2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 * \file mipmap.c mipmap generation and teximage resizing functions.
32 #include "texcompress.h"
33 #include "texformat.h"
40 bytes_per_pixel(GLenum datatype
, GLuint comps
)
42 GLint b
= _mesa_sizeof_packed_type(datatype
);
49 * \name Support macros for do_row and do_row_3d
51 * The macro madness is here for two reasons. First, it compacts the code
52 * slightly. Second, it makes it much easier to adjust the specifics of the
53 * filter to tune the rounding characteristics.
56 #define DECLARE_ROW_POINTERS(t, e) \
57 const t(*rowA)[e] = (const t(*)[e]) srcRowA; \
58 const t(*rowB)[e] = (const t(*)[e]) srcRowB; \
59 const t(*rowC)[e] = (const t(*)[e]) srcRowC; \
60 const t(*rowD)[e] = (const t(*)[e]) srcRowD; \
61 t(*dst)[e] = (t(*)[e]) dstRow
63 #define DECLARE_ROW_POINTERS0(t) \
64 const t *rowA = (const t *) srcRowA; \
65 const t *rowB = (const t *) srcRowB; \
66 const t *rowC = (const t *) srcRowC; \
67 const t *rowD = (const t *) srcRowD; \
70 #define FILTER_SUM_3D(Aj, Ak, Bj, Bk, Cj, Ck, Dj, Dk) \
71 ((unsigned) Aj + (unsigned) Ak \
72 + (unsigned) Bj + (unsigned) Bk \
73 + (unsigned) Cj + (unsigned) Ck \
74 + (unsigned) Dj + (unsigned) Dk \
77 #define FILTER_3D(e) \
79 dst[i][e] = FILTER_SUM_3D(rowA[j][e], rowA[k][e], \
80 rowB[j][e], rowB[k][e], \
81 rowC[j][e], rowC[k][e], \
82 rowD[j][e], rowD[k][e]); \
85 #define FILTER_F_3D(e) \
87 dst[i][e] = (rowA[j][e] + rowA[k][e] \
88 + rowB[j][e] + rowB[k][e] \
89 + rowC[j][e] + rowC[k][e] \
90 + rowD[j][e] + rowD[k][e]) * 0.125F; \
93 #define FILTER_HF_3D(e) \
95 const GLfloat aj = _mesa_half_to_float(rowA[j][e]); \
96 const GLfloat ak = _mesa_half_to_float(rowA[k][e]); \
97 const GLfloat bj = _mesa_half_to_float(rowB[j][e]); \
98 const GLfloat bk = _mesa_half_to_float(rowB[k][e]); \
99 const GLfloat cj = _mesa_half_to_float(rowC[j][e]); \
100 const GLfloat ck = _mesa_half_to_float(rowC[k][e]); \
101 const GLfloat dj = _mesa_half_to_float(rowD[j][e]); \
102 const GLfloat dk = _mesa_half_to_float(rowD[k][e]); \
103 dst[i][e] = _mesa_float_to_half((aj + ak + bj + bk + cj + ck + dj + dk) \
110 * Average together two rows of a source image to produce a single new
111 * row in the dest image. It's legal for the two source rows to point
112 * to the same data. The source width must be equal to either the
113 * dest width or two times the dest width.
114 * \param datatype GL_UNSIGNED_BYTE, GL_UNSIGNED_SHORT, GL_FLOAT, etc.
115 * \param comps number of components per pixel (1..4)
118 do_row(GLenum datatype
, GLuint comps
, GLint srcWidth
,
119 const GLvoid
*srcRowA
, const GLvoid
*srcRowB
,
120 GLint dstWidth
, GLvoid
*dstRow
)
122 const GLuint k0
= (srcWidth
== dstWidth
) ? 0 : 1;
123 const GLuint colStride
= (srcWidth
== dstWidth
) ? 1 : 2;
128 /* This assertion is no longer valid with non-power-of-2 textures
129 assert(srcWidth == dstWidth || srcWidth == 2 * dstWidth);
132 if (datatype
== GL_UNSIGNED_BYTE
&& comps
== 4) {
134 const GLubyte(*rowA
)[4] = (const GLubyte(*)[4]) srcRowA
;
135 const GLubyte(*rowB
)[4] = (const GLubyte(*)[4]) srcRowB
;
136 GLubyte(*dst
)[4] = (GLubyte(*)[4]) dstRow
;
137 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
138 i
++, j
+= colStride
, k
+= colStride
) {
139 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) / 4;
140 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) / 4;
141 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] + rowB
[j
][2] + rowB
[k
][2]) / 4;
142 dst
[i
][3] = (rowA
[j
][3] + rowA
[k
][3] + rowB
[j
][3] + rowB
[k
][3]) / 4;
145 else if (datatype
== GL_UNSIGNED_BYTE
&& comps
== 3) {
147 const GLubyte(*rowA
)[3] = (const GLubyte(*)[3]) srcRowA
;
148 const GLubyte(*rowB
)[3] = (const GLubyte(*)[3]) srcRowB
;
149 GLubyte(*dst
)[3] = (GLubyte(*)[3]) dstRow
;
150 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
151 i
++, j
+= colStride
, k
+= colStride
) {
152 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) / 4;
153 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) / 4;
154 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] + rowB
[j
][2] + rowB
[k
][2]) / 4;
157 else if (datatype
== GL_UNSIGNED_BYTE
&& comps
== 2) {
159 const GLubyte(*rowA
)[2] = (const GLubyte(*)[2]) srcRowA
;
160 const GLubyte(*rowB
)[2] = (const GLubyte(*)[2]) srcRowB
;
161 GLubyte(*dst
)[2] = (GLubyte(*)[2]) dstRow
;
162 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
163 i
++, j
+= colStride
, k
+= colStride
) {
164 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) >> 2;
165 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) >> 2;
168 else if (datatype
== GL_UNSIGNED_BYTE
&& comps
== 1) {
170 const GLubyte
*rowA
= (const GLubyte
*) srcRowA
;
171 const GLubyte
*rowB
= (const GLubyte
*) srcRowB
;
172 GLubyte
*dst
= (GLubyte
*) dstRow
;
173 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
174 i
++, j
+= colStride
, k
+= colStride
) {
175 dst
[i
] = (rowA
[j
] + rowA
[k
] + rowB
[j
] + rowB
[k
]) >> 2;
179 else if (datatype
== GL_UNSIGNED_SHORT
&& comps
== 4) {
181 const GLushort(*rowA
)[4] = (const GLushort(*)[4]) srcRowA
;
182 const GLushort(*rowB
)[4] = (const GLushort(*)[4]) srcRowB
;
183 GLushort(*dst
)[4] = (GLushort(*)[4]) dstRow
;
184 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
185 i
++, j
+= colStride
, k
+= colStride
) {
186 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) / 4;
187 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) / 4;
188 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] + rowB
[j
][2] + rowB
[k
][2]) / 4;
189 dst
[i
][3] = (rowA
[j
][3] + rowA
[k
][3] + rowB
[j
][3] + rowB
[k
][3]) / 4;
192 else if (datatype
== GL_UNSIGNED_SHORT
&& comps
== 3) {
194 const GLushort(*rowA
)[3] = (const GLushort(*)[3]) srcRowA
;
195 const GLushort(*rowB
)[3] = (const GLushort(*)[3]) srcRowB
;
196 GLushort(*dst
)[3] = (GLushort(*)[3]) dstRow
;
197 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
198 i
++, j
+= colStride
, k
+= colStride
) {
199 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) / 4;
200 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) / 4;
201 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] + rowB
[j
][2] + rowB
[k
][2]) / 4;
204 else if (datatype
== GL_UNSIGNED_SHORT
&& comps
== 2) {
206 const GLushort(*rowA
)[2] = (const GLushort(*)[2]) srcRowA
;
207 const GLushort(*rowB
)[2] = (const GLushort(*)[2]) srcRowB
;
208 GLushort(*dst
)[2] = (GLushort(*)[2]) dstRow
;
209 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
210 i
++, j
+= colStride
, k
+= colStride
) {
211 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) / 4;
212 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) / 4;
215 else if (datatype
== GL_UNSIGNED_SHORT
&& comps
== 1) {
217 const GLushort
*rowA
= (const GLushort
*) srcRowA
;
218 const GLushort
*rowB
= (const GLushort
*) srcRowB
;
219 GLushort
*dst
= (GLushort
*) dstRow
;
220 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
221 i
++, j
+= colStride
, k
+= colStride
) {
222 dst
[i
] = (rowA
[j
] + rowA
[k
] + rowB
[j
] + rowB
[k
]) / 4;
226 else if (datatype
== GL_FLOAT
&& comps
== 4) {
228 const GLfloat(*rowA
)[4] = (const GLfloat(*)[4]) srcRowA
