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.
40 bytes_per_pixel(GLenum datatype
, GLuint comps
)
42 GLint b
= _mesa_sizeof_packed_type(datatype
);
45 if (_mesa_type_is_packed(datatype
))
53 * \name Support macros for do_row and do_row_3d
55 * The macro madness is here for two reasons. First, it compacts the code
56 * slightly. Second, it makes it much easier to adjust the specifics of the
57 * filter to tune the rounding characteristics.
60 #define DECLARE_ROW_POINTERS(t, e) \
61 const t(*rowA)[e] = (const t(*)[e]) srcRowA; \
62 const t(*rowB)[e] = (const t(*)[e]) srcRowB; \
63 const t(*rowC)[e] = (const t(*)[e]) srcRowC; \
64 const t(*rowD)[e] = (const t(*)[e]) srcRowD; \
65 t(*dst)[e] = (t(*)[e]) dstRow
67 #define DECLARE_ROW_POINTERS0(t) \
68 const t *rowA = (const t *) srcRowA; \
69 const t *rowB = (const t *) srcRowB; \
70 const t *rowC = (const t *) srcRowC; \
71 const t *rowD = (const t *) srcRowD; \
74 #define FILTER_SUM_3D(Aj, Ak, Bj, Bk, Cj, Ck, Dj, Dk) \
75 ((unsigned) Aj + (unsigned) Ak \
76 + (unsigned) Bj + (unsigned) Bk \
77 + (unsigned) Cj + (unsigned) Ck \
78 + (unsigned) Dj + (unsigned) Dk \
81 #define FILTER_3D(e) \
83 dst[i][e] = FILTER_SUM_3D(rowA[j][e], rowA[k][e], \
84 rowB[j][e], rowB[k][e], \
85 rowC[j][e], rowC[k][e], \
86 rowD[j][e], rowD[k][e]); \
89 #define FILTER_SUM_3D_SIGNED(Aj, Ak, Bj, Bk, Cj, Ck, Dj, Dk) \
96 #define FILTER_3D_SIGNED(e) \
98 dst[i][e] = FILTER_SUM_3D_SIGNED(rowA[j][e], rowA[k][e], \
99 rowB[j][e], rowB[k][e], \
100 rowC[j][e], rowC[k][e], \
101 rowD[j][e], rowD[k][e]); \
104 #define FILTER_F_3D(e) \
106 dst[i][e] = (rowA[j][e] + rowA[k][e] \
107 + rowB[j][e] + rowB[k][e] \
108 + rowC[j][e] + rowC[k][e] \
109 + rowD[j][e] + rowD[k][e]) * 0.125F; \
112 #define FILTER_HF_3D(e) \
114 const GLfloat aj = _mesa_half_to_float(rowA[j][e]); \
115 const GLfloat ak = _mesa_half_to_float(rowA[k][e]); \
116 const GLfloat bj = _mesa_half_to_float(rowB[j][e]); \
117 const GLfloat bk = _mesa_half_to_float(rowB[k][e]); \
118 const GLfloat cj = _mesa_half_to_float(rowC[j][e]); \
119 const GLfloat ck = _mesa_half_to_float(rowC[k][e]); \
120 const GLfloat dj = _mesa_half_to_float(rowD[j][e]); \
121 const GLfloat dk = _mesa_half_to_float(rowD[k][e]); \
122 dst[i][e] = _mesa_float_to_half((aj + ak + bj + bk + cj + ck + dj + dk) \
129 * Average together two rows of a source image to produce a single new
130 * row in the dest image. It's legal for the two source rows to point
131 * to the same data. The source width must be equal to either the
132 * dest width or two times the dest width.
133 * \param datatype GL_UNSIGNED_BYTE, GL_UNSIGNED_SHORT, GL_FLOAT, etc.
134 * \param comps number of components per pixel (1..4)
137 do_row(GLenum datatype
, GLuint comps
, GLint srcWidth
,
138 const GLvoid
*srcRowA
, const GLvoid
*srcRowB
,
139 GLint dstWidth
, GLvoid
*dstRow
)
141 const GLuint k0
= (srcWidth
== dstWidth
) ? 0 : 1;
142 const GLuint colStride
= (srcWidth
== dstWidth
) ? 1 : 2;
147 /* This assertion is no longer valid with non-power-of-2 textures
148 assert(srcWidth == dstWidth || srcWidth == 2 * dstWidth);
151 if (datatype
== GL_UNSIGNED_BYTE
&& comps
== 4) {
153 const GLubyte(*rowA
)[4] = (const GLubyte(*)[4]) srcRowA
;
154 const GLubyte(*rowB
)[4] = (const GLubyte(*)[4]) srcRowB
;
155 GLubyte(*dst
)[4] = (GLubyte(*)[4]) dstRow
;
156 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
157 i
++, j
+= colStride
, k
+= colStride
) {
158 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) / 4;
159 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) / 4;
160 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] + rowB
[j
][2] + rowB
[k
][2]) / 4;
161 dst
[i
][3] = (rowA
[j
][3] + rowA
[k
][3] + rowB
[j
][3] + rowB
[k
][3]) / 4;
164 else if (datatype
== GL_UNSIGNED_BYTE
&& comps
== 3) {
166 const GLubyte(*rowA
)[3] = (const GLubyte(*)[3]) srcRowA
;
167 const GLubyte(*rowB
)[3] = (const GLubyte(*)[3]) srcRowB
;
168 GLubyte(*dst
)[3] = (GLubyte(*)[3]) dstRow
;
169 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
170 i
++, j
+= colStride
, k
+= colStride
) {
171 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) / 4;
172 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) / 4;
173 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] + rowB
[j
][2] + rowB
[k
][2]) / 4;
176 else if (datatype
== GL_UNSIGNED_BYTE
&& comps
== 2) {
178 const GLubyte(*rowA
)[2] = (const GLubyte(*)[2]) srcRowA
;
179 const GLubyte(*rowB
)[2] = (const GLubyte(*)[2]) srcRowB
;
180 GLubyte(*dst
)[2] = (GLubyte(*)[2]) dstRow
;
181 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
182 i
++, j
+= colStride
, k
+= colStride
) {
183 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) >> 2;
184 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) >> 2;
187 else if (datatype
== GL_UNSIGNED_BYTE
&& comps
== 1) {
189 const GLubyte
*rowA
= (const GLubyte
*) srcRowA
;
190 const GLubyte
*rowB
= (const GLubyte
*) srcRowB
;
191 GLubyte
*dst
= (GLubyte
*) dstRow
;
192 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
193 i
++, j
+= colStride
, k
+= colStride
) {
194 dst
[i
] = (rowA
[j
] + rowA
[k
] + rowB
[j
] + rowB
[k
]) >> 2;
198 else if (datatype
== GL_BYTE
&& comps
== 4) {
200 const GLbyte(*rowA
)[4] = (const GLbyte(*)[4]) srcRowA
;
201 const GLbyte(*rowB
)[4] = (const GLbyte(*)[4]) srcRowB
;
202 GLbyte(*dst
)[4] = (GLbyte(*)[4]) dstRow
;
203 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
204 i
++, j
+= colStride
, k
+= colStride
) {
205 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) / 4;
206 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) / 4;
207 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] + rowB
[j
][2] + rowB
[k
][2]) / 4;
208 dst
[i
][3] = (rowA
[j
][3] + rowA
[k
][3] + rowB
[j
][3] + rowB
[k
][3]) / 4;
211 else if (datatype
== GL_BYTE
&& comps
== 3) {
213 const GLbyte(*rowA
)[3] = (const GLbyte(*)[3]) srcRowA
;
214 const GLbyte(*rowB
)[3] = (const GLbyte(*)[3]) srcRowB
;
215 GLbyte(*dst
)[3] = (GLbyte(*)[3]) dstRow
;
216 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
217 i
++, j
+= colStride
, k
+= colStride
) {
218 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) / 4;
219 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) / 4;
220 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] + rowB
[j
][2] + rowB
[k
][2]) / 4;
223 else if (datatype
== GL_BYTE
&& comps
== 2) {
225 const GLbyte(*rowA
)[2] = (const GLbyte(*)[2]) srcRowA
;
226 const GLbyte(*rowB
)[2] = (const GLbyte(*)[2]) srcRowB
;
227 GLbyte(*dst
)[2] = (GLbyte(*)[2]) dstRow
;
228 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
229 i
++, j
+= colStride
, k
+= colStride
) {
230 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) / 4;
231 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) / 4;
234 else if (datatype
