mirror of
https://github.com/vcmi/vcmi.git
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161 lines
4.0 KiB
C++
161 lines
4.0 KiB
C++
/*
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* BitmapHandler.cpp, part of VCMI engine
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*
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* Authors: listed in file AUTHORS in main folder
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*
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* License: GNU General Public License v2.0 or later
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* Full text of license available in license.txt file, in main folder
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*
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*/
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//code is copied from vcmiclient/CBitmapHandler.cpp with minimal changes
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#include "StdInc.h"
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#include "BitmapHandler.h"
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#include "../lib/filesystem/Filesystem.h"
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#include <QBitmap>
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#include <QImage>
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#include <QPixmap>
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namespace BitmapHandler
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{
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QImage loadH3PCX(ui8 * data, size_t size);
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QImage loadBitmapFromDir(const std::string & path, const std::string & fname, bool setKey=true);
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bool isPCX(const ui8 * header)//check whether file can be PCX according to header
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{
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ui32 fSize = read_le_u32(header + 0);
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ui32 width = read_le_u32(header + 4);
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ui32 height = read_le_u32(header + 8);
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return fSize == width * height || fSize == width * height * 3;
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}
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enum Epcxformat
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{
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PCX8B,
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PCX24B
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};
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QImage loadH3PCX(ui8 * pcx, size_t size)
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{
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//SDL_Surface * ret;
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Epcxformat format;
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int it = 0;
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ui32 fSize = read_le_u32(pcx + it); it += 4;
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ui32 width = read_le_u32(pcx + it); it += 4;
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ui32 height = read_le_u32(pcx + it); it += 4;
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if(fSize==width*height*3)
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format=PCX24B;
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else if(fSize==width*height)
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format=PCX8B;
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else
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return QImage();
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QSize qsize(width, height);
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if(format==PCX8B)
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{
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it = 0xC;
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//auto bitmap = QBitmap::fromData(qsize, pcx + it);
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QImage image(pcx + it, width, height, QImage::Format_Indexed8);
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//palette - last 256*3 bytes
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QVector<QRgb> colorTable;
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it = (int)size - 256 * 3;
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for(int i = 0; i < 256; i++)
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{
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char bytes[3];
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bytes[0] = pcx[it++];
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bytes[1] = pcx[it++];
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bytes[2] = pcx[it++];
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colorTable.append(qRgb(bytes[0], bytes[1], bytes[2]));
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}
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image.setColorTable(colorTable);
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return image;
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}
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else
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{
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QImage image(pcx + it, width, height, QImage::Format_RGB32);
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return image;
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}
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}
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QImage loadBitmapFromDir(const std::string & path, const std::string & fname, bool setKey)
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{
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if(!fname.size())
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{
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logGlobal->warn("Call to loadBitmap with void fname!");
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return QImage();
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}
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if(!CResourceHandler::get()->existsResource(ResourceID(path + fname, EResType::IMAGE)))
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{
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return QImage();
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}
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auto fullpath = CResourceHandler::get()->getResourceName(ResourceID(path + fname, EResType::IMAGE));
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auto readFile = CResourceHandler::get()->load(ResourceID(path + fname, EResType::IMAGE))->readAll();
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if(isPCX(readFile.first.get()))
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{//H3-style PCX
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auto image = BitmapHandler::loadH3PCX(readFile.first.get(), readFile.second);
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if(!image.isNull())
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{
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if(image.bitPlaneCount() == 1 && setKey)
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{
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QVector<QRgb> colorTable = image.colorTable();
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colorTable[0] = qRgba(255, 255, 255, 0);
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image.setColorTable(colorTable);
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}
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}
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else
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{
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logGlobal->error("Failed to open %s as H3 PCX!", fname);
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}
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return image;
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}
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else
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{ //loading via QImage
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QImage image(QString::fromStdString(fullpath->make_preferred().string()));
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if(!image.isNull())
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{
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if(image.bitPlaneCount() == 1)
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{
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//set correct value for alpha\unused channel
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QVector<QRgb> colorTable = image.colorTable();
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for(auto & c : colorTable)
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c = qRgb(qRed(c), qGreen(c), qBlue(c));
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image.setColorTable(colorTable);
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}
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}
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else
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{
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logGlobal->error("Failed to open %s via QImage", fname);
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return image;
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}
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}
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return QImage();
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// When modifying anything here please check use cases:
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// 1) Vampire mansion in Necropolis (not 1st color is transparent)
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// 2) Battle background when fighting on grass/dirt, topmost sky part (NO transparent color)
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// 3) New objects that may use 24-bit images for icons (e.g. witchking arts)
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}
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QImage loadBitmap(const std::string & fname, bool setKey)
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{
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for(const auto dir : {"DATA/", "SPRITES/"})
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{
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auto image = loadBitmapFromDir(dir, fname, setKey);
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if(!image.isNull())
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return image;
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}
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logGlobal->error("Error: Failed to find file %s", fname);
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return {};
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}
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}
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