856 lines
34 KiB
C++
856 lines
34 KiB
C++
//----------------------------------------------------------------------------
|
|
// Anti-Grain Geometry - Version 2.4
|
|
// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
|
|
//
|
|
// Permission to copy, use, modify, sell and distribute this software
|
|
// is granted provided this copyright notice appears in all copies.
|
|
// This software is provided "as is" without express or implied
|
|
// warranty, and with no claim as to its suitability for any purpose.
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
// Contact: mcseem@antigrain.com
|
|
// mcseemagg@yahoo.com
|
|
// http://www.antigrain.com
|
|
//----------------------------------------------------------------------------
|
|
|
|
#ifndef AGG_RENDERER_SCANLINE_INCLUDED
|
|
#define AGG_RENDERER_SCANLINE_INCLUDED
|
|
|
|
#include <limits>
|
|
#include <cstdlib>
|
|
#include <cstring>
|
|
#include "agg_basics.h"
|
|
#include "agg_renderer_base.h"
|
|
|
|
namespace agg
|
|
{
|
|
|
|
//================================================render_scanline_aa_solid
|
|
template<class Scanline, class BaseRenderer, class ColorT>
|
|
void render_scanline_aa_solid(const Scanline& sl,
|
|
BaseRenderer& ren,
|
|
const ColorT& color)
|
|
{
|
|
int y = sl.y();
|
|
unsigned num_spans = sl.num_spans();
|
|
typename Scanline::const_iterator span = sl.begin();
|
|
|
|
for(;;)
|
|
{
|
|
int x = span->x;
|
|
if(span->len > 0)
|
|
{
|
|
ren.blend_solid_hspan(x, y, (unsigned)span->len,
|
|
color,
|
|
span->covers);
|
|
}
|
|
else
|
|
{
|
|
ren.blend_hline(x, y, (unsigned)(x - span->len - 1),
|
|
color,
|
|
*(span->covers));
|
|
}
|
|
if(--num_spans == 0) break;
|
|
++span;
|
|
}
|
|
}
|
|
|
|
//===============================================render_scanlines_aa_solid
|
|
template<class Rasterizer, class Scanline,
|
|
class BaseRenderer, class ColorT>
|
|
void render_scanlines_aa_solid(Rasterizer& ras, Scanline& sl,
|
|
BaseRenderer& ren, const ColorT& color)
|
|
{
|
|
if(ras.rewind_scanlines())
|
|
{
|
|
// Explicitly convert "color" to the BaseRenderer color type.
|
|
// For example, it can be called with color type "rgba", while
|
|
// "rgba8" is needed. Otherwise it will be implicitly
|
|
// converted in the loop many times.
|
|
//----------------------
|
|
typename BaseRenderer::color_type ren_color = color;
|
|
|
|
sl.reset(ras.min_x(), ras.max_x());
|
|
while(ras.sweep_scanline(sl))
|
|
{
|
|
//render_scanline_aa_solid(sl, ren, ren_color);
|
|
|
|
// This code is equivalent to the above call (copy/paste).
