private CanvasRenderTarget GetDrawing(bool isedit)
{
double w, h; //画布大小
if (isedit) //编辑状态
{
w = editCanvas.ActualWidth;
h = editCanvas.ActualHeight;
}
else //最终生成图片 有一定的scale
{
Rect des = GetImageDrawingRect();
w = (editimage.Size.Width / des.Width) * editCanvas.Width;
h = (editimage.Size.Height / des.Height) * editCanvas.Height;
}
var scale = isedit ? 1 : w / editCanvas.Width; //缩放比例
CanvasDevice device = CanvasDevice.GetSharedDevice();
CanvasRenderTarget target = new CanvasRenderTarget(device, (float)w, (float)h, 96);
using (CanvasDrawingSession graphics = target.CreateDrawingSession())
{
//绘制背景
graphics.Clear(_back_color);
//绘制底图
DrawBackImage(graphics, scale);
//绘制涂鸦
if (_doodleUIs != null && _doodleUIs.Count > 0)
{
var list = _doodleUIs.ToList(); list.Reverse();
list.ForEach((d) => { d.Draw(graphics, (float)scale); }); //绘制历史涂鸦
}
if (_current_editing_doodleUI != null)
{
_current_editing_doodleUI.Draw(graphics, (float)scale); //绘制当前涂鸦
}
//绘制贴图
if (_wall_paperUI != null)
{
_wall_paperUI.Draw(graphics, (float)scale);
}
//水印
if (haveWatermark)
{
graphics.DrawText(watermark_text, (float)editCanvas.Width / 2 - 2, (float)editCanvas.Height / 2, Colors.Black, new CanvasTextFormat()
{
FontFamily = "微软雅黑", FontSize = 15
});
}
////绘制Tag
//if (_tagsUIs != null)
//{
// _tagsUIs.ForEach((t) => { t.Draw(graphics, (float)scale); });
//}
//绘制Crop裁剪工具
if (cutmanage != null && isedit)
{
cutmanage.Draw(graphics, (float)scale);
}
}
return(target);
}
