public RectangleGuiComponent(RectangleShape shape, Color <float> color, GuiRenderMode renderMode, float padding = 2.0f)
: base(shape)
{
Color = color;
RenderMode = renderMode;
Padding = 2.0f;
}
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);
}
