summaryrefslogtreecommitdiff
path: root/indra/newview/llvlcomposition.cpp
blob: e90a2470d4724144d1ddc9d4bbfa2baaa9224226 (plain)
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
/** 
 * @file llvlcomposition.cpp
 * @brief Viewer-side representation of a composition layer...
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"

#include "llvlcomposition.h"

#include "imageids.h"
#include "llerror.h"
#include "v3math.h"
#include "llsurface.h"
#include "lltextureview.h"
#include "llviewertexture.h"
#include "llviewertexturelist.h"
#include "llviewerregion.h"
#include "noise.h"
#include "llregionhandle.h" // for from_region_handle
#include "llviewercontrol.h"



F32 bilinear(const F32 v00, const F32 v01, const F32 v10, const F32 v11, const F32 x_frac, const F32 y_frac)
{
	// Not sure if this is the right math...
	// Take weighted average of all four points (bilinear interpolation)
	F32 result;

	const F32 inv_x_frac = 1.f - x_frac;
	const F32 inv_y_frac = 1.f - y_frac;
	result = inv_x_frac*inv_y_frac*v00
			+ x_frac*inv_y_frac*v10
			+ inv_x_frac*y_frac*v01
			+ x_frac*y_frac*v11;

	return result;
}


LLVLComposition::LLVLComposition(LLSurface *surfacep, const U32 width, const F32 scale) :
	LLViewerLayer(width, scale),
	mParamsReady(FALSE)
{
	mSurfacep = surfacep;

	// Load Terrain Textures - Original ones
	setDetailTextureID(0, TERRAIN_DIRT_DETAIL);
	setDetailTextureID(1, TERRAIN_GRASS_DETAIL);
	setDetailTextureID(2, TERRAIN_MOUNTAIN_DETAIL);
	setDetailTextureID(3, TERRAIN_ROCK_DETAIL);

	// Initialize the texture matrix to defaults.
	for (S32 i = 0; i < CORNER_COUNT; ++i)
	{
		mStartHeight[i] = gSavedSettings.getF32("TerrainColorStartHeight");
		mHeightRange[i] = gSavedSettings.getF32("TerrainColorHeightRange");
	}
	mTexScaleX = 16.f;
	mTexScaleY = 16.f;
	mTexturesLoaded = FALSE;
}


LLVLComposition::~LLVLComposition()
{
}


void LLVLComposition::setSurface(LLSurface *surfacep)
{
	mSurfacep = surfacep;
}


void LLVLComposition::setDetailTextureID(S32 corner, const LLUUID& id)
{
	if(id.isNull())
	{
		return;
	}
	mDetailTextures[corner] = LLViewerTextureManager::getFetchedTexture(id);
	mDetailTextures[corner]->setNoDelete() ;
	mRawImages[corner] = NULL;
}

BOOL LLVLComposition::generateHeights(const F32 x, const F32 y,
									  const F32 width, const F32 height)
{
	if (!mParamsReady)
	{
		// All the parameters haven't been set yet (we haven't gotten the message from the sim)
		return FALSE;
	}

	llassert(mSurfacep);

	if (!mSurfacep || !mSurfacep->getRegion()) 
	{
		// We don't always have the region yet here....
		return FALSE;
	}

	S32 x_begin, y_begin, x_end, y_end;

	x_begin = llround( x * mScaleInv );
	y_begin = llround( y * mScaleInv );
	x_end = llround( (x + width) * mScaleInv );
	y_end = llround( (y + width) * mScaleInv );

	if (x_end > mWidth)
	{
		x_end = mWidth;
	}
	if (y_end > mWidth)
	{
		y_end = mWidth;
	}

	LLVector3d origin_global = from_region_handle(mSurfacep->getRegion()->getHandle());

	// For perlin noise generation...
	const F32 slope_squared = 1.5f*1.5f;
	const F32 xyScale = 4.9215f; //0.93284f;
	const F32 zScale = 4; //0.92165f;
	const F32 z_offset = 0.f;
	const F32 noise_magnitude = 2.f;		//  Degree to which noise modulates composition layer (versus
											//  simple height)

	// Heights map into textures as 0-1 = first, 1-2 = second, etc.
	// So we need to compress heights into this range.
	const S32 NUM_TEXTURES = 4;

	const F32 xyScaleInv = (1.f / xyScale);
	const F32 zScaleInv = (1.f / zScale);

	const F32 inv_width = 1.f/mWidth;

