You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
738 lines
24 KiB
738 lines
24 KiB
//---------------------------------------------------------------------------- |
|
// 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 <cstring> |
|
#include "agg_pixfmt_base.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; |
|
typedef typename color_type::long_type long_type; |
|
|
|
// Blend pixels using the non-premultiplied form of Alvy-Ray Smith's |
|
// compositing function. Since the render buffer is opaque we skip the |
|
// initial premultiply and final demultiply. |
|
|
|
static AGG_INLINE void blend_pix(value_type* p, |
|
value_type cv, value_type alpha, cover_type cover) |
|
{ |
|
blend_pix(p, cv, color_type::mult_cover(alpha, cover)); |
|
} |
|
|
|
static AGG_INLINE void blend_pix(value_type* p, |
|
value_type cv, value_type alpha) |
|
{ |
|
*p = color_type::lerp(*p, cv, alpha); |
|
} |
|
}; |
|
|
|
|
|
//======================================================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; |
|
typedef typename color_type::long_type long_type; |
|
|
|
// Blend pixels using the premultiplied form of Alvy-Ray Smith's |
|
// compositing function. |
|
|
|
static AGG_INLINE void blend_pix(value_type* p, |
|
value_type cv, value_type alpha, cover_type cover) |
|
{ |
|
blend_pix(p, color_type::mult_cover(cv, cover), color_type::mult_cover(alpha, cover)); |
|
} |
|
|
|
static AGG_INLINE void blend_pix(value_type* p, |
|
value_type cv, value_type alpha) |
|
{ |
|
*p = color_type::prelerp(*p, cv, alpha); |
|
} |
|
}; |
|
|
|
|
|
|
|
//=====================================================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 pixfmt_gray_tag pixfmt_category; |
|
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 |
|
{ |
|
num_components = 1, |
|
pix_width = sizeof(value_type) * Step, |
|
pix_step = Step, |
|
pix_offset = Offset, |
|
}; |
|
struct pixel_type |
|
{ |
|
value_type c[num_components]; |
|
|
|
void set(value_type v) |
|
{ |
|
c[0] = v; |
|
} |
|
|
|
void set(const color_type& color) |
|
{ |
|
set(color.v); |
|
} |
|
|
|
void get(value_type& v) const |
|
{ |
|
v = c[0]; |
|
} |
|
|
|
color_type get() const |
|
{ |
|
return color_type(c[0]); |
|
} |
|
|
|
pixel_type* next() |
|
{ |
|
return (pixel_type*)(c + pix_step); |
|
} |
|
|
|
const pixel_type* next() const |
|
{ |
|
return (const pixel_type*)(c + pix_step); |
|
} |
|
|
|
pixel_type* advance(int n) |
|
{ |
|
return (pixel_type*)(c + n * pix_step); |
|
} |
|
|
|
const pixel_type* advance(int n) const |
|
{ |
|
return (const pixel_type*)(c + n * pix_step); |
|
} |
|
}; |
|
|
|
private: |
|
//-------------------------------------------------------------------- |
|
AGG_INLINE void blend_pix(pixel_type* p, |
|
value_type v, value_type a, |
|
unsigned cover) |
|
{ |
|
blender_type::blend_pix(p->c, v, a, cover); |
|
} |
|
|
|
//-------------------------------------------------------------------- |
|
AGG_INLINE void blend_pix(pixel_type* p, value_type v, value_type a) |
|
{ |
|
blender_type::blend_pix(p->c, v, a); |
|
} |
|
|
|
//-------------------------------------------------------------------- |
|
AGG_INLINE void blend_pix(pixel_type* p, const color_type& c, unsigned cover) |
|
{ |
|
blender_type::blend_pix(p->c, c.v, c.a, cover); |
|
} |
|
|
|
//-------------------------------------------------------------------- |
|
AGG_INLINE void blend_pix(pixel_type* p, const color_type& c) |
|
{ |
|
blender_type::blend_pix(p->c, c.v, c.a); |
|
} |
|
|
|
//-------------------------------------------------------------------- |
|
AGG_INLINE void copy_or_blend_pix(pixel_type* p, const color_type& c, unsigned cover) |
