u_format_other.c revision 349184be36e59f49309b8c1f371d99efceaf6d5f 
1/**************************************************************************
2 *
3 * Copyright 2010 VMware, Inc.
4 * All Rights Reserved.
5 *
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:
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
18 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
19 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
20 * USE OR OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * The above copyright notice and this permission notice (including the
23 * next paragraph) shall be included in all copies or substantial portions
24 * of the Software.
25 *
26 **************************************************************************/
27
28
29#include "u_math.h"
30#include "u_format_other.h"
31#include "../../../mesa/main/rgb9e5.h"
32
33
34void
35util_format_r9g9b9e5_float_unpack_rgba_float(float *dst_row, unsigned dst_stride,
36                                        const uint8_t *src_row, unsigned src_stride,
37                                        unsigned width, unsigned height)
38{
39   unsigned x, y;
40   for(y = 0; y < height; y += 1) {
41      float *dst = dst_row;
42      const uint8_t *src = src_row;
43      for(x = 0; x < width; x += 1) {
44         uint32_t value = *(const uint32_t *)src;
45#ifdef PIPE_ARCH_BIG_ENDIAN
46         value = util_bswap32(value);
47#endif
48         rgb9e5_to_float3(value, dst);
49         dst[3] = 1; /* a */
50         src += 4;
51         dst += 4;
52      }
53      src_row += src_stride;
54      dst_row += dst_stride/sizeof(*dst_row);
55   }
56}
57
58void
59util_format_r9g9b9e5_float_pack_rgba_float(uint8_t *dst_row, unsigned dst_stride,
60                                      const float *src_row, unsigned src_stride,
61                                      unsigned width, unsigned height)
62{
63   unsigned x, y;
64   for(y = 0; y < height; y += 1) {
65      const float *src = src_row;
66      uint8_t *dst = dst_row;
67      for(x = 0; x < width; x += 1) {
68         uint32_t value = float3_to_rgb9e5(src);
69#ifdef PIPE_ARCH_BIG_ENDIAN
70         value = util_bswap32(value);
71#endif
72         *(uint32_t *)dst = value;
73         src += 4;
74         dst += 4;
75      }
76      dst_row += dst_stride;
77      src_row += src_stride/sizeof(*src_row);
78   }
79}
80
81void
82util_format_r9g9b9e5_float_fetch_rgba_float(float *dst, const uint8_t *src,
83                                       unsigned i, unsigned j)
84{
85   uint32_t value = *(const uint32_t *)src;
86#ifdef PIPE_ARCH_BIG_ENDIAN
87   value = util_bswap32(value);
88#endif
89   rgb9e5_to_float3(value, dst);
90   dst[3] = 1; /* a */
91}
92
93
94void
95util_format_r9g9b9e5_float_unpack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
96                                         const uint8_t *src_row, unsigned src_stride,
97                                         unsigned width, unsigned height)
98{
99   unsigned x, y;
100   float p[3];
101   for(y = 0; y < height; y += 1) {
102      uint8_t *dst = dst_row;
103      const uint8_t *src = src_row;
104      for(x = 0; x < width; x += 1) {
105         uint32_t value = *(const uint32_t *)src;
106#ifdef PIPE_ARCH_BIG_ENDIAN
107         value = util_bswap32(value);
108#endif
109         rgb9e5_to_float3(value, p);
110         dst[0] = float_to_ubyte(p[0]); /* r */
111         dst[1] = float_to_ubyte(p[1]); /* g */
112         dst[2] = float_to_ubyte(p[2]); /* b */
113         dst[3] = 255; /* a */
114         src += 4;
115         dst += 4;
116      }
117      src_row += src_stride;
118      dst_row += dst_stride/sizeof(*dst_row);
119   }
120}
121
122
123void
124util_format_r9g9b9e5_float_pack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
125                                       const uint8_t *src_row, unsigned src_stride,
126                                       unsigned width, unsigned height)
127{
128   unsigned x, y;
129   float p[3];
130   for(y = 0; y < height; y += 1) {
131      const uint8_t *src = src_row;
132      uint8_t *dst = dst_row;
133      for(x = 0; x < width; x += 1) {
134         uint32_t value;
135         p[0] = ubyte_to_float(src[0]);
136         p[1] = ubyte_to_float(src[1]);
137         p[2] = ubyte_to_float(src[2]);
138         value = float3_to_rgb9e5(p);
139#ifdef PIPE_ARCH_BIG_ENDIAN
140         value = util_bswap32(value);
141#endif
142         *(uint32_t *)dst = value;
143         src += 4;
144         dst += 4;
145      }
146      dst_row += dst_stride;
147      src_row += src_stride/sizeof(*src_row);
148   }
149}
150
151
152void
153util_format_r1_unorm_unpack_rgba_float(float *dst_row, unsigned dst_stride,
154                                  const uint8_t *src_row, unsigned src_stride,
155                                  unsigned width, unsigned height)
156{
157
158}
159
160
161void
162util_format_r1_unorm_pack_rgba_float(uint8_t *dst_row, unsigned dst_stride,
163                                const float *src_row, unsigned src_stride,
164                                unsigned width, unsigned height)
165{
166
167}
168
169
170void
171util_format_r1_unorm_fetch_rgba_float(float *dst, const uint8_t *src,
172                                 unsigned i, unsigned j)
173{
174
175}
176
177
178void
179util_format_r1_unorm_unpack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
180                                   const uint8_t *src_row, unsigned src_stride,
181                                   unsigned width, unsigned height)
182{
183
184}
185
186
187void
188util_format_r1_unorm_pack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
189                                 const uint8_t *src_row, unsigned src_stride,
190                                 unsigned width, unsigned height)
191{
192}
193
194
195/*
196 * PIPE_FORMAT_R8G8Bx_SNORM
197 *
198 * A.k.a. D3DFMT_CxV8U8
199 */
200
201static uint8_t
202r8g8bx_derive(int16_t r, int16_t g)
203{
204   /* Derive blue from red and green components.
