private bool CalculateTextureAndRenderAreas(Rectf renderSettingDestArea, ref Rectf?clippingArea, out Rectf finalRect, ref Rectf texRect)
{
var dest = (renderSettingDestArea);
// apply rendering offset to the destination Rect
dest.Offset(d_scaledOffset);
// get the rect area that we will actually draw to (i.e. perform clipping)
finalRect = clippingArea.HasValue ? dest.GetIntersection(clippingArea.Value) : dest;
// check if rect was totally clipped
if ((finalRect.Width == 0) || (finalRect.Height == 0))
{
return(true);
}
// Obtain correct scale values from the texture
var texelScale = _texture.GetTexelScaling();
var texPerPix = new Lunatics.Mathematics.Vector2(d_imageArea.Width / dest.Width,
d_imageArea.Height / dest.Height);
// calculate final, clipped, texture co-ordinates
texRect = new Rectf((d_imageArea.d_min + ((finalRect.d_min - dest.d_min) * texPerPix)) * texelScale,
(d_imageArea.d_max + ((finalRect.d_max - dest.d_max) * texPerPix)) * texelScale);
// TODO: This is clearly not optimal but the only way to go with the current
// Font rendering system. Distance field rendering would allow us to ignore the
// pixel alignment.
finalRect.d_min.X = CoordConverter.AlignToPixels(finalRect.d_min.X);
finalRect.d_min.Y = CoordConverter.AlignToPixels(finalRect.d_min.Y);
finalRect.d_max.X = CoordConverter.AlignToPixels(finalRect.d_max.X);
finalRect.d_max.Y = CoordConverter.AlignToPixels(finalRect.d_max.Y);
return(false);
}
// implemets abstract from base
protected override void AddImageRenderGeometryToWindowImpl(Window srcWindow, Rectf destRect, ColourRect modColours, Rectf?clipper, bool clipToDisplay)
{
// get final image to use.
var img = IsImageFetchedFromProperty()
? srcWindow.GetProperty <Image>(ImagePropertyName)
: Image;
// do not draw anything if image is not set.
if (img == null)
{
return;
}
var horzFormatting = HorizontalFormatting.Get(srcWindow);
var vertFormatting = VerticalFormatting.Get(srcWindow);
int horzTiles, vertTiles;
float xpos, ypos;
var imgSz = img.GetRenderedSize();
// calculate final colours to be used
ColourRect finalColours;
InitColoursRect(srcWindow, modColours, out finalColours);
// calculate initial x co-ordinate and horizontal tile count according to formatting options
switch (horzFormatting)
{
case Base.HorizontalFormatting.Stretched:
imgSz.Width = destRect.Width;
xpos = destRect.Left;
horzTiles = 1;
break;
case Base.HorizontalFormatting.Tiled:
xpos = destRect.Left;
horzTiles = Math.Abs((int)((destRect.Width + (imgSz.Width - 1)) / imgSz.Width));
break;
case Base.HorizontalFormatting.LeftAligned:
xpos = destRect.Left;
horzTiles = 1;
break;
case Base.HorizontalFormatting.CentreAligned:
xpos = destRect.Left + CoordConverter.AlignToPixels((destRect.Width - imgSz.Width) * 0.5f);
horzTiles = 1;
break;
case Base.HorizontalFormatting.RightAligned:
xpos = destRect.Right - imgSz.Width;
horzTiles = 1;
break;
default:
throw new InvalidRequestException("An unknown HorizontalFormatting value was specified.");
}
// calculate initial y co-ordinate and vertical tile count according to formatting options
switch (vertFormatting)
{
case Base.VerticalFormatting.Stretched:
imgSz.Height = destRect.Height;
ypos = destRect.Top;
vertTiles = 1;
break;
case Base.VerticalFormatting.Tiled:
ypos = destRect.Top;
vertTiles = Math.Abs((int)((destRect.Height + (imgSz.Height - 1)) / imgSz.Height));
break;
case Base.VerticalFormatting.TopAligned:
ypos = destRect.Top;
vertTiles = 1;
break;
case Base.VerticalFormatting.CentreAligned:
ypos = destRect.Top + CoordConverter.AlignToPixels((destRect.Height - imgSz.Height) * 0.5f);
vertTiles = 1;
break;
case Base.VerticalFormatting.BottomAligned:
ypos = destRect.Bottom - imgSz.Height;
vertTiles = 1;
break;
default:
throw new InvalidRequestException("An unknown VerticalFormatting value was specified.");
}
// perform final rendering (actually is now a caching of the images which will be drawn)
var imgRenderSettings = new ImageRenderSettings(Rectf.Zero, null, !clipToDisplay, finalColours);
imgRenderSettings.DestArea.Top = ypos;
imgRenderSettings.DestArea.Bottom = ypos + imgSz.Height;
for (uint row = 0; row < vertTiles; ++row)
{
imgRenderSettings.DestArea.Left = xpos;
imgRenderSettings.DestArea.Right = xpos + imgSz.Width;
for (uint col = 0; col < horzTiles; ++col)
{
// use custom clipping for right and bottom edges when tiling the imagery
if (((vertFormatting == Base.VerticalFormatting.Tiled) && row == vertTiles - 1) ||
((horzFormatting == Base.HorizontalFormatting.Tiled) && col == horzTiles - 1))
{
imgRenderSettings.ClipArea = clipper.HasValue
? clipper.Value.GetIntersection(destRect)
: destRect;
}
// not tiliing, or not on far edges, just used passed in clipper (if any).
