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iris: Properly support alpha and luminance-alpha formats
[mesa.git] / src / gallium / drivers / iris / iris_formats.c
1 /*
2 * Copyright © 2017 Intel Corporation
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 shall be included
12 * in all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20 * DEALINGS IN THE SOFTWARE.
21 */
22
23 /**
24 * @file iris_formats.c
25 *
26 * Converts Gallium formats (PIPE_FORMAT_*) to hardware ones (ISL_FORMAT_*).
27 * Provides information about which formats support what features.
28 */
29
30 #include "util/bitscan.h"
31 #include "util/macros.h"
32 #include "util/u_format.h"
33
34 #include "iris_resource.h"
35 #include "iris_screen.h"
36
37 static enum isl_format
38 iris_isl_format_for_pipe_format(enum pipe_format pf)
39 {
40 static const enum isl_format table[PIPE_FORMAT_COUNT] = {
41 [0 ... PIPE_FORMAT_COUNT-1] = ISL_FORMAT_UNSUPPORTED,
42
43 [PIPE_FORMAT_B8G8R8A8_UNORM] = ISL_FORMAT_B8G8R8A8_UNORM,
44 [PIPE_FORMAT_B8G8R8X8_UNORM] = ISL_FORMAT_B8G8R8X8_UNORM,
45 [PIPE_FORMAT_B5G5R5A1_UNORM] = ISL_FORMAT_B5G5R5A1_UNORM,
46 [PIPE_FORMAT_B4G4R4A4_UNORM] = ISL_FORMAT_B4G4R4A4_UNORM,
47 [PIPE_FORMAT_B5G6R5_UNORM] = ISL_FORMAT_B5G6R5_UNORM,
48 [PIPE_FORMAT_R10G10B10A2_UNORM] = ISL_FORMAT_R10G10B10A2_UNORM,
49
50 [PIPE_FORMAT_Z16_UNORM] = ISL_FORMAT_R16_UNORM,
51 [PIPE_FORMAT_Z32_UNORM] = ISL_FORMAT_R32_UNORM,
52 [PIPE_FORMAT_Z32_FLOAT] = ISL_FORMAT_R32_FLOAT,
53
54 /* We translate the combined depth/stencil formats to depth only here */
55 [PIPE_FORMAT_Z24_UNORM_S8_UINT] = ISL_FORMAT_R24_UNORM_X8_TYPELESS,
56 [PIPE_FORMAT_Z24X8_UNORM] = ISL_FORMAT_R24_UNORM_X8_TYPELESS,
57 [PIPE_FORMAT_Z32_FLOAT_S8X24_UINT] = ISL_FORMAT_R32_FLOAT,
58
59 [PIPE_FORMAT_S8_UINT] = ISL_FORMAT_R8_UINT,
60 [PIPE_FORMAT_X24S8_UINT] = ISL_FORMAT_R8_UINT,
61 [PIPE_FORMAT_X32_S8X24_UINT] = ISL_FORMAT_R8_UINT,
62
63 [PIPE_FORMAT_R64_FLOAT] = ISL_FORMAT_R64_FLOAT,
64 [PIPE_FORMAT_R64G64_FLOAT] = ISL_FORMAT_R64G64_FLOAT,
65 [PIPE_FORMAT_R64G64B64_FLOAT] = ISL_FORMAT_R64G64B64_FLOAT,
66 [PIPE_FORMAT_R64G64B64A64_FLOAT] = ISL_FORMAT_R64G64B64A64_FLOAT,
67 [PIPE_FORMAT_R32_FLOAT] = ISL_FORMAT_R32_FLOAT,
68 [PIPE_FORMAT_R32G32_FLOAT] = ISL_FORMAT_R32G32_FLOAT,
69 [PIPE_FORMAT_R32G32B32_FLOAT] = ISL_FORMAT_R32G32B32_FLOAT,
70 [PIPE_FORMAT_R32G32B32A32_FLOAT] = ISL_FORMAT_R32G32B32A32_FLOAT,
71 [PIPE_FORMAT_R32_UNORM] = ISL_FORMAT_R32_UNORM,
