//---------------------------------------------------------------------------- // Anti-Grain Geometry (AGG) - Version 2.5 // A high quality rendering engine for C++ // Copyright (C) 2002-2006 Maxim Shemanarev // Contact: mcseem@antigrain.com // mcseemagg@yahoo.com // http://antigrain.com // // AGG is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License // as published by the Free Software Foundation; either version 2 // of the License, or (at your option) any later version. // // AGG is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with AGG; if not, write to the Free Software // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, // MA 02110-1301, USA. //---------------------------------------------------------------------------- #ifndef AGG_ALPHA_MASK_U8_INCLUDED #define AGG_ALPHA_MASK_U8_INCLUDED #include <string.h> #include "agg_basics.h" #include "agg_rendering_buffer.h" namespace agg { //===================================================one_component_mask_u8 struct one_component_mask_u8 { static unsigned calculate(const int8u* p) { return *p; } }; //=====================================================rgb_to_gray_mask_u8 template<unsigned R, unsigned G, unsigned B> struct rgb_to_gray_mask_u8 { static unsigned calculate(const int8u* p) { return (p[R]*77 + p[G]*150 + p[B]*29) >> 8; } }; //==========================================================alpha_mask_u8 template<unsigned Step=1, unsigned Offset=0, class MaskF=one_component_mask_u8> class alpha_mask_u8 { public: typedef int8u cover_type; typedef alpha_mask_u8<Step, Offset, MaskF> self_type; enum cover_scale_e { cover_shift = 8, cover_none = 0, cover_full = 255 }; alpha_mask_u8() : m_rbuf(0) {} explicit alpha_mask_u8(rendering_buffer& rbuf) : m_rbuf(&rbuf) {} void attach(rendering_buffer& rbuf) { m_rbuf = &rbuf; } MaskF& mask_function() { return m_mask_function; } const MaskF& mask_function() const { return m_mask_function; } //-------------------------------------------------------------------- cover_type pixel(int x, int y) const { if(x >= 0 && y >= 0 && x < (int)m_rbuf->width() && y < (int)m_rbuf->height()) { return (cover_type)m_mask_function.calculate( m_rbuf->row_ptr(y) + x * Step + Offset); } return 0; } //-------------------------------------------------------------------- cover_type combine_pixel(int x, int y, cover_type val) const { if(x >= 0 && y >= 0 && x < (int)m_rbuf->width() && y < (int)m_rbuf->height()) { return (cover_type)((cover_full + val * m_mask_function.calculate( m_rbuf->row_ptr(y) + x * Step + Offset)) >> cover_shift); } return 0; } //-------------------------------------------------------------------- void fill_hspan(int x, int y, cover_type* dst, int num_pix) const { int xmax = m_rbuf->width() - 1; int ymax = m_rbuf->height() - 1; int count = num_pix; cover_type* covers = dst; if(y < 0 || y > ymax) { memset(dst, 0, num_pix * sizeof(cover_type)); return; } if(x < 0) { count += x; if(count <= 0) { memset(dst, 0, num_pix * sizeof(cover_type)); return; } memset(covers, 0, -x * sizeof(cover_type)); covers -= x; x = 0; } if(x + count > xmax) { int rest = x + count - xmax - 1; count -= rest; if(count <= 0) { memset(dst, 0, num_pix * sizeof(cover_type)); return; } memset(covers + count, 0, rest * sizeof(cover_type)); } const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset; do { *covers++ = (cover_type)m_mask_function.calculate(mask); mask += Step; } while(--count); } //-------------------------------------------------------------------- void combine_hspan(int x, int y, cover_type* dst, int num_pix) const { int xmax = m_rbuf->width() - 1; int ymax = m_rbuf->height() - 1; int count = num_pix; cover_type* covers = dst; if(y < 0 || y > ymax) { memset(dst, 0, num_pix * sizeof(cover_type)); return; } if(x < 0) { count += x; if(count <= 0) { memset(dst, 0, num_pix * sizeof(cover_type)); return; } memset(covers, 0, -x * sizeof(cover_type)); covers -= x; x = 0; } if(x + count > xmax) { int rest = x + count - xmax - 1; count -= rest; if(count <= 0) { memset(dst, 0, num_pix * sizeof(cover_type)); return; } memset(covers + count, 0, rest * sizeof(cover_type)); } const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset; do { *covers = (cover_type)((cover_full + (*covers) * m_mask_function.calculate(mask)) >> cover_shift); ++covers; mask += Step; } while(--count); } //-------------------------------------------------------------------- void fill_vspan(int x, int y, cover_type* dst, int num_pix) const { int xmax = m_rbuf->width() - 1; int ymax = m_rbuf->height() - 1; int count = num_pix; cover_type* covers = dst; if(x < 0 || x > xmax) { memset(dst, 0, num_pix * sizeof(cover_type)); return; } if(y < 0) { count += y; if(count <= 0) { memset(dst, 0, num_pix * sizeof(cover_type)); return; } memset(covers, 0, -y * sizeof(cover_type)); covers -= y; y = 0; } if(y + count > ymax) { int rest = y + count - ymax - 1; count -= rest; if(count <= 0) { memset(dst, 0, num_pix * sizeof(cover_type)); return; } memset(covers + count, 0, rest * sizeof(cover_type)); } const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset; do { *covers++ = (cover_type)m_mask_function.calculate(mask); mask += m_rbuf->stride(); } while(--count); } //-------------------------------------------------------------------- void combine_vspan(int x, int y, cover_type* dst, int num_pix) const { int xmax = m_rbuf->width() - 1; int ymax = m_rbuf->height() - 1; int count = num_pix; cover_type* covers = dst; if(x < 0 || x > xmax) { memset(dst, 0, num_pix * sizeof(cover_type)); return; } if(y < 0) { count += y; if(count <= 0) { memset(dst, 0, num_pix * sizeof(cover_type)); return; } memset(covers, 0, -y * sizeof(cover_type)); covers -= y; y = 0; } if(y + count > ymax) { int rest = y + count - ymax - 1; count -= rest; if(count <= 0) { memset(dst, 0, num_pix * sizeof(cover_type)); return; } memset(covers + count, 0, rest * sizeof(cover_type)); } const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset; do { *covers = (cover_type)((cover_full + (*covers) * m_mask_function.calculate(mask)) >> cover_shift); ++covers; mask += m_rbuf->stride(); } while(--count); } private: alpha_mask_u8(const self_type&); const self_type& operator = (const self_type&); rendering_buffer* m_rbuf; MaskF m_mask_function; }; typedef alpha_mask_u8<1, 0> alpha_mask_gray8; //----alpha_mask_gray8 typedef alpha_mask_u8<3, 0> alpha_mask_rgb24r; //----alpha_mask_rgb24r typedef alpha_mask_u8<3, 1> alpha_mask_rgb24g; //----alpha_mask_rgb24g typedef alpha_mask_u8<3, 2> alpha_mask_rgb24b; //----alpha_mask_rgb24b typedef alpha_mask_u8<3, 2> alpha_mask_bgr24r; //----alpha_mask_bgr24r typedef alpha_mask_u8<3, 1> alpha_mask_bgr24g; //----alpha_mask_bgr24g typedef alpha_mask_u8<3, 0> alpha_mask_bgr24b; //----alpha_mask_bgr24b typedef alpha_mask_u8<4, 0> alpha_mask_rgba32r; //----alpha_mask_rgba32r typedef alpha_mask_u8<4, 