619 lines
20 KiB
C++
619 lines
20 KiB
C++
//----------------------------------------------------------------------------
|
|
// Anti-Grain Geometry - Version 2.4
|
|
// 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
|
|
//----------------------------------------------------------------------------
|
|
//
|
|
// Adaptation for high precision colors 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_PIXFMT_GRAY_INCLUDED
|
|
#define AGG_PIXFMT_GRAY_INCLUDED
|
|
|
|
#include <string.h>
|
|
#include "agg_basics.h"
|
|
#include "agg_color_gray.h"
|
|
#include "agg_rendering_buffer.h"
|
|
|
|
namespace agg
|
|
{
|
|
|
|
//============================================================blender_gray
|
|
template<class ColorT> struct blender_gray
|
|
{
|
|
typedef ColorT color_type;
|
|
typedef typename color_type::value_type value_type;
|
|
typedef typename color_type::calc_type calc_type;
|
|
enum base_scale_e { base_shift = color_type::base_shift };
|
|
|
|
static AGG_INLINE void blend_pix(value_type* p, unsigned cv,
|
|
unsigned alpha, unsigned cover=0)
|
|
{
|
|
*p = (value_type)((((cv - calc_type(*p)) * alpha) + (calc_type(*p) << base_shift)) >> base_shift);
|
|
}
|
|
};
|
|
|
|
|
|
//======================================================blender_gray_pre
|
|
template<class ColorT> struct blender_gray_pre
|
|
{
|
|
typedef ColorT color_type;
|
|
typedef typename color_type::value_type value_type;
|
|
typedef typename color_type::calc_type calc_type;
|
|
enum base_scale_e { base_shift = color_type::base_shift };
|
|
|
|
static AGG_INLINE void blend_pix(value_type* p, unsigned cv,
|
|
unsigned alpha, unsigned cover)
|
|
{
|
|
alpha = color_type::base_mask - alpha;
|
|
cover = (cover + 1) << (base_shift - 8);
|
|
*p = (value_type)((*p * alpha + cv * cover) >> base_shift);
|
|
}
|
|
|
|
static AGG_INLINE void blend_pix(value_type* p, unsigned cv,
|
|
unsigned alpha)
|
|
{
|
|
*p = (value_type)(((*p * (color_type::base_mask - alpha)) >> base_shift) + cv);
|
|
}
|
|
};
|
|
|
|
|
|
|
|
//=====================================================apply_gamma_dir_gray
|
|
template<class ColorT, class GammaLut> class apply_gamma_dir_gray
|
|
{
|
|
public:
|
|
typedef typename ColorT::value_type value_type;
|
|
|
|
apply_gamma_dir_gray(const GammaLut& gamma) : m_gamma(gamma) {}
|
|
|
|
AGG_INLINE void operator () (value_type* p)
|
|
{
|
|
*p = m_gamma.dir(*p);
|
|
}
|
|
|
|
private:
|
|
const GammaLut& m_gamma;
|
|
};
|
|
|
|
|
|
|
|
//=====================================================apply_gamma_inv_gray
|
|
template<class ColorT, class GammaLut> class apply_gamma_inv_gray
|
|
{
|
|
public:
|
|
typedef typename ColorT::value_type value_type;
|
|
|
|
apply_gamma_inv_gray(const GammaLut& gamma) : m_gamma(gamma) {}
|
|
|
|
AGG_INLINE void operator () (value_type* p)
|
|
{
|
|
*p = m_gamma.inv(*p);
|
|
}
|
|
|
|
private:
|
|
const GammaLut& m_gamma;
|
|
};
|
|
|
|
|
|
|
|
//=================================================pixfmt_alpha_blend_gray
|
|
template<class Blender, class RenBuf, unsigned Step=1, unsigned Offset=0>
|
|
class pixfmt_alpha_blend_gray
|
|
{
|
|
public:
|
|
typedef RenBuf rbuf_type;
|
|
typedef typename rbuf_type::row_data row_data;
|
|
typedef Blender blender_type;
|
|
typedef typename blender_type::color_type color_type;
|
|
typedef int order_type; // A fake one
|
|
typedef typename color_type::value_type value_type;
|
|
typedef typename color_type::calc_type calc_type;
|
|
enum base_scale_e
|
|
{
|
|
base_shift = color_type::base_shift,