;
229 const GLfloat(*rowB
)[4] = (const GLfloat(*)[4]) srcRowB
;
230 GLfloat(*dst
)[4] = (GLfloat(*)[4]) dstRow
;
231 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
232 i
++, j
+= colStride
, k
+= colStride
) {
233 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] +
234 rowB
[j
][0] + rowB
[k
][0]) * 0.25F
;
235 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] +
236 rowB
[j
][1] + rowB
[k
][1]) * 0.25F
;
237 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] +
238 rowB
[j
][2] + rowB
[k
][2]) * 0.25F
;
239 dst
[i
][3] = (rowA
[j
][3] + rowA
[k
][3] +
240 rowB
[j
][3] + rowB
[k
][3]) * 0.25F
;
243 else if (datatype
== GL_FLOAT
&& comps
== 3) {
245 const GLfloat(*rowA
)[3] = (const GLfloat(*)[3]) srcRowA
;
246 const GLfloat(*rowB
)[3] = (const GLfloat(*)[3]) srcRowB
;
247 GLfloat(*dst
)[3] = (GLfloat(*)[3]) dstRow
;
248 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
249 i
++, j
+= colStride
, k
+= colStride
) {
250 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] +
251 rowB
[j
][0] + rowB
[k
][0]) * 0.25F
;
252 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] +
253 rowB
[j
][1] + rowB
[k
][1]) * 0.25F
;
254 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] +
255 rowB
[j
][2] + rowB
[k
][2]) * 0.25F
;
258 else if (datatype
== GL_FLOAT
&& comps
== 2) {
260 const GLfloat(*rowA
)[2] = (const GLfloat(*)[2]) srcRowA
;
261 const GLfloat(*rowB
)[2] = (const GLfloat(*)[2]) srcRowB
;
262 GLfloat(*dst
)[2] = (GLfloat(*)[2]) dstRow
;
263 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
264 i
++, j
+= colStride
, k
+= colStride
) {
265 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] +
266 rowB
[j
][0] + rowB
[k
][0]) * 0.25F
;
267 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] +
268 rowB
[j
][1] + rowB
[k
][1]) * 0.25F
;
271 else if (datatype
== GL_FLOAT
&& comps
== 1) {
273 const GLfloat
*rowA
= (const GLfloat
*) srcRowA
;
274 const GLfloat
*rowB
= (const GLfloat
*) srcRowB
;
275 GLfloat
*dst
= (GLfloat
*) dstRow
;
276 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
277 i
++, j
+= colStride
, k
+= colStride
) {
278 dst
[i
] = (rowA
[j
] + rowA
[k
] + rowB
[j
] + rowB
[k
]) * 0.25F
;
282 else if (datatype
== GL_HALF_FLOAT_ARB
&& comps
== 4) {
283 GLuint i
, j
, k
, comp
;
284 const GLhalfARB(*rowA
)[4] = (const GLhalfARB(*)[4]) srcRowA
;
285 const GLhalfARB(*rowB
)[4] = (const GLhalfARB(*)[4]) srcRowB
;
286 GLhalfARB(*dst
)[4] = (GLhalfARB(*)[4]) dstRow
;
287 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
288 i
++, j
+= colStride
, k
+= colStride
) {
289 for (comp
= 0; comp
< 4; comp
++) {
290 GLfloat aj
, ak
, bj
, bk
;
291 aj
= _mesa_half_to_float(rowA
[j
][comp
]);
292 ak
= _mesa_half_to_float(rowA
[k
][comp
]);
293 bj
= _mesa_half_to_float(rowB
[j
][comp
]);
294 bk
= _mesa_half_to_float(rowB
[k
][comp
]);
295 dst
[i
][comp
] = _mesa_float_to_half((aj
+ ak
+ bj
+ bk
) * 0.25F
);
299 else if (datatype
== GL_HALF_FLOAT_ARB
&& comps
== 3) {
300 GLuint i
, j
, k
, comp
;
301 const GLhalfARB(*rowA
)[3] = (const GLhalfARB(*)[3]) srcRowA
;
302 const GLhalfARB(*rowB
)[3] = (const GLhalfARB(*)[3]) srcRowB
;
303 GLhalfARB(*dst
)[3] = (GLhalfARB(*)[3]) dstRow
;
304 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
305 i
++, j
+= colStride
, k
+= colStride
) {
306 for (comp
= 0; comp
< 3; comp
++) {
307 GLfloat aj
, ak
, bj
, bk
;
308 aj
= _mesa_half_to_float(rowA
[j
][comp
]);
309 ak
= _mesa_half_to_float(rowA
[k
][comp
]);
310 bj
= _mesa_half_to_float(rowB
[j
][comp
]);
311 bk
= _mesa_half_to_float(rowB
[k
][comp
]);
312 dst
[i
][comp
] = _mesa_float_to_half((aj
+ ak
+ bj
+ bk
) * 0.25F
);
316 else if (datatype
== GL_HALF_FLOAT_ARB
&& comps
== 2) {
317 GLuint i
, j
, k
, comp
;
318 const GLhalfARB(*rowA
)[2] = (const GLhalfARB(*)[2]) srcRowA
;
319 const GLhalfARB(*rowB
)[2] = (const GLhalfARB(*)[2]) srcRowB
;
320 GLhalfARB(*dst
)[2] = (GLhalfARB(*)[2]) dstRow
;
321 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
322 i
++, j
+= colStride
, k
+= colStride
) {
323 for (comp
= 0; comp
< 2; comp
++) {
324 GLfloat aj
, ak
, bj
, bk
;
325 aj
= _mesa_half_to_float(rowA
[j
][comp
]);
326 ak
= _mesa_half_to_float(rowA
[k
][comp
]);
327 bj
= _mesa_half_to_float(rowB
[j
][comp
]);
328 bk
= _mesa_half_to_float(rowB
[k
][comp
]);
329 dst
[i
][comp
] = _mesa_float_to_half((aj
+ ak
+ bj
+ bk
) * 0.25F
);
333 else if (datatype
== GL_HALF_FLOAT_ARB
&& comps
== 1) {
335 const GLhalfARB
*rowA
= (const GLhalfARB
*) srcRowA
;
336 const GLhalfARB
*rowB
= (const GLhalfARB
*) srcRowB
;
337 GLhalfARB
*dst
= (GLhalfARB
*) dstRow
;
338 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
339 i
++, j
+= colStride
, k
+= colStride
) {
340 GLfloat aj
, ak
, bj
, bk
;
341 aj
= _mesa_half_to_float(rowA
[j
]);
342 ak
= _mesa_half_to_float(rowA
[k
]);
343 bj
= _mesa_half_to_float(rowB
[j
]);
344 bk
= _mesa_half_to_float(rowB
[k
]);
345 dst
[i
] = _mesa_float_to_half((aj
+ ak
+ bj
+ bk
) * 0.25F
);
349 else if (datatype
== GL_UNSIGNED_INT
&& comps
== 1) {
351 const GLuint
*rowA
= (const GLuint
*) srcRowA
;
352 const GLuint
*rowB
= (const GLuint
*) srcRowB
;
353 GLfloat
*dst
= (GLfloat
*) dstRow
;
354 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
355 i
++, j
+= colStride
, k
+= colStride
) {
356 dst
[i
] = (GLfloat
)(rowA
[j
] / 4 + rowA
[k
] / 4 + rowB
[j
] / 4 + rowB
[k
] / 4);
360 else if (datatype
== GL_UNSIGNED_SHORT_5_6_5
&& comps
== 3) {
362 const GLushort
*rowA
= (const GLushort
*) srcRowA
;
363 const GLushort
*rowB
= (const GLushort
*) srcRowB
;
364 GLushort
*dst
= (GLushort
*) dstRow
;
365 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
366 i
++, j
+= colStride
, k
+= colStride
) {
367 const GLint rowAr0
= rowA
[j
] & 0x1f;
368 const GLint rowAr1
= rowA
[k
] & 0x1f;
369 const GLint rowBr0
= rowB
[j
] & 0x1f;
370 const GLint rowBr1
= rowB
[k
] & 0x1f;
371 const GLint rowAg0
= (rowA
[j
] >> 5) & 0x3f;
372 const GLint rowAg1
= (rowA
[k
] >> 5) & 0x3f;
373 const GLint rowBg0
= (rowB
[j
] >> 5) & 0x3f;
374 const GLint rowBg1
= (rowB
[k
] >> 5) & 0x3f;
375 const GLint rowAb0
= (rowA
[j
] >> 11) & 0x1f;
376 const GLint rowAb1
= (rowA
[k
] >> 11) & 0x1f;
377 const GLint rowBb0
= (rowB
[j
] >> 11) & 0x1f;
378 const GLint rowBb1
= (rowB
[k
] >> 11) & 0x1f;
379 const GLint red
= (rowAr0
+ rowAr1
+ rowBr0
+ rowBr1
) >> 2;
380 const GLint green
= (rowAg0
+ rowAg1
+ rowBg0
+ rowBg1
) >> 2;
381 const GLint blue
= (rowAb0
+ rowAb1
+ rowBb0
+ rowBb1
) >> 2;
382 dst
[i
] = (blue
<< 11) | (green
<< 5) | red
;
385 else if (datatype
== GL_UNSIGNED_SHORT_4_4_4_4
&& comps
== 4) {
387 const GLushort
*rowA
= (const GLushort
*) srcRowA
;
388 const GLushort
*rowB
= (const GLushort
*) srcRowB
;
389 GLushort
*dst
= (GLushort
*) dstRow
;
390 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
391 i
++, j
+= colStride
, k
+= colStride
) {
392 const GLint rowAr0
= rowA
[j
] & 0xf;
393 const GLint rowAr1
= rowA
[k
] & 0xf;
394 const GLint rowBr0
= rowB
[j
] & 0xf;
395 const GLint rowBr1
= rowB
[k
] & 0xf;
396 const GLint rowAg0
= (rowA
[j
] >> 4) & 0xf;
397 const GLint rowAg1
= (rowA
[k
] >> 4) & 0xf;
398 const GLint rowBg0
= (rowB
[j
] >> 4) & 0xf;
399 const GLint rowBg1