|
{ |
|
if (!c.is_transparent()) |
|
{ |
|
if (c.is_opaque() && cover == cover_mask) |
|
{ |
|
p->set(c); |
|
} |
|
else |
|
{ |
|
blend_pix(p, c, cover); |
|
} |
|
} |
|
} |
|
|
|
//-------------------------------------------------------------------- |
|
AGG_INLINE void copy_or_blend_pix(pixel_type* p, const color_type& c) |
|
{ |
|
if (!c.is_transparent()) |
|
{ |
|
if (c.is_opaque()) |
|
{ |
|
p->set(c); |
|
} |
|
else |
|
{ |
|
blend_pix(p, c); |
|
} |
|
} |
|
} |
|
|
|
public: |
|
//-------------------------------------------------------------------- |
|
explicit 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); } |
|
|
|
//-------------------------------------------------------------------- |
|
AGG_INLINE int8u* pix_ptr(int x, int y) |
|
{ |
|
return m_rbuf->row_ptr(y) + sizeof(value_type) * (x * pix_step + pix_offset); |
|
} |
|
|
|
AGG_INLINE const int8u* pix_ptr(int x, int y) const |
|
{ |
|
return m_rbuf->row_ptr(y) + sizeof(value_type) * (x * pix_step + pix_offset); |
|
} |
|
|
|
// Return pointer to pixel value, forcing row to be allocated. |
|
AGG_INLINE pixel_type* pix_value_ptr(int x, int y, unsigned len) |
|
{ |
|
return (pixel_type*)(m_rbuf->row_ptr(x, y, len) + sizeof(value_type) * (x * pix_step + pix_offset)); |
|
} |
|
|
|
// Return pointer to pixel value, or null if row not allocated. |
|
AGG_INLINE const pixel_type* pix_value_ptr(int x, int y) const |
|
{ |
|
int8u* p = m_rbuf->row_ptr(y); |
|
return p ? (pixel_type*)(p + sizeof(value_type) * (x * pix_step + pix_offset)) : 0; |
|
} |
|
|
|
// Get pixel pointer from raw buffer pointer. |
|
AGG_INLINE static pixel_type* pix_value_ptr(void* p) |
|
{ |
|
return (pixel_type*)((value_type*)p + pix_offset); |
|
} |
|
|
|
// Get pixel pointer from raw buffer pointer. |
|
AGG_INLINE static const pixel_type* pix_value_ptr(const void* p) |
|
{ |
|
return (const pixel_type*)((const value_type*)p + pix_offset); |
|
} |
|
|
|
//-------------------------------------------------------------------- |
|
AGG_INLINE static void write_plain_color(void* p, color_type c) |
|
{ |
|
// Grayscale formats are implicitly premultiplied. |
|
c.premultiply(); |
|
pix_value_ptr(p)->set(c); |
|
} |
|
|
|
//-------------------------------------------------------------------- |
|
AGG_INLINE static color_type read_plain_color(const void* p) |
|
{ |
|
return pix_value_ptr(p)->get(); |
|
} |
|
|
|
//-------------------------------------------------------------------- |
|
AGG_INLINE static void make_pix(int8u* p, const color_type& c) |
|
{ |
|
((pixel_type*)p)->set(c); |
|
} |
|
|
|
//-------------------------------------------------------------------- |
|
AGG_INLINE color_type pixel(int x, int y) const |
|
{ |
|
if (const pixel_type* p = pix_value_ptr(x, y)) |
|
{ |
|
return p->get(); |
|
} |
|
return color_type::no_color(); |
|
} |
|
|
|
//-------------------------------------------------------------------- |
|
AGG_INLINE void copy_pixel(int x, int y, const color_type& c) |
|
{ |
|
pix_value_ptr(x, y, 1)->set(c); |
|
} |
|
|
|
//-------------------------------------------------------------------- |
|
AGG_INLINE void blend_pixel(int x, int y, const color_type& c, int8u cover) |
|
{ |
|
copy_or_blend_pix(pix_value_ptr(x, y, 1), c, cover); |
|
} |
|
|
|
//-------------------------------------------------------------------- |
|
AGG_INLINE void copy_hline(int x, int y, |
|
unsigned len, |
|
const color_type& c) |
|
{ |
|
pixel_type* p = pix_value_ptr(x, y, len); |
|
do |
|
{ |
|
p->set(c); |
|
p = p->next(); |
|
} |
|
while(--len); |
|
} |
|
|
|
|
|
//-------------------------------------------------------------------- |