|
|
// It's just a "manual" optimization for old compilers,
|
|
// like Microsoft Visual C++ v6.0
|
|
//-------------------------------
|
|
int y = sl.y();
|
|
unsigned num_spans = sl.num_spans();
|
|
typename Scanline::const_iterator span = sl.begin();
|
|
|
|
for(;;)
|
|
{
|
|
int x = span->x;
|
|
if(span->len > 0)
|
|
{
|
|
ren.blend_solid_hspan(x, y, (unsigned)span->len,
|
|
ren_color,
|
|
span->covers);
|
|
}
|
|
else
|
|
{
|
|
ren.blend_hline(x, y, (unsigned)(x - span->len - 1),
|
|
ren_color,
|
|
*(span->covers));
|
|
}
|
|
if(--num_spans == 0) break;
|
|
++span;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//==============================================renderer_scanline_aa_solid
|
|
template<class BaseRenderer> class renderer_scanline_aa_solid
|
|
{
|
|
public:
|
|
typedef BaseRenderer base_ren_type;
|
|
typedef typename base_ren_type::color_type color_type;
|
|
|
|
//--------------------------------------------------------------------
|
|
renderer_scanline_aa_solid() : m_ren(0) {}
|
|
explicit renderer_scanline_aa_solid(base_ren_type& ren) : m_ren(&ren) {}
|
|
void attach(base_ren_type& ren)
|
|
{
|
|
m_ren = &ren;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
void color(const color_type& c) { m_color = c; }
|
|
const color_type& color() const { return m_color; }
|
|
|
|
//--------------------------------------------------------------------
|
|
void prepare() {}
|
|
|
|
//--------------------------------------------------------------------
|
|
template<class Scanline> void render(const Scanline& sl)
|
|
{
|
|
render_scanline_aa_solid(sl, *m_ren, m_color);
|
|
}
|
|
|
|
private:
|
|
base_ren_type* m_ren;
|
|
color_type m_color;
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//======================================================render_scanline_aa
|
|
template<class Scanline, class BaseRenderer,
|
|
class SpanAllocator, class SpanGenerator>
|
|
void render_scanline_aa(const Scanline& sl, BaseRenderer& ren,
|
|
SpanAllocator& alloc, SpanGenerator& span_gen)
|
|
{
|
|
int y = sl.y();
|
|
|
|
unsigned num_spans = sl.num_spans();
|
|
typename Scanline::const_iterator span = sl.begin();
|
|
for(;;)
|
|
{
|
|
int x = span->x;
|
|
int len = span->len;
|
|
const typename Scanline::cover_type* covers = span->covers;
|
|
|
|
if(len < 0) len = -len;
|
|
typename BaseRenderer::color_type* colors = alloc.allocate(len);
|
|
span_gen.generate(colors, x, y, len);
|
|
ren.blend_color_hspan(x, y, len, colors,
|
|
(span->len < 0) ? 0 : covers, *covers);
|
|
|
|
if(--num_spans == 0) break;
|
|
++span;
|
|
}
|
|
}
|
|
|
|
//=====================================================render_scanlines_aa
|
|
template<class Rasterizer, class Scanline, class BaseRenderer,
|
|
class SpanAllocator, class SpanGenerator>
|
|
void render_scanlines_aa(Rasterizer& ras, Scanline& sl, BaseRenderer& ren,
|
|
SpanAllocator& alloc, SpanGenerator& span_gen)
|
|
{
|
|
if(ras.rewind_scanlines())
|
|
{
|
|
sl.reset(ras.min_x(), ras.max_x());
|
|
span_gen.prepare();
|
|
while(ras.sweep_scanline(sl))
|
|
{
|
|
render_scanline_aa(sl, ren, alloc, span_gen);
|
|
}
|
|
}
|
|
}
|
|
|
|
//====================================================renderer_scanline_aa
|
|
template<class BaseRenderer, class SpanAllocator, class SpanGenerator>
|
|
class renderer_scanline_aa
|
|
{
|
|
public:
|
|
typedef BaseRenderer base_ren_type;
|
|
typedef SpanAllocator alloc_type;
|
|
typedef SpanGenerator span_gen_type;
|
|
|
|
//--------------------------------------------------------------------
|
|
renderer_scanline_aa() : m_ren(0), m_alloc(0), m_span_gen(0) {}
|
|
renderer_scanline_aa(base_ren_type& ren,
|
|
alloc_type& alloc,
|
|
span_gen_type& span_gen) :
|
|
m_ren(&ren),
|
|
m_alloc(&alloc),
|
|
m_span_gen(&span_gen)
|
|
{}
|
|
void attach(base_ren_type& ren,
|
|
alloc_type& alloc,
|
|
span_gen_type& span_gen)
|
|
{
|
|
m_ren = &ren;
|
|
m_alloc = &alloc;
|
|
m_span_gen = &span_gen;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
void prepare() { m_span_gen->prepare(); }
|
|
|
|
//--------------------------------------------------------------------
|
|
template<class Scanline> void render(const Scanline& sl)
|
|
{
|
|
render_scanline_aa(sl, *m_ren, *m_alloc, *m_span_gen);
|
|
}
|
|
|
|
private:
|
|
base_ren_type* m_ren;
|
|
alloc_type* m_alloc;
|
|
span_gen_type* m_span_gen;
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//===============================================render_scanline_bin_solid
|
|
template<class Scanline, class BaseRenderer, class ColorT>
|
|
void render_scanline_bin_solid(const Scanline& sl,
|
|
BaseRenderer& ren,
|
|
const ColorT& color)
|
|
{
|
|
unsigned num_spans = sl.num_spans();
|
|
typename Scanline::const_iterator span = sl.begin();
|
|
for(;;)
|
|
{
|
|
ren.blend_hline(span->x,
|
|
sl.y(),
|
|
span->x - 1 + ((span->len < 0) ?