= (rowB
[k
] >> 4) & 0xf;
400 const GLint rowAb0
= (rowA
[j
] >> 8) & 0xf;
401 const GLint rowAb1
= (rowA
[k
] >> 8) & 0xf;
402 const GLint rowBb0
= (rowB
[j
] >> 8) & 0xf;
403 const GLint rowBb1
= (rowB
[k
] >> 8) & 0xf;
404 const GLint rowAa0
= (rowA
[j
] >> 12) & 0xf;
405 const GLint rowAa1
= (rowA
[k
] >> 12) & 0xf;
406 const GLint rowBa0
= (rowB
[j
] >> 12) & 0xf;
407 const GLint rowBa1
= (rowB
[k
] >> 12) & 0xf;
408 const GLint red
= (rowAr0
+ rowAr1
+ rowBr0
+ rowBr1
) >> 2;
409 const GLint green
= (rowAg0
+ rowAg1
+ rowBg0
+ rowBg1
) >> 2;
410 const GLint blue
= (rowAb0
+ rowAb1
+ rowBb0
+ rowBb1
) >> 2;
411 const GLint alpha
= (rowAa0
+ rowAa1
+ rowBa0
+ rowBa1
) >> 2;
412 dst
[i
] = (alpha
<< 12) | (blue
<< 8) | (green
<< 4) | red
;
415 else if (datatype
== GL_UNSIGNED_SHORT_1_5_5_5_REV
&& comps
== 4) {
417 const GLushort
*rowA
= (const GLushort
*) srcRowA
;
418 const GLushort
*rowB
= (const GLushort
*) srcRowB
;
419 GLushort
*dst
= (GLushort
*) dstRow
;
420 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
421 i
++, j
+= colStride
, k
+= colStride
) {
422 const GLint rowAr0
= rowA
[j
] & 0x1f;
423 const GLint rowAr1
= rowA
[k
] & 0x1f;
424 const GLint rowBr0
= rowB
[j
] & 0x1f;
425 const GLint rowBr1
= rowB
[k
] & 0x1f;
426 const GLint rowAg0
= (rowA
[j
] >> 5) & 0x1f;
427 const GLint rowAg1
= (rowA
[k
] >> 5) & 0x1f;
428 const GLint rowBg0
= (rowB
[j
] >> 5) & 0x1f;
429 const GLint rowBg1
= (rowB
[k
] >> 5) & 0x1f;
430 const GLint rowAb0
= (rowA
[j
] >> 10) & 0x1f;
431 const GLint rowAb1
= (rowA
[k
] >> 10) & 0x1f;
432 const GLint rowBb0
= (rowB
[j
] >> 10) & 0x1f;
433 const GLint rowBb1
= (rowB
[k
] >> 10) & 0x1f;
434 const GLint rowAa0
= (rowA
[j
] >> 15) & 0x1;
435 const GLint rowAa1
= (rowA
[k
] >> 15) & 0x1;
436 const GLint rowBa0
= (rowB
[j
] >> 15) & 0x1;
437 const GLint rowBa1
= (rowB
[k
] >> 15) & 0x1;
438 const GLint red
= (rowAr0
+ rowAr1
+ rowBr0
+ rowBr1
) >> 2;
439 const GLint green
= (rowAg0
+ rowAg1
+ rowBg0
+ rowBg1
) >> 2;
440 const GLint blue
= (rowAb0
+ rowAb1
+ rowBb0
+ rowBb1
) >> 2;
441 const GLint alpha
= (rowAa0
+ rowAa1
+ rowBa0
+ rowBa1
) >> 2;
442 dst
[i
] = (alpha
<< 15) | (blue
<< 10) | (green
<< 5) | red
;
445 else if (datatype
== GL_UNSIGNED_BYTE_3_3_2
&& comps
== 3) {
447 const GLubyte
*rowA
= (const GLubyte
*) srcRowA
;
448 const GLubyte
*rowB
= (const GLubyte
*) srcRowB
;
449 GLubyte
*dst
= (GLubyte
*) dstRow
;
450 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
451 i
++, j
+= colStride
, k
+= colStride
) {
452 const GLint rowAr0
= rowA
[j
] & 0x3;
453 const GLint rowAr1
= rowA
[k
] & 0x3;
454 const GLint rowBr0
= rowB
[j
] & 0x3;
455 const GLint rowBr1
= rowB
[k
] & 0x3;
456 const GLint rowAg0
= (rowA
[j
] >> 2) & 0x7;
457 const GLint rowAg1
= (rowA
[k
] >> 2) & 0x7;
458 const GLint rowBg0
= (rowB
[j
] >> 2) & 0x7;
459 const GLint rowBg1
= (rowB
[k
] >> 2) & 0x7;
460 const GLint rowAb0
= (rowA
[j
] >> 5) & 0x7;
461 const GLint rowAb1
= (rowA
[k
] >> 5) & 0x7;
462 const GLint rowBb0
= (rowB
[j
] >> 5) & 0x7;
463 const GLint rowBb1
= (rowB
[k
] >> 5) & 0x7;
464 const GLint red
= (rowAr0
+ rowAr1
+ rowBr0
+ rowBr1
) >> 2;
465 const GLint green
= (rowAg0
+ rowAg1
+ rowBg0
+ rowBg1
) >> 2;
466 const GLint blue
= (rowAb0
+ rowAb1
+ rowBb0
+ rowBb1
) >> 2;
467 dst
[i
] = (blue
<< 5) | (green
<< 2) | red
;
471 _mesa_problem(NULL
, "bad format in do_row()");
477 * Average together four rows of a source image to produce a single new
478 * row in the dest image. It's legal for the two source rows to point
479 * to the same data. The source width must be equal to either the
480 * dest width or two times the dest width.
482 * \param datatype GL pixel type \c GL_UNSIGNED_BYTE, \c GL_UNSIGNED_SHORT,
484 * \param comps number of components per pixel (1..4)
485 * \param srcWidth Width of a row in the source data
486 * \param srcRowA Pointer to one of the rows of source data
487 * \param srcRowB Pointer to one of the rows of source data
488 * \param srcRowC Pointer to one of the rows of source data
489 * \param srcRowD Pointer to one of the rows of source data
490 * \param dstWidth Width of a row in the destination data
491 * \param srcRowA Pointer to the row of destination data
494 do_row_3D(GLenum datatype
, GLuint comps
, GLint srcWidth
,
495 const GLvoid
*srcRowA
, const GLvoid
*srcRowB
,
496 const GLvoid
*srcRowC
, const GLvoid
*srcRowD
,
497 GLint dstWidth
, GLvoid
*dstRow
)
499 const GLuint k0
= (srcWidth
== dstWidth
) ? 0 : 1;
500 const GLuint colStride
= (srcWidth
== dstWidth
) ? 1 : 2;
506 if ((datatype
== GL_UNSIGNED_BYTE
) && (comps
== 4)) {
507 DECLARE_ROW_POINTERS(GLubyte
, 4);
509 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
510 i
++, j
+= colStride
, k
+= colStride
) {
517 else if ((datatype
== GL_UNSIGNED_BYTE
) && (comps
== 3)) {
518 DECLARE_ROW_POINTERS(GLubyte
, 3);
520 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
521 i
++, j
+= colStride
, k
+= colStride
) {
527 else if ((datatype
== GL_UNSIGNED_BYTE
) && (comps
== 2)) {
528 DECLARE_ROW_POINTERS(GLubyte
, 2);
530 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
531 i
++, j
+= colStride
, k
+= colStride
) {
536 else if ((datatype
== GL_UNSIGNED_BYTE
) && (comps
== 1)) {
537 DECLARE_ROW_POINTERS(GLubyte
, 1);
539 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
540 i
++, j
+= colStride
, k
+= colStride
) {
544 else if ((datatype
== GL_UNSIGNED_SHORT
) && (comps
== 4)) {
545 DECLARE_ROW_POINTERS(GLushort
, 4);
547 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
548 i
++, j
+= colStride
, k
+= colStride
) {
555 else if ((datatype
== GL_UNSIGNED_SHORT
) && (comps
== 3)) {
556 DECLARE_ROW_POINTERS(GLushort
, 3);
558 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
559 i
++, j
+= colStride
, k
+= colStride
) {
565 else if ((datatype
== GL_UNSIGNED_SHORT
) && (comps
== 2)) {
566 DECLARE_ROW_POINTERS(GLushort
, 2);
568 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
569 i
++, j
+= colStride
, k
+= colStride
) {
574 else if ((datatype
== GL_UNSIGNED_SHORT
) && (comps
== 1)) {
575 DECLARE_ROW_POINTERS(GLushort
, 1);
577 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
578 i
++, j
+= colStride
, k
+= colStride
) {
582 else if ((datatype
== GL_FLOAT
) && (comps
== 4)) {
583 DECLARE_ROW_POINTERS(GLfloat
, 4);
585 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
586 i
++, j
+= colStride
, k
+= colStride
) {
593 else if ((datatype
== GL_FLOAT
) && (comps
== 3)) {
594 DECLARE_ROW_POINTERS(GLfloat
, 3);
596 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
597 i
++, j
+= colStride
, k
+= colStride
) {
603 else if ((datatype
== GL_FLOAT
) && (comps
== 2)) {
604 DECLARE_ROW_POINTERS(GLfloat
, 2);
606 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
607 i
++, j
+= colStride
, k
+= colStride
) {
612 else if ((datatype
== GL_FLOAT
) && (comps
== 1)) {
613 DECLARE_ROW_POINTERS(GLfloat
, 1);
615 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
616 i
++, j
+= colStride
, k
+= colStride
) {
620 else if ((datatype
== GL_HALF_FLOAT_ARB
) && (comps
== 4)) {
621 DECLARE_ROW_POINTERS(GLhalfARB
, 4);
623 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
