public void Render(IBitmapSrc source,
double destX, double destY,
double angleRadians,
double inScaleX, double inScaleY)
{
{ // exit early if the dest and source bounds don't touch.
// TODO: <BUG> make this do rotation and scalling
RectInt sourceBounds = source.GetBounds();
RectInt destBounds = _destBitmapBlender.GetBounds();
sourceBounds.Offset((int)destX, (int)destY);
if (!RectInt.DoIntersect(sourceBounds, destBounds))
{
if (inScaleX != 1 || inScaleY != 1 || angleRadians != 0)
{
throw new NotImplementedException();
}
return;
}
}
double scaleX = inScaleX;
double scaleY = inScaleY;
Affine graphicsTransform = this.CurrentTransformMatrix;
if (!graphicsTransform.IsIdentity())
{
if (scaleX != 1 || scaleY != 1 || angleRadians != 0)
{
throw new NotImplementedException();
}
graphicsTransform.Transform(ref destX, ref destY);
}
#if false // this is an optomization 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 isScale = (scaleX != 1 || scaleY != 1);
bool isRotated = true;
if (Math.Abs(angleRadians) < (0.1 * MathHelper.Tau / 360))
{
isRotated = false;
angleRadians = 0;
}
//bool IsMipped = false;
//double ox, oy;
//source.GetOriginOffset(out ox, out oy);
bool canUseMipMaps = isScale;
if (scaleX > 0.5 || scaleY > 0.5)
{
canUseMipMaps = false;
}
bool renderRequriesSourceSampling = isScale || isRotated || destX != (int)destX || destY != (int)destY;
using (VxsTemp.Borrow(out var v1, out var imgBoundsPath))
{
// this is the fast drawing path
if (renderRequriesSourceSampling)
{
// if the scalling 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);
//}
//Affine destRectTransform = BuildImageBoundsPath(source.Width, source.Height,
// destX, destY, ox, oy, scaleX, scaleY, angleRadians, imgBoundsPath);
//1.
BuildOrgImgRectVxs(source.Width, source.Height, imgBoundsPath);
//2.
Affine destRectTransform = CreateAffine(destX, destY, _ox, _oy, scaleX, scaleY, angleRadians);
//TODO: review reusable span generator an interpolator ***
// We invert it because it is the transform to make the image go to the same position as the polygon. LBB [2/24/2004]
_spanInterpolator.Transformer = destRectTransform.CreateInvert();
_imgSpanGenBilinearClip.BackgroundColor = Drawing.Color.Black;
_imgSpanGenBilinearClip.SetInterpolator(_spanInterpolator);
_imgSpanGenBilinearClip.SetSrcBitmap(source);
destRectTransform.TransformToVxs(imgBoundsPath, v1);
Render(v1, _imgSpanGenBilinearClip);
_imgSpanGenBilinearClip.ReleaseSrcBitmap();
// 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);
}
else // TODO: this can be even faster if we do not use an intermediat buffer
{
//Affine destRectTransform = BuildImageBoundsPath(source.Width, source.Height, destX, destY, imgBoundsPath);
BuildOrgImgRectVxs(source.Width, source.Height, imgBoundsPath);
//
var destRectTransform = new AffineMat();
destRectTransform.Translate(destX, destY);
//TODO: review reusable span generator an interpolator ***
// We invert it because it is the transform to make the image go to the same position as the polygon. LBB [2/24/2004]
_reuseableAffine.SetElements(destRectTransform.CreateInvert());
_spanInterpolator.Transformer = _reuseableAffine;
ImgSpanGen imgSpanGen = null;
switch (source.BitDepth)
{
case 32:
_img_NN_StepX.SetInterpolator(_spanInterpolator);
_img_NN_StepX.SetSrcBitmap(source);
imgSpanGen = _img_NN_StepX;
break;
//case 24:
// imgSpanGen = new ImgSpanGenRGB_NNStepXby1(source, interpolator);
// break;
//case 8:
// imgSpanGen = new ImgSpanGenGray_NNStepXby1(source, interpolator);
// break;
default:
throw new NotImplementedException();
}
TransformToVxs(ref destRectTransform, imgBoundsPath, v1);
Render(v1, imgSpanGen);
unchecked { _destImageChanged++; };
}
}
}
