X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;ds=sidebyside;f=src%2Ffreenet%2Fcaptcha%2Falternatecaptcha2.cpp;fp=src%2Ffreenet%2Fcaptcha%2Falternatecaptcha2.cpp;h=08cbdd663e6c9879095c38217577ea0fb029f366;hb=b7f3b3e6ae9dc527f02b5c06e2eeae0e9cac3ad8;hp=0000000000000000000000000000000000000000;hpb=f8c0410b12183ecb40aafbb44086fa146b25b528;p=fms.git

diff --git a/src/freenet/captcha/alternatecaptcha2.cpp b/src/freenet/captcha/alternatecaptcha2.cpp
new file mode 100644
index 0000000..08cbdd6
--- /dev/null
+++ b/src/freenet/captcha/alternatecaptcha2.cpp
@@ -0,0 +1,117 @@
+#include "../../../include/freenet/captcha/alternatecaptcha2.h"
+
+#include <Poco/Path.h>
+#include <Poco/DirectoryIterator.h>
+
+#include <cmath>
+#include <vector>
+
+#ifdef ALTERNATE_CAPTCHA
+
+AlternateCaptcha2::AlternateCaptcha2()
+{
+	AlternateCaptchaFonts fonts;
+	m_fonts=fonts.Fonts();
+}
+
+void AlternateCaptcha2::Generate()
+{
+	std::string puzzlestring=GenerateRandomString(6);
+	std::vector<int> fontnums(puzzlestring.size(),0);
+	
+	m_solution.clear();
+	m_puzzle.clear();
+	
+	FreeImage::Bitmap bigbmp(300,300,32);
+	bigbmp.SetTransparent();
+
+	// get total width of text
+	int textwidth=0;
+	for(int i=0; i<puzzlestring.size(); i++)
+	{
+		fontnums[i]=rand()%m_fonts.size();
+		textwidth+=m_fonts[fontnums[i]].Char(puzzlestring[i]).Width();
+	}
+
+	RGBQUAD white;
+	white.rgbRed=255;
+	white.rgbGreen=255;
+	white.rgbBlue=255;
+	white.rgbReserved=255;
+	int numlines=(rand()%3)+2;
+	for(int i=0; i<numlines; i++)
+	{
+		int x1=rand()%150;
+		int y1=(rand()%100)+100;
+		int x2=(rand()%150)+150;
+		int y2=(rand()%100)+100;
+		bigbmp.Line(x1,y1,x2,y2,white);
+		bigbmp.Line(x1+1,y1,x2+1,y2,white);
+	}
+	
+	// draw the text on the bigbmp centered
+	int currentx=150-(textwidth/2);
+	for(int i=0; i<puzzlestring.size(); i++)
+	{
+		FreeImage::Bitmap charbmp=m_fonts[fontnums[i]].Char(puzzlestring[i]);
+		bigbmp.BlitTrans(charbmp,currentx,150-(charbmp.Height()/2),0,0,charbmp.Width(),charbmp.Height());
+		currentx+=m_fonts[fontnums[i]].Char(puzzlestring[i]).Width();//+1;
+	}
+	
+	// rotate and skew the big bitmap a few times
+	int lastrot=0;
+	int thisrot=0;
+	int numrots=(rand()%4)+4;
+	for(int i=0; i<numrots; i++)
+	{
+		thisrot=((rand()%180)-90);
+		bigbmp.Rotate(-lastrot+thisrot,0,0,150,150);
+		int offset=rand()%10000;
+		float freq=3.0+(float(rand()%7000)/1000.0);
+		float amp=1.0+(float(rand()%1000)/500.0);
+		for(int y=0; y<bigbmp.Height(); y++)
+		{
+			double shift=sin((double)(y+offset)/freq)*amp;
+			bigbmp.HorizontalOffset(y,shift);
+		}
+		lastrot=thisrot;
+	}
+
+	// rotate the big bitmap back to (almost) horizontal
+	bigbmp.Rotate(-lastrot+((rand()%10)-5),0,0,150,150);
+
+	// grab the center of the big bitmap as the final bitmap
+	FreeImage::Bitmap bmp(110,50,32);
+	bmp.SetTransparent();
+	bmp.Blit(bigbmp,0,0,95,125,110,50,255);
+
+	m_solution.insert(m_solution.end(),puzzlestring.begin(),puzzlestring.end());
+	bmp.SaveToMemory("bmp",m_puzzle);
+
+}
+
+const std::string AlternateCaptcha2::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 AlternateCaptcha2::GetPuzzle(std::vector<unsigned char> &puzzle)
+{
+	puzzle=m_puzzle;
+	return true;
+}
+
+const bool AlternateCaptcha2::GetSolution(std::vector<unsigned char> &solution)
+{
+	solution=m_solution;
+	return true;
+}
+
+#endif	// ALTERNATE_CAPTCHA