/// <summary>Returns the axis aligned bounding box (AABB) of the region and mesh attachments for the current pose.</summary>
/// <param name="x">The horizontal distance between the skeleton origin and the left side of the AABB.</param>
/// <param name="y">The vertical distance between the skeleton origin and the bottom side of the AABB.</param>
/// <param name="width">The width of the AABB</param>
/// <param name="height">The height of the AABB.</param>
/// <param name="vertexBuffer">Reference to hold a float[]. May be a null reference. This method will assign it a new float[] with the appropriate size as needed.</param>
public void GetBounds(out float x, out float y, out float width, out float height, ref float[] vertexBuffer)
{
float[] temp = vertexBuffer;
temp = temp ?? new float[8];
var drawOrderItems = this.drawOrder.Items;
float minX = int.MaxValue, minY = int.MaxValue, maxX = int.MinValue, maxY = int.MinValue;
for (int i = 0, n = this.drawOrder.Count; i < n; i++)
{
Slot slot = drawOrderItems[i];
int verticesLength = 0;
float[] vertices = null;
Attachment attachment = slot.attachment;
var regionAttachment = attachment as RegionAttachment;
if (regionAttachment != null)
{
verticesLength = 8;
vertices = temp;
if (vertices.Length < 8)
{
vertices = temp = new float[8];
}
regionAttachment.ComputeWorldVertices(slot.bone, temp, 0);
}
else
{
var meshAttachment = attachment as MeshAttachment;
if (meshAttachment != null)
{
MeshAttachment mesh = meshAttachment;
verticesLength = mesh.WorldVerticesLength;
vertices = temp;
if (vertices.Length < verticesLength)
{
vertices = temp = new float[verticesLength];
}
mesh.ComputeWorldVertices(slot, 0, verticesLength, temp, 0);
}
}
if (vertices != null)
{
for (int ii = 0; ii < verticesLength; ii += 2)
{
float vx = vertices[ii], vy = vertices[ii + 1];
minX = Math.Min(minX, vx);
minY = Math.Min(minY, vy);
maxX = Math.Max(maxX, vx);
maxY = Math.Max(maxY, vy);
}
}
}
x = minX;
y = minY;
width = maxX - minX;
height = maxY - minY;
vertexBuffer = temp;
}
public void Draw(Skeleton skeleton)
{
var drawOrder = skeleton.DrawOrder;
var drawOrderItems = skeleton.DrawOrder.Items;
float skeletonR = skeleton.R, skeletonG = skeleton.G, skeletonB = skeleton.B, skeletonA = skeleton.A;
Color color = new Color();
for (int i = 0, n = drawOrder.Count; i < n; i++)
{
Slot slot = drawOrderItems[i];
Attachment attachment = slot.Attachment;
float attachmentColorR, attachmentColorG, attachmentColorB, attachmentColorA;
Texture2D texture = null;
int verticesCount = 0;
float[] vertices = this.vertices;
int indicesCount = 0;
int[] indices = null;
float[] uvs = null;
if (attachment is RegionAttachment)
{
RegionAttachment regionAttachment = (RegionAttachment)attachment;
attachmentColorR = regionAttachment.R; attachmentColorG = regionAttachment.G; attachmentColorB = regionAttachment.B; attachmentColorA = regionAttachment.A;
AtlasRegion region = (AtlasRegion)regionAttachment.RendererObject;
texture = (Texture2D)region.page.rendererObject;
verticesCount = 4;
regionAttachment.ComputeWorldVertices(slot.Bone, vertices, 0, 2);
indicesCount = 6;
indices = quadTriangles;
uvs = regionAttachment.UVs;
}
else if (attachment is MeshAttachment)
{
MeshAttachment mesh = (MeshAttachment)attachment;
attachmentColorR = mesh.R; attachmentColorG = mesh.G; attachmentColorB = mesh.B; attachmentColorA = mesh.A;
AtlasRegion region = (AtlasRegion)mesh.RendererObject;
texture = (Texture2D)region.page.rendererObject;
int vertexCount = mesh.WorldVerticesLength;
if (vertices.Length < vertexCount)
{
vertices = new float[vertexCount];
}
verticesCount = vertexCount >> 1;
mesh.ComputeWorldVertices(slot, vertices);
indicesCount = mesh.Triangles.Length;
indices = mesh.Triangles;
uvs = mesh.UVs;
}
else if (attachment is ClippingAttachment)
{
ClippingAttachment clip = (ClippingAttachment)attachment;
clipper.ClipStart(slot, clip);
continue;
}
else
{
continue;
}
// set blend state
BlendState blendState = new BlendState();
