diff options
Diffstat (limited to 'agg/inc/agg_scanline_storage_bin.h')
| -rwxr-xr-x | agg/inc/agg_scanline_storage_bin.h | 569 |
1 files changed, 569 insertions, 0 deletions
diff --git a/agg/inc/agg_scanline_storage_bin.h b/agg/inc/agg_scanline_storage_bin.h new file mode 100755 index 000000000000..90fa50e4ee6d --- /dev/null +++ b/agg/inc/agg_scanline_storage_bin.h @@ -0,0 +1,569 @@ +//---------------------------------------------------------------------------- +// 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. +// +//---------------------------------------------------------------------------- +// Contact: mcseem@antigrain.com +// mcseemagg@yahoo.com +// http://www.antigrain.com +//---------------------------------------------------------------------------- + +#ifndef AGG_SCANLINE_STORAGE_BIN_INCLUDED +#define AGG_SCANLINE_STORAGE_BIN_INCLUDED + +#include <string.h> +#include <stdlib.h> +#include <math.h> +#include "agg_array.h" +#include "agg_render_scanlines.h" + + +namespace agg +{ + + //-----------------------------------------------scanline_storage_bin + class scanline_storage_bin + { + public: + //--------------------------------------------------------------- + struct span_data + { + int16 x; + int16 len; + }; + + //--------------------------------------------------------------- + struct scanline_data + { + int y; + unsigned num_spans; + unsigned start_span; + }; + + + //--------------------------------------------------------------- + class embedded_scanline + { + public: + + //----------------------------------------------------------- + class const_iterator + { + public: + const_iterator(const embedded_scanline& sl) : + m_storage(sl.m_storage), + m_span_idx(sl.m_scanline.start_span) + { + m_span = m_storage->span_by_index(m_span_idx); + } + + const span_data& operator*() const { return m_span; } + const span_data* operator->() const { return &m_span; } + + void operator ++ () + { + ++m_span_idx; + m_span = m_storage->span_by_index(m_span_idx); + } + + private: + const scanline_storage_bin* m_storage; + unsigned m_span_idx; + span_data m_span; + }; + + friend class const_iterator; + + + //----------------------------------------------------------- + embedded_scanline(const scanline_storage_bin& storage) : + m_storage(&storage) + { + setup(0); + } + + //----------------------------------------------------------- + void reset(int, int) {} + unsigned num_spans() const { return m_scanline.num_spans; } + int y() const { return m_scanline.y; } + const_iterator begin() const { return const_iterator(*this); } + + //----------------------------------------------------------- + void setup(unsigned scanline_idx) + { + m_scanline_idx = scanline_idx; + m_scanline = m_storage->scanline_by_index(m_scanline_idx); + } + + private: + const scanline_storage_bin* m_storage; + scanline_data m_scanline; + unsigned m_scanline_idx; + }; + + + //--------------------------------------------------------------- + scanline_storage_bin() : + m_spans(256-2), // Block increment size + m_scanlines(), + m_min_x( 0x7FFFFFFF), + m_min_y( 0x7FFFFFFF), + m_max_x(-0x7FFFFFFF), + m_max_y(-0x7FFFFFFF), + m_cur_scanline(0) + { + m_fake_scanline.y = 0; + m_fake_scanline.num_spans = 0; + m_fake_scanline.start_span = 0; + m_fake_span.x = 0; + m_fake_span.len = 0; + } + + // Renderer Interface + //--------------------------------------------------------------- + void prepare(unsigned) + { + m_scanlines.remove_all(); + m_spans.remove_all(); + m_min_x = 0x7FFFFFFF; + m_min_y = 0x7FFFFFFF; + m_max_x = -0x7FFFFFFF; + m_max_y = -0x7FFFFFFF; + m_cur_scanline = 0; + } + + //--------------------------------------------------------------- + template<class Scanline> void render(const Scanline& sl) + { + scanline_data sl_this; + + int y = sl.y(); + if(y < m_min_y) m_min_y = y; + if(y > m_max_y) m_max_y = y; + + sl_this.y = y; + sl_this.num_spans = sl.num_spans(); + sl_this.start_span = m_spans.size(); + typename Scanline::const_iterator span_iterator = sl.begin(); + + unsigned num_spans = sl_this.num_spans; + do + { + span_data sp; + sp.x = span_iterator->x; + sp.len = (int16)abs((int)(span_iterator->len)); + m_spans.add(sp); + int x1 = sp.x; + int x2 = sp.x + sp.len - 1; + if(x1 < m_min_x) m_min_x = x1; + if(x2 > m_max_x) m_max_x = x2; + ++span_iterator; + } + while(--num_spans); + m_scanlines.add(sl_this); + } + + + //--------------------------------------------------------------- + // Iterate scanlines interface + 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; } + + //--------------------------------------------------------------- + bool rewind_scanlines() + { + m_cur_scanline = 0; + return m_scanlines.size() > 0; + } + + + //--------------------------------------------------------------- + template<class Scanline> bool sweep_scanline(Scanline& sl) + { + sl.reset_spans(); + for(;;) + { + if(m_cur_scanline >= m_scanlines.size()) return false; + const scanline_data& sl_this = m_scanlines[m_cur_scanline]; + + unsigned num_spans = sl_this.num_spans; + unsigned span_idx = sl_this.start_span; + do + { + const span_data& sp = m_spans[span_idx++]; + sl.add_span(sp.x, sp.len, cover_full); + } + while(--num_spans); + + ++m_cur_scanline; + if(sl.num_spans()) + { + sl.finalize(sl_this.y); + break; + } + } + return true; + } + + + //--------------------------------------------------------------- + // Specialization for embedded_scanline + bool sweep_scanline(embedded_scanline& sl) + { + do + { + if(m_cur_scanline >= m_scanlines.size()) return false; + sl.setup(m_cur_scanline); + ++m_cur_scanline; + } + while(sl.num_spans() == 0); + return true; + } + + + //--------------------------------------------------------------- + unsigned byte_size() const + { + unsigned i; + unsigned size = sizeof(int16) * 4; // min_x, min_y, max_x, max_y + + for(i = 0; i < m_scanlines.size(); ++i) + { + size += sizeof(int16) * 2 + // Y, num_spans + unsigned(m_scanlines[i].num_spans) * sizeof(int16) * 2; // X, span_len + } + return size; + } + + + //--------------------------------------------------------------- + static void write_int16(int8u* dst, int16 val) + { + dst[0] = ((const int8u*)&val)[0]; + dst[1] = ((const int8u*)&val)[1]; + } + + + //--------------------------------------------------------------- + void serialize(int8u* data) const + { + unsigned i; + + write_int16(data, int16u(min_x())); // min_x + data += sizeof(int16u); + write_int16(data, int16u(min_y())); // min_y + data += sizeof(int16u); + write_int16(data, int16u(max_x())); // max_x + data += sizeof(int16u); + write_int16(data, int16u(max_y())); // max_y + data += sizeof(int16u); + + for(i = 0; i < m_scanlines.size(); ++i) + { + const scanline_data& sl_this = m_scanlines[i]; + + write_int16(data, int16(sl_this.y)); // Y + data += sizeof(int16); + + write_int16(data, int16(sl_this.num_spans)); // num_spans + data += sizeof(int16); + + unsigned num_spans = sl_this.num_spans; + unsigned span_idx = sl_this.start_span; + do + { + const span_data& sp = m_spans[span_idx++]; + + write_int16(data, int16(sp.x)); // X + data += sizeof(int16); + + write_int16(data, int16(sp.len)); // len + data += sizeof(int16); + } + while(--num_spans); + } + } + + + //--------------------------------------------------------------- + const scanline_data& scanline_by_index(unsigned i) const + { + return (i < m_scanlines.size()) ? m_scanlines[i] : m_fake_scanline; + } + + //--------------------------------------------------------------- + const span_data& span_by_index(unsigned i) const + { + return (i < m_spans.size()) ? m_spans[i] : m_fake_span; + } + + + private: + pod_deque<span_data, 10> m_spans; + pod_deque<scanline_data, 8> m_scanlines; + span_data m_fake_span; + scanline_data m_fake_scanline; + int m_min_x; + int m_min_y; + int m_max_x; + int m_max_y; + unsigned m_cur_scanline; + }; + + + + + + + + + + + + + + //---------------------------------------serialized_scanlines_adaptor_bin + class serialized_scanlines_adaptor_bin + { + public: + typedef bool cover_type; + + //-------------------------------------------------------------------- + class embedded_scanline + { + public: + + //---------------------------------------------------------------- + class const_iterator + { + public: + struct span + { + int16 x; + int16 len; + }; + + const_iterator(const embedded_scanline& sl) : + m_ptr(sl.m_ptr), + m_dx(sl.m_dx) + { + m_span.x = read_int16() + m_dx; + m_span.len = read_int16(); + } + + const