624 i
++, j
+= colStride
, k
+= colStride
) {
631 else if ((datatype
== GL_HALF_FLOAT_ARB
) && (comps
== 3)) {
632 DECLARE_ROW_POINTERS(GLhalfARB
, 4);
634 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
635 i
++, j
+= colStride
, k
+= colStride
) {
641 else if ((datatype
== GL_HALF_FLOAT_ARB
) && (comps
== 2)) {
642 DECLARE_ROW_POINTERS(GLhalfARB
, 4);
644 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
645 i
++, j
+= colStride
, k
+= colStride
) {
650 else if ((datatype
== GL_HALF_FLOAT_ARB
) && (comps
== 1)) {
651 DECLARE_ROW_POINTERS(GLhalfARB
, 4);
653 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
654 i
++, j
+= colStride
, k
+= colStride
) {
658 else if ((datatype
== GL_UNSIGNED_INT
) && (comps
== 1)) {
659 const GLuint
*rowA
= (const GLuint
*) srcRowA
;
660 const GLuint
*rowB
= (const GLuint
*) srcRowB
;
661 const GLuint
*rowC
= (const GLuint
*) srcRowC
;
662 const GLuint
*rowD
= (const GLuint
*) srcRowD
;
663 GLfloat
*dst
= (GLfloat
*) dstRow
;
665 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
666 i
++, j
+= colStride
, k
+= colStride
) {
667 const uint64_t tmp
= (((uint64_t) rowA
[j
] + (uint64_t) rowA
[k
])
668 + ((uint64_t) rowB
[j
] + (uint64_t) rowB
[k
])
669 + ((uint64_t) rowC
[j
] + (uint64_t) rowC
[k
])
670 + ((uint64_t) rowD
[j
] + (uint64_t) rowD
[k
]));
671 dst
[i
] = (GLfloat
)((double) tmp
* 0.125);
674 else if ((datatype
== GL_UNSIGNED_SHORT_5_6_5
) && (comps
== 3)) {
675 DECLARE_ROW_POINTERS0(GLushort
);
677 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
678 i
++, j
+= colStride
, k
+= colStride
) {
679 const GLint rowAr0
= rowA
[j
] & 0x1f;
680 const GLint rowAr1
= rowA
[k
] & 0x1f;
681 const GLint rowBr0
= rowB
[j
] & 0x1f;
682 const GLint rowBr1
= rowB
[k
] & 0x1f;
683 const GLint rowCr0
= rowC
[j
] & 0x1f;
684 const GLint rowCr1
= rowC
[k
] & 0x1f;
685 const GLint rowDr0
= rowD
[j
] & 0x1f;
686 const GLint rowDr1
= rowD
[k
] & 0x1f;
687 const GLint rowAg0
= (rowA
[j
] >> 5) & 0x3f;
688 const GLint rowAg1
= (rowA
[k
] >> 5) & 0x3f;
689 const GLint rowBg0
= (rowB
[j
] >> 5) & 0x3f;
690 const GLint rowBg1
= (rowB
[k
] >> 5) & 0x3f;
691 const GLint rowCg0
= (rowC
[j
] >> 5) & 0x3f;
692 const GLint rowCg1
= (rowC
[k
] >> 5) & 0x3f;
693 const GLint rowDg0
= (rowD
[j
] >> 5) & 0x3f;
694 const GLint rowDg1
= (rowD
[k
] >> 5) & 0x3f;
695 const GLint rowAb0
= (rowA
[j
] >> 11) & 0x1f;
696 const GLint rowAb1
= (rowA
[k
] >> 11) & 0x1f;
697 const GLint rowBb0
= (rowB
[j
] >> 11) & 0x1f;
698 const GLint rowBb1
= (rowB
[k
] >> 11) & 0x1f;
699 const GLint rowCb0
= (rowC
[j
] >> 11) & 0x1f;
700 const GLint rowCb1
= (rowC
[k
] >> 11) & 0x1f;
701 const GLint rowDb0
= (rowD
[j
] >> 11) & 0x1f;
702 const GLint rowDb1
= (rowD
[k
] >> 11) & 0x1f;
703 const GLint r
= FILTER_SUM_3D(rowAr0
, rowAr1
, rowBr0
, rowBr1
,
704 rowCr0
, rowCr1
, rowDr0
, rowDr1
);
705 const GLint g
= FILTER_SUM_3D(rowAg0
, rowAg1
, rowBg0
, rowBg1
,
706 rowCg0
, rowCg1
, rowDg0
, rowDg1
);
707 const GLint b
= FILTER_SUM_3D(rowAb0
, rowAb1
, rowBb0
, rowBb1
,
708 rowCb0
, rowCb1
, rowDb0
, rowDb1
);
709 dst
[i
] = (b
<< 11) | (g
<< 5) | r
;
712 else if ((datatype
== GL_UNSIGNED_SHORT_4_4_4_4
) && (comps
== 4)) {
713 DECLARE_ROW_POINTERS0(GLushort
);
715 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
716 i
++, j
+= colStride
, k
+= colStride
) {
717 const GLint rowAr0
= rowA
[j
] & 0xf;
718 const GLint rowAr1
= rowA
[k
] & 0xf;
719 const GLint rowBr0
= rowB
[j
] & 0xf;
720 const GLint rowBr1
= rowB
[k
] & 0xf;
721 const GLint rowCr0
= rowC
[j
] & 0xf;
722 const GLint rowCr1
= rowC
[k
] & 0xf;
723 const GLint rowDr0
= rowD
[j
] & 0xf;
724 const GLint rowDr1
= rowD
[k
] & 0xf;
725 const GLint rowAg0
= (rowA
[j
] >> 4) & 0xf;
726 const GLint rowAg1
= (rowA
[k
] >> 4) & 0xf;
727 const GLint rowBg0
= (rowB
[j
] >> 4) & 0xf;
728 const GLint rowBg1
= (rowB
[k
] >> 4) & 0xf;
729 const GLint rowCg0
= (rowC
[j
] >> 4) & 0xf;
730 const GLint rowCg1
= (rowC
[k
] >> 4) & 0xf;
731 const GLint rowDg0
= (rowD
[j
] >> 4) & 0xf;
732 const GLint rowDg1
= (rowD
[k
] >> 4) & 0xf;
733 const GLint rowAb0
= (rowA
[j
] >> 8) & 0xf;
734 const GLint rowAb1
= (rowA
[k
] >> 8) & 0xf;
735 const GLint rowBb0
= (rowB
[j
] >> 8) & 0xf;
736 const GLint rowBb1
= (rowB
[k
] >> 8) & 0xf;
737 const GLint rowCb0
= (rowC
[j
] >> 8) & 0xf;
738 const GLint rowCb1
= (rowC
[k
] >> 8) & 0xf;
739 const GLint rowDb0
= (rowD
[j
] >> 8) & 0xf;
740 const GLint rowDb1
= (rowD
[k
] >> 8) & 0xf;
741 const GLint rowAa0
= (rowA
[j
] >> 12) & 0xf;
742 const GLint rowAa1
= (rowA
[k
] >> 12) & 0xf;
743 const GLint rowBa0
= (rowB
[j
] >> 12) & 0xf;
744 const GLint rowBa1
= (rowB
[k
] >> 12) & 0xf;
745 const GLint rowCa0
= (rowC
[j
] >> 12) & 0xf;
746 const GLint rowCa1
= (rowC
[k
] >> 12) & 0xf;
747 const GLint rowDa0
= (rowD
[j
] >> 12) & 0xf;
748 const GLint rowDa1
= (rowD
[k
] >> 12) & 0xf;
749 const GLint r
= FILTER_SUM_3D(rowAr0
, rowAr1
, rowBr0
, rowBr1
,
750 rowCr0
, rowCr1
, rowDr0
, rowDr1
);
751 const GLint g
= FILTER_SUM_3D(rowAg0
, rowAg1
, rowBg0
, rowBg1
,
752 rowCg0
, rowCg1
, rowDg0
, rowDg1
);
753 const GLint b
= FILTER_SUM_3D(rowAb0
, rowAb1
, rowBb0
, rowBb1
,
754 rowCb0
, rowCb1
, rowDb0
, rowDb1
);
755 const GLint a
= FILTER_SUM_3D(rowAa0
, rowAa1
, rowBa0
, rowBa1
,
756 rowCa0
, rowCa1
, rowDa0
, rowDa1
);
758 dst
[i
] = (a
<< 12) | (b
<< 8) | (g
<< 4) | r
;
761 else if ((datatype
== GL_UNSIGNED_SHORT_1_5_5_5_REV
) && (comps
== 4)) {
762 DECLARE_ROW_POINTERS0(GLushort
);
764 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
765 i
++, j
+= colStride
, k
+= colStride
) {
766 const GLint rowAr0
= rowA
[j
] & 0x1f;
767 const GLint rowAr1
= rowA
[k
] & 0x1f;
768 const GLint rowBr0
= rowB
[j
] & 0x1f;
769 const GLint rowBr1
= rowB
[k
] & 0x1f;
770 const GLint rowCr0
= rowC
[j
] & 0x1f;
771 const GLint rowCr1
= rowC
[k
] & 0x1f;
772 const GLint rowDr0
= rowD
[j
] & 0x1f;
773 const GLint rowDr1
= rowD
[k
] & 0x1f;
774 const GLint rowAg0
= (rowA
[j
] >> 5) & 0x1f;
775 const GLint rowAg1
= (rowA
[k
] >> 5) & 0x1f;
776 const GLint rowBg0
= (rowB
[j
] >> 5) & 0x1f;
777 const GLint rowBg1
= (rowB
[k
] >> 5) & 0x1f;
778 const GLint rowCg0
= (rowC
[j
] >> 5) & 0x1f;
779 const GLint rowCg1
= (rowC
[k
] >> 5) & 0x1f;
780 const GLint rowDg0
= (rowD
[j
] >> 5) & 0x1f;
781 const GLint rowDg1
= (rowD
[k
] >> 5) & 0x1f;
782 const GLint rowAb0
= (rowA
[j
] >> 10) & 0x1f;
783 const GLint rowAb1
= (rowA
[k
] >> 10) & 0x1f;
784 const GLint rowBb0
= (rowB
[j
] >> 10) & 0x1f;
785 const GLint rowBb1
= (rowB
[k
] >> 10) & 0x1f;
786 const GLint rowCb0
= (rowC
[j
] >> 10) & 0x1f;
787 const GLint rowCb1
= (rowC
[k
] >> 10) & 0x1f;
788 const GLint rowDb0
= (rowD
[j
] >> 10) & 0x1f;
789 const GLint rowDb1
= (rowD
[k
] >> 10) & 0x1f;
790 const GLint rowAa0
= (rowA
[j
] >> 15) & 0x1;
791 const GLint rowAa1
= (rowA
[k
] >> 15) & 0x1;
792 const GLint rowBa0
= (rowB
[j
] >> 15) & 0x1;
793 const GLint rowBa1
= (rowB
[k
] >> 15) & 0x1;
794 const GLint rowCa0
= (rowC
[j
] >> 15) & 0x1;
795 const GLint rowCa1
= (rowC
[k
] >> 15) & 0x1;
796 const GLint rowDa0
= (rowD
[j
] >> 15) & 0x1;
797 const GLint rowDa1
= (rowD
[k
] >> 15) & 0x1;
798 const GLint r