|
|
-span->len :
|
|
span->len),
|
|
color,
|
|
cover_full);
|
|
if(--num_spans == 0) break;
|
|
++span;
|
|
}
|
|
}
|
|
|
|
//==============================================render_scanlines_bin_solid
|
|
template<class Rasterizer, class Scanline,
|
|
class BaseRenderer, class ColorT>
|
|
void render_scanlines_bin_solid(Rasterizer& ras, Scanline& sl,
|
|
BaseRenderer& ren, const ColorT& color)
|
|
{
|
|
if(ras.rewind_scanlines())
|
|
{
|
|
// Explicitly convert "color" to the BaseRenderer color type.
|
|
// For example, it can be called with color type "rgba", while
|
|
// "rgba8" is needed. Otherwise it will be implicitly
|
|
// converted in the loop many times.
|
|
//----------------------
|
|
typename BaseRenderer::color_type ren_color(color);
|
|
|
|
sl.reset(ras.min_x(), ras.max_x());
|
|
while(ras.sweep_scanline(sl))
|
|
{
|
|
//render_scanline_bin_solid(sl, ren, ren_color);
|
|
|
|
// This code is equivalent to the above call (copy/paste).
|
|
// It's just a "manual" optimization for old compilers,
|
|
// like Microsoft Visual C++ v6.0
|
|
//-------------------------------
|
|
unsigned num_spans = sl.num_spans();
|
|
typename Scanline::const_iterator span = sl.begin();
|
|
for(;;)
|
|
{
|
|
ren.blend_hline(span->x,
|
|
sl.y(),
|
|
span->x - 1 + ((span->len < 0) ?
|
|
-span->len :
|
|
span->len),
|
|
ren_color,
|
|
cover_full);
|
|
if(--num_spans == 0) break;
|
|
++span;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//=============================================renderer_scanline_bin_solid
|
|
template<class BaseRenderer> class renderer_scanline_bin_solid
|
|
{
|
|
public:
|
|
typedef BaseRenderer base_ren_type;
|
|
typedef typename base_ren_type::color_type color_type;
|
|
|
|
//--------------------------------------------------------------------
|
|
renderer_scanline_bin_solid() : m_ren(0) {}
|
|
explicit renderer_scanline_bin_solid(base_ren_type& ren) : m_ren(&ren) {}
|
|
void attach(base_ren_type& ren)
|
|
{
|
|
m_ren = &ren;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
void color(const color_type& c) { m_color = c; }
|
|
const color_type& color() const { return m_color; }
|
|
|
|
//--------------------------------------------------------------------
|
|
void prepare() {}
|
|
|
|
//--------------------------------------------------------------------
|
|
template<class Scanline> void render(const Scanline& sl)
|
|
{
|
|
render_scanline_bin_solid(sl, *m_ren, m_color);
|
|
}
|
|
|
|
private:
|
|
base_ren_type* m_ren;
|
|
color_type m_color;
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//======================================================render_scanline_bin
|
|
template<class Scanline, class BaseRenderer,
|
|
class SpanAllocator, class SpanGenerator>
|
|
void render_scanline_bin(const Scanline& sl, BaseRenderer& ren,
|
|
SpanAllocator& alloc, SpanGenerator& span_gen)
|
|
{
|
|