span& operator*() const { return m_span; } + const span* operator->() const { return &m_span; } + + void operator ++ () + { + m_span.x = read_int16() + m_dx; + m_span.len = read_int16(); + } + + private: + int read_int16() + { + int16 val; + ((int8u*)&val)[0] = *m_ptr++; + ((int8u*)&val)[1] = *m_ptr++; + return val; + } + + const int8u* m_ptr; + span m_span; + int m_dx; + }; + + friend class const_iterator; + + + //---------------------------------------------------------------- + embedded_scanline() : m_ptr(0), m_y(0), m_num_spans(0) {} + + //---------------------------------------------------------------- + void reset(int, int) {} + unsigned num_spans() const { return m_num_spans; } + int y() const { return m_y; } + const_iterator begin() const { return const_iterator(*this); } + + + private: + //---------------------------------------------------------------- + int read_int16() + { + int16 val; + ((int8u*)&val)[0] = *m_ptr++; + ((int8u*)&val)[1] = *m_ptr++; + return val; + } + + public: + //---------------------------------------------------------------- + void init(const int8u* ptr, int dx, int dy) + { + m_ptr = ptr; + m_y = read_int16() + dy; + m_num_spans = unsigned(read_int16()); + m_dx = dx; + } + + private: + const int8u* m_ptr; + int m_y; + unsigned m_num_spans; + int m_dx; + }; + + + + public: + //-------------------------------------------------------------------- + serialized_scanlines_adaptor_bin() : + m_data(0), + m_end(0), + m_ptr(0), + m_dx(0), + m_dy(0), + m_min_x(0x7FFFFFFF), + m_min_y(0x7FFFFFFF), + m_max_x(-0x7FFFFFFF), + m_max_y(-0x7FFFFFFF) + {} + + //-------------------------------------------------------------------- + serialized_scanlines_adaptor_bin(const int8u* data, unsigned size, + double dx, double dy) : + m_data(data), + m_end(data + size), + m_ptr(data), + m_dx(int(floor(dx + 0.5))), + m_dy(int(floor(dy + 0.5))), + m_min_x(0x7FFFFFFF), + m_min_y(0x7FFFFFFF), + m_max_x(-0x7FFFFFFF), + m_max_y(-0x7FFFFFFF) + {} + + //-------------------------------------------------------------------- + void init(const int8u* data, unsigned size, double dx, double dy) + { + m_data = data; + m_end = data + size; + m_ptr = data; + m_dx = int(floor(dx + 0.5)); + m_dy = int(floor(dy + 0.5)); + m_min_x = 0x7FFFFFFF; + m_min_y = 0x7FFFFFFF; + m_max_x = -0x7FFFFFFF; + m_max_y = -0x7FFFFFFF; + } + + private: + //-------------------------------------------------------------------- + int read_int16() + { + int16 val; + ((int8u*)&val)[0] = *m_ptr++; + ((int8u*)&val)[1] = *m_ptr++; + return val; + } + + public: + // Iterate scanlines interface + //-------------------------------------------------------------------- + bool rewind_scanlines() + { + m_ptr = m_data; + if(m_ptr < m_end) + { + m_min_x = read_int16() + m_dx; + m_min_y = read_int16() + m_dy; + m_max_x = read_int16() + m_dx; + m_max_y = read_int16() + m_dy; + return true; + } + return false; + } + + //-------------------------------------------------------------------- + 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; } + + //-------------------------------------------------------------------- + template<class Scanline> bool sweep_scanline(Scanline& sl) + { + sl.reset_spans(); + for(;;) + { + if(m_ptr >= m_end) return false; + + int y = read_int16() + m_dy; + unsigned num_spans = read_int16(); + + do + { + int x = read_int16() + m_dx; + int len = read_int16(); + + if(len < 0) len = -len; + sl.add_span(x, unsigned(len), cover_full); + } + while(--num_spans); + + if(sl.num_spans()) + { + sl.finalize(y); + break; + } + } + return true; + } + + + //-------------------------------------------------------------------- + // Specialization for embedded_scanline + bool sweep_scanline(embedded_scanline& sl) + { + do + { + if(m_ptr >= m_end) return false; + + sl.init(m_ptr, m_dx, m_dy); + + // Jump to the next scanline + //-------------------------- + read_int16(); // Y + int num_spans = read_int16(); // num_spans + m_ptr += num_spans * sizeof(int16) * 2; + } + while(sl.num_spans() == 0); + return true; + } + + private: + const int8u* m_data; + const int8u* m_end; + const int8u* m_ptr; + int m_dx; + int m_dy; + int m_min_x; + int m_min_y; + int m_max_x; + int m_max_y; + }; + + + +} + +#endif + |