= FILTER_SUM_3D(rowAr0
, rowAr1
, rowBr0
, rowBr1
,
799 rowCr0
, rowCr1
, rowDr0
, rowDr1
);
800 const GLint g
= FILTER_SUM_3D(rowAg0
, rowAg1
, rowBg0
, rowBg1
,
801 rowCg0
, rowCg1
, rowDg0
, rowDg1
);
802 const GLint b
= FILTER_SUM_3D(rowAb0
, rowAb1
, rowBb0
, rowBb1
,
803 rowCb0
, rowCb1
, rowDb0
, rowDb1
);
804 const GLint a
= FILTER_SUM_3D(rowAa0
, rowAa1
, rowBa0
, rowBa1
,
805 rowCa0
, rowCa1
, rowDa0
, rowDa1
);
807 dst
[i
] = (a
<< 15) | (b
<< 10) | (g
<< 5) | r
;
810 else if ((datatype
== GL_UNSIGNED_BYTE_3_3_2
) && (comps
== 3)) {
811 DECLARE_ROW_POINTERS0(GLushort
);
813 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
814 i
++, j
+= colStride
, k
+= colStride
) {
815 const GLint rowAr0
= rowA
[j
] & 0x3;
816 const GLint rowAr1
= rowA
[k
] & 0x3;
817 const GLint rowBr0
= rowB
[j
] & 0x3;
818 const GLint rowBr1
= rowB
[k
] & 0x3;
819 const GLint rowCr0
= rowC
[j
] & 0x3;
820 const GLint rowCr1
= rowC
[k
] & 0x3;
821 const GLint rowDr0
= rowD
[j
] & 0x3;
822 const GLint rowDr1
= rowD
[k
] & 0x3;
823 const GLint rowAg0
= (rowA
[j
] >> 2) & 0x7;
824 const GLint rowAg1
= (rowA
[k
] >> 2) & 0x7;
825 const GLint rowBg0
= (rowB
[j
] >> 2) & 0x7;
826 const GLint rowBg1
= (rowB
[k
] >> 2) & 0x7;
827 const GLint rowCg0
= (rowC
[j
] >> 2) & 0x7;
828 const GLint rowCg1
= (rowC
[k
] >> 2) & 0x7;
829 const GLint rowDg0
= (rowD
[j
] >> 2) & 0x7;
830 const GLint rowDg1
= (rowD
[k
] >> 2) & 0x7;
831 const GLint rowAb0
= (rowA
[j
] >> 5) & 0x7;
832 const GLint rowAb1
= (rowA
[k
] >> 5) & 0x7;
833 const GLint rowBb0
= (rowB
[j
] >> 5) & 0x7;
834 const GLint rowBb1
= (rowB
[k
] >> 5) & 0x7;
835 const GLint rowCb0
= (rowC
[j
] >> 5) & 0x7;
836 const GLint rowCb1
= (rowC
[k
] >> 5) & 0x7;
837 const GLint rowDb0
= (rowD
[j
] >> 5) & 0x7;
838 const GLint rowDb1
= (rowD
[k
] >> 5) & 0x7;
839 const GLint r
= FILTER_SUM_3D(rowAr0
, rowAr1
, rowBr0
, rowBr1
,
840 rowCr0
, rowCr1
, rowDr0
, rowDr1
);
841 const GLint g
= FILTER_SUM_3D(rowAg0
, rowAg1
, rowBg0
, rowBg1
,
842 rowCg0
, rowCg1
, rowDg0
, rowDg1
);
843 const GLint b
= FILTER_SUM_3D(rowAb0
, rowAb1
, rowBb0
, rowBb1
,
844 rowCb0
, rowCb1
, rowDb0
, rowDb1
);
845 dst
[i
] = (b
<< 5) | (g
<< 2) | r
;
849 _mesa_problem(NULL
, "bad format in do_row()");
855 * These functions generate a 1/2-size mipmap image from a source image.
856 * Texture borders are handled by copying or averaging the source image's
857 * border texels, depending on the scale-down factor.
861 make_1d_mipmap(GLenum datatype
, GLuint comps
, GLint border
,
862 GLint srcWidth
, const GLubyte
*srcPtr
,
863 GLint dstWidth
, GLubyte
*dstPtr
)
865 const GLint bpt
= bytes_per_pixel(datatype
, comps
);
869 /* skip the border pixel, if any */
870 src
= srcPtr
+ border
* bpt
;
871 dst
= dstPtr
+ border
* bpt
;
873 /* we just duplicate the input row, kind of hack, saves code */
874 do_row(datatype
, comps
, srcWidth
- 2 * border
, src
, src
,
875 dstWidth
- 2 * border
, dst
);
878 /* copy left-most pixel from source */
879 MEMCPY(dstPtr
, srcPtr
, bpt
);
880 /* copy right-most pixel from source */
881 MEMCPY(dstPtr
+ (dstWidth
- 1) * bpt
,
882 srcPtr
+ (srcWidth
- 1) * bpt
,
889 make_2d_mipmap(GLenum datatype
, GLuint comps
, GLint border
,
890 GLint srcWidth
, GLint srcHeight
,
891 const GLubyte
*srcPtr
, GLint srcRowStride
,
892 GLint dstWidth
, GLint dstHeight
,
893 GLubyte
*dstPtr
, GLint dstRowStride
)
895 const GLint bpt
= bytes_per_pixel(datatype
, comps
);
896 const GLint srcWidthNB
= srcWidth
- 2 * border
; /* sizes w/out border */
897 const GLint dstWidthNB
= dstWidth
- 2 * border
;
898 const GLint dstHeightNB
= dstHeight
- 2 * border
;
899 const GLint srcRowBytes
= bpt
* srcRowStride
;
900 const GLint dstRowBytes
= bpt
* dstRowStride
;
901 const GLubyte
*srcA
, *srcB
;
905 /* Compute src and dst pointers, skipping any border */
906 srcA
= srcPtr
+ border
* ((srcWidth
+ 1) * bpt
);
908 srcB
= srcA
+ srcRowBytes
;
911 dst
= dstPtr
+ border
* ((dstWidth
+ 1) * bpt
);
913 for (row
= 0; row
< dstHeightNB
; row
++) {
914 do_row(datatype
, comps
, srcWidthNB
, srcA
, srcB
,
916 srcA
+= 2 * srcRowBytes
;
917 srcB
+= 2 * srcRowBytes
;
921 /* This is ugly but probably won't be used much */
923 /* fill in dest border */
924 /* lower-left border pixel */
925 MEMCPY(dstPtr
, srcPtr
, bpt
);
926 /* lower-right border pixel */
927 MEMCPY(dstPtr
+ (dstWidth
- 1) * bpt
,
928 srcPtr
+ (srcWidth
- 1) * bpt
, bpt
);
929 /* upper-left border pixel */
930 MEMCPY(dstPtr
+ dstWidth
* (dstHeight
- 1) * bpt
,
931 srcPtr
+ srcWidth
* (srcHeight
- 1) * bpt
, bpt
);
932 /* upper-right border pixel */
933 MEMCPY(dstPtr
+ (dstWidth
* dstHeight
- 1) * bpt
,
934 srcPtr
+ (srcWidth
* srcHeight
- 1) * bpt
, bpt
);
936 do_row(datatype
, comps
, srcWidthNB
,
939 dstWidthNB
, dstPtr
+ bpt
);
941 do_row(datatype
, comps
, srcWidthNB
,
942 srcPtr
+ (srcWidth
* (srcHeight
- 1) + 1) * bpt
,
943 srcPtr
+ (srcWidth
* (srcHeight
- 1) + 1) * bpt
,
945 dstPtr
+ (dstWidth
* (dstHeight
- 1) + 1) * bpt
);
946 /* left and right borders */
947 if (srcHeight
== dstHeight
) {
948 /* copy border pixel from src to dst */
949 for (row
= 1; row
< srcHeight
; row
++) {
950 MEMCPY(dstPtr
+ dstWidth
* row
* bpt
,
951 srcPtr
+ srcWidth
* row
* bpt
, bpt
);
952 MEMCPY(dstPtr
+ (dstWidth
* row
+ dstWidth
- 1) * bpt
,
953 srcPtr
+ (srcWidth
* row
+ srcWidth
- 1) * bpt
, bpt
);
957 /* average two src pixels each dest pixel */
958 for (row
= 0; row
< dstHeightNB
; row
+= 2) {
959 do_row(datatype
, comps
, 1,
960 srcPtr
+ (srcWidth
* (row
* 2 + 1)) * bpt
,
961 srcPtr
+ (srcWidth
* (row
* 2 + 2)) * bpt
,
962 1, dstPtr
+ (dstWidth
* row
+ 1) * bpt
);
963 do_row(datatype
, comps
, 1,
964 srcPtr
+ (srcWidth
* (row
* 2 + 1) + srcWidth
- 1) * bpt
,
965 srcPtr
+ (srcWidth
* (row
* 2 + 2) + srcWidth
- 1) * bpt
,
966 1, dstPtr
+ (dstWidth
* row
+ 1 + dstWidth
- 1) * bpt
);
974 make_3d_mipmap(GLenum datatype
, GLuint comps
, GLint border
,
975 GLint srcWidth
, GLint srcHeight
, GLint srcDepth
,
976 const GLubyte
*srcPtr
, GLint srcRowStride
,
977 GLint dstWidth
, GLint dstHeight
, GLint dstDepth
,
978 GLubyte
*dstPtr
, GLint dstRowStride
)
980 const GLint bpt
= bytes_per_pixel(datatype
, comps
);
981 const GLint srcWidthNB
= srcWidth
- 2 * border
; /* sizes w/out border */
982 const GLint srcDepthNB
= srcDepth
- 2 * border
;
983 const GLint dstWidthNB
= dstWidth
- 2 * border
;
984 const GLint dstHeightNB
= dstHeight
- 2 * border
;
985 const GLint dstDepthNB
= dstDepth
- 2 * border
;
987 GLint bytesPerSrcImage
, bytesPerDstImage
;
988 GLint bytesPerSrcRow
, bytesPerDstRow
;
989 GLint srcImageOffset
, srcRowOffset
;
991 (void) srcDepthNB
; /* silence warnings */
994 bytesPerSrcImage
= srcWidth
* srcHeight
* bpt
;
995 bytesPerDstImage
= dstWidth
* dstHeight
* bpt
;
997 bytesPerSrcRow
= srcWidth
* bpt
;
998 bytesPerDstRow
= dstWidth
* bpt
;
1000 /* Offset between adjacent src images to be averaged together */
1001 srcImageOffset
= (srcDepth
== dstDepth
) ? 0 : bytesPerSrcImage
;
1003 /* Offset between adjacent src rows to be averaged together */
1004 srcRowOffset
= (srcHeight
== dstHeight
) ? 0 : srcWidth
* bpt
;
1007 * Need to average together up to 8 src pixels for each dest pixel.