int y = sl.y();
|
|
|
|
unsigned num_spans = sl.num_spans();
|
|
typename Scanline::const_iterator span = sl.begin();
|
|
for(;;)
|
|
{
|
|
int x = span->x;
|
|
int len = span->len;
|
|
if(len < 0) len = -len;
|
|
typename BaseRenderer::color_type* colors = alloc.allocate(len);
|
|
span_gen.generate(colors, x, y, len);
|
|
ren.blend_color_hspan(x, y, len, colors, 0, cover_full);
|
|
if(--num_spans == 0) break;
|
|
++span;
|
|
}
|
|
}
|
|
|
|
//=====================================================render_scanlines_bin
|
|
template<class Rasterizer, class Scanline, class BaseRenderer,
|
|
class SpanAllocator, class SpanGenerator>
|
|
void render_scanlines_bin(Rasterizer& ras, Scanline& sl, BaseRenderer& ren,
|
|
SpanAllocator& alloc, SpanGenerator& span_gen)
|
|
{
|
|
if(ras.rewind_scanlines())
|
|
{
|
|
sl.reset(ras.min_x(), ras.max_x());
|
|
span_gen.prepare();
|
|
while(ras.sweep_scanline(sl))
|
|
{
|
|
render_scanline_bin(sl, ren, alloc, span_gen);
|
|
}
|
|
}
|
|
}
|
|
|
|
//====================================================renderer_scanline_bin
|
|
template<class BaseRenderer, class SpanAllocator, class SpanGenerator>
|
|
class renderer_scanline_bin
|
|
{
|
|
public:
|
|
typedef BaseRenderer base_ren_type;
|
|
typedef SpanAllocator alloc_type;
|
|
typedef SpanGenerator span_gen_type;
|
|
|
|
//--------------------------------------------------------------------
|
|
renderer_scanline_bin() : m_ren(0), m_alloc(0), m_span_gen(0) {}
|
|
renderer_scanline_bin(base_ren_type& ren,
|
|
alloc_type& alloc,
|
|
span_gen_type& span_gen) :
|
|
m_ren(&ren),
|
|
m_alloc(&alloc),
|
|
m_span_gen(&span_gen)
|
|
{}
|
|
void attach(base_ren_type& ren,
|
|
alloc_type& alloc,
|
|
span_gen_type& span_gen)
|
|
{
|
|
m_ren = &ren;
|
|
m_alloc = &alloc;
|
|
m_span_gen = &span_gen;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
void prepare() { m_span_gen->prepare(); }
|
|
|
|
//--------------------------------------------------------------------
|
|
template<class Scanline> void render(const Scanline& sl)
|
|
{
|
|
render_scanline_bin(sl, *m_ren, *m_alloc, *m_span_gen);
|
|
}
|
|
|
|
private:
|
|
base_ren_type* m_ren;
|
|
alloc_type* m_alloc;
|
|
span_gen_type* m_span_gen;
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//========================================================render_scanlines
|
|
template<class Rasterizer, class Scanline, class Renderer>
|
|
void render_scanlines(Rasterizer& ras, Scanline& sl, Renderer& ren)
|
|
{
|
|
if(ras.rewind_scanlines())
|
|
{
|
|
sl.reset(ras.min_x(), ras.max_x());
|
|
ren.prepare();
|
|
while(ras.sweep_scanline(sl))
|
|
{
|
|
ren.render(sl);
|
|
}
|
|
}
|
|
}
|
|
|
|
//========================================================render_all_paths
|
|
template<class Rasterizer, class Scanline, class Renderer,
|
|
class VertexSource, class ColorStorage, class PathId>
|
|
