MemBitmap CreateHalfSize(MemBitmap orgBmp)
{
//TODO: ...
//
//1. create a new one
MemBitmap smallBmp = new MemBitmap(orgBmp.Width / 2, orgBmp.Height / 2);
using (AggPainterPool.Borrow(smallBmp, out var painter))
{
painter.DrawImage(orgBmp, AffinePlan.Scale(0.5, 0.5));
}
return(smallBmp);
}
MemBitmap ParseAndRenderSvg(System.Text.StringBuilder svgContent)
{
//----------
//copy from HtmlRenderer's SvgViewer demo
//----------
var docBuilder = new VgDocBuilder();
var parser = new SvgParser(docBuilder);
TextSnapshot textSnapshot = new TextSnapshot(svgContent.ToString());
parser.ParseDocument(textSnapshot);
VgVisualDocBuilder builder = new VgVisualDocBuilder();
VgVisualElement vgVisElem = builder.CreateVgVisualDoc(docBuilder.ResultDocument, _vgDocHost).VgRootElem;
RectD bounds = vgVisElem.GetRectBounds();
float actualXOffset = (float)-bounds.Left;
float actualYOffset = (float)-bounds.Bottom;
int bmpW = (int)Math.Round(bounds.Width);
int bmpH = (int)Math.Round(bounds.Height);
if (bmpW == 0 || bmpH == 0)
{
return(null);
}
MemBitmap memBitmap = new MemBitmap(bmpW, bmpH);
using (AggPainterPool.Borrow(memBitmap, out AggPainter p))
using (VgPaintArgsPool.Borrow(p, out VgPaintArgs paintArgs))
{
float orgX = p.OriginX;
float orgY = p.OriginY;
p.SetOrigin(actualXOffset, actualYOffset);
p.Clear(PixelFarm.Drawing.Color.White);
p.FillColor = PixelFarm.Drawing.Color.Black;
double prevStrokeW = p.StrokeWidth;
vgVisElem.Paint(paintArgs);
p.StrokeWidth = prevStrokeW; //restore
p.SetOrigin(orgX, orgY); //restore
}
return(memBitmap);
}
public void Paste()
{
//paste img from clipboard
if (System.Windows.Forms.Clipboard.ContainsImage())
{
//convert clipboard img to
System.Drawing.Bitmap bmp = System.Windows.Forms.Clipboard.GetImage() as System.Drawing.Bitmap;
MemBitmap memBmp = new MemBitmap(bmp.Width, bmp.Height);
PixelFarm.CpuBlit.Imaging.BitmapHelper.CopyFromGdiPlusBitmapSameSizeTo32BitsBuffer(bmp, memBmp);
//...
using (AggPainterPool.Borrow(_lionPng, out var painter))
{
painter.DrawImage(memBmp);
}
}
}
public void Cut()
{
//1.copy
using (MemBitmap memBitmap = _lionPng.CopyImgBuffer(20, 20, 100, 100))
{
using (var platformBmp = CreatePlatformBitmap(memBitmap))
{
System.Windows.Forms.Clipboard.SetImage(platformBmp);
}
}
//2. fill cut area
using (AggPainterPool.Borrow(_lionPng, out var painter))
{
var prevColor = painter.FillColor;
painter.FillColor = Color.White;
painter.FillRect(20.5, 20.5, 100, 100);
painter.FillColor = prevColor;
}
}
void RunSampleA(PixelFarm.Drawing.Painter p)
{
//1. create simple vertical line to test agg's lcd rendernig technique
//create gray-scale actual image
using (MemBitmap glyphBmp = new MemBitmap(100, 100))
{
int x = 10, y = 10;
using (AggPainterPool.Borrow(glyphBmp, out var painter))
{
painter.StrokeColor = PixelFarm.Drawing.Color.Black;
painter.StrokeWidth = 2.0f * 3;
painter.DrawLine(x * 3, 0, y * 3, 20); //scale horizontal 3 times, s
}
//painter.Line(x * 3, 0, y * 3, 20); //scale horizontal 3 times,
//painter.Line(2, 0, 2, 15);
//painter.Line(2, 0, 20, 20);
//painter.Line(2, 0, 30, 15);
//painter.Line(2, 0, 30, 5);
//clear surface bg
p.Clear(PixelFarm.Drawing.Color.White);
//draw img into that bg
//---------------
//convert glyphImg from RGBA to grey Scale buffer
//---------------
//lcd process ...
byte[] glyphGreyScale = CreateGreyScaleBuffer(glyphBmp);
//---------------
//swap gray scale
int newGreyImgStride;
byte[] expanedGreyScaleBuffer = CreateNewExpandedLcdGrayScale(glyphGreyScale, glyphBmp.Width, glyphBmp.Height, out newGreyImgStride);
//blend lcd
var aggPainer = (PixelFarm.CpuBlit.AggPainter)p;
Blend(aggPainer.RenderSurface.DestBitmap, expanedGreyScaleBuffer, newGreyImgStride, glyphBmp.Height);
//---------------
p.DrawImage(glyphBmp, 0, 50);
}
}