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.
33 #include "texcompress.h"
41 bytes_per_pixel(GLenum datatype
, GLuint comps
)
43 GLint b
= _mesa_sizeof_packed_type(datatype
);
46 if (_mesa_type_is_packed(datatype
))
54 * \name Support macros for do_row and do_row_3d
56 * The macro madness is here for two reasons. First, it compacts the code
57 * slightly. Second, it makes it much easier to adjust the specifics of the
58 * filter to tune the rounding characteristics.
61 #define DECLARE_ROW_POINTERS(t, e) \
62 const t(*rowA)[e] = (const t(*)[e]) srcRowA; \
63 const t(*rowB)[e] = (const t(*)[e]) srcRowB; \
64 const t(*rowC)[e] = (const t(*)[e]) srcRowC; \
65 const t(*rowD)[e] = (const t(*)[e]) srcRowD; \
66 t(*dst)[e] = (t(*)[e]) dstRow
68 #define DECLARE_ROW_POINTERS0(t) \
69 const t *rowA = (const t *) srcRowA; \
70 const t *rowB = (const t *) srcRowB; \
71 const t *rowC = (const t *) srcRowC; \
72 const t *rowD = (const t *) srcRowD; \
75 #define FILTER_SUM_3D(Aj, Ak, Bj, Bk, Cj, Ck, Dj, Dk) \
76 ((unsigned) Aj + (unsigned) Ak \
77 + (unsigned) Bj + (unsigned) Bk \
78 + (unsigned) Cj + (unsigned) Ck \
79 + (unsigned) Dj + (unsigned) Dk \
82 #define FILTER_3D(e) \
84 dst[i][e] = FILTER_SUM_3D(rowA[j][e], rowA[k][e], \
85 rowB[j][e], rowB[k][e], \
86 rowC[j][e], rowC[k][e], \
87 rowD[j][e], rowD[k][e]); \
90 #define FILTER_SUM_3D_SIGNED(Aj, Ak, Bj, Bk, Cj, Ck, Dj, Dk) \
97 #define FILTER_3D_SIGNED(e) \
99 dst[i][e] = FILTER_SUM_3D_SIGNED(rowA[j][e], rowA[k][e], \
100 rowB[j][e], rowB[k][e], \
101 rowC[j][e], rowC[k][e], \
102 rowD[j][e], rowD[k][e]); \
105 #define FILTER_F_3D(e) \
107 dst[i][e] = (rowA[j][e] + rowA[k][e] \
108 + rowB[j][e] + rowB[k][e] \
109 + rowC[j][e] + rowC[k][e] \
110 + rowD[j][e] + rowD[k][e]) * 0.125F; \
113 #define FILTER_HF_3D(e) \
115 const GLfloat aj = _mesa_half_to_float(rowA[j][e]); \
116 const GLfloat ak = _mesa_half_to_float(rowA[k][e]); \
117 const GLfloat bj = _mesa_half_to_float(rowB[j][e]); \
118 const GLfloat bk = _mesa_half_to_float(rowB[k][e]); \
119 const GLfloat cj = _mesa_half_to_float(rowC[j][e]); \
120 const GLfloat ck = _mesa_half_to_float(rowC[k][e]); \
121 const GLfloat dj = _mesa_half_to_float(rowD[j][e]); \
122 const GLfloat dk = _mesa_half_to_float(rowD[k][e]); \
123 dst[i][e] = _mesa_float_to_half((aj + ak + bj + bk + cj + ck + dj + dk) \
130 * Average together two rows of a source image to produce a single new
131 * row in the dest image. It's legal for the two source rows to point
132 * to the same data. The source width must be equal to either the
133 * dest width or two times the dest width.
134 * \param datatype GL_UNSIGNED_BYTE, GL_UNSIGNED_SHORT, GL_FLOAT, etc.
135 * \param comps number of components per pixel (1..4)
138 do_row(GLenum datatype
, GLuint comps
, GLint srcWidth
,
139 const GLvoid
*srcRowA
, const GLvoid
*srcRowB
,
140 GLint dstWidth
, GLvoid
*dstRow
)
142 const GLuint k0
= (srcWidth
== dstWidth
) ? 0 : 1;
143 const GLuint colStride
= (srcWidth
== dstWidth
) ? 1 : 2;
148 /* This assertion is no longer valid with non-power-of-2 textures
149 assert(srcWidth == dstWidth || srcWidth == 2 * dstWidth);
152 if (datatype
== GL_UNSIGNED_BYTE
&& comps
== 4) {
154 const GLubyte(*rowA
)[4] = (const GLubyte(*)[4]) srcRowA
;
155 const GLubyte(*rowB
)[4] = (const GLubyte(*)[4]) srcRowB
;
156 GLubyte(*dst
)[4] = (GLubyte(*)[4]) dstRow
;
157 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
158 i
++, j
+= colStride
, k
+= colStride
) {
159 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) / 4;
160 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) / 4;
161 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] + rowB
[j
][2] + rowB
[k
][2]) / 4;
162 dst
[i
][3] = (rowA
[j
][3] + rowA
[k
][3] + rowB
[j
][3] + rowB
[k
][3]) / 4;
165 else if (datatype
== GL_UNSIGNED_BYTE
&& comps
== 3) {
167 const GLubyte(*rowA
)[3] = (const GLubyte(*)[3]) srcRowA
;
168 const GLubyte(*rowB
)[3] = (const GLubyte(*)[3]) srcRowB
;
169 GLubyte(*dst
)[3] = (GLubyte(*)[3]) dstRow
;
170 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
171 i
++, j
+= colStride
, k
+= colStride
) {
172 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) / 4;
173 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) / 4;
174 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] + rowB
[j
][2] + rowB
[k
][2]) / 4;
177 else if (datatype
== GL_UNSIGNED_BYTE
&& comps
== 2) {
179 const GLubyte(*rowA
)[2] = (const GLubyte(*)[2]) srcRowA
;
180 const GLubyte(*rowB
)[2] = (const GLubyte(*)[2]) srcRowB
;
181 GLubyte(*dst
)[2] = (GLubyte(*)[2]) dstRow
;
182 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
183 i
++, j
+= colStride
, k
+= colStride
) {
184 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) >> 2;
185 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) >> 2;
188 else if (datatype
== GL_UNSIGNED_BYTE
&& comps
== 1) {
190 const GLubyte
*rowA
= (const GLubyte
*) srcRowA
;
191 const GLubyte
*rowB
= (const GLubyte
*) srcRowB
;
192 GLubyte
*dst
= (GLubyte
*) dstRow
;
193 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
194 i
++, j
+= colStride
, k
+= colStride
) {
195 dst
[i
] = (rowA
[j
] + rowA
[k
] + rowB
[j
] + rowB
[k
]) >> 2;
199 else if (datatype
== GL_BYTE
&& comps
== 4) {
201 const GLbyte(*rowA
)[4] = (const GLbyte(*)[4]) srcRowA
;
202 const GLbyte(*rowB
)[4] = (const GLbyte(*)[4]) srcRowB
;
203 GLbyte(*dst
)[4] = (GLbyte(*)[4]) dstRow
;
204 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
205 i
++, j
+= colStride
, k
+= colStride
) {
206 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) / 4;
207 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) / 4;
208 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] + rowB
[j
][2] + rowB
[k
][2]) / 4;
209 dst
[i
][3] = (rowA
[j
][3] + rowA
[k
][3] + rowB
[j
][3] + rowB
[k
][3]) / 4;
212 else if (datatype
== GL_BYTE
&& comps
== 3) {
214 const GLbyte(*rowA
)[3] = (const GLbyte(*)[3]) srcRowA
;
215 const GLbyte(*rowB
)[3] = (const GLbyte(*)[3]) srcRowB
;
216 GLbyte(*dst
)[3] = (GLbyte(*)[3]) dstRow
;
217 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
218 i
++, j
+= colStride
, k
+= colStride
) {
219 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) / 4;
220 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) / 4;
221 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] + rowB
[j
][2] + rowB
[k
][2]) / 4;
224 else if (datatype
== GL_BYTE
&& comps
== 2) {
226 const GLbyte(*rowA
)[2] = (const GLbyte(*)[2]) srcRowA
;
227 const GLbyte(*rowB
)[2] = (const GLbyte(*)[2]) srcRowB
;
228 GLbyte(*dst
)[2] = (GLbyte(*)[2]) dstRow
;
229 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
230 i
++, j
+= colStride
, k
+= colStride
) {
231 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) / 4;
232 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) / 4;
235 else if (datatype
== GL_BYTE
&& comps
== 1) {
237 const GLbyte
*rowA
= (const GLbyte
*) srcRowA
;
238 const GLbyte
*rowB
= (const GLbyte
*) srcRowB
;
239 GLbyte
*dst
= (GLbyte
*) dstRow
;
240 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
241 i
++, j
+= colStride
, k
+= colStride
) {
242 dst
[i
] = (rowA
[j
] + rowA
[k
] + rowB
[j
] + rowB
[k
]) / 4;
246 else if (datatype
== GL_UNSIGNED_SHORT
&& comps
== 4) {
248 const GLushort(*rowA
)[4] = (const GLushort(*)[4]) srcRowA
;
249 const GLushort(*rowB
)[4] = (const GLushort(*)[4]) srcRowB
;
250 GLushort(*dst
)[4] = (GLushort(*)[4]) dstRow
;
251 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