	// OK, for now, just have the composition value equal the height at the point.
	for (S32 j = y_begin; j < y_end; j++)
	{
		for (S32 i = x_begin; i < x_end; i++)
		{

			F32 vec[3];
			F32 vec1[3];
			F32 twiddle;

			// Bilinearly interpolate the start height and height range of the textures
			F32 start_height = bilinear(mStartHeight[SOUTHWEST],
										mStartHeight[SOUTHEAST],
										mStartHeight[NORTHWEST],
										mStartHeight[NORTHEAST],
										i*inv_width, j*inv_width); // These will be bilinearly interpolated
			F32 height_range = bilinear(mHeightRange[SOUTHWEST],
										mHeightRange[SOUTHEAST],
										mHeightRange[NORTHWEST],
										mHeightRange[NORTHEAST],
										i*inv_width, j*inv_width); // These will be bilinearly interpolated

			LLVector3 location(i*mScale, j*mScale, 0.f);

			F32 height = mSurfacep->resolveHeightRegion(location) + z_offset;

			// Step 0: Measure the exact height at this texel
			vec[0] = (F32)(origin_global.mdV[VX]+location.mV[VX])*xyScaleInv;	//  Adjust to non-integer lattice
			vec[1] = (F32)(origin_global.mdV[VY]+location.mV[VY])*xyScaleInv;
			vec[2] = height*zScaleInv;
			//
			//  Choose material value by adding to the exact height a random value 
			//
			vec1[0] = vec[0]*(0.2222222222f);
			vec1[1] = vec[1]*(0.2222222222f);
			vec1[2] = vec[2]*(0.2222222222f);
			twiddle = noise2(vec1)*6.5f;					//  Low freq component for large divisions

			twiddle += turbulence2(vec, 2)*slope_squared;	//  High frequency component
			twiddle *= noise_magnitude;

			F32 scaled_noisy_height = (height + twiddle - start_height) * F32(NUM_TEXTURES) / height_range;

			scaled_noisy_height = llmax(0.f, scaled_noisy_height);
			scaled_noisy_height = llmin(3.f, scaled_noisy_height);
			*(mDatap + i + j*mWidth) = scaled_noisy_height;
		}
	}
	return TRUE;
}

static const U32 BASE_SIZE = 128;

BOOL LLVLComposition::generateComposition()
{

	if (!mParamsReady)
	{
		// All the parameters haven't been set yet (we haven't gotten the message from the sim)
		return FALSE;
	}

	for (S32 i = 0; i < 4; i++)
	{
		if (mDetailTextures[i]->getDiscardLevel() < 0)
		{
			mDetailTextures[i]->setBoostLevel(LLGLTexture::BOOST_TERRAIN); // in case we are at low detail
			mDetailTextures[i]->addTextureStats(BASE_SIZE*BASE_SIZE);
			return FALSE;
		}
		if ((mDetailTextures[i]->getDiscardLevel() != 0 &&
			 (mDetailTextures[i]->getWidth() < BASE_SIZE ||
			  mDetailTextures[i]->getHeight() < BASE_SIZE)))
		{
			S32 width = mDetailTextures[i]->getFullWidth();
			S32 height = mDetailTextures[i]->getFullHeight();
			S32 min_dim = llmin(width, height);
			S32 ddiscard = 0;
			while (min_dim > BASE_SIZE && ddiscard < MAX_DISCARD_LEVEL)
			{
				ddiscard++;
				min_dim /= 2;
			}
			mDetailTextures[i]->setBoostLevel(LLGLTexture::BOOST_TERRAIN); // in case we are at low detail
			mDetailTextures[i]->setMinDiscardLevel(ddiscard);
			return FALSE;
		}
	}
	
	return TRUE;
}

BOOL LLVLComposition::generateTexture(const F32 x, const F32 y,
									  const F32 width, const F32 height)
{
	llassert(mSurfacep);
	llassert(x >= 0.f);
	llassert(y >= 0.f);

	LLTimer gen_timer;

	///////////////////////////
	//
	// Generate raw data arrays for surface textures
	//
	//