== GL_BYTE
&& comps
== 1) {
236 const GLbyte
*rowA
= (const GLbyte
*) srcRowA
;
237 const GLbyte
*rowB
= (const GLbyte
*) srcRowB
;
238 GLbyte
*dst
= (GLbyte
*) dstRow
;
239 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
240 i
++, j
+= colStride
, k
+= colStride
) {
241 dst
[i
] = (rowA
[j
] + rowA
[k
] + rowB
[j
] + rowB
[k
]) / 4;
245 else if (datatype
== GL_UNSIGNED_SHORT
&& comps
== 4) {
247 const GLushort(*rowA
)[4] = (const GLushort(*)[4]) srcRowA
;
248 const GLushort(*rowB
)[4] = (const GLushort(*)[4]) srcRowB
;
249 GLushort(*dst
)[4] = (GLushort(*)[4]) dstRow
;
250 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
251 i
++, j
+= colStride
, k
+= colStride
) {
252 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) / 4;
253 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) / 4;
254 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] + rowB
[j
][2] + rowB
[k
][2]) / 4;
255 dst
[i
][3] = (rowA
[j
][3] + rowA
[k
][3] + rowB
[j
][3] + rowB
[k
][3]) / 4;
258 else if (datatype
== GL_UNSIGNED_SHORT
&& comps
== 3) {
260 const GLushort(*rowA
)[3] = (const GLushort(*)[3]) srcRowA
;
261 const GLushort(*rowB
)[3] = (const GLushort(*)[3]) srcRowB
;
262 GLushort(*dst
)[3] = (GLushort(*)[3]) 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] + rowB
[j
][0] + rowB
[k
][0]) / 4;
266 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) / 4;
267 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] + rowB
[j
][2] + rowB
[k
][2]) / 4;
270 else if (datatype
== GL_UNSIGNED_SHORT
&& comps
== 2) {
272 const GLushort(*rowA
)[2] = (const GLushort(*)[2]) srcRowA
;
273 const GLushort(*rowB
)[2] = (const GLushort(*)[2]) srcRowB
;
274 GLushort(*dst
)[2] = (GLushort(*)[2]) dstRow
;
275 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
276 i
++, j
+= colStride
, k
+= colStride
) {
277 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] + rowB
[j
][0] + rowB
[k
][0]) / 4;
278 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] + rowB
[j
][1] + rowB
[k
][1]) / 4;
281 else if (datatype
== GL_UNSIGNED_SHORT
&& comps
== 1) {
283 const GLushort
*rowA
= (const GLushort
*) srcRowA
;
284 const GLushort
*rowB
= (const GLushort
*) srcRowB
;
285 GLushort
*dst
= (GLushort
*) dstRow
;
286 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
287 i
++, j
+= colStride
, k
+= colStride
) {
288 dst
[i
] = (rowA
[j
] + rowA
[k
] + rowB
[j
] + rowB
[k
]) / 4;
291 else if (datatype
== GL_FLOAT
&& comps
== 4) {
293 const GLfloat(*rowA
)[4] = (const GLfloat(*)[4]) srcRowA
;
294 const GLfloat(*rowB
)[4] = (const GLfloat(*)[4]) srcRowB
;
295 GLfloat(*dst
)[4] = (GLfloat(*)[4]) dstRow
;
296 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
297 i
++, j
+= colStride
, k
+= colStride
) {
298 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] +
299 rowB
[j
][0] + rowB
[k
][0]) * 0.25F
;
300 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] +
301 rowB
[j
][1] + rowB
[k
][1]) * 0.25F
;
302 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] +
303 rowB
[j
][2] + rowB
[k
][2]) * 0.25F
;
304 dst
[i
][3] = (rowA
[j
][3] + rowA
[k
][3] +
305 rowB
[j
][3] + rowB
[k
][3]) * 0.25F
;
308 else if (datatype
== GL_FLOAT
&& comps
== 3) {
310 const GLfloat(*rowA
)[3] = (const GLfloat(*)[3]) srcRowA
;
311 const GLfloat(*rowB
)[3] = (const GLfloat(*)[3]) srcRowB
;
312 GLfloat(*dst
)[3] = (GLfloat(*)[3]) dstRow
;
313 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
314 i
++, j
+= colStride
, k
+= colStride
) {
315 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] +
316 rowB
[j
][0] + rowB
[k
][0]) * 0.25F
;
317 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] +
318 rowB
[j
][1] + rowB
[k
][1]) * 0.25F
;
319 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] +
320 rowB
[j
][2] + rowB
[k
][2]) * 0.25F
;
323 else if (datatype
== GL_FLOAT
&& comps
== 2) {
325 const GLfloat(*rowA
)[2] = (const GLfloat(*)[2]) srcRowA
;
326 const GLfloat(*rowB
)[2] = (const GLfloat(*)[2]) srcRowB
;
327 GLfloat(*dst
)[2] = (GLfloat(*)[2]) dstRow
;
328 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
329 i
++, j
+= colStride
, k
+= colStride
) {
330 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] +
331 rowB
[j
][0] + rowB
[k
][0]) * 0.25F
;
332 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] +
333 rowB
[j
][1] + rowB
[k
][1]) * 0.25F
;
336 else if (datatype
== GL_FLOAT
&& comps
== 1) {
338 const GLfloat
*rowA
= (const GLfloat
*) srcRowA
;
339 const GLfloat
*rowB
= (const GLfloat
*) srcRowB
;
340 GLfloat
*dst
= (GLfloat
*) dstRow
;
341 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
342 i
++, j
+= colStride
, k
+= colStride
) {
343 dst
[i
] = (rowA
[j
] + rowA
[k
] + rowB
[j
] + rowB
[k
]) * 0.25F
;
347 else if (datatype
== GL_HALF_FLOAT_ARB
&& comps
== 4) {
348 GLuint i
, j
, k
, comp
;
349 const GLhalfARB(*rowA
)[4] = (const GLhalfARB(*)[4]) srcRowA
;
350 const GLhalfARB(*rowB
)[4] = (const GLhalfARB(*)[4]) srcRowB
;
351 GLhalfARB(*dst
)[4] = (GLhalfARB(*)[4]) dstRow
;
352 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
353 i
++, j
+= colStride
, k
+= colStride
) {
354 for (comp
= 0; comp
< 4; comp
++) {
355 GLfloat aj
, ak
, bj
, bk
;
356 aj
= _mesa_half_to_float(rowA
[j
][comp
]);
357 ak
= _mesa_half_to_float(rowA
[k
][comp
]);
358 bj
= _mesa_half_to_float(rowB
[j
][comp
]);
359 bk
= _mesa_half_to_float(rowB
[k
][comp
]);
360 dst
[i
][comp
] = _mesa_float_to_half((aj
+ ak
+ bj
+ bk
) * 0.25F
);
364 else if (datatype
== GL_HALF_FLOAT_ARB
&& comps
== 3) {
365 GLuint i
, j
, k
, comp
;
366 const GLhalfARB(*rowA
)[3] = (const GLhalfARB(*)[3]) srcRowA
;
367 const GLhalfARB(*rowB
)[3] = (const GLhalfARB(*)[3]) srcRowB
;
368 GLhalfARB(*dst
)[3] = (GLhalfARB(*)[3]) dstRow
;
369 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
370 i
++, j
+= colStride
, k
+= colStride
) {
371 for (comp
= 0; comp
< 3; comp
++) {
372 GLfloat aj
, ak
, bj
, bk
;
373 aj
= _mesa_half_to_float(rowA
[j
][comp
]);
374 ak
= _mesa_half_to_float(rowA
[k
][comp
]);
375 bj
= _mesa_half_to_float(rowB
[j
][comp
]);
376 bk
= _mesa_half_to_float(rowB
[k
][comp
]);
377 dst
[i
][comp
] = _mesa_float_to_half((aj
+ ak
+ bj
+ bk
) * 0.25F
);
381 else if (datatype
== GL_HALF_FLOAT_ARB
&& comps
== 2) {
382 GLuint i
, j
, k
, comp
;
383 const GLhalfARB(*rowA
)[2] = (const GLhalfARB(*)[2]) srcRowA
;
384 const GLhalfARB(*rowB
)[2] = (const GLhalfARB(*)[2]) srcRowB
;
385 GLhalfARB(*dst
)[2] = (GLhalfARB(*)[2]) dstRow
;
386 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
387 i
++, j
+= colStride
, k
+= colStride
) {
388 for (comp
= 0; comp
< 2; comp
++) {
389 GLfloat aj
, ak
, bj
, bk
;
390 aj
= _mesa_half_to_float(rowA
[j
][comp
]);
391 ak
= _mesa_half_to_float(rowA
[k
][comp
]);
392 bj
= _mesa_half_to_float(rowB
[j
][comp
]);
393 bk
= _mesa_half_to_float(rowB
[k
][comp
]);
394 dst
[i
