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Diffstat (limited to 'agg/inc/agg_alpha_mask_u8.h')
-rwxr-xr-xagg/inc/agg_alpha_mask_u8.h499
1 files changed, 499 insertions, 0 deletions
diff --git a/agg/inc/agg_alpha_mask_u8.h b/agg/inc/agg_alpha_mask_u8.h
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index 000000000000..b7e5c926092f
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+++ b/agg/inc/agg_alpha_mask_u8.h
@@ -0,0 +1,499 @@
+//----------------------------------------------------------------------------
+// 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
+//----------------------------------------------------------------------------
+//
+// scanline_u8 class
+//
+//----------------------------------------------------------------------------
+#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_shift = 8,
+ cover_none = 0,
+ cover_full = 255
+ };
+
+ alpha_mask_u8() : m_rbuf(0) {}
+ 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(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)((val *
+ m_mask_function.calculate(
+ m_rbuf->row(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(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(y) + x * Step + Offset;
+ do
+ {
+ *covers = (cover_type)(((*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(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(y) + x * Step + Offset;
+ do
+ {
+ *covers = (cover_type)(((*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_shift = 8,
+ cover_none = 0,
+ cover_full = 255
+ };
+
+ amask_no_clip_u8() : m_rbuf(0) {}
+ 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(y) + x * Step + Offset);
+ }
+
+
+ //--------------------------------------------------------------------
+ cover_type combine_pixel(int x, int y, cover_type val) const
+ {
+ return (cover_type)((val *
+ m_mask_function.calculate(
+ m_rbuf->row(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(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(y) + x * Step + Offset;
+ do
+ {
+ *dst = (cover_type)(((*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(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(y) + x * Step + Offset;
+ do
+ {
+ *dst = (cover_type)(((*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