/
DistortionRenderer.java
527 lines (422 loc) · 19.1 KB
/
DistortionRenderer.java
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
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
/*
* Copyright 2014 Google Inc. All Rights Reserved.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.vrtoolkit.cardboard;
import android.opengl.GLES20;
import android.util.Log;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;
/**
* Encapsulates the rendering operations to correct lens distortion.
*/
public class DistortionRenderer
{
private static final String TAG = "DistortionRenderer";
private int mTextureId;
private int mRenderbufferId;
private int mFramebufferId;
private IntBuffer mOriginalFramebufferId;
private IntBuffer mCullFaceEnabled;
private IntBuffer mScissorTestEnabled;
private IntBuffer mViewport;
private float mResolutionScale;
private DistortionMesh mLeftEyeDistortionMesh;
private DistortionMesh mRightEyeDistortionMesh;
private HeadMountedDisplay mHmd;
private FieldOfView mLeftEyeFov;
private FieldOfView mRightEyeFov;
private ProgramHolder mProgramHolder;
private final String VERTEX_SHADER = "attribute vec2 aPosition;\nattribute float aVignette;\nattribute vec2 aTextureCoord;\nvarying vec2 vTextureCoord;\nvarying float vVignette;\nuniform float uTextureCoordScale;\nvoid main() {\n gl_Position = vec4(aPosition, 0.0, 1.0);\n vTextureCoord = aTextureCoord.xy * uTextureCoordScale;\n vVignette = aVignette;\n}\n";
private final String FRAGMENT_SHADER = "precision mediump float;\nvarying vec2 vTextureCoord;\nvarying float vVignette;\nuniform sampler2D uTextureSampler;\nvoid main() {\n gl_FragColor = vVignette * texture2D(uTextureSampler, vTextureCoord);\n}\n";
public DistortionRenderer()
{
mTextureId = -1;
mRenderbufferId = -1;
mFramebufferId = -1;
mOriginalFramebufferId = IntBuffer.allocate(1);
mCullFaceEnabled = IntBuffer.allocate(1);
mScissorTestEnabled = IntBuffer.allocate(1);
mViewport = IntBuffer.allocate(4);
mResolutionScale = 1.0F;
}
public void beforeDrawFrame()
{
GLES20.glGetIntegerv(36006, mOriginalFramebufferId);
GLES20.glBindFramebuffer(36160, mFramebufferId);
}
public void afterDrawFrame()
{
GLES20.glBindFramebuffer(36160, mOriginalFramebufferId.array()[0]);
GLES20.glViewport(0, 0, mHmd.getScreen().getWidth(), mHmd.getScreen().getHeight());
GLES20.glGetIntegerv(2978, mViewport);
GLES20.glGetIntegerv(2884, mCullFaceEnabled);
GLES20.glGetIntegerv(3089, mScissorTestEnabled);
GLES20.glDisable(3089);
GLES20.glDisable(2884);
GLES20.glClearColor(0.0F, 0.0F, 0.0F, 1.0F);
GLES20.glClear(16640);
GLES20.glUseProgram(mProgramHolder.program);
GLES20.glEnable(3089);
GLES20.glScissor(0, 0, mHmd.getScreen().getWidth() / 2, mHmd.getScreen().getHeight());
renderDistortionMesh(mLeftEyeDistortionMesh);
GLES20.glScissor(mHmd.getScreen().getWidth() / 2, 0, mHmd.getScreen().getWidth() / 2, mHmd.getScreen().getHeight());
renderDistortionMesh(mRightEyeDistortionMesh);
GLES20.glDisableVertexAttribArray(mProgramHolder.aPosition);
GLES20.glDisableVertexAttribArray(mProgramHolder.aVignette);
GLES20.glDisableVertexAttribArray(mProgramHolder.aTextureCoord);
GLES20.glUseProgram(0);
GLES20.glBindBuffer(34962, 0);
GLES20.glBindBuffer(34963, 0);
GLES20.glDisable(3089);
if (mCullFaceEnabled.array()[0] == 1) {
GLES20.glEnable(2884);
}
if (mScissorTestEnabled.array()[0] == 1) {
GLES20.glEnable(3089);
}
GLES20.glViewport(mViewport.array()[0], mViewport.array()[1], mViewport.array()[2], mViewport.array()[3]);
}
public void setResolutionScale(float scale)
{
mResolutionScale = scale;
}
public void onProjectionChanged(HeadMountedDisplay hmd, EyeParams leftEye, EyeParams rightEye, float zNear, float zFar)
