protected internal override void Draw(GuiRender render)
{
var padding = 2.0f;
var cursorHeight = FontSize * 0.9f;
var textPosition = new Point2f(padding * 2, Utility.Center(Size.Height, mTextBuffer.Size.Height));
var cursorPosition = new Point2f(textPosition.X + (
Cursor == 0 ? 0 : mTextBuffer.GetCharacterPostLocation(Cursor - 1)), Utility.Center(Size.Height, cursorHeight));
var area = new Rectanglef(0, 0, Size.Width, Size.Height);
render.FillRectangle(area, Style.Background);
render.DrawRectangle(area, Style.Padding, padding);
render.DrawText(textPosition, mTextBuffer, Style.Text);
if (mPassTime < HalfDuration || Gui.GlobalElementStatus.FocusElement != this)
{
return;
}
render.DrawLine(cursorPosition, cursorPosition + new Vector2f(0, cursorHeight), Style.Cursor, padding);
}
private void DrawImage(Rectanglef rectangle, Image image, Colorf color, GuiRenderMode mode)
{
//fill rectangle with texture
//the result color's alpha is equal texture.alpha * opacity
//do not render image
if (image.GpuTexture == null)
{
return;
}
var transform = new GuiTransform();
var renderConfig = new GuiRenderConfig()
{
Color = color, Config = new Vector4((int)mode)
};
//1.scale the rectangle
transform.World = Matrix4x4.CreateScale(rectangle.Right - rectangle.Left, rectangle.Bottom - rectangle.Top, 1.0f);
//2.translate it
transform.World *= Matrix4x4.CreateTranslation(rectangle.Left, rectangle.Top, 0.0f);
//3.keep transform matrix data
transform.World *= Transform;
//set projection matrix
transform.Project = mProject;
mTransformBuffer.Update(transform);
mRenderConfigBuffer.Update(renderConfig);
mDevice.SetVertexBuffer(mSquareVertexBuffer);
mDevice.SetIndexBuffer(mSquareIndexBuffer);
mDevice.SetBuffer(mTransformBuffer, mTransformBufferSlot, GpuShaderType.All);
mDevice.SetBuffer(mRenderConfigBuffer, mRenderConfigBufferSlot, GpuShaderType.All);
mDevice.SetResourceUsage(image.GpuResourceUsage, mTextureSlot, GpuShaderType.All);
mDevice.DrawIndexed(6, 0, 0);
}
public virtual void DrawText(Rectanglef rectangle, Text text, Colorf color)
{
DrawImage(rectangle, text.Image, color, GuiRenderMode.Text);
}
public virtual void DrawImage(Rectanglef rectangle, Image image, float opacity = 1.0f)
{
DrawImage(rectangle, image, new Colorf(1.0f, 1.0f, 1.0f, opacity));
}
public virtual void DrawImage(Rectanglef rectangle, Image image, Colorf color)
{
DrawImage(rectangle, image, color, GuiRenderMode.Image);
}
public virtual void DrawRectangle(Rectanglef rectangle, Colorf color, float padding = 2.0f)
{
//draw rectangle with color
//padding means the width of edge
//color.Alpha means the opacity of edge
//read rectangle data
var outSide = rectangle;
//inside rectangle will smaller than outside
var inSide = new Rectanglef(
outSide.Left + padding,
outSide.Top + padding,
outSide.Right - padding,
outSide.Bottom - padding);
//first, we need compute the vertex buffer for our rectangle
//we do not need tex coord of vertex
//we can compute the index buffer at init the render
GuiVertex[] vertics = new GuiVertex[]
{
new GuiVertex()
{
Position = new Vector3f(outSide.Left, outSide.Top, 0)
},
new GuiVertex()
{
Position = new Vector3f(outSide.Right, outSide.Top, 0)
},
new GuiVertex()
{
Position = new Vector3f(outSide.Right, outSide.Bottom, 0)
},
new GuiVertex()
{
Position = new Vector3f(outSide.Left, outSide.Bottom, 0)
},
new GuiVertex()
{
Position = new Vector3f(inSide.Left, inSide.Top, 0)
},
new GuiVertex()
{
Position = new Vector3f(inSide.Right, inSide.Top, 0)
},
new GuiVertex()
{
Position = new Vector3f(inSide.Right, inSide.Bottom, 0)
},
new GuiVertex()
{
Position = new Vector3f(inSide.Left, inSide.Bottom, 0)
}
};
//update vertex buffer
mRectangleVertexBuffer.Update(vertics);
//second, update constant buffer
var transform = new GuiTransform()
{
World = Transform, Project = mProject
};
var renderConfig = new GuiRenderConfig()
{
Color = color, Config = new Vector4(0)
};
mTransformBuffer.Update(transform);
mRenderConfigBuffer.Update(renderConfig);
//set buffer and shader
mDevice.SetVertexBuffer(mRectangleVertexBuffer);
mDevice.SetIndexBuffer(mRectangleIndexBuffer);
mDevice.SetBuffer(mTransformBuffer, mTransformBufferSlot, GpuShaderType.All);
mDevice.SetBuffer(mRenderConfigBuffer, mRenderConfigBufferSlot, GpuShaderType.All);
//draw
mDevice.DrawIndexed(24, 0, 0);
}