Blend blendSrc;
Blend blendDst;
if (premultipliedAlpha)
{
blendState.AlphaBlendFunction = BlendState.AlphaBlend.AlphaBlendFunction;
blendState.BlendFactor = BlendState.AlphaBlend.BlendFactor;
blendState.ColorBlendFunction = BlendState.AlphaBlend.ColorBlendFunction;
blendState.ColorWriteChannels = BlendState.AlphaBlend.ColorWriteChannels;
blendState.ColorWriteChannels1 = BlendState.AlphaBlend.ColorWriteChannels1;
blendState.ColorWriteChannels2 = BlendState.AlphaBlend.ColorWriteChannels2;
blendState.ColorWriteChannels3 = BlendState.AlphaBlend.ColorWriteChannels3;
blendState.MultiSampleMask = BlendState.AlphaBlend.MultiSampleMask;
}
else
{
blendState.AlphaBlendFunction = BlendState.NonPremultiplied.AlphaBlendFunction;
blendState.BlendFactor = BlendState.NonPremultiplied.BlendFactor;
blendState.ColorBlendFunction = BlendState.NonPremultiplied.ColorBlendFunction;
blendState.ColorWriteChannels = BlendState.NonPremultiplied.ColorWriteChannels;
blendState.ColorWriteChannels1 = BlendState.NonPremultiplied.ColorWriteChannels1;
blendState.ColorWriteChannels2 = BlendState.NonPremultiplied.ColorWriteChannels2;
blendState.ColorWriteChannels3 = BlendState.NonPremultiplied.ColorWriteChannels3;
blendState.MultiSampleMask = BlendState.NonPremultiplied.MultiSampleMask;
}
switch (slot.Data.BlendMode)
{
case BlendMode.Additive:
blendState = BlendState.Additive;
break;
case BlendMode.Multiply:
blendSrc = BlendXna.GetXNABlend(BlendXna.GL_DST_COLOR);
blendDst = BlendXna.GetXNABlend(BlendXna.GL_ONE_MINUS_SRC_ALPHA);
blendState.ColorSourceBlend = blendSrc;
blendState.AlphaSourceBlend = blendSrc;
blendState.ColorDestinationBlend = blendDst;
blendState.AlphaDestinationBlend = blendDst;
break;
case BlendMode.Screen:
blendSrc = BlendXna.GetXNABlend(premultipliedAlpha ? BlendXna.GL_ONE : BlendXna.GL_SRC_ALPHA);
blendDst = BlendXna.GetXNABlend(BlendXna.GL_ONE_MINUS_SRC_COLOR);
blendState.ColorSourceBlend = blendSrc;
blendState.AlphaSourceBlend = blendSrc;
blendState.ColorDestinationBlend = blendDst;
blendState.AlphaDestinationBlend = blendDst;
break;
default:
blendState = defaultBlendState;
break;
}
if (device.BlendState != blendState)
{
End();
device.BlendState = blendState;
}
// calculate color
float a = skeletonA * slot.A * attachmentColorA;
if (premultipliedAlpha)
{
color = new Color(
skeletonR * slot.R * attachmentColorR * a,
skeletonG * slot.G * attachmentColorG * a,
skeletonB * slot.B * attachmentColorB * a, a);
}
else
{
color = new Color(
skeletonR * slot.R * attachmentColorR,
skeletonG * slot.G * attachmentColorG,
skeletonB * slot.B * attachmentColorB, a);
}
Color darkColor = new Color();
if (slot.HasSecondColor)
{
if (premultipliedAlpha)
{
darkColor = new Color(slot.R2 * a, slot.G2 * a, slot.B2 * a);
}
else
{
darkColor = new Color(slot.R2 * a, slot.G2 * a, slot.B2 * a);
}
}
darkColor.A = premultipliedAlpha ? (byte)255 : (byte)0;
// clip
if (clipper.IsClipping)
{
clipper.ClipTriangles(vertices, verticesCount << 1, indices, indicesCount, uvs);
vertices = clipper.ClippedVertices.Items;
verticesCount = clipper.ClippedVertices.Count >> 1;
indices = clipper.ClippedTriangles.Items;
indicesCount = clipper.ClippedTriangles.Count;
uvs = clipper.ClippedUVs.Items;
}
if (verticesCount == 0 || indicesCount == 0)
{
continue;
}
// submit to batch
MeshItem item = batcher.NextItem(verticesCount, indicesCount);
item.texture = texture;
for (int ii = 0, nn = indicesCount; ii < nn; ii++)
{
item.triangles[ii] = indices[ii];
}
VertexPositionColorTextureColor[] itemVertices = item.vertices;
for (int ii = 0, v = 0, nn = verticesCount << 1; v < nn; ii++, v += 2)
{
itemVertices[ii].Color = color;
itemVertices[ii].Color2 = darkColor;
itemVertices[ii].Position.X = vertices[v];
itemVertices[ii].Position.Y = vertices[v + 1];
itemVertices[ii].Position.Z = 0;
itemVertices[ii].TextureCoordinate.X = uvs[v];
itemVertices[ii].TextureCoordinate.Y = uvs[v + 1];
}
clipper.ClipEnd(slot);
}
clipper.ClipEnd();
}