public override void Perform(Pixmap pixmap, PreviewImageQuery query)
{
int desiredWidth = query.DesiredWidth;
int desiredHeight = query.DesiredHeight;
Pixmap.Layer layer = pixmap.MainLayer;
if (layer == null)
{
query.Result = new Bitmap(1, 1);
return;
}
float widthRatio = (float)layer.Width / (float)layer.Height;
if (pixmap.Width * pixmap.Height > 4096 * 4096)
{
layer = layer.CloneSubImage(
pixmap.Width / 2 - Math.Min(desiredWidth, pixmap.Width) / 2,
pixmap.Height / 2 - Math.Min(desiredHeight, pixmap.Height) / 2,
Math.Min(desiredWidth, pixmap.Width),
Math.Min(desiredHeight, pixmap.Height));
if (layer.Width != desiredWidth || layer.Height != desiredHeight)
{
layer = layer.CloneRescale(desiredWidth, desiredHeight, Pixmap.FilterMethod.Linear);
}
}
else if (query.SizeMode == PreviewSizeMode.FixedBoth)
{
layer = layer.CloneRescale(desiredWidth, desiredHeight, Pixmap.FilterMethod.Linear);
}
else if (query.SizeMode == PreviewSizeMode.FixedWidth)
{
layer = layer.CloneRescale(desiredWidth, MathF.RoundToInt(desiredWidth / widthRatio), Pixmap.FilterMethod.Linear);
}
else if (query.SizeMode == PreviewSizeMode.FixedHeight)
{
layer = layer.CloneRescale(MathF.RoundToInt(widthRatio * desiredHeight), desiredHeight, Pixmap.FilterMethod.Linear);
}
else
{
layer = layer.Clone();
}
query.Result = layer.ToBitmap();
}
/// <summary>
/// Loads the specified <see cref="Duality.Resources.Pixmap">Pixmaps</see> pixel data.
/// </summary>
/// <param name="basePixmap">The <see cref="Duality.Resources.Pixmap"/> that is used as pixel data source.</param>
/// <param name="sizeMode">Specifies behaviour in case the source data has non-power-of-two dimensions.</param>
public void LoadData(ContentRef <Pixmap> basePixmap, SizeMode sizeMode)
{
DualityApp.GuardSingleThreadState();
if (this.glTexId == 0)
{
this.glTexId = GL.GenTexture();
}
this.needsReload = false;
this.basePixmap = basePixmap;
this.texSizeMode = sizeMode;
int lastTexId;
GL.GetInteger(GetPName.TextureBinding2D, out lastTexId);
GL.BindTexture(TextureTarget.Texture2D, this.glTexId);
if (!this.basePixmap.IsExplicitNull)
{
Pixmap.Layer pixelData = null;
Pixmap basePixmapRes = this.basePixmap.IsAvailable ? this.basePixmap.Res : null;
if (basePixmapRes != null)
{
pixelData = basePixmapRes.MainLayer;
this.atlas = basePixmapRes.Atlas != null?basePixmapRes.Atlas.ToArray() : null;
}
if (pixelData == null)
{
pixelData = Pixmap.Checkerboard.Res.MainLayer;
}
this.AdjustSize(pixelData.Width, pixelData.Height);
this.SetupOpenGLRes();
if (this.texSizeMode != SizeMode.NonPowerOfTwo &&
(this.pxWidth != this.texWidth || this.pxHeight != this.texHeight))
{
if (this.texSizeMode == SizeMode.Enlarge)
{
Pixmap.Layer oldData = pixelData;
pixelData = oldData.CloneResize(this.texWidth, this.texHeight);
// Fill border pixels manually - that's cheaper than ColorTransparentPixels here.
oldData.DrawOnto(pixelData, BlendMode.Solid, this.pxWidth, 0, 1, this.pxHeight, this.pxWidth - 1, 0);
oldData.DrawOnto(pixelData, BlendMode.Solid, 0, this.pxHeight, this.pxWidth, 1, 0, this.pxHeight - 1);
}
else
{
pixelData = pixelData.CloneRescale(this.texWidth, this.texHeight, Pixmap.FilterMethod.Linear);
}
}
// Load pixel data to video memory
GL.TexImage2D(TextureTarget.Texture2D, 0,
this.pixelformat, pixelData.Width, pixelData.Height, 0,
GLPixelFormat.Rgba, PixelType.UnsignedByte,
pixelData.Data);
// Adjust atlas to represent UV coordinates
if (this.atlas != null)
{
Vector2 scale;
scale.X = this.uvRatio.X / this.pxWidth;
scale.Y = this.uvRatio.Y / this.pxHeight;
for (int i = 0; i < this.atlas.Length; i++)
{
this.atlas[i].X *= scale.X;
this.atlas[i].W *= scale.X;
this.atlas[i].Y *= scale.Y;
this.atlas[i].H *= scale.Y;
}
}
}
else
{
this.atlas = null;
this.AdjustSize(this.size.X, this.size.Y);
this.SetupOpenGLRes();
}
GL.BindTexture(TextureTarget.Texture2D, lastTexId);
}