rle and 24bit support,

need to write direct into image for performance

QtMeshViewer/Header/tga.h

+#pragma once
+#include <fstream>
+#include <QImage>
+#include <QColor>
+
+#include <iostream>
+
+QImage loadTga(const char* filePath, bool &success)
+{
+	QImage img;
+	if (!img.load(filePath))
+	{
+
+		// open the file
+		std::fstream fsPicture(filePath, std::ios::in | std::ios::binary);
+
+		if (!fsPicture.is_open())
+		{
+			img = QImage(1, 1, QImage::Format_RGB32);
+			img.fill(Qt::red);
+			success = false;
+			return img;
+		}
+
+		// some variables
+		std::vector<std::uint8_t>* vui8Pixels;
+		std::uint32_t ui32BpP;
+		std::uint32_t ui32Width;
+		std::uint32_t ui32Height;
+
+		// read in the header
+		std::uint8_t ui8x18Header[19] = { 0 };
+		fsPicture.read(reinterpret_cast<char*>(&ui8x18Header), sizeof(ui8x18Header) - 1);
+
+		//get variables
+		vui8Pixels = new std::vector<std::uint8_t>;
+		bool bCompressed;
+		std::uint32_t ui32IDLength;
+		std::uint32_t ui32PicType;
+		std::uint32_t ui32PaletteLength;
+		std::uint32_t 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;
+		bCompressed = ui32PicType == 9 || ui32PicType == 10;
+		vui8Pixels->resize(ui32Size);
+
+		// jump to the data block
+		fsPicture.seekg(ui32IDLength + ui32PaletteLength, std::ios_base::cur);
+
+		if (ui32PicType == 2 && (ui32BpP == 24 || ui32BpP == 32))
+		{
+			fsPicture.read(reinterpret_cast<char*>(vui8Pixels->data()), ui32Size);
+		}
+		// else if compressed 24 or 32 bit
+		else if (ui32PicType == 10 && (ui32BpP == 24 || ui32BpP == 32))	// compressed
+		{
+			std::uint8_t tempChunkHeader;
+			std::uint8_t tempData[5];
+			unsigned int tempByteIndex = 0;
+
+			do {
+				fsPicture.read(reinterpret_cast<char*>(&tempChunkHeader), sizeof(tempChunkHeader));
+
+				if (tempChunkHeader >> 7)	// repeat count
+				{
+					// just use the first 7 bits
+					tempChunkHeader = (uint8_t(tempChunkHeader << 1) >> 1);
+
+					fsPicture.read(reinterpret_cast<char*>(&tempData), ui32BpP / 8);
+
+					for (int i = 0; i <= tempChunkHeader; i++)
+					{
+						vui8Pixels->at(tempByteIndex++) = tempData[0];
+						vui8Pixels->at(tempByteIndex++) = tempData[1];
+						vui8Pixels->at(tempByteIndex++) = tempData[2];
+						if (ui32BpP == 32) vui8Pixels->at(tempByteIndex++) = tempData[3];
+					}
+				}
+				else						// data count
+				{
+					// just use the first 7 bits
+					tempChunkHeader = (uint8_t(tempChunkHeader << 1) >> 1);
+
+					for (int i = 0; i <= tempChunkHeader; i++)
+					{
+						fsPicture.read(reinterpret_cast<char*>(&tempData), ui32BpP / 8);
+
+						vui8Pixels->at(tempByteIndex++) = tempData[0];
+						vui8Pixels->at(tempByteIndex++) = tempData[1];
+						vui8Pixels->at(tempByteIndex++) = tempData[2];
+						if (ui32BpP == 32) vui8Pixels->at(tempByteIndex++) = tempData[3];
+					}
+				}
+			} while (tempByteIndex < ui32Size);
+		}
+		// not useable format
+		else
+		{
+			fsPicture.close();
+			img = QImage(1, 1, QImage::Format_RGB32);
+			img.fill(Qt::red);
+			success = false;
+			return img;
+		}
+
+		fsPicture.close();
+
+		img = QImage(ui32Width, ui32Height, QImage::Format_RGB888);
+		
+		int pixelSize = ui32BpP == 32 ? 4 : 3;
+		//TODO: write direct into img
+		for (unsigned int x = 0; x < ui32Width; x++)
+		{
+			for (unsigned int y = 0; y < ui32Height; y++)
+			{
+				int valr = vui8Pixels->at(y * ui32Width * pixelSize + x * pixelSize + 2);
+				int valg = vui8Pixels->at(y * ui32Width * pixelSize + x * pixelSize + 1);
+				int valb = vui8Pixels->at(y * ui32Width * pixelSize + x * pixelSize);
+
+				QColor value(valr, valg, valb);
+				img.setPixelColor(x, y, value);
+			}
+		}
+
+		img = img.mirrored();
+
+	}
+	success = true;
+	return img;
+}

QtMeshViewer/Source/GeometryEngine.cpp

@@ -2,6 +2,7 @@
 #include "..\Header\MshFile.h"
 #include "..\Header\OglViewerWidget.h"
 #include "..\Header\MainWindow.h"
+#include "..\Header\tga.h"
 #include <cmath>
 
 
@@ -110,13 +111,8 @@ void GeometryEngine::loadFile(const char* filePath)
 
 void GeometryEngine::loadTexture(const char* filePath)
 {
-	
-	QImage img;
-	if (!img.load(filePath))
-	{
-		img = QImage(1, 1, QImage::Format_RGB32);
-		img.fill(Qt::red);
-	}
+	bool loadSuccess;
+	QImage img = loadTga(filePath, loadSuccess);
 
 	// Load image to OglTexture
 	QOpenGLTexture* new_texture = new QOpenGLTexture(img.mirrored());

QtMeshViewer/Source/MainWindow.cpp

@@ -5,6 +5,7 @@
 #include <QFileDialog>
 #include <QFile>
 #include <QPalette>
+#include "..\Header\FileInterface.h"
 
 #define WINDOW_NAME "Mesh Viewer"