][comp
] = _mesa_float_to_half((aj
+ ak
+ bj
+ bk
) * 0.25F
);
398 else if (datatype
== GL_HALF_FLOAT_ARB
&& comps
== 1) {
400 const GLhalfARB
*rowA
= (const GLhalfARB
*) srcRowA
;
401 const GLhalfARB
*rowB
= (const GLhalfARB
*) srcRowB
;
402 GLhalfARB
*dst
= (GLhalfARB
*) dstRow
;
403 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
404 i
++, j
+= colStride
, k
+= colStride
) {
405 GLfloat aj
, ak
, bj
, bk
;
406 aj
= _mesa_half_to_float(rowA
[j
]);
407 ak
= _mesa_half_to_float(rowA
[k
]);
408 bj
= _mesa_half_to_float(rowB
[j
]);
409 bk
= _mesa_half_to_float(rowB
[k
]);
410 dst
[i
] = _mesa_float_to_half((aj
+ ak
+ bj
+ bk
) * 0.25F
);
414 else if (datatype
== GL_UNSIGNED_INT
&& comps
== 1) {
416 const GLuint
*rowA
= (const GLuint
*) srcRowA
;
417 const GLuint
*rowB
= (const GLuint
*) srcRowB
;
418 GLuint
*dst
= (GLuint
*) dstRow
;
419 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
420 i
++, j
+= colStride
, k
+= colStride
) {
421 dst
[i
] = (GLfloat
)(rowA
[j
] / 4 + rowA
[k
] / 4 + rowB
[j
] / 4 + rowB
[k
] / 4);
425 else if (datatype
== GL_UNSIGNED_SHORT_5_6_5
&& comps
== 3) {
427 const GLushort
*rowA
= (const GLushort
*) srcRowA
;
428 const GLushort
*rowB
= (const GLushort
*) srcRowB
;
429 GLushort
*dst
= (GLushort
*) dstRow
;
430 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
431 i
++, j
+= colStride
, k
+= colStride
) {
432 const GLint rowAr0
= rowA
[j
] & 0x1f;
433 const GLint rowAr1
= rowA
[k
] & 0x1f;
434 const GLint rowBr0
= rowB
[j
] & 0x1f;
435 const GLint rowBr1
= rowB
[k
] & 0x1f;
436 const GLint rowAg0
= (rowA
[j
] >> 5) & 0x3f;
437 const GLint rowAg1
= (rowA
[k
] >> 5) & 0x3f;
438 const GLint rowBg0
= (rowB
[j
] >> 5) & 0x3f;
439 const GLint rowBg1
= (rowB
[k
] >> 5) & 0x3f;
440 const GLint rowAb0
= (rowA
[j
] >> 11) & 0x1f;
441 const GLint rowAb1
= (rowA
[k
] >> 11) & 0x1f;
442 const GLint rowBb0
= (rowB
[j
] >> 11) & 0x1f;
443 const GLint rowBb1
= (rowB
[k
] >> 11) & 0x1f;
444 const GLint red
= (rowAr0
+ rowAr1
+ rowBr0
+ rowBr1
) >> 2;
445 const GLint green
= (rowAg0
+ rowAg1
+ rowBg0
+ rowBg1
) >> 2;
446 const GLint blue
= (rowAb0
+ rowAb1
+ rowBb0
+ rowBb1
) >> 2;
447 dst
[i
] = (blue
<< 11) | (green
<< 5) | red
;
450 else if (datatype
== GL_UNSIGNED_SHORT_4_4_4_4
&& comps
== 4) {
452 const GLushort
*rowA
= (const GLushort
*) srcRowA
;
453 const GLushort
*rowB
= (const GLushort
*) srcRowB
;
454 GLushort
*dst
= (GLushort
*) dstRow
;
455 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
456 i
++, j
+= colStride
, k
+= colStride
) {
457 const GLint rowAr0
= rowA
[j
] & 0xf;
458 const GLint rowAr1
= rowA
[k
] & 0xf;
459 const GLint rowBr0
= rowB
[j
] & 0xf;
460 const GLint rowBr1
= rowB
[k
] & 0xf;
461 const GLint rowAg0
= (rowA
[j
] >> 4) & 0xf;
462 const GLint rowAg1
= (rowA
[k
] >> 4) & 0xf;
463 const GLint rowBg0
= (rowB
[j
] >> 4) & 0xf;
464 const GLint rowBg1
= (rowB
[k
] >> 4) & 0xf;
465 const GLint rowAb0
= (rowA
[j
] >> 8) & 0xf;
466 const GLint rowAb1
= (rowA
[k
] >> 8) & 0xf;
467 const GLint rowBb0
= (rowB
[j
] >> 8) & 0xf;
468 const GLint rowBb1
= (rowB
[k
] >> 8) & 0xf;
469 const GLint rowAa0
= (rowA
[j
] >> 12) & 0xf;
470 const GLint rowAa1
= (rowA
[k
] >> 12) & 0xf;
471 const GLint rowBa0
= (rowB
[j
] >> 12) & 0xf;
472 const GLint rowBa1
= (rowB
[k
] >> 12) & 0xf;
473 const GLint red
= (rowAr0
+ rowAr1
+ rowBr0
+ rowBr1
) >> 2;
474 const GLint green
= (rowAg0
+ rowAg1
+ rowBg0
+ rowBg1
) >> 2;
475 const GLint blue
= (rowAb0
+ rowAb1
+ rowBb0
+ rowBb1
) >> 2;
476 const GLint alpha
= (rowAa0
+ rowAa1
+ rowBa0
+ rowBa1
) >> 2;
477 dst
[i
] = (alpha
<< 12) | (blue
<< 8) | (green
<< 4) | red
;
480 else if (datatype
== GL_UNSIGNED_SHORT_1_5_5_5_REV
&& comps
== 4) {
482 const GLushort
*rowA
= (const GLushort
*) srcRowA
;
483 const GLushort
*rowB
= (const GLushort
*) srcRowB
;
484 GLushort
*dst
= (GLushort
*) dstRow
;
485 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
486 i
++, j
+= colStride
, k
+= colStride
) {
487 const GLint rowAr0
= rowA
[j
] & 0x1f;
488 const GLint rowAr1
= rowA
[k
] & 0x1f;
489 const GLint rowBr0
= rowB
[j
] & 0x1f;
490 const GLint rowBr1
= rowB
[k
] & 0x1f;
491 const GLint rowAg0
= (rowA
[j
] >> 5) & 0x1f;
492 const GLint rowAg1
= (rowA
[k
] >> 5) & 0x1f;
493 const GLint rowBg0
= (rowB
[j
] >> 5) & 0x1f;
494 const GLint rowBg1
= (rowB
[k
] >> 5) & 0x1f;
495 const GLint rowAb0
= (rowA
[j
] >> 10) & 0x1f;
496 const GLint rowAb1
= (rowA
[k
] >> 10) & 0x1f;
497 const GLint rowBb0
= (rowB
[j
] >> 10) & 0x1f;
498 const GLint rowBb1
= (rowB
[k
] >> 10) & 0x1f;
499 const GLint rowAa0
= (rowA
[j
] >> 15) & 0x1;
500 const GLint rowAa1
= (rowA
[k
] >> 15) & 0x1;
501 const GLint rowBa0
= (rowB
[j
] >> 15) & 0x1;
502 const GLint rowBa1
= (rowB
[k
] >> 15) & 0x1;
503 const GLint red
= (rowAr0
+ rowAr1
+ rowBr0
+ rowBr1
) >> 2;
504 const GLint green
= (rowAg0
+ rowAg1
+ rowBg0
+ rowBg1
) >> 2;
505 const GLint blue
= (rowAb0
+ rowAb1
+ rowBb0
+ rowBb1
) >> 2;
506 const GLint alpha
= (rowAa0
+ rowAa1
+ rowBa0
+ rowBa1
) >> 2;
507 dst
[i
] = (alpha
<< 15) | (blue
<< 10) | (green
<< 5) | red
;
510 else if (datatype
== GL_UNSIGNED_BYTE_3_3_2
&& comps
== 3) {
512 const GLubyte
*rowA
= (const GLubyte
*) srcRowA
;
513 const GLubyte
*rowB
= (const GLubyte
*) srcRowB
;
514 GLubyte
*dst
= (GLubyte
*) dstRow
;
515 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
516 i
++, j
+= colStride
, k
+= colStride
) {
517 const GLint rowAr0
= rowA
[j
] & 0x3;
518 const GLint rowAr1
= rowA
[k
] & 0x3;
519 const GLint rowBr0
= rowB
[j
] & 0x3;
520 const GLint rowBr1
= rowB
[k
] & 0x3;
521 const GLint rowAg0
= (rowA
[j
] >> 2) & 0x7;
522 const GLint rowAg1
= (rowA
[k
] >> 2) & 0x7;
523 const GLint rowBg0
= (rowB
[j
] >> 2) & 0x7;
524 const GLint rowBg1
= (rowB
[k
] >> 2) & 0x7;
525 const GLint rowAb0
= (rowA
[j
] >> 5) & 0x7;
526 const GLint rowAb1
= (rowA
[k
] >> 5) & 0x7;
527 const GLint rowBb0
= (rowB
[j
] >> 5) & 0x7;
528 const GLint rowBb1
= (rowB
[k
] >> 5) & 0x7;
529 const GLint red
= (rowAr0
+ rowAr1
+ rowBr0
+ rowBr1
) >> 2;
530 const GLint green
= (rowAg0
+ rowAg1
+ rowBg0
+ rowBg1
) >> 2;
531 const GLint blue
= (rowAb0
+ rowAb1
+ rowBb0
+ rowBb1
) >> 2;
532 dst
[i
] = (blue
<< 5) | (green
<< 2) | red
;
536 _mesa_problem(NULL
, "bad format in do_row()");
542 * Average together four rows of a source image to produce a single new
543 * row in the dest image. It's legal for the two source rows to point
544 * to the same data. The source width must be equal to either the
545 * dest width or two times the dest width.
547 * \param datatype GL pixel type \c GL_UNSIGNED_BYTE, \c GL_UNSIGNED_SHORT,
549 * \param comps number of components per pixel (1..4)
550 * \param srcWidth Width of a row in the source data
551 * \param srcRowA Pointer to one of the rows of source data
552 * \param srcRowB Pointer to one of the rows of source data