72 [PIPE_FORMAT_R32G32_UNORM] = ISL_FORMAT_R32G32_UNORM,
73 [PIPE_FORMAT_R32G32B32_UNORM] = ISL_FORMAT_R32G32B32_UNORM,
74 [PIPE_FORMAT_R32G32B32A32_UNORM] = ISL_FORMAT_R32G32B32A32_UNORM,
75 [PIPE_FORMAT_R32_USCALED] = ISL_FORMAT_R32_USCALED,
76 [PIPE_FORMAT_R32G32_USCALED] = ISL_FORMAT_R32G32_USCALED,
77 [PIPE_FORMAT_R32G32B32_USCALED] = ISL_FORMAT_R32G32B32_USCALED,
78 [PIPE_FORMAT_R32G32B32A32_USCALED] = ISL_FORMAT_R32G32B32A32_USCALED,
79 [PIPE_FORMAT_R32_SNORM] = ISL_FORMAT_R32_SNORM,
80 [PIPE_FORMAT_R32G32_SNORM] = ISL_FORMAT_R32G32_SNORM,
81 [PIPE_FORMAT_R32G32B32_SNORM] = ISL_FORMAT_R32G32B32_SNORM,
82 [PIPE_FORMAT_R32G32B32A32_SNORM] = ISL_FORMAT_R32G32B32A32_SNORM,
83 [PIPE_FORMAT_R32_SSCALED] = ISL_FORMAT_R32_SSCALED,
84 [PIPE_FORMAT_R32G32_SSCALED] = ISL_FORMAT_R32G32_SSCALED,
85 [PIPE_FORMAT_R32G32B32_SSCALED] = ISL_FORMAT_R32G32B32_SSCALED,
86 [PIPE_FORMAT_R32G32B32A32_SSCALED] = ISL_FORMAT_R32G32B32A32_SSCALED,
87 [PIPE_FORMAT_R16_UNORM] = ISL_FORMAT_R16_UNORM,
88 [PIPE_FORMAT_R16G16_UNORM] = ISL_FORMAT_R16G16_UNORM,
89 [PIPE_FORMAT_R16G16B16_UNORM] = ISL_FORMAT_R16G16B16_UNORM,
90 [PIPE_FORMAT_R16G16B16A16_UNORM] = ISL_FORMAT_R16G16B16A16_UNORM,
91 [PIPE_FORMAT_R16_USCALED] = ISL_FORMAT_R16_USCALED,
92 [PIPE_FORMAT_R16G16_USCALED] = ISL_FORMAT_R16G16_USCALED,
93 [PIPE_FORMAT_R16G16B16_USCALED] = ISL_FORMAT_R16G16B16_USCALED,
94 [PIPE_FORMAT_R16G16B16A16_USCALED] = ISL_FORMAT_R16G16B16A16_USCALED,
95 [PIPE_FORMAT_R16_SNORM] = ISL_FORMAT_R16_SNORM,
96 [PIPE_FORMAT_R16G16_SNORM] = ISL_FORMAT_R16G16_SNORM,
97 [PIPE_FORMAT_R16G16B16_SNORM] = ISL_FORMAT_R16G16B16_SNORM,
98 [PIPE_FORMAT_R16G16B16A16_SNORM] = ISL_FORMAT_R16G16B16A16_SNORM,
99 [PIPE_FORMAT_R16_SSCALED] = ISL_FORMAT_R16_SSCALED,
100 [PIPE_FORMAT_R16G16_SSCALED] = ISL_FORMAT_R16G16_SSCALED,
101 [PIPE_FORMAT_R16G16B16_SSCALED] = ISL_FORMAT_R16G16B16_SSCALED,
102 [PIPE_FORMAT_R16G16B16A16_SSCALED] = ISL_FORMAT_R16G16B16A16_SSCALED,
103 [PIPE_FORMAT_R8_UNORM] = ISL_FORMAT_R8_UNORM,
104 [PIPE_FORMAT_R8G8_UNORM] = ISL_FORMAT_R8G8_UNORM,
105 [PIPE_FORMAT_R8G8B8_UNORM] = ISL_FORMAT_R8G8B8_UNORM,
106 [PIPE_FORMAT_R8G8B8A8_UNORM] = ISL_FORMAT_R8G8B8A8_UNORM,
107 [PIPE_FORMAT_R8_USCALED] = ISL_FORMAT_R8_USCALED,
108 [PIPE_FORMAT_R8G8_USCALED] = ISL_FORMAT_R8G8_USCALED,
109 [PIPE_FORMAT_R8G8B8_USCALED] = ISL_FORMAT_R8G8B8_USCALED,
110 [PIPE_FORMAT_R8G8B8A8_USCALED] = ISL_FORMAT_R8G8B8A8_USCALED,
111 [PIPE_FORMAT_R8_SNORM] = ISL_FORMAT_R8_SNORM,
