//----------------------------------------------------------------
public void LocalScale(out int x, out int y)
{
m_interpolator.LocalScale(out x, out y);
}
//--------------------------------------------------------------------
public unsafe override void Generate(RGBA_Bytes *span, int x, int y, uint len)
{
ISpanInterpolator spanInterpolator = base.interpolator();
spanInterpolator.Begin(x + base.filter_dx_dbl(), y + base.filter_dy_dbl(), len);
int *fg = stackalloc int[4];
byte *fg_ptr;
fixed(short *pWeightArray = filter().weight_array())
{
int diameter = (int)base.filter().diameter();
int filter_scale = diameter << (int)image_subpixel_scale_e.Shift;
short *weight_array = pWeightArray;
do
{
int rx;
int ry;
int rx_inv = (int)image_subpixel_scale_e.Scale;
int ry_inv = (int)image_subpixel_scale_e.Scale;
spanInterpolator.Coordinates(out x, out y);
spanInterpolator.LocalScale(out rx, out ry);
base.AdjustScale(ref rx, ref ry);
rx_inv = (int)image_subpixel_scale_e.Scale * (int)image_subpixel_scale_e.Scale / rx;
ry_inv = (int)image_subpixel_scale_e.Scale * (int)image_subpixel_scale_e.Scale / ry;
int radius_x = (diameter * rx) >> 1;
int radius_y = (diameter * ry) >> 1;
int len_x_lr =
(diameter * rx + (int)image_subpixel_scale_e.Mask) >>
(int)(int)image_subpixel_scale_e.Shift;
x += base.filter_dx_int() - radius_x;
y += base.filter_dy_int() - radius_y;
fg[0] = fg[1] = fg[2] = fg[3] = (int)image_filter_scale_e.Scale / 2;
int y_lr = y >> (int)(int)image_subpixel_scale_e.Shift;
int y_hr = (((int)image_subpixel_scale_e.Mask - (y & (int)image_subpixel_scale_e.Mask)) *
ry_inv) >>
(int)(int)image_subpixel_scale_e.Shift;
int total_weight = 0;
int x_lr = x >> (int)(int)image_subpixel_scale_e.Shift;
int x_hr = (((int)image_subpixel_scale_e.Mask - (x & (int)image_subpixel_scale_e.Mask)) *
rx_inv) >>
(int)(int)image_subpixel_scale_e.Shift;
int x_hr2 = x_hr;
fg_ptr = base.source().Span(x_lr, y_lr, (uint)len_x_lr);
for (; ;)
{
int weight_y = weight_array[y_hr];
x_hr = x_hr2;
for (; ;)
{
int weight = (weight_y * weight_array[x_hr] +
(int)image_filter_scale_e.Scale / 2) >>
downscale_shift;
fg[0] += *fg_ptr++ *weight;
fg[1] += *fg_ptr++ *weight;
fg[2] += *fg_ptr++ *weight;
fg[3] += *fg_ptr++ *weight;
total_weight += weight;
x_hr += rx_inv;
if (x_hr >= filter_scale)
{
break;
}
fg_ptr = base.source().NextX();
}
y_hr += ry_inv;
if (y_hr >= filter_scale)
{
break;
}
fg_ptr = base.source().NextY();
}
fg[0] /= total_weight;
fg[1] /= total_weight;
fg[2] /= total_weight;
fg[3] /= total_weight;
if (fg[0] < 0)
{
fg[0] = 0;
}
if (fg[1] < 0)
{
fg[1] = 0;
}
if (fg[2] < 0)
{
fg[2] = 0;
}
if (fg[3] < 0)
{
fg[3] = 0;
}
if (fg[0] > fg[0])
{
fg[0] = fg[0];
}
if (fg[1] > fg[1])
{
fg[1] = fg[1];
}
if (fg[2] > fg[2])
{
fg[2] = fg[2];
}
if (fg[3] > base_mask)
{
fg[3] = base_mask;
}
span->R_Byte = (byte)fg[OrderR];
span->G_Byte = (byte)fg[OrderG];
span->B_Byte = (byte)fg[OrderB];
