private void AllocateCellsIfRequired()
{
if (m_cells == null || (m_num_used_cells + 1) >= m_cells.Capacity())
{
if (m_num_used_cells >= (int)cell_block_scale_e.cell_block_limit)
{
return;
}
uint new_num_allocated_cells = m_num_used_cells + (uint)cell_block_scale_e.cell_block_size;
VectorPOD <CellAA> new_cells = new VectorPOD <CellAA>(new_num_allocated_cells);
if (m_cells != null)
{
new_cells.CopyFrom(m_cells);
}
m_cells = new_cells;
}
}
//======================================================render_scanline_aa
private static void GenerateAndRenderSingleScanline(IScanlineCache sl, IPixelFormat ren,
SpanAllocator alloc, ISpanGenerator<T> span_gen)
{
int y = sl.Y;
uint num_spans = sl.NumSpans;
ScanlineSpan scanlineSpan = sl.Begin();
byte[] ManagedCoversArray = sl.Covers;
unsafe
{
fixed (byte* pCovers = ManagedCoversArray)
{
for (; ; )
{
int x = scanlineSpan.X;
int len = scanlineSpan.Len;
if (len < 0) len = -len;
if (tempSpanColors.Capacity() < len)
{
tempSpanColors.Allocate((uint)(len));
}
fixed (RGBA_Bytes* pColors = tempSpanColors.Array)
{
span_gen.Generate(pColors, x, y, (uint)len);
#if use_timers
blend_color_hspan.Start();
#endif
ren.BlendColorHSpan(x, y, (uint)len, pColors, (scanlineSpan.Len < 0) ? null : &pCovers[scanlineSpan.CoverIndex], pCovers[scanlineSpan.CoverIndex]);
#if use_timers
blend_color_hspan.Stop();
#endif
}
if (--num_spans == 0) break;
scanlineSpan = sl.GetNextScanlineSpan();
}
}
}
}
// Returns the number of styles
public uint SweepStyles()
{
for (; ;)
{
if (m_scan_y > m_Rasterizer.MaxY)
{
return(0);
}
int num_cells = (int)m_Rasterizer.ScanlineNumCells((uint)m_scan_y);
CellAA[] cells;
uint cellOffset = 0;
int curCellOffset;
m_Rasterizer.ScanlineCells((uint)m_scan_y, out cells, out cellOffset);
uint num_styles = (uint)(m_max_style - m_min_style + 2);
uint style_id;
int styleOffset = 0;
m_cells.Allocate((uint)num_cells * 2, 256); // Each cell can have two styles
m_ast.Capacity(num_styles, 64);
m_asm.Allocate((num_styles + 7) >> 3, 8);
m_asm.Zero();
if (num_cells > 0)
{
// Pre-add zero (for no-fill style, that is, -1).
// We need that to ensure that the "-1 style" would go first.
m_asm.Array[0] |= 1;
m_ast.Add(0);
m_styles.Array[styleOffset].start_cell = 0;
m_styles.Array[styleOffset].num_cells = 0;
m_styles.Array[styleOffset].last_x = -0x7FFFFFFF;
m_sl_start = cells[0].X;
m_sl_len = (uint)(cells[num_cells - 1].X - m_sl_start + 1);
while (num_cells-- != 0)
{
curCellOffset = (int)cellOffset++;
AddStyle(cells[curCellOffset].Left);
AddStyle(cells[curCellOffset].Right);
}
// Convert the Y-histogram into the array of starting indexes
uint i;
uint start_cell = 0;
StyleInfo[] stylesArray = m_styles.Array;
for (i = 0; i < m_ast.Size(); i++)
{
int IndexToModify = (int)m_ast[i];
uint v = stylesArray[IndexToModify].start_cell;
stylesArray[IndexToModify].start_cell = start_cell;
start_cell += v;
}
num_cells = (int)m_Rasterizer.ScanlineNumCells((uint)m_scan_y);
m_Rasterizer.ScanlineCells((uint)m_scan_y, out cells, out cellOffset);
while (num_cells-- > 0)
{
curCellOffset = (int)cellOffset++;
style_id = (uint)((cells[curCellOffset].Left < 0) ? 0 :
cells[curCellOffset].Left - m_min_style + 1);
styleOffset = (int)style_id;
if (cells[curCellOffset].X == stylesArray[styleOffset].last_x)
{
cellOffset = stylesArray[styleOffset].start_cell + stylesArray[styleOffset].num_cells - 1;
unchecked
{
cells[cellOffset].Area += cells[curCellOffset].Area;
cells[cellOffset].Cover += cells[curCellOffset].Cover;
}
}
else
{
cellOffset = stylesArray[styleOffset].start_cell + stylesArray[styleOffset].num_cells;
cells[cellOffset].X = cells[curCellOffset].X;
cells[cellOffset].Area = cells[curCellOffset].Area;
cells[cellOffset].Cover = cells[curCellOffset].Cover;
stylesArray[styleOffset].last_x = cells[curCellOffset].X;
stylesArray[styleOffset].num_cells++;
}
style_id = (uint)((cells[curCellOffset].Right < 0) ? 0 :
cells[curCellOffset].Right - m_min_style + 1);
styleOffset = (int)style_id;
if (cells[curCellOffset].X == stylesArray[styleOffset].last_x)
{
cellOffset = stylesArray[styleOffset].start_cell + stylesArray[styleOffset].num_cells - 1;
unchecked
{
cells[cellOffset].Area -= cells[curCellOffset].Area;
cells[cellOffset].Cover -= cells[curCellOffset].Cover;
}
}
else
{
cellOffset = stylesArray[styleOffset].start_cell + stylesArray[styleOffset].num_cells;
cells[cellOffset].X = cells[curCellOffset].X;
cells[cellOffset].Area = -cells[curCellOffset].Area;
cells[cellOffset].Cover = -cells[curCellOffset].Cover;
stylesArray[styleOffset].last_x = cells[curCellOffset].X;
stylesArray[styleOffset].num_cells++;
}
}
}
if (m_ast.Size() > 1)
{
break;
}
++m_scan_y;
}
++m_scan_y;
if (m_layer_order != LayerOrder.Unsorted)
{
VectorPODRangeAdaptor ra = new VectorPODRangeAdaptor(m_ast, 1, m_ast.Size() - 1);
if (m_layer_order == LayerOrder.Direct)
{
QuickSortRangeAdaptorUint m_QSorter = new QuickSortRangeAdaptorUint();
m_QSorter.Sort(ra);
//quick_sort(ra, uint_greater);
}
else
{
throw new System.NotImplementedException();
//QuickSort_range_adaptor_uint m_QSorter = new QuickSort_range_adaptor_uint();
//m_QSorter.Sort(ra);
//quick_sort(ra, uint_less);
}
}
return(m_ast.Size() - 1);
}
