/** * @file llvlcomposition.cpp * @brief Viewer-side representation of a composition layer... * * $LicenseInfo:firstyear=2001&license=viewergpl$ * * Copyright (c) 2001-2008, Linden Research, Inc. * * Second Life Viewer Source Code * The source code in this file ("Source Code") is provided by Linden Lab * to you under the terms of the GNU General Public License, version 2.0 * ("GPL"), unless you have obtained a separate licensing agreement * ("Other License"), formally executed by you and Linden Lab. Terms of * the GPL can be found in doc/GPL-license.txt in this distribution, or * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2 * * There are special exceptions to the terms and conditions of the GPL as * it is applied to this Source Code. View the full text of the exception * in the file doc/FLOSS-exception.txt in this software distribution, or * online at http://secondlifegrid.net/programs/open_source/licensing/flossexception * * By copying, modifying or distributing this software, you acknowledge * that you have read and understood your obligations described above, * and agree to abide by those obligations. * * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, * COMPLETENESS OR PERFORMANCE. * $/LicenseInfo$ */ #include "llviewerprecompiledheaders.h" #include "llvlcomposition.h" #include "imageids.h" #include "llerror.h" #include "v3math.h" #include "llsurface.h" #include "lltextureview.h" #include "llviewerimage.h" #include "llviewerimagelist.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] = gImageList.getImage(id); 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 S32 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(LLViewerImage::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]->getWidth(0); S32 height = mDetailTextures[i]->getHeight(0); 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(LLViewerImage::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 mRawImages[i] = new LLImageRaw; S32 min_dim = llmin(mDetailTextures[i]->getWidth(0), mDetailTextures[i]->getHeight(0)); S32 ddiscard = 0; while (min_dim > BASE_SIZE && ddiscard < MAX_DISCARD_LEVEL) { ddiscard++; min_dim /= 2; } if (!mDetailTextures[i]->readBackRaw(ddiscard, mRawImages[i], false)) { llwarns << "Unable to read raw data for terrain detail texture: " << mDetailTextures[i]->getID() << llendl; mRawImages[i] = NULL; return FALSE; } if (mDetailTextures[i]->getWidth(ddiscard) != BASE_SIZE || mDetailTextures[i]->getHeight(ddiscard) != BASE_SIZE || mDetailTextures[i]->getComponents() != 3) { LLPointer 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. // // LLViewerImage *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; S32 st_comps = 3; S32 st_width = BASE_SIZE; S32 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 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; } } 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(LLViewerImage::BOOST_NONE); mDetailTextures[i]->setMinDiscardLevel(MAX_DISCARD_LEVEL + 1); } return TRUE; } LLUUID LLVLComposition::getDetailTextureID(S32 corner) { return mDetailTextures[corner]->getID(); } LLViewerImage* 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; }