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#ifndef AGGRASTER_HPP
#define AGGRASTER_HPP
#include <libslic3r/SLA/RasterBase.hpp>
#include "libslic3r/ExPolygon.hpp"
#include "libslic3r/MTUtils.hpp"
#include <libnest2d/backends/clipper/clipper_polygon.hpp>
// For rasterizing
#include <agg/agg_basics.h>
#include <agg/agg_rendering_buffer.h>
#include <agg/agg_pixfmt_gray.h>
#include <agg/agg_pixfmt_rgb.h>
#include <agg/agg_renderer_base.h>
#include <agg/agg_renderer_scanline.h>
#include <agg/agg_scanline_p.h>
#include <agg/agg_rasterizer_scanline_aa.h>
#include <agg/agg_path_storage.h>
namespace Slic3r {
inline const Polygon& contour(const ExPolygon& p) { return p.contour; }
inline const ClipperLib::Path& contour(const ClipperLib::Polygon& p) { return p.Contour; }
inline const Polygons& holes(const ExPolygon& p) { return p.holes; }
inline const ClipperLib::Paths& holes(const ClipperLib::Polygon& p) { return p.Holes; }
namespace sla {
template<class Color> struct Colors {
static const Color White;
static const Color Black;
};
template<class Color> const Color Colors<Color>::White = Color{255};
template<class Color> const Color Colors<Color>::Black = Color{0};
template<class PixelRenderer,
template<class /*agg::renderer_base<PixelRenderer>*/> class Renderer,
class Rasterizer = agg::rasterizer_scanline_aa<>,
class Scanline = agg::scanline_p8>
class AGGRaster: public RasterBase {
public:
using TColor = typename PixelRenderer::color_type;
using TValue = typename TColor::value_type;
using TPixel = typename PixelRenderer::pixel_type;
using TRawBuffer = agg::rendering_buffer;
protected:
Resolution m_resolution;
PixelDim m_pxdim_scaled; // used for scaled coordinate polygons
std::vector<TPixel> m_buf;
agg::rendering_buffer m_rbuf;
PixelRenderer m_pixrenderer;
agg::renderer_base<PixelRenderer> m_raw_renderer;
Renderer<agg::renderer_base<PixelRenderer>> m_renderer;
Trafo m_trafo;
Scanline m_scanlines;
Rasterizer m_rasterizer;
void flipy(agg::path_storage &path) const
{
path.flip_y(0, double(m_resolution.height_px));
}
void flipx(agg::path_storage &path) const
{
path.flip_x(0, double(m_resolution.width_px));
}
double getPx(const Point &p) { return p(0) * m_pxdim_scaled.w_mm; }
double getPy(const Point &p) { return p(1) * m_pxdim_scaled.h_mm; }
agg::path_storage to_path(const Polygon &poly) { return to_path(poly.points); }
double getPx(const ClipperLib::IntPoint &p) { return p.X * m_pxdim_scaled.w_mm; }
double getPy(const ClipperLib::IntPoint& p) { return p.Y * m_pxdim_scaled.h_mm; }
template<class PointVec> agg::path_storage _to_path(const PointVec& v)
{
agg::path_storage path;
auto it = v.begin();
path.move_to(getPx(*it), getPy(*it));
while(++it != v.end()) path.line_to(getPx(*it), getPy(*it));
path.line_to(getPx(v.front()), getPy(v.front()));
return path;
}
template<class PointVec> agg::path_storage _to_path_flpxy(const PointVec& v)
{
agg::path_storage path;
auto it = v.begin();
path.move_to(getPy(*it), getPx(*it));
while(++it != v.end()) path.line_to(getPy(*it), getPx(*it));
path.line_to(getPy(v.front()), getPx(v.front()));
return path;
}
template<class PointVec> agg::path_storage to_path(const PointVec &v)
{
auto path = m_trafo.flipXY ? _to_path_flpxy(v) : _to_path(v);
path.translate_all_paths(m_trafo.center_x * m_pxdim_scaled.w_mm,
m_trafo.center_y * m_pxdim_scaled.h_mm);
if(m_trafo.mirror_x) flipx(path);
if(m_trafo.mirror_y) flipy(path);
return path;
}
template<class P> void _draw(const P &poly)
{
m_rasterizer.reset();
m_rasterizer.add_path(to_path(contour(poly)));
for(auto& h : holes(poly)) m_rasterizer.add_path(to_path(h));
agg::render_scanlines(m_rasterizer, m_scanlines, m_renderer);
}
public:
template<class GammaFn>
AGGRaster(const Resolution &res,
const PixelDim & pd,
const Trafo & trafo,
const TColor & foreground,
const TColor & background,
GammaFn && gammafn)
: m_resolution(res)
, m_pxdim_scaled(SCALING_FACTOR / pd.w_mm, SCALING_FACTOR / pd.h_mm)
, m_buf(res.pixels())
, m_rbuf(reinterpret_cast<TValue *>(m_buf.data()),
unsigned(res.width_px),
unsigned(res.height_px),
int(res.width_px *PixelRenderer::num_components))
, m_pixrenderer(m_rbuf)
, m_raw_renderer(m_pixrenderer)
, m_renderer(m_raw_renderer)
, m_trafo(trafo)
{
m_renderer.color(foreground);
clear(background);
m_rasterizer.gamma(gammafn);
}
Trafo trafo() const override { return m_trafo; }
Resolution resolution() const override { return m_resolution; }
PixelDim pixel_dimensions() const override
{
return {SCALING_FACTOR / m_pxdim_scaled.w_mm,
SCALING_FACTOR / m_pxdim_scaled.h_mm};
}
void draw(const ExPolygon &poly) override { _draw(poly); }
void draw(const ClipperLib::Polygon &poly) override { _draw(poly); }
EncodedRaster encode(RasterEncoder encoder) const override
{
return encoder(m_buf.data(), m_resolution.width_px, m_resolution.height_px, 1);
}
void clear(const TColor color) { m_raw_renderer.clear(color); }
};
/*
* Captures an anti-aliased monochrome canvas where vectorial
* polygons can be rasterized. Fill color is always white and the background is
* black. Contours are anti-aliased.
*
* A gamma function can be specified at compile time to make it more flexible.
*/
using _RasterGrayscaleAA =
AGGRaster<agg::pixfmt_gray8, agg::renderer_scanline_aa_solid>;
class RasterGrayscaleAA : public _RasterGrayscaleAA {
using Base = _RasterGrayscaleAA;
using typename Base::TColor;
using typename Base::TValue;
public:
template<class GammaFn>
RasterGrayscaleAA(const RasterBase::Resolution &res,
const RasterBase::PixelDim & pd,
const RasterBase::Trafo & trafo,
GammaFn && fn)
: Base(res, pd, trafo, Colors<TColor>::White, Colors<TColor>::Black,
std::forward<GammaFn>(fn))
{}
uint8_t read_pixel(size_t col, size_t row) const
{
static_assert(std::is_same<TValue, uint8_t>::value, "Not grayscale pix");
uint8_t px;
Base::m_buf[row * Base::resolution().width_px + col].get(px);
return px;
}
void clear() { Base::clear(Colors<TColor>::Black); }
};
class RasterGrayscaleAAGammaPower: public RasterGrayscaleAA {
public:
RasterGrayscaleAAGammaPower(const RasterBase::Resolution &res,
const RasterBase::PixelDim & pd,
const RasterBase::Trafo & trafo,
double gamma = 1.)
: RasterGrayscaleAA(res, pd, trafo, agg::gamma_power(gamma))
{}
};
}} // namespace Slic3r::sla
#endif // AGGRASTER_HPP
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