public override unsafe void SuperSampleFitSurface(SurfaceBase source)
{
Rectangle dstRoi2 = Rectangle.Intersect(source.Bounds, Bounds);
int srcHeight = source.Height;
int srcWidth = source.Width;
long srcStride = source.Stride / 2;
for (int dstY = dstRoi2.Top; dstY < dstRoi2.Bottom; ++dstY)
{
double srcTop = (double)(dstY * srcHeight) / (double)height;
double srcTopFloor = Math.Floor(srcTop);
double srcTopWeight = 1 - (srcTop - srcTopFloor);
int srcTopInt = (int)srcTopFloor;
double srcBottom = (double)((dstY + 1) * srcHeight) / (double)height;
double srcBottomFloor = Math.Floor(srcBottom - 0.00001);
double srcBottomWeight = srcBottom - srcBottomFloor;
int srcBottomInt = (int)srcBottomFloor;
ushort *dstPtr = (ushort *)GetPointAddressUnchecked(dstRoi2.Left, dstY);
for (int dstX = dstRoi2.Left; dstX < dstRoi2.Right; ++dstX)
{
double srcLeft = (double)(dstX * srcWidth) / (double)width;
double srcLeftFloor = Math.Floor(srcLeft);
double srcLeftWeight = 1 - (srcLeft - srcLeftFloor);
int srcLeftInt = (int)srcLeftFloor;
double srcRight = (double)((dstX + 1) * srcWidth) / (double)width;
double srcRightFloor = Math.Floor(srcRight - 0.00001);
double srcRightWeight = srcRight - srcRightFloor;
int srcRightInt = (int)srcRightFloor;
double graySum = 0;
double alphaSum = 0;
// left fractional edge
ushort *srcLeftPtr = (ushort *)source.GetPointAddressUnchecked(srcLeftInt, srcTopInt + 1);
for (int srcY = srcTopInt + 1; srcY < srcBottomInt; ++srcY)
{
const double a = 255.0;
graySum += srcLeftPtr[0] * srcLeftWeight * a;
alphaSum += a * srcLeftWeight;
srcLeftPtr = (ushort *)(srcLeftPtr + srcStride);
}
// right fractional edge
ushort *srcRightPtr = (ushort *)source.GetPointAddressUnchecked(srcRightInt, srcTopInt + 1);
for (int srcY = srcTopInt + 1; srcY < srcBottomInt; ++srcY)
{
const double a = 255.0;
graySum += srcRightPtr[0] * srcRightWeight * a;
alphaSum += a * srcRightWeight;
srcRightPtr = (ushort *)(srcRightPtr + srcStride);
}
// top fractional edge
ushort *srcTopPtr = (ushort *)source.GetPointAddressUnchecked(srcLeftInt + 1, srcTopInt);
for (int srcX = srcLeftInt + 1; srcX < srcRightInt; ++srcX)
{
const double a = 255.0;
graySum += srcTopPtr[0] * srcTopWeight * a;
alphaSum += a * srcTopWeight;
++srcTopPtr;
}
// bottom fractional edge
ushort *srcBottomPtr = (ushort *)source.GetPointAddressUnchecked(srcLeftInt + 1, srcBottomInt);
for (int srcX = srcLeftInt + 1; srcX < srcRightInt; ++srcX)
{
const double a = 255.0;
graySum += srcBottomPtr[0] * srcBottomWeight * a;
alphaSum += 255.0 * srcBottomWeight;
++srcBottomPtr;
}
// center area
for (int srcY = srcTopInt + 1; srcY < srcBottomInt; ++srcY)
{
ushort *srcPtr = (ushort *)source.GetPointAddressUnchecked(srcLeftInt + 1, srcY);
for (int srcX = srcLeftInt + 1; srcX < srcRightInt; ++srcX)
{
graySum += (double)srcPtr[0] * 255.0;
alphaSum += 255.0;
++srcPtr;
}
}
// four corner pixels
ushort srcTL = *(ushort *)source.GetPointAddress(srcLeftInt, srcTopInt);
const double srcTLA = 255.0;
graySum += srcTL * (srcTopWeight * srcLeftWeight) * srcTLA;
alphaSum += srcTLA * (srcTopWeight * srcLeftWeight);
ushort srcTR = *(ushort *)source.GetPointAddress(srcRightInt, srcTopInt);
const double srcTRA = 255.0;
