<canvas id ="cvs49"
width ="150"
height =
"150"
onclick="gereclick(event)"> votre navigateur n'accepte pas Canvas </canvas> <script> var canv1 = document.getElementById('cvs49'); var context1 = canv1.getContext('2d'); context1.fillStyle= "#0110A0"; context1.fillRect(0, 0,150,150); function gereclick(event) { var imageD = context1.getImageData(0,0,150,150) var mapP=imageD.data; alert("code RGBA du second pixel : R= "+mapP[4]+", V= "+mapP[5]+", B= " +mapP[6]+", A= "+mapP[7]);> };  </script> |
cliquez pour affiche les couleurs du second pixel! |