252 i
++, j
+= colStride
, k
+= colStride
) {
253 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) / 4;
254 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) / 4;
255 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] + rowB
[j
][2] + rowB
[k
][2]) / 4;
256 dst
[i
][3] = (rowA
[j
][3] + rowA
[k
][3] + rowB
[j
][3] + rowB
[k
][3]) / 4;
259 else if (datatype
== GL_UNSIGNED_SHORT
&& comps
== 3) {
261 const GLushort(*rowA
)[3] = (const GLushort(*)[3]) srcRowA
;
262 const GLushort(*rowB
)[3] = (const GLushort(*)[3]) srcRowB
;
263 GLushort(*dst
)[3] = (GLushort(*)[3]) dstRow
;
264 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
265 i
++, j
+= colStride
, k
+= colStride
) {
266 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) / 4;
267 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) / 4;
268 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] + rowB
[j
][2] + rowB
[k
][2]) / 4;
271 else if (datatype
== GL_UNSIGNED_SHORT
&& comps
== 2) {
273 const GLushort(*rowA
)[2] = (const GLushort(*)[2]) srcRowA
;
274 const GLushort(*rowB
)[2] = (const GLushort(*)[2]) srcRowB
;
275 GLushort(*dst
)[2] = (GLushort(*)[2]) dstRow
;
276 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
277 i
++, j
+= colStride
, k
+= colStride
) {
278 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) / 4;
279 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) / 4;
282 else if (datatype
== GL_UNSIGNED_SHORT
&& comps
== 1) {
284 const GLushort
*rowA
= (const GLushort
*) srcRowA
;
285 const GLushort
*rowB
= (const GLushort
*) srcRowB
;
286 GLushort
*dst
= (GLushort
*) dstRow
;
287 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
288 i
++, j
+= colStride
, k
+= colStride
) {
289 dst
[i
] = (rowA
[j
] + rowA
[k
] + rowB
[j
] + rowB
[k
]) / 4;
292 else if (datatype
== GL_FLOAT
&& comps
== 4) {
294 const GLfloat(*rowA
)[4] = (const GLfloat(*)[4]) srcRowA
;
295 const GLfloat(*rowB
)[4] = (const GLfloat(*)[4]) srcRowB
;
296 GLfloat(*dst
)[4] = (GLfloat(*)[4]) dstRow
;
297 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
298 i
++, j
+= colStride
, k
+= colStride
) {
299 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] +
300 rowB
[j
][0] + rowB
[k
][0]) * 0.25F
;
301 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] +
302 rowB
[j
][1] + rowB
[k
][1]) * 0.25F
;
303 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] +
304 rowB
[j
][2] + rowB
[k
][2]) * 0.25F
;
305 dst
[i
][3] = (rowA
[j
][3] + rowA
[k
][3] +
306 rowB
[j
][3] + rowB
[k
][3]) * 0.25F
;
309 else if (datatype
== GL_FLOAT
&& comps
== 3) {
311 const GLfloat(*rowA
)[3] = (const GLfloat(*)[3]) srcRowA
;
312 const GLfloat(*rowB
)[3] = (const GLfloat(*)[3]) srcRowB
;
313 GLfloat(*dst
)[3] = (GLfloat(*)[3]) dstRow
;
314 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
315 i
++, j
+= colStride
, k
+= colStride
) {
316 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] +
317 rowB
[j
][0] + rowB
[k
][0]) * 0.25F
;
318 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] +
319 rowB
[j
][1] + rowB
[k
][1]) * 0.25F
;
320 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] +
321 rowB
[j
][2] + rowB
[k
][2]) * 0.25F
;
324 else if (datatype
== GL_FLOAT
&& comps
== 2) {
326 const GLfloat(*rowA
)[2] = (const GLfloat(*)[2]) srcRowA
;
327 const GLfloat(*rowB
)[2] = (const GLfloat(*)[2]) srcRowB
;
328 GLfloat(*dst
)[2] = (GLfloat(*)[2]) dstRow
;
329 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
330 i
++, j
+= colStride
, k
+= colStride
) {
331 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] +
332 rowB
[j
][0] + rowB
[k
][0]) * 0.25F
;
333 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] +
334 rowB
[j
][1] + rowB
[k
][1]) * 0.25F
;
337 else if (datatype
== GL_FLOAT
&& comps
== 1) {
339 const GLfloat
*rowA
= (const GLfloat
*) srcRowA
;
340 const GLfloat
*rowB
= (const GLfloat
*) srcRowB
;
341 GLfloat
*dst
= (GLfloat
*) dstRow
;
342 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
343 i
++, j
+= colStride
, k
+= colStride
) {
344 dst
[i
] = (rowA
[j
] + rowA
[k
] + rowB
[j
] + rowB
[k
]) * 0.25F
;
348 else if (datatype
== GL_HALF_FLOAT_ARB
&& comps
== 4) {
349 GLuint i
, j
, k
, comp
;
350 const GLhalfARB(*rowA
)[4] = (const GLhalfARB(*)[4]) srcRowA
;
351 const GLhalfARB(*rowB
)[4] = (const GLhalfARB(*)[4]) srcRowB
;
352 GLhalfARB(*dst
)[4] = (GLhalfARB(*)[4]) dstRow
;
353 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
354 i
++, j
+= colStride
, k
+= colStride
) {
355 for (comp
= 0; comp
< 4; comp
++) {
356 GLfloat aj
, ak
, bj
, bk
;
357 aj
= _mesa_half_to_float(rowA
[j
][comp
]);
358 ak
= _mesa_half_to_float(rowA
[k
][comp
]);
359 bj
= _mesa_half_to_float(rowB
[j
][comp
]);
360 bk
= _mesa_half_to_float(rowB
[k
][comp
]);
361 dst
[i
][comp
] = _mesa_float_to_half((aj
+ ak
+ bj
+ bk
) * 0.25F
);
365 else if (datatype
== GL_HALF_FLOAT_ARB
&& comps
== 3) {
366 GLuint i
, j
, k
, comp
;
367 const GLhalfARB(*rowA
)[3] = (const GLhalfARB(*)[3]) srcRowA
;
368 const GLhalfARB(*rowB
)[3] = (const GLhalfARB(*)[3]) srcRowB
;
369 GLhalfARB(*dst
)[3] = (GLhalfARB(*)[3]) dstRow
;
370 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
371 i
++, j
+= colStride
, k
+= colStride
) {
372 for (comp
= 0; comp
< 3; comp
++) {
373 GLfloat aj
, ak
, bj
, bk
;
374 aj
= _mesa_half_to_float(rowA
[j
][comp
]);
375 ak
= _mesa_half_to_float(rowA
[k
][comp
]);
376 bj
= _mesa_half_to_float(rowB
[j
][comp
]);
377 bk
= _mesa_half_to_float(rowB
[k
][comp
]);
378 dst
[i
][comp
] = _mesa_float_to_half((aj
+ ak
+ bj
+ bk
) * 0.25F
);
382 else if (datatype
== GL_HALF_FLOAT_ARB
&& comps
== 2) {
383 GLuint i
, j
, k
, comp
;
384 const GLhalfARB(*rowA
)[2] = (const GLhalfARB(*)[2]) srcRowA
;
385 const GLhalfARB(*rowB
)[2] = (const GLhalfARB(*)[2]) srcRowB
;
386 GLhalfARB(*dst
)[2] = (GLhalfARB(*)[2]) dstRow
;
387 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
388 i
++, j
+= colStride
, k
+= colStride
) {
389 for (comp
= 0; comp
< 2; comp
++) {
390 GLfloat aj
, ak
, bj
, bk
;
391 aj
= _mesa_half_to_float(rowA
[j
][comp
]);
392 ak
= _mesa_half_to_float(rowA
[k
][comp
]);
393 bj
= _mesa_half_to_float(rowB
[j
][comp
]);
394 bk
= _mesa_half_to_float(rowB
[k
][comp
]);
395 dst
[i
][comp
] = _mesa_float_to_half((aj
+ ak
+ bj
+ bk
) * 0.25F
);
399 else if (datatype
== GL_HALF_FLOAT_ARB
&& comps
== 1) {
401 const GLhalfARB
*rowA
= (const GLhalfARB
*) srcRowA
;
402 const GLhalfARB
*rowB
= (const GLhalfARB
*) srcRowB
;
403 GLhalfARB
*dst
= (GLhalfARB
*) dstRow
;
404 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
405 i
++, j
+= colStride
, k
+= colStride
) {
406 GLfloat aj
, ak
, bj
, bk
;
407 aj
= _mesa_half_to_float(rowA
[j
]);
408 ak
= _mesa_half_to_float(rowA
[k
]);
409 bj
= _mesa_half_to_float(rowB
[j
]);
410 bk
= _mesa_half_to_float(rowB
[k
]);
411 dst
[i
] = _mesa_float_to_half((aj
+ ak
+ bj
+ bk
) * 0.25F
);
415 else if (datatype
== GL_UNSIGNED_INT
&& comps
== 1) {
417 const GLuint
*rowA
= (const GLuint
*) srcRowA
;
418 const GLuint
*rowB
= (const GLuint
*) srcRowB
;
419 GLfloat
*dst
= (GLfloat
*) dstRow
;
420 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
421 i
++, j
+= colStride
, k
+= colStride
) {
422 dst
[i
] = (GLfloat
)(rowA
[j
] / 4 + rowA
[k
] / 4 + rowB
[j
] / 4 + rowB
[k
] / 4);
426 else if (datatype
== GL_UNSIGNED_SHORT_5_6_5
&& comps
== 3) {
428 const GLushort
*rowA
= (const GLushort
*) srcRowA
;
429 const GLushort
*rowB
= (const GLushort
*) srcRowB
;
430 GLushort
*dst
= (GLushort
*) dstRow
;
