1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
|
/**
* Copyright 2010 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
package com.jogamp.opengl.util;
import javax.media.opengl.GL;
import javax.media.opengl.GL2;
import javax.media.opengl.GL2ES2;
import javax.media.opengl.GL2ES3;
import javax.media.opengl.GL2GL3;
import javax.media.opengl.GLException;
/**
* Utility to safely set and restore the PACK and UNPACK pixel storage mode,
* regardless of the GLProfile.
* <p>
* PACK for GPU to CPU transfers, e.g. {@link GL#glReadPixels(int, int, int, int, int, int, java.nio.Buffer) ReadPixels}, etc.
* </p>
* <p>
* UNPACK for CPU o GPU transfers, e.g. {@link GL#glTexImage2D(int, int, int, int, int, int, int, int, long) TexImage2D}, etc
* </p>
*/
public class GLPixelStorageModes {
private final int[] cachePack = new int[8];
private final int[] cacheUnpack = new int[8];
private boolean savedPack = false;
private boolean savedUnpack = false;
/** Create instance w/o {@link #saveAll(GL)} */
public GLPixelStorageModes() {}
/** Create instance w/ {@link #saveAll(GL)} */
public GLPixelStorageModes(final GL gl) { saveAll(gl); }
/**
* Sets the {@link GL#GL_PACK_ALIGNMENT}.
* <p>
* Saves the PACK pixel storage modes if not saved yet, see {@link #savePack(GL)}.
* </p>
*/
public final void setPackAlignment(final GL gl, final int packAlignment) {
savePack(gl);
gl.glPixelStorei(GL.GL_PACK_ALIGNMENT, packAlignment);
}
/**
* Sets the {@link GL#GL_UNPACK_ALIGNMENT}.
* <p>
* Saves the UNPACK pixel storage modes if not saved yet, see {@link #saveUnpack(GL)}.
* </p>
*/
public final void setUnpackAlignment(final GL gl, final int unpackAlignment) {
saveUnpack(gl);
gl.glPixelStorei(GL.GL_UNPACK_ALIGNMENT, unpackAlignment);
}
/**
* Sets the {@link GL#GL_PACK_ALIGNMENT} and {@link GL#GL_UNPACK_ALIGNMENT}.
* <p>
* Saves the PACK and UNPACK pixel storage modes if not saved yet, see {@link #saveAll(GL)}.
* </p>
*/
public final void setAlignment(final GL gl, final int packAlignment, final int unpackAlignment) {
setPackAlignment(gl, packAlignment);
setUnpackAlignment(gl, unpackAlignment);
}
/**
* Sets the {@link GL2ES3#GL_PACK_ROW_LENGTH}.
* <p>
* Saves the PACK pixel storage modes if not saved yet, see {@link #savePack(GL)}.
* </p>
*/
public final void setPackRowLength(final GL2ES3 gl, final int packRowLength) {
savePack(gl);
gl.glPixelStorei(GL2ES3.GL_PACK_ROW_LENGTH, packRowLength);
}
/**
* Sets the {@link GL2ES2#GL_UNPACK_ROW_LENGTH}.
* <p>
* Saves the UNPACK pixel storage modes if not saved yet, see {@link #saveUnpack(GL)}.
* </p>
*/
public final void setUnpackRowLength(final GL2ES2 gl, final int unpackRowLength) {
saveUnpack(gl);
gl.glPixelStorei(GL2ES2.GL_UNPACK_ROW_LENGTH, unpackRowLength);
}
/**
* Sets the {@link GL2ES3#GL_PACK_ROW_LENGTH} and {@link GL2ES2#GL_UNPACK_ROW_LENGTH}.
* <p>
* Saves the PACK and UNPACK pixel storage modes if not saved yet, see {@link #saveAll(GL)}.
* </p>
*/
public final void setRowLength(final GL2ES3 gl, final int packRowLength, final int unpackRowLength) {
setPackRowLength(gl, packRowLength);
setUnpackRowLength(gl, unpackRowLength);
}
/**
* Saves PACK and UNPACK pixel storage modes and {@link #resetAll(GL) resets} them,
* i.e. issues {@link #savePack(GL)} and {@link #saveUnpack(GL)}.
* <p>
* Operation is skipped, if the modes were already saved.
* </p>
* <p>
* Restore via {@link #restore(GL)}
* </p>
*/
public final void saveAll(final GL gl) {
savePack(gl);
saveUnpack(gl);
}
/**
* Resets PACK and UNPACK pixel storage modes to their default value,
* i.e. issues {@link #resetPack(GL)} and {@link #resetUnpack(GL)}.