1008 * Break that down into 3 operations:
1009 * 1. take two rows from source image and average them together.
1010 * 2. take two rows from next source image and average them together.
1011 * 3. take the two averaged rows and average them for the final dst row.
1015 _mesa_printf("mip3d %d x %d x %d -> %d x %d x %d\n",
1016 srcWidth, srcHeight, srcDepth, dstWidth, dstHeight, dstDepth);
1019 for (img
= 0; img
< dstDepthNB
; img
++) {
1020 /* first source image pointer, skipping border */
1021 const GLubyte
*imgSrcA
= srcPtr
1022 + (bytesPerSrcImage
+ bytesPerSrcRow
+ border
) * bpt
* border
1023 + img
* (bytesPerSrcImage
+ srcImageOffset
);
1024 /* second source image pointer, skipping border */
1025 const GLubyte
*imgSrcB
= imgSrcA
+ srcImageOffset
;
1026 /* address of the dest image, skipping border */
1027 GLubyte
*imgDst
= dstPtr
1028 + (bytesPerDstImage
+ bytesPerDstRow
+ border
) * bpt
* border
1029 + img
* bytesPerDstImage
;
1031 /* setup the four source row pointers and the dest row pointer */
1032 const GLubyte
*srcImgARowA
= imgSrcA
;
1033 const GLubyte
*srcImgARowB
= imgSrcA
+ srcRowOffset
;
1034 const GLubyte
*srcImgBRowA
= imgSrcB
;
1035 const GLubyte
*srcImgBRowB
= imgSrcB
+ srcRowOffset
;
1036 GLubyte
*dstImgRow
= imgDst
;
1038 for (row
= 0; row
< dstHeightNB
; row
++) {
1039 do_row_3D(datatype
, comps
, srcWidthNB
,
1040 srcImgARowA
, srcImgARowB
,
1041 srcImgBRowA
, srcImgBRowB
,
1042 dstWidthNB
, dstImgRow
);
1044 /* advance to next rows */
1045 srcImgARowA
+= bytesPerSrcRow
+ srcRowOffset
;
1046 srcImgARowB
+= bytesPerSrcRow
+ srcRowOffset
;
1047 srcImgBRowA
+= bytesPerSrcRow
+ srcRowOffset
;
1048 srcImgBRowB
+= bytesPerSrcRow
+ srcRowOffset
;
1049 dstImgRow
+= bytesPerDstRow
;
1054 /* Luckily we can leverage the make_2d_mipmap() function here! */
1056 /* do front border image */
1057 make_2d_mipmap(datatype
, comps
, 1, srcWidth
, srcHeight
, srcPtr
, srcRowStride
,
1058 dstWidth
, dstHeight
, dstPtr
, dstRowStride
);
1059 /* do back border image */
1060 make_2d_mipmap(datatype
, comps
, 1, srcWidth
, srcHeight
,
1061 srcPtr
+ bytesPerSrcImage
* (srcDepth
- 1), srcRowStride
,
1062 dstWidth
, dstHeight
,
1063 dstPtr
+ bytesPerDstImage
* (dstDepth
- 1), dstRowStride
);
1064 /* do four remaining border edges that span the image slices */
1065 if (srcDepth
== dstDepth
) {
1066 /* just copy border pixels from src to dst */
1067 for (img
= 0; img
< dstDepthNB
; img
++) {
1071 /* do border along [img][row=0][col=0] */
1072 src
= srcPtr
+ (img
+ 1) * bytesPerSrcImage
;
1073 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
;
1074 MEMCPY(dst
, src
, bpt
);
1076 /* do border along [img][row=dstHeight-1][col=0] */
1077 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1078 + (srcHeight
- 1) * bytesPerSrcRow
;
1079 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1080 + (dstHeight
- 1) * bytesPerDstRow
;
1081 MEMCPY(dst
, src
, bpt
);
1083 /* do border along [img][row=0][col=dstWidth-1] */
1084 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1085 + (srcWidth
- 1) * bpt
;
1086 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1087 + (dstWidth
- 1) * bpt
;
1088 MEMCPY(dst
, src
, bpt
);
1090 /* do border along [img][row=dstHeight-1][col=dstWidth-1] */
1091 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1092 + (bytesPerSrcImage
- bpt
);
1093 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1094 + (bytesPerDstImage
- bpt
);
1095 MEMCPY(dst
, src
, bpt
);
1099 /* average border pixels from adjacent src image pairs */
1100 ASSERT(srcDepthNB
== 2 * dstDepthNB
);
1101 for (img
= 0; img
< dstDepthNB
; img
++) {
1105 /* do border along [img][row=0][col=0] */
1106 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
;
1107 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
;
1108 do_row(datatype
, comps
, 1, src
, src
+ srcImageOffset
, 1, dst
);
1110 /* do border along [img][row=dstHeight-1][col=0] */
1111 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1112 + (srcHeight
- 1) * bytesPerSrcRow
;
1113 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1114 + (dstHeight
- 1) * bytesPerDstRow
;
1115 do_row(datatype
, comps
, 1, src
, src
+ srcImageOffset
, 1, dst
);
1117 /* do border along [img][row=0][col=dstWidth-1] */
1118 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1119 + (srcWidth
- 1) * bpt
;
1120 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1121 + (dstWidth
- 1) * bpt
;
1122 do_row(datatype
, comps
, 1, src
, src
+ srcImageOffset
, 1, dst
);
1124 /* do border along [img][row=dstHeight-1][col=dstWidth-1] */
1125 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1126 + (bytesPerSrcImage
- bpt
);
1127 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1128 + (bytesPerDstImage
- bpt
);
1129 do_row(datatype
, comps
, 1, src
, src
+ srcImageOffset
, 1, dst
);
1137 make_1d_stack_mipmap(GLenum datatype
, GLuint comps
, GLint border
,
1138 GLint srcWidth
, const GLubyte
*srcPtr
, GLuint srcRowStride
,
1139 GLint dstWidth
, GLint dstHeight
,
1140 GLubyte
*dstPtr
, GLuint dstRowStride
)
1142 const GLint bpt
= bytes_per_pixel(datatype
, comps
);
1143 const GLint srcWidthNB
= srcWidth
- 2 * border
; /* sizes w/out border */
1144 const GLint dstWidthNB
= dstWidth
- 2 * border
;
1145 const GLint dstHeightNB
= dstHeight
- 2 * border
;
1146 const GLint srcRowBytes
= bpt
* srcRowStride
;
1147 const GLint dstRowBytes
= bpt
* dstRowStride
;
1152 /* Compute src and dst pointers, skipping any border */
1153 src
= srcPtr
+ border
* ((srcWidth
+ 1) * bpt
);
1154 dst
= dstPtr
+ border
* ((dstWidth
+ 1) * bpt
);
1156 for (row
= 0; row
< dstHeightNB
; row
++) {
1157 do_row(datatype
, comps
, srcWidthNB
, src
, src
,
1164 /* copy left-most pixel from source */
1165 MEMCPY(dstPtr
, srcPtr
, bpt
);
1166 /* copy right-most pixel from source */
1167 MEMCPY(dstPtr
+ (dstWidth
- 1) * bpt
,
1168 srcPtr
+ (srcWidth
- 1) * bpt
,
1176 * There is quite a bit of refactoring that could be done with this function
1177 * and \c make_2d_mipmap.
