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ndarray_canvas.h
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ndarray_canvas.h
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// The MIT License (MIT)
//
// Copyright (c) 2014-2015 WUSTL ZPLAB
// Copyright (c) 2016-2021 Celiagg Contributors
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//
// Authors: Erik Hvatum <[email protected]>
// John Wiggins
#pragma once
#define _USE_MATH_DEFINES
#include <cmath>
#include <agg_alpha_mask_u8.h>
#include <agg_bezier_arc.h>
#include <agg_bspline.h>
#include <agg_conv_bspline.h>
#include <agg_conv_contour.h>
#include <agg_conv_curve.h>
#include <agg_conv_dash.h>
#include <agg_conv_stroke.h>
#include <agg_path_storage.h>
#include <agg_pixfmt_amask_adaptor.h>
#include <agg_pixfmt_gray.h>
#include <agg_pixfmt_rgb.h>
#include <agg_pixfmt_rgba.h>
#include <agg_rasterizer_scanline_aa.h>
#include <agg_renderer_base.h>
#include <agg_renderer_scanline.h>
#include <agg_rendering_buffer.h>
#include <agg_scanline_p.h>
#include <ctrl/agg_polygon_ctrl.h>
#include "font_cache.h"
#include "glyph_iter.h"
#include "graphics_state.h"
#include "image.h"
#include "paint.h"
#include "vertex_source.h"
// Interface to ndarray_canvas that is generic for all pixfmts, for the
// convenience of being able to implement functionality common to cython
// wrappers of ndarray_canvas template instances representing pixfmts
// in a cython base class.
class ndarray_canvas_base
{
public:
virtual ~ndarray_canvas_base(){}
virtual const size_t channel_count() const = 0;
virtual unsigned width() const = 0;
virtual unsigned height() const = 0;
virtual void clear(const double r, const double g,
const double b, const double a) = 0;
virtual void draw_image(Image& img,
const agg::trans_affine& transform,
const GraphicsState& gs) = 0;
virtual void draw_shape(VertexSource& shape,
const agg::trans_affine& transform,
Paint& linePaint, Paint& fillPaint,
const GraphicsState& gs) = 0;
virtual void draw_shape_at_points(VertexSource& shape,
const double* points,
const size_t point_count,
const agg::trans_affine& transform,
Paint& linePaint, Paint& fillPaint,
const GraphicsState& gs) = 0;
virtual void draw_text(const char* text, Font& font,
const agg::trans_affine& transform,
Paint& linePaint, Paint& fillPaint,
const GraphicsState& gs) = 0;
};
template<typename pixfmt_t>
class ndarray_canvas : public ndarray_canvas_base
{
public:
ndarray_canvas(unsigned char* buf,
const unsigned width, const unsigned height, const int stride,
const size_t channel_count, FontCache& cache,
const bool bottom_up = false);
virtual ~ndarray_canvas() {}
const size_t channel_count() const;
unsigned width() const;
unsigned height() const;
void clear(const double r, const double g, const double b, const double a = 1.0);
void draw_image(Image& img,
const agg::trans_affine& transform,
const GraphicsState& gs);
void draw_shape(VertexSource& shape,
const agg::trans_affine& transform,
Paint& linePaint, Paint& fillPaint,
const GraphicsState& gs);
void draw_shape_at_points(VertexSource& shape,
const double* points,
const size_t point_count,
const agg::trans_affine& transform,
Paint& linePaint, Paint& fillPaint,
const GraphicsState& gs);
void draw_text(const char* text, Font& font,
const agg::trans_affine& transform,
Paint& linePaint, Paint& fillPaint,
const GraphicsState& gs);
protected:
typedef agg::amask_no_clip_gray8 alpha_mask_t;
typedef agg::pixfmt_amask_adaptor<pixfmt_t, alpha_mask_t> masked_pxfmt_t;
typedef agg::renderer_base<masked_pxfmt_t> masked_renderer_t;
typedef agg::renderer_base<pixfmt_t> renderer_t;
typedef agg::rasterizer_scanline_aa<> rasterizer_t;
size_t m_channel_count;
FontCache& m_font_cache;
agg::rendering_buffer m_renbuf;
pixfmt_t m_pixfmt;
renderer_t m_renderer;
rasterizer_t m_rasterizer;
agg::scanline_p8 m_scanline;
bool m_bottom_up;
private:
template<typename base_renderer_t, typename span_gen_t>
void _draw_image_internal(Image& img,
const agg::trans_affine& transform,
const GraphicsState& gs,
base_renderer_t& renderer);
template<typename base_renderer_t>
void _draw_shape_internal(VertexSource& shape,
const agg::trans_affine& transform,
Paint& linePaint, Paint& fillPaint,
const GraphicsState& gs,
base_renderer_t& renderer);
template<typename base_renderer_t>
void _draw_shape_stroke_setup(VertexSource& shape,
const agg::trans_affine& mtx,
Paint& paint,
const GraphicsState& gs,
base_renderer_t& renderer);
template<typename stroke_t, typename base_renderer_t>
void _draw_shape_stroke_final(stroke_t& stroke,
const agg::trans_affine& mtx,
Paint& paint,
const GraphicsState& gs,
base_renderer_t& renderer);
template<typename base_renderer_t>
void _draw_text_internal(const char* text, Font& font,
const agg::trans_affine& transform,
Paint& linePaint, Paint& fillPaint,
const GraphicsState& gs,
base_renderer_t& renderer);
template<typename base_renderer_t>
void _draw_text_raster(GlyphIterator& iterator,
Font& font,
const agg::trans_affine& transform,
Paint& fillPaint,
const GraphicsState& gs,
base_renderer_t& renderer);
template<typename base_renderer_t>
void _draw_text_vector(GlyphIterator& iterator,
Font& font,
const agg::trans_affine& transform,
Paint& linePaint, Paint& fillPaint,
const GraphicsState& gs,
base_renderer_t& renderer);
GraphicsState::DrawingMode _convert_text_mode(const GraphicsState::TextDrawingMode tm);
inline void _set_aa(const bool& aa);
inline void _set_clipping(const GraphicsState::Rect& rect);
private:
// Target buffer/numpy array must be supplied to constructor. The following line ensures that no default
// constructor is user-accessible, even if the buffer-accepting constructor is deleted (presence of a constructor
// taking one or more parameters suppresses automatic default constructor generation).
ndarray_canvas(){}
// ndarray_canvases are non-copyable in order to dodge the question of whether a copied ndarray_canvas refers to the
// original's buffer/numpy array or receives its own copy. The compiler does autogenerate assignment and copy
// constructors if these are not defined; so, we define them such that they are not user-accessible.
ndarray_canvas(const ndarray_canvas&){}
ndarray_canvas& operator = (const ndarray_canvas&){ return *this; }
};
#include "ndarray_canvas.hxx"