/** * @file lltextureatlas.cpp * @brief LLTextureAtlas class implementation. * * $LicenseInfo:firstyear=2002&license=viewerlgpl$ * 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 "linden_common.h" #include "llerror.h" #include "llimage.h" #include "llmath.h" #include "llgl.h" #include "llrender.h" #include "lltextureatlas.h" //------------------- S16 LLTextureAtlas::sMaxSubTextureSize = 64 ; S16 LLTextureAtlas::sSlotSize = 32 ; #ifndef DEBUG_ATLAS #define DEBUG_ATLAS 0 #endif #ifndef DEBUG_USAGE_BITS #define DEBUG_USAGE_BITS 0 #endif //************************************************************************************************************** LLTextureAtlas::LLTextureAtlas(U8 ncomponents, S16 atlas_dim) : LLViewerTexture(atlas_dim * sSlotSize, atlas_dim * sSlotSize, ncomponents, TRUE), mAtlasDim(atlas_dim), mNumSlotsReserved(0), mMaxSlotsInAtlas(atlas_dim * atlas_dim) { generateEmptyUsageBits() ; //generate an empty texture generateGLTexture() ; LLPointer<LLImageRaw> image_raw = new LLImageRaw(mFullWidth, mFullHeight, mComponents); createGLTexture(0, image_raw, 0); image_raw = NULL; } LLTextureAtlas::~LLTextureAtlas() { if(mSpatialGroupList.size() > 0) { llerrs << "Not clean up the spatial groups!" << llendl ; } releaseUsageBits() ; } //virtual S8 LLTextureAtlas::getType() const { return LLViewerTexture::ATLAS_TEXTURE ; } void LLTextureAtlas::getTexCoordOffset(S16 col, S16 row, F32& xoffset, F32& yoffset) { xoffset = (F32)col / mAtlasDim ; yoffset = (F32)row / mAtlasDim ; } void LLTextureAtlas::getTexCoordScale(S32 w, S32 h, F32& xscale, F32& yscale) { xscale = (F32)w / (mAtlasDim * sSlotSize) ; yscale = (F32)h / (mAtlasDim * sSlotSize) ; } //insert a texture piece into the atlas LLGLuint LLTextureAtlas::insertSubTexture(LLImageGL* source_gl_tex, S32 discard_level, const LLImageRaw* raw_image, S16 slot_col, S16 slot_row) { if(!getTexName()) { return 0 ; } S32 w = raw_image->getWidth() ; S32 h = raw_image->getHeight() ; if(w < 8 || w > sMaxSubTextureSize || h < 8 || h > sMaxSubTextureSize) { //size overflow return 0 ; } BOOL res = gGL.getTexUnit(0)->bindManual(LLTexUnit::TT_TEXTURE, getTexName()); if (!res) { llerrs << "bindTexture failed" << llendl; } GLint xoffset = sSlotSize * slot_col ; GLint yoffset = sSlotSize * slot_row ; if(!source_gl_tex->preAddToAtlas(discard_level, raw_image)) { return 0 ; } glTexSubImage2D(GL_TEXTURE_2D, 0, xoffset, yoffset, w, h, mGLTexturep->getPrimaryFormat(), mGLTexturep->getFormatType(), raw_image->getData()); source_gl_tex->postAddToAtlas() ; return getTexName(); } //release a sub-texture slot from the atlas void LLTextureAtlas::releaseSlot(S16 slot_col, S16 slot_row, S8 slot_width) { unmarkUsageBits(slot_width, slot_col, slot_row) ; mNumSlotsReserved -= slot_width * slot_width ; } BOOL LLTextureAtlas::isEmpty() const { return !mNumSlotsReserved ; } BOOL LLTextureAtlas::isFull(S8 to_be_reserved) const { return mNumSlotsReserved + to_be_reserved > mMaxSlotsInAtlas ; } F32 LLTextureAtlas::getFullness() const { return (F32)mNumSlotsReserved / mMaxSlotsInAtlas ; } void LLTextureAtlas::addSpatialGroup(LLSpatialGroup* groupp) { if(groupp && !hasSpatialGroup(groupp)) { mSpatialGroupList.push_back(groupp); } } void LLTextureAtlas::removeSpatialGroup(LLSpatialGroup* groupp) { if(groupp) { mSpatialGroupList.remove(groupp); } } void LLTextureAtlas::clearSpatialGroup() { mSpatialGroupList.clear(); } void LLTextureAtlas::removeLastSpatialGroup() { mSpatialGroupList.pop_back() ; } LLSpatialGroup* LLTextureAtlas::getLastSpatialGroup() { if(mSpatialGroupList.size() > 0) { return mSpatialGroupList.back() ; } return NULL ; } BOOL LLTextureAtlas::hasSpatialGroup(LLSpatialGroup* groupp) { for(std::list<LLSpatialGroup*>::iterator iter = mSpatialGroupList.begin(); iter != mSpatialGroupList.end() ; ++iter) { if(*iter == groupp) { return TRUE ; } } return FALSE ; } //-------------------------------------------------------------------------------------- //private void