553 * \param srcRowC Pointer to one of the rows of source data
554 * \param srcRowD Pointer to one of the rows of source data
555 * \param dstWidth Width of a row in the destination data
556 * \param srcRowA Pointer to the row of destination data
559 do_row_3D(GLenum datatype
, GLuint comps
, GLint srcWidth
,
560 const GLvoid
*srcRowA
, const GLvoid
*srcRowB
,
561 const GLvoid
*srcRowC
, const GLvoid
*srcRowD
,
562 GLint dstWidth
, GLvoid
*dstRow
)
564 const GLuint k0
= (srcWidth
== dstWidth
) ? 0 : 1;
565 const GLuint colStride
= (srcWidth
== dstWidth
) ? 1 : 2;
571 if ((datatype
== GL_UNSIGNED_BYTE
) && (comps
== 4)) {
572 DECLARE_ROW_POINTERS(GLubyte
, 4);
574 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
575 i
++, j
+= colStride
, k
+= colStride
) {
582 else if ((datatype
== GL_UNSIGNED_BYTE
) && (comps
== 3)) {
583 DECLARE_ROW_POINTERS(GLubyte
, 3);
585 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
586 i
++, j
+= colStride
, k
+= colStride
) {
592 else if ((datatype
== GL_UNSIGNED_BYTE
) && (comps
== 2)) {
593 DECLARE_ROW_POINTERS(GLubyte
, 2);
595 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
596 i
++, j
+= colStride
, k
+= colStride
) {
601 else if ((datatype
== GL_UNSIGNED_BYTE
) && (comps
== 1)) {
602 DECLARE_ROW_POINTERS(GLubyte
, 1);
604 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
605 i
++, j
+= colStride
, k
+= colStride
) {
609 else if ((datatype
== GL_BYTE
) && (comps
== 4)) {
610 DECLARE_ROW_POINTERS(GLbyte
, 4);
612 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
613 i
++, j
+= colStride
, k
+= colStride
) {
620 else if ((datatype
== GL_BYTE
) && (comps
== 3)) {
621 DECLARE_ROW_POINTERS(GLbyte
, 3);
623 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
624 i
++, j
+= colStride
, k
+= colStride
) {
630 else if ((datatype
== GL_BYTE
) && (comps
== 2)) {
631 DECLARE_ROW_POINTERS(GLbyte
, 2);
633 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
634 i
++, j
+= colStride
, k
+= colStride
) {
639 else if ((datatype
== GL_BYTE
) && (comps
== 1)) {
640 DECLARE_ROW_POINTERS(GLbyte
, 1);
642 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
643 i
++, j
+= colStride
, k
+= colStride
) {
647 else if ((datatype
== GL_UNSIGNED_SHORT
) && (comps
== 4)) {
648 DECLARE_ROW_POINTERS(GLushort
, 4);
650 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
651 i
++, j
+= colStride
, k
+= colStride
) {
658 else if ((datatype
== GL_UNSIGNED_SHORT
) && (comps
== 3)) {
659 DECLARE_ROW_POINTERS(GLushort
, 3);
661 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
662 i
++, j
+= colStride
, k
+= colStride
) {
668 else if ((datatype
== GL_UNSIGNED_SHORT
) && (comps
== 2)) {
669 DECLARE_ROW_POINTERS(GLushort
, 2);
671 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
672 i
++, j
+= colStride
, k
+= colStride
) {
677 else if ((datatype
== GL_UNSIGNED_SHORT
) && (comps
== 1)) {
678 DECLARE_ROW_POINTERS(GLushort
, 1);
680 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
681 i
++, j
+= colStride
, k
+= colStride
) {
685 else if ((datatype
== GL_FLOAT
) && (comps
== 4)) {
686 DECLARE_ROW_POINTERS(GLfloat
, 4);
688 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
689 i
++, j
+= colStride
, k
+= colStride
) {
696 else if ((datatype
== GL_FLOAT
) && (comps
== 3)) {
697 DECLARE_ROW_POINTERS(GLfloat
, 3);
699 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
700 i
++, j
+= colStride
, k
+= colStride
) {
706 else if ((datatype
== GL_FLOAT
) && (comps
== 2)) {
707 DECLARE_ROW_POINTERS(GLfloat
, 2);
709 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
710 i
++, j
+= colStride
, k
+= colStride
) {
715 else if ((datatype
== GL_FLOAT
) && (comps
== 1)) {
716 DECLARE_ROW_POINTERS(GLfloat
, 1);
718 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
719 i
++, j
+= colStride
, k
+= colStride
) {
723 else if ((datatype
== GL_HALF_FLOAT_ARB
) && (comps
== 4)) {
724 DECLARE_ROW_POINTERS(GLhalfARB
, 4);
726 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
727 i
++, j
+= colStride
, k
+= colStride
) {
734 else if ((datatype
== GL_HALF_FLOAT_ARB
) && (comps
== 3)) {
735 DECLARE_ROW_POINTERS(GLhalfARB
, 4);
737 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
738 i
++, j
+= colStride
, k
+= colStride
) {
744 else if ((datatype
== GL_HALF_FLOAT_ARB
) && (comps
== 2)) {
745 DECLARE_ROW_POINTERS(GLhalfARB
, 4);
747 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
748 i
++, j
+= colStride
, k
+= colStride
) {
753 else if ((datatype
== GL_HALF_FLOAT_ARB
) && (comps
== 1)) {
754 DECLARE_ROW_POINTERS(GLhalfARB
, 4);
756 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
757 i
++, j
+= colStride
, k
+= colStride
) {
761 else if ((datatype
== GL_UNSIGNED_INT
) && (comps
== 1)) {
762 const GLuint
*rowA
= (const GLuint
*) srcRowA
;
763 const GLuint
*rowB
= (const GLuint
*) srcRowB
;
764 const GLuint
*rowC
= (const GLuint
*) srcRowC
;
765 const GLuint
*rowD
= (const GLuint
*) srcRowD
;
766 GLfloat
*dst
= (GLfloat
*) dstRow
;
768 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
769 i
++, j
+= colStride
, k
+= colStride
) {
770 const uint64_t tmp
= (((uint64_t) rowA
[j
] + (uint64_t) rowA
[k
])
771 + ((uint64_t) rowB
[j
] + (uint64_t) rowB
[k
])
772 + ((uint64_t) rowC
[j
] + (uint64_t) rowC
[k
])
773 + ((uint64_t) rowD
[j
] + (uint64_t) rowD
[k
]));
774 dst
[i
] = (GLfloat
)((double) tmp
* 0.125);
777 else if ((datatype
== GL_UNSIGNED_SHORT_5_6_5
) && (comps
== 3)) {
778 DECLARE_ROW_POINTERS0(GLushort
);
780 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
781 i
++, j
+= colStride
, k
+= colStride
) {
782 const GLint rowAr0
= rowA
[j
] & 0x1f;
783 const GLint rowAr1
= rowA
[k
] & 0x1f;
784 const GLint rowBr0
= rowB
[j
] & 0x1f;
785 const GLint rowBr1
= rowB
[k
] & 0x1f;
786 const GLint rowCr0
= rowC
[j
] & 0x1f;
787 const GLint rowCr1
= rowC
[k
] & 0x1f;
788 const GLint rowDr0
= rowD
[j
] & 0x1f;
789 const GLint rowDr1
= rowD
[k
] & 0x1f;
790 const GLint rowAg0
= (rowA
[j
] >> 5) & 0x3f;
791 const GLint rowAg1
= (rowA
[k
] >> 5) & 0x3f;
792 const GLint rowBg0
= (rowB
[j
] >> 5) & 0x3f;
793 const GLint rowBg1
= (rowB
[k
] >> 5) & 0x3f;
794 const GLint rowCg0
= (rowC
[j
] >> 5) & 0x3f;
795 const GLint rowCg1
= (rowC
[k
] >> 5) & 0x3f;
796 const GLint rowDg0
= (rowD
[j
] >> 5) & 0x3f;
797 const GLint rowDg1
= (rowD
[k
] >> 5) & 0x3f;
798 const GLint rowAb0
= (rowA
[j
] >> 11) & 0x1f;
799 const GLint rowAb1
= (rowA
[k
] >> 11) & 0x1f;
800 const GLint rowBb0
= (rowB
[j
] >> 11) & 0x1f;
801 const GLint rowBb1
= (rowB
[k
] >> 11) & 0x1f;
802 const GLint rowCb0
= (rowC
[j
] >> 11) & 0x1f;
803 const GLint rowCb1
= (rowC
[k
] >> 11) & 0x1f;
804 const GLint rowDb0
= (rowD
[j
] >> 11) & 0x1f;
805 const GLint rowDb1
= (rowD
[k
] >> 11) & 0x1f;
806 const GLint r
= FILTER_SUM_3D(rowAr0
, rowAr1
, rowBr0