|
AGG_INLINE void copy_vline(int x, int y, |
|
unsigned len, |
|
const color_type& c) |
|
{ |
|
do |
|
{ |
|
pix_value_ptr(x, y++, 1)->set(c); |
|
} |
|
while (--len); |
|
} |
|
|
|
|
|
//-------------------------------------------------------------------- |
|
void blend_hline(int x, int y, |
|
unsigned len, |
|
const color_type& c, |
|
int8u cover) |
|
{ |
|
if (!c.is_transparent()) |
|
{ |
|
pixel_type* p = pix_value_ptr(x, y, len); |
|
|
|
if (c.is_opaque() && cover == cover_mask) |
|
{ |
|
do |
|
{ |
|
p->set(c); |
|
p = p->next(); |
|
} |
|
while (--len); |
|
} |
|
else |
|
{ |
|
do |
|
{ |
|
blend_pix(p, c, cover); |
|
p = p->next(); |
|
} |
|
while (--len); |
|
} |
|
} |
|
} |
|
|
|
|
|
//-------------------------------------------------------------------- |
|
void blend_vline(int x, int y, |
|
unsigned len, |
|
const color_type& c, |
|
int8u cover) |
|
{ |
|
if (!c.is_transparent()) |
|
{ |
|
if (c.is_opaque() && cover == cover_mask) |
|
{ |
|
do |
|
{ |
|
pix_value_ptr(x, y++, 1)->set(c); |
|
} |
|
while (--len); |
|
} |
|
else |
|
{ |
|
do |
|
{ |
|
blend_pix(pix_value_ptr(x, y++, 1), c, cover); |
|
} |
|
while (--len); |
|
} |
|
} |
|
} |
|
|
|
|
|
//-------------------------------------------------------------------- |
|
void blend_solid_hspan(int x, int y, |
|
unsigned len, |
|
const color_type& c, |
|
const int8u* covers) |
|
{ |
|
if (!c.is_transparent()) |
|
{ |
|
pixel_type* p = pix_value_ptr(x, y, len); |
|
|
|
do |
|
{ |
|
if (c.is_opaque() && *covers == cover_mask) |
|
{ |
|
p->set(c); |
|
} |
|
else |
|
{ |
|
blend_pix(p, c, *covers); |
|
} |
|
p = p->next(); |
|
++covers; |
|
} |
|
while (--len); |
|
} |
|
} |
|
|
|
|
|
//-------------------------------------------------------------------- |
|
void blend_solid_vspan(int x, int y, |
|
unsigned len, |
|
const color_type& c, |
|
const int8u* covers) |
|
{ |
|
if (!c.is_transparent()) |
|
{ |
|
do |
|
{ |
|
pixel_type* p = pix_value_ptr(x, y++, 1); |
|
|
|
if (c.is_opaque() && *covers == cover_mask) |
|
{ |
|
p->set(c); |
|
} |
|
else |
|
{ |
|
blend_pix(p, c, *covers); |
|
} |
|
++covers; |
|
} |
|
while (--len); |
|
} |
|
} |
|
|
|
|
|
//-------------------------------------------------------------------- |
|
void copy_color_hspan(int x, int y, |
|
unsigned len, |
|
const color_type* colors) |
|
{ |
|
pixel_type* p = pix_value_ptr(x, y, len); |
|
|
|
do |
|
{ |
|
p->set(*colors++); |
|
p = p->next(); |
|
} |
|
while (--len); |
|
} |
|
|
|
|
|
//-------------------------------------------------------------------- |
|
void copy_color_vspan(int x, int y, |
|
unsigned len, |
|
const color_type* colors) |
|
{ |
|
do |
|
{ |
|
pix_value_ptr(x, y++, 1)->set(*colors++); |
|
} |
|
while (--len); |
|
} |
|
|
|
|
|
//-------------------------------------------------------------------- |
|
void blend_color_hspan(int x, int y, |
|
unsigned len, |
|
const color_type* colors, |
|
const int8u* covers, |
|
int8u cover) |
|
{ |
|
pixel_type* p = pix_value_ptr(x, y, len); |
|
|
|
if (covers) |
|
{ |
|
do |
|
{ |
|
copy_or_blend_pix(p, *colors++, *covers++); |
|
p = p->next(); |
|
} |
|
while (--len); |
|
} |
|
else |
|
{ |
|
if (cover == cover_mask) |
|
{ |
|
do |
|
{ |
|
copy_or_blend_pix(p, *colors++); |
|
p = p->next(); |
|
} |
|
while (--len); |
|
} |
|
else |
|
{ |
|
do |
|
{ |
|
copy_or_blend_pix(p, *colors++, cover); |
|
p = p->next(); |
|
} |
|
while (--len); |
|
} |
|
} |
|
} |
|
|
|
|
|
//-------------------------------------------------------------------- |
|
void blend_color_vspan(int x, int y, |
|
unsigned len, |
|
const color_type* colors, |
|
const int8u* covers, |
|
int8u cover) |
|
{ |
