1 /**************************************************************************
3 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
30 * Functions to produce packed colors/Z from floats.
34 #ifndef U_PACK_COLOR_H
35 #define U_PACK_COLOR_H
38 #include "pipe/p_compiler.h"
39 #include "pipe/p_format.h"
40 #include "util/u_format.h"
41 #include "util/u_math.h"
53 * Pack ubyte R,G,B,A into dest pixel.
56 util_pack_color_ub(ubyte r
, ubyte g
, ubyte b
, ubyte a
,
57 enum pipe_format format
, union util_color
*uc
)
60 case PIPE_FORMAT_A8B8G8R8_UNORM
:
62 uc
->ui
= (r
<< 24) | (g
<< 16) | (b
<< 8) | a
;
65 case PIPE_FORMAT_X8B8G8R8_UNORM
:
67 uc
->ui
= (r
<< 24) | (g
<< 16) | (b
<< 8) | 0xff;
70 case PIPE_FORMAT_B8G8R8A8_UNORM
:
72 uc
->ui
= (a
<< 24) | (r
<< 16) | (g
<< 8) | b
;
75 case PIPE_FORMAT_B8G8R8X8_UNORM
:
77 uc
->ui
= (0xff << 24) | (r
<< 16) | (g
<< 8) | b
;
80 case PIPE_FORMAT_A8R8G8B8_UNORM
:
82 uc
->ui
= (b
<< 24) | (g
<< 16) | (r
<< 8) | a
;
85 case PIPE_FORMAT_X8R8G8B8_UNORM
:
87 uc
->ui
= (b
<< 24) | (g
<< 16) | (r
<< 8) | 0xff;
90 case PIPE_FORMAT_B5G6R5_UNORM
:
92 uc
->us
= ((r
& 0xf8) << 8) | ((g
& 0xfc) << 3) | (b
>> 3);
95 case PIPE_FORMAT_B5G5R5X1_UNORM
:
97 uc
->us
= ((0x80) << 8) | ((r
& 0xf8) << 7) | ((g
& 0xf8) << 2) | (b
>> 3);
100 case PIPE_FORMAT_B5G5R5A1_UNORM
:
102 uc
->us
= ((a
& 0x80) << 8) | ((r
& 0xf8) << 7) | ((g
& 0xf8) << 2) | (b
>> 3);
105 case PIPE_FORMAT_B4G4R4A4_UNORM
:
107 uc
->us
= ((a
& 0xf0) << 8) | ((r
& 0xf0) << 4) | ((g
& 0xf0) << 0) | (b
>> 4);
110 case PIPE_FORMAT_A8_UNORM
:
115 case PIPE_FORMAT_L8_UNORM
:
116 case PIPE_FORMAT_I8_UNORM
:
121 case PIPE_FORMAT_R32G32B32A32_FLOAT
:
123 uc
->f
[0] = (float)r
/ 255.0f
;
124 uc
->f
[1] = (float)g
/ 255.0f
;
125 uc
->f
[2] = (float)b
/ 255.0f
;
126 uc
->f
[3] = (float)a
/ 255.0f
;
129 case PIPE_FORMAT_R32G32B32_FLOAT
:
131 uc
->f
[0] = (float)r
/ 255.0f
;
132 uc
->f
[1] = (float)g
/ 255.0f
;
133 uc
->f
[2] = (float)b
/ 255.0f
;
137 /* Handle other cases with a generic function.
147 util_format_write_4ub(format
, src
, 0, uc
, 0, 0, 0, 1, 1);
154 * Unpack RGBA from a packed pixel, returning values as ubytes in [0,255].
