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vcmi/mapeditor/BitmapHandler.cpp
2022-09-06 21:15:13 +04:00

170 lines
4.0 KiB
C++

//
// BitmapHandler.cpp
// vcmieditor
//
// Created by nordsoft on 29.08.2022.
//
#include "StdInc.h"
#include "BitmapHandler.h"
#include "../lib/filesystem/Filesystem.h"
#include <QBitmap>
#include <QImage>
#include <QPixmap>
namespace BitmapHandler
{
QImage loadH3PCX(ui8 * data, size_t size);
QImage loadBitmapFromDir(std::string path, std::string fname, bool setKey=true);
bool isPCX(const ui8 *header)//check whether file can be PCX according to header
{
ui32 fSize = read_le_u32(header + 0);
ui32 width = read_le_u32(header + 4);
ui32 height = read_le_u32(header + 8);
return fSize == width*height || fSize == width*height*3;
}
enum Epcxformat
{
PCX8B,
PCX24B
};
QImage loadH3PCX(ui8 * pcx, size_t size)
{
//SDL_Surface * ret;
Epcxformat format;
int it=0;
ui32 fSize = read_le_u32(pcx + it); it+=4;
ui32 width = read_le_u32(pcx + it); it+=4;
ui32 height = read_le_u32(pcx + it); it+=4;
if (fSize==width*height*3)
format=PCX24B;
else if (fSize==width*height)
format=PCX8B;
else
return QImage();
QSize qsize(width, height);
if (format==PCX8B)
{
it = 0xC;
//auto bitmap = QBitmap::fromData(qsize, pcx + it);
QImage image(pcx + it, width, height, QImage::Format_Indexed8);
//palette - last 256*3 bytes
QVector<QRgb> colorTable;
it = (int)size-256*3;
for (int i=0;i<256;i++)
{
char bytes[3];
bytes[0] = pcx[it++];
bytes[1] = pcx[it++];
bytes[2] = pcx[it++];
colorTable.append(qRgb(bytes[0], bytes[1], bytes[2]));
}
image.setColorTable(colorTable);
return image;
}
else
{
QImage image(pcx + it, width, height, QImage::Format_RGB32);
return image;
}
}
QImage loadBitmapFromDir(std::string path, std::string fname, bool setKey)
{
if(!fname.size())
{
logGlobal->warn("Call to loadBitmap with void fname!");
return QImage();
}
if (!CResourceHandler::get()->existsResource(ResourceID(path + fname, EResType::IMAGE)))
{
return QImage();
}
auto fullpath = CResourceHandler::get()->getResourceName(ResourceID(path + fname, EResType::IMAGE));
auto readFile = CResourceHandler::get()->load(ResourceID(path + fname, EResType::IMAGE))->readAll();
if (isPCX(readFile.first.get()))
{//H3-style PCX
auto image = BitmapHandler::loadH3PCX(readFile.first.get(), readFile.second);
if(!image.isNull())
{
if(image.bitPlaneCount() == 1 && setKey)
{
QVector<QRgb> colorTable = image.colorTable();
colorTable[0] = qRgba(255, 255, 255, 0);
image.setColorTable(colorTable);
}
}
else
{
logGlobal->error("Failed to open %s as H3 PCX!", fname);
}
return image;
}
else
{ //loading via SDL_Image
QImage image(QString::fromStdString(fullpath->make_preferred().string()));
if(!image.isNull())
{
if(image.bitPlaneCount() == 1)
{
//set correct value for alpha\unused channel
QVector<QRgb> colorTable = image.colorTable();
for(auto & c : colorTable)
c = qRgb(qRed(c), qGreen(c), qBlue(c));
image.setColorTable(colorTable);
}
}
else
{
logGlobal->error("Failed to open %s via QImage", fname);
return image;
}
}
return QImage();
// When modifying anything here please check two use cases:
// 1) Vampire mansion in Necropolis (not 1st color is transparent)
// 2) Battle background when fighting on grass/dirt, topmost sky part (NO transparent color)
// 3) New objects that may use 24-bit images for icons (e.g. witchking arts)
/*if (ret->format->palette)
{
CSDL_Ext::setDefaultColorKeyPresize(ret);
}
else if (ret->format->Amask)
{
SDL_SetSurfaceBlendMode(ret, SDL_BLENDMODE_BLEND);
}
else // always set
{
CSDL_Ext::setDefaultColorKey(ret);
}
return ret;*/
}
QImage loadBitmap(std::string fname, bool setKey)
{
QImage image = loadBitmapFromDir("DATA/", fname, setKey);
if(image.isNull())
{
image = loadBitmapFromDir("SPRITES/", fname, setKey);
if(image.isNull())
{
logGlobal->error("Error: Failed to find file %s", fname);
}
}
return image;
}
}