451 lines
12 KiB
C++
451 lines
12 KiB
C++
// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
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// Copyright (C) 2010 Winch Gate Property Limited
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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// lightmap_optimizer
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// ------------------
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// the goal is to regroup lightmap of a level into lightmap with a higher level
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#include "nel/misc/common.h"
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#include "nel/misc/file.h"
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#include "nel/misc/bitmap.h"
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#include "nel/misc/log.h"
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#include "nel/misc/path.h"
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#include "nel/misc/uv.h"
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#include "nel/misc/cmd_args.h"
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#include <vector>
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#include <string>
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// ---------------------------------------------------------------------------
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using namespace std;
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using namespace NLMISC;
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// ***************************************************************************
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void outString(const string &sText)
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{
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printf("%s\n", sText.c_str());
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}
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// ***************************************************************************
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// test every 4 pixels for 2 reason: DXTC and speed
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const uint32 posStep= 4;
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// ***************************************************************************
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// Try all position to put pSrc in pDst
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bool tryAllPos(NLMISC::CBitmap *pSrc, NLMISC::CBitmap *pDst, sint32 &x, sint32 &y)
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{
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uint32 i, j;
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CObjectVector<uint8> &rSrcPix = pSrc->getPixels();
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CObjectVector<uint8> &rDstPix = pDst->getPixels();
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// Recalculate real size of the source (without padding to power of 2)
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uint32 nSrcWidth = pSrc->getWidth(), nSrcHeight = pSrc->getHeight();
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if (nSrcWidth > pDst->getWidth() ) return false;
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if (nSrcHeight > pDst->getHeight() ) return false;
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// For all position test if the Src plane can be put in
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for (j = 0; j <= (pDst->getHeight() - nSrcHeight); j+= posStep)
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for (i = 0; i <= (pDst->getWidth() - nSrcWidth); i+= posStep)
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{
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x = i; y = j;
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uint32 a, b;
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bool bCanPut = true;
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for (b = 0; b < nSrcHeight; ++b)
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{
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for (a = 0; a < nSrcWidth; ++a)
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{
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if (rDstPix[4*((x+a)+(y+b)*pDst->getWidth())+3] != 0)
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{
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bCanPut = false;
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break;
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}
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}
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if (bCanPut == false)
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break;
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}
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if (bCanPut)
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return true;
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}
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return false;
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}
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// ***************************************************************************
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void putPixel(uint8 *dst, uint8 *src, bool alphaTransfert)
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{
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dst[0] = src[0];
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dst[1] = src[1];
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dst[2] = src[2];
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if (alphaTransfert)
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dst[3] = src[3];
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else
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dst[3] = 255;
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}
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// ***************************************************************************
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bool putIn(NLMISC::CBitmap *pSrc, NLMISC::CBitmap *pDst, sint32 x, sint32 y, bool alphaTransfert=true)
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{
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uint8 *rSrcPix = &pSrc->getPixels()[0];
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uint8 *rDstPix = &pDst->getPixels()[0];
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uint wSrc= pSrc->getWidth();
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uint hSrc= pSrc->getHeight();
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for (uint b = 0; b < hSrc; ++b)
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for (uint a = 0; a < wSrc; ++a)
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{
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if (rDstPix[4*((x+a)+(y+b)*pDst->getWidth())+3] != 0)
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return false;
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// write
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putPixel(rDstPix + 4*((x+a)+(y+b)*pDst->getWidth()), rSrcPix+ 4*(a+b*pSrc->getWidth()), alphaTransfert);
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}
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// DXTC compression optim: fill last column block and last row block of 4 pixels with block color (don't let black or undefined)
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uint wSrc4= 4*((wSrc+3)/4);
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uint hSrc4= 4*((hSrc+3)/4);
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// expand on W
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if(wSrc<wSrc4)
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{
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for(uint a=wSrc;a<wSrc4;a++)
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{
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for(uint b=0;b<hSrc4;b++)
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{
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putPixel(rDstPix + 4*((x+a)+(y+b)*pDst->getWidth()), rDstPix + 4*((x+wSrc-1)+(y+b)*pDst->getWidth()), alphaTransfert);
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}
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}
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}
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// expand on H
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if(hSrc<hSrc4)
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{
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for(uint b=hSrc;b<hSrc4;b++)
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{
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for(uint a=0;a<wSrc4;a++)
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{
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putPixel(rDstPix + 4*((x+a)+(y+b)*pDst->getWidth()), rDstPix + 4*((x+a)+(y+hSrc-1)*pDst->getWidth()), alphaTransfert);
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}
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}
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}
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return true;
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}
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// ***************************************************************************
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string getBaseName(const string &fullname)
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{
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string basename;
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string::size_type pos = fullname.rfind('_');
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if (pos != string::npos) basename = fullname.substr(0, pos+1);
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return basename;
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}
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// ***************************************************************************
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// resize the bitmap to the next power of 2 and preserve content
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void enlargeCanvas(NLMISC::CBitmap &b)
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{
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sint32 nNewWidth = b.getWidth(), nNewHeight = b.getHeight();
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if (nNewWidth > nNewHeight)
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nNewHeight *= 2;
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else
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nNewWidth *= 2;
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NLMISC::CBitmap b2;
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b2.resize (nNewWidth, nNewHeight, NLMISC::CBitmap::RGBA);
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CObjectVector<uint8> &rPixelBitmap = b2.getPixels(0);
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for (sint32 i = 0; i < nNewWidth*nNewHeight*4; ++i)
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rPixelBitmap[i] = 0;
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putIn (&b, &b2, 0, 0);
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b = b2;
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}
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bool writeFileDependingOnFilename(const std::string &filename, CBitmap &bitmap)
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{
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NLMISC::COFile out;
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if (out.open(filename))
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{
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if (toLower(filename).find(".png") != string::npos)
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{
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bitmap.writePNG(out, 32);
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}
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else
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{
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bitmap.writeTGA(out, 32);
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}
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out.close();
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return true;
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}
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return false;
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}
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// ***************************************************************************
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// main
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// ***************************************************************************
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int main(int argc, char **argv)
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{
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CApplicationContext applicationContext;
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// Parse Command Line.