157 util_unpack_color_ub(enum pipe_format format
, union util_color
*uc
,
158 ubyte
*r
, ubyte
*g
, ubyte
*b
, ubyte
*a
)
161 case PIPE_FORMAT_A8B8G8R8_UNORM
:
164 *r
= (ubyte
) ((p
>> 24) & 0xff);
165 *g
= (ubyte
) ((p
>> 16) & 0xff);
166 *b
= (ubyte
) ((p
>> 8) & 0xff);
167 *a
= (ubyte
) ((p
>> 0) & 0xff);
170 case PIPE_FORMAT_X8B8G8R8_UNORM
:
173 *r
= (ubyte
) ((p
>> 24) & 0xff);
174 *g
= (ubyte
) ((p
>> 16) & 0xff);
175 *b
= (ubyte
) ((p
>> 8) & 0xff);
179 case PIPE_FORMAT_B8G8R8A8_UNORM
:
182 *r
= (ubyte
) ((p
>> 16) & 0xff);
183 *g
= (ubyte
) ((p
>> 8) & 0xff);
184 *b
= (ubyte
) ((p
>> 0) & 0xff);
185 *a
= (ubyte
) ((p
>> 24) & 0xff);
188 case PIPE_FORMAT_B8G8R8X8_UNORM
:
191 *r
= (ubyte
) ((p
>> 16) & 0xff);
192 *g
= (ubyte
) ((p
>> 8) & 0xff);
193 *b
= (ubyte
) ((p
>> 0) & 0xff);
197 case PIPE_FORMAT_A8R8G8B8_UNORM
:
200 *r
= (ubyte
) ((p
>> 8) & 0xff);
201 *g
= (ubyte
) ((p
>> 16) & 0xff);
202 *b
= (ubyte
) ((p
>> 24) & 0xff);
203 *a
= (ubyte
) ((p
>> 0) & 0xff);
206 case PIPE_FORMAT_X8R8G8B8_UNORM
:
209 *r
= (ubyte
) ((p
>> 8) & 0xff);
210 *g
= (ubyte
) ((p
>> 16) & 0xff);
211 *b
= (ubyte
) ((p
>> 24) & 0xff);
215 case PIPE_FORMAT_B5G6R5_UNORM
:
218 *r
= (ubyte
) (((p
>> 8) & 0xf8) | ((p
>> 13) & 0x7));
219 *g
= (ubyte
) (((p
>> 3) & 0xfc) | ((p
>> 9) & 0x3));
220 *b
= (ubyte
) (((p
<< 3) & 0xf8) | ((p
>> 2) & 0x7));
224 case PIPE_FORMAT_B5G5R5X1_UNORM
:
227 *r
= (ubyte
) (((p
>> 7) & 0xf8) | ((p
>> 12) & 0x7));
228 *g
= (ubyte
) (((p
>> 2) & 0xf8) | ((p
>> 7) & 0x7));
229 *b
= (ubyte
) (((p
<< 3) & 0xf8) | ((p
>> 2) & 0x7));
233 case PIPE_FORMAT_B5G5R5A1_UNORM
:
236 *r
= (ubyte
) (((p
>> 7) & 0xf8) | ((p
>> 12) & 0x7));
237 *g
= (ubyte
) (((p
>> 2) & 0xf8) | ((p
>> 7) & 0x7));
238 *b
= (ubyte
) (((p
<< 3) & 0xf8) | ((p
>> 2) & 0x7));
239 *a
= (ubyte
) (0xff * (p
>> 15));
242 case PIPE_FORMAT_B4G4R4A4_UNORM
:
245 *r
= (ubyte
) (((p
>> 4) & 0xf0) | ((p
>> 8) & 0xf));
246 *g
= (ubyte
) (((p
>> 0) & 0xf0) | ((p
>> 4) & 0xf));
247 *b
= (ubyte
) (((p
<< 4) & 0xf0) | ((p
>> 0) & 0xf));
248 *a
= (ubyte
) (((p
>> 8) & 0xf0) | ((p
>> 12) & 0xf));
251 case PIPE_FORMAT_A8_UNORM
:
254 *r
= *g
= *b
= (ubyte
) 0xff;
258 case PIPE_FORMAT_L8_UNORM
:
265 case PIPE_FORMAT_I8_UNORM
:
268 *r
= *g
= *b
= *a
= p
;
271 case PIPE_FORMAT_R32G32B32A32_FLOAT
:
273 const float *p
= &uc
->f
[0];
274 *r
= float_to_ubyte(p
[0]);
275 *g
= float_to_ubyte(p
[1]);
276 *b
= float_to_ubyte(p
[2]);
277 *a
= float_to_ubyte(p
[3]);
280 case PIPE_FORMAT_R32G32B32_FLOAT
:
282 const float *p
= &uc
->f
[0];
283 *r
= float_to_ubyte(p
[0]);
284 *g
= float_to_ubyte(p
[1]);
285 *b
= float_to_ubyte(p
[2]);
290 case PIPE_FORMAT_R32G32_FLOAT
:
292 const float *p
= &uc
->f
[0];
293 *r
= float_to_ubyte(p
[0]);
294 *g
= float_to_ubyte(p
[1]);
295 *b
= *a
= (ubyte
) 0xff;
299 case PIPE_FORMAT_R32_FLOAT
:
301 const float *p
= &uc
->f
[0];
302 *r
= float_to_ubyte(p
[0]);
303 *g
= *b
= *a
= (ubyte
) 0xff;
307 /* Handle other cases with a generic function.
313 util_format_read_4ub(format
, dst
, 0, uc
, 0, 0, 0, 1, 1);
324 * Note rgba outside [0,1] will be clamped for int pixel formats.