112 [PIPE_FORMAT_R8G8_SNORM] = ISL_FORMAT_R8G8_SNORM,
113 [PIPE_FORMAT_R8G8B8_SNORM] = ISL_FORMAT_R8G8B8_SNORM,
114 [PIPE_FORMAT_R8G8B8A8_SNORM] = ISL_FORMAT_R8G8B8A8_SNORM,
115 [PIPE_FORMAT_R8_SSCALED] = ISL_FORMAT_R8_SSCALED,
116 [PIPE_FORMAT_R8G8_SSCALED] = ISL_FORMAT_R8G8_SSCALED,
117 [PIPE_FORMAT_R8G8B8_SSCALED] = ISL_FORMAT_R8G8B8_SSCALED,
118 [PIPE_FORMAT_R8G8B8A8_SSCALED] = ISL_FORMAT_R8G8B8A8_SSCALED,
119 [PIPE_FORMAT_R32_FIXED] = ISL_FORMAT_R32_SFIXED,
120 [PIPE_FORMAT_R32G32_FIXED] = ISL_FORMAT_R32G32_SFIXED,
121 [PIPE_FORMAT_R32G32B32_FIXED] = ISL_FORMAT_R32G32B32_SFIXED,
122 [PIPE_FORMAT_R32G32B32A32_FIXED] = ISL_FORMAT_R32G32B32A32_SFIXED,
123 [PIPE_FORMAT_R16_FLOAT] = ISL_FORMAT_R16_FLOAT,
124 [PIPE_FORMAT_R16G16_FLOAT] = ISL_FORMAT_R16G16_FLOAT,
125 [PIPE_FORMAT_R16G16B16_FLOAT] = ISL_FORMAT_R16G16B16_FLOAT,
126 [PIPE_FORMAT_R16G16B16A16_FLOAT] = ISL_FORMAT_R16G16B16A16_FLOAT,
127
128 [PIPE_FORMAT_R8G8B8_SRGB] = ISL_FORMAT_R8G8B8_UNORM_SRGB,
129 [PIPE_FORMAT_B8G8R8A8_SRGB] = ISL_FORMAT_B8G8R8A8_UNORM_SRGB,
130 [PIPE_FORMAT_B8G8R8X8_SRGB] = ISL_FORMAT_B8G8R8X8_UNORM_SRGB,
131 [PIPE_FORMAT_R8G8B8A8_SRGB] = ISL_FORMAT_R8G8B8A8_UNORM_SRGB,
132
133 [PIPE_FORMAT_DXT1_RGB] = ISL_FORMAT_BC1_UNORM,
134 [PIPE_FORMAT_DXT1_RGBA] = ISL_FORMAT_BC1_UNORM,
135 [PIPE_FORMAT_DXT3_RGBA] = ISL_FORMAT_BC2_UNORM,
136 [PIPE_FORMAT_DXT5_RGBA] = ISL_FORMAT_BC3_UNORM,
137
138 [PIPE_FORMAT_DXT1_SRGB] = ISL_FORMAT_BC1_UNORM_SRGB,
139 [PIPE_FORMAT_DXT1_SRGBA] = ISL_FORMAT_BC1_UNORM_SRGB,
140 [PIPE_FORMAT_DXT3_SRGBA] = ISL_FORMAT_BC2_UNORM_SRGB,
141 [PIPE_FORMAT_DXT5_SRGBA] = ISL_FORMAT_BC3_UNORM_SRGB,
142
143 [PIPE_FORMAT_RGTC1_UNORM] = ISL_FORMAT_BC4_UNORM,
144 [PIPE_FORMAT_RGTC1_SNORM] = ISL_FORMAT_BC4_SNORM,
145 [PIPE_FORMAT_RGTC2_UNORM] = ISL_FORMAT_BC5_UNORM,
146 [PIPE_FORMAT_RGTC2_SNORM] = ISL_FORMAT_BC5_SNORM,
147
148 [PIPE_FORMAT_R10G10B10A2_USCALED] = ISL_FORMAT_R10G10B10A2_USCALED,
149 [PIPE_FORMAT_R11G11B10_FLOAT] = ISL_FORMAT_R11G11B10_FLOAT,
150 [PIPE_FORMAT_R9G9B9E5_FLOAT] = ISL_FORMAT_R9G9B9E5_SHAREDEXP,
151 [PIPE_FORMAT_R1_UNORM] = ISL_FORMAT_R1_UNORM,
152 [PIPE_FORMAT_R10G10B10X2_USCALED] = ISL_FORMAT_R10G10B10X2_USCALED,
153 [PIPE_FORMAT_B10G10R10A2_UNORM] = ISL_FORMAT_B10G10R10A2_UNORM,
154 [PIPE_FORMAT_R8G8B8X8_UNORM] = ISL_FORMAT_R8G8B8X8_UNORM,
155
156 /* Just use red formats for these - they're actually renderable,
157 * and faster to sample than the legacy L/I/A/LA formats.
