private void Draw(DrawState state, Vector2 scale, byte clipDepth)
{
Element parent = this.parent;
Matrix matrix;
GraphicsDevice device = null;
if (parent == null)
{
if (state.DrawTarget.MultiSampleType != MultiSampleType.None)
{
device = state.BeginGetGraphicsDevice(StateFlag.None);
device.RenderState.MultiSampleAntiAlias = false;
}
this.clipTestActive = false;
DeviceRenderState rstate = new DeviceRenderState();
rstate.DepthColourCull.DepthWriteEnabled = false;
rstate.DepthColourCull.DepthTestEnabled = false;
state.PushRenderState(ref rstate);
if (camera == null)
{
camera = state.UserValues[cameraID] as Xen.Camera.Camera2D;
if (camera == null)
{
camera = new Xen.Camera.Camera2D(true);
state.UserValues[cameraID] = camera;
}
}
state.PushCamera(camera);
}
else
{
this.clipTestActive = parent.clipTestActive | parent.ClipsChildren;
}
StencilTestState stencilState = new StencilTestState();
if (clipTestActive)
{
stencilState.Enabled = true;
stencilState.ReferenceValue = clipDepth;
stencilState.StencilFunction = CompareFunction.Equal;
stencilState.StencilPassOperation = StencilOperation.Keep;
}
bool clearStencil = false;
if (this.ClipsChildren)
{
clearStencil = clipDepth == 255;
clipDepth--;
if (!clipTestActive)
{
//check there actually is a stencil buffer
#if DEBUG
DepthFormat format = state.DrawTarget.SurfaceDepthFormat ?? DepthFormat.Unknown;
if (format != DepthFormat.Depth24Stencil8)
{
throw new InvalidOperationException("ElementRect.ClipChildren requires the DrawTarget has a valid Depth Buffer with an 8bit Stencil Buffer");
}
#endif
stencilState.Enabled = true;
stencilState.ReferenceValue = clipDepth;
stencilState.StencilPassOperation = StencilOperation.Replace;
}
else
{
stencilState.StencilPassOperation = StencilOperation.Decrement;
}
}
if ((scale.X != 0 && scale.Y != 0))
{
Vector2 size = ElementSize;
GetDisplayMatrix(out matrix, scale, ref size);
state.PushWorldMatrixMultiply(ref matrix);
BindShader(state, false);
state.RenderState.AlphaBlend = blend;
state.RenderState.StencilTest = stencilState;
if (!UseSize)
{
size = new Vector2(1, 1);
}
else
if (IsNormalised)
{
size *= scale;
}
PreDraw(size);
DrawElement(state);
List <Element> children = Children;
if (children != null)
{
foreach (Element child in children)
{
if (((IDraw)child).CullTest(state))
{
child.Draw(state, size, clipDepth);
}
}
}
if (clearStencil)
{
BindShader(state, true);
stencilState = new StencilTestState();
stencilState.Enabled = true;
stencilState.StencilFunction = CompareFunction.Never;
stencilState.StencilFailOperation = StencilOperation.Zero;
state.RenderState.StencilTest = stencilState;
DrawElement(state);
}
state.PopWorldMatrix();
}
if (parent == null)
{
state.PopRenderState();
state.PopCamera();
}
if (device != null)
{
device.RenderState.MultiSampleAntiAlias = true;
state.EndGetGraphicsDevice();
}
}
private void Draw(DrawState state, Vector2 scale, byte clipDepth)
{
Element parent = this.parent;
Matrix matrix;
if (parent == null)
{
this.clipTestActive = false;
state.RenderState.Push();
state.RenderState.CurrentRasterState.MultiSampleAntiAlias = false;
state.RenderState.CurrentDepthState.DepthWriteEnabled = WriteToDepth;
state.RenderState.CurrentDepthState.DepthTestEnabled = WriteToDepth;
if (camera == null)
{
camera = state.Application.UserValues[cameraID] as Xen.Camera.Camera2D;
if (camera == null)
{
camera = new Xen.Camera.Camera2D(true);
state.Application.UserValues[cameraID] = camera;
}
}
state.Camera.Push(camera);
}
else
this.clipTestActive = parent.clipTestActive | parent.ClipsChildren;
StencilState stencilState = new StencilState();
if (clipTestActive)
{
stencilState.Enabled = true;
stencilState.ReferenceValue = clipDepth;
stencilState.StencilFunction = CompareFunction.Equal;
stencilState.StencilPassOperation = StencilOperation.Keep;
}
bool clearStencil = false;
if (this.ClipsChildren)
{
clearStencil = clipDepth == 255;
clipDepth--;
if (!clipTestActive)
{
//check there actually is a stencil buffer
#if DEBUG
DepthFormat format = state.DrawTarget.SurfaceDepthFormat;
if (format != DepthFormat.Depth24Stencil8)
throw new InvalidOperationException("ElementRect.ClipChildren requires the DrawTarget has a valid Depth Buffer with an 8bit Stencil Buffer");
#endif
stencilState.Enabled = true;
stencilState.ReferenceValue = clipDepth;
stencilState.StencilPassOperation = StencilOperation.Replace;
}
else
stencilState.StencilPassOperation = StencilOperation.Decrement;
}
if ((scale.X != 0 && scale.Y != 0))
{
Vector2 size = ElementSize;
GetDisplayMatrix(out matrix, scale, ref size);
using (state.WorldMatrix.PushMultiply(ref matrix))
{
IShader shader = BindShader(state, false);
if (shader != null)
state.Shader.Push(shader);
state.RenderState.CurrentBlendState = blend;
state.RenderState.CurrentStencilState = stencilState;
if (!UseSize)
size = new Vector2(1, 1);
else
if (IsNormalised)
size *= scale;
PreDraw(size);
DrawElement(state);
List<Element> children = Children;
if (children != null)
foreach (Element child in children)
if (((IDraw)child).CullTest(state))
child.Draw(state, size, clipDepth);
if (shader != null)
state.Shader.Pop();
if (clearStencil)
{
shader = BindShader(state, true);
if (shader != null)
state.Shader.Push(shader);
stencilState = new StencilState();
stencilState.Enabled = true;
stencilState.StencilFunction = CompareFunction.Never;
stencilState.StencilFailOperation = StencilOperation.Zero;
state.RenderState.CurrentStencilState = stencilState;
DrawElement(state);
if (shader != null)
state.Shader.Pop();
}
}
}
if (parent == null)
{
state.RenderState.Pop();
state.Camera.Pop();
}
}