205    * Apparently, we must always use integers to perform calculations,
206    * otherwise the results won't match D3D's CxV8U8 definition.
207    */
208   return (uint8_t)sqrtf(0x7f * 0x7f - r * r - g * g) * 0xff / 0x7f;
209}
210
211void
212util_format_r8g8bx_snorm_unpack_rgba_float(float *dst_row, unsigned dst_stride,
213                                      const uint8_t *src_row, unsigned src_stride,
214                                      unsigned width, unsigned height)
215{
216   unsigned x, y;
217
218   for(y = 0; y < height; y += 1) {
219      float *dst = dst_row;
220      const uint16_t *src = (const uint16_t *)src_row;
221      for(x = 0; x < width; x += 1) {
222         uint16_t value = *src++;
223         int16_t r, g;
224
225#ifdef PIPE_ARCH_BIG_ENDIAN
226         value = util_bswap32(value);
227#endif
228
229         r = ((int16_t)(value << 8)) >> 8;
230         g = ((int16_t)(value << 0)) >> 8;
231
232         dst[0] = (float)(r * (1.0f/0x7f)); /* r */
233         dst[1] = (float)(g * (1.0f/0x7f)); /* g */
234         dst[2] = r8g8bx_derive(r, g) * (1.0f/0xff); /* b */
235         dst[3] = 1.0f; /* a */
236         dst += 4;
237      }
238      src_row += src_stride;
239      dst_row += dst_stride/sizeof(*dst_row);
240   }
241}
242
243
244void
245util_format_r8g8bx_snorm_unpack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
246                                       const uint8_t *src_row, unsigned src_stride,
247                                       unsigned width, unsigned height)
248{
249   unsigned x, y;
250   for(y = 0; y < height; y += 1) {
251      uint8_t *dst = dst_row;
252      const uint16_t *src = (const uint16_t *)src_row;
253      for(x = 0; x < width; x += 1) {
254         uint16_t value = *src++;
255         int16_t r, g;
256
257#ifdef PIPE_ARCH_BIG_ENDIAN
258         value = util_bswap32(value);
259#endif
260
261         r = ((int16_t)(value << 8)) >> 8;
262         g = ((int16_t)(value << 0)) >> 8;
263
264         dst[0] = (uint8_t)(((uint16_t)MAX2(r, 0)) * 0xff / 0x7f); /* r */
265         dst[1] = (uint8_t)(((uint16_t)MAX2(g, 0)) * 0xff / 0x7f); /* g */
266         dst[2] = r8g8bx_derive(r, g); /* b */
267         dst[3] = 255; /* a */
268         dst += 4;
269      }
270      src_row += src_stride;
271      dst_row += dst_stride/sizeof(*dst_row);
272   }
273}
274
275
276void
277util_format_r8g8bx_snorm_pack_rgba_float(uint8_t *dst_row, unsigned dst_stride,
278                                    const float *src_row, unsigned src_stride,
279                                    unsigned width, unsigned height)
280{
281   unsigned x, y;
282   for(y = 0; y < height; y += 1) {
283      const float *src = src_row;
284      uint16_t *dst = (uint16_t *)dst_row;
285      for(x = 0; x < width; x += 1) {
286         uint16_t value = 0;
287
288         value |= (uint16_t)(((int8_t)(CLAMP(src[0], -1, 1) * 0x7f)) & 0xff) ;
289         value |= (uint16_t)((((int8_t)(CLAMP(src[1], -1, 1) * 0x7f)) & 0xff) << 8) ;
290
291#ifdef PIPE_ARCH_BIG_ENDIAN
292         value = util_bswap32(value);
293#endif
294
295         *dst++ = value;
296
297         src += 4;
298      }
299      dst_row += dst_stride;
300      src_row += src_stride/sizeof(*src_row);
301   }
302}
303
304
305void
306util_format_r8g8bx_snorm_pack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
307                                     const uint8_t *src_row, unsigned src_stride,
308                                     unsigned width, unsigned height)
309{
310   unsigned x, y;
311
312   for(y = 0; y < height; y += 1) {
313      const uint8_t *src = src_row;
314      uint16_t *dst = (uint16_t *)dst_row;
315      for(x = 0; x < width; x += 1) {
316         uint16_t value = 0;
317
318         value |= src[0] >> 1;
319         value |= (src[1] >> 1) << 8;
320
321#ifdef PIPE_ARCH_BIG_ENDIAN
322         value = util_bswap32(value);
323#endif
324
325         *dst++ = value;
326
327         src += 4;
328      }
329      dst_row += dst_stride;
330      src_row += src_stride/sizeof(*src_row);
331   }
332}
333
334
335void
336util_format_r8g8bx_snorm_fetch_rgba_float(float *dst, const uint8_t *src,
337                                     unsigned i, unsigned j)
338{
339   uint16_t value = *(const uint16_t *)src;
340   int16_t r, g;
341
342#ifdef PIPE_ARCH_BIG_ENDIAN
343   value = util_bswap32(value);
344#endif
345
346   r = ((int16_t)(value << 8)) >> 8;
347   g = ((int16_t)(value << 0)) >> 8;
348
349   dst[0] = r * (1.0f/0x7f); /* r */
350   dst[1] = g * (1.0f/0x7f); /* g */
351   dst[2] = r8g8bx_derive(r, g) * (1.0f/0xff); /* b */
352   dst[3] = 1.0f; /* a */
353}
354