431 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
432 i
++, j
+= colStride
, k
+= colStride
) {
433 const GLint rowAr0
= rowA
[j
] & 0x1f;
434 const GLint rowAr1
= rowA
[k
] & 0x1f;
435 const GLint rowBr0
= rowB
[j
] & 0x1f;
436 const GLint rowBr1
= rowB
[k
] & 0x1f;
437 const GLint rowAg0
= (rowA
[j
] >> 5) & 0x3f;
438 const GLint rowAg1
= (rowA
[k
] >> 5) & 0x3f;
439 const GLint rowBg0
= (rowB
[j
] >> 5) & 0x3f;
440 const GLint rowBg1
= (rowB
[k
] >> 5) & 0x3f;
441 const GLint rowAb0
= (rowA
[j
] >> 11) & 0x1f;
442 const GLint rowAb1
= (rowA
[k
] >> 11) & 0x1f;
443 const GLint rowBb0
= (rowB
[j
] >> 11) & 0x1f;
444 const GLint rowBb1
= (rowB
[k
] >> 11) & 0x1f;
445 const GLint red
= (rowAr0
+ rowAr1
+ rowBr0
+ rowBr1
) >> 2;
446 const GLint green
= (rowAg0
+ rowAg1
+ rowBg0
+ rowBg1
) >> 2;
447 const GLint blue
= (rowAb0
+ rowAb1
+ rowBb0
+ rowBb1
) >> 2;
448 dst
[i
] = (blue
<< 11) | (green
<< 5) | red
;
451 else if (datatype
== GL_UNSIGNED_SHORT_4_4_4_4
&& comps
== 4) {
453 const GLushort
*rowA
= (const GLushort
*) srcRowA
;
454 const GLushort
*rowB
= (const GLushort
*) srcRowB
;
455 GLushort
*dst
= (GLushort
*) dstRow
;
456 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
457 i
++, j
+= colStride
, k
+= colStride
) {
458 const GLint rowAr0
= rowA
[j
] & 0xf;
459 const GLint rowAr1
= rowA
[k
] & 0xf;
460 const GLint rowBr0
= rowB
[j
] & 0xf;
461 const GLint rowBr1
= rowB
[k
] & 0xf;
462 const GLint rowAg0
= (rowA
[j
] >> 4) & 0xf;
463 const GLint rowAg1
= (rowA
[k
] >> 4) & 0xf;
464 const GLint rowBg0
= (rowB
[j
] >> 4) & 0xf;
465 const GLint rowBg1
= (rowB
[k
] >> 4) & 0xf;
466 const GLint rowAb0
= (rowA
[j
] >> 8) & 0xf;
467 const GLint rowAb1
= (rowA
[k
] >> 8) & 0xf;
468 const GLint rowBb0
= (rowB
[j
] >> 8) & 0xf;
469 const GLint rowBb1
= (rowB
[k
] >> 8) & 0xf;
470 const GLint rowAa0
= (rowA
[j
] >> 12) & 0xf;
471 const GLint rowAa1
= (rowA
[k
] >> 12) & 0xf;
472 const GLint rowBa0
= (rowB
[j
] >> 12) & 0xf;
473 const GLint rowBa1
= (rowB
[k
] >> 12) & 0xf;
474 const GLint red
= (rowAr0
+ rowAr1
+ rowBr0
+ rowBr1
) >> 2;
475 const GLint green
= (rowAg0
+ rowAg1
+ rowBg0
+ rowBg1
) >> 2;
476 const GLint blue
= (rowAb0
+ rowAb1
+ rowBb0
+ rowBb1
) >> 2;
477 const GLint alpha
= (rowAa0
+ rowAa1
+ rowBa0
+ rowBa1
) >> 2;
478 dst
[i
] = (alpha
<< 12) | (blue
<< 8) | (green
<< 4) | red
;
481 else if (datatype
== GL_UNSIGNED_SHORT_1_5_5_5_REV
&& comps
== 4) {
483 const GLushort
*rowA
= (const GLushort
*) srcRowA
;
484 const GLushort
*rowB
= (const GLushort
*) srcRowB
;
485 GLushort
*dst
= (GLushort
*) dstRow
;
486 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
487 i
++, j
+= colStride
, k
+= colStride
) {
488 const GLint rowAr0
= rowA
[j
] & 0x1f;
489 const GLint rowAr1
= rowA
[k
] & 0x1f;
490 const GLint rowBr0
= rowB
[j
] & 0x1f;
491 const GLint rowBr1
= rowB
[k
] & 0x1f;
492 const GLint rowAg0
= (rowA
[j
] >> 5) & 0x1f;
493 const GLint rowAg1
= (rowA
[k
] >> 5) & 0x1f;
494 const GLint rowBg0
= (rowB
[j
] >> 5) & 0x1f;
495 const GLint rowBg1
= (rowB
[k
] >> 5) & 0x1f;
496 const GLint rowAb0
= (rowA
[j
] >> 10) & 0x1f;
497 const GLint rowAb1
= (rowA
[k
] >> 10) & 0x1f;
498 const GLint rowBb0
= (rowB
[j
] >> 10) & 0x1f;
499 const GLint rowBb1
= (rowB
[k
] >> 10) & 0x1f;
500 const GLint rowAa0
= (rowA
[j
] >> 15) & 0x1;
501 const GLint rowAa1
= (rowA
[k
] >> 15) & 0x1;
502 const GLint rowBa0
= (rowB
[j
] >> 15) & 0x1;
503 const GLint rowBa1
= (rowB
[k
] >> 15) & 0x1;
504 const GLint red
= (rowAr0
+ rowAr1
+ rowBr0
+ rowBr1
) >> 2;
505 const GLint green
= (rowAg0
+ rowAg1
+ rowBg0
+ rowBg1
) >> 2;
506 const GLint blue
= (rowAb0
+ rowAb1
+ rowBb0
+ rowBb1
) >> 2;
507 const GLint alpha
= (rowAa0
+ rowAa1
+ rowBa0
+ rowBa1
) >> 2;
508 dst
[i
] = (alpha
<< 15) | (blue
<< 10) | (green
<< 5) | red
;
511 else if (datatype
== GL_UNSIGNED_BYTE_3_3_2
&& comps
== 3) {
513 const GLubyte
*rowA
= (const GLubyte
*) srcRowA
;
514 const GLubyte
*rowB
= (const GLubyte
*) srcRowB
;
515 GLubyte
*dst
= (GLubyte
*) dstRow
;
516 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
517 i
++, j
+= colStride
, k
+= colStride
) {
518 const GLint rowAr0
= rowA
[j
] & 0x3;
519 const GLint rowAr1
= rowA
[k
] & 0x3;
520 const GLint rowBr0
= rowB
[j
] & 0x3;
521 const GLint rowBr1
= rowB
[k
] & 0x3;
522 const GLint rowAg0
= (rowA
[j
] >> 2) & 0x7;
523 const GLint rowAg1
= (rowA
[k
] >> 2) & 0x7;
524 const GLint rowBg0
= (rowB
[j
] >> 2) & 0x7;
525 const GLint rowBg1
= (rowB
[k
] >> 2) & 0x7;
526 const GLint rowAb0
= (rowA
[j
] >> 5) & 0x7;
527 const GLint rowAb1
= (rowA
[k
] >> 5) & 0x7;
528 const GLint rowBb0
= (rowB
[j
] >> 5) & 0x7;
529 const GLint rowBb1
= (rowB
[k
] >> 5) & 0x7;
530 const GLint red
= (rowAr0
+ rowAr1
+ rowBr0
+ rowBr1
) >> 2;
531 const GLint green
= (rowAg0
+ rowAg1
+ rowBg0
+ rowBg1
) >> 2;
532 const GLint blue
= (rowAb0
+ rowAb1
+ rowBb0
+ rowBb1
) >> 2;
533 dst
[i
] = (blue
<< 5) | (green
<< 2) | red
;
537 _mesa_problem(NULL
, "bad format in do_row()");
543 * Average together four rows of a source image to produce a single new
544 * row in the dest image. It's legal for the two source rows to point
545 * to the same data. The source width must be equal to either the
546 * dest width or two times the dest width.
548 * \param datatype GL pixel type \c GL_UNSIGNED_BYTE, \c GL_UNSIGNED_SHORT,
550 * \param comps number of components per pixel (1..4)
551 * \param srcWidth Width of a row in the source data
552 * \param srcRowA Pointer to one of the rows of source data
553 * \param srcRowB Pointer to one of the rows of source data
554 * \param srcRowC Pointer to one of the rows of source data
555 * \param srcRowD Pointer to one of the rows of source data
556 * \param dstWidth Width of a row in the destination data
557 * \param srcRowA Pointer to the row of destination data
560 do_row_3D(GLenum datatype
, GLuint comps
, GLint srcWidth
,
561 const GLvoid
*srcRowA
, const GLvoid
*srcRowB
,
562 const GLvoid
*srcRowC
, const GLvoid
*srcRowD
,
563 GLint dstWidth
, GLvoid
*dstRow
)
565 const GLuint k0
= (srcWidth
== dstWidth
) ? 0 : 1;
566 const GLuint colStride
= (srcWidth
== dstWidth
) ? 1 : 2;
572 if ((datatype
== GL_UNSIGNED_BYTE
) && (comps
== 4)) {
573 DECLARE_ROW_POINTERS(GLubyte
, 4);
575 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
576 i
++, j
+= colStride
, k
+= colStride
) {
583 else if ((datatype
== GL_UNSIGNED_BYTE
) && (comps
== 3)) {
584 DECLARE_ROW_POINTERS(GLubyte
, 3);
586 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
587 i
++, j
+= colStride
, k
+= colStride
) {
593 else if ((datatype
== GL_UNSIGNED_BYTE
) && (comps
== 2)) {
594 DECLARE_ROW_POINTERS(GLubyte
, 2);
596 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
597 i
++, j
+= colStride
, k
+= colStride
) {
602 else if ((datatype
== GL_UNSIGNED_BYTE
) && (comps
== 1)) {
603 DECLARE_ROW_POINTERS(GLubyte
, 1);
605 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
606 i
++, j
+= colStride
, k
+= colStride
) {
610 if ((datatype
== GL_BYTE
) && (comps
== 4)) {
611 DECLARE_ROW_POINTERS(GLbyte
, 4);
613 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
614 i
++, j
+= colStride
, k
+= colStride
) {
621 else if ((datatype
== GL_BYTE
) && (comps
== 3)) {
622 DECLARE_ROW_POINTERS(GLbyte
, 3);
624 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
625 i
++, j
+= colStride
, k
+= colStride
) {
631 else if ((datatype
== GL_BYTE
) && (comps
== 2)) {
632 DECLARE_ROW_POINTERS(GLbyte
, 2);
634 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