void render_all_paths(Rasterizer& ras,
|
|
Scanline& sl,
|
|
Renderer& r,
|
|
VertexSource& vs,
|
|
const ColorStorage& as,
|
|
const PathId& path_id,
|
|
unsigned num_paths)
|
|
{
|
|
for(unsigned i = 0; i < num_paths; i++)
|
|
{
|
|
ras.reset();
|
|
ras.add_path(vs, path_id[i]);
|
|
r.color(as[i]);
|
|
render_scanlines(ras, sl, r);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//=============================================render_scanlines_compound
|
|
template<class Rasterizer,
|
|
class ScanlineAA,
|
|
class ScanlineBin,
|
|
class BaseRenderer,
|
|
class SpanAllocator,
|
|
class StyleHandler>
|
|
void render_scanlines_compound(Rasterizer& ras,
|
|
ScanlineAA& sl_aa,
|
|
ScanlineBin& sl_bin,
|
|
BaseRenderer& ren,
|
|
SpanAllocator& alloc,
|
|
StyleHandler& sh)
|
|
{
|
|
if(ras.rewind_scanlines())
|
|
{
|
|
int min_x = ras.min_x();
|
|
int len = ras.max_x() - min_x + 2;
|
|
sl_aa.reset(min_x, ras.max_x());
|
|
sl_bin.reset(min_x, ras.max_x());
|
|
|
|
typedef typename BaseRenderer::color_type color_type;
|
|
color_type* color_span = alloc.allocate(len * 2);
|
|
color_type* mix_buffer = color_span + len;
|
|
unsigned num_spans;
|
|
|
|
unsigned num_styles;
|
|
unsigned style;
|
|
bool solid;
|
|
while((num_styles = ras.sweep_styles()) > 0)
|
|
{
|
|
typename ScanlineAA::const_iterator span_aa;
|
|
if(num_styles == 1)
|
|
{
|
|
// Optimization for a single style. Happens often
|
|
//-------------------------
|
|
if(ras.sweep_scanline(sl_aa, 0))
|
|
{
|
|
style = ras.style(0);
|
|
if(sh.is_solid(style))
|
|
{
|
|
// Just solid fill
|
|
//-----------------------
|
|
render_scanline_aa_solid(sl_aa, ren, sh.color(style));
|
|
}
|
|
else
|
|
{
|
|
// Arbitrary span generator
|
|
//-----------------------
|
|
span_aa = sl_aa.begin();
|
|
num_spans = sl_aa.num_spans();
|
|
for(;;)
|
|
{
|
|
len = span_aa->len;
|
|
sh.generate_span(color_span,
|
|
span_aa->x,
|
|
sl_aa.y(),
|
|
len,
|
|
style);
|
|
|
|
ren.blend_color_hspan(span_aa->x,
|
|
sl_aa.y(),
|
|
span_aa->len,
|
|
color_span,
|
|
span_aa->covers);
|
|
if(--num_spans == 0) break;
|
|
++span_aa;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if(ras.sweep_scanline(sl_bin, -1))
|
|
{
|
|
// Clear the spans of the mix_buffer
|
|
//--------------------
|
|
typename ScanlineBin::const_iterator span_bin = sl_bin.begin();
|
|
num_spans = sl_bin.num_spans();
|
|
for(;;)
|
|
{
|
|
std::memset(mix_buffer + span_bin->x - min_x,
|
|
0,
|
|
span_bin->len * sizeof(color_type));
|
|
|
|
if(--num_spans == 0) break;
|
|
++span_bin;
|
|
}
|
|
|
|
unsigned i;
|
|
for(i = 0; i < num_styles; i++)
|
|
{
|
|
style = ras.style(i);
|
|
solid = sh.is_solid(style);
|
|
|
|
if(ras.sweep_scanline(sl_aa, i))
|
|
{
|
|
color_type* colors;
|
|
color_type* cspan;
|
|
typename ScanlineAA::cover_type* covers;
|
|
span_aa = sl_aa.begin();
|
|
num_spans = sl_aa.num_spans();
|
|
if(solid)
|
|
{
|
|