327 util_pack_color(const float rgba
[4], enum pipe_format format
, union util_color
*uc
)
334 if (util_format_get_component_bits(format
, UTIL_FORMAT_COLORSPACE_RGB
, 0) <= 8) {
335 /* format uses 8-bit components or less */
336 r
= float_to_ubyte(rgba
[0]);
337 g
= float_to_ubyte(rgba
[1]);
338 b
= float_to_ubyte(rgba
[2]);
339 a
= float_to_ubyte(rgba
[3]);
343 case PIPE_FORMAT_A8B8G8R8_UNORM
:
345 uc
->ui
= (r
<< 24) | (g
<< 16) | (b
<< 8) | a
;
348 case PIPE_FORMAT_X8B8G8R8_UNORM
:
350 uc
->ui
= (r
<< 24) | (g
<< 16) | (b
<< 8) | 0xff;
353 case PIPE_FORMAT_B8G8R8A8_UNORM
:
355 uc
->ui
= (a
<< 24) | (r
<< 16) | (g
<< 8) | b
;
358 case PIPE_FORMAT_B8G8R8X8_UNORM
:
360 uc
->ui
= (0xff << 24) | (r
<< 16) | (g
<< 8) | b
;
363 case PIPE_FORMAT_A8R8G8B8_UNORM
:
365 uc
->ui
= (b
<< 24) | (g
<< 16) | (r
<< 8) | a
;
368 case PIPE_FORMAT_X8R8G8B8_UNORM
:
370 uc
->ui
= (b
<< 24) | (g
<< 16) | (r
<< 8) | 0xff;
373 case PIPE_FORMAT_B5G6R5_UNORM
:
375 uc
->us
= ((r
& 0xf8) << 8) | ((g
& 0xfc) << 3) | (b
>> 3);
378 case PIPE_FORMAT_B5G5R5X1_UNORM
:
380 uc
->us
= ((0x80) << 8) | ((r
& 0xf8) << 7) | ((g
& 0xf8) << 2) | (b
>> 3);
383 case PIPE_FORMAT_B5G5R5A1_UNORM
:
385 uc
->us
= ((a
& 0x80) << 8) | ((r
& 0xf8) << 7) | ((g
& 0xf8) << 2) | (b
>> 3);
388 case PIPE_FORMAT_B4G4R4A4_UNORM
:
390 uc
->ub
= ((a
& 0xf0) << 8) | ((r
& 0xf0) << 4) | ((g
& 0xf0) << 0) | (b
>> 4);
393 case PIPE_FORMAT_A8_UNORM
:
398 case PIPE_FORMAT_L8_UNORM
:
399 case PIPE_FORMAT_I8_UNORM
:
404 case PIPE_FORMAT_R32G32B32A32_FLOAT
:
412 case PIPE_FORMAT_R32G32B32_FLOAT
:
420 /* Handle other cases with a generic function.
423 util_format_write_4f(format
, rgba
, 0, uc
, 0, 0, 0, 1, 1);
429 * Note: it's assumed that z is in [0,1]
432 util_pack_z(enum pipe_format format
, double z
)
438 case PIPE_FORMAT_Z16_UNORM
:
441 return (uint
) (z
* 0xffff);
442 case PIPE_FORMAT_Z32_UNORM
:
443 /* special-case to avoid overflow */
446 return (uint
) (z
* 0xffffffff);
447 case PIPE_FORMAT_Z32_FLOAT
:
449 case PIPE_FORMAT_Z24S8_UNORM
:
450 case PIPE_FORMAT_Z24X8_UNORM
:
453 return (uint
) (z
* 0xffffff);
454 case PIPE_FORMAT_S8Z24_UNORM
:
455 case PIPE_FORMAT_X8Z24_UNORM
:
458 return ((uint
) (z
* 0xffffff)) << 8;
459 case PIPE_FORMAT_S8_UNORM
:
460 /* this case can get it via util_pack_z_stencil() */
463 debug_print_format("gallium: unhandled format in util_pack_z()", format
);
471 * Pack Z and/or stencil values into a 32-bit value described by format.
472 * Note: it's assumed that z is in [0,1] and s in [0,255]
475 util_pack_z_stencil(enum pipe_format format
, double z
, uint s
)
477 unsigned packed
= util_pack_z(format
, z
);
480 case PIPE_FORMAT_Z24S8_UNORM
:
483 case PIPE_FORMAT_S8Z24_UNORM
:
486 case PIPE_FORMAT_S8_UNORM
:
498 * Pack 4 ubytes into a 4-byte word
500 static INLINE
unsigned
501 pack_ub4(ubyte b0
, ubyte b1
, ubyte b2
, ubyte b3
)
503 return ((((unsigned int)b0
) << 0) |
504 (((unsigned int)b1
) << 8) |
505 (((unsigned int)b2
) << 16) |
506 (((unsigned int)b3
) << 24));
511 * Pack/convert 4 floats into one 4-byte word.
513 static INLINE
unsigned
514 pack_ui32_float4(float a
, float b
, float c
, float d
)
516 return pack_ub4( float_to_ubyte(a
),
524 #endif /* U_PACK_COLOR_H */