diff options
Diffstat (limited to 'agg/inc/agg_glyph_raster_bin.h')
-rwxr-xr-x | agg/inc/agg_glyph_raster_bin.h | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/agg/inc/agg_glyph_raster_bin.h b/agg/inc/agg_glyph_raster_bin.h new file mode 100755 index 000000000000..851d9f94bd72 --- /dev/null +++ b/agg/inc/agg_glyph_raster_bin.h @@ -0,0 +1,155 @@ +//---------------------------------------------------------------------------- +// 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_GLYPH_RASTER_BIN_INCLUDED +#define AGG_GLYPH_RASTER_BIN_INCLUDED + +#include <string.h> +#include "agg_basics.h" + +namespace agg +{ + + //========================================================glyph_raster_bin + template<class ColorT> class glyph_raster_bin + { + public: + typedef ColorT color_type; + + //-------------------------------------------------------------------- + struct glyph_rect + { + int x1,y1,x2,y2; + double dx, dy; + }; + + //-------------------------------------------------------------------- + glyph_raster_bin(const int8u* font) : + m_font(font), + m_big_endian(false) + { + int t = 1; + if(*(char*)&t == 0) m_big_endian = true; + memset(m_span, 0, sizeof(m_span)); + } + + //-------------------------------------------------------------------- + const int8u* font() const { return m_font; } + void font(const int8u* f) { m_font = f; } + + //-------------------------------------------------------------------- + double height() const { return m_font[0]; } + double base_line() const { return m_font[1]; } + + //-------------------------------------------------------------------- + template<class CharT> + double width(const CharT* str) const + { + unsigned start_char = m_font[2]; + unsigned num_chars = m_font[3]; + + unsigned w = 0; + while(*str) + { + unsigned glyph = *str; + const int8u* bits = m_font + 4 + num_chars * 2 + + value(m_font + 4 + (glyph - start_char) * 2); + w += *bits; + ++str; + } + return w; + } + + //-------------------------------------------------------------------- + void prepare(glyph_rect* r, double x, double y, unsigned glyph, bool flip) + { + unsigned start_char = m_font[2]; + unsigned num_chars = m_font[3]; + + m_bits = m_font + 4 + num_chars * 2 + + value(m_font + 4 + (glyph - start_char) * 2); + + m_glyph_width = *m_bits++; + m_glyph_byte_width = (m_glyph_width + 7) >> 3; + + r->x1 = int(x); + r->x2 = r->x1 + m_glyph_width - 1; + if(flip) + { + r->y1 = int(y) - m_font[0] + m_font[1]; + r->y2 = r->y1 + m_font[0] - 1; + } + else + { + r->y1 = int(y) - m_font[1] + 1; + r->y2 = r->y1 + m_font[0] - 1; + } + r->dx = m_glyph_width; + r->dy = 0; + } + + //-------------------------------------------------------------------- + const cover_type* span(unsigned i) + { + i = m_font[0] - i - 1; + const int8u* bits = m_bits + i * m_glyph_byte_width; + unsigned j; + unsigned val = *bits; + unsigned nb = 0; + for(j = 0; j < m_glyph_width; ++j) + { + m_span[j] = (cover_type)((val & 0x80) ? cover_full : cover_none); + val <<= 1; + if(++nb >= 8) + { + val = *++bits; + nb = 0; + } + } + return m_span; + } + + private: + //-------------------------------------------------------------------- + int16u value(const int8u* p) const + { + int16u v; + if(m_big_endian) + { + *(int8u*)&v = p[1]; + *((int8u*)&v + 1) = p[0]; + } + else + { + *(int8u*)&v = p[0]; + *((int8u*)&v + 1) = p[1]; + } + return v; + } + + + //-------------------------------------------------------------------- + const int8u* m_font; + bool m_big_endian; + cover_type m_span[32]; + const int8u* m_bits; + unsigned m_glyph_width; + unsigned m_glyph_byte_width; + }; + + +} + +#endif |