public ImageFilterLookUpTable()
{
m_weight_array = new ArrayPOD <short>(256);
m_radius = (0);
m_diameter = (0);
m_start = (0);
}
//------------------------------------------------------------------------
public void Prepare()
{
if (m_num > 2)
{
int i, k;
int r;
int s;
double h, p, d, f, e;
for (k = 0; k < m_num; k++)
{
m_am[k] = 0.0;
}
int n1 = 3 * m_num;
ArrayPOD <double> al = new ArrayPOD <double>(n1);
for (k = 0; k < n1; k++)
{
al[k] = 0.0;
}
r = m_num;
s = m_num * 2;
n1 = m_num - 1;
d = m_am[m_xOffset + 1] - m_am[m_xOffset + 0];
e = (m_am[m_yOffset + 1] - m_am[m_yOffset + 0]) / d;
for (k = 1; k < n1; k++)
{
h = d;
d = m_am[m_xOffset + k + 1] - m_am[m_xOffset + k];
f = e;
e = (m_am[m_yOffset + k + 1] - m_am[m_yOffset + k]) / d;
al[k] = d / (d + h);
al[r + k] = 1.0 - al[k];
al[s + k] = 6.0 * (e - f) / (h + d);
}
for (k = 1; k < n1; k++)
{
p = 1.0 / (al[r + k] * al[k - 1] + 2.0);
al[k] *= -p;
al[s + k] = (al[s + k] - al[r + k] * al[s + k - 1]) * p;
}
m_am[n1] = 0.0;
al[n1 - 1] = al[s + n1 - 1];
m_am[n1 - 1] = al[n1 - 1];
for (k = n1 - 2, i = 0; i < m_num - 2; i++, k--)
{
al[k] = al[k] * al[k + 1] + al[s + k];
m_am[k] = al[k];
}
}
m_last_idx = -1;
}
public ImageFilterLookUpTable(IImageFilterFunction filter, bool normalization)
{
m_weight_array = new ArrayPOD <short>(256);
Calculate(filter, normalization);
}
public static void RenderCompound(AntiAliasedCompundRasterizer ras,
IScanline sl_aa,
IScanline sl_bin,
IPixelFormat pixelFormat,
SpanAllocator alloc,
IStyleHandler sh)
{
#if true
unsafe
{
if (ras.RewindScanlines())
{
int min_x = ras.MinX();
int len = ras.MaxX() - min_x + 2;
sl_aa.Reset(min_x, ras.MaxX());
sl_bin.Reset(min_x, ras.MaxX());
//typedef typename BaseRenderer::color_type color_type;
ArrayPOD<RGBA_Bytes> color_span = alloc.Allocate((uint)len * 2);
byte[] ManagedCoversArray = sl_aa.GetCovers();
fixed (byte* pCovers = ManagedCoversArray)
{
fixed (RGBA_Bytes* pColorSpan = color_span.Array)
{
int mix_bufferOffset = len;
uint num_spans;
uint num_styles;
uint style;
bool solid;
while ((num_styles = ras.SweepStyles()) > 0)
{
if (num_styles == 1)
{
// Optimization for a single Style. Happens often
//-------------------------
if (ras.SweepScanline(sl_aa, 0))
{
style = ras.Style(0);
if (sh.IsSolid(style))
{
// Just solid fill
//-----------------------
RenderSolidSingleScanLine(pixelFormat, sl_aa, sh.Color(style));
}
else
{
// Arbitrary Span Generator
//-----------------------
ScanlineSpan span_aa = sl_aa.Begin;
num_spans = sl_aa.NumberOfSpans;
for (; ; )
{
len = span_aa.len;
sh.GenerateSpan(pColorSpan,
span_aa.x,
sl_aa.y(),
(uint)len,
style);
pixelFormat.BlendHorizontalColorSpan(span_aa.x,
sl_aa.y(),
(uint)span_aa.len,
pColorSpan,
&pCovers[span_aa.cover_index], 0);
if (--num_spans == 0) break;
span_aa = sl_aa.GetNextScanlineSpan();
}
}
}
}
else // there are multiple Styles
{
if (ras.SweepScanline(sl_bin, -1))
{
// Clear the spans of the mix_buffer
//--------------------
ScanlineSpan span_bin = sl_bin.Begin;
num_spans = sl_bin.NumberOfSpans;
for (; ; )
{
Basics.MemClear((byte*)&pColorSpan[mix_bufferOffset + span_bin.x - min_x],
span_bin.len * sizeof(RGBA_Bytes));
if (--num_spans == 0) break;
span_bin = sl_bin.GetNextScanlineSpan();
}
for (uint i = 0; i < num_styles; i++)
{
style = ras.Style(i);
solid = sh.IsSolid(style);
if (ras.SweepScanline(sl_aa, (int)i))
{
//IColorType* Colors;
//IColorType* cspan;
//typename ScanlineAA::cover_type* covers;
ScanlineSpan span_aa = sl_aa.Begin;
num_spans = sl_aa.NumberOfSpans;
if (solid)
{
// Just solid fill
//-----------------------
for (; ; )
{
RGBA_Bytes c = sh.Color(style);
len = span_aa.len;
RGBA_Bytes* colors = &pColorSpan[mix_bufferOffset + span_aa.x - min_x];
byte* covers = &pCovers[span_aa.cover_index];
do
{
if (*covers == cover_full)
{
*colors = c;
}
else
{
colors->add(c, *covers);
}
++colors;
++covers;
}
while (--len != 0);
if (--num_spans == 0) break;
span_aa = sl_aa.GetNextScanlineSpan();
}
}
else
{
// Arbitrary Span Generator
//-----------------------
for (; ; )
{
len = span_aa.len;
RGBA_Bytes* colors = &pColorSpan[mix_bufferOffset + span_aa.x - min_x];
RGBA_Bytes* cspan = pColorSpan;
sh.GenerateSpan(cspan,
span_aa.x,
sl_aa.y(),
(uint)len,
style);
byte* covers = &pCovers[span_aa.cover_index];
do
{
if (*covers == cover_full)
{
*colors = *cspan;
}
else
{
colors->add(*cspan, *covers);
}
++cspan;
++colors;
++covers;
}
while (--len != 0);
if (--num_spans == 0) break;
span_aa = sl_aa.GetNextScanlineSpan();
}
}
}
}
// Emit the blended result as a Color hspan
//-------------------------
span_bin = sl_bin.Begin;
num_spans = sl_bin.NumberOfSpans;
for (; ; )
{
pixelFormat.BlendHorizontalColorSpan(span_bin.x,
sl_bin.y(),
(uint)span_bin.len,
&pColorSpan[mix_bufferOffset + span_bin.x - min_x],
null,
cover_full);
if (--num_spans == 0) break;
span_bin = sl_bin.GetNextScanlineSpan();
}
} // if(ras.SweepScanline(sl_bin, -1))
} // if(num_styles == 1) ... else
} // while((num_styles = ras.SweepStyles()) > 0)
}
}
} // if(ras.RewindScanlines())
#endif
}
}
//--------------------------------------------------------------------
public BinaryScanline()
{
m_last_x = (0x7FFFFFF0);
m_spans = new ArrayPOD <ScanlineSpan>(1000);
m_span_index = 0;
}