public byte[] GetSpriteFromAtlas(UISpriteData es)
{
if (m_tet2dAtlasImage == null)
{
return(null);
}
m_iWidthMin = Mathf.Clamp(es.x, 0, m_iAtlasImageWidth);
m_iHeightMin = Mathf.Clamp(es.y, 0, m_iAtlasImageHeight);
m_iWidthMax = Mathf.Min(m_iWidthMin + es.width, m_iAtlasImageWidth - 1);
m_iHeightMax = Mathf.Min(m_iHeightMin + es.height, m_iAtlasImageHeight - 1);
m_iNewWidth = Mathf.Clamp(es.width, 0, m_iAtlasImageWidth);
m_iNewHeight = Mathf.Clamp(es.height, 0, m_iAtlasImageHeight);
if (m_iNewWidth == 0 || m_iNewHeight == 0)
{
return(null);
}
m_c32arrNewPixels = new Color32[m_iNewWidth * m_iNewHeight];
for (int y = 0; y < m_iNewHeight; ++y)
{
m_iCopyHeight = m_iHeightMin + y;
if (m_iCopyHeight > m_iHeightMax)
{
m_iCopyHeight = m_iHeightMax;
}
for (int x = 0; x < m_iNewWidth; ++x)
{
m_iCopyWidth = m_iWidthMin + x;
if (m_iCopyWidth > m_iWidthMax)
{
m_iCopyWidth = m_iWidthMax;
}
int newIndex = (m_iNewHeight - 1 - y) * m_iNewWidth + x;
int oldIndex = (m_iAtlasImageHeight - 1 - m_iCopyHeight) * m_iAtlasImageWidth + m_iCopyWidth;
m_c32arrNewPixels[newIndex] = m_carrAtlasImage[oldIndex];
}
}
m_spriteEntry = new UIAtlasMaker.SpriteEntry();
m_spriteEntry.CopyFrom(es);
m_spriteEntry.SetRect(0, 0, m_iNewWidth, m_iNewHeight);
m_spriteEntry.temporaryTexture = true;
m_spriteEntry.tex = new Texture2D(m_iNewWidth, m_iNewHeight);
m_spriteEntry.tex.SetPixels32(m_c32arrNewPixels);
m_spriteEntry.tex.Apply();
m_c32arrNewPixels = null;
return(m_spriteEntry.tex.EncodeToPNG());
}
/// <summary>
/// 从图集纹理中分解特定的sprite
/// </summary>
SpriteEntry ExtractSprite(UISpriteData es, Color32[] oldPixels, int oldWidth, int oldHeight)
{
int xmin = Mathf.Clamp(es.x, 0, oldWidth);
int ymin = Mathf.Clamp(es.y, 0, oldHeight);
int xmax = Mathf.Min(xmin + es.width, oldWidth - 1);
int ymax = Mathf.Min(ymin + es.height, oldHeight - 1);
int newWidth = Mathf.Clamp(es.width, 0, oldWidth);
int newHeight = Mathf.Clamp(es.height, 0, oldHeight);
if (newWidth == 0 || newHeight == 0)
{
return(null);
}
Color32[] newPixels = new Color32[newWidth * newHeight];
for (int y = 0; y < newHeight; ++y)
{
int cy = ymin + y;
if (cy > ymax)
{
cy = ymax;
}
for (int x = 0; x < newWidth; ++x)
{
int cx = xmin + x;
if (cx > xmax)
{
cx = xmax;
}
int newIndex = (newHeight - 1 - y) * newWidth + x;
int oldIndex = (oldHeight - 1 - cy) * oldWidth + cx;
newPixels[newIndex] = oldPixels[oldIndex];
}
}
// Create a new sprite
SpriteEntry sprite = new SpriteEntry();
sprite.CopyFrom(es);
sprite.SetRect(0, 0, newWidth, newHeight);
sprite.SetTexture(newPixels, newWidth, newHeight);
return(sprite);
}