public void Render(Aurigma.GraphicsMill.Bitmap canvas, float zoom, System.Drawing.Rectangle viewport, System.Drawing.Rectangle renderingRegion)
{
if (viewport.Width < 1 || viewport.Height < 1 || renderingRegion.Width < 1 || renderingRegion.Height < 1)
{
return;
}
if (canvas == null)
{
throw new System.ArgumentNullException("canvas");
}
if (canvas.IsEmpty)
{
throw new System.ArgumentException(StringResources.GetString("ExStrBitmapCannotBeEmpty"), "canvas");
}
if (!viewport.Contains(renderingRegion))
{
throw new System.ArgumentException(StringResources.GetString("ExStrRenderingRegionShouldBeInsideViewport"), "renderingRegion");
}
System.Drawing.Rectangle viewportInvalidatedRect = CoordinateMapper.WorkspaceToControl(this.InvalidatedRegion, zoom, System.Drawing.Point.Empty, Aurigma.GraphicsMill.Unit.Point, _renderingResolution);
if (renderingRegion.IntersectsWith(viewportInvalidatedRect) || !_viewportCache.IsEntirelyInCache(zoom, renderingRegion))
{
BuildUpViewportImage(canvas, zoom, viewport, viewportInvalidatedRect);
this.InvalidatedRegion = System.Drawing.RectangleF.Empty;
_viewportCache.UpdateCache(canvas, zoom, viewport);
}
else
{
System.Diagnostics.Debug.Assert(_viewportCache.IsEntirelyInCache(zoom, renderingRegion), "At this point we should already have actual image in cache.");
_viewportCache.DrawCached(canvas, zoom, viewport, renderingRegion);
}
}
public System.Drawing.Rectangle WorkspaceToControl(System.Drawing.RectangleF workspaceRect, Aurigma.GraphicsMill.Unit workspaceUnit)
{
return(CoordinateMapper.WorkspaceToControl(workspaceRect, _zoom, _viewport.Location, workspaceUnit, _resolution));
}
public void Render(Aurigma.GraphicsMill.Bitmap canvas, float zoom, System.Drawing.Rectangle viewport, System.Drawing.Rectangle renderingRegion)
{
if (!_layer.Visible || _layer.VObjects.Count < 1)
{
return;
}
CoordinateMapper coordinateMapper = new CoordinateMapper();
coordinateMapper.Viewport = viewport;
coordinateMapper.Zoom = zoom;
coordinateMapper.Resolution = _renderingResolution;
renderingRegion.X -= viewport.X;
renderingRegion.Y -= viewport.Y;
System.IntPtr dc = System.IntPtr.Zero;
System.IntPtr oldDc = System.IntPtr.Zero;
System.Drawing.Graphics g = null;
Aurigma.GraphicsMill.Drawing.Graphics gdiGraphics = null;
try
{
// Read MSDN KB article "GDI & GDI+ interoperability". We should create System.Drawing.Graphics
// from DC, not from Bitmap to avoid getting sentinel bitmap. Otherwise we will not be able to
// blend images using Aurigma.GraphicsMill.Bitmap.Draw(System.Drawing.Graphics g, ...) method.
//
// The first branch is used when we render to the screen. In this case canvas has 24bppRgb format
// and we just use its GDI graphics (most probably it has been already created by caching renderer) to
// obtain HDC. Second branch is used when we render control content to 32bppArgb image - in such case
// we cannot create GDI graphics and have to manually create DC and select canvas.Handle into it.
if (canvas.PixelFormat == PixelFormat.Format24bppRgb)
{
gdiGraphics = canvas.GetGraphics();
g = System.Drawing.Graphics.FromHdc(gdiGraphics.GetDC());
}
else
{
dc = NativeMethods.CreateCompatibleDC(System.IntPtr.Zero);
if (dc == System.IntPtr.Zero)
{
throw new Aurigma.GraphicsMill.UnexpectedException(StringResources.GetString("Cannot create compatible DC."));
}
g = System.Drawing.Graphics.FromHdc(dc);
}
g.SetClip(renderingRegion);
for (int i = 0; i < _layer.VObjects.Count; i++)
{
System.Drawing.Rectangle bounds = coordinateMapper.WorkspaceToControl(_layer.VObjects[i].GetTransformedVObjectBounds(), Aurigma.GraphicsMill.Unit.Point);
if (bounds.IntersectsWith(renderingRegion))
{
_layer.VObjects[i].Draw(renderingRegion, g, coordinateMapper);
}
}
}
finally
{
if (g != null)
{
g.Dispose();
}
if (gdiGraphics != null)
{
gdiGraphics.Dispose();
}
if (dc != System.IntPtr.Zero)
{
NativeMethods.SelectObject(dc, oldDc);
NativeMethods.DeleteDC(dc);
}
}
}
