1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 2012-2013 LunarG, Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 *
24 * Authors:
25 * Chia-I Wu <olv@lunarg.com>
26 */
27
28 #ifndef ILO_FORMAT_H
29 #define ILO_FORMAT_H
30
31 #include "genhw/genhw.h"
32
33 #include "ilo_common.h"
34
35 bool
36 ilo_format_support_vb(const struct ilo_dev *dev,
37 enum pipe_format format);
38
39 bool
40 ilo_format_support_sol(const struct ilo_dev *dev,
41 enum pipe_format format);
42
43 bool
44 ilo_format_support_sampler(const struct ilo_dev *dev,
45 enum pipe_format format);
46
47 bool
48 ilo_format_support_rt(const struct ilo_dev *dev,
49 enum pipe_format format);
50
51 bool
52 ilo_format_support_zs(const struct ilo_dev *dev,
53 enum pipe_format format);
54
55 int
56 ilo_format_translate_color(const struct ilo_dev *dev,
57 enum pipe_format format);
58
59 /**
60 * Translate a pipe format to a hardware surface format suitable for
61 * the given purpose. Return -1 on errors.
62 *
63 * This is an inline function not only for performance reasons. There are
64 * caveats that the callers should be aware of before calling this function.
65 */
66 static inline int
ilo_format_translate(const struct ilo_dev * dev,enum pipe_format format,unsigned bind)67 ilo_format_translate(const struct ilo_dev *dev,
68 enum pipe_format format, unsigned bind)
69 {
70 switch (bind) {
71 case PIPE_BIND_RENDER_TARGET:
72 /*
73 * Some RGBX formats are not supported as render target formats. But we
74 * can use their RGBA counterparts and force the destination alpha to be
75 * one when blending is enabled.
76 */
77 switch (format) {
78 case PIPE_FORMAT_B8G8R8X8_UNORM:
79 return GEN6_FORMAT_B8G8R8A8_UNORM;
80 default:
81 return ilo_format_translate_color(dev, format);
82 }
83 break;
84 case PIPE_BIND_SAMPLER_VIEW:
85 /*
86 * For depth formats, we want the depth values to be returned as R
87 * values. But we assume in many places that the depth values are
88 * returned as I values (util_make_fragment_tex_shader_writedepth() is
89 * one such example). We have to live with that at least for now.
90 *
91 * For ETC1 format, the texture data will be decompressed before being
92 * written to the bo. See tex_staging_sys_convert_write().
93 */
94 switch (format) {
95 case PIPE_FORMAT_Z16_UNORM:
96 return GEN6_FORMAT_I16_UNORM;
97 case PIPE_FORMAT_Z32_FLOAT:
98 return GEN6_FORMAT_I32_FLOAT;
99 case PIPE_FORMAT_Z24X8_UNORM:
100 case PIPE_FORMAT_Z24_UNORM_S8_UINT:
101 return GEN6_FORMAT_I24X8_UNORM;
102 case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
103 return GEN6_FORMAT_I32X32_FLOAT;
104 case PIPE_FORMAT_ETC1_RGB8:
105 return GEN6_FORMAT_R8G8B8X8_UNORM;
106 default:
107 return ilo_format_translate_color(dev, format);
108 }
109 break;
110 case PIPE_BIND_VERTEX_BUFFER:
111 if (ilo_dev_gen(dev) >= ILO_GEN(7.5))
112 return ilo_format_translate_color(dev, format);
113
114 /*
115 * Some 3-component formats are not supported as vertex element formats.
116 * But since we move between vertices using vb->stride, we should be
117 * good to use their 4-component counterparts if we force the W
118 * component to be one. The only exception is that the vb boundary
119 * check for the last vertex may fail.
120 */
121 switch (format) {
122 case PIPE_FORMAT_R16G16B16_FLOAT:
123 return GEN6_FORMAT_R16G16B16A16_FLOAT;
124 case PIPE_FORMAT_R16G16B16_UINT:
125 return GEN6_FORMAT_R16G16B16A16_UINT;
126 case PIPE_FORMAT_R16G16B16_SINT:
127 return GEN6_FORMAT_R16G16B16A16_SINT;
128 case PIPE_FORMAT_R8G8B8_UINT:
129 return GEN6_FORMAT_R8G8B8A8_UINT;
130 case PIPE_FORMAT_R8G8B8_SINT:
131 return GEN6_FORMAT_R8G8B8A8_SINT;
132 default:
133 return ilo_format_translate_color(dev, format);
134 }
135 break;
136 case PIPE_BIND_STREAM_OUTPUT:
137 return ilo_format_translate_color(dev, format);
138 break;
139 default:
140 assert(!"cannot translate format");
141 break;
142 }
143
144 return -1;
145 }
146
147 static inline int
ilo_format_translate_render(const struct ilo_dev * dev,enum pipe_format format)148 ilo_format_translate_render(const struct ilo_dev *dev,
149 enum pipe_format format)
150 {
151 return ilo_format_translate(dev, format, PIPE_BIND_RENDER_TARGET);
152 }
153
154 static inline int
ilo_format_translate_texture(const struct ilo_dev * dev,enum pipe_format format)155 ilo_format_translate_texture(const struct ilo_dev *dev,
156 enum pipe_format format)
157 {
158 return ilo_format_translate(dev, format, PIPE_BIND_SAMPLER_VIEW);
159 }
160
161 static inline int
ilo_format_translate_vertex(const struct ilo_dev * dev,enum pipe_format format)162 ilo_format_translate_vertex(const struct ilo_dev *dev,
163 enum pipe_format format)
164 {
165 return ilo_format_translate(dev, format, PIPE_BIND_VERTEX_BUFFER);
166 }
167
168 static inline enum gen_depth_format
ilo_format_translate_depth(const struct ilo_dev * dev,enum pipe_format format)169 ilo_format_translate_depth(const struct ilo_dev *dev,
170 enum pipe_format format)
171 {
172 if (ilo_dev_gen(dev) >= ILO_GEN(7)) {
173 switch (format) {
174 case PIPE_FORMAT_Z32_FLOAT:
175 return GEN6_ZFORMAT_D32_FLOAT;
176 case PIPE_FORMAT_Z24X8_UNORM:
177 return GEN6_ZFORMAT_D24_UNORM_X8_UINT;
178 case PIPE_FORMAT_Z16_UNORM:
179 return GEN6_ZFORMAT_D16_UNORM;
180 default:
181 assert(!"unknown depth format");
182 return GEN6_ZFORMAT_D32_FLOAT;
183 }
184 } else {
185 switch (format) {
186 case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
187 return GEN6_ZFORMAT_D32_FLOAT_S8X24_UINT;
188 case PIPE_FORMAT_Z32_FLOAT:
189 return GEN6_ZFORMAT_D32_FLOAT;
190 case PIPE_FORMAT_Z24_UNORM_S8_UINT:
191 return GEN6_ZFORMAT_D24_UNORM_S8_UINT;
192 case PIPE_FORMAT_Z24X8_UNORM:
193 return GEN6_ZFORMAT_D24_UNORM_X8_UINT;
194 case PIPE_FORMAT_Z16_UNORM:
195 return GEN6_ZFORMAT_D16_UNORM;
196 default:
197 assert(!"unknown depth format");
198 return GEN6_ZFORMAT_D32_FLOAT;
199 }
200 }
201 }
202
203 #endif /* ILO_FORMAT_H */
204