|
|
base_scale = color_type::base_scale,
|
|
base_mask = color_type::base_mask,
|
|
pix_width = sizeof(value_type),
|
|
pix_step = Step,
|
|
pix_offset = Offset
|
|
};
|
|
|
|
private:
|
|
//--------------------------------------------------------------------
|
|
static AGG_INLINE void copy_or_blend_pix(value_type* p,
|
|
const color_type& c,
|
|
unsigned cover)
|
|
{
|
|
if (c.a)
|
|
{
|
|
calc_type alpha = (calc_type(c.a) * (cover + 1)) >> 8;
|
|
if(alpha == base_mask)
|
|
{
|
|
*p = c.v;
|
|
}
|
|
else
|
|
{
|
|
Blender::blend_pix(p, c.v, alpha, cover);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static AGG_INLINE void copy_or_blend_pix(value_type* p,
|
|
const color_type& c)
|
|
{
|
|
if (c.a)
|
|
{
|
|
if(c.a == base_mask)
|
|
{
|
|
*p = c.v;
|
|
}
|
|
else
|
|
{
|
|
Blender::blend_pix(p, c.v, c.a);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
public:
|
|
//--------------------------------------------------------------------
|
|
pixfmt_alpha_blend_gray(rbuf_type& rb) :
|
|
m_rbuf(&rb)
|
|
{}
|
|
void attach(rbuf_type& rb) { m_rbuf = &rb; }
|
|
//--------------------------------------------------------------------
|
|
|
|
template<class PixFmt>
|
|
bool attach(PixFmt& pixf, int x1, int y1, int x2, int y2)
|
|
{
|
|
rect_i r(x1, y1, x2, y2);
|
|
if(r.clip(rect_i(0, 0, pixf.width()-1, pixf.height()-1)))
|
|
{
|
|
int stride = pixf.stride();
|
|
m_rbuf->attach(pixf.pix_ptr(r.x1, stride < 0 ? r.y2 : r.y1),
|
|
(r.x2 - r.x1) + 1,
|
|
(r.y2 - r.y1) + 1,
|
|
stride);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
AGG_INLINE unsigned width() const { return m_rbuf->width(); }
|
|
AGG_INLINE unsigned height() const { return m_rbuf->height(); }
|
|
AGG_INLINE int stride() const { return m_rbuf->stride(); }
|
|
|
|
//--------------------------------------------------------------------
|
|
int8u* row_ptr(int y) { return m_rbuf->row_ptr(y); }
|
|
const int8u* row_ptr(int y) const { return m_rbuf->row_ptr(y); }
|
|
row_data row(int y) const { return m_rbuf->row(y); }
|
|
|
|
const int8u* pix_ptr(int x, int y) const
|
|
{
|
|
return m_rbuf->row_ptr(y) + x * Step + Offset;
|
|
}
|
|
|
|
int8u* pix_ptr(int x, int y)
|
|
{
|
|
return m_rbuf->row_ptr(y) + x * Step + Offset;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
AGG_INLINE static void make_pix(int8u* p, const color_type& c)
|
|
{
|
|
*(value_type*)p = c.v;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
AGG_INLINE color_type pixel(int x, int y) const
|
|
{
|
|
value_type* p = (value_type*)m_rbuf->row_ptr(y) + x * Step + Offset;
|
|
return color_type(*p);
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
AGG_INLINE void copy_pixel(int x, int y, const color_type& c)
|
|
{
|
|
*((value_type*)m_rbuf->row_ptr(x, y, 1) + x * Step + Offset) = c.v;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
AGG_INLINE void blend_pixel(int x, int y, const color_type& c, int8u cover)
|
|
{
|
|
copy_or_blend_pix((value_type*)
|
|
m_rbuf->row_ptr(x, y, 1) + x * Step + Offset,
|
|
c,
|
|
cover);
|
|
}
|
|
|
|
|
|
//--------------------------------------------------------------------
|
|
AGG_INLINE void copy_hline(int x, int y,
|
|
unsigned len,
|
|
const color_type& c)
|
|
{
|
|
value_type* p = (value_type*)
|
|
m_rbuf->row_ptr(x, y, len) + x * Step + Offset;
|
|
|
|
do
|
|
{
|
|
*p = c.v;
|
|
p += Step;
|
|
}
|
|
while(--len);
|
|
}
|
|
|
|
|
|
//--------------------------------------------------------------------
|
|
AGG_INLINE void copy_vline(int x, int y,
