// --- extract clip region ---
/// <summary>Extracts a clip region from a texture.</summary>
/// <param name="texture">The original texture.</param>
/// <param name="region">The clip region, or a null reference.</param>
/// <returns>The texture with the extracted clip region.</returns>
/// <exception cref="System.ArgumentException">Raised when the clip region is outside the texture bounds.</exception>
/// <exception cref="System.NotSupportedException">Raised when the number of bits per pixel in the texture is not supported.</exception>
internal static Texture ExtractClipRegion(Texture texture, TextureClipRegion region)
{
if (region == null || region.Left == 0 && region.Top == 0 && region.Width == texture.Width && region.Height == texture.Height)
{
return(texture);
}
if (region.Left < 0 || region.Top < 0 || region.Width <= 0 || region.Height <= 0 || region.Left + region.Width > texture.Width || region.Top + region.Height > texture.Height)
{
throw new ArgumentException();
}
if (texture.BitsPerPixel == 24 | texture.BitsPerPixel == 32)
{
int width = texture.Width;
int height = texture.Height;
byte[] bytes = texture.Bytes;
int clipLeft = region.Left;
int clipTop = region.Top;
int clipWidth = region.Width;
int clipHeight = region.Height;
if (texture.BitsPerPixel == 24)
{
byte[] newBytes = new byte[3 * clipWidth * clipHeight];
int i = 0;
for (int y = 0; y < clipHeight; y++)
{
int j = 3 * width * (clipTop + y) + 3 * clipLeft;
for (int x = 0; x < clipWidth; x++)
{
newBytes[i + 0] = bytes[j + 0];
newBytes[i + 1] = bytes[j + 1];
newBytes[i + 2] = bytes[j + 2];
i += 3;
j += 3;
}
}
return(new Texture(clipWidth, clipHeight, 24, newBytes));
}
else
{
byte[] newBytes = new byte[4 * clipWidth * clipHeight];
int i = 0;
for (int y = 0; y < clipHeight; y++)
{
int j = 4 * width * (clipTop + y) + 4 * clipLeft;
for (int x = 0; x < clipWidth; x++)
{
newBytes[i + 0] = bytes[j + 0];
newBytes[i + 1] = bytes[j + 1];
newBytes[i + 2] = bytes[j + 2];
newBytes[i + 3] = bytes[j + 3];
i += 4;
j += 4;
}
}
return(new Texture(clipWidth, clipHeight, 32, newBytes));
}
}
throw new NotSupportedException();
}
// --- extract clip region ---
/// <summary>Extracts a clip region from a texture.</summary>
/// <param name="texture">The original texture.</param>
/// <param name="region">The clip region, or a null reference.</param>
/// <returns>The texture with the extracted clip region.</returns>
/// <exception cref="System.ArgumentException">Raised when the clip region is outside the texture bounds.</exception>
/// <exception cref="System.NotSupportedException">Raised when the number of bits per pixel in the texture is not supported.</exception>
internal static Texture ExtractClipRegion(Texture texture, TextureClipRegion region)
{
if (region == null || region.Left == 0 && region.Top == 0 && region.Width == texture.Width && region.Height == texture.Height) {
return texture;
}
if (region.Left < 0 || region.Top < 0 || region.Width <= 0 || region.Height <= 0 || region.Left + region.Width > texture.Width || region.Top + region.Height > texture.Height) {
throw new ArgumentException();
}
if (texture.BitsPerPixel == 24 | texture.BitsPerPixel == 32) {
int width = texture.Width;
int height = texture.Height;
byte[] bytes = texture.Bytes;
int clipLeft = region.Left;
int clipTop = region.Top;
int clipWidth = region.Width;
int clipHeight = region.Height;
if (texture.BitsPerPixel == 24) {
byte[] newBytes = new byte[3 * clipWidth * clipHeight];
int i = 0;
for (int y = 0; y < clipHeight; y++) {
int j = 3 * width * (clipTop + y) + 3 * clipLeft;
for (int x = 0; x < clipWidth; x++) {
newBytes[i + 0] = bytes[j + 0];
newBytes[i + 1] = bytes[j + 1];
newBytes[i + 2] = bytes[j + 2];
i += 3;
j += 3;
}
}
return new Texture(clipWidth, clipHeight, 24, newBytes);
} else {
byte[] newBytes = new byte[4 * clipWidth * clipHeight];
int i = 0;
for (int y = 0; y < clipHeight; y++) {
int j = 4 * width * (clipTop + y) + 4 * clipLeft;
for (int x = 0; x < clipWidth; x++) {
newBytes[i + 0] = bytes[j + 0];
newBytes[i + 1] = bytes[j + 1];
newBytes[i + 2] = bytes[j + 2];
newBytes[i + 3] = bytes[j + 3];
i += 4;
j += 4;
}
}
return new Texture(clipWidth, clipHeight, 32, newBytes);
}
}
throw new NotSupportedException();
}
/// <summary>Checks whether this instance is equal to the specified object.</summary>
/// <param name="obj">The object.</param>
/// <returns>Whether this instance is equal to the specified object.</returns>
public override bool Equals(object obj)
{
if (object.ReferenceEquals(this, obj))
{
return(true);
}
if (object.ReferenceEquals(this, null))
{
return(false);
}
if (object.ReferenceEquals(obj, null))
{
return(false);
}
if (!(obj is TextureClipRegion))
{
return(false);
}
TextureClipRegion x = (TextureClipRegion)obj;
if (this.MyLeft != x.MyLeft)
{
return(false);
}
if (this.MyTop != x.MyTop)
{
return(false);
}
if (this.MyWidth != x.MyWidth)
{
return(false);
}
if (this.MyHeight != x.MyHeight)
{
return(false);
}
return(true);
}
// --- constructors ---
/// <summary>Creates new texture parameters.</summary>
/// <param name="clipRegion">The region in the texture to be extracted, or a null reference for the entire texture.</param>
/// <param name="transparentColor">The color in the texture that should become transparent, or a null reference for no transparent color.</param>
public TextureParameters(TextureClipRegion clipRegion, Nullable <Color24> transparentColor)
{
this.MyClipRegion = clipRegion;
this.MyTransparentColor = transparentColor;
}
// --- constructors ---
/// <summary>Creates new texture parameters.</summary>
/// <param name="clipRegion">The region in the texture to be extracted, or a null reference for the entire texture.</param>
/// <param name="transparentColor">The color in the texture that should become transparent, or a null reference for no transparent color.</param>
public TextureParameters(TextureClipRegion clipRegion, Nullable<Color24> transparentColor) {
this.MyClipRegion = clipRegion;
this.MyTransparentColor = transparentColor;
}