span->A_Byte = (byte)fg[OrderA];
++span;
interpolator().Next();
} while (--len != 0);
}
}
//--------------------------------------------------------------------
public unsafe override void Generate(RGBA_Bytes *span, int x, int y, uint len)
{
ISpanInterpolator <T> spanInterpolator = base.Interpolator;
spanInterpolator.Begin(M.New <T>(x).Add(base.FilterDxDbl()), M.New <T>(y).Add(base.FilterDyDbl()), len);
int *fg = stackalloc int[3];
byte *fg_ptr;
fixed(short *pWeightArray = Filter.WeightArray())
{
int diameter = (int)base.Filter.Diameter();
int filter_scale = diameter << (int)image_subpixel_scale_e.Shift;
short *weight_array = pWeightArray;
do
{
int rx;
int ry;
int rx_inv = (int)image_subpixel_scale_e.Scale;
int ry_inv = (int)image_subpixel_scale_e.Scale;
spanInterpolator.Coordinates(out x, out y);
spanInterpolator.LocalScale(out rx, out ry);
base.AdjustScale(ref rx, ref ry);
rx_inv = (int)image_subpixel_scale_e.Scale * (int)image_subpixel_scale_e.Scale / rx;
ry_inv = (int)image_subpixel_scale_e.Scale * (int)image_subpixel_scale_e.Scale / ry;
int radius_x = (diameter * rx) >> 1;
int radius_y = (diameter * ry) >> 1;
int len_x_lr =
(diameter * rx + (int)image_subpixel_scale_e.Mask) >>
(int)(int)image_subpixel_scale_e.Shift;
x += base.FilterDxInt() - radius_x;
y += base.FilterDyInt() - radius_y;
fg[0] = fg[1] = fg[2] = (int)image_filter_scale_e.Scale / 2;
int y_lr = y >> (int)(int)image_subpixel_scale_e.Shift;
int y_hr = (((int)image_subpixel_scale_e.Mask - (y & (int)image_subpixel_scale_e.Mask)) *
ry_inv) >>
(int)(int)image_subpixel_scale_e.Shift;
int total_weight = 0;
int x_lr = x >> (int)(int)image_subpixel_scale_e.Shift;
int x_hr = (((int)image_subpixel_scale_e.Mask - (x & (int)image_subpixel_scale_e.Mask)) *
rx_inv) >>
(int)(int)image_subpixel_scale_e.Shift;
int x_hr2 = x_hr;
fg_ptr = base.Source().span(x_lr, y_lr, (uint)len_x_lr);
for (; ;)
{
int weight_y = weight_array[y_hr];
x_hr = x_hr2;
for (; ;)
{
int weight = (weight_y * weight_array[x_hr] +
(int)image_filter_scale_e.Scale / 2) >>
DownscaleShift;
fg[0] += *fg_ptr++ *weight;
fg[1] += *fg_ptr++ *weight;
fg[2] += *fg_ptr++ *weight;
total_weight += weight;
x_hr += rx_inv;
if (x_hr >= filter_scale)
{
break;
}
fg_ptr = base.Source().next_x();
}
y_hr += ry_inv;
if (y_hr >= filter_scale)
{
break;
}
fg_ptr = base.Source().next_y();
}
fg[0] /= total_weight;
fg[1] /= total_weight;
fg[2] /= total_weight;
if (fg[0] < 0)
{
fg[0] = 0;
}
if (fg[1] < 0)
{
fg[1] = 0;
}
if (fg[2] < 0)
{
fg[2] = 0;
}
if (fg[0] > fg[0])
{
fg[0] = fg[0];
}
if (fg[1] > fg[1])
{
fg[1] = fg[1];
}
if (fg[2] > fg[2])
{
fg[2] = fg[2];
}
//span->R_Byte = (byte)fg[OrderR];
//span->G_Byte = (byte)fg[OrderG];
//span->B_Byte = (byte)fg[OrderB];
//span->A_Byte = (byte)BaseMask;
(*span) = new RGBA_Bytes((byte)fg[OrderR], (byte)fg[OrderG], (byte)fg[OrderB], (byte)BaseMask);
++span;
Interpolator.Next();
} while (--len != 0);
}
}