Slide 1Slide 2Slide 3Slide 4Slide 5Slide 6Slide 7Slide 8Slide 9Slide 10Programming Languages and Translators Fall 2007Eli Hamburger ([email protected])Michele Merler ([email protected])Jimmy Wei ([email protected])Lin Yang ([email protected])TMIL Text ManIpulation Language•Generate CAPTCHAs(image based RTT)•Manipulate text on multiple images to create animations•Create easily adaptable templates (for web site designers)•Simple, easy to use, c++ like programming language that allows iterative operations text and imagesMotivationTMIL Features•Manipulate color, size, rotation, font of a text•Write text on an image•Draw lines on an image•Open and save images•Build text or lines animations on sequences of imagesLexical Conventions•Basic types (C/C++ like): bool, char, float, int, string•Built-in types: –color (r,g,b)–coordinate (x,y) –image (h,w) –text (name, font, colour, position, size, rotation)•Built-in functions: –open(image, name)–create(image,h,w,bgcolor)–save(image,name)–drawline(image, pos1, pos2, color, width)–int2string, float2string, string2float, string2int, char_at•Operators: () [] + - * / % ++ -- == != > < >= <= && || ! . ,•Special operator: <~ image <~ text : stamps text on imageTMIL Program Sampleint main(){image im;open(im,"Dock.jpg"); // loads image from filetext t; t.name = "dog"; t.font = "Arial.ttf"; t.size = 60;coordinate coor[3]; /* array definition */color c; c.r = c.g = c.b = 50; t.colour = c; for (int i=0; i<=2; i++) {• coor[i].x = i*150; coor[i].y = 200; t.rotation = i*40; t.position = coor[i]; if(i==1) t.font = "Times.ttf";im <~ t; }drawline(im, coor[0], coor[2], c, 5); save(im, "test5.png"); // save image into a filereturn 0;}//int main() {image im;open(im,"Dock.jpg"); loads image from filetext t; t.name = "dog"; t.font = "Arial.ttf"; t.size = 60;coordinate coor[3]; array definition color c; c.r = c.r = c.b = 50; t.colour = c; for (int i=0; i<=2; i++) {• coor[i].x = i*150; coor[i].y = 200; t.rotation = i*40; t.position = coor[i]; if (i==1) t.font = "Times.ttf";im <~ t; }drawline(im, coor[0], coor[2], c, 5); save(im, "test5.png"); // save image into a filereturn 0;}TMIL Program SampleC/C++ comments stylemultiple assignmentscontrol flow statements Stamp operator Built-in functions Built-in type property access main() function required/* */Array accessAnother TMIL Samplevoid circular_draw(image im, text w) { text w1 = w; string name; for(int j = 0; j<15; j++) {name = "./turtle/turtle" + int2string(j+1) + ".jpg"; w1.colour.b -= 30;w1.colour.g -= 10;w1.rotation = - j*(360/15);im <~ w1;save(im,name); }} int main() { image im; open(im, "turtle.jpg"); text w1; w1.name = "turtle"; w1.font = "GOTHIC.ttf"; w1.rotation = 0; w1.size = 80; w1.position.x = im.w/2; w1.position.y = im.h/2; w1.colour.r = w1.colour.g = w1.colour.b = 255; circular_draw(im,w1); return 0;}User defined functionTMIL Compiler ArchitectureInput: TMIL codeTree WalkerSyntax AnalysisSemantic AnalysisLEXER/PARSEROutput: executableG++GDFreeTypeASTC++ Codetmil.hCode GenerationTesting •Lexer Tests •Parser Tests•Walker/Semantic Analysis Tests•Final Programs (more complex and actually do something)Lessons Learned & Conclusions•Start early•Good communication•Pros of teamwork•Modifying grammar•There will always be more corner cases to test•Writing your own compiler is
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