Replace agg with skia

core/src/fxge/agg/agg23/agg_rasterizer_scanline_aa.h

Index: core/src/fxge/agg/agg23/agg_rasterizer_scanline_aa.h
diff --git a/core/src/fxge/agg/agg23/agg_rasterizer_scanline_aa.h b/core/src/fxge/agg/agg23/agg_rasterizer_scanline_aa.h
deleted file mode 100644
index e9f0defbe89c987acabb173d42b77ea010f3ff16..0000000000000000000000000000000000000000
--- a/core/src/fxge/agg/agg23/agg_rasterizer_scanline_aa.h
+++ /dev/null
@@ -1,472 +0,0 @@
-
-//----------------------------------------------------------------------------
-// Anti-Grain Geometry - Version 2.3
-// 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.
-//
-//----------------------------------------------------------------------------
-//
-// The author gratefully acknowleges the support of David Turner,
-// Robert Wilhelm, and Werner Lemberg - the authors of the FreeType
-// libray - in producing this work. See http://www.freetype.org for details.
-//
-//----------------------------------------------------------------------------
-// Contact: mcseem@antigrain.com
-//          mcseemagg@yahoo.com
-//          http://www.antigrain.com
-//----------------------------------------------------------------------------
-//
-// Adaptation for 32-bit screen coordinates has been sponsored by
-// Liberty Technology Systems, Inc., visit http://lib-sys.com
-//
-// Liberty Technology Systems, Inc. is the provider of
-// PostScript and PDF technology for software developers.
-//
-//----------------------------------------------------------------------------
-#ifndef AGG_RASTERIZER_SCANLINE_AA_INCLUDED
-#define AGG_RASTERIZER_SCANLINE_AA_INCLUDED
-#include "../../../../include/fxge/fx_ge.h"
-#include "agg_basics.h"
-#include "agg_math.h"
-#include "agg_array.h"
-#include "agg_clip_liang_barsky.h"
-#include "agg_render_scanlines.h"
-namespace agg
-{
-enum poly_base_scale_e {
-    poly_base_shift = 8,
-    poly_base_size  = 1 << poly_base_shift,
-    poly_base_mask  = poly_base_size - 1
-};
-inline int poly_coord(FX_FLOAT c)
-{
-    return int(c * poly_base_size);
-}
-struct cell_aa : public CFX_Object {
-    int x;
-    int y;
-    int cover;
-    int area;
-    void set(int x, int y, int c, int a);
-    void set_coord(int x, int y);
-    void set_cover(int c, int a);
-    void add_cover(int c, int a);
-};
-class outline_aa : public CFX_Object
-{
-    enum cell_block_scale_e {
-        cell_block_shift = 12,
-        cell_block_size  = 1 << cell_block_shift,
-        cell_block_mask  = cell_block_size - 1,
-        cell_block_pool  = 256,
-        cell_block_limit = 1024
-    };
-    struct sorted_y : public CFX_Object {
-        unsigned start;
-        unsigned num;
-    };
-public:
-    ~outline_aa();
-    outline_aa();
-    void reset();
-    void move_to(int x, int y);
-    void line_to(int x, int y);
-    int min_x() const
-    {
-        return m_min_x;
-    }
-    int min_y() const
-    {
-        return m_min_y;
-    }
-    int max_x() const
-    {
-        return m_max_x;
-    }
-    int max_y() const
-    {
-        return m_max_y;
-    }
-    void sort_cells();
-    unsigned total_cells() const
-    {
-        return m_num_cells;
-    }
-    unsigned scanline_num_cells(unsigned y) const
-    {
-        return m_sorted_y[y - m_min_y].num;
-    }
-    const cell_aa* const* scanline_cells(unsigned y) const
-    {
-        return m_sorted_cells.data() + m_sorted_y[y - m_min_y].start;
-    }
-    bool sorted() const
-    {
-        return m_sorted;
-    }
-private:
-    outline_aa(const outline_aa&);
-    const outline_aa& operator = (const outline_aa&);
-    void set_cur_cell(int x, int y);
-    void add_cur_cell();
-    void render_hline(int ey, int x1, int y1, int x2, int y2);
-    void render_line(int x1, int y1, int x2, int y2);
-    void allocate_block();
-private:
-    unsigned  m_num_blocks;
-    unsigned  m_max_blocks;
-    unsigned  m_cur_block;
-    unsigned  m_num_cells;
-    cell_aa** m_cells;
-    cell_aa*  m_cur_cell_ptr;
-    pod_array<cell_aa*> m_sorted_cells;
-    pod_array<sorted_y> m_sorted_y;
-    cell_aa   m_cur_cell;
-    int       m_cur_x;
-    int       m_cur_y;
-    int       m_min_x;
-    int       m_min_y;
-    int       m_max_x;
-    int       m_max_y;
-    bool      m_sorted;
-};
-class scanline_hit_test : public CFX_Object
-{
-public:
-    scanline_hit_test(int x) : m_x(x), m_hit(false) {}
-    void reset_spans() {}
-    void finalize(int) {}
-    void add_cell(int x, int)
-    {
-        if(m_x == x) {
-            m_hit = true;
-        }
-    }
