private string InvertFilter(ICanvasRenderingContext2D ctx)
{
var di = new DirectoryInfo(Application.StartupPath);
string url = di.Parent.Parent.Parent.FullName + "\\SharpCanvas.Tests\\" + @"Originals\Filters\initial.jpg";
ctx.drawImage(url, 0, 0);
var data = (ImageData) ctx.getImageData(0, 0, 121, 121);
/*
var chain = (FilterChain) ctx.createFilterChain();
var filter = new InvertFilter();
chain.AddFilter(filter);
data.applyFilters(chain);
ctx.putImageData(data, 0, 0);
*/
return @"Originals\Filters\InvertFilter.png";
}
private void grayscale(ImageData image, ICanvasRenderingContext2D ctx)
{
ctx.drawImage(image, 0, 0);
uint imgWidth = image.width;
uint imgHeight = image.height;
var imageData = (ImageData) ctx.getImageData(0, 0, imgWidth, imgHeight);
for (ulong i = 0; i < imageData.height; i++)
{
for (ulong j = 0; j < imageData.width; j++)
{
ulong index = (i*4)*imageData.width + (j*4);
var red = (byte) imageData.data[index];
var green = (byte) imageData.data[index + 1];
var blue = (byte) imageData.data[index + 2];
var alpha = (byte) imageData.data[index + 3];
var average = (byte) ((red + green + blue)/3);
imageData.data[index] = average;
imageData.data[index + 1] = average;
imageData.data[index + 2] = average;
imageData.data[index + 3] = alpha;
}
}
ctx.putImageData(imageData, imageData.width + 5, 0, 0, 0, imageData.width, imageData.height);
}
private string sample5(ICanvasRenderingContext2D ctx)
{
var img = new ImageData();
img.src = @"backdrop.png";
ctx.drawImage(img, 0, 0, 0, 0);
ctx.beginPath();
ctx.moveTo(30, 96);
ctx.lineTo(70, 66);
ctx.lineTo(103, 76);
ctx.lineTo(170, 15);
ctx.stroke();
return @"Originals\Images\sample5.png";
}
private string sample7(ICanvasRenderingContext2D ctx)
{
var img = new ImageData();
img.src = @"rhino.jpg";
var imgFrame = new ImageData();
imgFrame.src = @"picture_frame.png";
ctx.drawImage(img, 33, 71, 104, 124, 21, 20, 87, 104);
//ctx.commit();
ctx.drawImage(imgFrame, 0, 0, 0, 0);
//ctx.commit();
return @"Originals\Images\sample7.png";
}
private string sample6(ICanvasRenderingContext2D ctx)
{
var img = new ImageData();
img.src = @"rhino.jpg";
for (int i = 0; i < 4; i++)
{
for (int j = 0; j < 3; j++)
{
ctx.drawImage(img, j*50, i*38, 50, 38);
}
}
return @"Originals\Images\sample6.png";
}
