SWBF2-Classic-Msh-Viewer/QtMeshViewer/Header/tga.h

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#pragma once
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#include "OutputDevice.h"
#include <QImage>
#include <QColor>
#include <QVector>
#include <QFile>
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QImage loadTga(QString filePath, bool &success)
{
QImage img;
success = true;
// open the file
QFile file(filePath);
if (!file.open(QIODevice::ReadOnly))
{
success = false;
}
else
{
// read in the header
quint8 ui8x18Header[19] = { 0 };
file.read(reinterpret_cast<char*>(&ui8x18Header), sizeof(ui8x18Header) - 1);
//get variables
quint32 ui32BpP;
quint32 ui32Width;
quint32 ui32Height;
quint32 ui32IDLength;
quint32 ui32PicType;
quint32 ui32PaletteLength;
quint32 ui32Size;
// extract all information from header
ui32IDLength = ui8x18Header[0];
ui32PicType = ui8x18Header[2];
ui32PaletteLength = ui8x18Header[6] * 0x100 + ui8x18Header[5];
ui32Width = ui8x18Header[13] * 0x100 + ui8x18Header[12];
ui32Height = ui8x18Header[15] * 0x100 + ui8x18Header[14];
ui32BpP = ui8x18Header[16];
// calculate some more information
ui32Size = ui32Width * ui32Height * ui32BpP / 8;
// jump to the data block
file.seek(ui32IDLength + ui32PaletteLength + 18);
// uncompressed
if (ui32PicType == 2 && (ui32BpP == 24 || ui32BpP == 32))
{
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img = QImage(ui32Width, ui32Height, ui32BpP == 32 ? QImage::Format_RGBA8888 : QImage::Format_RGB888);
int lineWidth = ui32Width * ui32BpP / 8;
for (int i = ui32Height - 1; i >= 0; --i)
file.read(reinterpret_cast<char*>(img.scanLine(i)), lineWidth);
}
// else if compressed 24 or 32 bit
else if (ui32PicType == 10 && (ui32BpP == 24 || ui32BpP == 32)) // compressed
{
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OutputDevice::getInstance()->print("compressed tga is not supported by SWBF", 1);
img = QImage(ui32Width, ui32Height, QImage::Format_RGBA8888);
quint8 tempChunkHeader;
quint8 tempData[5];
unsigned int tmp_pixelIndex = 0;
do {
file.read(reinterpret_cast<char*>(&tempChunkHeader), sizeof(tempChunkHeader));
if (tempChunkHeader >> 7) // repeat count
{
// just use the first 7 bits
tempChunkHeader = (quint8(tempChunkHeader << 1) >> 1);
file.read(reinterpret_cast<char*>(&tempData), ui32BpP / 8);
for (int i = 0; i <= tempChunkHeader; i++)
{
QColor color;
if (ui32BpP == 32)
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color.setRgba(qRgba(tempData[0], tempData[1], tempData[2], tempData[3]));
else
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color.setRgba(qRgba(tempData[0], tempData[1], tempData[2], 255));
img.setPixel(tmp_pixelIndex % ui32Width, ui32Height - 1 - (tmp_pixelIndex / ui32Width), color.rgba());
tmp_pixelIndex++;
}
}
else // data count
{
// just use the first 7 bits
tempChunkHeader = (uint8_t(tempChunkHeader << 1) >> 1);
for (int i = 0; i <= tempChunkHeader; i++)
{
file.read(reinterpret_cast<char*>(&tempData), ui32BpP / 8);
QColor color;
if (ui32BpP == 32)
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color.setRgba(qRgba(tempData[0], tempData[1], tempData[2], tempData[3]));
else
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color.setRgba(qRgba(tempData[0], tempData[1], tempData[2], 255));
img.setPixel(tmp_pixelIndex % ui32Width, ui32Height - 1 - (tmp_pixelIndex / ui32Width), color.rgba());
tmp_pixelIndex++;
}
}
} while (tmp_pixelIndex < (ui32Width * ui32Height));
}
// not useable format
else
{
success = false;
}
}
if (file.isOpen())
file.close();
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return qMove(img).rgbSwapped();
}