635 i
++, j
+= colStride
, k
+= colStride
) {
640 else if ((datatype
== GL_BYTE
) && (comps
== 1)) {
641 DECLARE_ROW_POINTERS(GLbyte
, 1);
643 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
644 i
++, j
+= colStride
, k
+= colStride
) {
648 else if ((datatype
== GL_UNSIGNED_SHORT
) && (comps
== 4)) {
649 DECLARE_ROW_POINTERS(GLushort
, 4);
651 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
652 i
++, j
+= colStride
, k
+= colStride
) {
659 else if ((datatype
== GL_UNSIGNED_SHORT
) && (comps
== 3)) {
660 DECLARE_ROW_POINTERS(GLushort
, 3);
662 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
663 i
++, j
+= colStride
, k
+= colStride
) {
669 else if ((datatype
== GL_UNSIGNED_SHORT
) && (comps
== 2)) {
670 DECLARE_ROW_POINTERS(GLushort
, 2);
672 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
673 i
++, j
+= colStride
, k
+= colStride
) {
678 else if ((datatype
== GL_UNSIGNED_SHORT
) && (comps
== 1)) {
679 DECLARE_ROW_POINTERS(GLushort
, 1);
681 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
682 i
++, j
+= colStride
, k
+= colStride
) {
686 else if ((datatype
== GL_FLOAT
) && (comps
== 4)) {
687 DECLARE_ROW_POINTERS(GLfloat
, 4);
689 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
690 i
++, j
+= colStride
, k
+= colStride
) {
697 else if ((datatype
== GL_FLOAT
) && (comps
== 3)) {
698 DECLARE_ROW_POINTERS(GLfloat
, 3);
700 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
701 i
++, j
+= colStride
, k
+= colStride
) {
707 else if ((datatype
== GL_FLOAT
) && (comps
== 2)) {
708 DECLARE_ROW_POINTERS(GLfloat
, 2);
710 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
711 i
++, j
+= colStride
, k
+= colStride
) {
716 else if ((datatype
== GL_FLOAT
) && (comps
== 1)) {
717 DECLARE_ROW_POINTERS(GLfloat
, 1);
719 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
720 i
++, j
+= colStride
, k
+= colStride
) {
724 else if ((datatype
== GL_HALF_FLOAT_ARB
) && (comps
== 4)) {
725 DECLARE_ROW_POINTERS(GLhalfARB
, 4);
727 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
728 i
++, j
+= colStride
, k
+= colStride
) {
735 else if ((datatype
== GL_HALF_FLOAT_ARB
) && (comps
== 3)) {
736 DECLARE_ROW_POINTERS(GLhalfARB
, 4);
738 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
739 i
++, j
+= colStride
, k
+= colStride
) {
745 else if ((datatype
== GL_HALF_FLOAT_ARB
) && (comps
== 2)) {
746 DECLARE_ROW_POINTERS(GLhalfARB
, 4);
748 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
749 i
++, j
+= colStride
, k
+= colStride
) {
754 else if ((datatype
== GL_HALF_FLOAT_ARB
) && (comps
== 1)) {
755 DECLARE_ROW_POINTERS(GLhalfARB
, 4);
757 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
758 i
++, j
+= colStride
, k
+= colStride
) {
762 else if ((datatype
== GL_UNSIGNED_INT
) && (comps
== 1)) {
763 const GLuint
*rowA
= (const GLuint
*) srcRowA
;
764 const GLuint
*rowB
= (const GLuint
*) srcRowB
;
765 const GLuint
*rowC
= (const GLuint
*) srcRowC
;
766 const GLuint
*rowD
= (const GLuint
*) srcRowD
;
767 GLfloat
*dst
= (GLfloat
*) dstRow
;
769 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
770 i
++, j
+= colStride
, k
+= colStride
) {
771 const uint64_t tmp
= (((uint64_t) rowA
[j
] + (uint64_t) rowA
[k
])
772 + ((uint64_t) rowB
[j
] + (uint64_t) rowB
[k
])
773 + ((uint64_t) rowC
[j
] + (uint64_t) rowC
[k
])
774 + ((uint64_t) rowD
[j
] + (uint64_t) rowD
[k
]));
775 dst
[i
] = (GLfloat
)((double) tmp
* 0.125);
778 else if ((datatype
== GL_UNSIGNED_SHORT_5_6_5
) && (comps
== 3)) {
779 DECLARE_ROW_POINTERS0(GLushort
);
781 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
782 i
++, j
+= colStride
, k
+= colStride
) {
783 const GLint rowAr0
= rowA
[j
] & 0x1f;
784 const GLint rowAr1
= rowA
[k
] & 0x1f;
785 const GLint rowBr0
= rowB
[j
] & 0x1f;
786 const GLint rowBr1
= rowB
[k
] & 0x1f;
787 const GLint rowCr0
= rowC
[j
] & 0x1f;
788 const GLint rowCr1
= rowC
[k
] & 0x1f;
789 const GLint rowDr0
= rowD
[j
] & 0x1f;
790 const GLint rowDr1
= rowD
[k
] & 0x1f;
791 const GLint rowAg0
= (rowA
[j
] >> 5) & 0x3f;
792 const GLint rowAg1
= (rowA
[k
] >> 5) & 0x3f;
793 const GLint rowBg0
= (rowB
[j
] >> 5) & 0x3f;
794 const GLint rowBg1
= (rowB
[k
] >> 5) & 0x3f;
795 const GLint rowCg0
= (rowC
[j
] >> 5) & 0x3f;
796 const GLint rowCg1
= (rowC
[k
] >> 5) & 0x3f;
797 const GLint rowDg0
= (rowD
[j
] >> 5) & 0x3f;
798 const GLint rowDg1
= (rowD
[k
] >> 5) & 0x3f;
799 const GLint rowAb0
= (rowA
[j
] >> 11) & 0x1f;
800 const GLint rowAb1
= (rowA
[k
] >> 11) & 0x1f;
801 const GLint rowBb0
= (rowB
[j
] >> 11) & 0x1f;
802 const GLint rowBb1
= (rowB
[k
] >> 11) & 0x1f;
803 const GLint rowCb0
= (rowC
[j
] >> 11) & 0x1f;
804 const GLint rowCb1
= (rowC
[k
] >> 11) & 0x1f;
805 const GLint rowDb0
= (rowD
[j
] >> 11) & 0x1f;
806 const GLint rowDb1
= (rowD
[k
] >> 11) & 0x1f;
807 const GLint r
= FILTER_SUM_3D(rowAr0
, rowAr1
, rowBr0
, rowBr1
,
808 rowCr0
, rowCr1
, rowDr0
, rowDr1
);
809 const GLint g
= FILTER_SUM_3D(rowAg0
, rowAg1
, rowBg0
, rowBg1
,
810 rowCg0
, rowCg1
, rowDg0
, rowDg1
);
811 const GLint b
= FILTER_SUM_3D(rowAb0
, rowAb1
, rowBb0
, rowBb1
,
812 rowCb0
, rowCb1
, rowDb0
, rowDb1
);
813 dst
[i
] = (b
<< 11) | (g
<< 5) | r
;
816 else if ((datatype
== GL_UNSIGNED_SHORT_4_4_4_4
) && (comps
== 4)) {
817 DECLARE_ROW_POINTERS0(GLushort
);
819 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
820 i
++, j
+= colStride
, k
+= colStride
) {
821 const GLint rowAr0
= rowA
[j
] & 0xf;
822 const GLint rowAr1
= rowA
[k
] & 0xf;
823 const GLint rowBr0
= rowB
[j
] & 0xf;
824 const GLint rowBr1
= rowB
[k
] & 0xf;
825 const GLint rowCr0
= rowC
[j
] & 0xf;
826 const GLint rowCr1
= rowC
[k
] & 0xf;
827 const GLint rowDr0
= rowD
[j
] & 0xf;
828 const GLint rowDr1
= rowD
[k
] & 0xf;
829 const GLint rowAg0
= (rowA
[j
] >> 4) & 0xf;
830 const GLint rowAg1
= (rowA
[k
] >> 4) & 0xf;
831 const GLint rowBg0
= (rowB
[j
] >> 4) & 0xf;
832 const GLint rowBg1
= (rowB
[k
] >> 4) & 0xf;
833 const GLint rowCg0
= (rowC
[j
] >> 4) & 0xf;
834 const GLint rowCg1
= (rowC
[k
] >> 4) & 0xf;
835 const GLint rowDg0
= (rowD
[j
] >> 4) & 0xf;
836 const GLint rowDg1
= (rowD
[k
] >> 4) & 0xf;
837 const GLint rowAb0
= (rowA
[j
] >> 8) & 0xf;
838 const GLint rowAb1
= (rowA
[k
] >> 8) & 0xf;
839 const GLint rowBb0
= (rowB
[j
] >> 8) & 0xf;
840 const GLint rowBb1
= (rowB
[k
] >> 8) & 0xf;
841 const GLint rowCb0
= (rowC
[j
] >> 8) & 0xf;
842 const GLint rowCb1
= (rowC
[k
] >> 8) & 0xf;
843 const GLint rowDb0
= (rowD
[j
] >> 8) & 0xf;
844 const GLint rowDb1
= (rowD
[k
] >> 8) & 0xf;
845 const GLint rowAa0
= (rowA
[j
] >> 12) & 0xf;
846 const GLint rowAa1
= (rowA
[k
] >> 12) & 0xf;
847 const GLint rowBa0
= (rowB
[j
] >> 12) & 0xf;
848 const GLint rowBa1
= (rowB
[k
] >> 12) & 0xf;
849 const GLint rowCa0
= (rowC
[j
] >> 12) & 0xf;
850 const GLint rowCa1
= (rowC
[k
] >> 12) & 0xf;
851 const GLint rowDa0
= (rowD
[j
] >> 12) & 0xf;
852 const GLint rowDa1
= (rowD
[k
] >> 12) & 0xf;
853 const GLint r
= FILTER_SUM_3D(rowAr0
, rowAr1
, rowBr0
, rowBr1
,
854 rowCr0
, rowCr1
, rowDr0
, rowDr1
);
855 const GLint g
= FILTER_SUM_3D(rowAg0
, rowAg1
, rowBg0
, rowBg1
,
856 rowCg0
, rowCg1
, rowDg0
, rowDg1
);
857 const GLint b
= FILTER_SUM_3D(rowAb0
, rowAb1
, rowBb0
, rowBb1
,
858 rowCb0
, rowCb1
, rowDb0
, rowDb1
);
859 const GLint a
= FILTER_SUM_3D(rowAa0
, rowAa1
, rowBa0
, rowBa1
,
860 rowCa0
, rowCa1
, rowDa0
, rowDa1
);
862 dst
[i
] = (a
<< 12) | (b
<< 8) | (g
<< 4) | r
;
865 else if ((datatype
== GL_UNSIGNED_SHORT_1_5_5_5_REV
) && (comps
== 4)) {
