X-Git-Url: https://git.pterodactylus.net/?p=fms.git;a=blobdiff_plain;f=src%2Ffreenet%2Fcaptcha%2Falternatecaptcha1.cpp;fp=src%2Ffreenet%2Fcaptcha%2Falternatecaptcha1.cpp;h=07f4dde2ee8831540669c85f461f545540576e23;hp=0000000000000000000000000000000000000000;hb=822f84f5dac64183c556bd86fea8cd7b0527f528;hpb=fcb124f8d6d3f5678e82049fb8e5e23c8cfaec6d

diff --git a/src/freenet/captcha/alternatecaptcha1.cpp b/src/freenet/captcha/alternatecaptcha1.cpp
new file mode 100644
index 0000000..07f4dde
--- /dev/null
+++ b/src/freenet/captcha/alternatecaptcha1.cpp
@@ -0,0 +1,148 @@
+#include "../../../include/freenet/captcha/alternatecaptcha1.h"
+
+#include <Poco/Path.h>
+#include <Poco/DirectoryIterator.h>
+
+#include <cmath>
+
+#ifdef ALTERNATE_CAPTCHA
+
+bool AlternateCaptcha1::m_fontsloaded(false);
+std::vector<FreeImage::Font> AlternateCaptcha1::m_fonts;
+
+AlternateCaptcha1::AlternateCaptcha1()
+{
+	if(m_fontsloaded==false)
+	{
+		FreeImage_Initialise(true);
+		LoadFonts();
+		m_fontsloaded=true;
+	}
+}
+
+void AlternateCaptcha1::Generate()
+{
+	std::string puzzlestring=GenerateRandomString(5);
+	FreeImage::Bitmap tempchar(50,50,32);
+	tempchar.SetTransparent();
+	FreeImage::Bitmap bmp(110,50,32);
+	bmp.SetTransparent();
+
+	m_solution.clear();
+	m_puzzle.clear();
+
+	// draw the text
+	if(m_fonts.size()>0)
+	{
+		for(int i=0; i<puzzlestring.size(); i++)
+		{
+			RGBQUAD black;
+			black.rgbRed=0;
+			black.rgbGreen=0;
+			black.rgbBlue=0;
+			int xoffset=(i*20)-(5+(rand()%5));
+			int yoffset=(rand()%20)-10;
+			int fontnum=rand()%m_fonts.size();
+			FreeImage::Bitmap charbmp=m_fonts[fontnum].Char(puzzlestring[i]);
+
+			tempchar.SetTransparent();
+			tempchar.ClearTransparent();
+			tempchar.BlitTrans(charbmp,25-(charbmp.Width()/2),25-(charbmp.Height()/2),0,0,charbmp.Width(),charbmp.Height());
+			tempchar.Rotate((rand()%60)-30,0,0,25,25);
+
+			bmp.BlitTrans(tempchar,xoffset,yoffset,0,0,50,50);
+		}
+	}
+
+	//place some random lines
+	RGBQUAD white;
+	white.rgbRed=255;
+	white.rgbGreen=255;
+	white.rgbBlue=255;
+	white.rgbReserved=255;
+	int numlines=(rand()%5)+10;
+	for(int i=0; i<numlines; i++)
+	{
+		// draw 4 short lines very close to each other
+		int x1[4];
+		int y1[4];
+		int x2[4];
+		int y2[4];
+
+		x1[0]=rand()%bmp.Width();
+		y1[0]=rand()%bmp.Height();
+		x2[0]=x1[0]+(rand()%40)-20;
+		y2[0]=y1[0]+(rand()%40)-20;
+
+		for(int i=1; i<4; i++)
+		{
+			x1[i]=x1[i-1]+rand()%3-1;
+			y1[i]=y1[i-1]+rand()%3-1;
+			x2[i]=x2[i-1]+rand()%3-1;
+			y2[i]=y2[i-1]+rand()%3-1;
+		}
+
+		for(int i=0; i<4; i++)
+		{
+			bmp.Line(x1[i],y1[i],x2[i],y2[i],white);
+		}
+	}
+
+	int offset=rand()%10000;
+	for(int y=0; y<bmp.Height(); y++)
+	{
+		double shift=sin((double)(y+offset)/3.0);
+		bmp.HorizontalOffset(y,shift);
+	}
+
+	m_solution.clear();
+	m_solution.insert(m_solution.end(),puzzlestring.begin(),puzzlestring.end());
+	m_puzzle.clear();
+	bmp.SaveToMemory("bmp",m_puzzle);
+
+}
+
+const std::string AlternateCaptcha1::GenerateRandomString(const int len)
+{
+	// no l,1 O,0 because they look too much alike
+	static std::string chars="abcdefghijkmnopqrstuvwxyzABCDEFGHIJKLMNPQRSTUVWXYZ23456789@#";
+	std::string temp="";
+	for(int i=0; i<len; i++)
+	{
+		temp+=chars[rand()%chars.size()];
+	}
+	return temp;
+}
+
+const bool AlternateCaptcha1::GetPuzzle(std::vector<unsigned char> &puzzle)
+{
+	puzzle=m_puzzle;
+	return true;
+}
+
+const bool AlternateCaptcha1::GetSolution(std::vector<unsigned char> &solution)
+{
+	solution=m_solution;
+	return true;
+}
+
+void AlternateCaptcha1::LoadFonts()
+{
+	FreeImage::Bitmap bmp;
+	Poco::Path path("fonts");
+	Poco::DirectoryIterator di(path);
+	Poco::DirectoryIterator end;
+
+	while(di!=end)
+	{
+		if(di.name().find("bmp")!=std::string::npos)
+		{
+			bmp.Load("bmp",di.path().toString());
+			m_fonts.push_back(FreeImage::Font(bmp));
+		}
+		++di;
+	}
+
+}
+
+#endif	// ALTERNATE_CAPTCHA