|
|
unsigned len,
|
|
const color_type& c)
|
|
{
|
|
do
|
|
{
|
|
value_type* p = (value_type*)
|
|
m_rbuf->row_ptr(x, y++, 1) + x * Step + Offset;
|
|
|
|
*p = c.v;
|
|
}
|
|
while(--len);
|
|
}
|
|
|
|
|
|
//--------------------------------------------------------------------
|
|
void blend_hline(int x, int y,
|
|
unsigned len,
|
|
const color_type& c,
|
|
int8u cover)
|
|
{
|
|
if (c.a)
|
|
{
|
|
value_type* p = (value_type*)
|
|
m_rbuf->row_ptr(x, y, len) + x * Step + Offset;
|
|
|
|
calc_type alpha = (calc_type(c.a) * (cover + 1)) >> 8;
|
|
if(alpha == base_mask)
|
|
{
|
|
do
|
|
{
|
|
*p = c.v;
|
|
p += Step;
|
|
}
|
|
while(--len);
|
|
}
|
|
else
|
|
{
|
|
do
|
|
{
|
|
Blender::blend_pix(p, c.v, alpha, cover);
|
|
p += Step;
|
|
}
|
|
while(--len);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
//--------------------------------------------------------------------
|
|
void blend_vline(int x, int y,
|
|
unsigned len,
|
|
const color_type& c,
|
|
int8u cover)
|
|
{
|
|
if (c.a)
|
|
{
|
|
value_type* p;
|
|
calc_type alpha = (calc_type(c.a) * (cover + 1)) >> 8;
|
|
if(alpha == base_mask)
|
|
{
|
|
do
|
|
{
|
|
p = (value_type*)
|
|
m_rbuf->row_ptr(x, y++, 1) + x * Step + Offset;
|
|
|
|
*p = c.v;
|
|
}
|
|
while(--len);
|
|
}
|
|
else
|
|
{
|
|
do
|
|
{
|
|
p = (value_type*)
|
|
m_rbuf->row_ptr(x, y++, 1) + x * Step + Offset;
|
|
|
|
Blender::blend_pix(p, c.v, alpha, cover);
|
|
}
|
|
while(--len);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
//--------------------------------------------------------------------
|
|
void blend_solid_hspan(int x, int y,
|
|
unsigned len,
|
|
const color_type& c,
|
|
const int8u* covers)
|
|
{
|
|
if (c.a)
|
|
{
|
|
value_type* p = (value_type*)
|
|
m_rbuf->row_ptr(x, y, len) + x * Step + Offset;
|
|
|
|
do
|
|
{
|
|
calc_type alpha = (calc_type(c.a) * (calc_type(*covers) + 1)) >> 8;
|
|
if(alpha == base_mask)
|
|
{
|
|
*p = c.v;
|
|
}
|
|
else
|
|
{
|
|
Blender::blend_pix(p, c.v, alpha, *covers);
|
|
}
|
|
p += Step;
|
|
++covers;
|
|
}
|
|
while(--len);
|
|
}
|
|
}
|
|
|
|
|
|
//--------------------------------------------------------------------
|
|
void blend_solid_vspan(int x, int y,
|
|
unsigned len,
|
|
const color_type& c,
|
|
const int8u* covers)
|
|
{
|
|
if (c.a)
|
|
{
|
|
do
|
|
{
|
|
calc_type alpha = (calc_type(c.a) * (calc_type(*covers) + 1)) >> 8;
|
|
|
|
value_type* p = (value_type*)
|
|
m_rbuf->row_ptr(x, y++, 1) + x * Step + Offset;
|
|
|
|
if(alpha == base_mask)
|
|
{
|
|
*p = c.v;
|
|
}
|
|
else
|
|
{
|
|
Blender::blend_pix(p, c.v, alpha, *covers);
|
|
}
|
|
++covers;
|
|
}
|
|
while(--len);
|
|
}
|
|
}
|
|
|
|
|
|
//--------------------------------------------------------------------
|
|
void copy_color_hspan(int x, int y,
|
|
unsigned len,
|
|
const color_type* colors)
|
|
{
|
|
value_type* p = (value_type*)
|
|
m_rbuf->row_ptr(x, y, len) + x * Step + Offset;
|
|
|
|
do
|
|
{
|
|
*p = colors->v;
|
|
p += Step;
|
|
++colors;
|
|
}
|
|
while(--len);
|
|
}
|
|
|
|
|
|
//--------------------------------------------------------------------
|
|
void copy_color_vspan(int x, int y,
|
|
unsigned len,
|
|
const color_type* colors)
|
|
{
|
|
do
|
|
{
|
|
value_type* p = (value_type*)
|
|
m_rbuf->row_ptr(x, y++, 1) + x * Step + Offset;
|
|
*p = colors->v;
|
|
++colors;
|
|
}
|
|
while(--len);
|
|
}
|
|
|
|
|
|
//--------------------------------------------------------------------
|
|
void blend_color_hspan(int x, int y,
|
|
unsigned len,
|
|
const color_type* colors,