866 DECLARE_ROW_POINTERS0(GLushort
);
868 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
869 i
++, j
+= colStride
, k
+= colStride
) {
870 const GLint rowAr0
= rowA
[j
] & 0x1f;
871 const GLint rowAr1
= rowA
[k
] & 0x1f;
872 const GLint rowBr0
= rowB
[j
] & 0x1f;
873 const GLint rowBr1
= rowB
[k
] & 0x1f;
874 const GLint rowCr0
= rowC
[j
] & 0x1f;
875 const GLint rowCr1
= rowC
[k
] & 0x1f;
876 const GLint rowDr0
= rowD
[j
] & 0x1f;
877 const GLint rowDr1
= rowD
[k
] & 0x1f;
878 const GLint rowAg0
= (rowA
[j
] >> 5) & 0x1f;
879 const GLint rowAg1
= (rowA
[k
] >> 5) & 0x1f;
880 const GLint rowBg0
= (rowB
[j
] >> 5) & 0x1f;
881 const GLint rowBg1
= (rowB
[k
] >> 5) & 0x1f;
882 const GLint rowCg0
= (rowC
[j
] >> 5) & 0x1f;
883 const GLint rowCg1
= (rowC
[k
] >> 5) & 0x1f;
884 const GLint rowDg0
= (rowD
[j
] >> 5) & 0x1f;
885 const GLint rowDg1
= (rowD
[k
] >> 5) & 0x1f;
886 const GLint rowAb0
= (rowA
[j
] >> 10) & 0x1f;
887 const GLint rowAb1
= (rowA
[k
] >> 10) & 0x1f;
888 const GLint rowBb0
= (rowB
[j
] >> 10) & 0x1f;
889 const GLint rowBb1
= (rowB
[k
] >> 10) & 0x1f;
890 const GLint rowCb0
= (rowC
[j
] >> 10) & 0x1f;
891 const GLint rowCb1
= (rowC
[k
] >> 10) & 0x1f;
892 const GLint rowDb0
= (rowD
[j
] >> 10) & 0x1f;
893 const GLint rowDb1
= (rowD
[k
] >> 10) & 0x1f;
894 const GLint rowAa0
= (rowA
[j
] >> 15) & 0x1;
895 const GLint rowAa1
= (rowA
[k
] >> 15) & 0x1;
896 const GLint rowBa0
= (rowB
[j
] >> 15) & 0x1;
897 const GLint rowBa1
= (rowB
[k
] >> 15) & 0x1;
898 const GLint rowCa0
= (rowC
[j
] >> 15) & 0x1;
899 const GLint rowCa1
= (rowC
[k
] >> 15) & 0x1;
900 const GLint rowDa0
= (rowD
[j
] >> 15) & 0x1;
901 const GLint rowDa1
= (rowD
[k
] >> 15) & 0x1;
902 const GLint r
= FILTER_SUM_3D(rowAr0
, rowAr1
, rowBr0
, rowBr1
,
903 rowCr0
, rowCr1
, rowDr0
, rowDr1
);
904 const GLint g
= FILTER_SUM_3D(rowAg0
, rowAg1
, rowBg0
, rowBg1
,
905 rowCg0
, rowCg1
, rowDg0
, rowDg1
);
906 const GLint b
= FILTER_SUM_3D(rowAb0
, rowAb1
, rowBb0
, rowBb1
,
907 rowCb0
, rowCb1
, rowDb0
, rowDb1
);
908 const GLint a
= FILTER_SUM_3D(rowAa0
, rowAa1
, rowBa0
, rowBa1
,
909 rowCa0
, rowCa1
, rowDa0
, rowDa1
);
911 dst
[i
] = (a
<< 15) | (b
<< 10) | (g
<< 5) | r
;
914 else if ((datatype
== GL_UNSIGNED_BYTE_3_3_2
) && (comps
== 3)) {
915 DECLARE_ROW_POINTERS0(GLushort
);
917 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
918 i
++, j
+= colStride
, k
+= colStride
) {
919 const GLint rowAr0
= rowA
[j
] & 0x3;
920 const GLint rowAr1
= rowA
[k
] & 0x3;
921 const GLint rowBr0
= rowB
[j
] & 0x3;
922 const GLint rowBr1
= rowB
[k
] & 0x3;
923 const GLint rowCr0
= rowC
[j
] & 0x3;
924 const GLint rowCr1
= rowC
[k
] & 0x3;
925 const GLint rowDr0
= rowD
[j
] & 0x3;
926 const GLint rowDr1
= rowD
[k
] & 0x3;
927 const GLint rowAg0
= (rowA
[j
] >> 2) & 0x7;
928 const GLint rowAg1
= (rowA
[k
] >> 2) & 0x7;
929 const GLint rowBg0
= (rowB
[j
] >> 2) & 0x7;
930 const GLint rowBg1
= (rowB
[k
] >> 2) & 0x7;
931 const GLint rowCg0
= (rowC
[j
] >> 2) & 0x7;
932 const GLint rowCg1
= (rowC
[k
] >> 2) & 0x7;
933 const GLint rowDg0
= (rowD
[j
] >> 2) & 0x7;
934 const GLint rowDg1
= (rowD
[k
] >> 2) & 0x7;
935 const GLint rowAb0
= (rowA
[j
] >> 5) & 0x7;
936 const GLint rowAb1
= (rowA
[k
] >> 5) & 0x7;
937 const GLint rowBb0
= (rowB
[j
] >> 5) & 0x7;
938 const GLint rowBb1
= (rowB
[k
] >> 5) & 0x7;
939 const GLint rowCb0
= (rowC
[j
] >> 5) & 0x7;
940 const GLint rowCb1
= (rowC
[k
] >> 5) & 0x7;
941 const GLint rowDb0
= (rowD
[j
] >> 5) & 0x7;
942 const GLint rowDb1
= (rowD
[k
] >> 5) & 0x7;
943 const GLint r
= FILTER_SUM_3D(rowAr0
, rowAr1
, rowBr0
, rowBr1
,
944 rowCr0
, rowCr1
, rowDr0
, rowDr1
);
945 const GLint g
= FILTER_SUM_3D(rowAg0
, rowAg1
, rowBg0
, rowBg1
,
946 rowCg0
, rowCg1
, rowDg0
, rowDg1
);
947 const GLint b
= FILTER_SUM_3D(rowAb0
, rowAb1
, rowBb0
, rowBb1
,
948 rowCb0
, rowCb1
, rowDb0
, rowDb1
);
949 dst
[i
] = (b
<< 5) | (g
<< 2) | r
;
953 _mesa_problem(NULL
, "bad format in do_row()");
959 * These functions generate a 1/2-size mipmap image from a source image.
960 * Texture borders are handled by copying or averaging the source image's
961 * border texels, depending on the scale-down factor.
965 make_1d_mipmap(GLenum datatype
, GLuint comps
, GLint border
,
966 GLint srcWidth
, const GLubyte
*srcPtr
,
967 GLint dstWidth
, GLubyte
*dstPtr
)
969 const GLint bpt
= bytes_per_pixel(datatype
, comps
);
973 /* skip the border pixel, if any */
974 src
= srcPtr
+ border
* bpt
;
975 dst
= dstPtr
+ border
* bpt
;
977 /* we just duplicate the input row, kind of hack, saves code */
978 do_row(datatype
, comps
, srcWidth
- 2 * border
, src
, src
,
979 dstWidth
- 2 * border
, dst
);
982 /* copy left-most pixel from source */
983 MEMCPY(dstPtr
, srcPtr
, bpt
);
984 /* copy right-most pixel from source */
985 MEMCPY(dstPtr
+ (dstWidth
- 1) * bpt
,
986 srcPtr
+ (srcWidth
- 1) * bpt
,
993 make_2d_mipmap(GLenum datatype
, GLuint comps
, GLint border
,
994 GLint srcWidth
, GLint srcHeight
,
995 const GLubyte
*srcPtr
, GLint srcRowStride
,
996 GLint dstWidth
, GLint dstHeight
,
997 GLubyte
*dstPtr
, GLint dstRowStride
)
999 const GLint bpt
= bytes_per_pixel(datatype
, comps
);
1000 const GLint srcWidthNB
= srcWidth
- 2 * border
; /* sizes w/out border */
1001 const GLint dstWidthNB
= dstWidth
- 2 * border
;
1002 const GLint dstHeightNB
= dstHeight
- 2 * border
;
1003 const GLint srcRowBytes
= bpt
* srcRowStride
;
1004 const GLint dstRowBytes
= bpt
* dstRowStride
;
1005 const GLubyte
*srcA
, *srcB
;
1009 /* Compute src and dst pointers, skipping any border */
1010 srcA
= srcPtr
+ border
* ((srcWidth
+ 1) * bpt
);
1012 srcB
= srcA
+ srcRowBytes
;
1015 dst
= dstPtr
+ border
* ((dstWidth
+ 1) * bpt
);
1017 for (row
= 0; row
< dstHeightNB
; row
++) {
1018 do_row(datatype
, comps
, srcWidthNB
, srcA
, srcB
,
1020 srcA
+= 2 * srcRowBytes
;
1021 srcB
+= 2 * srcRowBytes
;
1025 /* This is ugly but probably won't be used much */
1027 /* fill in dest border */
1028 /* lower-left border pixel */
1029 MEMCPY(dstPtr
, srcPtr
, bpt
);
1030 /* lower-right border pixel */
1031 MEMCPY(dstPtr
+ (dstWidth
- 1) * bpt
,
1032 srcPtr
+ (srcWidth
- 1) * bpt
, bpt
);
1033 /* upper-left border pixel */
1034 MEMCPY(dstPtr
+ dstWidth
* (dstHeight
- 1) * bpt
,
1035 srcPtr
+ srcWidth
* (srcHeight
- 1) * bpt
, bpt
);
1036 /* upper-right border pixel */
1037 MEMCPY(dstPtr
+ (dstWidth
* dstHeight
- 1) * bpt
,
1038 srcPtr
+ (srcWidth
* srcHeight
- 1) * bpt
, bpt
);
1040 do_row(datatype
, comps
, srcWidthNB
,
1043 dstWidthNB
, dstPtr
+ bpt
);
1045 do_row(datatype
, comps
, srcWidthNB
,
1046 srcPtr
+ (srcWidth
* (srcHeight
- 1) + 1) * bpt
,
1047 srcPtr
+ (srcWidth
* (srcHeight
- 1) + 1) * bpt
,
1049 dstPtr
+ (dstWidth
* (dstHeight
- 1) + 1) * bpt
);
1050 /* left and right borders */
1051 if (srcHeight
== dstHeight
) {
1052 /* copy border pixel from src to dst */
1053 for (row
= 1; row
< srcHeight
; row
++) {
1054 MEMCPY(dstPtr
+ dstWidth
* row
* bpt
,
1055 srcPtr
+ srcWidth
* row
* bpt
, bpt
);
1056 MEMCPY(dstPtr
+ (dstWidth
* row
+ dstWidth
- 1) * bpt
,
1057 srcPtr
+ (srcWidth
* row
+ srcWidth
- 1) * bpt
, bpt
);
1061 /* average two src pixels each dest pixel */
1062 for (row
= 0; row
< dstHeightNB
; row
+= 2) {
1063 do_row(datatype
, comps
, 1,
1064 srcPtr
+ (srcWidth
* (row
* 2 + 1)) * bpt
,
1065 srcPtr
+ (srcWidth
* (row
* 2 + 2)) * bpt
,
1066 1, dstPtr
+ (dstWidth
* row
+ 1) * bpt
);
1067 do_row(datatype
, comps
, 1,
1068 srcPtr
+ (srcWidth
* (row
* 2 + 1) + srcWidth
- 1) * bpt