LLTextureAtlas::generateEmptyUsageBits() { S32 col_len = (mAtlasDim + 7) >> 3 ; mUsageBits = new U8*[mAtlasDim] ; *mUsageBits = new U8[mAtlasDim * col_len] ; mUsageBits[0] = *mUsageBits ; for(S32 i = 1 ; i < mAtlasDim ; i++) { mUsageBits[i] = mUsageBits[i-1] + col_len ; for(S32 j = 0 ; j < col_len ; j++) { //init by 0 for all bits. mUsageBits[i][j] = 0 ; } } //do not forget mUsageBits[0]! for(S32 j = 0 ; j < col_len ; j++) { //init by 0 for all bits. mUsageBits[0][j] = 0 ; } mTestBits = NULL ; #if DEBUG_USAGE_BITS //------------ //test mTestBits = new U8*[mAtlasDim] ; *mTestBits = new U8[mAtlasDim * mAtlasDim] ; mTestBits[0] = *mTestBits ; for(S32 i = 1 ; i < mAtlasDim ; i++) { mTestBits[i] = mTestBits[i-1] + mAtlasDim ; for(S32 j = 0 ; j < mAtlasDim ; j++) { //init by 0 for all bits. mTestBits[i][j] = 0 ; } } for(S32 j = 0 ; j < mAtlasDim ; j++) { //init by 0 for all bits. mTestBits[0][j] = 0 ; } #endif } void LLTextureAtlas::releaseUsageBits() { if(mUsageBits) { delete[] *mUsageBits ; delete[] mUsageBits ; } mUsageBits = NULL ; //test if( mTestBits) { delete[] *mTestBits; delete[] mTestBits; } mTestBits = NULL ; } void LLTextureAtlas::markUsageBits(S8 bits_len, U8 mask, S16 col, S16 row) { S16 x = col >> 3 ; for(S8 i = 0 ; i < bits_len ; i++) { mUsageBits[row + i][x] |= mask ; } #if DEBUG_USAGE_BITS //test for(S8 i = row ; i < row + bits_len ; i++) { for(S8 j = col ; j < col + bits_len ; j++) { mTestBits[i][j] = 1 ; } } #endif } void LLTextureAtlas::unmarkUsageBits(S8 bits_len, S16 col, S16 row) { S16 x = col >> 3 ; U8 mask = 1 ; for(S8 i = 1 ; i < bits_len ; i++) { mask |= (1 << i) ; } mask <<= (col & 7) ; mask = ~mask ; for(S8 i = 0 ; i < bits_len ; i++) { mUsageBits[row + i][x] &= mask ; } #if DEBUG_USAGE_BITS //test for(S8 i = row ; i < row + bits_len ; i++) { for(S8 j = col ; j < col + bits_len ; j++) { mTestBits[i][j] = 0 ; } } #endif } //return true if any of bits in the range marked. BOOL LLTextureAtlas::areUsageBitsMarked(S8 bits_len, U8 mask, S16 col, S16 row) { BOOL ret = FALSE ; S16 x = col >> 3 ; for(S8 i = 0 ; i < bits_len ; i++) { if(mUsageBits[row + i][x] & mask) { ret = TRUE ; break ; //return TRUE ; } } #if DEBUG_USAGE_BITS //test BOOL ret2 = FALSE ; for(S8 i = row ; i < row + bits_len ; i++) { for(S8 j = col ; j < col + bits_len ; j++) { if(mTestBits[i][j]) { ret2 = TRUE ; } } } if(ret != ret2) { llerrs << "bits map corrupted." << llendl ; } #endif return ret ;//FALSE ; } //---------------------------------------------------------------------- // //index order: Z order, i.e.: // |-----|-----|-----|-----| // | 10 | 11 | 14 | 15 | // |-----|-----|-----|-----| // | 8 | 9 | 12 | 13 | // |-----|-----|-----|-----| // | 2 | 3 | 6 | 7 | // |-----|-----|-----|-----| // | 0 | 1 | 4 | 5 | // |-----|-----|-----|-----| void LLTextureAtlas::getPositionFromIndex(S16 index, S16& col, S16& row) { col = 0 ; row = 0 ; S16 index_copy = index ; for(S16 i = 0 ; index_copy && i < 16 ; i += 2) { col |= ((index & (1 << i)) >> i) << (i >> 1) ; row |= ((index & (1 << (i + 1))) >> (i + 1)) << (i >> 1) ; index_copy >>= 2 ; } } void LLTextureAtlas::getIndexFromPosition(S16 col, S16 row, S16& index) { index = 0 ; S16 col_copy = col ; S16 row_copy = row ; for(S16 i = 0 ; (col_copy || row_copy) && i < 16 ; i++) { index |= ((col & 1 << i) << i) | ((row & 1 << i) << ( i + 1)) ; col_copy >>= 1 ; row_copy >>= 1 ; } } //---------------------------------------------------------------------- //return TRUE if succeeds. BOOL LLTextureAtlas::getNextAvailableSlot(S8 bits_len, S16& col, S16& row) { S16 index_step = bits_len * bits_len ; U8 mask = 1 ; for(S8 i = 1 ; i < bits_len ; i++) { mask |= (1 << i) ; } U8 cur_mask ; for(S16 index = 0 ; index < mMaxSlotsInAtlas ; index += index_step) { getPositionFromIndex(index, col, row) ; cur_mask = mask << (col & 7) ; if(!areUsageBitsMarked(bits_len, cur_mask, col, row)) { markUsageBits(bits_len, cur_mask, col, row) ; mNumSlotsReserved += bits_len * bits_len ; return TRUE ; } } return FALSE ; }