public void Render(RowIterator row, int x, int count, CoverageIterator covers, Color c)
{
byte dst = c.A;
row.Move(x);
for (int i = 0; i < count; i++)
{
int alpha = covers.Current * c.A;
uint src = row[i];
row[i] = (byte)((((dst - src) * alpha) + (src << 16)) >> 16);
covers.MoveNext();
}
}
public void Render(RowIterator row, int x, int count, CoverageIterator covers, Color c)
{
row.Move(x + x + x);
for (int i = 0; i < 3 * count; i += 3)
{
int alpha = covers.Current * c.A;
int b = row[i + 0];
int g = row[i + 1];
int r = row[i + 2];
row[i + 0] = (byte)((((c.B - b) * alpha) + (b << 16)) >> 16);
row[i + 1] = (byte)((((c.G - g) * alpha) + (g << 16)) >> 16);
row[i + 2] = (byte)((((c.R - r) * alpha) + (r << 16)) >> 16);
covers.MoveNext();
}
}
/// <summary>
/// Renders the specified scanline in the specified color into the
/// rendering buffer.
/// </summary>
/// <param name="scanline">The scanline to render.</param>
/// <param name="color">The color to render the scanline.</param>
public void Render(Scanline scanline, Color color)
{
if (scanline.Y < 0 || scanline.Y >= m_rbuf.Height)
{
return;
}
int base_x = scanline.BaseX;
int y = scanline.Y;
RowIterator row = m_rbuf.Row(y);
Scanline.Iterator span = new Scanline.Iterator(scanline);
for (int num_spans = scanline.SpanCount; num_spans > 0; num_spans--)
{
int x = span.Next() + base_x;
CoverageIterator covers = span.Covers();
int num_pix = span.PixelCount();
if (x < 0)
{
num_pix += x;
if (num_pix <= 0)
{
continue;
}
covers -= x;
x = 0;
}
if (x + num_pix >= m_rbuf.Width)
{
num_pix = m_rbuf.Width - x;
if (num_pix <= 0)
{
continue;
}
}
m_span.Render(row, x, num_pix, covers, color);
}
}
public void Render(RowIterator row, int x, int count, CoverageIterator covers, Color c)
{
row.Move(x << 1);
for (int i = 0; i < count << 1; i += 2)
{
ushort rgb = (ushort)(row[i + 0] | row[i + 1]);
int alpha = covers.Current * c.A;
int r = (rgb >> 7) & 0xF8;
int g = (rgb >> 2) & 0xF8;
int b = (rgb << 3) & 0xF8;
int v =
(((((c.R - r) * alpha) + (r << 16)) >> 9) & 0x7C00) |
(((((c.G - g) * alpha) + (g << 16)) >> 14) & 0x3E0) |
((((c.B - b) * alpha) + (b << 16)) >> 19);
row[i + 0] = (byte)(v >> 8);
row[i + 1] = (byte)(v & 0xFF);
covers.MoveNext();
}
}
/// <summary>
/// Initializes a new instance of the Iterator class using the
/// specified scanline.
/// </summary>
/// <param name="scanline">The scanline.</param>
public Iterator(Scanline scanline)
{
m_covers = new CoverageIterator(scanline.m_covers);
m_counts = scanline.m_counts;
m_start_indeces = scanline.m_start_indeces;
}