158 */
159 [PIPE_FORMAT_I8_UNORM] = ISL_FORMAT_R8_UNORM,
160 [PIPE_FORMAT_I8_UINT] = ISL_FORMAT_R8_UINT,
161 [PIPE_FORMAT_I8_SINT] = ISL_FORMAT_R8_SINT,
162 [PIPE_FORMAT_I8_SNORM] = ISL_FORMAT_R8_SNORM,
163 [PIPE_FORMAT_I16_UINT] = ISL_FORMAT_R16_UINT,
164 [PIPE_FORMAT_I16_UNORM] = ISL_FORMAT_R16_UNORM,
165 [PIPE_FORMAT_I16_SINT] = ISL_FORMAT_R16_SINT,
166 [PIPE_FORMAT_I16_SNORM] = ISL_FORMAT_R16_SNORM,
167 [PIPE_FORMAT_I16_FLOAT] = ISL_FORMAT_R16_FLOAT,
168 [PIPE_FORMAT_I32_UINT] = ISL_FORMAT_R32_UINT,
169 [PIPE_FORMAT_I32_SINT] = ISL_FORMAT_R32_SINT,
170 [PIPE_FORMAT_I32_FLOAT] = ISL_FORMAT_R32_FLOAT,
171
172 [PIPE_FORMAT_L8_UINT] = ISL_FORMAT_R8_UINT,
173 [PIPE_FORMAT_L8_UNORM] = ISL_FORMAT_R8_UNORM,
174 [PIPE_FORMAT_L8_SINT] = ISL_FORMAT_R8_SINT,
175 [PIPE_FORMAT_L8_SNORM] = ISL_FORMAT_R8_SNORM,
176 [PIPE_FORMAT_L16_UINT] = ISL_FORMAT_R16_UINT,
177 [PIPE_FORMAT_L16_UNORM] = ISL_FORMAT_R16_UNORM,
178 [PIPE_FORMAT_L16_SINT] = ISL_FORMAT_R16_SINT,
179 [PIPE_FORMAT_L16_SNORM] = ISL_FORMAT_R16_SNORM,
180 [PIPE_FORMAT_L16_FLOAT] = ISL_FORMAT_R16_FLOAT,
181 [PIPE_FORMAT_L32_UINT] = ISL_FORMAT_R32_UINT,
182 [PIPE_FORMAT_L32_SINT] = ISL_FORMAT_R32_SINT,
183 [PIPE_FORMAT_L32_FLOAT] = ISL_FORMAT_R32_FLOAT,
184
185 /* We also map alpha and luminance-alpha formats to red as well,
186 * though most of these (other than A8_UNORM) will be non-renderable.
187 */
188 [PIPE_FORMAT_A8_UINT] = ISL_FORMAT_R8_UINT,
189 [PIPE_FORMAT_A8_UNORM] = ISL_FORMAT_R8_UNORM,
190 [PIPE_FORMAT_A8_SINT] = ISL_FORMAT_R8_SINT,
191 [PIPE_FORMAT_A8_SNORM] = ISL_FORMAT_R8_SNORM,
192 [PIPE_FORMAT_A16_UINT] = ISL_FORMAT_R16_UINT,
193 [PIPE_FORMAT_A16_UNORM] = ISL_FORMAT_R16_UNORM,
194 [PIPE_FORMAT_A16_SINT] = ISL_FORMAT_R16_SINT,
195 [PIPE_FORMAT_A16_SNORM] = ISL_FORMAT_R16_SNORM,
196 [PIPE_FORMAT_A16_FLOAT] = ISL_FORMAT_R16_FLOAT,
197 [PIPE_FORMAT_A32_UINT] = ISL_FORMAT_R32_UINT,
198 [PIPE_FORMAT_A32_SINT] = ISL_FORMAT_R32_SINT,
199 [PIPE_FORMAT_A32_FLOAT] = ISL_FORMAT_R32_FLOAT,
200
201 [PIPE_FORMAT_L8A8_UINT] = ISL_FORMAT_R8G8_UINT,
202 [PIPE_FORMAT_L8A8_UNORM] = ISL_FORMAT_R8G8_UNORM,
203 [PIPE_FORMAT_L8A8_SINT] = ISL_FORMAT_R8G8_SINT,
204 [PIPE_FORMAT_L8A8_SNORM] = ISL_FORMAT_R8G8_SNORM,
205 [PIPE_FORMAT_L16A16_UINT] = ISL_FORMAT_R16G16_UINT,
206 [PIPE_FORMAT_L16A16_UNORM] = ISL_FORMAT_R16G16_UNORM,
207 [PIPE_FORMAT_L16A16_SINT] = ISL_FORMAT_R16G16_SINT,
208 [PIPE_FORMAT_L16A16_SNORM] = ISL_FORMAT_R16G16_SNORM,
209 [PIPE_FORMAT_L16A16_FLOAT] = ISL_FORMAT_R16G16_FLOAT,