	// These have already been validated by generateComposition.
	U8* st_data[4];
	S32 st_data_size[4]; // for debugging

	for (S32 i = 0; i < 4; i++)
	{
		if (mRawImages[i].isNull())
		{
			// Read back a raw image for this discard level, if it exists
			S32 min_dim = llmin(mDetailTextures[i]->getFullWidth(), mDetailTextures[i]->getFullHeight());
			S32 ddiscard = 0;
			while (min_dim > BASE_SIZE && ddiscard < MAX_DISCARD_LEVEL)
			{
				ddiscard++;
				min_dim /= 2;
			}

			BOOL delete_raw = (mDetailTextures[i]->reloadRawImage(ddiscard) != NULL) ;
			if(mDetailTextures[i]->getRawImageLevel() != ddiscard)//raw iamge is not ready, will enter here again later.
			{
				if(delete_raw)
				{
					mDetailTextures[i]->destroyRawImage() ;
				}
				lldebugs << "cached raw data for terrain detail texture is not ready yet: " << mDetailTextures[i]->getID() << llendl;
				return FALSE;
			}

			mRawImages[i] = mDetailTextures[i]->getRawImage() ;
			if(delete_raw)
			{
				mDetailTextures[i]->destroyRawImage() ;
			}
			if (mDetailTextures[i]->getWidth(ddiscard) != BASE_SIZE ||
				mDetailTextures[i]->getHeight(ddiscard) != BASE_SIZE ||
				mDetailTextures[i]->getComponents() != 3)
			{
				LLPointer<LLImageRaw> newraw = new LLImageRaw(BASE_SIZE, BASE_SIZE, 3);
				newraw->composite(mRawImages[i]);
				mRawImages[i] = newraw; // deletes old
			}
		}
		st_data[i] = mRawImages[i]->getData();
		st_data_size[i] = mRawImages[i]->getDataSize();
	}

	///////////////////////////////////////
	//
	// Generate and clamp x/y bounding box.
	//
	//

	S32 x_begin, y_begin, x_end, y_end;
	x_begin = (S32)(x * mScaleInv);
	y_begin = (S32)(y * mScaleInv);
	x_end = llround( (x + width) * mScaleInv );
	y_end = llround( (y + width) * mScaleInv );

	if (x_end > mWidth)
	{
		llwarns << "x end > width" << llendl;
		x_end = mWidth;
	}
	if (y_end > mWidth)
	{
		llwarns << "y end > width" << llendl;
		y_end = mWidth;
	}


	///////////////////////////////////////////
	//
	// Generate target texture information, stride ratios.
	//
	//

	LLViewerTexture *texturep;
	U32 tex_width, tex_height, tex_comps;
	U32 tex_stride;
	F32 tex_x_scalef, tex_y_scalef;
	S32 tex_x_begin, tex_y_begin, tex_x_end, tex_y_end;
	F32 tex_x_ratiof, tex_y_ratiof;

	texturep = mSurfacep->getSTexture();
	tex_width = texturep->getWidth();
	tex_height = texturep->getHeight();
	tex_comps = texturep->getComponents();
	tex_stride = tex_width * tex_comps;

	U32 st_comps = 3;
	U32 st_width = BASE_SIZE;
	U32 st_height = BASE_SIZE;
	
	if (tex_comps != st_comps)
	{
		llwarns << "Base texture comps != input texture comps" << llendl;
		return FALSE;
	}

	tex_x_scalef = (F32)tex_width / (F32)mWidth;
	tex_y_scalef = (F32)tex_height / (F32)mWidth;
	tex_x_begin = (S32)((F32)x_begin * tex_x_scalef);
	tex_y_begin = (S32)((F32)y_begin * tex_y_scalef);
	tex_x_end = (S32)((F32)x_end * tex_x_scalef);
	tex_y_end = (S32)((F32)y_end * tex_y_scalef);

	tex_x_ratiof = (F32)mWidth*mScale / (F32)tex_width;
	tex_y_ratiof = (F32)mWidth*mScale / (F32)tex_height;

	LLPointer<LLImageRaw> raw = new LLImageRaw(tex_width, tex_height, tex_comps);
	U8 *rawp = raw->getData();

	F32 tex_width_inv = 1.f/tex_width;
	F32 tex_height_inv = 1.f/tex_height;

