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
35int
36intel_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
71int
72intel_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
96int
97intel_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
121int
122intel_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