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NLMISC::CCmdArgs args;
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args.setDescription("Build a huge interface texture from several small elements to optimize video memory usage.");
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args.addArg("s", "subset", "existing_uv_txt_name", "Build a subset of an existing interface definition while preserving the existing texture ids, to support freeing up VRAM by switching to the subset without rebuilding the entire interface.");
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args.addAdditionalArg("output_filename", "PNG or TGA file to generate", true);
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args.addAdditionalArg("input_path", "Path that containts interfaces elements", false);
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if (!args.parse(argc, argv)) return 1;
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// build as a subset of existing interface
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bool buildSubset = false;
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string existingUVfilename;
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if (args.haveArg("s"))
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{
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buildSubset = true;
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existingUVfilename = args.getArg("s").front();
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}
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std::vector<std::string> inputDirs = args.getAdditionalArg("input_path");
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string fmtName = args.getAdditionalArg("output_filename").front();
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// append PNG extension if no one provided
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if (fmtName.rfind('.') == string::npos) fmtName += ".png";
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vector<string> AllMapNames;
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vector<string>::iterator it = inputDirs.begin(), itEnd = inputDirs.end();
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while( it != itEnd )
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{
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string sDir = *it++;
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if( !CFile::isDirectory(sDir) )
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{
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outString(toString("ERROR: directory %s does not exist", sDir.c_str()));
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return -1;
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}
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CPath::getPathContent(sDir, false, false, true, AllMapNames);
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}
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vector<NLMISC::CBitmap*> AllMaps;
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sint32 j;
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// Load all maps
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sint32 mapSize = (sint32)AllMapNames.size();
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AllMaps.resize( mapSize );
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for(sint i = 0; i < mapSize; ++i )
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{
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NLMISC::CBitmap *pBtmp = NULL;
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try
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{
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pBtmp = new NLMISC::CBitmap;
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NLMISC::CIFile inFile;
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if (!inFile.open(AllMapNames[i])) throw NLMISC::Exception(toString("Unable to open %s", AllMapNames[i].c_str()));
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uint8 colors = pBtmp->load(inFile);
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if (!colors) throw NLMISC::Exception(toString("%s is not a bitmap", AllMapNames[i].c_str()));
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if (pBtmp->getPixelFormat() != CBitmap::RGBA)
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{
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outString(toString("Converting %s to RGBA (32 bits), originally using %u bits...", AllMapNames[i].c_str(), (uint)colors));
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pBtmp->convertToType(CBitmap::RGBA);
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}
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AllMaps[i] = pBtmp;
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}
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catch (const NLMISC::Exception &e)
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{
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if (pBtmp) delete pBtmp;
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outString(toString("ERROR : %s", e.what()));
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return -1;
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}
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}
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// Sort all maps by decreasing size
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for (sint i = 0; i < mapSize-1; ++i)
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for (j = i+1; j < mapSize; ++j)
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{
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NLMISC::CBitmap *pBI = AllMaps[i];
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NLMISC::CBitmap *pBJ = AllMaps[j];
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if ((pBI->getWidth()*pBI->getHeight()) < (pBJ->getWidth()*pBJ->getHeight()))
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{
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NLMISC::CBitmap *pBTmp = AllMaps[i];
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AllMaps[i] = AllMaps[j];
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AllMaps[j] = pBTmp;
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string sTmp = AllMapNames[i];
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AllMapNames[i] = AllMapNames[j];
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AllMapNames[j] = sTmp;
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}
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}
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// Place all maps into the global texture
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NLMISC::CBitmap GlobalTexture, GlobalMask;
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GlobalTexture.resize (1, 1, NLMISC::CBitmap::RGBA);
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GlobalMask.resize (1, 1, NLMISC::CBitmap::RGBA);
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CObjectVector<uint8> &rPixelBitmap = GlobalTexture.getPixels(0);
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rPixelBitmap[0] = rPixelBitmap[1] = rPixelBitmap[2] = rPixelBitmap[3] = 0;
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CObjectVector<uint8> &rPixelMask = GlobalMask.getPixels(0);
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rPixelMask[0] = rPixelMask[1] = rPixelMask[2] = rPixelMask[3] = 0;
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vector<NLMISC::CUV> UVMin, UVMax;
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UVMin.resize (mapSize, NLMISC::CUV(0.0f, 0.0f));
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UVMax.resize (mapSize, NLMISC::CUV(0.0f, 0.0f));
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for (sint i = 0; i < mapSize; ++i)
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{
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sint32 x, y;
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while (!tryAllPos(AllMaps[i], &GlobalMask, x, y))
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{
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// Enlarge global texture
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enlargeCanvas (GlobalTexture);
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enlargeCanvas (GlobalMask);
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}
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putIn (AllMaps[i], &GlobalTexture, x, y);
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putIn (AllMaps[i], &GlobalMask, x, y, false);