210 [PIPE_FORMAT_L32A32_UINT] = ISL_FORMAT_R32G32_UINT,
211 [PIPE_FORMAT_L32A32_SINT] = ISL_FORMAT_R32G32_SINT,
212 [PIPE_FORMAT_L32A32_FLOAT] = ISL_FORMAT_R32G32_FLOAT,
213
214 /* Sadly, we have to use luminance[-alpha] formats for sRGB decoding. */
215 [PIPE_FORMAT_L8_SRGB] = ISL_FORMAT_L8_UNORM_SRGB,
216 [PIPE_FORMAT_L8A8_SRGB] = ISL_FORMAT_L8A8_UNORM_SRGB,
217
218 [PIPE_FORMAT_R10G10B10A2_SSCALED] = ISL_FORMAT_R10G10B10A2_SSCALED,
219 [PIPE_FORMAT_R10G10B10A2_SNORM] = ISL_FORMAT_R10G10B10A2_SNORM,
220
221 [PIPE_FORMAT_B10G10R10A2_USCALED] = ISL_FORMAT_B10G10R10A2_USCALED,
222 [PIPE_FORMAT_B10G10R10A2_SSCALED] = ISL_FORMAT_B10G10R10A2_SSCALED,
223 [PIPE_FORMAT_B10G10R10A2_SNORM] = ISL_FORMAT_B10G10R10A2_SNORM,
224
225 [PIPE_FORMAT_R8_UINT] = ISL_FORMAT_R8_UINT,
226 [PIPE_FORMAT_R8G8_UINT] = ISL_FORMAT_R8G8_UINT,
227 [PIPE_FORMAT_R8G8B8_UINT] = ISL_FORMAT_R8G8B8_UINT,
228 [PIPE_FORMAT_R8G8B8A8_UINT] = ISL_FORMAT_R8G8B8A8_UINT,
229
230 [PIPE_FORMAT_R8_SINT] = ISL_FORMAT_R8_SINT,
231 [PIPE_FORMAT_R8G8_SINT] = ISL_FORMAT_R8G8_SINT,
232 [PIPE_FORMAT_R8G8B8_SINT] = ISL_FORMAT_R8G8B8_SINT,
233 [PIPE_FORMAT_R8G8B8A8_SINT] = ISL_FORMAT_R8G8B8A8_SINT,
234
235 [PIPE_FORMAT_R16_UINT] = ISL_FORMAT_R16_UINT,
236 [PIPE_FORMAT_R16G16_UINT] = ISL_FORMAT_R16G16_UINT,
237 [PIPE_FORMAT_R16G16B16_UINT] = ISL_FORMAT_R16G16B16_UINT,
238 [PIPE_FORMAT_R16G16B16A16_UINT] = ISL_FORMAT_R16G16B16A16_UINT,
239
240 [PIPE_FORMAT_R16_SINT] = ISL_FORMAT_R16_SINT,
241 [PIPE_FORMAT_R16G16_SINT] = ISL_FORMAT_R16G16_SINT,
242 [PIPE_FORMAT_R16G16B16_SINT] = ISL_FORMAT_R16G16B16_SINT,
243 [PIPE_FORMAT_R16G16B16A16_SINT] = ISL_FORMAT_R16G16B16A16_SINT,
244
245 [PIPE_FORMAT_R32_UINT] = ISL_FORMAT_R32_UINT,
246 [PIPE_FORMAT_R32G32_UINT] = ISL_FORMAT_R32G32_UINT,
247 [PIPE_FORMAT_R32G32B32_UINT] = ISL_FORMAT_R32G32B32_UINT,
248 [PIPE_FORMAT_R32G32B32A32_UINT] = ISL_FORMAT_R32G32B32A32_UINT,
249
250 [PIPE_FORMAT_R32_SINT] = ISL_FORMAT_R32_SINT,
251 [PIPE_FORMAT_R32G32_SINT] = ISL_FORMAT_R32G32_SINT,
252 [PIPE_FORMAT_R32G32B32_SINT] = ISL_FORMAT_R32G32B32_SINT,
253 [PIPE_FORMAT_R32G32B32A32_SINT] = ISL_FORMAT_R32G32B32A32_SINT,
254
255 [PIPE_FORMAT_B10G10R10A2_UINT] = ISL_FORMAT_B10G10R10A2_UINT,
256
257 [PIPE_FORMAT_ETC1_RGB8] = ISL_FORMAT_ETC1_RGB8,
258
259 [PIPE_FORMAT_R8G8B8X8_SRGB] = ISL_FORMAT_R8G8B8X8_UNORM_SRGB,
260 [PIPE_FORMAT_B10G10R10X2_UNORM] = ISL_FORMAT_B10G10R10X2_UNORM,
261 [PIPE_FORMAT_R16G16B16X16_UNORM] = ISL_FORMAT_R16G16B16X16_UNORM,