-    void add_span(int x, int len, int)
-    {
-        if(m_x >= x && m_x < x + len) {
-            m_hit = true;
-        }
-    }
-    unsigned num_spans() const
-    {
-        return 1;
-    }
-    bool hit() const
-    {
-        return m_hit;
-    }
-private:
-    int  m_x;
-    bool m_hit;
-};
-enum filling_rule_e {
-    fill_non_zero,
-    fill_even_odd
-};
-class rasterizer_scanline_aa : public CFX_Object
-{
-    enum status {
-        status_initial,
-        status_line_to,
-        status_closed
-    };
-public:
-    enum aa_scale_e {
-        aa_num   = 1 << 8,
-        aa_mask  = aa_num - 1,
-        aa_2num  = aa_num * 2,
-        aa_2mask = aa_2num - 1
-    };
-    rasterizer_scanline_aa() :
-        m_filling_rule(fill_non_zero),
-        m_clipped_start_x(0),
-        m_clipped_start_y(0),
-        m_status(status_initial),
-        m_clipping(false)
-    {
-    }
-    ~rasterizer_scanline_aa() {}
-    void filling_rule(filling_rule_e filling_rule)
-    {
-        m_filling_rule = filling_rule;
-    }
-    int min_x() const
-    {
-        return m_outline.min_x();
-    }
-    int min_y() const
-    {
-        return m_outline.min_y();
-    }
-    int max_x() const
-    {
-        return m_outline.max_x();
-    }
-    int max_y() const
-    {
-        return m_outline.max_y();
-    }
-    void reset()
-    {
-        m_outline.reset();
-        m_status = status_initial;
-    }
-    void clip_box(FX_FLOAT x1, FX_FLOAT y1, FX_FLOAT x2, FX_FLOAT y2)
-    {
-        m_clip_box = rect(poly_coord(x1), poly_coord(y1),
-                          poly_coord(x2), poly_coord(y2));
-        m_clip_box.normalize();
-        m_clipping = true;
-    }
-    void add_vertex(FX_FLOAT x, FX_FLOAT y, unsigned cmd)
-    {
-        if(is_close(cmd)) {
-            close_polygon();
-        } else {
-            if(is_move_to(cmd)) {
-                move_to(poly_coord(x), poly_coord(y));
-            } else {
-                if(is_vertex(cmd)) {
-                    line_to(poly_coord(x), poly_coord(y));
-                }
-            }
-        }
-    }
-    void move_to(int x, int y)
-    {
-        if(m_clipping) {
-            if(m_outline.sorted()) {
-                reset();
-            }
-            if(m_status == status_line_to) {
-                close_polygon();
-            }
-            m_prev_x = m_start_x = x;
-            m_prev_y = m_start_y = y;
-            m_status = status_initial;
-            m_prev_flags = clipping_flags(x, y, m_clip_box);
-            if(m_prev_flags == 0) {
-                move_to_no_clip(x, y);
-            }
-        } else {
-            move_to_no_clip(x, y);
-        }
-    }
-    void line_to(int x, int y)
-    {
-        if(m_clipping) {
-            clip_segment(x, y);
-        } else {
-            line_to_no_clip(x, y);
-        }
-    }
-    void close_polygon()
-    {
-        if (m_status != status_line_to) {
-            return;
-        }
-        if(m_clipping) {
-            clip_segment(m_start_x, m_start_y);
-        }
-        close_polygon_no_clip();
-    }
-    AGG_INLINE unsigned calculate_alpha(int area, bool no_smooth) const
-    {
-        int cover = area >> (poly_base_shift * 2 + 1 - 8);
-        if(cover < 0) {
-            cover = -cover;
-        }
-        if(m_filling_rule == fill_even_odd) {
-            cover &= aa_2mask;
-            if(cover > aa_num) {
-                cover = aa_2num - cover;
-            }
-        }
-        if (no_smooth) {
-            cover = cover > aa_mask / 2 ? aa_mask : 0;
-        }
-        if(cover > aa_mask) {
-            cover = aa_mask;
-        }
-        return cover;
-    }
-    AGG_INLINE void sort()
-    {
-        m_outline.sort_cells();
-    }
-    AGG_INLINE bool rewind_scanlines()
-    {
-        close_polygon();
-        m_outline.sort_cells();
-        if(m_outline.total_cells() == 0) {
-            return false;
-        }
-        m_cur_y = m_outline.min_y();
-        return true;
-    }
-    AGG_INLINE bool navigate_scanline(int y)
-    {
-        close_polygon();
-        m_outline.sort_cells();
-        if(m_outline.total_cells() == 0 ||
-                y < m_outline.min_y() ||
-                y > m_outline.max_y()) {
-            return false;
-        }
-        m_cur_y = y;
-        return true;
-    }
-    template<class Scanline> bool sweep_scanline(Scanline& sl, bool no_smooth)
-    {
-        for(;;) {
-            if(m_cur_y > m_outline.max_y()) {
-                return false;
-            }
-            sl.reset_spans();