*/
public final void resetAll(final GL gl) {
resetPack(gl);
resetUnpack(gl);
}
/**
* Restores PACK and UNPACK pixel storage mode previously saved w/ {@link #saveAll(GL)}
* or {@link #savePack(GL)} and {@link #saveUnpack(GL)}.
* @throws GLException if neither PACK nor UNPACK modes were saved.
*/
public final void restore(final GL gl) throws GLException {
if(!savedPack && !savedUnpack) {
throw new GLException("Neither PACK nor UNPACK pixel storage modes were saved");
}
if( savedPack ) {
restorePack(gl);
savedPack = false;
}
if( savedUnpack ) {
restoreUnpack(gl);
savedUnpack = false;
}
}
/**
* Resets PACK pixel storage modes to their default value.
*/
public final void resetPack(final GL gl) {
// Compared w/ ES2, ES3 and GL3-core spec
gl.glPixelStorei(GL.GL_PACK_ALIGNMENT, 4); // es2, es3, gl3
if( gl.isGL2ES3() ) {
gl.glPixelStorei(GL2ES3.GL_PACK_ROW_LENGTH, 0); // es3, gl3
gl.glPixelStorei(GL2ES3.GL_PACK_SKIP_ROWS, 0); // es3, gl3
gl.glPixelStorei(GL2ES3.GL_PACK_SKIP_PIXELS, 0); // es3, gl3
if( gl.isGL2GL3() ) {
gl.glPixelStorei(GL2GL3.GL_PACK_SWAP_BYTES, GL.GL_FALSE); // gl3
gl.glPixelStorei(GL2GL3.GL_PACK_LSB_FIRST, GL.GL_FALSE); // gl3
gl.glPixelStorei(GL2GL3.GL_PACK_IMAGE_HEIGHT, 0); // gl3
gl.glPixelStorei(GL2GL3.GL_PACK_SKIP_IMAGES, 0); // gl3
}
}
}
/**
* Saves PACK pixel storage modes and {@link #resetPack(GL) resets} them.
* <p>
* Operation is skipped, if the modes were already saved.
* </p>
* <p>
* Restore via {@link #restore(GL)}
* </p>
*/
public final void savePack(final GL gl) {
if(savedPack) {
return;
}
if( gl.isGL2() ) {
// See GLStateTracker.pushAttrib(GL2.GL_CLIENT_PIXEL_STORE_BIT)
gl.getGL2().glPushClientAttrib(GL2.GL_CLIENT_PIXEL_STORE_BIT);
} else {
// ES1 or ES2 deals with pack/unpack alignment only
gl.glGetIntegerv(GL.GL_PACK_ALIGNMENT, cachePack, 0);
if( gl.isGL2ES3() ) {
gl.glGetIntegerv(GL2ES3.GL_PACK_ROW_LENGTH, cachePack, 1);
gl.glGetIntegerv(GL2ES3.GL_PACK_SKIP_ROWS, cachePack, 2);
gl.glGetIntegerv(GL2ES3.GL_PACK_SKIP_PIXELS, cachePack, 3);
if( gl.isGL2GL3() ) {
gl.glGetIntegerv(GL2GL3.GL_PACK_SWAP_BYTES, cachePack, 4);
gl.glGetIntegerv(GL2GL3.GL_PACK_LSB_FIRST, cachePack, 5);
gl.glGetIntegerv(GL2GL3.GL_PACK_IMAGE_HEIGHT, cachePack, 6);
gl.glGetIntegerv(GL2GL3.GL_PACK_SKIP_IMAGES, cachePack, 7);
}
}
}
savedPack = true;
resetPack(gl);
}
private final void restorePack(final GL gl) {
if( gl.isGL2() ) {
gl.getGL2().glPopClientAttrib();
} else {
gl.glPixelStorei(GL.GL_PACK_ALIGNMENT, cachePack[0]);
if( gl.isGL2ES3() ) {
gl.glPixelStorei(GL2ES3.GL_PACK_ROW_LENGTH, cachePack[1]);
gl.glPixelStorei(GL2ES3.GL_PACK_SKIP_ROWS, cachePack[2]);
gl.glPixelStorei(GL2ES3.GL_PACK_SKIP_PIXELS, cachePack[3]);
if( gl.isGL2GL3() ) {
gl.glPixelStorei(GL2GL3.GL_PACK_SWAP_BYTES, cachePack[4]);
gl.glPixelStorei(GL2GL3.GL_PACK_LSB_FIRST, cachePack[5]);
gl.glPixelStorei(GL2GL3.GL_PACK_IMAGE_HEIGHT, cachePack[6]);
gl.glPixelStorei(GL2GL3.GL_PACK_SKIP_IMAGES, cachePack[7]);
}
}
}
}
/**
* Resets UNPACK pixel storage modes to their default value.