262 [PIPE_FORMAT_R16G16B16X16_FLOAT] = ISL_FORMAT_R16G16B16X16_FLOAT,
263 [PIPE_FORMAT_R32G32B32X32_FLOAT] = ISL_FORMAT_R32G32B32X32_FLOAT,
264
265 [PIPE_FORMAT_R10G10B10A2_UINT] = ISL_FORMAT_R10G10B10A2_UINT,
266
267 [PIPE_FORMAT_B5G6R5_SRGB] = ISL_FORMAT_B5G6R5_UNORM_SRGB,
268
269 [PIPE_FORMAT_BPTC_RGBA_UNORM] = ISL_FORMAT_BC7_UNORM,
270 [PIPE_FORMAT_BPTC_SRGBA] = ISL_FORMAT_BC7_UNORM_SRGB,
271 [PIPE_FORMAT_BPTC_RGB_FLOAT] = ISL_FORMAT_BC6H_SF16,
272 [PIPE_FORMAT_BPTC_RGB_UFLOAT] = ISL_FORMAT_BC6H_UF16,
273
274 [PIPE_FORMAT_ETC2_RGB8] = ISL_FORMAT_ETC2_RGB8,
275 [PIPE_FORMAT_ETC2_SRGB8] = ISL_FORMAT_ETC2_SRGB8,
276 [PIPE_FORMAT_ETC2_RGB8A1] = ISL_FORMAT_ETC2_RGB8_PTA,
277 [PIPE_FORMAT_ETC2_SRGB8A1] = ISL_FORMAT_ETC2_SRGB8_PTA,
278 [PIPE_FORMAT_ETC2_RGBA8] = ISL_FORMAT_ETC2_EAC_RGBA8,
279 [PIPE_FORMAT_ETC2_SRGBA8] = ISL_FORMAT_ETC2_EAC_SRGB8_A8,
280 [PIPE_FORMAT_ETC2_R11_UNORM] = ISL_FORMAT_EAC_R11,
281 [PIPE_FORMAT_ETC2_R11_SNORM] = ISL_FORMAT_EAC_SIGNED_R11,
282 [PIPE_FORMAT_ETC2_RG11_UNORM] = ISL_FORMAT_EAC_RG11,
283 [PIPE_FORMAT_ETC2_RG11_SNORM] = ISL_FORMAT_EAC_SIGNED_RG11,
284
285
286 [PIPE_FORMAT_ASTC_4x4] = ISL_FORMAT_ASTC_LDR_2D_4X4_FLT16,
287 [PIPE_FORMAT_ASTC_5x4] = ISL_FORMAT_ASTC_LDR_2D_5X4_FLT16,
288 [PIPE_FORMAT_ASTC_5x5] = ISL_FORMAT_ASTC_LDR_2D_5X5_FLT16,
289 [PIPE_FORMAT_ASTC_6x5] = ISL_FORMAT_ASTC_LDR_2D_6X5_FLT16,
290 [PIPE_FORMAT_ASTC_6x6] = ISL_FORMAT_ASTC_LDR_2D_6X6_FLT16,
291 [PIPE_FORMAT_ASTC_8x5] = ISL_FORMAT_ASTC_LDR_2D_8X5_FLT16,
292 [PIPE_FORMAT_ASTC_8x6] = ISL_FORMAT_ASTC_LDR_2D_8X6_FLT16,
293 [PIPE_FORMAT_ASTC_8x8] = ISL_FORMAT_ASTC_LDR_2D_8X8_FLT16,
294 [PIPE_FORMAT_ASTC_10x5] = ISL_FORMAT_ASTC_LDR_2D_10X5_FLT16,
295 [PIPE_FORMAT_ASTC_10x6] = ISL_FORMAT_ASTC_LDR_2D_10X6_FLT16,
296 [PIPE_FORMAT_ASTC_10x8] = ISL_FORMAT_ASTC_LDR_2D_10X8_FLT16,
297 [PIPE_FORMAT_ASTC_10x10] = ISL_FORMAT_ASTC_LDR_2D_10X10_FLT16,
298 [PIPE_FORMAT_ASTC_12x10] = ISL_FORMAT_ASTC_LDR_2D_12X10_FLT16,
299 [PIPE_FORMAT_ASTC_12x12] = ISL_FORMAT_ASTC_LDR_2D_12X12_FLT16,
300
301 [PIPE_FORMAT_ASTC_4x4_SRGB] = ISL_FORMAT_ASTC_LDR_2D_4X4_U8SRGB,
302 [PIPE_FORMAT_ASTC_5x4_SRGB] = ISL_FORMAT_ASTC_LDR_2D_5X4_U8SRGB,
303 [PIPE_FORMAT_ASTC_5x5_SRGB] = ISL_FORMAT_ASTC_LDR_2D_5X5_U8SRGB,
304 [PIPE_FORMAT_ASTC_6x5_SRGB] = ISL_FORMAT_ASTC_LDR_2D_6X5_U8SRGB,
305 [PIPE_FORMAT_ASTC_6x6_SRGB] = ISL_FORMAT_ASTC_LDR_2D_6X6_U8SRGB,
306 [PIPE_FORMAT_ASTC_8x5_SRGB] = ISL_FORMAT_ASTC_LDR_2D_8X5_U8SRGB,
307 [PIPE_FORMAT_ASTC_8x6_SRGB] = ISL_FORMAT_ASTC_LDR_2D_8X6_U8SRGB,