|
if (covers) |
|
{ |
|
do |
|
{ |
|
copy_or_blend_pix(pix_value_ptr(x, y++, 1), *colors++, *covers++); |
|
} |
|
while (--len); |
|
} |
|
else |
|
{ |
|
if (cover == cover_mask) |
|
{ |
|
do |
|
{ |
|
copy_or_blend_pix(pix_value_ptr(x, y++, 1), *colors++); |
|
} |
|
while (--len); |
|
} |
|
else |
|
{ |
|
do |
|
{ |
|
copy_or_blend_pix(pix_value_ptr(x, y++, 1), *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; |
|
pixel_type* p = pix_value_ptr(r.x1, y, len); |
|
do |
|
{ |
|
f(p->c); |
|
p = p->next(); |
|
} |
|
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) |
|
{ |
|
if (const int8u* p = from.row_ptr(ysrc)) |
|
{ |
|
std::memmove(m_rbuf->row_ptr(xdst, ydst, len) + xdst * pix_width, |
|
p + xsrc * pix_width, |
|
len * pix_width); |
|
} |
|
} |
|
|
|
//-------------------------------------------------------------------- |
|
// Blend from single color, using grayscale surface as alpha channel. |
|
template<class SrcPixelFormatRenderer> |
|
void blend_from_color(const SrcPixelFormatRenderer& from, |
|
const color_type& color, |
|
int xdst, int ydst, |
|
int xsrc, int ysrc, |
|
unsigned len, |
|
int8u cover) |
|
{ |
|
typedef typename SrcPixelFormatRenderer::pixel_type src_pixel_type; |
|
typedef typename SrcPixelFormatRenderer::color_type src_color_type; |
|
|
|
if (const src_pixel_type* psrc = from.pix_value_ptr(xsrc, ysrc)) |
|
{ |
|
pixel_type* pdst = pix_value_ptr(xdst, ydst, len); |
|
|
|
do |
|
{ |
|
copy_or_blend_pix(pdst, color, src_color_type::scale_cover(cover, psrc->c[0])); |
|
psrc = psrc->next(); |
|
pdst = pdst->next(); |
|
} |
|
while (--len); |
|
} |
|
} |
|
|
|
//-------------------------------------------------------------------- |
|
// Blend from color table, using grayscale surface as indexes into table. |
|
// Obviously, this only works for integer value types. |
|
template<class SrcPixelFormatRenderer> |
|
void blend_from_lut(const SrcPixelFormatRenderer& from, |
|
const color_type* color_lut, |
|
int xdst, int ydst, |
|
int xsrc, int ysrc, |
|
unsigned len, |
|
int8u cover) |
|
{ |
|
typedef typename SrcPixelFormatRenderer::pixel_type src_pixel_type; |
|
|
|
if (const src_pixel_type* psrc = from.pix_value_ptr(xsrc, ysrc)) |
|
{ |
|
pixel_type* pdst = pix_value_ptr(xdst, ydst, len); |
|
|
|
do |
|
{ |
|
copy_or_blend_pix(pdst, color_lut[psrc->c[0]], cover); |
|
psrc = psrc->next(); |
|
pdst = pdst->next(); |
|
} |
|
while (--len); |
|
} |
|
} |
|
|
|
private: |
|
rbuf_type* m_rbuf; |
|
}; |
|
|
|
typedef blender_gray<gray8> blender_gray8; |
|
typedef blender_gray<sgray8> blender_sgray8; |
|
typedef blender_gray<gray16> blender_gray16; |
|
typedef blender_gray<gray32> blender_gray32; |
|
|
|
typedef blender_gray_pre<gray8> blender_gray8_pre; |
|
typedef blender_gray_pre<sgray8> blender_sgray8_pre; |
|
typedef blender_gray_pre<gray16> blender_gray16_pre; |
|
typedef blender_gray_pre<gray32> blender_gray32_pre; |
|
|
|
typedef pixfmt_alpha_blend_gray<blender_gray8, rendering_buffer> pixfmt_gray8; |
|
typedef pixfmt_alpha_blend_gray<blender_sgray8, rendering_buffer> pixfmt_sgray8; |
|
typedef pixfmt_alpha_blend_gray<blender_gray16, rendering_buffer> pixfmt_gray16; |
|
typedef pixfmt_alpha_blend_gray<blender_gray32, rendering_buffer> pixfmt_gray32; |
|
|
|
typedef pixfmt_alpha_blend_gray<blender_gray8_pre, rendering_buffer> pixfmt_gray8_pre; |
|
typedef pixfmt_alpha_blend_gray<blender_sgray8_pre, rendering_buffer> pixfmt_sgray8_pre; |
|
typedef pixfmt_alpha_blend_gray<blender_gray16_pre, rendering_buffer> pixfmt_gray16_pre; |
|
typedef pixfmt_alpha_blend_gray<blender_gray32_pre, rendering_buffer> pixfmt_gray32_pre; |
|
} |
|
|
|
#endif |
|
|
|
|