, rowBr1
,
807 rowCr0
, rowCr1
, rowDr0
, rowDr1
);
808 const GLint g
= FILTER_SUM_3D(rowAg0
, rowAg1
, rowBg0
, rowBg1
,
809 rowCg0
, rowCg1
, rowDg0
, rowDg1
);
810 const GLint b
= FILTER_SUM_3D(rowAb0
, rowAb1
, rowBb0
, rowBb1
,
811 rowCb0
, rowCb1
, rowDb0
, rowDb1
);
812 dst
[i
] = (b
<< 11) | (g
<< 5) | r
;
815 else if ((datatype
== GL_UNSIGNED_SHORT_4_4_4_4
) && (comps
== 4)) {
816 DECLARE_ROW_POINTERS0(GLushort
);
818 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
819 i
++, j
+= colStride
, k
+= colStride
) {
820 const GLint rowAr0
= rowA
[j
] & 0xf;
821 const GLint rowAr1
= rowA
[k
] & 0xf;
822 const GLint rowBr0
= rowB
[j
] & 0xf;
823 const GLint rowBr1
= rowB
[k
] & 0xf;
824 const GLint rowCr0
= rowC
[j
] & 0xf;
825 const GLint rowCr1
= rowC
[k
] & 0xf;
826 const GLint rowDr0
= rowD
[j
] & 0xf;
827 const GLint rowDr1
= rowD
[k
] & 0xf;
828 const GLint rowAg0
= (rowA
[j
] >> 4) & 0xf;
829 const GLint rowAg1
= (rowA
[k
] >> 4) & 0xf;
830 const GLint rowBg0
= (rowB
[j
] >> 4) & 0xf;
831 const GLint rowBg1
= (rowB
[k
] >> 4) & 0xf;
832 const GLint rowCg0
= (rowC
[j
] >> 4) & 0xf;
833 const GLint rowCg1
= (rowC
[k
] >> 4) & 0xf;
834 const GLint rowDg0
= (rowD
[j
] >> 4) & 0xf;
835 const GLint rowDg1
= (rowD
[k
] >> 4) & 0xf;
836 const GLint rowAb0
= (rowA
[j
] >> 8) & 0xf;
837 const GLint rowAb1
= (rowA
[k
] >> 8) & 0xf;
838 const GLint rowBb0
= (rowB
[j
] >> 8) & 0xf;
839 const GLint rowBb1
= (rowB
[k
] >> 8) & 0xf;
840 const GLint rowCb0
= (rowC
[j
] >> 8) & 0xf;
841 const GLint rowCb1
= (rowC
[k
] >> 8) & 0xf;
842 const GLint rowDb0
= (rowD
[j
] >> 8) & 0xf;
843 const GLint rowDb1
= (rowD
[k
] >> 8) & 0xf;
844 const GLint rowAa0
= (rowA
[j
] >> 12) & 0xf;
845 const GLint rowAa1
= (rowA
[k
] >> 12) & 0xf;
846 const GLint rowBa0
= (rowB
[j
] >> 12) & 0xf;
847 const GLint rowBa1
= (rowB
[k
] >> 12) & 0xf;
848 const GLint rowCa0
= (rowC
[j
] >> 12) & 0xf;
849 const GLint rowCa1
= (rowC
[k
] >> 12) & 0xf;
850 const GLint rowDa0
= (rowD
[j
] >> 12) & 0xf;
851 const GLint rowDa1
= (rowD
[k
] >> 12) & 0xf;
852 const GLint r
= FILTER_SUM_3D(rowAr0
, rowAr1
, rowBr0
, rowBr1
,
853 rowCr0
, rowCr1
, rowDr0
, rowDr1
);
854 const GLint g
= FILTER_SUM_3D(rowAg0
, rowAg1
, rowBg0
, rowBg1
,
855 rowCg0
, rowCg1
, rowDg0
, rowDg1
);
856 const GLint b
= FILTER_SUM_3D(rowAb0
, rowAb1
, rowBb0
, rowBb1
,
857 rowCb0
, rowCb1
, rowDb0
, rowDb1
);
858 const GLint a
= FILTER_SUM_3D(rowAa0
, rowAa1
, rowBa0
, rowBa1
,
859 rowCa0
, rowCa1
, rowDa0
, rowDa1
);
861 dst
[i
] = (a
<< 12) | (b
<< 8) | (g
<< 4) | r
;
864 else if ((datatype
== GL_UNSIGNED_SHORT_1_5_5_5_REV
) && (comps
== 4)) {
865 DECLARE_ROW_POINTERS0(GLushort
);
867 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
868 i
++, j
+= colStride
, k
+= colStride
) {
869 const GLint rowAr0
= rowA
[j
] & 0x1f;
870 const GLint rowAr1
= rowA
[k
] & 0x1f;
871 const GLint rowBr0
= rowB
[j
] & 0x1f;
872 const GLint rowBr1
= rowB
[k
] & 0x1f;
873 const GLint rowCr0
= rowC
[j
] & 0x1f;
874 const GLint rowCr1
= rowC
[k
] & 0x1f;
875 const GLint rowDr0
= rowD
[j
] & 0x1f;
876 const GLint rowDr1
= rowD
[k
] & 0x1f;
877 const GLint rowAg0
= (rowA
[j
] >> 5) & 0x1f;
878 const GLint rowAg1
= (rowA
[k
] >> 5) & 0x1f;
879 const GLint rowBg0
= (rowB
[j
] >> 5) & 0x1f;
880 const GLint rowBg1
= (rowB
[k
] >> 5) & 0x1f;
881 const GLint rowCg0
= (rowC
[j
] >> 5) & 0x1f;
882 const GLint rowCg1
= (rowC
[k
] >> 5) & 0x1f;
883 const GLint rowDg0
= (rowD
[j
] >> 5) & 0x1f;
884 const GLint rowDg1
= (rowD
[k
] >> 5) & 0x1f;
885 const GLint rowAb0
= (rowA
[j
] >> 10) & 0x1f;
886 const GLint rowAb1
= (rowA
[k
] >> 10) & 0x1f;
887 const GLint rowBb0
= (rowB
[j
] >> 10) & 0x1f;
888 const GLint rowBb1
= (rowB
[k
] >> 10) & 0x1f;
889 const GLint rowCb0
= (rowC
[j
] >> 10) & 0x1f;
890 const GLint rowCb1
= (rowC
[k
] >> 10) & 0x1f;
891 const GLint rowDb0
= (rowD
[j
] >> 10) & 0x1f;
892 const GLint rowDb1
= (rowD
[k
] >> 10) & 0x1f;
893 const GLint rowAa0
= (rowA
[j
] >> 15) & 0x1;
894 const GLint rowAa1
= (rowA
[k
] >> 15) & 0x1;
895 const GLint rowBa0
= (rowB
[j
] >> 15) & 0x1;
896 const GLint rowBa1
= (rowB
[k
] >> 15) & 0x1;
897 const GLint rowCa0
= (rowC
[j
] >> 15) & 0x1;
898 const GLint rowCa1
= (rowC
[k
] >> 15) & 0x1;
899 const GLint rowDa0
= (rowD
[j
] >> 15) & 0x1;
900 const GLint rowDa1
= (rowD
[k
] >> 15) & 0x1;
901 const GLint r
= FILTER_SUM_3D(rowAr0
, rowAr1
, rowBr0
, rowBr1
,
902 rowCr0
, rowCr1
, rowDr0
, rowDr1
);
903 const GLint g
= FILTER_SUM_3D(rowAg0
, rowAg1
, rowBg0
, rowBg1
,
904 rowCg0
, rowCg1
, rowDg0
, rowDg1
);
905 const GLint b
= FILTER_SUM_3D(rowAb0
, rowAb1
, rowBb0
, rowBb1
,
906 rowCb0
, rowCb1
, rowDb0
, rowDb1
);
907 const GLint a
= FILTER_SUM_3D(rowAa0
, rowAa1
, rowBa0
, rowBa1
,
908 rowCa0
, rowCa1
, rowDa0
, rowDa1
);
910 dst
[i
] = (a
<< 15) | (b
<< 10) | (g
<< 5) | r
;
913 else if ((datatype
== GL_UNSIGNED_BYTE_3_3_2
) && (comps
== 3)) {
914 DECLARE_ROW_POINTERS0(GLushort
);
916 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
917 i
++, j
+= colStride
, k
+= colStride
) {
918 const GLint rowAr0
= rowA
[j
] & 0x3;
919 const GLint rowAr1
= rowA
[k
] & 0x3;
920 const GLint rowBr0
= rowB
[j
] & 0x3;
921 const GLint rowBr1
= rowB
[k
] & 0x3;
922 const GLint rowCr0
= rowC
[j
] & 0x3;
923 const GLint rowCr1
= rowC
[k
] & 0x3;
924 const GLint rowDr0
= rowD
[j
] & 0x3;
925 const GLint rowDr1
= rowD
[k
] & 0x3;
926 const GLint rowAg0
= (rowA
[j
] >> 2) & 0x7;
927 const GLint rowAg1
= (rowA
[k
] >> 2) & 0x7;
928 const GLint rowBg0
= (rowB
[j
] >> 2) & 0x7;
929 const GLint rowBg1
= (rowB
[k
] >> 2) & 0x7;
930 const GLint rowCg0
= (rowC
[j
] >> 2) & 0x7;
931 const GLint rowCg1
= (rowC
[k
] >> 2) & 0x7;
932 const GLint rowDg0
= (rowD
[j
] >> 2) & 0x7;
933 const GLint rowDg1
= (rowD
[k
] >> 2) & 0x7;
934 const GLint rowAb0
= (rowA
[j
] >> 5) & 0x7;
935 const GLint rowAb1
= (rowA
[k
] >> 5) & 0x7;
936 const GLint rowBb0
= (rowB
[j
] >> 5) & 0x7;
937 const GLint rowBb1
= (rowB
[k
] >> 5) & 0x7;
938 const GLint rowCb0
= (rowC
[j
] >> 5) & 0x7;
939 const GLint rowCb1
= (rowC
[k
] >> 5) & 0x7;
940 const GLint rowDb0
= (rowD
[j
] >> 5) & 0x7;
941 const GLint rowDb1
= (rowD
[k
] >> 5) & 0x7;
942 const GLint r
= FILTER_SUM_3D(rowAr0
, rowAr1
, rowBr0
, rowBr1
,
943 rowCr0
, rowCr1
, rowDr0
, rowDr1
);
944 const GLint g
= FILTER_SUM_3D(rowAg0
, rowAg1
, rowBg0
, rowBg1
,
945 rowCg0
, rowCg1
, rowDg0
, rowDg1
);
946 const GLint b
= FILTER_SUM_3D(rowAb0
, rowAb1
, rowBb0
, rowBb1
,
947 rowCb0
, rowCb1
, rowDb0
, rowDb1
);
948 dst
[i
] = (b
<< 5) | (g
<< 2) | r
;
952 _mesa_problem(NULL
, "bad format in do_row()");
958 * These functions generate a 1/2-size mipmap image from a source image.
959 * Texture borders are handled by copying or averaging the source image's
960 * border texels, depending on the scale-down factor.