else
{
imgRenderSettings.ClipArea = clipper;
}
// add geometry for image to the target window.
var geomBuffers = img.CreateRenderGeometry(imgRenderSettings);
srcWindow.AppendGeometryBuffers(geomBuffers);
imgRenderSettings.DestArea.d_min.X += imgSz.Width;
imgRenderSettings.DestArea.d_max.X += imgSz.Width;
}
imgRenderSettings.DestArea.d_min.Y += imgSz.Height;
imgRenderSettings.DestArea.d_max.Y += imgSz.Height;
}
}
protected List <GeometryBuffer> CreateRenderGeometryForImage(Image image, VerticalFormatting vertFmt, HorizontalFormatting horzFmt, Rectf destRect, ColourRect colours, Rectf?clipper, bool clipToDisplay)
{
int horzTiles, vertTiles;
float xpos, ypos;
var imgSz = image.GetRenderedSize();
// calculate initial x co-ordinate and horizontal tile count according to formatting options
switch (horzFmt)
{
case HorizontalFormatting.Stretched:
imgSz.Width = destRect.Width;
xpos = destRect.Left;
horzTiles = 1;
break;
case HorizontalFormatting.Tiled:
xpos = destRect.Left;
horzTiles = Math.Abs((int)((destRect.Width + (imgSz.Width - 1)) / imgSz.Width));
break;
case HorizontalFormatting.LeftAligned:
xpos = destRect.Left;
horzTiles = 1;
break;
case HorizontalFormatting.CentreAligned:
xpos = destRect.Left + CoordConverter.AlignToPixels((destRect.Width - imgSz.Width) * 0.5f);
horzTiles = 1;
break;
case HorizontalFormatting.RightAligned:
xpos = destRect.Right - imgSz.Width;
horzTiles = 1;
break;
default:
throw new InvalidRequestException("An unknown HorizontalFormatting value was specified.");
}
// calculate initial y co-ordinate and vertical tile count according to formatting options
switch (vertFmt)
{
case VerticalFormatting.Stretched:
imgSz.Height = destRect.Height;
ypos = destRect.Top;
vertTiles = 1;
break;
case VerticalFormatting.Tiled:
ypos = destRect.Top;
vertTiles = Math.Abs((int)((destRect.Height + (imgSz.Height - 1)) / imgSz.Height));
break;
case VerticalFormatting.TopAligned:
ypos = destRect.Top;
vertTiles = 1;
break;
case VerticalFormatting.CentreAligned:
ypos = destRect.Top + CoordConverter.AlignToPixels((destRect.Height - imgSz.Height) * 0.5f);
vertTiles = 1;
break;
case VerticalFormatting.BottomAligned:
ypos = destRect.Bottom - imgSz.Height;
vertTiles = 1;
break;
default:
throw new InvalidRequestException("An unknown VerticalFormatting value was specified.");
}
// Create the render geometry
var geomBuffers = new List <GeometryBuffer>();
var renderSettings = new ImageRenderSettings(Rectf.Zero, null, !clipToDisplay, colours);
renderSettings.DestArea.d_min.Y = ypos;
renderSettings.DestArea.d_max.Y = ypos + imgSz.Height;
for (uint row = 0; row < vertTiles; ++row)
{
renderSettings.DestArea.d_min.X = xpos;
renderSettings.DestArea.d_max.X = xpos + imgSz.Width;
for (uint col = 0; col < horzTiles; ++col)
{
// use custom clipping for right and bottom edges when tiling the imagery
if (((vertFmt == VerticalFormatting.Tiled) && row == vertTiles - 1) ||
((horzFmt == HorizontalFormatting.Tiled) && col == horzTiles - 1))
{
renderSettings.ClipArea = clipper.HasValue ? clipper.Value.GetIntersection(destRect) : destRect;
}
else
{
// not tiling, or not on far edges, just used passed in clipper (if any).
renderSettings.ClipArea = clipper;
}
geomBuffers.AddRange(image.CreateRenderGeometry(renderSettings));
renderSettings.DestArea.d_min.X += imgSz.Width;
renderSettings.DestArea.d_max.X += imgSz.Width;
}
renderSettings.DestArea.d_min.Y += imgSz.Height;
renderSettings.DestArea.d_max.Y += imgSz.Height;
}
return(geomBuffers);
}