,
1069 srcPtr
+ (srcWidth
* (row
* 2 + 2) + srcWidth
- 1) * bpt
,
1070 1, dstPtr
+ (dstWidth
* row
+ 1 + dstWidth
- 1) * bpt
);
1078 make_3d_mipmap(GLenum datatype
, GLuint comps
, GLint border
,
1079 GLint srcWidth
, GLint srcHeight
, GLint srcDepth
,
1080 const GLubyte
*srcPtr
, GLint srcRowStride
,
1081 GLint dstWidth
, GLint dstHeight
, GLint dstDepth
,
1082 GLubyte
*dstPtr
, GLint dstRowStride
)
1084 const GLint bpt
= bytes_per_pixel(datatype
, comps
);
1085 const GLint srcWidthNB
= srcWidth
- 2 * border
; /* sizes w/out border */
1086 const GLint srcDepthNB
= srcDepth
- 2 * border
;
1087 const GLint dstWidthNB
= dstWidth
- 2 * border
;
1088 const GLint dstHeightNB
= dstHeight
- 2 * border
;
1089 const GLint dstDepthNB
= dstDepth
- 2 * border
;
1091 GLint bytesPerSrcImage
, bytesPerDstImage
;
1092 GLint bytesPerSrcRow
, bytesPerDstRow
;
1093 GLint srcImageOffset
, srcRowOffset
;
1095 (void) srcDepthNB
; /* silence warnings */
1098 bytesPerSrcImage
= srcWidth
* srcHeight
* bpt
;
1099 bytesPerDstImage
= dstWidth
* dstHeight
* bpt
;
1101 bytesPerSrcRow
= srcWidth
* bpt
;
1102 bytesPerDstRow
= dstWidth
* bpt
;
1104 /* Offset between adjacent src images to be averaged together */
1105 srcImageOffset
= (srcDepth
== dstDepth
) ? 0 : bytesPerSrcImage
;
1107 /* Offset between adjacent src rows to be averaged together */
1108 srcRowOffset
= (srcHeight
== dstHeight
) ? 0 : srcWidth
* bpt
;
1111 * Need to average together up to 8 src pixels for each dest pixel.
1112 * Break that down into 3 operations:
1113 * 1. take two rows from source image and average them together.
1114 * 2. take two rows from next source image and average them together.
1115 * 3. take the two averaged rows and average them for the final dst row.
1119 _mesa_printf("mip3d %d x %d x %d -> %d x %d x %d\n",
1120 srcWidth, srcHeight, srcDepth, dstWidth, dstHeight, dstDepth);
1123 for (img
= 0; img
< dstDepthNB
; img
++) {
1124 /* first source image pointer, skipping border */
1125 const GLubyte
*imgSrcA
= srcPtr
1126 + (bytesPerSrcImage
+ bytesPerSrcRow
+ border
) * bpt
* border
1127 + img
* (bytesPerSrcImage
+ srcImageOffset
);
1128 /* second source image pointer, skipping border */
1129 const GLubyte
*imgSrcB
= imgSrcA
+ srcImageOffset
;
1130 /* address of the dest image, skipping border */
1131 GLubyte
*imgDst
= dstPtr
1132 + (bytesPerDstImage
+ bytesPerDstRow
+ border
) * bpt
* border
1133 + img
* bytesPerDstImage
;
1135 /* setup the four source row pointers and the dest row pointer */
1136 const GLubyte
*srcImgARowA
= imgSrcA
;
1137 const GLubyte
*srcImgARowB
= imgSrcA
+ srcRowOffset
;
1138 const GLubyte
*srcImgBRowA
= imgSrcB
;
1139 const GLubyte
*srcImgBRowB
= imgSrcB
+ srcRowOffset
;
1140 GLubyte
*dstImgRow
= imgDst
;
1142 for (row
= 0; row
< dstHeightNB
; row
++) {
1143 do_row_3D(datatype
, comps
, srcWidthNB
,
1144 srcImgARowA
, srcImgARowB
,
1145 srcImgBRowA
, srcImgBRowB
,
1146 dstWidthNB
, dstImgRow
);
1148 /* advance to next rows */
1149 srcImgARowA
+= bytesPerSrcRow
+ srcRowOffset
;
1150 srcImgARowB
+= bytesPerSrcRow
+ srcRowOffset
;
1151 srcImgBRowA
+= bytesPerSrcRow
+ srcRowOffset
;
1152 srcImgBRowB
+= bytesPerSrcRow
+ srcRowOffset
;
1153 dstImgRow
+= bytesPerDstRow
;
1158 /* Luckily we can leverage the make_2d_mipmap() function here! */
1160 /* do front border image */
1161 make_2d_mipmap(datatype
, comps
, 1, srcWidth
, srcHeight
, srcPtr
, srcRowStride
,
1162 dstWidth
, dstHeight
, dstPtr
, dstRowStride
);
1163 /* do back border image */
1164 make_2d_mipmap(datatype
, comps
, 1, srcWidth
, srcHeight
,
1165 srcPtr
+ bytesPerSrcImage
* (srcDepth
- 1), srcRowStride
,
1166 dstWidth
, dstHeight
,
1167 dstPtr
+ bytesPerDstImage
* (dstDepth
- 1), dstRowStride
);
1168 /* do four remaining border edges that span the image slices */
1169 if (srcDepth
== dstDepth
) {
1170 /* just copy border pixels from src to dst */
1171 for (img
= 0; img
< dstDepthNB
; img
++) {
1175 /* do border along [img][row=0][col=0] */
1176 src
= srcPtr
+ (img
+ 1) * bytesPerSrcImage
;
1177 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
;
1178 MEMCPY(dst
, src
, bpt
);
1180 /* do border along [img][row=dstHeight-1][col=0] */
1181 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1182 + (srcHeight
- 1) * bytesPerSrcRow
;
1183 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1184 + (dstHeight
- 1) * bytesPerDstRow
;
1185 MEMCPY(dst
, src
, bpt
);
1187 /* do border along [img][row=0][col=dstWidth-1] */
1188 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1189 + (srcWidth
- 1) * bpt
;
1190 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1191 + (dstWidth
- 1) * bpt
;
1192 MEMCPY(dst
, src
, bpt
);
1194 /* do border along [img][row=dstHeight-1][col=dstWidth-1] */
1195 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1196 + (bytesPerSrcImage
- bpt
);
1197 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1198 + (bytesPerDstImage
- bpt
);
1199 MEMCPY(dst
, src
, bpt
);
1203 /* average border pixels from adjacent src image pairs */
1204 ASSERT(srcDepthNB
== 2 * dstDepthNB
);
1205 for (img
= 0; img
< dstDepthNB
; img
++) {
1209 /* do border along [img][row=0][col=0] */
1210 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
;
1211 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
;
1212 do_row(datatype
, comps
, 1, src
, src
+ srcImageOffset
, 1, dst
);
1214 /* do border along [img][row=dstHeight-1][col=0] */
1215 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1216 + (srcHeight
- 1) * bytesPerSrcRow
;
1217 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1218 + (dstHeight
- 1) * bytesPerDstRow
;
1219 do_row(datatype
, comps
, 1, src
, src
+ srcImageOffset
, 1, dst
);
1221 /* do border along [img][row=0][col=dstWidth-1] */
1222 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1223 + (srcWidth
- 1) * bpt
;
1224 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1225 + (dstWidth
- 1) * bpt
;
1226 do_row(datatype
, comps
, 1, src
, src
+ srcImageOffset
, 1, dst
);
1228 /* do border along [img][row=dstHeight-1][col=dstWidth-1] */
1229 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1230 + (bytesPerSrcImage
- bpt
);
1231 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1232 + (bytesPerDstImage
- bpt
);
1233 do_row(datatype
, comps
, 1, src
, src
+ srcImageOffset
, 1, dst
);
1241 make_1d_stack_mipmap(GLenum datatype
, GLuint comps
, GLint border
,
1242 GLint srcWidth
, const GLubyte
*srcPtr
, GLuint srcRowStride
,
1243 GLint dstWidth
, GLint dstHeight
,
1244 GLubyte
*dstPtr
, GLuint dstRowStride
)
1246 const GLint bpt
= bytes_per_pixel(datatype
, comps
);
1247 const GLint srcWidthNB
= srcWidth
- 2 * border
; /* sizes w/out border */
1248 const GLint dstWidthNB
= dstWidth
- 2 * border
;
1249 const GLint dstHeightNB
= dstHeight
- 2 * border
;
1250 const GLint srcRowBytes
= bpt
* srcRowStride
;
1251 const GLint dstRowBytes
= bpt
* dstRowStride
;
1256 /* Compute src and dst pointers, skipping any border */
1257 src
= srcPtr
+ border
* ((srcWidth
+ 1) * bpt
);
1258 dst
= dstPtr
+ border
* ((dstWidth
+ 1) * bpt
);
1260 for (row
= 0; row
< dstHeightNB
; row
++) {
1261 do_row(datatype
, comps
, srcWidthNB
, src
, src
,
1268 /* copy left-most pixel from source */
1269 MEMCPY(dstPtr
, srcPtr
, bpt
);
1270 /* copy right-most pixel from source */
1271 MEMCPY(dstPtr
+ (dstWidth
- 1) * bpt
,
1272 srcPtr
+ (srcWidth
- 1) * bpt
,
1280 * There is quite a bit of refactoring that could be done with this function
1281 * and \c make_2d_mipmap.