{
mHmd = new HeadMountedDisplay(hmd);
mLeftEyeFov = new FieldOfView(leftEye.getFov());
mRightEyeFov = new FieldOfView(rightEye.getFov());
ScreenParams screen = mHmd.getScreen();
CardboardDeviceParams cdp = mHmd.getCardboard();
if (mProgramHolder == null) {
mProgramHolder = createProgramHolder();
}
EyeViewport leftEyeViewport = initViewportForEye(leftEye, 0.0F);
EyeViewport rightEyeViewport = initViewportForEye(rightEye, leftEyeViewport.width);
leftEye.getFov().toPerspectiveMatrix(zNear, zFar, leftEye.getTransform().getPerspective(), 0);
rightEye.getFov().toPerspectiveMatrix(zNear, zFar, rightEye.getTransform().getPerspective(), 0);
float textureWidthM = leftEyeViewport.width + rightEyeViewport.width;
float textureHeightM = Math.max(leftEyeViewport.height, rightEyeViewport.height);
float xPxPerM = screen.getWidth() / screen.getWidthMeters();
float yPxPerM = screen.getHeight() / screen.getHeightMeters();
int textureWidthPx = Math.round(textureWidthM * xPxPerM);
int textureHeightPx = Math.round(textureHeightM * yPxPerM);
float xEyeOffsetMScreen = screen.getWidthMeters() / 2.0F - cdp.getInterpupillaryDistance() / 2.0F;
float yEyeOffsetMScreen = cdp.getVerticalDistanceToLensCenter() - screen.getBorderSizeMeters();
mLeftEyeDistortionMesh = createDistortionMesh(leftEye, leftEyeViewport, textureWidthM, textureHeightM, xEyeOffsetMScreen, yEyeOffsetMScreen);
xEyeOffsetMScreen = screen.getWidthMeters() - xEyeOffsetMScreen;
mRightEyeDistortionMesh = createDistortionMesh(rightEye, rightEyeViewport, textureWidthM, textureHeightM, xEyeOffsetMScreen, yEyeOffsetMScreen);
setupRenderTextureAndRenderbuffer(textureWidthPx, textureHeightPx);
}
private EyeViewport initViewportForEye(EyeParams eye, float xOffsetM)
{
ScreenParams screen = mHmd.getScreen();
CardboardDeviceParams cdp = mHmd.getCardboard();
float eyeToScreenDistanceM = cdp.getEyeToLensDistance() + cdp.getScreenToLensDistance();
float leftM = (float)Math.tan(Math.toRadians(eye.getFov().getLeft())) * eyeToScreenDistanceM;
float rightM = (float)Math.tan(Math.toRadians(eye.getFov().getRight())) * eyeToScreenDistanceM;
float bottomM = (float)Math.tan(Math.toRadians(eye.getFov().getBottom())) * eyeToScreenDistanceM;
float topM = (float)Math.tan(Math.toRadians(eye.getFov().getTop())) * eyeToScreenDistanceM;
EyeViewport vp = new EyeViewport();
vp.x = xOffsetM;
vp.y = 0.0F;
vp.width = (leftM + rightM);
vp.height = (bottomM + topM);
vp.eyeX = (leftM + xOffsetM);
vp.eyeY = bottomM;
float xPxPerM = screen.getWidth() / screen.getWidthMeters();
float yPxPerM = screen.getHeight() / screen.getHeightMeters();
eye.getViewport().x = Math.round(vp.x * xPxPerM);
eye.getViewport().y = Math.round(vp.y * xPxPerM);
eye.getViewport().width = Math.round(vp.width * xPxPerM);
eye.getViewport().height = Math.round(vp.height * xPxPerM);
return vp;
}
private DistortionMesh createDistortionMesh(EyeParams eye, EyeViewport eyeViewport, float textureWidthM, float textureHeightM, float xEyeOffsetMScreen, float yEyeOffsetMScreen)
{
return new DistortionMesh(eye, mHmd.getCardboard().getDistortion(), mHmd.getScreen().getWidthMeters(), mHmd.getScreen().getHeightMeters(), xEyeOffsetMScreen, yEyeOffsetMScreen, textureWidthM, textureHeightM, eyeViewport.eyeX, eyeViewport.eyeY, eyeViewport.x, eyeViewport.y, eyeViewport.width, eyeViewport.height);
}
private void renderDistortionMesh(DistortionMesh mesh)
{
GLES20.glBindBuffer(34962, mesh.mArrayBufferId);
mesh.getClass(); mesh.getClass(); GLES20.glVertexAttribPointer(mProgramHolder.aPosition, 3, 5126, false, 20, 0 * 4);
GLES20.glEnableVertexAttribArray(mProgramHolder.aPosition);