1180 make_2d_stack_mipmap(GLenum datatype
, GLuint comps
, GLint border
,
1181 GLint srcWidth
, GLint srcHeight
,
1182 const GLubyte
*srcPtr
, GLint srcRowStride
,
1183 GLint dstWidth
, GLint dstHeight
, GLint dstDepth
,
1184 GLubyte
*dstPtr
, GLint dstRowStride
)
1186 const GLint bpt
= bytes_per_pixel(datatype
, comps
);
1187 const GLint srcWidthNB
= srcWidth
- 2 * border
; /* sizes w/out border */
1188 const GLint dstWidthNB
= dstWidth
- 2 * border
;
1189 const GLint dstHeightNB
= dstHeight
- 2 * border
;
1190 const GLint dstDepthNB
= dstDepth
- 2 * border
;
1191 const GLint srcRowBytes
= bpt
* srcRowStride
;
1192 const GLint dstRowBytes
= bpt
* dstRowStride
;
1193 const GLubyte
*srcA
, *srcB
;
1198 /* Compute src and dst pointers, skipping any border */
1199 srcA
= srcPtr
+ border
* ((srcWidth
+ 1) * bpt
);
1201 srcB
= srcA
+ srcRowBytes
;
1204 dst
= dstPtr
+ border
* ((dstWidth
+ 1) * bpt
);
1206 for (layer
= 0; layer
< dstDepthNB
; layer
++) {
1207 for (row
= 0; row
< dstHeightNB
; row
++) {
1208 do_row(datatype
, comps
, srcWidthNB
, srcA
, srcB
,
1210 srcA
+= 2 * srcRowBytes
;
1211 srcB
+= 2 * srcRowBytes
;
1215 /* This is ugly but probably won't be used much */
1217 /* fill in dest border */
1218 /* lower-left border pixel */
1219 MEMCPY(dstPtr
, srcPtr
, bpt
);
1220 /* lower-right border pixel */
1221 MEMCPY(dstPtr
+ (dstWidth
- 1) * bpt
,
1222 srcPtr
+ (srcWidth
- 1) * bpt
, bpt
);
1223 /* upper-left border pixel */
1224 MEMCPY(dstPtr
+ dstWidth
* (dstHeight
- 1) * bpt
,
1225 srcPtr
+ srcWidth
* (srcHeight
- 1) * bpt
, bpt
);
1226 /* upper-right border pixel */
1227 MEMCPY(dstPtr
+ (dstWidth
* dstHeight
- 1) * bpt
,
1228 srcPtr
+ (srcWidth
* srcHeight
- 1) * bpt
, bpt
);
1230 do_row(datatype
, comps
, srcWidthNB
,
1233 dstWidthNB
, dstPtr
+ bpt
);
1235 do_row(datatype
, comps
, srcWidthNB
,
1236 srcPtr
+ (srcWidth
* (srcHeight
- 1) + 1) * bpt
,
1237 srcPtr
+ (srcWidth
* (srcHeight
- 1) + 1) * bpt
,
1239 dstPtr
+ (dstWidth
* (dstHeight
- 1) + 1) * bpt
);
1240 /* left and right borders */
1241 if (srcHeight
== dstHeight
) {
1242 /* copy border pixel from src to dst */
1243 for (row
= 1; row
< srcHeight
; row
++) {
1244 MEMCPY(dstPtr
+ dstWidth
* row
* bpt
,
1245 srcPtr
+ srcWidth
* row
* bpt
, bpt
);
1246 MEMCPY(dstPtr
+ (dstWidth
* row
+ dstWidth
- 1) * bpt
,
1247 srcPtr
+ (srcWidth
* row
+ srcWidth
- 1) * bpt
, bpt
);
1251 /* average two src pixels each dest pixel */
1252 for (row
= 0; row
< dstHeightNB
; row
+= 2) {
1253 do_row(datatype
, comps
, 1,
1254 srcPtr
+ (srcWidth
* (row
* 2 + 1)) * bpt
,
1255 srcPtr
+ (srcWidth
* (row
* 2 + 2)) * bpt
,
1256 1, dstPtr
+ (dstWidth
* row
+ 1) * bpt
);
1257 do_row(datatype
, comps
, 1,
1258 srcPtr
+ (srcWidth
* (row
* 2 + 1) + srcWidth
- 1) * bpt
,
1259 srcPtr
+ (srcWidth
* (row
* 2 + 2) + srcWidth
- 1) * bpt
,
1260 1, dstPtr
+ (dstWidth
* row
+ 1 + dstWidth
- 1) * bpt
);
1269 * Down-sample a texture image to produce the next lower mipmap level.
1272 _mesa_generate_mipmap_level(GLenum target
,
1273 GLenum datatype
, GLuint comps
,
1275 GLint srcWidth
, GLint srcHeight
, GLint srcDepth
,
1276 const GLubyte
*srcData
,
1278 GLint dstWidth
, GLint dstHeight
, GLint dstDepth
,
1283 * We use simple 2x2 averaging to compute the next mipmap level.
1287 make_1d_mipmap(datatype
, comps
, border
,
1292 case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB
:
1293 case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB
:
1294 case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB
:
1295 case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB
:
1296 case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB
:
1297 case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
:
1298 make_2d_mipmap(datatype
, comps
, border
,
1299 srcWidth
, srcHeight
, srcData
, srcRowStride
,
1300 dstWidth
, dstHeight
, dstData
, dstRowStride
);
1303 make_3d_mipmap(datatype
, comps
, border
,
1304 srcWidth
, srcHeight
, srcDepth
,
1305 srcData
, srcRowStride
,
1306 dstWidth
, dstHeight
, dstDepth
,
1307 dstData
, dstRowStride
);
1309 case GL_TEXTURE_1D_ARRAY_EXT
:
1310 make_1d_stack_mipmap(datatype
, comps
, border
,
1311 srcWidth
, srcData
, srcRowStride
,
1312 dstWidth
, dstHeight
,
1313 dstData
, dstRowStride
);
1315 case GL_TEXTURE_2D_ARRAY_EXT
:
1316 make_2d_stack_mipmap(datatype
, comps
, border
,
1317 srcWidth
, srcHeight
,
1318 srcData
, srcRowStride
,
1319 dstWidth
, dstHeight
,
1320 dstDepth
, dstData
, dstRowStride
);
1322 case GL_TEXTURE_RECTANGLE_NV
:
1323 /* no mipmaps, do nothing */
1326 _mesa_problem(NULL
, "bad dimensions in _mesa_generate_mipmaps");
1333 * compute next (level+1) image size
1334 * \return GL_FALSE if no smaller size can be generated (eg. src is 1x1x1 size)
1337 next_mipmap_level_size(GLenum target
, GLint border
,
1338 GLint srcWidth
, GLint srcHeight
, GLint srcDepth
,
1339 GLint
*dstWidth
, GLint
*dstHeight
, GLint
*dstDepth
)
1341 if (srcWidth
- 2 * border
> 1) {
1342 *dstWidth
= (srcWidth
- 2 * border
) / 2 + 2 * border
;
1345 *dstWidth
= srcWidth
; /* can't go smaller */
1348 if ((srcHeight
- 2 * border
> 1) &&
1349 (target
!= GL_TEXTURE_1D_ARRAY_EXT
)) {
1350 *dstHeight
= (srcHeight
- 2 * border
) / 2 + 2 * border
;
1353 *dstHeight
= srcHeight
; /* can't go smaller */
1356 if ((srcDepth
- 2 * border
> 1) &&
1357 (target
!= GL_TEXTURE_2D_ARRAY_EXT
)) {
1358 *dstDepth
= (srcDepth
- 2 * border
) / 2 + 2 * border
;
1361 *dstDepth
= srcDepth
; /* can't go smaller */
1364 if (*dstWidth
== srcWidth
&&
1365 *dstHeight
== srcHeight
&&
1366 *dstDepth
== srcDepth
) {
1378 * For GL_SGIX_generate_mipmap:
1379 * Generate a complete set of mipmaps from texObj's base-level image.
1380 * Stop at texObj's MaxLevel or when we get to the 1x1 texture.
