private int _width = 0; // Original image width.
#endregion Fields
#region Constructors
/// <summary>
/// Constructs a new texture resource.
/// </summary>
/// <param name="image">The pixel map to use for the texture.</param>
public ResTexture(Bitmap image)
{
PixelMap map = new PixelMap(image);
_pixels = (int[,])map.Pixels.Clone();
SetTexture(map);
}
/// <summary>
/// Loads a texture to the texture list
/// </summary>
/// <param name="image">The bitmap image used as a texture</param>
/// <param name="id">The id of the texture.</param>
public static void LoadTexture(PixelMap image, int id)
{
// If the key already exists
if (_sprites.ContainsKey(id))
{
// Dispose of old texture
_sprites[id].Dispose();
// Create a new texture
_sprites[id] = new ResTexture(image);
}
else // Add a texture to the list
{
_sprites.Add(id, new ResTexture(image));
}
}
/// <summary>
/// Pastes a pixel map at the desired position
/// </summary>
/// <param name="pixelMap">The pixel map to paste</param>
/// <param name="x">The horizontal coordinate to start pasting</param>
/// <param name="y">The vertical coordinate to start pasting</param>
public void Paste(PixelMap pixelMap, int originX, int originY)
{
// Iterate through the pixels horizontally
for (int x = 0; x < pixelMap.Width; x++)
{
// Iterate through the pixels vertically
for (int y = 0; y < pixelMap.Height; y++)
{
// Calculate index
int posX = originX + x;
int posY = originY + y;
// Set pixel if within bounds
if (posX >= 0 && posY >= 0 && posX < _width && posY < _height)
{
_pixels[posX, posY] = pixelMap.Pixels[x, y];
}
}
}
}
/// <summary>
/// Checks if two pixel maps are the same
/// </summary>
/// <param name="map2">The first pixel map to check</param>
/// <param name="map2">The second pixel map to check</param>
/// <returns>If the two pixel maps are the same</returns>
public static bool Same(PixelMap map1, PixelMap map2)
{
// If either maps are empty, return
if (map1 == null && map2 != null)
{
return(false);
}
// If either maps are empty, return
if (map1 != null && map2 == null)
{
return(false);
}
// If both maps are empty, return true
if (map1 == null && map2 == null)
{
return(true);
}
// If the pixel map sizes, color key, or use key are different, then these pixel maps are not the same
if (map1.Width != map2.Width || map1.Height != map2.Height || map1.ColorKey != map2.ColorKey || map1.UseKey != map2.UseKey)
{
return(false);
}
// Check all the pixels for a mismatch
for (int y = 0; y < map1.Pixels.GetLength(1); y++)
{
for (int x = 0; x < map1.Pixels.GetLength(0); x++)
{
if (map1.Pixels[x, y] != map2.Pixels[x, y])
{
return(false);
}
}
}
// The pixel maps are the same
return(true);
}
/// <summary>
/// Sets the texture id.
/// </summary>
/// <param name="pixelMap">Pixel map to use as a texture.</param>
private unsafe void SetTexture(PixelMap pixelMap)
{
// Original size.
_width = pixelMap.Width;
_height = pixelMap.Height;
// Get a power of 2.
if (_width > _height)
_textureSize = MathMethods.Pow(_width, 2);
else
_textureSize = MathMethods.Pow(_height, 2);
// Copy the pixel map and resize it.
PixelMap copy = new PixelMap(_textureSize, _textureSize, Color.Black);
copy.Paste(pixelMap, 0, 0);
byte[] data = copy.ToOpenGLTexture();
// Get texture pointer.
fixed (uint* id = &_textureId) { OpenGL.glGenTextures(1, id); }
// If a valid texture was created.
if (_textureId != 0)
{
// Bind the new opengl texture.
OpenGL.glBindTexture(GLTexture.Texture2D, _textureId);
// Allocate some native memory to store data in.
IntPtr textureData = Marshal.AllocHGlobal(data.Length);
Marshal.Copy(data, 0, textureData, data.Length);
// Set filters.
OpenGL.glTexParameteri(GLTexture.Texture2D, GLTexParamPName.TextureMinFilter, GLTextureFilter.Nearest);
OpenGL.glTexParameteri(GLTexture.Texture2D, GLTexParamPName.TextureMagFilter, GLTextureFilter.Nearest);
// Place data into video memory.
OpenGL.glTexImage2D(GLTexture.Texture2D, 0, GLInternalFormat.RGBA8, _textureSize, _textureSize, 0, GLPixelFormat.RGBA, GLDataType.UnsignedByte, textureData);
// Deallocate native memory.
Marshal.FreeHGlobal(textureData);
}
}
/// <summary>
/// Pastes a pixel map at the desired position.
/// </summary>
/// <param name="pixelMap">The pixel map to paste.</param>
/// <param name="x">The horizontal coordinate to start pasting.</param>
/// <param name="y">The vertical coordinate to start pasting.</param>
public void Paste(PixelMap pixelMap, int originX, int originY)
{
// Iterate through the pixels horizontally.
for (int x = 0; x < pixelMap.Width; x++)
{
// Iterate through the pixels vertically.
for (int y = 0; y < pixelMap.Height; y++)
{
// Calculate index.
int posX = originX + x;
int posY = originY + y;
// Set pixel if within bounds.
if (posX >= 0 && posY >= 0 && posX < _width && posY < _height)
_pixels[posX, posY] = pixelMap.Pixels[x, y];
}
}
}
/// <summary>
/// Creates a shallow copy of the pixel map.
/// </summary>
/// <returns>A shallow copy of the pixel map.</returns>
public PixelMap Clone()
{
// Clone pixel map.
PixelMap map = new PixelMap((int[,])_pixels.Clone());
map.ColorKey = _colorKey;
map.UseKey = _useKey;
// Return shallow copy.
return map;
}
/// <summary>
/// Checks if two pixel maps are the same.
/// </summary>
/// <param name="map1">The first pixel map to check.</param>
/// <param name="map2">The second pixel map to check.</param>
/// <returns>If the two pixel maps are the same.</returns>
public static bool Same(PixelMap map1, PixelMap map2)
{
// If either maps are empty, return.
if (map1 == null || map2 == null)
return false;
// If the pixel map sizes are different, then these pixel maps are not the same.
if (map1.Width != map2.Width || map1.Height != map2.Height)
return false;
// Check all the pixels for a mismatch.
for (int y = 0; y < map1.Pixels.GetLength(1); y++)
for (int x = 0; x < map1.Pixels.GetLength(0); x++)
if (map1.Pixels[x, y] != map2.Pixels[x, y])
return false;
// The pixel maps are the same.
return true;
}