964 make_1d_mipmap(GLenum datatype
, GLuint comps
, GLint border
,
965 GLint srcWidth
, const GLubyte
*srcPtr
,
966 GLint dstWidth
, GLubyte
*dstPtr
)
968 const GLint bpt
= bytes_per_pixel(datatype
, comps
);
972 /* skip the border pixel, if any */
973 src
= srcPtr
+ border
* bpt
;
974 dst
= dstPtr
+ border
* bpt
;
976 /* we just duplicate the input row, kind of hack, saves code */
977 do_row(datatype
, comps
, srcWidth
- 2 * border
, src
, src
,
978 dstWidth
- 2 * border
, dst
);
981 /* copy left-most pixel from source */
984 memcpy(dstPtr
, srcPtr
, bpt
);
985 /* copy right-most pixel from source */
986 memcpy(dstPtr
+ (dstWidth
- 1) * bpt
,
987 srcPtr
+ (srcWidth
- 1) * bpt
,
994 make_2d_mipmap(GLenum datatype
, GLuint comps
, GLint border
,
995 GLint srcWidth
, GLint srcHeight
,
996 const GLubyte
*srcPtr
, GLint srcRowStride
,
997 GLint dstWidth
, GLint dstHeight
,
998 GLubyte
*dstPtr
, GLint dstRowStride
)
1000 const GLint bpt
= bytes_per_pixel(datatype
, comps
);
1001 const GLint srcWidthNB
= srcWidth
- 2 * border
; /* sizes w/out border */
1002 const GLint dstWidthNB
= dstWidth
- 2 * border
;
1003 const GLint dstHeightNB
= dstHeight
- 2 * border
;
1004 const GLint srcRowBytes
= bpt
* srcRowStride
;
1005 const GLint dstRowBytes
= bpt
* dstRowStride
;
1006 const GLubyte
*srcA
, *srcB
;
1008 GLint row
, srcRowStep
;
1010 /* Compute src and dst pointers, skipping any border */
1011 srcA
= srcPtr
+ border
* ((srcWidth
+ 1) * bpt
);
1012 if (srcHeight
> 1 && srcHeight
> dstHeight
) {
1013 /* sample from two source rows */
1014 srcB
= srcA
+ srcRowBytes
;
1018 /* sample from one source row */
1023 dst
= dstPtr
+ border
* ((dstWidth
+ 1) * bpt
);
1025 for (row
= 0; row
< dstHeightNB
; row
++) {
1026 do_row(datatype
, comps
, srcWidthNB
, srcA
, srcB
,
1028 srcA
+= srcRowStep
* srcRowBytes
;
1029 srcB
+= srcRowStep
* srcRowBytes
;
1033 /* This is ugly but probably won't be used much */
1035 /* fill in dest border */
1036 /* lower-left border pixel */
1039 memcpy(dstPtr
, srcPtr
, bpt
);
1040 /* lower-right border pixel */
1041 memcpy(dstPtr
+ (dstWidth
- 1) * bpt
,
1042 srcPtr
+ (srcWidth
- 1) * bpt
, bpt
);
1043 /* upper-left border pixel */
1044 memcpy(dstPtr
+ dstWidth
* (dstHeight
- 1) * bpt
,
1045 srcPtr
+ srcWidth
* (srcHeight
- 1) * bpt
, bpt
);
1046 /* upper-right border pixel */
1047 memcpy(dstPtr
+ (dstWidth
* dstHeight
- 1) * bpt
,
1048 srcPtr
+ (srcWidth
* srcHeight
- 1) * bpt
, bpt
);
1050 do_row(datatype
, comps
, srcWidthNB
,
1053 dstWidthNB
, dstPtr
+ bpt
);
1055 do_row(datatype
, comps
, srcWidthNB
,
1056 srcPtr
+ (srcWidth
* (srcHeight
- 1) + 1) * bpt
,
1057 srcPtr
+ (srcWidth
* (srcHeight
- 1) + 1) * bpt
,
1059 dstPtr
+ (dstWidth
* (dstHeight
- 1) + 1) * bpt
);
1060 /* left and right borders */
1061 if (srcHeight
== dstHeight
) {
1062 /* copy border pixel from src to dst */
1063 for (row
= 1; row
< srcHeight
; row
++) {
1064 memcpy(dstPtr
+ dstWidth
* row
* bpt
,
1065 srcPtr
+ srcWidth
* row
* bpt
, bpt
);
1066 memcpy(dstPtr
+ (dstWidth
* row
+ dstWidth
- 1) * bpt
,
1067 srcPtr
+ (srcWidth
* row
+ srcWidth
- 1) * bpt
, bpt
);
1071 /* average two src pixels each dest pixel */
1072 for (row
= 0; row
< dstHeightNB
; row
+= 2) {
1073 do_row(datatype
, comps
, 1,
1074 srcPtr
+ (srcWidth
* (row
* 2 + 1)) * bpt
,
1075 srcPtr
+ (srcWidth
* (row
* 2 + 2)) * bpt
,
1076 1, dstPtr
+ (dstWidth
* row
+ 1) * bpt
);
1077 do_row(datatype
, comps
, 1,
1078 srcPtr
+ (srcWidth
* (row
* 2 + 1) + srcWidth
- 1) * bpt
,
1079 srcPtr
+ (srcWidth
* (row
* 2 + 2) + srcWidth
- 1) * bpt
,
1080 1, dstPtr
+ (dstWidth
* row
+ 1 + dstWidth
- 1) * bpt
);
1088 make_3d_mipmap(GLenum datatype
, GLuint comps
, GLint border
,
1089 GLint srcWidth
, GLint srcHeight
, GLint srcDepth
,
1090 const GLubyte
*srcPtr
, GLint srcRowStride
,
1091 GLint dstWidth
, GLint dstHeight
, GLint dstDepth
,
1092 GLubyte
*dstPtr
, GLint dstRowStride
)
1094 const GLint bpt
= bytes_per_pixel(datatype
, comps
);
1095 const GLint srcWidthNB
= srcWidth
- 2 * border
; /* sizes w/out border */
1096 const GLint srcDepthNB
= srcDepth
- 2 * border
;
1097 const GLint dstWidthNB
= dstWidth
- 2 * border
;
1098 const GLint dstHeightNB
= dstHeight
- 2 * border
;
1099 const GLint dstDepthNB
= dstDepth
- 2 * border
;
1101 GLint bytesPerSrcImage
, bytesPerDstImage
;
1102 GLint bytesPerSrcRow
, bytesPerDstRow
;
1103 GLint srcImageOffset
, srcRowOffset
;
1105 (void) srcDepthNB
; /* silence warnings */
1108 bytesPerSrcImage
= srcWidth
* srcHeight
* bpt
;
1109 bytesPerDstImage
= dstWidth
* dstHeight
* bpt
;
1111 bytesPerSrcRow
= srcWidth
* bpt
;
1112 bytesPerDstRow
= dstWidth
* bpt
;
1114 /* Offset between adjacent src images to be averaged together */
1115 srcImageOffset
= (srcDepth
== dstDepth
) ? 0 : bytesPerSrcImage
;
1117 /* Offset between adjacent src rows to be averaged together */
1118 srcRowOffset
= (srcHeight
== dstHeight
) ? 0 : srcWidth
* bpt
;
1121 * Need to average together up to 8 src pixels for each dest pixel.
1122 * Break that down into 3 operations:
1123 * 1. take two rows from source image and average them together.
1124 * 2. take two rows from next source image and average them together.
1125 * 3. take the two averaged rows and average them for the final dst row.
1129 printf("mip3d %d x %d x %d -> %d x %d x %d\n",
1130 srcWidth, srcHeight, srcDepth, dstWidth, dstHeight, dstDepth);
1133 for (img
= 0; img
< dstDepthNB
; img
++) {
1134 /* first source image pointer, skipping border */
1135 const GLubyte
*imgSrcA
= srcPtr
1136 + (bytesPerSrcImage
+ bytesPerSrcRow
+ border
) * bpt
* border
1137 + img
* (bytesPerSrcImage
+ srcImageOffset
);
1138 /* second source image pointer, skipping border */
1139 const GLubyte
*imgSrcB
= imgSrcA
+ srcImageOffset
;
1140 /* address of the dest image, skipping border */
1141 GLubyte
*imgDst
= dstPtr
1142 + (bytesPerDstImage
+ bytesPerDstRow
+ border
) * bpt
* border
1143 + img
* bytesPerDstImage
;
1145 /* setup the four source row pointers and the dest row pointer */
1146 const GLubyte
*srcImgARowA
= imgSrcA
;
1147 const GLubyte
*srcImgARowB
= imgSrcA
+ srcRowOffset
;
1148 const GLubyte
*srcImgBRowA
= imgSrcB
;
1149 const GLubyte
*srcImgBRowB
= imgSrcB
+ srcRowOffset
;
1150 GLubyte
*dstImgRow
= imgDst
;
1152 for (row
= 0; row
< dstHeightNB
; row
++) {
1153 do_row_3D(datatype
, comps
, srcWidthNB
,
1154 srcImgARowA
, srcImgARowB
,
1155 srcImgBRowA
, srcImgBRowB
,
1156 dstWidthNB
, dstImgRow
);
1158 /* advance to next rows */
1159 srcImgARowA
+= bytesPerSrcRow
+ srcRowOffset
;
1160 srcImgARowB
+= bytesPerSrcRow
+ srcRowOffset
;
1161 srcImgBRowA
+= bytesPerSrcRow
+ srcRowOffset
;
1162 srcImgBRowB
+= bytesPerSrcRow
+ srcRowOffset
;
1163 dstImgRow
+= bytesPerDstRow
;
1168 /* Luckily we can leverage the make_2d_mipmap() function here! */
1170 /* do front border image */
1171 make_2d_mipmap(datatype
, comps
, 1, srcWidth
, srcHeight
, srcPtr
, srcRowStride
,
1172 dstWidth
, dstHeight
, dstPtr
, dstRowStride
);
1173 /* do back border image */
1174 make_2d_mipmap(datatype
, comps
, 1, srcWidth
, srcHeight
,
1175 srcPtr
+ bytesPerSrcImage
* (srcDepth
- 1), srcRowStride
,
1176 dstWidth
, dstHeight
,
1177 dstPtr
+ bytesPerDstImage
* (dstDepth
- 1), dstRowStride
);
1178 /* do four remaining border edges that span the image slices */
1179 if (srcDepth
== dstDepth
) {
1180 /* just copy border pixels from src to dst */
1181 for (img
= 0; img
< dstDepthNB
; img
++) {
1185 /* do border along [img][row=0][col=0] */
1186 src
= srcPtr
+ (img
+ 1) * bytesPerSrcImage
;
1187 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
;
1188 memcpy(dst
, src
, bpt
);
1190 /* do border along [img][row=dstHeight-1][col=0] */
1191 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1192 + (srcHeight
- 1) * bytesPerSrcRow
;
1193 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1194 + (dstHeight
- 1) * bytesPerDstRow
;
1195 memcpy(dst
, src
, bpt
);
1197 /* do border along [img][row=0][col=dstWidth-1] */
1198 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1199 + (srcWidth
- 1) * bpt
;
1200 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1201 + (dstWidth
- 1) * bpt
;
1202 memcpy(dst
, src
, bpt
);
1204 /* do border along [img][row=dstHeight-1][col=dstWidth-1] */
1205 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1206 + (bytesPerSrcImage
- bpt
);
1207 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1208 + (bytesPerDstImage
- bpt
);
1209 memcpy(dst
, src
, bpt
);
1213 /* average border pixels from adjacent src image pairs */
1214 ASSERT(srcDepthNB
== 2 * dstDepthNB
);
1215 for (img
= 0; img
< dstDepthNB
; img
++) {
1219 /* do border along [img][row=0][col=0] */
1220 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
;
1221 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
;
1222 do_row(datatype
, comps
, 1, src
, src
+ srcImageOffset
, 1, dst
);
1224 /* do border along [img][row=dstHeight-1][col=0] */
1225 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1226 + (srcHeight
- 1) * bytesPerSrcRow
;
1227 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1228 + (dstHeight
- 1) * bytesPerDstRow
;
1229 do_row(datatype
, comps
, 1, src
, src
+ srcImageOffset
, 1, dst
);
1231 /* do border along [img][row=0][col=dstWidth-1] */
1232 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1233 + (srcWidth
- 1) * bpt
;
1234 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1235 + (dstWidth
- 1) * bpt
;
1236 do_row(datatype
, comps
, 1, src
, src
+ srcImageOffset
, 1, dst
);
1238 /* do border along [img][row=dstHeight-1][col=dstWidth-1] */
1239 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1240 + (bytesPerSrcImage
- bpt
);
1241 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1242 + (bytesPerDstImage
- bpt
);
1243 do_row(datatype
, comps
, 1, src
, src
+ srcImageOffset
, 1, dst
);
1251 make_1d_stack_mipmap(GLenum datatype
, GLuint comps
, GLint border
,
1252 GLint srcWidth
, const GLubyte
*srcPtr
, GLuint srcRowStride
,
1253 GLint dstWidth
, GLint dstHeight
,
1254 GLubyte
*dstPtr
, GLuint dstRowStride
)
1256 const GLint bpt
= bytes_per_pixel(datatype
, comps
);
1257 const GLint srcWidthNB
= srcWidth
- 2 * border
; /* sizes w/out border */
1258 const GLint dstWidthNB
= dstWidth
- 2 * border
;
1259 const GLint dstHeightNB
= dstHeight
- 2 * border
;
1260 const GLint srcRowBytes
= bpt
* srcRowStride
;
1261 const GLint dstRowBytes
= bpt
* dstRowStride
;
1266 /* Compute src and dst pointers, skipping any border */
1267 src
= srcPtr
+ border
* ((srcWidth
+ 1) * bpt
);
1268 dst
= dstPtr
+ border
* ((dstWidth
+ 1) * bpt
);
1270 for (row
= 0; row
< dstHeightNB
; row
++) {
1271 do_row(datatype
, comps
, srcWidthNB
, src
, src
,
1278 /* copy left-most pixel from source */
1281 memcpy(dstPtr
, srcPtr
, bpt
);
1282 /* copy right-most pixel from source */
1283 memcpy(dstPtr
+ (dstWidth
- 1) * bpt
,
1284 srcPtr
+ (srcWidth
- 1) * bpt
,
1292 * There is quite a bit of refactoring that could be done with this function
1293 * and \c make_2d_mipmap.