// Just solid fill
|
|
//-----------------------
|
|
for(;;)
|
|
{
|
|
color_type c = sh.color(style);
|
|
len = span_aa->len;
|
|
colors = mix_buffer + span_aa->x - min_x;
|
|
covers = span_aa->covers;
|
|
do
|
|
{
|
|
if(*covers == cover_full)
|
|
{
|
|
*colors = c;
|
|
}
|
|
else
|
|
{
|
|
colors->add(c, *covers);
|
|
}
|
|
++colors;
|
|
++covers;
|
|
}
|
|
while(--len);
|
|
if(--num_spans == 0) break;
|
|
++span_aa;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// Arbitrary span generator
|
|
//-----------------------
|
|
for(;;)
|
|
{
|
|
len = span_aa->len;
|
|
colors = mix_buffer + span_aa->x - min_x;
|
|
cspan = color_span;
|
|
sh.generate_span(cspan,
|
|
span_aa->x,
|
|
sl_aa.y(),
|
|
len,
|
|
style);
|
|
covers = span_aa->covers;
|
|
do
|
|
{
|
|
if(*covers == cover_full)
|
|
{
|
|
*colors = *cspan;
|
|
}
|
|
else
|
|
{
|
|
colors->add(*cspan, *covers);
|
|
}
|
|
++cspan;
|
|
++colors;
|
|
++covers;
|
|
}
|
|
while(--len);
|
|
if(--num_spans == 0) break;
|
|
++span_aa;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Emit the blended result as a color hspan
|
|
//-------------------------
|
|
span_bin = sl_bin.begin();
|
|
num_spans = sl_bin.num_spans();
|
|
for(;;)
|
|
{
|
|
ren.blend_color_hspan(span_bin->x,
|
|
sl_bin.y(),
|
|
span_bin->len,
|
|
mix_buffer + span_bin->x - min_x,
|
|
0,
|
|
cover_full);
|
|
if(--num_spans == 0) break;
|
|
++span_bin;
|
|
}
|
|
} // if(ras.sweep_scanline(sl_bin, -1))
|
|
} // if(num_styles == 1) ... else
|
|
} // while((num_styles = ras.sweep_styles()) > 0)
|
|
} // if(ras.rewind_scanlines())
|
|
}
|
|
|
|
//=======================================render_scanlines_compound_layered
|
|
template<class Rasterizer,
|
|
class ScanlineAA,
|
|
class BaseRenderer,
|
|
class SpanAllocator,
|
|
class StyleHandler>
|
|
void render_scanlines_compound_layered(Rasterizer& ras,
|
|
ScanlineAA& sl_aa,
|
|
BaseRenderer& ren,
|
|
SpanAllocator& alloc,
|
|
StyleHandler& sh)
|
|
{
|
|
if(ras.rewind_scanlines())
|
|
{
|
|
int min_x = ras.min_x();
|
|
int len = ras.max_x() - min_x + 2;
|
|
sl_aa.reset(min_x, ras.max_x());
|
|
|
|
typedef typename BaseRenderer::color_type color_type;
|
|
color_type* color_span = alloc.allocate(len * 2);
|
|
color_type* mix_buffer = color_span + len;
|
|
cover_type* cover_buffer = ras.allocate_cover_buffer(len);
|
|
unsigned num_spans;
|
|
|
|
unsigned num_styles;
|
|
unsigned style;
|
|
bool solid;
|
|
while((num_styles = ras.sweep_styles()) > 0)
|
|
{
|
|
typename ScanlineAA::const_iterator span_aa;
|
|
if(num_styles == 1)
|
|
{
|
|
// Optimization for a single style. Happens often
|
|
//-------------------------
|
|
if(ras.sweep_scanline(sl_aa, 0))
|
|
{
|
|
style = ras.style(0);
|
|
if(sh.is_solid(style))
|
|
{
|
|
// Just solid fill
|
|
//-----------------------
|
|
render_scanline_aa_solid(sl_aa, ren, sh.color(style));
|
|
}
|
|
else
|
|
{
|
|