	F32 st_x_stride, st_y_stride;
	st_x_stride = ((F32)st_width / (F32)mTexScaleX)*((F32)mWidth / (F32)tex_width);
	st_y_stride = ((F32)st_height / (F32)mTexScaleY)*((F32)mWidth / (F32)tex_height);

	llassert(st_x_stride > 0.f);
	llassert(st_y_stride > 0.f);
	////////////////////////////////
	//
	// Iterate through the target texture, striding through the
	// subtextures and interpolating appropriately.
	//
	//

	F32 sti, stj;
	S32 st_offset;
	sti = (tex_x_begin * st_x_stride) - st_width*(llfloor((tex_x_begin * st_x_stride)/st_width));
	stj = (tex_y_begin * st_y_stride) - st_height*(llfloor((tex_y_begin * st_y_stride)/st_height));

	st_offset = (llfloor(stj * st_width) + llfloor(sti)) * st_comps;
	for (S32 j = tex_y_begin; j < tex_y_end; j++)
	{
		U32 offset = j * tex_stride + tex_x_begin * tex_comps;
		sti = (tex_x_begin * st_x_stride) - st_width*((U32)(tex_x_begin * st_x_stride)/st_width);
		for (S32 i = tex_x_begin; i < tex_x_end; i++)
		{
			S32 tex0, tex1;
			F32 composition = getValueScaled(i*tex_x_ratiof, j*tex_y_ratiof);

			tex0 = llfloor( composition );
			tex0 = llclamp(tex0, 0, 3);
			composition -= tex0;
			tex1 = tex0 + 1;
			tex1 = llclamp(tex1, 0, 3);

			F32 xy_int_i, xy_int_j;

			xy_int_i = i * tex_width_inv;
			xy_int_j = j * tex_height_inv;

			st_offset = (lltrunc(sti) + lltrunc(stj)*st_width) * st_comps;
			for (U32 k = 0; k < tex_comps; k++)
			{
				// Linearly interpolate based on composition.
				if (st_offset >= st_data_size[tex0] || st_offset >= st_data_size[tex1])
				{
					// SJB: This shouldn't be happening, but does... Rounding error?
					//llwarns << "offset 0 [" << tex0 << "] =" << st_offset << " >= size=" << st_data_size[tex0] << llendl;
					//llwarns << "offset 1 [" << tex1 << "] =" << st_offset << " >= size=" << st_data_size[tex1] << llendl;
				}
				else
				{
					F32 a = *(st_data[tex0] + st_offset);
					F32 b = *(st_data[tex1] + st_offset);
					rawp[ offset ] = (U8)lltrunc( a + composition * (b - a) );
				}
				offset++;
				st_offset++;
			}

			sti += st_x_stride;
			if (sti >= st_width)
			{
				sti -= st_width;
			}
		}

		stj += st_y_stride;
		if (stj >= st_height)
		{
			stj -= st_height;
		}
	}

	if (!texturep->hasGLTexture())
	{
		texturep->createGLTexture(0, raw);
	}
	texturep->setSubImage(raw, tex_x_begin, tex_y_begin, tex_x_end - tex_x_begin, tex_y_end - tex_y_begin);
	LLSurface::sTextureUpdateTime += gen_timer.getElapsedTimeF32();
	LLSurface::sTexelsUpdated += (tex_x_end - tex_x_begin) * (tex_y_end - tex_y_begin);

	for (S32 i = 0; i < 4; i++)
	{
		// Un-boost detatil textures (will get re-boosted if rendering in high detail)
		mDetailTextures[i]->setBoostLevel(LLGLTexture::BOOST_NONE);
		mDetailTextures[i]->setMinDiscardLevel(MAX_DISCARD_LEVEL + 1);
	}
	
	return TRUE;
}

LLUUID LLVLComposition::getDetailTextureID(S32 corner)
{
	return mDetailTextures[corner]->getID();
}

LLViewerFetchedTexture* LLVLComposition::getDetailTexture(S32 corner)
{
	return mDetailTextures[corner];
}

F32 LLVLComposition::getStartHeight(S32 corner)
{
	return mStartHeight[corner];
}

void LLVLComposition::setStartHeight(S32 corner, const F32 start_height)
{
	mStartHeight[corner] = start_height;
}

F32 LLVLComposition::getHeightRange(S32 corner)
{
	return mHeightRange[corner];
}

void LLVLComposition::setHeightRange(S32 corner, const F32 range)
{
	mHeightRange[corner] = range;
}