graySum += srcTR * (srcTopWeight * srcRightWeight) * srcTRA;
alphaSum += srcTRA * (srcTopWeight * srcRightWeight);
ushort srcBL = *(ushort *)source.GetPointAddress(srcLeftInt, srcBottomInt);
const double srcBLA = 255.0;
graySum += srcBL * (srcBottomWeight * srcLeftWeight) * srcBLA;
alphaSum += srcBLA * (srcBottomWeight * srcLeftWeight);
ushort srcBR = *(ushort *)source.GetPointAddress(srcRightInt, srcBottomInt);
const double srcBRA = 255.0;
graySum += srcBR * (srcBottomWeight * srcRightWeight) * srcBRA;
alphaSum += srcBRA * (srcBottomWeight * srcRightWeight);
double area = (srcRight - srcLeft) * (srcBottom - srcTop);
double alpha = alphaSum / area;
double gray;
if (alpha == 0)
{
gray = 0;
}
else
{
gray = graySum / alphaSum;
}
// add 0.5 so that rounding goes in the direction we want it to
gray += 0.5;
dstPtr[0] = (ushort)gray;
++dstPtr;
}
}
}
public override unsafe void SuperSampleFitSurface(SurfaceBase source)
{
Rectangle dstRoi2 = Rectangle.Intersect(source.Bounds, Bounds);
int srcHeight = source.Height;
int srcWidth = source.Width;
long srcStride = source.Stride;
int height = this.height;
int width = this.width;
for (int dstY = dstRoi2.Top; dstY < dstRoi2.Bottom; ++dstY)
{
double srcTop = (double)(dstY * srcHeight) / (double)height;
double srcTopFloor = Math.Floor(srcTop);
double srcTopWeight = 1 - (srcTop - srcTopFloor);
int srcTopInt = (int)srcTopFloor;
double srcBottom = (double)((dstY + 1) * srcHeight) / (double)height;
double srcBottomFloor = Math.Floor(srcBottom - 0.00001);
double srcBottomWeight = srcBottom - srcBottomFloor;
int srcBottomInt = (int)srcBottomFloor;
ColorBgra16 *dstPtr = (ColorBgra16 *)GetPointAddressUnchecked(dstRoi2.Left, dstY);
for (int dstX = dstRoi2.Left; dstX < dstRoi2.Right; ++dstX)
{
double srcLeft = (double)(dstX * srcWidth) / (double)width;
double srcLeftFloor = Math.Floor(srcLeft);
double srcLeftWeight = 1 - (srcLeft - srcLeftFloor);
int srcLeftInt = (int)srcLeftFloor;
double srcRight = (double)((dstX + 1) * srcWidth) / (double)width;
double srcRightFloor = Math.Floor(srcRight - 0.00001);
double srcRightWeight = srcRight - srcRightFloor;
int srcRightInt = (int)srcRightFloor;
double blueSum = 0;
double greenSum = 0;
double redSum = 0;
double alphaSum = 0;
// left fractional edge
ColorBgra16 *srcLeftPtr = (ColorBgra16 *)source.GetPointAddressUnchecked(srcLeftInt, srcTopInt + 1);
for (int srcY = srcTopInt + 1; srcY < srcBottomInt; ++srcY)
{
double a = srcLeftPtr->A;
blueSum += srcLeftPtr->B * srcLeftWeight * a;
greenSum += srcLeftPtr->G * srcLeftWeight * a;
redSum += srcLeftPtr->R * srcLeftWeight * a;
alphaSum += srcLeftPtr->A * srcLeftWeight;
srcLeftPtr = (ColorBgra16 *)((byte *)srcLeftPtr + srcStride);
}
// right fractional edge
ColorBgra16 *srcRightPtr = (ColorBgra16 *)source.GetPointAddressUnchecked(srcRightInt, srcTopInt + 1);
for (int srcY = srcTopInt + 1; srcY < srcBottomInt; ++srcY)
{
double a = srcRightPtr->A;
blueSum += srcRightPtr->B * srcRightWeight * a;
greenSum += srcRightPtr->G * srcRightWeight * a;
redSum += srcRightPtr->R * srcRightWeight * a;
alphaSum += srcRightPtr->A * srcRightWeight;
srcRightPtr = (ColorBgra16 *)((byte *)srcRightPtr + srcStride);
}
// top fractional edge