-            unsigned num_cells = m_outline.scanline_num_cells(m_cur_y);
-            const cell_aa* const* cells = m_outline.scanline_cells(m_cur_y);
-            int cover = 0;
-            while(num_cells) {
-                const cell_aa* cur_cell = *cells;
-                int x    = cur_cell->x;
-                int area = cur_cell->area;
-                unsigned alpha;
-                cover += cur_cell->cover;
-                while(--num_cells) {
-                    cur_cell = *++cells;
-                    if(cur_cell->x != x) {
-                        break;
-                    }
-                    area  += cur_cell->area;
-                    cover += cur_cell->cover;
-                }
-                if(area) {
-                    alpha = calculate_alpha((cover << (poly_base_shift + 1)) - area, no_smooth);
-                    if(alpha) {
-                        sl.add_cell(x, alpha);
-                    }
-                    x++;
-                }
-                if(num_cells && cur_cell->x > x) {
-                    alpha = calculate_alpha(cover << (poly_base_shift + 1), no_smooth);
-                    if(alpha) {
-                        sl.add_span(x, cur_cell->x - x, alpha);
-                    }
-                }
-            }
-            if(sl.num_spans()) {
-                break;
-            }
-            ++m_cur_y;
-        }
-        sl.finalize(m_cur_y);
-        ++m_cur_y;
-        return true;
-    }
-    template<class VertexSource>
-    void add_path(VertexSource& vs, unsigned path_id = 0)
-    {
-        FX_FLOAT x;
-        FX_FLOAT y;
-        unsigned cmd;
-        vs.rewind(path_id);
-        while(!is_stop(cmd = vs.vertex(&x, &y))) {
-            add_vertex(x, y, cmd);
-        }
-    }
-    template<class VertexSource>
-    void add_path_transformed(VertexSource& vs, const CFX_AffineMatrix* pMatrix, unsigned path_id = 0)
-    {
-        FX_FLOAT x;
-        FX_FLOAT y;
-        unsigned cmd;
-        vs.rewind(path_id);
-        while(!is_stop(cmd = vs.vertex(&x, &y))) {
-            if (pMatrix) {
-                pMatrix->Transform(x, y);
-            }
-            add_vertex(x, y, cmd);
-        }
-    }
-private:
-    rasterizer_scanline_aa(const rasterizer_scanline_aa&);
-    const rasterizer_scanline_aa&
-    operator = (const rasterizer_scanline_aa&);
-    void move_to_no_clip(int x, int y)
-    {
-        if(m_status == status_line_to) {
-            close_polygon_no_clip();
-        }
-        m_outline.move_to(x * 1, y);
-        m_clipped_start_x = x;
-        m_clipped_start_y = y;
-        m_status = status_line_to;
-    }
-    void line_to_no_clip(int x, int y)
-    {
-        if(m_status != status_initial) {
-            m_outline.line_to(x * 1, y);
-            m_status = status_line_to;
-        }
-    }
-    void close_polygon_no_clip()
-    {
-        if(m_status == status_line_to) {
-            m_outline.line_to(m_clipped_start_x * 1, m_clipped_start_y);
-            m_status = status_closed;
-        }
-    }
-    void clip_segment(int x, int y)
-    {
-        unsigned flags = clipping_flags(x, y, m_clip_box);
-        if(m_prev_flags == flags) {
-            if(flags == 0) {
-                if(m_status == status_initial) {
-                    move_to_no_clip(x, y);
-                } else {
-                    line_to_no_clip(x, y);
-                }
-            }
-        } else {
-            int cx[4];
-            int cy[4];
-            unsigned n = clip_liang_barsky(m_prev_x, m_prev_y,
-                                           x, y,
-                                           m_clip_box,
-                                           cx, cy);
-            const int* px = cx;
-            const int* py = cy;
-            while(n--) {
-                if(m_status == status_initial) {
-                    move_to_no_clip(*px++, *py++);
-                } else {
-                    line_to_no_clip(*px++, *py++);
-                }
-            }
-        }
-        m_prev_flags = flags;
-        m_prev_x = x;
-        m_prev_y = y;
-    }
-private:
-    outline_aa     m_outline;
-    filling_rule_e m_filling_rule;
-    int            m_clipped_start_x;
-    int            m_clipped_start_y;
-    int            m_start_x;
-    int            m_start_y;
-    int            m_prev_x;
-    int            m_prev_y;
-    unsigned       m_prev_flags;
-    unsigned       m_status;
-    rect           m_clip_box;
-    bool           m_clipping;
-    int            m_cur_y;
-};
-}
-#endif