internal void InternalDraw(Texture2D texture, Vector2 position,
Rectangle?sourceRectangle, Color color, float rotation, Vector2 origin,
Vector2 scale, SpriteEffects effects, float layerDepth)
{
byte r, g, b, a;
switch (fixedBlendState)
{
default:
case FixedBlendState.AlphaBlend: // One, 1-SrcAlpha
r = color.cR;
g = color.cG;
b = color.cB;
a = color.A;
// TODO: Emit warning if premultiplied R,G or B is greater than A.
// This would normally cause additive blending. Currently not handled by ExEnSilver.
break;
case FixedBlendState.NonPremultiplied: // SrcAlpha, 1-SrcAlpha
r = color.R;
g = color.G;
b = color.B;
a = color.A;
break;
case FixedBlendState.Additive: // SrcAlpha, One
r = color.R;
g = color.G;
b = color.B;
a = color.A;
break;
case FixedBlendState.Opaque: // One, Zero
r = color.R;
g = color.G;
b = color.B;
a = 255;
break;
}
if (a == 0) // Nothing to draw
{
return;
}
// Dynamic rectangle only used if there's actually a source rectangle!
bool dynamicRectangle = hintDynamicRectangle && sourceRectangle.HasValue;
ImageSourceId id = new ImageSourceId(r, g, b, sourceRectangle, tintEffectMode,
hintUseCache, hintDynamicColor, dynamicRectangle);
ImageSprite sprite = texture.GetSprite(id);
if (hintDynamicColor)
{
sprite.UpdateDynamicColor(r, g, b);
}
if (dynamicRectangle)
{
sprite.UpdateDynamicRectangle(sourceRectangle.Value);
}
Vector2 sourceSize = sourceRectangle.HasValue ?
new Vector2(sourceRectangle.Value.Width, sourceRectangle.Value.Height) :
new Vector2(texture.Width, texture.Height);
Vector2 sourceOrigin = dynamicRectangle ?
new Vector2(sourceRectangle.Value.X, sourceRectangle.Value.Y) :
Vector2.Zero;
sprite.Transform(position, scale, origin, sourceOrigin, sourceSize, rotation, effects, ref currentMatrix);
sprite.SetOpacity(a / 255f);
GraphicsDevice.DrawSprite(sprite);
}