void generate_alpha_mask(ScanlineRasToDestBitmapRenderer sclineRasToBmp, ScanlinePacked8 sclnPack, ScanlineRasterizer rasterizer, int width, int height)
{
alphaBitmap = new ActualImage(width, height, PixelFormat.GrayScale8);
var bmpReaderWrtier = new MyImageReaderWriter(alphaBitmap);
alphaMaskImageBuffer = new ChildImage(bmpReaderWrtier, new PixelBlenderGray(1));
alphaMask = new AlphaMaskByteClipped(alphaMaskImageBuffer, 1, 0);
#if USE_CLIPPING_ALPHA_MASK
//alphaMaskImageBuffer.AttachBuffer(alphaBitmap.GetBuffer(), 20 * width + 20, width - 40, height - 40, width, 8, 1);
#else
alphaMaskImageBuffer.attach(alphaByteArray, (int)cx, (int)cy, cx, 1);
#endif
var image = new ChildImage(alphaMaskImageBuffer, new PixelBlenderGray(1), 1, 0, 8);
ClipProxyImage clippingProxy = new ClipProxyImage(image);
clippingProxy.Clear(ColorRGBA.Black);
VertexSource.Ellipse ellipseForMask = new PixelFarm.Agg.VertexSource.Ellipse();
System.Random randGenerator = new Random(1432);
int i;
int num = (int)maskAlphaSliderValue;
for (i = 0; i < num; i++)
{
if (i == num - 1)
{
ellipseForMask.Reset(Width / 2, Height / 2, 110, 110, 100);
rasterizer.AddPath(ellipseForMask.MakeVertexSnap());
sclineRasToBmp.RenderWithColor(clippingProxy, rasterizer, sclnPack, new ColorRGBA(0, 0, 0, 255));
ellipseForMask.Reset(ellipseForMask.originX, ellipseForMask.originY, ellipseForMask.radiusX - 10, ellipseForMask.radiusY - 10, 100);
rasterizer.AddPath(ellipseForMask.MakeVertexSnap());
sclineRasToBmp.RenderWithColor(clippingProxy, rasterizer, sclnPack, new ColorRGBA(255, 0, 0, 255));
}
else
{
ellipseForMask.Reset(randGenerator.Next() % width,
randGenerator.Next() % height,
randGenerator.Next() % 100 + 20,
randGenerator.Next() % 100 + 20,
100);
// set the color to draw into the alpha channel.
// there is not very much reason to set the alpha as you will get the amount of
// transparency based on the color you draw. (you might want some type of different edeg effect but it will be minor).
rasterizer.AddPath(ellipseForMask.MakeVxs());
sclineRasToBmp.RenderWithColor(clippingProxy, rasterizer, sclnPack,
ColorRGBA.Make((int)((float)i / (float)num * 255), 0, 0, 255));
}
}
}
public override void Draw(Graphics2D graphics2D)
{
if (graphics2D.DestImage != null)
{
IImageReaderWriter backBuffer = graphics2D.DestImage;
IPixelBlender currentPixelBlender = graphics2D.PixelBlender;
int distBetween = backBuffer.BytesBetweenPixelsInclusive;
//use different pixel blender
var redImageBuffer = new ChildImage(backBuffer, new PixelBlenderGray(distBetween), distBetween, CO.R, 8);
var greenImageBuffer = new ChildImage(backBuffer, new PixelBlenderGray(distBetween), distBetween, CO.G, 8);
var blueImageBuffer = new ChildImage(backBuffer, new PixelBlenderGray(distBetween), distBetween, CO.B, 8);
ClipProxyImage clippingProxy = new ClipProxyImage(backBuffer);
ClipProxyImage clippingProxyRed = new ClipProxyImage(redImageBuffer);
ClipProxyImage clippingProxyGreen = new ClipProxyImage(greenImageBuffer);
ClipProxyImage clippingProxyBlue = new ClipProxyImage(blueImageBuffer);
ScanlineRasterizer sclineRas = graphics2D.ScanlineRasterizer;
ScanlinePacked8 scline = graphics2D.ScanlinePacked8;
ColorRGBA clearColor = this.UseBlackBlackground ? new ColorRGBA(0, 0, 0) : new ColorRGBA(255, 255, 255);
clippingProxy.Clear(clearColor);
ColorRGBA fillColor = this.UseBlackBlackground ?