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UVMin[i].U = (float)x;
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UVMin[i].V = (float)y;
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UVMax[i].U = (float)x+AllMaps[i]->getWidth();
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UVMax[i].V = (float)y+AllMaps[i]->getHeight();
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#if 0
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// Do not remove this is useful for debugging
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writeFileDependingOnFilename(fmtName.substr(0, fmtName.rfind('.')) + "_txt.png", GlobalTexture);
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writeFileDependingOnFilename(fmtName.substr(0, fmtName.rfind('.')) + "_msk.png", GlobalMask);
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#endif
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}
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// Convert UV from pixel to ratio
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for (sint i = 0; i < mapSize; ++i)
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{
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UVMin[i].U = UVMin[i].U / (float)GlobalTexture.getWidth();
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UVMin[i].V = UVMin[i].V / (float)GlobalTexture.getHeight();
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UVMax[i].U = UVMax[i].U / (float)GlobalTexture.getWidth();
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UVMax[i].V = UVMax[i].V / (float)GlobalTexture.getHeight();
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}
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// Write global texture file
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if (writeFileDependingOnFilename(fmtName, GlobalTexture))
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{
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outString(toString("Writing %s", fmtName.c_str()));
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}
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else
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{
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outString(toString("ERROR: Unable to write %s", fmtName.c_str()));
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}
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// Write UV text file
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if( !buildSubset )
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{
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fmtName = fmtName.substr(0, fmtName.rfind('.'));
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fmtName += ".txt";
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FILE *f = nlfopen(fmtName, "wt");
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if (f != NULL)
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{
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for (sint i = 0; i < mapSize; ++i)
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{
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// get the string whitout path
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string fileName = CFile::getFilename(AllMapNames[i]);
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fprintf (f, "%s %.12f %.12f %.12f %.12f\n", fileName.c_str(), UVMin[i].U, UVMin[i].V, UVMax[i].U, UVMax[i].V);
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}
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fclose (f);
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outString(toString("Writing UV file %s", fmtName.c_str()));
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}
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else
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{
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outString(toString("ERROR: Cannot write UV file %s", fmtName.c_str()));
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}
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}
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else // build as a subset
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{
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// Load existing uv file
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CIFile iFile;
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string filename = CPath::lookup (existingUVfilename, false);
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if( filename.empty() || !iFile.open(filename) )
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{
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outString(toString("ERROR: Unable to open %s", existingUVfilename.c_str()));
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return -1;
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}
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// Write subset UV text file
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fmtName = fmtName.substr(0, fmtName.rfind('.'));
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fmtName += ".txt";
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FILE *f = nlfopen(fmtName, "wt");
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if (f == NULL)
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{
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outString(toString("ERROR: Unable to write UV file %s", fmtName.c_str()));
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return -1;
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}
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char bufTmp[256], tgaName[256];
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string sTGAname;
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float uvMinU, uvMinV, uvMaxU, uvMaxV;
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while (!iFile.eof())
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{
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iFile.getline (bufTmp, 256);
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if (sscanf (bufTmp, "%s %f %f %f %f", tgaName, &uvMinU, &uvMinV, &uvMaxU, &uvMaxV) != 5)
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{
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nlwarning("Can't parse %s", bufTmp);
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continue;
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}
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sint i;
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sTGAname = toLower(string(tgaName));
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string findTGAName;
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for (i = 0; i < mapSize; ++i)
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{
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// get the string whitout path
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findTGAName = toLower(CFile::getFilename(AllMapNames[i]));
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if( findTGAName == sTGAname )
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break;
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}
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if( i == mapSize )
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{
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// not present in subset: offset existing uv's to (0,0), preserving size
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fprintf (f, "%s %.12f %.12f %.12f %.12f\n", sTGAname.c_str(), 0.0f, 0.0f, uvMaxU - uvMinU, uvMaxV - uvMinV);
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}
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else
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{
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// present in subset: use new uv's
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fprintf (f, "%s %.12f %.12f %.12f %.12f\n", sTGAname.c_str(), UVMin[i].U, UVMin[i].V,
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UVMax[i].U, UVMax[i].V);
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}
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}
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fclose (f);
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outString(toString("Writing UV file: %s", fmtName.c_str()));
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}
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return 0;
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}
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