- Added Multithreading project

- Update README.md
seancyw · Feb 13, 2017 · c6e3c04 · c6e3c04
1 parent ea93a61
commit c6e3c04
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diff --git a/Multithreading.sln b/Multithreading.sln
@@ -0,0 +1,28 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
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+EndProject
+Global
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+		{1F13832B-3582-43A3-8A9C-47F09665CFA6}.Release|x64.Build.0 = Release|x64
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diff --git a/Multithreading/Multithreading.vcxproj b/Multithreading/Multithreading.vcxproj
@@ -0,0 +1,130 @@
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+<Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
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+      <Platform>Win32</Platform>
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+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
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+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{1F13832B-3582-43A3-8A9C-47F09665CFA6}</ProjectGuid>
+    <RootNamespace>Multithreading</RootNamespace>
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+    <ClCompile Include="main.cpp" />
+    <ClCompile Include="PPM.cpp" />
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diff --git a/Multithreading/Multithreading.vcxproj.filters b/Multithreading/Multithreading.vcxproj.filters
@@ -0,0 +1,30 @@
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+    <Filter Include="Source Files">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
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+      <Extensions>h;hh;hpp;hxx;hm;inl;inc;xsd</Extensions>
+    </Filter>
+    <Filter Include="Resource Files">
+      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
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+  <ItemGroup>
+    <ClCompile Include="main.cpp">
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+    <ClCompile Include="PPM.cpp">
+      <Filter>Source Files</Filter>
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+    <ClInclude Include="PPM.h">
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+    </ClInclude>
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+</Project>
diff --git a/Multithreading/PPM.cpp b/Multithreading/PPM.cpp
@@ -0,0 +1,145 @@
+#include "PPM.h"
+#include <iostream>
+#include <fstream>
+#include <sstream>
+#include <exception>
+
+PPM::PPM()
+{
+	initialize();
+}
+
+//create a PPM object and fill it with data stored in source
+PPM::PPM(const std::string & fileName)
+{
+	initialize();
+	read(fileName);
+}
+
+//create an "empty" PPM image with a given width and height
+PPM::PPM(const unsigned int width, const unsigned int height)
+{
+	initialize();
+
+	_width         = width;
+	_height        = height;
+	_lineNumber    = height;
+	_columnsNumber = width;
+	_size		   = width * height;
+
+	_r.resize(_size, 0);
+	_g.resize(_size, 0);
+	_b.resize(_size, 0);
+}
+
+//free memory when object is destroyed
+PPM::~PPM()
+{
+
+}
+
+//read PPM image from filename
+void PPM::read(const std::string & fileName)
+{
+	//initialize stream
+	std::ifstream input(fileName.c_str(), std::ios::in | std::ios::binary);
+
+	//if file open successfully
+	if (input.is_open()) {
+		std::string line;
+		std::getline(input, line);
+
+		if (line != "P6") {
+			std::cout << "Error. Unrecognized file format" << std::endl;
+		}
+
+		std::getline(input, line);
+		while (line[0] == '#') {
+			std::getline(input, line);
+		}
+
+		std::stringstream dimension(line);
+
+		try {
+			dimension >> _width;
+			dimension >> _height;
+			_lineNumber    = _height;
+			_columnsNumber = _width;
+		}
+		catch (std::exception & exception) {
+			std::cout << "Header file format error." << exception.what() << std::endl;
+			return;
+		}
+
+		std::getline(input, line);
+		std::stringstream maximumValue(line);
+
+		try {
+			maximumValue >> _maximumColumn;
+		}
+		catch (std::exception & exception) {
+			std::cout << "Header file format error." << exception.what() << std::endl;
+			return;
+		}
+
+		_size = _width * _height;
+
+		_r.reserve(_size);
+		_g.reserve(_size);
+		_b.reserve(_size);
+
+		//Set data for R,G,B
+		char data;
+		for (unsigned int i = 0; i < _size; ++i) {
+			input.read(&data, 1);
+			_r[i] = (unsigned char)data;
+			_g[i] = (unsigned char)data;
+			_b[i] = (unsigned char)data;
+		}
+	}
+	else {
+		std::cout << "Error. Unable to open " << fileName << std::endl;
+	}
+
+	//Close the stream
+	input.close();
+}
+
+//write PPM image to filename
+void PPM::write(const std::string & fileName)
+{
+	//Initialize the stream
+	std::ofstream output(fileName.c_str(), std::ios::out | std::ios::binary);
+
+	if (output.is_open) {
+
+		output << "P6\n";
+		output << _width;
+		output << " ";
+		output << _height << "\n";
+		output << _maximumColumn << "\n";
+
+		char data;
+		for (unsigned int i = 0; i < _size; ++i) {
+			data = (char)_r[i];
+			output.write(&data, 1);
+			data = (char)_g[i];
+			output.write(&data, 1);
+			data = (char)_b[i];
+			output.write(&data, 1);
+		}
+	}
+	else {
+		std::cout << "Error. Unable to open " << fileName << std::endl;
+	}
+
+	//Close the stream
+	output.close();
+}
+
+void PPM::initialize()
+{
+	_width         = 0;
+	_height        = 0;
+	_maximumColumn = 255;
+}
diff --git a/Multithreading/PPM.h b/Multithreading/PPM.h
@@ -0,0 +1,51 @@
+
+#ifndef PPM_H
+#define PPM_H
+
+//references from https://github.com/sol-prog/threads/blob/master/image_processing/ppm.cpp
+#include <string>
+#include <vector>
+
+class PPM
+{
+public:
+	PPM();
+
+	//create a PPM object and fill it with data stored in source
+	PPM(const std::string & fileName);
+
+	//create an "empty" PPM image with a given width and height
+	PPM(const unsigned int width, const unsigned int height);
+
+	//free memory when object is destroyed
+	~PPM();
+
+	//read PPM image from filename
+	void read(const std::string & fileName);
+
+	//write PPM image to filename
+	void write(const std::string & fileName);
+
+private:
+	bool isAllocated;
+	void initialize();
+
+	//information about PPM file(height and width)
+	unsigned int _lineNumber;
+	unsigned int _columnsNumber;
+
+	//arrays for storing R,G,B values
+	std::vector< unsigned char > _r;
+	std::vector< unsigned char > _g;
+	std::vector< unsigned char > _b;
+
+	unsigned int _height;
+	unsigned int _width;
+	unsigned int _maximumColumn;
+
+	//total number of elements(pixels)
+	unsigned int _size;
+
+};
+
+#endif