mesh.getClass(); mesh.getClass(); GLES20.glVertexAttribPointer(mProgramHolder.aVignette, 1, 5126, false, 20, 2 * 4);
GLES20.glEnableVertexAttribArray(mProgramHolder.aVignette);
mesh.getClass(); mesh.getClass(); GLES20.glVertexAttribPointer(mProgramHolder.aTextureCoord, 2, 5126, false, 20, 3 * 4);
GLES20.glEnableVertexAttribArray(mProgramHolder.aTextureCoord);
GLES20.glActiveTexture(33984);
GLES20.glBindTexture(3553, mTextureId);
GLES20.glUniform1i(mProgramHolder.uTextureSampler, 0);
GLES20.glUniform1f(mProgramHolder.uTextureCoordScale, mResolutionScale);
GLES20.glBindBuffer(34963, mesh.mElementBufferId);
GLES20.glDrawElements(5, mesh.nIndices, 5125, 0);
}
private float computeDistortionScale(Distortion distortion, float screenWidthM, float interpupillaryDistanceM)
{
return distortion.distortionFactor((screenWidthM / 2.0F - interpupillaryDistanceM / 2.0F) / (screenWidthM / 4.0F));
}
private int createTexture(int width, int height)
{
int[] textureIds = new int[1];
GLES20.glGenTextures(1, textureIds, 0);
GLES20.glBindTexture(3553, textureIds[0]);
GLES20.glTexParameteri(3553, 10242, 33071);
GLES20.glTexParameteri(3553, 10243, 33071);
GLES20.glTexParameteri(3553, 10240, 9729);
GLES20.glTexParameteri(3553, 10241, 9729);
GLES20.glTexImage2D(3553, 0, 6407, width, height, 0, 6407, 33635, null);
return textureIds[0];
}
private int setupRenderTextureAndRenderbuffer(int width, int height)
{
if (mTextureId != -1) {
GLES20.glDeleteTextures(1, new int[] { mTextureId }, 0);
}
if (mRenderbufferId != -1) {
GLES20.glDeleteRenderbuffers(1, new int[] { mRenderbufferId }, 0);
}
if (mFramebufferId != -1) {
GLES20.glDeleteFramebuffers(1, new int[] { mFramebufferId }, 0);
}
mTextureId = createTexture(width, height);
checkGlError("setupRenderTextureAndRenderbuffer: create texture");
int[] renderbufferIds = new int[1];
GLES20.glGenRenderbuffers(1, renderbufferIds, 0);
GLES20.glBindRenderbuffer(36161, renderbufferIds[0]);
GLES20.glRenderbufferStorage(36161, 33189, width, height);
mRenderbufferId = renderbufferIds[0];
checkGlError("setupRenderTextureAndRenderbuffer: create renderbuffer");
int[] framebufferIds = new int[1];
GLES20.glGenFramebuffers(1, framebufferIds, 0);
GLES20.glBindFramebuffer(36160, framebufferIds[0]);
mFramebufferId = framebufferIds[0];
GLES20.glFramebufferTexture2D(36160, 36064, 3553, mTextureId, 0);
GLES20.glFramebufferRenderbuffer(36160, 36096, 36161, renderbufferIds[0]);
int status = GLES20.glCheckFramebufferStatus(36160);
if (status != 36053) {
throw new RuntimeException("Framebuffer is not complete: " + Integer.toHexString(status));
}
GLES20.glBindFramebuffer(36160, 0);
return framebufferIds[0];
}
private int loadShader(int shaderType, String source) {
int shader = GLES20.glCreateShader(shaderType);
if (shader != 0) {
GLES20.glShaderSource(shader, source);
GLES20.glCompileShader(shader);
int[] compiled = new int[1];
GLES20.glGetShaderiv(shader, 35713, compiled, 0);
if (compiled[0] == 0) {
Log.e("DistortionRenderer", "Could not compile shader " + shaderType + ":");
Log.e("DistortionRenderer", GLES20.glGetShaderInfoLog(shader));
GLES20.glDeleteShader(shader);
shader = 0;
}
}
return shader;
}
private int createProgram(String vertexSource, String fragmentSource) {
int vertexShader = loadShader(35633, vertexSource);
if (vertexShader == 0) {
return 0;
}
int pixelShader = loadShader(35632, fragmentSource);
if (pixelShader == 0) {
return 0;
}
int program = GLES20.glCreateProgram();
if (program != 0) {
GLES20.glAttachShader(program, vertexShader);
checkGlError("glAttachShader");
GLES20.glAttachShader(program, pixelShader);
checkGlError("glAttachShader");