1296 make_2d_stack_mipmap(GLenum datatype
, GLuint comps
, GLint border
,
1297 GLint srcWidth
, GLint srcHeight
,
1298 const GLubyte
*srcPtr
, GLint srcRowStride
,
1299 GLint dstWidth
, GLint dstHeight
, GLint dstDepth
,
1300 GLubyte
*dstPtr
, GLint dstRowStride
)
1302 const GLint bpt
= bytes_per_pixel(datatype
, comps
);
1303 const GLint srcWidthNB
= srcWidth
- 2 * border
; /* sizes w/out border */
1304 const GLint dstWidthNB
= dstWidth
- 2 * border
;
1305 const GLint dstHeightNB
= dstHeight
- 2 * border
;
1306 const GLint dstDepthNB
= dstDepth
- 2 * border
;
1307 const GLint srcRowBytes
= bpt
* srcRowStride
;
1308 const GLint dstRowBytes
= bpt
* dstRowStride
;
1309 const GLubyte
*srcA
, *srcB
;
1314 /* Compute src and dst pointers, skipping any border */
1315 srcA
= srcPtr
+ border
* ((srcWidth
+ 1) * bpt
);
1317 srcB
= srcA
+ srcRowBytes
;
1320 dst
= dstPtr
+ border
* ((dstWidth
+ 1) * bpt
);
1322 for (layer
= 0; layer
< dstDepthNB
; layer
++) {
1323 for (row
= 0; row
< dstHeightNB
; row
++) {
1324 do_row(datatype
, comps
, srcWidthNB
, srcA
, srcB
,
1326 srcA
+= 2 * srcRowBytes
;
1327 srcB
+= 2 * srcRowBytes
;
1331 /* This is ugly but probably won't be used much */
1333 /* fill in dest border */
1334 /* lower-left border pixel */
1337 memcpy(dstPtr
, srcPtr
, bpt
);
1338 /* lower-right border pixel */
1339 memcpy(dstPtr
+ (dstWidth
- 1) * bpt
,
1340 srcPtr
+ (srcWidth
- 1) * bpt
, bpt
);
1341 /* upper-left border pixel */
1342 memcpy(dstPtr
+ dstWidth
* (dstHeight
- 1) * bpt
,
1343 srcPtr
+ srcWidth
* (srcHeight
- 1) * bpt
, bpt
);
1344 /* upper-right border pixel */
1345 memcpy(dstPtr
+ (dstWidth
* dstHeight
- 1) * bpt
,
1346 srcPtr
+ (srcWidth
* srcHeight
- 1) * bpt
, bpt
);
1348 do_row(datatype
, comps
, srcWidthNB
,
1351 dstWidthNB
, dstPtr
+ bpt
);
1353 do_row(datatype
, comps
, srcWidthNB
,
1354 srcPtr
+ (srcWidth
* (srcHeight
- 1) + 1) * bpt
,
1355 srcPtr
+ (srcWidth
* (srcHeight
- 1) + 1) * bpt
,
1357 dstPtr
+ (dstWidth
* (dstHeight
- 1) + 1) * bpt
);
1358 /* left and right borders */
1359 if (srcHeight
== dstHeight
) {
1360 /* copy border pixel from src to dst */
1361 for (row
= 1; row
< srcHeight
; row
++) {
1362 memcpy(dstPtr
+ dstWidth
* row
* bpt
,
1363 srcPtr
+ srcWidth
* row
* bpt
, bpt
);
1364 memcpy(dstPtr
+ (dstWidth
* row
+ dstWidth
- 1) * bpt
,
1365 srcPtr
+ (srcWidth
* row
+ srcWidth
- 1) * bpt
, bpt
);
1369 /* average two src pixels each dest pixel */
1370 for (row
= 0; row
< dstHeightNB
; row
+= 2) {
1371 do_row(datatype
, comps
, 1,
1372 srcPtr
+ (srcWidth
* (row
* 2 + 1)) * bpt
,
1373 srcPtr
+ (srcWidth
* (row
* 2 + 2)) * bpt
,
1374 1, dstPtr
+ (dstWidth
* row
+ 1) * bpt
);
1375 do_row(datatype
, comps
, 1,
1376 srcPtr
+ (srcWidth
* (row
* 2 + 1) + srcWidth
- 1) * bpt
,
1377 srcPtr
+ (srcWidth
* (row
* 2 + 2) + srcWidth
- 1) * bpt
,
1378 1, dstPtr
+ (dstWidth
* row
+ 1 + dstWidth
- 1) * bpt
);
1387 * Down-sample a texture image to produce the next lower mipmap level.
1388 * \param comps components per texel (1, 2, 3 or 4)
1389 * \param srcRowStride stride between source rows, in texels
1390 * \param dstRowStride stride between destination rows, in texels
1393 _mesa_generate_mipmap_level(GLenum target
,
1394 GLenum datatype
, GLuint comps
,
1396 GLint srcWidth
, GLint srcHeight
, GLint srcDepth
,
1397 const GLubyte
*srcData
,
1399 GLint dstWidth
, GLint dstHeight
, GLint dstDepth
,
1404 * We use simple 2x2 averaging to compute the next mipmap level.
1408 make_1d_mipmap(datatype
, comps
, border
,
1413 case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB
:
1414 case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB
:
1415 case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB
:
1416 case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB
:
1417 case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB
:
1418 case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
:
1419 make_2d_mipmap(datatype
, comps
, border
,
1420 srcWidth
, srcHeight
, srcData
, srcRowStride
,
1421 dstWidth
, dstHeight
, dstData
, dstRowStride
);
1424 make_3d_mipmap(datatype
, comps
, border
,
1425 srcWidth
, srcHeight
, srcDepth
,
1426 srcData
, srcRowStride
,
1427 dstWidth
, dstHeight
, dstDepth
,
1428 dstData
, dstRowStride
);
1430 case GL_TEXTURE_1D_ARRAY_EXT
:
1431 make_1d_stack_mipmap(datatype
, comps
, border
,
1432 srcWidth
, srcData
, srcRowStride
,
1433 dstWidth
, dstHeight
,
1434 dstData
, dstRowStride
);
1436 case GL_TEXTURE_2D_ARRAY_EXT
:
1437 make_2d_stack_mipmap(datatype
, comps
, border
,
1438 srcWidth
, srcHeight
,
1439 srcData
, srcRowStride
,
1440 dstWidth
, dstHeight
,
1441 dstDepth
, dstData
, dstRowStride
);
1443 case GL_TEXTURE_RECTANGLE_NV
:
1444 /* no mipmaps, do nothing */
1447 _mesa_problem(NULL
, "bad dimensions in _mesa_generate_mipmaps");
1454 * compute next (level+1) image size
1455 * \return GL_FALSE if no smaller size can be generated (eg. src is 1x1x1 size)
1458 next_mipmap_level_size(GLenum target
, GLint border
,
1459 GLint srcWidth
, GLint srcHeight
, GLint srcDepth
,
1460 GLint
*dstWidth
, GLint
*dstHeight
, GLint
*dstDepth
)
1462 if (srcWidth
- 2 * border
> 1) {
1463 *dstWidth
= (srcWidth
- 2 * border
) / 2 + 2 * border
;
1466 *dstWidth
= srcWidth
; /* can't go smaller */
1469 if ((srcHeight
- 2 * border
> 1) &&
1470 (target
!= GL_TEXTURE_1D_ARRAY_EXT
)) {
1471 *dstHeight
= (srcHeight
- 2 * border
) / 2 + 2 * border
;
1474 *dstHeight
= srcHeight
; /* can't go smaller */
1477 if ((srcDepth
- 2 * border
> 1) &&
1478 (target
!= GL_TEXTURE_2D_ARRAY_EXT
)) {
1479 *dstDepth
= (srcDepth
- 2 * border
) / 2 + 2 * border
;
1482 *dstDepth
= srcDepth
; /* can't go smaller */
1485 if (*dstWidth
== srcWidth
&&
1486 *dstHeight
== srcHeight
&&
1487 *dstDepth
== srcDepth
) {
1499 * Automatic mipmap generation.
1500 * This is the fallback/default function for ctx->Driver.GenerateMipmap().
1501 * Generate a complete set of mipmaps from texObj's BaseLevel image.
1502 * Stop at texObj's MaxLevel or when we get to the 1x1 texture.
1503 * For cube maps, target will be one of
1504 * GL_TEXTURE_CUBE_MAP_POSITIVE/NEGATIVE_X/Y/Z; never GL_TEXTURE_CUBE_MAP.