1284 make_2d_stack_mipmap(GLenum datatype
, GLuint comps
, GLint border
,
1285 GLint srcWidth
, GLint srcHeight
,
1286 const GLubyte
*srcPtr
, GLint srcRowStride
,
1287 GLint dstWidth
, GLint dstHeight
, GLint dstDepth
,
1288 GLubyte
*dstPtr
, GLint dstRowStride
)
1290 const GLint bpt
= bytes_per_pixel(datatype
, comps
);
1291 const GLint srcWidthNB
= srcWidth
- 2 * border
; /* sizes w/out border */
1292 const GLint dstWidthNB
= dstWidth
- 2 * border
;
1293 const GLint dstHeightNB
= dstHeight
- 2 * border
;
1294 const GLint dstDepthNB
= dstDepth
- 2 * border
;
1295 const GLint srcRowBytes
= bpt
* srcRowStride
;
1296 const GLint dstRowBytes
= bpt
* dstRowStride
;
1297 const GLubyte
*srcA
, *srcB
;
1302 /* Compute src and dst pointers, skipping any border */
1303 srcA
= srcPtr
+ border
* ((srcWidth
+ 1) * bpt
);
1305 srcB
= srcA
+ srcRowBytes
;
1308 dst
= dstPtr
+ border
* ((dstWidth
+ 1) * bpt
);
1310 for (layer
= 0; layer
< dstDepthNB
; layer
++) {
1311 for (row
= 0; row
< dstHeightNB
; row
++) {
1312 do_row(datatype
, comps
, srcWidthNB
, srcA
, srcB
,
1314 srcA
+= 2 * srcRowBytes
;
1315 srcB
+= 2 * srcRowBytes
;
1319 /* This is ugly but probably won't be used much */
1321 /* fill in dest border */
1322 /* lower-left border pixel */
1323 MEMCPY(dstPtr
, srcPtr
, bpt
);
1324 /* lower-right border pixel */
1325 MEMCPY(dstPtr
+ (dstWidth
- 1) * bpt
,
1326 srcPtr
+ (srcWidth
- 1) * bpt
, bpt
);
1327 /* upper-left border pixel */
1328 MEMCPY(dstPtr
+ dstWidth
* (dstHeight
- 1) * bpt
,
1329 srcPtr
+ srcWidth
* (srcHeight
- 1) * bpt
, bpt
);
1330 /* upper-right border pixel */
1331 MEMCPY(dstPtr
+ (dstWidth
* dstHeight
- 1) * bpt
,
1332 srcPtr
+ (srcWidth
* srcHeight
- 1) * bpt
, bpt
);
1334 do_row(datatype
, comps
, srcWidthNB
,
1337 dstWidthNB
, dstPtr
+ bpt
);
1339 do_row(datatype
, comps
, srcWidthNB
,
1340 srcPtr
+ (srcWidth
* (srcHeight
- 1) + 1) * bpt
,
1341 srcPtr
+ (srcWidth
* (srcHeight
- 1) + 1) * bpt
,
1343 dstPtr
+ (dstWidth
* (dstHeight
- 1) + 1) * bpt
);
1344 /* left and right borders */
1345 if (srcHeight
== dstHeight
) {
1346 /* copy border pixel from src to dst */
1347 for (row
= 1; row
< srcHeight
; row
++) {
1348 MEMCPY(dstPtr
+ dstWidth
* row
* bpt
,
1349 srcPtr
+ srcWidth
* row
* bpt
, bpt
);
1350 MEMCPY(dstPtr
+ (dstWidth
* row
+ dstWidth
- 1) * bpt
,
1351 srcPtr
+ (srcWidth
* row
+ srcWidth
- 1) * bpt
, bpt
);
1355 /* average two src pixels each dest pixel */
1356 for (row
= 0; row
< dstHeightNB
; row
+= 2) {
1357 do_row(datatype
, comps
, 1,
1358 srcPtr
+ (srcWidth
* (row
* 2 + 1)) * bpt
,
1359 srcPtr
+ (srcWidth
* (row
* 2 + 2)) * bpt
,
1360 1, dstPtr
+ (dstWidth
* row
+ 1) * bpt
);
1361 do_row(datatype
, comps
, 1,
1362 srcPtr
+ (srcWidth
* (row
* 2 + 1) + srcWidth
- 1) * bpt
,
1363 srcPtr
+ (srcWidth
* (row
* 2 + 2) + srcWidth
- 1) * bpt
,
1364 1, dstPtr
+ (dstWidth
* row
+ 1 + dstWidth
- 1) * bpt
);
1373 * Down-sample a texture image to produce the next lower mipmap level.
1374 * \param comps components per texel (1, 2, 3 or 4)
1375 * \param srcRowStride stride between source rows, in texels
1376 * \param dstRowStride stride between destination rows, in texels
1379 _mesa_generate_mipmap_level(GLenum target
,
1380 GLenum datatype
, GLuint comps
,
1382 GLint srcWidth
, GLint srcHeight
, GLint srcDepth
,
1383 const GLubyte
*srcData
,
1385 GLint dstWidth
, GLint dstHeight
, GLint dstDepth
,
1390 * We use simple 2x2 averaging to compute the next mipmap level.
1394 make_1d_mipmap(datatype
, comps
, border
,
1399 case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB
:
1400 case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB
:
1401 case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB
:
1402 case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB
:
1403 case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB
:
1404 case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
:
1405 make_2d_mipmap(datatype
, comps
, border
,
1406 srcWidth
, srcHeight
, srcData
, srcRowStride
,
1407 dstWidth
, dstHeight
, dstData
, dstRowStride
);
1410 make_3d_mipmap(datatype
, comps
, border
,
1411 srcWidth
, srcHeight
, srcDepth
,
1412 srcData
, srcRowStride
,
1413 dstWidth
, dstHeight
, dstDepth
,
1414 dstData
, dstRowStride
);
1416 case GL_TEXTURE_1D_ARRAY_EXT
:
1417 make_1d_stack_mipmap(datatype
, comps
, border
,
1418 srcWidth
, srcData
, srcRowStride
,
1419 dstWidth
, dstHeight
,
1420 dstData
, dstRowStride
);
1422 case GL_TEXTURE_2D_ARRAY_EXT
:
1423 make_2d_stack_mipmap(datatype
, comps
, border
,
1424 srcWidth
, srcHeight
,
1425 srcData
, srcRowStride
,
1426 dstWidth
, dstHeight
,
1427 dstDepth
, dstData
, dstRowStride
);
1429 case GL_TEXTURE_RECTANGLE_NV
:
1430 /* no mipmaps, do nothing */
1433 _mesa_problem(NULL
, "bad dimensions in _mesa_generate_mipmaps");
1440 * compute next (level+1) image size
1441 * \return GL_FALSE if no smaller size can be generated (eg. src is 1x1x1 size)
1444 next_mipmap_level_size(GLenum target
, GLint border
,
1445 GLint srcWidth
, GLint srcHeight
, GLint srcDepth
,
1446 GLint
*dstWidth
, GLint
*dstHeight
, GLint
*dstDepth
)
1448 if (srcWidth
- 2 * border
> 1) {
1449 *dstWidth
= (srcWidth
- 2 * border
) / 2 + 2 * border
;
1452 *dstWidth
= srcWidth
; /* can't go smaller */
1455 if ((srcHeight
- 2 * border
> 1) &&
1456 (target
!= GL_TEXTURE_1D_ARRAY_EXT
)) {
1457 *dstHeight
= (srcHeight
- 2 * border
) / 2 + 2 * border
;
1460 *dstHeight
= srcHeight
; /* can't go smaller */
1463 if ((srcDepth
- 2 * border
> 1) &&
1464 (target
!= GL_TEXTURE_2D_ARRAY_EXT
)) {
1465 *dstDepth
= (srcDepth
- 2 * border
) / 2 + 2 * border
;
1468 *dstDepth
= srcDepth
; /* can't go smaller */
1471 if (*dstWidth
== srcWidth
&&
1472 *dstHeight
== srcHeight
&&
1473 *dstDepth
== srcDepth
) {
1485 * Automatic mipmap generation.
1486 * This is the fallback/default function for ctx->Driver.GenerateMipmap().
1487 * Generate a complete set of mipmaps from texObj's BaseLevel image.
1488 * Stop at texObj's MaxLevel or when we get to the 1x1 texture.
1489 * For cube maps, target will be one of
1490 * GL_TEXTURE_CUBE_MAP_POSITIVE/NEGATIVE_X/Y/Z; never GL_TEXTURE_CUBE_MAP.
1493 _mesa_generate_mipmap(GLcontext
*ctx
, GLenum target
,
1494 struct gl_texture_object
*texObj
)
1496 const struct gl_texture_image
*srcImage
;
1497 gl_format convertFormat
;
1498 const GLubyte
*srcData
= NULL
;
1499 GLubyte
*dstData
= NULL
;
1500 GLint level
, maxLevels
;
1505 srcImage
= _mesa_select_tex_image(ctx
, texObj
, target
, texObj
->BaseLevel
);
1508 maxLevels
= _mesa_max_texture_levels(ctx
, texObj
->Target
);
1509 ASSERT(maxLevels
> 0); /* bad target */
1511 /* Find convertFormat - the format that do_row() will process */
1513 if (_mesa_is_format_compressed(srcImage
->TexFormat
)) {
1514 /* setup for compressed textures - need to allocate temporary
1515 * image buffers to hold uncompressed images.