GLES20.glLinkProgram(program);
int[] linkStatus = new int[1];
GLES20.glGetProgramiv(program, 35714, linkStatus, 0);
if (linkStatus[0] != 1) {
Log.e("DistortionRenderer", "Could not link program: ");
Log.e("DistortionRenderer", GLES20.glGetProgramInfoLog(program));
GLES20.glDeleteProgram(program);
program = 0;
}
}
return program;
}
private ProgramHolder createProgramHolder() {
ProgramHolder holder = new ProgramHolder();
holder.program = createProgram("attribute vec2 aPosition;\nattribute float aVignette;\nattribute vec2 aTextureCoord;\nvarying vec2 vTextureCoord;\nvarying float vVignette;\nuniform float uTextureCoordScale;\nvoid main() {\n gl_Position = vec4(aPosition, 0.0, 1.0);\n vTextureCoord = aTextureCoord.xy * uTextureCoordScale;\n vVignette = aVignette;\n}\n", "precision mediump float;\nvarying vec2 vTextureCoord;\nvarying float vVignette;\nuniform sampler2D uTextureSampler;\nvoid main() {\n gl_FragColor = vVignette * texture2D(uTextureSampler, vTextureCoord);\n}\n");
if (holder.program == 0) {
throw new RuntimeException("Could not create program");
}
holder.aPosition = GLES20.glGetAttribLocation(holder.program, "aPosition");
checkGlError("glGetAttribLocation aPosition");
if (holder.aPosition == -1) {
throw new RuntimeException("Could not get attrib location for aPosition");
}
holder.aVignette = GLES20.glGetAttribLocation(holder.program, "aVignette");
checkGlError("glGetAttribLocation aVignette");
if (holder.aVignette == -1) {
throw new RuntimeException("Could not get attrib location for aVignette");
}
holder.aTextureCoord = GLES20.glGetAttribLocation(holder.program, "aTextureCoord");
checkGlError("glGetAttribLocation aTextureCoord");
if (holder.aTextureCoord == -1) {
throw new RuntimeException("Could not get attrib location for aTextureCoord");
}
holder.uTextureCoordScale = GLES20.glGetUniformLocation(holder.program, "uTextureCoordScale");
checkGlError("glGetUniformLocation uTextureCoordScale");
if (holder.uTextureCoordScale == -1) {
throw new RuntimeException("Could not get attrib location for uTextureCoordScale");
}
holder.uTextureSampler = GLES20.glGetUniformLocation(holder.program, "uTextureSampler");
checkGlError("glGetUniformLocation uTextureSampler");
if (holder.uTextureSampler == -1) {
throw new RuntimeException("Could not get attrib location for uTextureSampler");
}
return holder;
}
private void checkGlError(String op)
{
int error;
if ((error = GLES20.glGetError()) != 0) {
Log.e("DistortionRenderer", op + ": glError " + error);
throw new RuntimeException(op + ": glError " + error);
}
}
private static float clamp(float val, float min, float max) {
return Math.max(min, Math.min(max, val));
}
private class DistortionMesh
{
private static final String TAG = "DistortionMesh";
public static final int BYTES_PER_FLOAT = 4;
public static final int BYTES_PER_INT = 4;
public final int COMPONENTS_PER_VERT = 5;
public final int DATA_STRIDE_BYTES = 20;
public final int DATA_POS_OFFSET = 0;
public final int DATA_VIGNETTE_OFFSET = 2;
public final int DATA_UV_OFFSET = 3;
public final int ROWS = 40;
public final int COLS = 40;
public final float VIGNETTE_SIZE_M_SCREEN = 0.002F;
public int nIndices;
public int mArrayBufferId = -1;
public int mElementBufferId = -1;
public DistortionMesh(EyeParams eye, Distortion distortion, float screenWidthM, float screenHeightM, float xEyeOffsetMScreen, float yEyeOffsetMScreen, float textureWidthM, float textureHeightM, float xEyeOffsetMTexture, float yEyeOffsetMTexture, float viewportXMTexture, float viewportYMTexture, float viewportWidthMTexture, float viewportHeightMTexture)
{
float mPerUScreen = screenWidthM;