// Arbitrary span generator
|
|
//-----------------------
|
|
span_aa = sl_aa.begin();
|
|
num_spans = sl_aa.num_spans();
|
|
for(;;)
|
|
{
|
|
len = span_aa->len;
|
|
sh.generate_span(color_span,
|
|
span_aa->x,
|
|
sl_aa.y(),
|
|
len,
|
|
style);
|
|
|
|
ren.blend_color_hspan(span_aa->x,
|
|
sl_aa.y(),
|
|
span_aa->len,
|
|
color_span,
|
|
span_aa->covers);
|
|
if(--num_spans == 0) break;
|
|
++span_aa;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
int sl_start = ras.scanline_start();
|
|
unsigned sl_len = ras.scanline_length();
|
|
|
|
if(sl_len)
|
|
{
|
|
std::memset(mix_buffer + sl_start - min_x,
|
|
0,
|
|
sl_len * sizeof(color_type));
|
|
|
|
std::memset(cover_buffer + sl_start - min_x,
|
|
0,
|
|
sl_len * sizeof(cover_type));
|
|
|
|
int sl_y = std::numeric_limits<int>::max();
|
|
unsigned i;
|
|
for(i = 0; i < num_styles; i++)
|
|
{
|
|
style = ras.style(i);
|
|
solid = sh.is_solid(style);
|
|
|
|
if(ras.sweep_scanline(sl_aa, i))
|
|
{
|
|
unsigned cover;
|
|
color_type* colors;
|
|
color_type* cspan;
|
|
cover_type* src_covers;
|
|
cover_type* dst_covers;
|
|
span_aa = sl_aa.begin();
|
|
num_spans = sl_aa.num_spans();
|
|
sl_y = sl_aa.y();
|
|
if(solid)
|
|
{
|
|
// Just solid fill
|
|
//-----------------------
|
|
for(;;)
|
|
{
|
|
color_type c = sh.color(style);
|
|
len = span_aa->len;
|
|
colors = mix_buffer + span_aa->x - min_x;
|
|
src_covers = span_aa->covers;
|
|
dst_covers = cover_buffer + span_aa->x - min_x;
|
|
do
|
|
{
|
|
cover = *src_covers;
|
|
if(*dst_covers + cover > cover_full)
|
|
{
|
|
cover = cover_full - *dst_covers;
|
|
}
|
|
if(cover)
|
|
{
|
|
colors->add(c, cover);
|
|
*dst_covers += cover;
|
|
}
|
|
++colors;
|
|
++src_covers;
|
|
++dst_covers;
|
|
}
|
|
while(--len);
|
|
if(--num_spans == 0) break;
|
|
++span_aa;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// Arbitrary span generator
|
|
//-----------------------
|
|
for(;;)
|
|
{
|
|
len = span_aa->len;
|
|
colors = mix_buffer + span_aa->x - min_x;
|
|
cspan = color_span;
|
|
sh.generate_span(cspan,
|
|
span_aa->x,
|
|
sl_aa.y(),
|
|
len,
|
|
style);
|
|
src_covers = span_aa->covers;
|
|
dst_covers = cover_buffer + span_aa->x - min_x;
|
|
do
|
|
{
|
|
cover = *src_covers;
|
|
if(*dst_covers + cover > cover_full)
|
|
{
|
|
cover = cover_full - *dst_covers;
|
|
}
|
|
if(cover)
|
|
{
|
|
colors->add(*cspan, cover);
|
|
*dst_covers += cover;
|
|
}
|
|
++cspan;
|
|
++colors;
|
|
++src_covers;
|
|
++dst_covers;
|
|
}
|
|
while(--len);
|
|
if(--num_spans == 0) break;
|
|
++span_aa;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
ren.blend_color_hspan(sl_start,
|
|
sl_y,
|
|
sl_len,
|
|
mix_buffer + sl_start - min_x,
|
|
0,
|
|
cover_full);
|
|
} //if(sl_len)
|
|
} //if(num_styles == 1) ... else
|
|
} //while((num_styles = ras.sweep_styles()) > 0)
|
|
} //if(ras.rewind_scanlines())
|
|
}
|
|
|
|
|
|
}
|
|
|
|
#endif
|