/// <summary>
/// Constructs a DirectX9 surface for this image from a PixelMap.
/// </summary>
/// <param name="pixelMap">PixelMap to construct surface from.</param>
void ConstructFromPixelMap(PixelMap pixelMap)
{
_pixelMap = pixelMap;
// Work out size of texture to create so that we have a nice square texture.
if (_dx9Driver.DX9Device.DeviceCaps.TextureCaps.SupportsSquareOnly == true || _dx9Driver.DX9Device.DeviceCaps.TextureCaps.SupportsPower2 == true)
{
if (pixelMap.Width > pixelMap.Height)
{
_textureWidth = MathMethods.Pow(pixelMap.Width, 2);
_textureHeight = _textureWidth;
}
else
{
_textureHeight = MathMethods.Pow(pixelMap.Height, 2);
_textureWidth = _textureHeight;
}
}
else
{
_textureWidth = pixelMap.Width;
_textureHeight = pixelMap.Height;
}
// Create texture.
_texture = new Texture(_dx9Driver.DX9Device, _textureWidth, _textureHeight, 1, Usage.None, Format.A8R8G8B8, Pool.Managed);
// Copy the pixelMap and resize it.
PixelMap copy = new PixelMap(_textureWidth, _textureHeight);
copy.Fill(0x00000000);
copy.Paste(pixelMap, 0, 0);
// Add memory pressure so the GC collects faster.
_memoryPressure = copy.Data.Length;
GC.AddMemoryPressure(_memoryPressure);
// Create a buffer and then write the image data into it.
int pitch;
GraphicsStream stream = _texture.LockRectangle(0, 0, out pitch);
stream.Write(copy.Data);
_texture.UnlockRectangle(0);
// Sets up the vertex-buffer so all our data is correct
_vertexArray[0].X = 0;
_vertexArray[0].Y = 0;
_vertexArray[1].X = _textureWidth;
_vertexArray[1].Y = 0;
_vertexArray[2].X = _textureWidth;
_vertexArray[2].Y = _textureHeight;
_vertexArray[3].X = 0;
_vertexArray[3].Y = _textureHeight;
// Hook into the dx9 disposal event so we can clean up.
_dx9Driver.DX9Device.Disposing += new EventHandler(DX9Device_Disposing);
}