#!/usr/local/bin/pike // pic2html v0.5 - converts images into HTML text // Author: Patrik Roos ( patrik@text-image.com ) // Language: Pike 7.6 ( http://pike.ida.liu.se/ ) // VARIABLES // Initialize variables int timestart = time(); // Check when script started int textType_count = -1; // Start at the beginning string textType = "sequence"; // Default to sequence array HTMLcharacter = ({ "0", "1" }); // Default to 0's and 1's string bgColor = "black"; // Default to black background int|string fontSize = -3; // Default to font size -3 int grayscale = 0; // Default to colour string browser = "ie"; // Default to Internet Explorer int contrast = 0; // Apply contrast curve // Contrast curve (sine) array(int) contrastcurve = ({ 0,0,0,0,0,0,0,0,1,1,1,1,1,2,2,2,2,3,3,3,4,4,5,5,6,6,6,7,8,8,9,9,10,10,11,12,12,13,14,14,15,16,17,17,18,19,20,21,22,23,23,24,25,26,27,28,29,30,31,32,33,34,35,37,38,39,40,41,42,43,45,46,47,48,49,51,52,53,54,56,57,58,60,61,62,64,65,66,68,69,71,72,73,75,76,78,79,81,82,84,85,87,88,90,91,93,94,96,97,99,100,102,103,105,106,108,109,111,113,114,116,117,119,120,122,124,125,127,128,130,131,133,135,136,138,139,141,142,144,146,147,149,150,152,153,155,156,158,159,161,162,164,165,167,168,170,171,173,174,176,177,179,180,182,183,184,186,187,189,190,191,193,194,195,197,198,199,201,202,203,204,206,207,208,209,210,212,213,214,215,216,217,218,220,221,222,223,224,225,226,227,228,229,230,231,232,232,233,234,235,236,237,238,238,239,240,241,241,242,243,243,244,245,245,246,246,247,247,248,249,249,249,250,250,251,251,252,252,252,253,253,253,253,254,254,254,254,254,255,255,255,255,255,255,255,255 }); // Some more strings that will be used string imageURL; string HTMLheader, beginHTML, endHTML, fontHTMLstart, fontHTMLend; // FUNCTIONS // Function to decide what the HTML page should look like void setHTMLvars() { HTMLheader = "\n\n"; beginHTML = "Text image\n"; endHTML = "\n"; fontHTMLstart = ""; } // Function to write an HTML error page void werr(string errorMessage) { setHTMLvars(); write(HTMLheader + "\n" + beginHTML + "\n"); write("
Error: " + errorMessage + "
\n"); write(endHTML + "\n"); return; } // Function to choose next character for output string nextCharacter() { if (sizeof(HTMLcharacter) == 1) { return HTMLcharacter[0]; } if (textType == "random") { return HTMLcharacter[random(sizeof(HTMLcharacter))]; } else if (textType == "sequence") { textType_count++; if (textType_count >= sizeof(HTMLcharacter)) { textType_count = 0; return HTMLcharacter[0]; } return HTMLcharacter[textType_count]; } } // Main program int main(int argc, array(string) argv) { write("Content-Type: text/html\r\n\r\n"); // Start outputting HTML int imageWidth = 130; // Default to 130 characters wide // Make sure user posted data and that it's not too large int temp = (int)getenv("CONTENT_LENGTH"); if (!temp) { werr("No image specified."); return 0; } if (temp > 10485760) { werr("Image too large (10MB limit)."); return 0; } // Read posted data from user string info = Stdio.stdin.read(temp); if (strlen(info) < temp) { werr("Insufficient data uploaded."); return 0; } // Record the headers used mapping(string:string) headies = ([ ]); headies["content-type"] = getenv("CONTENT_TYPE"); headies["content-length"] = getenv("CONTENT_LENGTH"); string imageData; // Put the data into strings to see what settings the user chose object msg = MIME.Message( info, headies ); foreach(msg->body_parts, object food) { switch (food->disp_params->name) { case "image": imageURL = food->get_filename(); imageData = food->getdata(); break; case "textType": textType = food->getdata(); break; case "width": imageWidth = (int)(food->getdata()); break; case "characters": HTMLcharacter = food->getdata() / ""; break; case "bgcolor": bgColor = food->getdata(); break; case "fontsize": fontSize = food->getdata(); break; case "grayscale": grayscale = (int)(food->getdata()); break; case "browser": browser = food->getdata(); break; case "contrast": contrast = (int)(food->getdata()); break; default: break; } } // Now set the HTML layout setHTMLvars(); // Check if there's been an image submitted, and exit if there hasn't if (!imageURL) { imageURL = "Error"; werr("Must specify image."); return 0; } // Check if width is within limits, and force to 100 if not if (imageWidth < 1 || imageWidth > 500) { imageWidth = 100; } // Create image from data Image.Image image; mixed imageerror = catch { image = Image.ANY.decode(imageData); }; // Check if there's been an error creating the image, exit if there has if (!image || imageerror) { werr("Failed to get image."); return 0; } if (contrast) // Apply contrast curve image = image->apply_curve(contrastcurve); image = image->scale(imageWidth,0); // Resize to fit chosen width if (browser == "ie") image = image->scale(1.0,0.65); // Fix aspect ratio (Internet Explorer) else image = image->scale(1.0,0.43); // Fix aspect ratio (Firefox) if (grayscale == 1) image = image->grey(); if (grayscale == 2) image = image->grey()->threshold(128,128,128); int width = image->xsize(); int height = image->ysize(); if (width > 2000 || height > 2000) { werror("Image size too large."); return 0; } // Start outputting the HTML page if (HTMLheader) { write(HTMLheader); } write(beginHTML); write("\n
\n\n\n\n
");

        array(int) colours;

        array(int) oldcolours = ({ -1 });               // Set impossible value for previous colours

        // Now for the fun stuff:
        // First we make some loops that will go through each line, one by one.
        // The inner loop will read each pixel's colour and then output the corresponding HTML coloured character
        // It also checks if the last character had the same colour, and if so doesn't output the same colour codes
        //  again, thus saving a few bytes.
        // The outer loop should explain itself.
        for (int y = 0; y < height; y++) {

                for (int x = 0; x < width; x++) {
                        colours = image->getpixel(x,y);
                        if (!equal(colours,oldcolours)) {
                                Image.Color.Color colour = Image.Color.rgb(colours[0],colours[1],colours[2]);
                                if (x == 0)
                                        write(fontHTMLstart + colour->html() + ">" + nextCharacter());
                                else
                                        write(fontHTMLend + fontHTMLstart + colour->html() + ">" + nextCharacter());
                        }
                        else {
                                write(nextCharacter());
                        }

                        oldcolours = colours;
                }

                oldcolours = ({ -1 });
                write(fontHTMLend + "
");
        }

        // We're done! Finish up the HTML page, and tell the user how long it took
        write("\n
"); write("\n\n"); write("\n

Rendering time: " + (int)round(time(timestart)) + " seconds.
\n"); write(endHTML); }