 return BRW_LOGICOPFUNCTION_COPY_INVERTED;
135 case GL_AND_INVERTED:
136 return BRW_LOGICOPFUNCTION_AND_INVERTED;
137 case GL_NOOP:
138 return BRW_LOGICOPFUNCTION_NOOP;
139 case GL_XOR:
140 return BRW_LOGICOPFUNCTION_XOR;
141 case GL_OR:
142 return BRW_LOGICOPFUNCTION_OR;
143 case GL_OR_INVERTED:
144 return BRW_LOGICOPFUNCTION_OR_INVERTED;
145 case GL_NOR:
146 return BRW_LOGICOPFUNCTION_NOR;
147 case GL_EQUIV:
148 return BRW_LOGICOPFUNCTION_EQUIV;
149 case GL_INVERT:
150 return BRW_LOGICOPFUNCTION_INVERT;
151 case GL_OR_REVERSE:
152 return BRW_LOGICOPFUNCTION_OR_REVERSE;
153 case GL_NAND:
154 return BRW_LOGICOPFUNCTION_NAND;
155 case GL_SET:
156 return BRW_LOGICOPFUNCTION_SET;
157 default:
158 return BRW_LOGICOPFUNCTION_SET;
159 }
160 }
161