float mPerVScreen = screenHeightM;
float mPerUTexture = textureWidthM;
float mPerVTexture = textureHeightM;
float[] vertexData = new float[8000];
int vertexOffset = 0;
for (int row = 0; row < 40; row++) {
for (int col = 0; col < 40; col++)
{
float uTexture = col / 39.0F * (viewportWidthMTexture / textureWidthM) + viewportXMTexture / textureWidthM;
float vTexture = row / 39.0F * (viewportHeightMTexture / textureHeightM) + viewportYMTexture / textureHeightM;
float xTexture = uTexture * mPerUTexture;
float yTexture = vTexture * mPerVTexture;
float xTextureEye = xTexture - xEyeOffsetMTexture;
float yTextureEye = yTexture - yEyeOffsetMTexture;
float rTexture = (float)Math.sqrt(xTextureEye * xTextureEye + yTextureEye * yTextureEye);
float textureToScreen = rTexture > 0.0F ? distortion.distortInverse(rTexture) / rTexture : 1.0F;
float xScreen = xTextureEye * textureToScreen + xEyeOffsetMScreen;
float yScreen = yTextureEye * textureToScreen + yEyeOffsetMScreen;
float uScreen = xScreen / mPerUScreen;
float vScreen = yScreen / mPerVScreen;
float vignetteSizeMTexture = 0.002F / textureToScreen;
float dxTexture = xTexture - DistortionRenderer.clamp(xTexture, viewportXMTexture + vignetteSizeMTexture, viewportXMTexture + viewportWidthMTexture - vignetteSizeMTexture);
float dyTexture = yTexture - DistortionRenderer.clamp(yTexture, viewportYMTexture + vignetteSizeMTexture, viewportYMTexture + viewportHeightMTexture - vignetteSizeMTexture);
float drTexture = (float)Math.sqrt(dxTexture * dxTexture + dyTexture * dyTexture);
float vignette = 1.0F - DistortionRenderer.clamp(drTexture / vignetteSizeMTexture, 0.0F, 1.0F);
vertexData[(vertexOffset + 0)] = (2.0F * uScreen - 1.0F);
vertexData[(vertexOffset + 1)] = (2.0F * vScreen - 1.0F);
vertexData[(vertexOffset + 2)] = vignette;
vertexData[(vertexOffset + 3)] = uTexture;
vertexData[(vertexOffset + 4)] = vTexture;
vertexOffset += 5;
}
}
nIndices = 3158;
int[] indexData = new int[nIndices];
int indexOffset = 0;
vertexOffset = 0;
for (int row = 0; row < 39; row++) {
if (row > 0) {
indexData[indexOffset] = indexData[(indexOffset - 1)];
indexOffset++;
}
for (int col = 0; col < 40; col++) {
if (col > 0) {
if (row % 2 == 0)
{
vertexOffset++;
}
else {
vertexOffset--;
}
}
indexData[(indexOffset++)] = vertexOffset;
indexData[(indexOffset++)] = (vertexOffset + 40);
}
vertexOffset += 40;
}
FloatBuffer vertexBuffer = ByteBuffer.allocateDirect(vertexData.length * 4).order(ByteOrder.nativeOrder()).asFloatBuffer();
vertexBuffer.put(vertexData).position(0);
IntBuffer indexBuffer = ByteBuffer.allocateDirect(indexData.length * 4).order(ByteOrder.nativeOrder()).asIntBuffer();
indexBuffer.put(indexData).position(0);
int[] bufferIds = new int[2];
GLES20.glGenBuffers(2, bufferIds, 0);
mArrayBufferId = bufferIds[0];
mElementBufferId = bufferIds[1];
GLES20.glBindBuffer(34962, mArrayBufferId);
GLES20.glBufferData(34962, vertexData.length * 4, vertexBuffer, 35044);
GLES20.glBindBuffer(34963, mElementBufferId);
GLES20.glBufferData(34963, indexData.length * 4, indexBuffer, 35044);
GLES20.glBindBuffer(34962, 0);
GLES20.glBindBuffer(34963, 0);
}
}
private class EyeViewport
{
public float x;
public float y;
public float width;
public float height;
public float eyeX;
public float eyeY;
private EyeViewport()
{
}
public String toString()
{
return "EyeViewport {x:" + x + " y:" + y + " width:" + width + " height:" + height + " eyeX: " + eyeX + " eyeY: " + eyeY + "}";
}
}
private class ProgramHolder
{
public int program;
public int aPosition;
public int aVignette;
public int aTextureCoord;
public int uTextureCoordScale;
public int uTextureSampler;
private ProgramHolder()
{
}
}
}