1507 _mesa_generate_mipmap(struct gl_context
*ctx
, GLenum target
,
1508 struct gl_texture_object
*texObj
)
1510 const struct gl_texture_image
*srcImage
;
1511 gl_format convertFormat
;
1512 const GLubyte
*srcData
= NULL
;
1513 GLubyte
*dstData
= NULL
;
1514 GLint level
, maxLevels
;
1519 srcImage
= _mesa_select_tex_image(ctx
, texObj
, target
, texObj
->BaseLevel
);
1522 maxLevels
= _mesa_max_texture_levels(ctx
, texObj
->Target
);
1523 ASSERT(maxLevels
> 0); /* bad target */
1525 /* Find convertFormat - the format that do_row() will process */
1527 if (_mesa_is_format_compressed(srcImage
->TexFormat
)) {
1528 /* setup for compressed textures - need to allocate temporary
1529 * image buffers to hold uncompressed images.
1532 GLint components
, size
;
1535 assert(texObj
->Target
== GL_TEXTURE_2D
||
1536 texObj
->Target
== GL_TEXTURE_CUBE_MAP_ARB
);
1538 if (srcImage
->_BaseFormat
== GL_RGB
) {
1539 convertFormat
= MESA_FORMAT_RGB888
;
1542 else if (srcImage
->_BaseFormat
== GL_RGBA
) {
1543 convertFormat
= MESA_FORMAT_RGBA8888
;
1547 _mesa_problem(ctx
, "bad srcImage->_BaseFormat in _mesa_generate_mipmaps");
1551 /* allocate storage for uncompressed GL_RGB or GL_RGBA images */
1552 size
= _mesa_bytes_per_pixel(srcImage
->_BaseFormat
, CHAN_TYPE
)
1553 * srcImage
->Width
* srcImage
->Height
* srcImage
->Depth
+ 20;
1554 /* 20 extra bytes, just be safe when calling last FetchTexel */
1555 srcData
= (GLubyte
*) malloc(size
);
1557 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "generate mipmaps");
1560 dstData
= (GLubyte
*) malloc(size
/ 2); /* 1/4 would probably be OK */
1562 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "generate mipmaps");
1563 free((void *) srcData
);
1567 /* decompress base image here */
1568 dst
= (GLchan
*) srcData
;
1569 for (row
= 0; row
< srcImage
->Height
; row
++) {
1571 for (col
= 0; col
< srcImage
->Width
; col
++) {
1572 srcImage
->FetchTexelc(srcImage
, col
, row
, 0, dst
);
1579 convertFormat
= srcImage
->TexFormat
;
1582 _mesa_format_to_type_and_comps(convertFormat
, &datatype
, &comps
);
1584 for (level
= texObj
->BaseLevel
; level
< texObj
->MaxLevel
1585 && level
< maxLevels
- 1; level
++) {
1586 /* generate image[level+1] from image[level] */
1587 const struct gl_texture_image
*srcImage
;
1588 struct gl_texture_image
*dstImage
;
1589 GLint srcWidth
, srcHeight
, srcDepth
;
1590 GLint dstWidth
, dstHeight
, dstDepth
;
1592 GLboolean nextLevel
;
1594 /* get src image parameters */
1595 srcImage
= _mesa_select_tex_image(ctx
, texObj
, target
, level
);
1597 srcWidth
= srcImage
->Width
;
1598 srcHeight
= srcImage
->Height
;
1599 srcDepth
= srcImage
->Depth
;
1600 border
= srcImage
->Border
;
1602 nextLevel
= next_mipmap_level_size(target
, border
,
1603 srcWidth
, srcHeight
, srcDepth
,
1604 &dstWidth
, &dstHeight
, &dstDepth
);
1607 if (_mesa_is_format_compressed(srcImage
->TexFormat
)) {
1608 free((void *) srcData
);
1614 /* get dest gl_texture_image */
1615 dstImage
= _mesa_get_tex_image(ctx
, texObj
, target
, level
+ 1);
1617 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "generating mipmaps");
1621 /* Free old image data */
1623 ctx
->Driver
.FreeTexImageData(ctx
, dstImage
);
1625 /* initialize new image */
1626 _mesa_init_teximage_fields(ctx
, target
, dstImage
, dstWidth
, dstHeight
,
1627 dstDepth
, border
, srcImage
->InternalFormat
);
1628 dstImage
->DriverData
= NULL
;
1629 dstImage
->TexFormat
= srcImage
->TexFormat
;
1630 dstImage
->FetchTexelc
= srcImage
->FetchTexelc
;
1631 dstImage
->FetchTexelf
= srcImage
->FetchTexelf
;
1633 /* Alloc new teximage data buffer */
1635 GLuint size
= _mesa_format_image_size(dstImage
->TexFormat
,
1636 dstWidth
, dstHeight
, dstDepth
);
1637 dstImage
->Data
= _mesa_alloc_texmemory(size
);
1638 if (!dstImage
->Data
) {
1639 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "generating mipmaps");
1644 /* Setup src and dest data pointers */
1645 if (_mesa_is_format_compressed(dstImage
->TexFormat
)) {
1646 /* srcData and dstData are already set */
1651 srcData
= (const GLubyte
*) srcImage
->Data
;
1652 dstData
= (GLubyte
*) dstImage
->Data
;
1655 ASSERT(dstImage
->TexFormat
);
1656 ASSERT(dstImage
->FetchTexelc
);
1657 ASSERT(dstImage
->FetchTexelf
);
1659 _mesa_generate_mipmap_level(target
, datatype
, comps
, border
,
1660 srcWidth
, srcHeight
, srcDepth
,
1661 srcData
, srcImage
->RowStride
,
1662 dstWidth
, dstHeight
, dstDepth
,
1663 dstData
, dstImage
->RowStride
);
1666 if (_mesa_is_format_compressed(dstImage
->TexFormat
)) {
1668 /* compress image from dstData into dstImage->Data */
1669 const GLenum srcFormat
= _mesa_get_format_base_format(convertFormat
);
1671 = _mesa_format_row_stride(dstImage
->TexFormat
, dstWidth
);
1672 ASSERT(srcFormat
== GL_RGB
|| srcFormat
== GL_RGBA
);
1674 _mesa_texstore(ctx
, 2, dstImage
->_BaseFormat
,
1675 dstImage
->TexFormat
,
1677 0, 0, 0, /* dstX/Y/Zoffset */
1678 dstRowStride
, 0, /* strides */
1679 dstWidth
, dstHeight
, 1, /* size */
1680 srcFormat
, CHAN_TYPE
,
1681 dstData
, /* src data, actually */
1682 &ctx
->DefaultPacking
);
1684 /* swap src and dest pointers */
1685 temp
= (GLubyte
*) srcData
;
1690 } /* loop over mipmap levels */
1695 * Helper function for drivers which need to rescale texture images to
1696 * certain aspect ratios.
1697 * Nearest filtering only (for broken hardware that can't support
1698 * all aspect ratios). This can be made a lot faster, but I don't
1699 * really care enough...
1702 _mesa_rescale_teximage2d(GLuint bytesPerPixel
,
1703 GLuint srcStrideInPixels
,
1704 GLuint dstRowStride
,
1705 GLint srcWidth
, GLint srcHeight
,
1706 GLint dstWidth
, GLint dstHeight
,
1707 const GLvoid
*srcImage
, GLvoid
*dstImage
)
1711 #define INNER_LOOP( TYPE, HOP, WOP ) \
1712 for ( row = 0 ; row < dstHeight ; row++ ) { \
1713 GLint srcRow = row HOP hScale; \
1714 for ( col = 0 ; col < dstWidth ; col++ ) { \
1715 GLint srcCol = col WOP wScale; \
1716 dst[col] = src[srcRow * srcStrideInPixels + srcCol]; \
1718 dst = (TYPE *) ((GLubyte *) dst + dstRowStride); \
1721 #define RESCALE_IMAGE( TYPE ) \
1723 const TYPE *src = (const TYPE *)srcImage; \
1724 TYPE *dst = (TYPE *)dstImage; \
1726 if ( srcHeight < dstHeight ) { \
1727 const GLint hScale = dstHeight / srcHeight; \
1728 if ( srcWidth < dstWidth ) { \
1729 const GLint wScale = dstWidth / srcWidth; \
1730 INNER_LOOP( TYPE, /, / ); \
1733 const GLint wScale = srcWidth / dstWidth; \
1734 INNER_LOOP( TYPE, /, * ); \
1738 const GLint hScale = srcHeight / dstHeight; \
1739 if ( srcWidth < dstWidth ) { \
1740 const GLint wScale = dstWidth / srcWidth; \
1741 INNER_LOOP( TYPE, *, / ); \
1744 const GLint wScale = srcWidth / dstWidth; \
1745 INNER_LOOP( TYPE, *, * ); \
1750 switch ( bytesPerPixel
) {
1752 RESCALE_IMAGE( GLuint
);
1756 RESCALE_IMAGE( GLushort
);
1760 RESCALE_IMAGE( GLubyte
);
1763 _mesa_problem(NULL
,"unexpected bytes/pixel in _mesa_rescale_teximage2d");
1769 * Upscale an image by replication, not (typical) stretching.
1770 * We use this when the image width or height is less than a
1771 * certain size (4, 8) and we need to upscale an image.
1774 _mesa_upscale_teximage2d(GLsizei inWidth
, GLsizei inHeight
,
1775 GLsizei outWidth
, GLsizei outHeight
,
1776 GLint comps
, const GLchan
*src
, GLint srcRowStride
,
1781 ASSERT(outWidth
>= inWidth
);
1782 ASSERT(outHeight
>= inHeight
);
1784 ASSERT(inWidth
== 1 || inWidth
== 2 || inHeight
== 1 || inHeight
== 2);
1785 ASSERT((outWidth
& 3) == 0);
1786 ASSERT((outHeight
& 3) == 0);
1789 for (i
= 0; i
< outHeight
; i
++) {
1790 const GLint ii
= i
% inHeight
;
1791 for (j
= 0; j
< outWidth
; j
++) {
1792 const GLint jj
= j
% inWidth
;
1793 for (k
= 0; k
< comps
; k
++) {
1794 dest
[(i
* outWidth
+ j
) * comps
+ k
]
1795 = src
[ii
* srcRowStride
+ jj
* comps
+ k
];