308 [PIPE_FORMAT_ASTC_8x8_SRGB] = ISL_FORMAT_ASTC_LDR_2D_8X8_U8SRGB,
309 [PIPE_FORMAT_ASTC_10x5_SRGB] = ISL_FORMAT_ASTC_LDR_2D_10X5_U8SRGB,
310 [PIPE_FORMAT_ASTC_10x6_SRGB] = ISL_FORMAT_ASTC_LDR_2D_10X6_U8SRGB,
311 [PIPE_FORMAT_ASTC_10x8_SRGB] = ISL_FORMAT_ASTC_LDR_2D_10X8_U8SRGB,
312 [PIPE_FORMAT_ASTC_10x10_SRGB] = ISL_FORMAT_ASTC_LDR_2D_10X10_U8SRGB,
313 [PIPE_FORMAT_ASTC_12x10_SRGB] = ISL_FORMAT_ASTC_LDR_2D_12X10_U8SRGB,
314 [PIPE_FORMAT_ASTC_12x12_SRGB] = ISL_FORMAT_ASTC_LDR_2D_12X12_U8SRGB,
315
316 [PIPE_FORMAT_A1B5G5R5_UNORM] = ISL_FORMAT_A1B5G5R5_UNORM,
317 };
318 assert(pf < PIPE_FORMAT_COUNT);
319 return table[pf];
320 }
321
322 struct iris_format_info
323 iris_format_for_usage(const struct gen_device_info *devinfo,
324 enum pipe_format pformat,
325 isl_surf_usage_flags_t usage)
326 {
327 enum isl_format format = iris_isl_format_for_pipe_format(pformat);
328 struct isl_swizzle swizzle = ISL_SWIZZLE_IDENTITY;
329
330 if (!util_format_is_srgb(pformat)) {
331 if (util_format_is_intensity(pformat)) {
332 swizzle = ISL_SWIZZLE(RED, RED, RED, RED);
333 } else if (util_format_is_luminance(pformat)) {
334 swizzle = ISL_SWIZZLE(RED, RED, RED, ONE);
335 } else if (util_format_is_luminance_alpha(pformat)) {
336 swizzle = ISL_SWIZZLE(RED, RED, RED, GREEN);
337 } else if (util_format_is_alpha(pformat)) {
338 swizzle = ISL_SWIZZLE(ZERO, ZERO, ZERO, RED);
339 }
340 }
341
342 if (pformat == PIPE_FORMAT_DXT1_RGB ||
343 pformat == PIPE_FORMAT_DXT1_SRGB) {
344 swizzle = ISL_SWIZZLE(RED, GREEN, BLUE, ONE);
345 }
346
347 if (usage & ISL_SURF_USAGE_RENDER_TARGET_BIT) {
348 if (isl_format_is_rgbx(format) &&
349 !isl_format_supports_rendering(devinfo, format)) {
350 format = isl_format_rgbx_to_rgba(format);
351 } else if (pformat == PIPE_FORMAT_A8_UNORM) {
352 /* Most of the hardware A/LA formats are not renderable, except
353 * for A8_UNORM. SURFACE_STATE's shader channel select fields
354 * cannot be used to swap RGB and A channels when rendering (as
355 * it could impact alpha blending), so we have to use the actual
356 * A8_UNORM format when rendering.
357 */
358 format = ISL_FORMAT_A8_UNORM;
359 swizzle = ISL_SWIZZLE_IDENTITY;
360 }
361 }
362
363 return (struct iris_format_info) { .fmt = format, .swizzle = swizzle };
364 }
365
366 /**
367 * The pscreen->is_format_supported() driver hook.
368 *
369 * Returns true if the given format is supported for the given usage
370 * (PIPE_BIND_*) and sample count.