1> alpha_mask_rgba32g; //----alpha_mask_rgba32g typedef alpha_mask_u8<4, 2> alpha_mask_rgba32b; //----alpha_mask_rgba32b typedef alpha_mask_u8<4, 3> alpha_mask_rgba32a; //----alpha_mask_rgba32a typedef alpha_mask_u8<4, 1> alpha_mask_argb32r; //----alpha_mask_argb32r typedef alpha_mask_u8<4, 2> alpha_mask_argb32g; //----alpha_mask_argb32g typedef alpha_mask_u8<4, 3> alpha_mask_argb32b; //----alpha_mask_argb32b typedef alpha_mask_u8<4, 0> alpha_mask_argb32a; //----alpha_mask_argb32a typedef alpha_mask_u8<4, 2> alpha_mask_bgra32r; //----alpha_mask_bgra32r typedef alpha_mask_u8<4, 1> alpha_mask_bgra32g; //----alpha_mask_bgra32g typedef alpha_mask_u8<4, 0> alpha_mask_bgra32b; //----alpha_mask_bgra32b typedef alpha_mask_u8<4, 3> alpha_mask_bgra32a; //----alpha_mask_bgra32a typedef alpha_mask_u8<4, 3> alpha_mask_abgr32r; //----alpha_mask_abgr32r typedef alpha_mask_u8<4, 2> alpha_mask_abgr32g; //----alpha_mask_abgr32g typedef alpha_mask_u8<4, 1> alpha_mask_abgr32b; //----alpha_mask_abgr32b typedef alpha_mask_u8<4, 0> alpha_mask_abgr32a; //----alpha_mask_abgr32a typedef alpha_mask_u8<3, 0, rgb_to_gray_mask_u8<0, 1, 2> > alpha_mask_rgb24gray; //----alpha_mask_rgb24gray typedef alpha_mask_u8<3, 0, rgb_to_gray_mask_u8<2, 1, 0> > alpha_mask_bgr24gray; //----alpha_mask_bgr24gray typedef alpha_mask_u8<4, 0, rgb_to_gray_mask_u8<0, 1, 2> > alpha_mask_rgba32gray; //----alpha_mask_rgba32gray typedef alpha_mask_u8<4, 1, rgb_to_gray_mask_u8<0, 1, 2> > alpha_mask_argb32gray; //----alpha_mask_argb32gray typedef alpha_mask_u8<4, 0, rgb_to_gray_mask_u8<2, 1, 0> > alpha_mask_bgra32gray; //----alpha_mask_bgra32gray typedef alpha_mask_u8<4, 1, rgb_to_gray_mask_u8<2, 1, 0> > alpha_mask_abgr32gray; //----alpha_mask_abgr32gray //==========================================================amask_no_clip_u8 template<unsigned Step=1, unsigned Offset=0, class MaskF=one_component_mask_u8> class amask_no_clip_u8 { public: typedef int8u cover_type; typedef amask_no_clip_u8<Step, Offset, MaskF> self_type; enum cover_scale_e { cover_shift = 8, cover_none = 0, cover_full = 255 }; amask_no_clip_u8() : m_rbuf(0) {} explicit amask_no_clip_u8(rendering_buffer& rbuf) : m_rbuf(&rbuf) {} void attach(rendering_buffer& rbuf) { m_rbuf = &rbuf; } MaskF& mask_function() { return m_mask_function; } const MaskF& mask_function() const { return m_mask_function; } //-------------------------------------------------------------------- cover_type pixel(int x, int y) const { return (cover_type)m_mask_function.calculate( m_rbuf->row_ptr(y) + x * Step + Offset); } //-------------------------------------------------------------------- cover_type combine_pixel(int x, int y, cover_type val) const { return (cover_type)((cover_full + val * m_mask_function.calculate( m_rbuf->row_ptr(y) + x * Step + Offset)) >> cover_shift); } //-------------------------------------------------------------------- void fill_hspan(int x, int y, cover_type* dst, int num_pix) const { const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset; do { *dst++ = (cover_type)m_mask_function.calculate(mask); mask += Step; } while(--num_pix); } //-------------------------------------------------------------------- void combine_hspan(int x, int y, cover_type* dst, int num_pix) const { const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset; do { *dst = (cover_type)((cover_full + (*dst) * m_mask_function.calculate(mask)) >> cover_shift); ++dst; mask += Step; } while(--num_pix); } //-------------------------------------------------------------------- void fill_vspan(int x, int y, cover_type* dst, int num_pix) const { const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset; do { *dst++ = (cover_type)m_mask_function.calculate(mask); mask += m_rbuf->stride(); } while(--num_pix); } //-------------------------------------------------------------------- void combine_vspan(int x, int y, cover_type* dst, int num_pix) const { const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset; do { *dst = (cover_type)((cover_full + (*dst) * m_mask_function.calculate(mask)) >> cover_shift); ++dst; mask += m_rbuf->stride(); } while(--num_pix); } private: amask_no_clip_u8(const self_type&); const self_type& operator = (const self_type&); rendering_buffer* m_rbuf; MaskF m_mask_function; }; typedef amask_no_clip_u8<1, 0> amask_no_clip_gray8; //----amask_no_clip_gray8 typedef amask_no_clip_u8<3, 0> amask_no_clip_rgb24r; //----amask_no_clip_rgb24r typedef amask_no_clip_u8<3, 1> amask_no_clip_rgb24g; //----amask_no_clip_rgb24g typedef amask_no_clip_u8<3, 2> amask_no_clip_rgb24b; //----amask_no_clip_rgb24b typedef amask_no_clip_u8<3, 2> amask_no_clip_bgr24r; //----amask_no_clip_bgr24r typedef amask_no_clip_u8<3, 1> amask_no_clip_bgr24g; //----amask_no_clip_bgr24g typedef amask_no_clip_u8<3, 0> amask_no_clip_bgr24b; //----amask_no_clip_bgr24b typedef amask_no_clip_u8<4, 0> amask_no_clip_rgba32r; //----amask_no_clip_rgba32r typedef amask_no_clip_u8<4, 1> amask_no_clip_rgba32g; //----amask_no_clip_rgba32g typedef amask_no_clip_u8<4, 2> amask_no_clip_rgba32b; //----amask_no_clip_rgba32b typedef amask_no_clip_u8<4, 3> amask_no_clip_rgba32a; //----amask_no_clip_rgba32a typedef amask_no_clip_u8<4, 1> amask_no_clip_argb32r; //----amask_no_clip_argb32r typedef amask_no_clip_u8<4, 2> amask_no_clip_argb32g; //----amask_no_clip_argb32g typedef amask_no_clip_u8<4, 3> amask_no_clip_argb32b; //----amask_no_clip_argb32b typedef amask_no_clip_u8<4, 0> amask_no_clip_argb32a; //----amask_no_clip_argb32a typedef amask_no_clip_u8<4, 2> amask_no_clip_bgra32r; //----amask_no_clip_bgra32r typedef amask_no_clip_u8<4, 1> amask_no_clip_bgra32g; //----amask_no_clip_bgra32g typedef amask_no_clip_u8<4, 0> amask_no_clip_bgra32b; //----amask_no_clip_bgra32b typedef amask_no_clip_u8<4, 3> amask_no_clip_bgra32a; //----amask_no_clip_bgra32a typedef amask_no_clip_u8<4, 3> amask_no_clip_abgr32r; //----amask_no_clip_abgr32r typedef amask_no_clip_u8<4, 2> amask_no_clip_abgr32g; //----amask_no_clip_abgr32g typedef amask_no_clip_u8<4, 1> amask_no_clip_abgr32b; //----amask_no_clip_abgr32b typedef amask_no_clip_u8<4, 0> amask_no_clip_abgr32a; //----amask_no_clip_abgr32a typedef amask_no_clip_u8<3, 0, rgb_to_gray_mask_u8<0, 1, 2> > amask_no_clip_rgb24gray; //----amask_no_clip_rgb24gray typedef amask_no_clip_u8<3, 0, rgb_to_gray_mask_u8<2, 1, 0> > amask_no_clip_bgr24gray; //----amask_no_clip_bgr24gray typedef amask_no_clip_u8<4, 0, rgb_to_gray_mask_u8<0, 1, 2> > amask_no_clip_rgba32gray; //----amask_no_clip_rgba32gray typedef amask_no_clip_u8<4, 1, rgb_to_gray_mask_u8<0, 1, 2> > amask_no_clip_argb32gray; //----amask_no_clip_argb32gray typedef amask_no_clip_u8<4, 0, rgb_to_gray_mask_u8<2, 1, 0> > amask_no_clip_bgra32gray; //----amask_no_clip_bgra32gray typedef amask_no_clip_u8<4, 1, rgb_to_gray_mask_u8<2, 1, 0> > amask_no_clip_abgr32gray; //----amask_no_clip_abgr32gray } #endif |