new ColorRGBA(255, 255, 255, (byte)(this.AlphaValue)) :
new ColorRGBA(0, 0, 0, (byte)(this.AlphaValue));
ScanlineRasToDestBitmapRenderer sclineRasToBmp = graphics2D.ScanlineRasToDestBitmap;
VertexSource.Ellipse er = new PixelFarm.Agg.VertexSource.Ellipse(Width / 2 - 0.87 * 50, Height / 2 - 0.5 * 50, 100, 100, 100);
sclineRas.AddPath(er.MakeVertexSnap());
sclineRasToBmp.RenderWithColor(clippingProxyRed, sclineRas, scline, fillColor);
VertexSource.Ellipse eg = new PixelFarm.Agg.VertexSource.Ellipse(Width / 2 + 0.87 * 50, Height / 2 - 0.5 * 50, 100, 100, 100);
sclineRas.AddPath(eg.MakeVertexSnap());
sclineRasToBmp.RenderWithColor(clippingProxyGreen, sclineRas, scline, fillColor);
VertexSource.Ellipse eb = new PixelFarm.Agg.VertexSource.Ellipse(Width / 2, Height / 2 + 50, 100, 100, 100);
sclineRas.AddPath(eb.MakeVertexSnap());
sclineRasToBmp.RenderWithColor(clippingProxyBlue, sclineRas, scline, fillColor);
}
// else if (graphics2D.DestImageFloat != null)
// {
//#if false
// IImageFloat backBuffer = graphics2D.DestImageFloat;
// int distBetween = backBuffer.GetFloatsBetweenPixelsInclusive();
// ImageBufferFloat redImageBuffer = new ImageBufferFloat();
// redImageBuffer.Attach(backBuffer, new blender_gray(distBetween), distBetween, 2, 8);
// ImageBufferFloat greenImageBuffer = new ImageBufferFloat();
// greenImageBuffer.Attach(backBuffer, new blender_gray(distBetween), distBetween, 1, 8);
// ImageBufferFloat blueImageBuffer = new ImageBufferFloat();
// blueImageBuffer.Attach(backBuffer, new blender_gray(distBetween), distBetween, 0, 8);
// ImageClippingProxy clippingProxy = new ImageClippingProxy(backBuffer);
// ImageClippingProxy clippingProxyRed = new ImageClippingProxy(redImageBuffer);
// ImageClippingProxy clippingProxyGreen = new ImageClippingProxy(greenImageBuffer);
// ImageClippingProxy clippingProxyBlue = new ImageClippingProxy(blueImageBuffer);
// ScanlineRasterizer ras = new ScanlineRasterizer();
// ScanlineCachePacked8 sl = new ScanlineCachePacked8();
// RGBA_Bytes clearColor = useBlackBackgroundCheckbox.Checked ? new RGBA_Bytes(0, 0, 0) : new RGBA_Bytes(255, 255, 255);
// clippingProxy.clear(clearColor);
// alphaSlider.View.BackGroundColor = clearColor;
// RGBA_Bytes FillColor = useBlackBackgroundCheckbox.Checked ? new RGBA_Bytes(255, 255, 255, (int)(alphaSlider.Value)) : new RGBA_Bytes(0, 0, 0, (int)(alphaSlider.Value));
// VertexSource.Ellipse er = new AGG.VertexSource.Ellipse(Width / 2 - 0.87 * 50, Height / 2 - 0.5 * 50, 100, 100, 100);
// ras.add_path(er);
// agg_renderer_scanline.Default.render_scanlines_aa_solid(clippingProxyRed, ras, sl, FillColor);
// VertexSource.Ellipse eg = new AGG.VertexSource.Ellipse(Width / 2 + 0.87 * 50, Height / 2 - 0.5 * 50, 100, 100, 100);
// ras.add_path(eg);
// agg_renderer_scanline.Default.render_scanlines_aa_solid(clippingProxyGreen, ras, sl, FillColor);
// VertexSource.Ellipse eb = new AGG.VertexSource.Ellipse(Width / 2, Height / 2 + 50, 100, 100, 100);
// ras.add_path(eb);
// agg_renderer_scanline.Default.render_scanlines_aa_solid(clippingProxyBlue, ras, sl, FillColor);
//#endif
// }
}