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