*/
public final void resetUnpack(final GL gl) {
// Compared w/ ES2, ES3 and GL3-core spec
gl.glPixelStorei(GL.GL_UNPACK_ALIGNMENT, 4); // es2, es3, gl3
if( gl.isGL2ES3() ) {
gl.glPixelStorei(GL2ES2.GL_UNPACK_ROW_LENGTH, 0); // es3, gl3
gl.glPixelStorei(GL2ES2.GL_UNPACK_SKIP_ROWS, 0); // es3, gl3
gl.glPixelStorei(GL2ES2.GL_UNPACK_SKIP_PIXELS, 0); // es3, gl3
gl.glPixelStorei(GL2ES3.GL_UNPACK_IMAGE_HEIGHT, 0); // es3, gl3
gl.glPixelStorei(GL2ES3.GL_UNPACK_SKIP_IMAGES, 0); // es3, gl3
if( gl.isGL2GL3() ) {
gl.glPixelStorei(GL2GL3.GL_UNPACK_SWAP_BYTES, GL.GL_FALSE); // gl3
gl.glPixelStorei(GL2GL3.GL_UNPACK_LSB_FIRST, GL.GL_FALSE); // gl3
}
}
}
/**
* Saves UNPACK pixel storage modes and {@link #resetUnpack(GL) resets} them.
* <p>
* Operation is skipped, if the modes were already saved.
* </p>
* <p>
* Restore via {@link #restore(GL)}
* </p>
*/
public final void saveUnpack(final GL gl) {
if(savedUnpack) {
return;
}
if( gl.isGL2() ) {
// See GLStateTracker.pushAttrib(GL2.GL_CLIENT_PIXEL_STORE_BIT)
gl.getGL2().glPushClientAttrib(GL2.GL_CLIENT_PIXEL_STORE_BIT);
} else {
// ES1 or ES2 deals with pack/unpack alignment only
gl.glGetIntegerv(GL.GL_UNPACK_ALIGNMENT, cacheUnpack, 0);
if( gl.isGL2ES3() ) {
gl.glGetIntegerv(GL2ES2.GL_UNPACK_ROW_LENGTH, cacheUnpack, 1);
gl.glGetIntegerv(GL2ES2.GL_UNPACK_SKIP_ROWS, cacheUnpack, 2);
gl.glGetIntegerv(GL2ES2.GL_UNPACK_SKIP_PIXELS, cacheUnpack, 3);
gl.glGetIntegerv(GL2ES3.GL_UNPACK_IMAGE_HEIGHT, cacheUnpack, 4);
gl.glGetIntegerv(GL2ES3.GL_UNPACK_SKIP_IMAGES, cacheUnpack, 5);
if( gl.isGL2GL3() ) {
gl.glGetIntegerv(GL2GL3.GL_UNPACK_SWAP_BYTES, cacheUnpack, 6);
gl.glGetIntegerv(GL2GL3.GL_UNPACK_LSB_FIRST, cacheUnpack, 7);
}
}
}
savedUnpack = true;
resetUnpack(gl);
}
private final void restoreUnpack(final GL gl) {
if( gl.isGL2() ) {
gl.getGL2().glPopClientAttrib();
} else {
gl.glPixelStorei(GL.GL_UNPACK_ALIGNMENT, cacheUnpack[0]);
if( gl.isGL2ES3() ) {
gl.glPixelStorei(GL2ES2.GL_UNPACK_ROW_LENGTH, cacheUnpack[1]);
gl.glPixelStorei(GL2ES2.GL_UNPACK_SKIP_ROWS, cacheUnpack[2]);
gl.glPixelStorei(GL2ES2.GL_UNPACK_SKIP_PIXELS, cacheUnpack[3]);
gl.glPixelStorei(GL2ES3.GL_UNPACK_IMAGE_HEIGHT, cacheUnpack[4]);
gl.glPixelStorei(GL2ES3.GL_UNPACK_SKIP_IMAGES, cacheUnpack[5]);
if( gl.isGL2GL3() ) {
gl.glPixelStorei(GL2GL3.GL_UNPACK_SWAP_BYTES, cacheUnpack[6]);
gl.glPixelStorei(GL2GL3.GL_UNPACK_LSB_FIRST, cacheUnpack[7]);
}
}
}
}
}
|
