public double SumOfDistances(ColorF other)
{
double dist = Math.Abs(red - other.red) + Math.Abs(green - other.green) + Math.Abs(blue - other.blue);
return(dist);
}
public static ColorF rgba_pre(ColorF c, float a)
{
return(new ColorF(c, a).premultiply());
}
public ColorF(ColorF c)
: this(c, c.alpha)
{
}
public static ColorF rgba_pre(ColorF c)
{
return(new ColorF(c).premultiply());
}
public override void Render(IImageByte source,
double destX,
double destY,
double angleRadians,
double inScaleX,
double inScaleY)
{
Affine graphicsTransform = GetTransform();
// exit early if the dest and source bounds don't touch.
// TODO: <BUG> make this do rotation and scaling
RectangleInt sourceBounds = source.GetBounds();
RectangleInt destBounds = this.destImageByte.GetBounds();
sourceBounds.Offset((int)(destX + graphicsTransform.tx), (int)(destY + graphicsTransform.ty));
if (!RectangleInt.DoIntersect(sourceBounds, destBounds))
{
if (inScaleX != 1 || inScaleY != 1 || angleRadians != 0)
{
throw new NotImplementedException();
}
return;
}
double scaleX = inScaleX;
double scaleY = inScaleY;
if (!graphicsTransform.is_identity())
{
if (scaleX != 1 || scaleY != 1 || angleRadians != 0)
{
throw new NotImplementedException();
}
graphicsTransform.transform(ref destX, ref destY);
}
#if false // this is an optimization that eliminates the drawing of images that have their alpha set to all 0 (happens with generated images like explosions).
MaxAlphaFrameProperty maxAlphaFrameProperty = MaxAlphaFrameProperty::GetMaxAlphaFrameProperty(source);
if ((maxAlphaFrameProperty.GetMaxAlpha() * color.A_Byte) / 256 <= ALPHA_CHANNEL_BITS_DIVISOR)
{
m_OutFinalBlitBounds.SetRect(0, 0, 0, 0);
}
#endif
bool isScaled = scaleX != 1 || scaleY != 1;
bool isRotated = true;
if (Math.Abs(angleRadians) < (0.1 * MathHelper.Tau / 360))
{
isRotated = false;
angleRadians = 0;
}
// bool IsMipped = false;
double sourceOriginOffsetX = source.OriginOffset.X;
double sourceOriginOffsetY = source.OriginOffset.Y;
bool canUseMipMaps = isScaled;
if (scaleX > 0.5 || scaleY > 0.5)
{
canUseMipMaps = false;
}
bool renderRequriesSourceSampling = isScaled || isRotated || destX != (int)destX || destY != (int)destY;
// this is the fast drawing path
if (renderRequriesSourceSampling)
{
#if false // if the scaling is small enough the results can be improved by using mip maps
if (CanUseMipMaps)
{
CMipMapFrameProperty *pMipMapFrameProperty = CMipMapFrameProperty::GetMipMapFrameProperty(source);
double OldScaleX = scaleX;
double OldScaleY = scaleY;
const CFrameInterface *pMippedFrame = pMipMapFrameProperty.GetMipMapFrame(ref scaleX, ref scaleY);
if (pMippedFrame != source)
{
IsMipped = true;
source = pMippedFrame;
sourceOriginOffsetX *= (OldScaleX / scaleX);
sourceOriginOffsetY *= (OldScaleY / scaleY);
}
HotspotOffsetX *= (inScaleX / scaleX);
HotspotOffsetY *= (inScaleY / scaleY);
}
#endif
switch (ImageRenderQuality)
{
case TransformQuality.Fastest:
{
DrawImageGetDestBounds(source, destX, destY, sourceOriginOffsetX, sourceOriginOffsetY, scaleX, scaleY, angleRadians, out Affine destRectTransform);
var sourceRectTransform = new Affine(destRectTransform);
// We invert it because it is the transform to make the image go to the same position as the polygon. LBB [2/24/2004]
sourceRectTransform.invert();
span_image_filter spanImageFilter;
var interpolator = new span_interpolator_linear(sourceRectTransform);
var sourceAccessor = new ImageBufferAccessorClip(source, ColorF.rgba_pre(0, 0, 0, 0).ToColor());
spanImageFilter = new span_image_filter_rgba_bilinear_clip(sourceAccessor, ColorF.rgba_pre(0, 0, 0, 0), interpolator);
DrawImage(spanImageFilter, destRectTransform);
}
break;
case TransformQuality.Best:
{
DrawImageGetDestBounds(source, destX, destY, sourceOriginOffsetX, sourceOriginOffsetY, scaleX, scaleY, angleRadians, out Affine destRectTransform);
var sourceRectTransform = new Affine(destRectTransform);
// We invert it because it is the transform to make the image go to the same position as the polygon. LBB [2/24/2004]
sourceRectTransform.invert();
var interpolator = new span_interpolator_linear(sourceRectTransform);
var sourceAccessor = new ImageBufferAccessorClip(source, ColorF.rgba_pre(0, 0, 0, 0).ToColor());
// spanImageFilter = new span_image_filter_rgba_bilinear_clip(sourceAccessor, RGBA_Floats.rgba_pre(0, 0, 0, 0), interpolator);
IImageFilterFunction filterFunction = null;
filterFunction = new image_filter_blackman(4);
var filter = new ImageFilterLookUpTable();
filter.calculate(filterFunction, true);
span_image_filter spanGenerator = new span_image_filter_rgba(sourceAccessor, interpolator, filter);
DrawImage(spanGenerator, destRectTransform);
}
break;
}
#if false // this is some debug you can enable to visualize the dest bounding box
LineFloat(BoundingRect.left, BoundingRect.top, BoundingRect.right, BoundingRect.top, WHITE);
LineFloat(BoundingRect.right, BoundingRect.top, BoundingRect.right, BoundingRect.bottom, WHITE);
LineFloat(BoundingRect.right, BoundingRect.bottom, BoundingRect.left, BoundingRect.bottom, WHITE);
LineFloat(BoundingRect.left, BoundingRect.bottom, BoundingRect.left, BoundingRect.top, WHITE);
#endif
}
else // TODO: this can be even faster if we do not use an intermediate buffer
{
DrawImageGetDestBounds(source, destX, destY, sourceOriginOffsetX, sourceOriginOffsetY, scaleX, scaleY, angleRadians, out Affine destRectTransform);
var sourceRectTransform = new Affine(destRectTransform);
// We invert it because it is the transform to make the image go to the same position as the polygon. LBB [2/24/2004]
sourceRectTransform.invert();
var interpolator = new span_interpolator_linear(sourceRectTransform);
var sourceAccessor = new ImageBufferAccessorClip(source, ColorF.rgba_pre(0, 0, 0, 0).ToColor());
span_image_filter spanImageFilter = null;
switch (source.BitDepth)
{
case 32:
spanImageFilter = new span_image_filter_rgba_nn_stepXby1(sourceAccessor, interpolator);
break;
case 24:
spanImageFilter = new span_image_filter_rgb_nn_stepXby1(sourceAccessor, interpolator);
break;
case 8:
spanImageFilter = new span_image_filter_gray_nn_stepXby1(sourceAccessor, interpolator);
break;
default:
throw new NotImplementedException();
}
// spanImageFilter = new span_image_filter_rgba_nn(sourceAccessor, interpolator);
DrawImage(spanImageFilter, destRectTransform);
DestImage.MarkImageChanged();
}
}
