// External API
public void RenderImage(ImageProxy image, Rect dest, Geometry clip, Matrix trans, string desp)
{
if (image == null)
{
return;
}
Geometry bounds;
bool clipToBounds;
if (clip == null)
{
// no clipping needed, draw everything
bounds = Utility.TransformGeometry(new RectangleGeometry(dest), trans);
clipToBounds = false;
}
else
{
// clip to provided geometry. it's already in world space
bounds = clip;
clipToBounds = true;
}
RenderImage(image, dest, bounds, clipToBounds, 0, trans, desp);
}
void IProxyDrawingContext.DrawImage(ImageProxy image, Rect dest, Geometry clip, Matrix trans)
{
bool empty;
clip = Utility.Intersect(_clip, Utility.TransformGeometry(clip, _transform), Matrix.Identity, out empty);
if (empty)
{
return;
}
ImagePrimitive ip = new ImagePrimitive();
// Fix bug 1460208: Give each ImagePrimitive its own ImageProxy, since rendering may alter
// the images.
ip.Image = image.Clone();
ip.DstRect = dest;
ip.Clip = clip;
ip.Transform = trans * _transform;
ip.PushOpacity(_opacity, _opacityMask);
_flattener.AddPrimitive(ip);
}
void IProxyDrawingContext.DrawImage(ImageProxy image, Rect dest, Geometry clip, Matrix trans)
{
if (_costing)
{
_cost += image.PixelWidth * image.PixelHeight * 3;
return;
}
// Sometimes clip selects only a small portion of the image. Clip image to reduce amount
// of data sent to GDI.
if (clip != null)
{
if (!Utility.IsRenderVisible(clip.Bounds))
{
// completely clipped away
return;
}
// transform clip to image space, taking into account image DPI
Matrix imageTransform = new Matrix();
imageTransform.Scale(dest.Width / image.Image.Width, dest.Height / image.Image.Height);
imageTransform.Translate(dest.X, dest.Y);
imageTransform.Append(trans);
imageTransform.Invert();
Geometry imageClip = Utility.TransformGeometry(clip, imageTransform);
// Clip the image to clip bounds. ImageProxy.GetClippedImage has no effect if clipping
// bounds are almost image size.
Rect clippedImageBounds;
BitmapSource clippedImageSource = image.GetClippedImage(imageClip.Bounds, out clippedImageBounds);
if (clippedImageSource == null)
{
// image has been clipped away
return;
}
ImageProxy clippedImage = new ImageProxy(clippedImageSource);
// adjust destination rectangle to new clipped image bounds
double scaleX = dest.Width / image.Image.Width;
double scaleY = dest.Height / image.Image.Height;
dest = new Rect(
clippedImageBounds.X * scaleX + dest.X,
clippedImageBounds.Y * scaleY + dest.Y,
clippedImageBounds.Width * scaleX,
clippedImageBounds.Height * scaleY
);
image = clippedImage;
}
image.BlendOverColor(Colors.White, 1.0, false);
// BitmapSource img = image.GetImage();
if (clip != null)
{
_dc.PushClip(clip);
}
if (!trans.IsIdentity)
{
_dc.PushTransform(trans);
}
#if DEBUG
_seq++;
_dc.Comment("-> DrawImage " + _seq);
#endif
_dc.DrawImage(image.Image, image.Buffer, dest);
#if DEBUG
_dc.Comment("<- DrawImage " + _seq);
if (Configuration.Verbose >= 2)
{
Console.WriteLine(" DrawImage(" + _comment + ")");
}
#endif
if (!trans.IsIdentity)
{
_dc.PopTransform();
}
if (clip != null)
{
_dc.PopClip();
}
}
// Recursive
// _brush must be in world space
private void FillGeometry(
PrimitiveInfo topPI,
Geometry cur,
string desp,
Geometry curAlt,
string despAlt,
int start,
Geometry inter,
Geometry topBounds
)
{
Primitive p = topPI.primitive;
Geometry diff = Utility.Exclude(cur, topBounds, Matrix.Identity);
if (diff != null)
{
// Render cur [- topBounds] using original brush
if (_disjoint)
{
#if DEBUG
FillGeometry(diff, Oper(desp, '-', topPI.id), null, null, start + 1);
#else
FillGeometry(diff, null, null, null, start + 1);
#endif
}
else
{
// Only diff = cur - topBounds need to be rendered. But it may generate more
// complicated path and gaps between objects
if (curAlt != null)
{
#if DEBUG
FillGeometry(diff, Oper(desp, '-', topPI.id), curAlt, despAlt, start + 1);
#else
FillGeometry(diff, null, curAlt, despAlt, start + 1);
#endif
}
else
{
#if DEBUG
FillGeometry(diff, Oper(desp, '-', topPI.id), cur, desp, start + 1);
#else
FillGeometry(diff, null, cur, desp, start + 1);
#endif
}
}
}
//if (_disjoint || ! p.IsOpaque)
{
if (topPI.primitive is ImagePrimitive)
{
// If primitve on the top is ImagePrimitive, change it to DrawImage with blended image.
