public void RenderWithSpan(IImageReaderWriter dest,
ScanlineRasterizer sclineRas,
Scanline scline,
ISpanGenerator spanGenerator)
{
if (!sclineRas.RewindScanlines())
{
return;
} //early exit
//-----------------------------------------------
scline.ResetSpans(sclineRas.MinX, sclineRas.MaxX);
spanGenerator.Prepare();
if (dest.Stride / 4 > (tempSpanColors.AllocatedSize))
{
//if not enough -> alloc more
tempSpanColors.Clear(dest.Stride / 4);
}
ColorRGBA[] colorArray = tempSpanColors.Array;
while (sclineRas.SweepScanline(scline))
{
//render single scanline
int y = scline.Y;
int num_spans = scline.SpanCount;
byte[] covers = scline.GetCovers();
for (int i = 1; i <= num_spans; ++i)
{
ScanlineSpan span = scline.GetSpan(i);
int x = span.x;
int span_len = span.len;
bool firstCoverForAll = false;
if (span_len < 0)
{
span_len = -span_len;
firstCoverForAll = true;
} //make absolute value
//1. generate colors -> store in colorArray
spanGenerator.GenerateColors(colorArray, 0, x, y, span_len);
//2. blend color in colorArray to destination image
dest.BlendColorHSpan(x, y, span_len,
colorArray, 0,
covers, span.cover_index,
firstCoverForAll);
}
}
}
public virtual void BlendColorHSpan(int x, int y, int len, ColorRGBA[] colors, int colorsIndex, byte[] covers, int coversIndex, bool firstCoverForAll)
{
linkedImage.BlendColorHSpan(x, y, len, colors, colorsIndex, covers, coversIndex, firstCoverForAll);
}
public void RenderWithSpan(IImageReaderWriter dest,
ScanlineRasterizer sclineRas,
Scanline scline,
ISpanGenerator spanGenerator)
{
if (!sclineRas.RewindScanlines()) { return; } //early exit
//-----------------------------------------------
scline.ResetSpans(sclineRas.MinX, sclineRas.MaxX);
spanGenerator.Prepare();
if (dest.Stride / 4 > (tempSpanColors.AllocatedSize))
{
//if not enough -> alloc more
tempSpanColors.Clear(dest.Stride / 4);
}
Color[] colorArray = tempSpanColors.Array;
while (sclineRas.SweepScanline(scline))
{
//render single scanline
int y = scline.Y;
int num_spans = scline.SpanCount;
byte[] covers = scline.GetCovers();
for (int i = 1; i <= num_spans; ++i)
{
ScanlineSpan span = scline.GetSpan(i);
int x = span.x;
int span_len = span.len;
bool firstCoverForAll = false;
if (span_len < 0)
{
span_len = -span_len;
firstCoverForAll = true;
} //make absolute value
//1. generate colors -> store in colorArray
spanGenerator.GenerateColors(colorArray, 0, x, y, span_len);
//2. blend color in colorArray to destination image
dest.BlendColorHSpan(x, y, span_len,
colorArray, 0,
covers, span.cover_index,
firstCoverForAll);
}
}
}
