internal static void Draw()
{
mRender.BeginDraw(Canvas);
mRender.Clear(Canvas, new Colorf(1, 1, 1, 1));
foreach (var group in Groups)
{
group.Value.Draw(mRender);
}
mRender.EndDraw();
}
protected internal override void Excute(List <GameObject> passedGameObjectList)
{
//solve to render debug property
void renderDebugPropertySolver(GuiRender render, Shape shape)
{
if (GuiRenderDebugProperty != null && GuiRenderDebugProperty.ShapeProperty != null)
{
var padding = GuiRenderDebugProperty.ShapeProperty.Padding;
switch (shape)
{
case RectangleShape rectangle:
//draw debug shape
render.DrawRectangle(
rectangle: new Rectangle <float>(
left: -padding,
top: -padding,
right: rectangle.Size.Width + padding,
bottom: rectangle.Size.Height + padding),
color: GuiRenderDebugProperty.ShapeProperty.Color,
padding: GuiRenderDebugProperty.ShapeProperty.Padding);
break;
default: break;
}
}
}
//solve to render text component
void textGuiComponentSolver(GuiRender render, TextGuiComponent textComponent)
{
//update the property and create asset(Text)
textComponent.SetPropertyToAsset();
//not invisable text, we will render it
if (textComponent.mTextAsset.Image.GpuTexture != null)
{
render.DrawText(new Position <float>(), textComponent.mTextAsset, textComponent.Color);
}
}
//solve to render rectangle compoent
void rectangleComponentSolver(GuiRender render, RectangleGuiComponent rectangleComponent)
{
//get size of rectangle
var size = (rectangleComponent.Shape as RectangleShape).Size;
//swtich render mode
switch (rectangleComponent.RenderMode)
{
case GuiRenderMode.WireFrame:
render.DrawRectangle(
rectangle: new Rectangle <float>(0, 0, size.Width, size.Height),
color: rectangleComponent.Color,
padding: rectangleComponent.Padding);
break;
case GuiRenderMode.Solid:
render.FillRectangle(
rectangle: new Rectangle <float>(0, 0, size.Width, size.Height),
color: rectangleComponent.Color);
break;
default: break;
}
}
//solve to render image component
void imageComponentSolver(GuiRender render, ImageGuiComponent imageComponent)
{
var size = (imageComponent.Shape as RectangleShape).Size;
//draw image
render.DrawImage(new Rectangle <float>(
left: 0, top: 0, right: size.Width, bottom: size.Height),
image: imageComponent.Image,
opacity: imageComponent.Opacity);
}
//solve to render button component
void buttonComponentSolver(GuiRender render, ButtonGuiComponent buttonComponent)
{
//update the property and create asset(text)
buttonComponent.SetPropertyToAsset();
//get size of rectangle
var size = (buttonComponent.Shape as RectangleShape).Size;
//get position of button text
var position = new Position <float>(
x: (size.Width - buttonComponent.mTextAsset.Size.Width) * 0.5f,
y: (size.Height - buttonComponent.mTextAsset.Size.Height) * 0.5f);
//render button shape
render.FillRectangle(
new Rectangle <float>(0, 0, size.Width, size.Height),
buttonComponent.Background);
//render button text
if (buttonComponent.mTextAsset.Image.GpuTexture != null)
{
render.DrawText(position, buttonComponent.mTextAsset, buttonComponent.Frontground);
}
}
//solve to render input text component
void inputTextComponentSolver(GuiRender render, InputTextGuiComponent inputTextComponent)
{
//update the property and create asset(input text)
inputTextComponent.SetPropertyToAsset();
var size = (inputTextComponent.Shape as RectangleShape).Size;
var cursorLocation = inputTextComponent.CursorLocation;
var inputTextPosition = new Position <float>(
x: 0 + GuiProperty.InputTextPadding,
y: 0 + GuiProperty.InputTextPadding);
var cursorPosition = new Position <float>(
x: inputTextPosition.X + (cursorLocation == 0 ? 0 : inputTextComponent.mInputText.GetCharacterPostLocation(cursorLocation - 1)),
y: inputTextPosition.Y);
//render background box
render.FillRectangle(
new Rectangle <float>(0, 0, size.Width, size.Height),
inputTextComponent.Background);
//render input text
if (inputTextComponent.mInputText.Image.GpuTexture != null)
{
render.DrawText(inputTextPosition, inputTextComponent.mInputText, inputTextComponent.Frontground);
}
//render cursor
render.DrawLine(
start: cursorPosition,
end: new Position <float>(cursorPosition.X, size.Height - GuiProperty.InputTextPadding),
color: inputTextComponent.Frontground,
padding: GuiProperty.InputTextCursorWidth);
}
//stack to maintain the path of game object's tree from node to root
//matrix is the transform from root to node
//bool is the visable status sum(operator &) from root to node
Stack <Tuple <GameObject, Matrix4x4> > transformStack = new Stack <Tuple <GameObject, Matrix4x4> >();
//add virtual root to stack
transformStack.Push(new Tuple <GameObject, Matrix4x4>(null, Matrix4x4.Identity));
//visual component solver
mRender.BeginDraw(mCanvas);
mRender.Clear(mCanvas, new Color <float>(1, 1, 1, 1));
foreach (var gameObject in passedGameObjectList)
{
//maintain the elments in the stack are ancestors from root to node(with deep order, first element is root)
//because the list of game objects is the dfs order of tree
while (transformStack.Count != 1 && transformStack.Peek().Item1 != gameObject.Parent)
{
transformStack.Pop();
}
//get current transform matrix, it is the result of root to node's transform matrix
var transformComponent = gameObject.GetComponent <TransformGuiComponent>();
var transformMatrix = transformComponent.Transform * transformStack.Peek().Item2;
//set transform
mRender.SetTransform(transformMatrix);
switch (gameObject.GetComponent <VisualGuiComponent>())
{
case TextGuiComponent textComponent:
textGuiComponentSolver(mRender, textComponent); break;
case RectangleGuiComponent rectangleComponent:
rectangleComponentSolver(mRender, rectangleComponent); break;
case ImageGuiComponent imageComponent:
imageComponentSolver(mRender, imageComponent); break;
case ButtonGuiComponent buttonComponent:
buttonComponentSolver(mRender, buttonComponent); break;
case InputTextGuiComponent inputComponent:
inputTextComponentSolver(mRender, inputComponent); break;
default: break;
}
//draw debug shape
renderDebugPropertySolver(mRender, gameObject.GetComponent <VisualGuiComponent>().Shape);
//update stack
transformStack.Push(new Tuple <GameObject, Matrix4x4>(gameObject, transformMatrix));
}
mRender.EndDraw();
}