// An alternative will be generating an image brush
ImagePrimitive ip = topPI.primitive as ImagePrimitive;
bool empty;
double imageWidth = ip.Image.Image.Width;
double imageHeight = ip.Image.Image.Height;
// Get clip in world space.
Geometry clip = Utility.Intersect(inter, Utility.TransformGeometry(new RectangleGeometry(ip.DstRect), ip.Transform), ip.Transform, out empty);
if (!empty)
{
// Get clip bounds in image space.
Geometry clipImageSpace = Utility.TransformGeometry(clip, ReverseMap(ip.Transform, ip.DstRect, imageWidth, imageHeight));
Rect drawBounds = clipImageSpace.Bounds;
// Clip image data to the intersection. Resulting draw bounds are in image space.
BitmapSource clippedImage = ip.Image.GetClippedImage(drawBounds, out drawBounds);
if (clippedImage != null)
{
// Transform draw bounds back to world space.
drawBounds.Scale(ip.DstRect.Width / imageWidth, ip.DstRect.Height / imageHeight);
drawBounds.Offset(ip.DstRect.Left, ip.DstRect.Top);
ImageProxy image = new ImageProxy(clippedImage);
// Blend image with other brush, then render composited image.
image.BlendOverBrush(false, _brush, ReverseMap(ip.Transform, drawBounds, image.PixelWidth, image.PixelHeight));
#if DEBUG
RenderImage(image, drawBounds, clip, true, start + 1, ip.Transform, Oper(desp, '*', topPI.id));
#else
RenderImage(image, drawBounds, clip, true, start + 1, ip.Transform, null);
#endif
}
}
}
else
{
// -- If top primitive opaque, skip the intersection
// -- If current primitive is completely covered by an opaque object, skip the intersection
if (p.IsOpaque) // && Utility.Covers(topBounds, cur))
{
cur = null;
}
else
{
// Render the intersection using blended brush
BrushProxy oldbrush = _brush;
_brush = p.BlendBrush(_brush);
#if DEBUG
FillGeometry(inter, Oper(desp, '*', topPI.id), null, null, start + 1);
#else
FillGeometry(inter, null, null, null, start + 1);
#endif
_brush = oldbrush;
}
}
if (cur != null)
{
bool empty;
Geometry geo = Utility.Intersect(cur, _clip, Matrix.Identity, out empty);
if (geo != null)
{
topPI.primitive.Exclude(geo); // exclude cur & _clip
#if DEBUG
topPI.id = Oper(topPI.id, '-', Oper(desp, '*', Oper(desp, '.', "c")));
#endif
}
}
}
}
private void RenderImage(
ImageProxy image,
Rect dest,
Geometry bounds,
bool clipToBounds,
int start,
Matrix trans,
string desp
)
{
PrimitiveInfo topPI;
Geometry topBounds;
Geometry inter;
if (FindIntersection(bounds, ref start, out topPI, out topBounds, out inter))
{
Primitive p = topPI.primitive;
Geometry diff = Utility.Exclude(bounds, topBounds, trans);
// DrawImage may modify image
ImageProxy imageBlend = new ImageProxy(image.GetImage());
if (diff != null)
{
// Render cur - top
#if DEBUG
RenderImage(image, dest, diff, true, start + 1, trans, Oper(desp, '-', topPI.id));
#else
RenderImage(image, dest, diff, true, start + 1, trans, null);
#endif
}
if (!p.IsTransparent)
{
#if DEBUG
topPI.id = Oper(topPI.id, '-', Oper(desp, '.', "bounds"));
#endif
// Render the intersection using blended image
p.BlendOverImage(imageBlend, ReverseMap(trans, dest, imageBlend.PixelWidth, imageBlend.PixelHeight));
#if DEBUG
RenderImage(imageBlend, dest, inter, true, start + 1, trans, Oper(desp, '*', topPI.id));
#else
RenderImage(imageBlend, dest, inter, true, start + 1, trans, null);
#endif
}
p.Exclude(bounds);
}
else
{
Geometry clip = _clip;
bool empty = false;
if (clipToBounds)
{
clip = Utility.Intersect(clip, bounds, Matrix.Identity, out empty);
}
if (!empty)
{
_dc.Comment(desp);
_dc.DrawImage(image, dest, clip, trans);
}
}
}