1518 GLint components
, size
;
1521 assert(texObj
->Target
== GL_TEXTURE_2D
||
1522 texObj
->Target
== GL_TEXTURE_CUBE_MAP_ARB
);
1524 if (srcImage
->_BaseFormat
== GL_RGB
) {
1525 convertFormat
= MESA_FORMAT_RGB888
;
1528 else if (srcImage
->_BaseFormat
== GL_RGBA
) {
1529 convertFormat
= MESA_FORMAT_RGBA8888
;
1533 _mesa_problem(ctx
, "bad srcImage->_BaseFormat in _mesa_generate_mipmaps");
1537 /* allocate storage for uncompressed GL_RGB or GL_RGBA images */
1538 size
= _mesa_bytes_per_pixel(srcImage
->_BaseFormat
, CHAN_TYPE
)
1539 * srcImage
->Width
* srcImage
->Height
* srcImage
->Depth
+ 20;
1540 /* 20 extra bytes, just be safe when calling last FetchTexel */
1541 srcData
= (GLubyte
*) _mesa_malloc(size
);
1543 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "generate mipmaps");
1546 dstData
= (GLubyte
*) _mesa_malloc(size
/ 2); /* 1/4 would probably be OK */
1548 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "generate mipmaps");
1549 _mesa_free((void *) srcData
);
1553 /* decompress base image here */
1554 dst
= (GLchan
*) srcData
;
1555 for (row
= 0; row
< srcImage
->Height
; row
++) {
1557 for (col
= 0; col
< srcImage
->Width
; col
++) {
1558 srcImage
->FetchTexelc(srcImage
, col
, row
, 0, dst
);
1565 convertFormat
= srcImage
->TexFormat
;
1568 _mesa_format_to_type_and_comps(convertFormat
, &datatype
, &comps
);
1570 for (level
= texObj
->BaseLevel
; level
< texObj
->MaxLevel
1571 && level
< maxLevels
- 1; level
++) {
1572 /* generate image[level+1] from image[level] */
1573 const struct gl_texture_image
*srcImage
;
1574 struct gl_texture_image
*dstImage
;
1575 GLint srcWidth
, srcHeight
, srcDepth
;
1576 GLint dstWidth
, dstHeight
, dstDepth
;
1577 GLint border
, bytesPerTexel
;
1578 GLboolean nextLevel
;
1580 /* get src image parameters */
1581 srcImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
1583 srcWidth
= srcImage
->Width
;
1584 srcHeight
= srcImage
->Height
;
1585 srcDepth
= srcImage
->Depth
;
1586 border
= srcImage
->Border
;
1588 nextLevel
= next_mipmap_level_size(target
, border
,
1589 srcWidth
, srcHeight
, srcDepth
,
1590 &dstWidth
, &dstHeight
, &dstDepth
);
1593 if (_mesa_is_format_compressed(srcImage
->TexFormat
)) {
1594 _mesa_free((void *) srcData
);
1595 _mesa_free(dstData
);
1600 /* get dest gl_texture_image */
1601 dstImage
= _mesa_get_tex_image(ctx
, texObj
, target
, level
+ 1);
1603 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "generating mipmaps");
1607 /* Free old image data */
1609 ctx
->Driver
.FreeTexImageData(ctx
, dstImage
);
1611 /* initialize new image */
1612 _mesa_init_teximage_fields(ctx
, target
, dstImage
, dstWidth
, dstHeight
,
1613 dstDepth
, border
, srcImage
->InternalFormat
);
1614 dstImage
->DriverData
= NULL
;
1615 dstImage
->TexFormat
= srcImage
->TexFormat
;
1616 dstImage
->FetchTexelc
= srcImage
->FetchTexelc
;
1617 dstImage
->FetchTexelf
= srcImage
->FetchTexelf
;
1619 /* Alloc new teximage data buffer.
1620 * Setup src and dest data pointers.
1622 if (_mesa_is_format_compressed(dstImage
->TexFormat
)) {
1623 GLuint dstCompressedSize
=
1624 _mesa_format_image_size(dstImage
->TexFormat
, dstImage
->Width
,
1625 dstImage
->Height
, dstImage
->Depth
);
1626 ASSERT(dstCompressedSize
> 0);
1628 dstImage
->Data
= _mesa_alloc_texmemory(dstCompressedSize
);
1629 if (!dstImage
->Data
) {
1630 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "generating mipmaps");
1633 /* srcData and dstData are already set */
1638 bytesPerTexel
= _mesa_get_format_bytes(dstImage
->TexFormat
);
1639 ASSERT(dstWidth
* dstHeight
* dstDepth
* bytesPerTexel
> 0);
1640 dstImage
->Data
= _mesa_alloc_texmemory(dstWidth
* dstHeight
1641 * dstDepth
* bytesPerTexel
);
1642 if (!dstImage
->Data
) {
1643 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "generating mipmaps");
1646 srcData
= (const GLubyte
*) srcImage
->Data
;
1647 dstData
= (GLubyte
*) dstImage
->Data
;
1650 ASSERT(dstImage
->TexFormat
);
1651 ASSERT(dstImage
->FetchTexelc
);
1652 ASSERT(dstImage
->FetchTexelf
);
1654 _mesa_generate_mipmap_level(target
, datatype
, comps
, border
,
1655 srcWidth
, srcHeight
, srcDepth
,
1656 srcData
, srcImage
->RowStride
,
1657 dstWidth
, dstHeight
, dstDepth
,
1658 dstData
, dstImage
->RowStride
);
1661 if (_mesa_is_format_compressed(dstImage
->TexFormat
)) {
1663 /* compress image from dstData into dstImage->Data */
1664 const GLenum srcFormat
= _mesa_get_format_base_format(convertFormat
);
1666 = _mesa_format_row_stride(dstImage
->TexFormat
, dstWidth
);
1667 ASSERT(srcFormat
== GL_RGB
|| srcFormat
== GL_RGBA
);
1669 _mesa_texstore(ctx
, 2, dstImage
->_BaseFormat
,
1670 dstImage
->TexFormat
,
1672 0, 0, 0, /* dstX/Y/Zoffset */
1673 dstRowStride
, 0, /* strides */
1674 dstWidth
, dstHeight
, 1, /* size */
1675 srcFormat
, CHAN_TYPE
,
1676 dstData
, /* src data, actually */
1677 &ctx
->DefaultPacking
);
1679 /* swap src and dest pointers */
1680 temp
= (GLubyte
*) srcData
;
1685 } /* loop over mipmap levels */
1690 * Helper function for drivers which need to rescale texture images to
1691 * certain aspect ratios.
1692 * Nearest filtering only (for broken hardware that can't support
1693 * all aspect ratios). This can be made a lot faster, but I don't
1694 * really care enough...
1697 _mesa_rescale_teximage2d(GLuint bytesPerPixel
,
1698 GLuint srcStrideInPixels
,
1699 GLuint dstRowStride
,
1700 GLint srcWidth
, GLint srcHeight
,
1701 GLint dstWidth
, GLint dstHeight
,
1702 const GLvoid
*srcImage
, GLvoid
*dstImage
)
1706 #define INNER_LOOP( TYPE, HOP, WOP ) \
1707 for ( row = 0 ; row < dstHeight ; row++ ) { \
1708 GLint srcRow = row HOP hScale; \
1709 for ( col = 0 ; col < dstWidth ; col++ ) { \
1710 GLint srcCol = col WOP wScale; \
1711 dst[col] = src[srcRow * srcStrideInPixels + srcCol]; \
1713 dst = (TYPE *) ((GLubyte *) dst + dstRowStride); \
1716 #define RESCALE_IMAGE( TYPE ) \
1718 const TYPE *src = (const TYPE *)srcImage; \
1719 TYPE *dst = (TYPE *)dstImage; \
1721 if ( srcHeight < dstHeight ) { \
1722 const GLint hScale = dstHeight / srcHeight; \
1723 if ( srcWidth < dstWidth ) { \
1724 const GLint wScale = dstWidth / srcWidth; \
1725 INNER_LOOP( TYPE, /, / ); \
1728 const GLint wScale = srcWidth / dstWidth; \
1729 INNER_LOOP( TYPE, /, * ); \
1733 const GLint hScale = srcHeight / dstHeight; \
1734 if ( srcWidth < dstWidth ) { \
1735 const GLint wScale = dstWidth / srcWidth; \
1736 INNER_LOOP( TYPE, *, / ); \
1739 const GLint wScale = srcWidth / dstWidth; \
1740 INNER_LOOP( TYPE, *, * ); \
1745 switch ( bytesPerPixel
) {
1747 RESCALE_IMAGE( GLuint
);
1751 RESCALE_IMAGE( GLushort
);
1755 RESCALE_IMAGE( GLubyte
);
1758 _mesa_problem(NULL
,"unexpected bytes/pixel in _mesa_rescale_teximage2d");
1764 * Upscale an image by replication, not (typical) stretching.
1765 * We use this when the image width or height is less than a
1766 * certain size (4, 8) and we need to upscale an image.
1769 _mesa_upscale_teximage2d(GLsizei inWidth
, GLsizei inHeight
,
1770 GLsizei outWidth
, GLsizei outHeight
,
1771 GLint comps
, const GLchan
*src
, GLint srcRowStride
,
1776 ASSERT(outWidth
>= inWidth
);
1777 ASSERT(outHeight
>= inHeight
);
1779 ASSERT(inWidth
== 1 || inWidth
== 2 || inHeight
== 1 || inHeight
== 2);
1780 ASSERT((outWidth
& 3) == 0);
1781 ASSERT((outHeight
& 3) == 0);
1784 for (i
= 0; i
< outHeight
; i
++) {
1785 const GLint ii
= i
% inHeight
;
1786 for (j
= 0; j
< outWidth
; j
++) {
1787 const GLint jj
= j
% inWidth
;
1788 for (k
= 0; k
< comps
; k
++) {
1789 dest
[(i
* outWidth
+ j
) * comps
+ k
]
1790 = src
[ii
* srcRowStride
+ jj
* comps
+ k
];