|
|
const int8u* covers,
|
|
int8u cover)
|
|
{
|
|
value_type* p = (value_type*)
|
|
m_rbuf->row_ptr(x, y, len) + x * Step + Offset;
|
|
|
|
if(covers)
|
|
{
|
|
do
|
|
{
|
|
copy_or_blend_pix(p, *colors++, *covers++);
|
|
p += Step;
|
|
}
|
|
while(--len);
|
|
}
|
|
else
|
|
{
|
|
if(cover == 255)
|
|
{
|
|
do
|
|
{
|
|
if(colors->a == base_mask)
|
|
{
|
|
*p = colors->v;
|
|
}
|
|
else
|
|
{
|
|
copy_or_blend_pix(p, *colors);
|
|
}
|
|
p += Step;
|
|
++colors;
|
|
}
|
|
while(--len);
|
|
}
|
|
else
|
|
{
|
|
do
|
|
{
|
|
copy_or_blend_pix(p, *colors++, cover);
|
|
p += Step;
|
|
}
|
|
while(--len);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
//--------------------------------------------------------------------
|
|
void blend_color_vspan(int x, int y,
|
|
unsigned len,
|
|
const color_type* colors,
|
|
const int8u* covers,
|
|
int8u cover)
|
|
{
|
|
value_type* p;
|
|
if(covers)
|
|
{
|
|
do
|
|
{
|
|
p = (value_type*)
|
|
m_rbuf->row_ptr(x, y++, 1) + x * Step + Offset;
|
|
|
|
copy_or_blend_pix(p, *colors++, *covers++);
|
|
}
|
|
while(--len);
|
|
}
|
|
else
|
|
{
|
|
if(cover == 255)
|
|
{
|
|
do
|
|
{
|
|
p = (value_type*)
|
|
m_rbuf->row_ptr(x, y++, 1) + x * Step + Offset;
|
|
|
|
if(colors->a == base_mask)
|
|
{
|
|
*p = colors->v;
|
|
}
|
|
else
|
|
{
|
|
copy_or_blend_pix(p, *colors);
|
|
}
|
|
++colors;
|
|
}
|
|
while(--len);
|
|
}
|
|
else
|
|
{
|
|
do
|
|
{
|
|
p = (value_type*)
|
|
m_rbuf->row_ptr(x, y++, 1) + x * Step + Offset;
|
|
|
|
copy_or_blend_pix(p, *colors++, cover);
|
|
}
|
|
while(--len);
|
|
}
|
|
}
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
template<class Function> void for_each_pixel(Function f)
|
|
{
|
|
unsigned y;
|
|
for(y = 0; y < height(); ++y)
|
|
{
|
|
row_data r = m_rbuf->row(y);
|
|
if(r.ptr)
|
|
{
|
|
unsigned len = r.x2 - r.x1 + 1;
|
|
|
|
value_type* p = (value_type*)
|
|
m_rbuf->row_ptr(r.x1, y, len) + r.x1 * Step + Offset;
|
|
|
|
do
|
|
{
|
|
f(p);
|
|
p += Step;
|
|
}
|
|
while(--len);
|
|
}
|
|
}
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
template<class GammaLut> void apply_gamma_dir(const GammaLut& g)
|
|
{
|
|
for_each_pixel(apply_gamma_dir_gray<color_type, GammaLut>(g));
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
template<class GammaLut> void apply_gamma_inv(const GammaLut& g)
|
|
{
|
|
for_each_pixel(apply_gamma_inv_gray<color_type, GammaLut>(g));
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
template<class RenBuf2>
|
|
void copy_from(const RenBuf2& from,
|
|
int xdst, int ydst,
|
|
int xsrc, int ysrc,
|
|
unsigned len)
|
|
{
|
|
const int8u* p = from.row_ptr(ysrc);
|
|
if(p)
|
|
{
|
|
memmove(m_rbuf->row_ptr(xdst, ydst, len) + xdst * pix_width,
|
|
p + xsrc * pix_width,
|
|
len * pix_width);
|
|
}
|
|
}
|
|
|
|
private:
|
|
rbuf_type* m_rbuf;
|
|
};
|
|
|
|
typedef blender_gray<gray8> blender_gray8;
|
|
typedef blender_gray_pre<gray8> blender_gray8_pre;
|
|
typedef blender_gray<gray16> blender_gray16;
|
|
typedef blender_gray_pre<gray16> blender_gray16_pre;
|
|
|
|
typedef pixfmt_alpha_blend_gray<blender_gray8, rendering_buffer> pixfmt_gray8; //----pixfmt_gray8
|
|
typedef pixfmt_alpha_blend_gray<blender_gray8_pre, rendering_buffer> pixfmt_gray8_pre; //----pixfmt_gray8_pre
|
|
typedef pixfmt_alpha_blend_gray<blender_gray16, rendering_buffer> pixfmt_gray16; //----pixfmt_gray16
|
|
typedef pixfmt_alpha_blend_gray<blender_gray16_pre, rendering_buffer> pixfmt_gray16_pre; //----pixfmt_gray16_pre
|
|
}
|
|
|
|
#endif
|
|
|