1383 _mesa_generate_mipmap(GLcontext
*ctx
, GLenum target
,
1384 struct gl_texture_object
*texObj
)
1386 const struct gl_texture_image
*srcImage
;
1387 const struct gl_texture_format
*convertFormat
;
1388 const GLubyte
*srcData
= NULL
;
1389 GLubyte
*dstData
= NULL
;
1390 GLint level
, maxLevels
;
1395 /* XXX choose cube map face here??? */
1396 srcImage
= texObj
->Image
[0][texObj
->BaseLevel
];
1399 maxLevels
= _mesa_max_texture_levels(ctx
, texObj
->Target
);
1400 ASSERT(maxLevels
> 0); /* bad target */
1402 /* Find convertFormat - the format that do_row() will process */
1403 if (srcImage
->IsCompressed
) {
1404 /* setup for compressed textures */
1406 GLint components
, size
;
1409 assert(texObj
->Target
== GL_TEXTURE_2D
||
1410 texObj
->Target
== GL_TEXTURE_CUBE_MAP_ARB
);
1412 if (srcImage
->_BaseFormat
== GL_RGB
) {
1413 convertFormat
= &_mesa_texformat_rgb
;
1416 else if (srcImage
->_BaseFormat
== GL_RGBA
) {
1417 convertFormat
= &_mesa_texformat_rgba
;
1421 _mesa_problem(ctx
, "bad srcImage->_BaseFormat in _mesa_generate_mipmaps");
1425 /* allocate storage for uncompressed GL_RGB or GL_RGBA images */
1426 size
= _mesa_bytes_per_pixel(srcImage
->_BaseFormat
, CHAN_TYPE
)
1427 * srcImage
->Width
* srcImage
->Height
* srcImage
->Depth
+ 20;
1428 /* 20 extra bytes, just be safe when calling last FetchTexel */
1429 srcData
= (GLubyte
*) _mesa_malloc(size
);
1431 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "generate mipmaps");
1434 dstData
= (GLubyte
*) _mesa_malloc(size
/ 2); /* 1/4 would probably be OK */
1436 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "generate mipmaps");
1437 _mesa_free((void *) srcData
);
1441 /* decompress base image here */
1442 dst
= (GLchan
*) srcData
;
1443 for (row
= 0; row
< srcImage
->Height
; row
++) {
1445 for (col
= 0; col
< srcImage
->Width
; col
++) {
1446 srcImage
->FetchTexelc(srcImage
, col
, row
, 0, dst
);
1453 convertFormat
= srcImage
->TexFormat
;
1456 _mesa_format_to_type_and_comps(convertFormat
, &datatype
, &comps
);
1458 for (level
= texObj
->BaseLevel
; level
< texObj
->MaxLevel
1459 && level
< maxLevels
- 1; level
++) {
1460 /* generate image[level+1] from image[level] */
1461 const struct gl_texture_image
*srcImage
;
1462 struct gl_texture_image
*dstImage
;
1463 GLint srcWidth
, srcHeight
, srcDepth
;
1464 GLint dstWidth
, dstHeight
, dstDepth
;
1465 GLint border
, bytesPerTexel
;
1466 GLboolean nextLevel
;
1468 /* get src image parameters */
1469 srcImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
1471 srcWidth
= srcImage
->Width
;
1472 srcHeight
= srcImage
->Height
;
1473 srcDepth
= srcImage
->Depth
;
1474 border
= srcImage
->Border
;
1476 nextLevel
= next_mipmap_level_size(target
, border
,
1477 srcWidth
, srcHeight
, srcDepth
,
1478 &dstWidth
, &dstHeight
, &dstDepth
);
1481 if (srcImage
->IsCompressed
) {
1482 _mesa_free((void *) srcData
);
1483 _mesa_free(dstData
);
1488 /* get dest gl_texture_image */
1489 dstImage
= _mesa_get_tex_image(ctx
, texObj
, target
, level
+ 1);
1491 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "generating mipmaps");
1495 if (dstImage
->ImageOffsets
)
1496 _mesa_free(dstImage
->ImageOffsets
);
1498 /* Free old image data */
1500 ctx
->Driver
.FreeTexImageData(ctx
, dstImage
);
1502 /* initialize new image */
1503 _mesa_init_teximage_fields(ctx
, target
, dstImage
, dstWidth
, dstHeight
,
1504 dstDepth
, border
, srcImage
->InternalFormat
);
1505 dstImage
->DriverData
= NULL
;
1506 dstImage
->TexFormat
= srcImage
->TexFormat
;
1507 dstImage
->FetchTexelc
= srcImage
->FetchTexelc
;
1508 dstImage
->FetchTexelf
= srcImage
->FetchTexelf
;
1509 dstImage
->IsCompressed
= srcImage
->IsCompressed
;
1510 if (dstImage
->IsCompressed
) {
1511 dstImage
->CompressedSize
1512 = ctx
->Driver
.CompressedTextureSize(ctx
, dstImage
->Width
,
1515 dstImage
->TexFormat
->MesaFormat
);
1516 ASSERT(dstImage
->CompressedSize
> 0);
1519 ASSERT(dstImage
->TexFormat
);
1520 ASSERT(dstImage
->FetchTexelc
);
1521 ASSERT(dstImage
->FetchTexelf
);
1523 /* Alloc new teximage data buffer.
1524 * Setup src and dest data pointers.
1526 if (dstImage
->IsCompressed
) {
1527 dstImage
->Data
= _mesa_alloc_texmemory(dstImage
->CompressedSize
);
1528 if (!dstImage
->Data
) {
1529 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "generating mipmaps");
1532 /* srcData and dstData are already set */
1537 bytesPerTexel
= dstImage
->TexFormat
->TexelBytes
;
1538 ASSERT(dstWidth
* dstHeight
* dstDepth
* bytesPerTexel
> 0);
1539 dstImage
->Data
= _mesa_alloc_texmemory(dstWidth
* dstHeight
1540 * dstDepth
* bytesPerTexel
);
1541 if (!dstImage
->Data
) {
1542 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "generating mipmaps");
1545 srcData
= (const GLubyte
*) srcImage
->Data
;
1546 dstData
= (GLubyte
*) dstImage
->Data
;
1549 _mesa_generate_mipmap_level(target
, datatype
, comps
, border
,
1550 srcWidth
, srcHeight
, srcDepth
,
1551 srcData
, srcImage
->RowStride
,
1552 dstWidth
, dstHeight
, dstDepth
,
1553 dstData
, dstImage
->RowStride
);
1556 if (dstImage
->IsCompressed
) {
1558 /* compress image from dstData into dstImage->Data */
1559 const GLenum srcFormat
= convertFormat
->BaseFormat
;
1561 = _mesa_compressed_row_stride(dstImage
->TexFormat
->MesaFormat
, dstWidth
);
1562 ASSERT(srcFormat
== GL_RGB
|| srcFormat
== GL_RGBA
);
1563 dstImage
->TexFormat
->StoreImage(ctx
, 2, dstImage
->_BaseFormat
,
1564 dstImage
->TexFormat
,
1566 0, 0, 0, /* dstX/Y/Zoffset */
1567 dstRowStride
, 0, /* strides */
1568 dstWidth
, dstHeight
, 1, /* size */
1569 srcFormat
, CHAN_TYPE
,
1570 dstData
, /* src data, actually */
1571 &ctx
->DefaultPacking
);
1572 /* swap src and dest pointers */
1573 temp
= (GLubyte
*) srcData
;
1578 } /* loop over mipmap levels */
1583 * Helper function for drivers which need to rescale texture images to
1584 * certain aspect ratios.
1585 * Nearest filtering only (for broken hardware that can't support
1586 * all aspect ratios). This can be made a lot faster, but I don't
1587 * really care enough...
1590 _mesa_rescale_teximage2d(GLuint bytesPerPixel
,
1591 GLuint srcStrideInPixels
,
1592 GLuint dstRowStride
,
1593 GLint srcWidth
, GLint srcHeight
,
1594 GLint dstWidth
, GLint dstHeight
,
1595 const GLvoid
*srcImage
, GLvoid
*dstImage
)
1599 #define INNER_LOOP( TYPE, HOP, WOP ) \
1600 for ( row = 0 ; row < dstHeight ; row++ ) { \
1601 GLint srcRow = row HOP hScale; \
1602 for ( col = 0 ; col < dstWidth ; col++ ) { \
1603 GLint srcCol = col WOP wScale; \
1604 dst[col] = src[srcRow * srcStrideInPixels + srcCol]; \
1606 dst = (TYPE *) ((GLubyte *) dst + dstRowStride); \
1609 #define RESCALE_IMAGE( TYPE ) \
1611 const TYPE *src = (const TYPE *)srcImage; \
1612 TYPE *dst = (TYPE *)dstImage; \
1614 if ( srcHeight < dstHeight ) { \
1615 const GLint hScale = dstHeight / srcHeight; \
1616 if ( srcWidth < dstWidth ) { \
1617 const GLint wScale = dstWidth / srcWidth; \
1618 INNER_LOOP( TYPE, /, / ); \
1621 const GLint wScale = srcWidth / dstWidth; \
1622 INNER_LOOP( TYPE, /, * ); \
1626 const GLint hScale = srcHeight / dstHeight; \
1627 if ( srcWidth < dstWidth ) { \
1628 const GLint wScale = dstWidth / srcWidth; \
1629 INNER_LOOP( TYPE, *, / ); \
1632 const GLint wScale = srcWidth / dstWidth; \
1633 INNER_LOOP( TYPE, *, * ); \
1638 switch ( bytesPerPixel
) {
1640 RESCALE_IMAGE( GLuint
);
1644 RESCALE_IMAGE( GLushort
);
1648 RESCALE_IMAGE( GLubyte
);
1651 _mesa_problem(NULL
,"unexpected bytes/pixel in _mesa_rescale_teximage2d");
1657 * Upscale an image by replication, not (typical) stretching.
1658 * We use this when the image width or height is less than a
1659 * certain size (4, 8) and we need to upscale an image.
1662 _mesa_upscale_teximage2d(GLsizei inWidth
, GLsizei inHeight
,
1663 GLsizei outWidth
, GLsizei outHeight
,
1664 GLint comps
, const GLchan
*src
, GLint srcRowStride
,
1669 ASSERT(outWidth
>= inWidth
);
1670 ASSERT(outHeight
>= inHeight
);
1672 ASSERT(inWidth
== 1 || inWidth
== 2 || inHeight
== 1 || inHeight
== 2);
1673 ASSERT((outWidth
& 3) == 0);
1674 ASSERT((outHeight
& 3) == 0);
1677 for (i
= 0; i
< outHeight
; i
++) {
1678 const GLint ii
= i
% inHeight
;
1679 for (j
= 0; j
< outWidth
; j
++) {
1680 const GLint jj
= j
% inWidth
;
1681 for (k
= 0; k
< comps
; k
++) {
1682 dest
[(i
* outWidth
+ j
) * comps
+ k
]
1683 = src
[ii
* srcRowStride
+ jj
* comps
+ k
];