371 */
372 boolean
373 iris_is_format_supported(struct pipe_screen *pscreen,
374 enum pipe_format pformat,
375 enum pipe_texture_target target,
376 unsigned sample_count,
377 unsigned storage_sample_count,
378 unsigned usage)
379 {
380 struct iris_screen *screen = (struct iris_screen *) pscreen;
381 const struct gen_device_info *devinfo = &screen->devinfo;
382 uint32_t max_samples = devinfo->gen == 8 ? 8 : 16;
383
384 // XXX: msaa max
385 if (sample_count > max_samples || !util_is_power_of_two_or_zero(sample_count))
386 return false;
387
388 if (pformat == PIPE_FORMAT_NONE)
389 return true;
390
391 enum isl_format format = iris_isl_format_for_pipe_format(pformat);
392
393 if (format == ISL_FORMAT_UNSUPPORTED)
394 return false;
395
396 const struct isl_format_layout *fmtl = isl_format_get_layout(format);
397 const bool is_integer = isl_format_has_int_channel(format);
398 bool supported = true;
399
400 if (sample_count > 1)
401 supported &= isl_format_supports_multisampling(devinfo, format);
402
403 if (usage & PIPE_BIND_DEPTH_STENCIL) {
404 supported &= format == ISL_FORMAT_R32_FLOAT_X8X24_TYPELESS ||
405 format == ISL_FORMAT_R32_FLOAT ||
406 format == ISL_FORMAT_R24_UNORM_X8_TYPELESS ||
407 format == ISL_FORMAT_R16_UNORM ||
408 format == ISL_FORMAT_R8_UINT;
409 }
410
411 if (usage & PIPE_BIND_RENDER_TARGET) {
412 /* Alpha and luminance-alpha formats other than A8_UNORM are not
413 * renderable. For texturing, we can use R or RG formats with
414 * shader channel selects (SCS) to swizzle the data into the correct
415 * channels. But for render targets, the hardware prohibits using
416 * SCS to move shader outputs between the RGB and A channels, as it
417 * would alter what data is used for alpha blending.
418 *
419 * For BLORP, we can apply the swizzle in the shader. But for
420 * general rendering, this would mean recompiling the shader, which
421 * we'd like to avoid doing. So we mark these formats non-renderable.
422 *
423 * We do support A8_UNORM as it's required and is renderable.
424 */
425 if (pformat != PIPE_FORMAT_A8_UNORM &&
426 (util_format_is_alpha(pformat) ||
427 util_format_is_luminance_alpha(pformat)))
428 supported = false;
429
430 enum isl_format rt_format = format;
431
432 if (isl_format_is_rgbx(format) &&
433 !isl_format_supports_rendering(devinfo, format))
434 rt_format = isl_format_rgbx_to_rgba(format);
435
436 supported &= isl_format_supports_rendering(devinfo, rt_format);
437
438 if (!is_integer)
439 supported &= isl_format_supports_alpha_blending(devinfo, rt_format);
440 }
441
442 if (usage & PIPE_BIND_SHADER_IMAGE) {
443 // XXX: allow untyped reads
444 supported &= isl_format_supports_typed_reads(devinfo, format) &&
445 isl_format_supports_typed_writes(devinfo, format);
446 }
447
448 if (usage & PIPE_BIND_SAMPLER_VIEW) {
449 supported &= isl_format_supports_sampling(devinfo, format);
450 if (!is_integer)
451 supported &= isl_format_supports_filtering(devinfo, format);
452
453 /* Don't advertise 3-component RGB formats. This ensures that they
454 * are renderable from an API perspective since the state tracker will
455 * fall back to RGBA or RGBX, which are renderable. We want to render
456 * internally for copies and blits, even if the application doesn't.
457 *
458 * We do need to advertise 32-bit RGB for texture buffers though.
459 */
460 supported &= fmtl->bpb != 24 && fmtl->bpb != 48 &&
461 (fmtl->bpb != 96 || target == PIPE_BUFFER);
462 }
463
464 if (usage & PIPE_BIND_VERTEX_BUFFER)
465 supported &= isl_format_supports_vertex_fetch(devinfo, format);
466
467 if (usage & PIPE_BIND_INDEX_BUFFER) {
468 supported &= format == ISL_FORMAT_R8_UINT ||
469 format == ISL_FORMAT_R16_UINT ||
470 format == ISL_FORMAT_R32_UINT;
471 }
472
473 if (usage & PIPE_BIND_CONSTANT_BUFFER) {
474 // XXX:
475 }
476
477 if (usage & PIPE_BIND_STREAM_OUTPUT) {
478 // XXX:
479 }
480
481 if (usage & PIPE_BIND_CURSOR) {
482 // XXX:
483 }
484
485 if (usage & PIPE_BIND_CUSTOM) {
486 // XXX:
487 }
488
489 if (usage & PIPE_BIND_SHADER_BUFFER) {
490 // XXX:
491 }
492
493 if (usage & PIPE_BIND_COMPUTE_RESOURCE) {
494 // XXX:
495 }
496
497 if (usage & PIPE_BIND_COMMAND_ARGS_BUFFER) {
498 // XXX:
499 }
500
501 if (usage & PIPE_BIND_QUERY_BUFFER) {
502 // XXX:
503 }
504
505 return supported;
506 }
507