public BitmapBounds(System.Numerics.Matrix3x2 srcXform, float srcW, float srcH)
{
var a = srcXform.Translation;
var b = XY.Transform(new XY(srcW, 0), srcXform);
var c = XY.Transform(new XY(srcW, srcH), srcXform);
var d = XY.Transform(new XY(0, srcH), srcXform);
var min = XY.Min(XY.Min(XY.Min(a, b), c), d);
var max = XY.Max(XY.Max(XY.Max(a, b), c), d);
this.X = (int)min.X;
this.Y = (int)min.Y;
this.Width = (int)max.X + 1 - this.X;
this.Height = (int)max.Y + 1 - this.Y;
}
private void PushSprite(Texture2D texture, Vector2 destination, Vector2 destinationSize, Color color,
Vector2 origin, float rotation, float depth, byte effects)
{
// out of space, flush
if (_numSprites >= MAX_SPRITES)
{
FlushBatch();
}
if (!_shouldIgnoreRoundingDestinations && ShouldRoundDestinations)
{
destination.X = Mathf.Round(destination.X);
destination.Y = Mathf.Round(destination.Y);
}
// Source/Destination/Origin Calculations
var source = Vector2.Zero;
var sourceSize = Vector2.One;
var tOrigin = origin * (Vector2.One / texture.Bounds.Size.ToSimd());
destinationSize *= texture.Bounds.Size.ToSimd();
// Rotation Calculations
var matrix = System.Numerics.Matrix3x2.Identity;
if (!Mathf.WithinEpsilon(rotation))
{
matrix = System.Numerics.Matrix3x2.CreateRotation(rotation);
}
matrix.Translation = destination;
// calculate vertices
// top-left
var corner = -tOrigin * destinationSize;
var result = Vector2.Transform(corner, matrix);
_vertexInfo[_numSprites].Position0 = new System.Numerics.Vector3(result, depth);
// top-right
corner = (_cornerOffset[1] - tOrigin) * destinationSize;
result = Vector2.Transform(corner, matrix);
_vertexInfo[_numSprites].Position1 = new System.Numerics.Vector3(result, depth);
// bottom-left
corner = (_cornerOffset[2] - tOrigin) * destinationSize;
result = Vector2.Transform(corner, matrix);
_vertexInfo[_numSprites].Position2 = new System.Numerics.Vector3(result, depth);
// bottom-right
corner = (_cornerOffset[3] - tOrigin) * destinationSize;
result = Vector2.Transform(corner, matrix);
_vertexInfo[_numSprites].Position3 = new System.Numerics.Vector3(result, depth);
_vertexInfo[_numSprites].TextureCoordinate0 = (_cornerOffset[0 ^ effects] * sourceSize) + source;
_vertexInfo[_numSprites].TextureCoordinate1 = (_cornerOffset[1 ^ effects] * sourceSize) + source;
_vertexInfo[_numSprites].TextureCoordinate2 = (_cornerOffset[2 ^ effects] * sourceSize) + source;
_vertexInfo[_numSprites].TextureCoordinate3 = (_cornerOffset[3 ^ effects] * sourceSize) + source;
_vertexInfo[_numSprites].Color0 = color;
_vertexInfo[_numSprites].Color1 = color;
_vertexInfo[_numSprites].Color2 = color;
_vertexInfo[_numSprites].Color3 = color;
if (_disableBatching)
{
_vertexBuffer.SetData(0, _vertexInfo, 0, 1, VertexPositionColorTexture4.RealStride,
SetDataOptions.None);
DrawPrimitives(texture, 0, 1);
}
else
{
_textureInfo[_numSprites] = texture;
_numSprites += 1;
}
}