ColorBgra16 *srcTopPtr = (ColorBgra16 *)source.GetPointAddressUnchecked(srcLeftInt + 1, srcTopInt);
for (int srcX = srcLeftInt + 1; srcX < srcRightInt; ++srcX)
{
double a = srcTopPtr->A;
blueSum += srcTopPtr->B * srcTopWeight * a;
greenSum += srcTopPtr->G * srcTopWeight * a;
redSum += srcTopPtr->R * srcTopWeight * a;
alphaSum += srcTopPtr->A * srcTopWeight;
++srcTopPtr;
}
// bottom fractional edge
ColorBgra16 *srcBottomPtr = (ColorBgra16 *)source.GetPointAddressUnchecked(srcLeftInt + 1, srcBottomInt);
for (int srcX = srcLeftInt + 1; srcX < srcRightInt; ++srcX)
{
double a = srcBottomPtr->A;
blueSum += srcBottomPtr->B * srcBottomWeight * a;
greenSum += srcBottomPtr->G * srcBottomWeight * a;
redSum += srcBottomPtr->R * srcBottomWeight * a;
alphaSum += srcBottomPtr->A * srcBottomWeight;
++srcBottomPtr;
}
// center area
for (int srcY = srcTopInt + 1; srcY < srcBottomInt; ++srcY)
{
ColorBgra16 *srcPtr = (ColorBgra16 *)source.GetPointAddressUnchecked(srcLeftInt + 1, srcY);
for (int srcX = srcLeftInt + 1; srcX < srcRightInt; ++srcX)
{
double a = srcPtr->A;
blueSum += (double)srcPtr->B * a;
greenSum += (double)srcPtr->G * a;
redSum += (double)srcPtr->R * a;
alphaSum += (double)srcPtr->A;
++srcPtr;
}
}
// four corner pixels
ColorBgra16 srcTL = *(ColorBgra16 *)source.GetPointAddress(srcLeftInt, srcTopInt);
double srcTLA = srcTL.A;
blueSum += srcTL.B * (srcTopWeight * srcLeftWeight) * srcTLA;
greenSum += srcTL.G * (srcTopWeight * srcLeftWeight) * srcTLA;
redSum += srcTL.R * (srcTopWeight * srcLeftWeight) * srcTLA;
alphaSum += srcTL.A * (srcTopWeight * srcLeftWeight);
ColorBgra16 srcTR = *(ColorBgra16 *)source.GetPointAddress(srcRightInt, srcTopInt);
double srcTRA = srcTR.A;
blueSum += srcTR.B * (srcTopWeight * srcRightWeight) * srcTRA;
greenSum += srcTR.G * (srcTopWeight * srcRightWeight) * srcTRA;
redSum += srcTR.R * (srcTopWeight * srcRightWeight) * srcTRA;
alphaSum += srcTR.A * (srcTopWeight * srcRightWeight);
ColorBgra16 srcBL = *(ColorBgra16 *)source.GetPointAddress(srcLeftInt, srcBottomInt);
double srcBLA = srcBL.A;
blueSum += srcBL.B * (srcBottomWeight * srcLeftWeight) * srcBLA;
greenSum += srcBL.G * (srcBottomWeight * srcLeftWeight) * srcBLA;
redSum += srcBL.R * (srcBottomWeight * srcLeftWeight) * srcBLA;
alphaSum += srcBL.A * (srcBottomWeight * srcLeftWeight);
ColorBgra16 srcBR = *(ColorBgra16 *)source.GetPointAddress(srcRightInt, srcBottomInt);
double srcBRA = srcBR.A;
blueSum += srcBR.B * (srcBottomWeight * srcRightWeight) * srcBRA;
greenSum += srcBR.G * (srcBottomWeight * srcRightWeight) * srcBRA;
redSum += srcBR.R * (srcBottomWeight * srcRightWeight) * srcBRA;
alphaSum += srcBR.A * (srcBottomWeight * srcRightWeight);
double area = (srcRight - srcLeft) * (srcBottom - srcTop);
double alpha = alphaSum / area;
double blue;
double green;
double red;
if (alpha == 0)
{
blue = 0;
green = 0;
red = 0;
}
else
{
blue = blueSum / alphaSum;
green = greenSum / alphaSum;
red = redSum / alphaSum;
}
// add 0.5 so that rounding goes in the direction we want it to
blue += 0.5;
green += 0.5;
red += 0.5;
alpha += 0.5;
dstPtr->Bgra = (ulong)blue + ((ulong)green << 16) + ((ulong)red << 32) + ((ulong)alpha << 48);
++dstPtr;
}
}
}