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HTML5 canvas provides following two important properties to apply colors to a shape:
SN | Method and Description |
---|---|
1 | fillStyle This attribute represents the color or style to use inside the shapes. |
2 | strokeStyle This attribute represents the color or style to use for the lines around shapes |
By default, the stroke and fill color are set to black which is CSS color value #000000.
Following is a simple example which makes use of above mentioned fillStyle attribute to create a nice pattern.
<!DOCTYPE HTML> <html> <head> <script type="text/javascript"> function drawShape(){ // get the canvas element using the DOM var canvas = document.getElementById('mycanvas'); // Make sure we don't execute when canvas isn't supported if (canvas.getContext){ // use getContext to use the canvas for drawing var ctx = canvas.getContext('2d'); // Create a pattern for (var i=0;i<7;i++){ for (var j=0;j<7;j++){ ctx.fillStyle='rgb(' + Math.floor(255-20.5*i)+ ','+ Math.floor(255 - 42.5*j) + ',255)'; ctx.fillRect( j*25, i* 25, 55, 55 ); } } } else { alert('You need Safari or Firefox 1.5+ to see this demo.'); } } </script> </head> <body onload="drawShape();"> <canvas id="mycanvas"></canvas> </body> </html> |
The above example would produce following result
To learn above concept - Do Online Practice using latest version of either Safari or Opera.
Following is a simple example which makes use of above mentioned fillStyle attribute to create another nice pattern.
<!DOCTYPE HTML> <html> <head> <script type="text/javascript"> function drawShape(){ // get the canvas element using the DOM var canvas = document.getElementById('mycanvas'); // Make sure we don't execute when canvas isn't supported if (canvas.getContext){ // use getContext to use the canvas for drawing var ctx = canvas.getContext('2d'); // Create a pattern for (var i=0;i<10;i++){ for (var j=0;j<10;j++){ ctx.strokeStyle='rgb(255,'+ Math.floor(50-2.5*i)+','+ Math.floor(155 - 22.5 * j ) + ')'; ctx.beginPath(); ctx.arc(1.5+j*25, 1.5 + i*25,10,10,Math.PI*5.5, true); ctx.stroke(); } } } else { alert('You need Safari or Firefox 1.5+ to see this demo.'); } } </script> </head> <body onload="drawShape();"> <canvas id="mycanvas"></canvas> </body> </html> |
The above example would produce following result
To learn above concept - Do Online Practice using latest version of either Safari or Opera.
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