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#ifndef __NR_GRADIENT_H__
#define __NR_GRADIENT_H__
/*
* Pixel buffer rendering library
*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
*
* Copyright (C) 2001-2002 Lauris Kaplinski
* Copyright (C) 2001-2002 Ximian, Inc.
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
/*
* Derived in part from public domain code by Lauris Kaplinski
*/
#include <libnr/nr-matrix.h>
#include <libnr/nr-render.h>
#define NR_GRADIENT_VECTOR_BITS 10
#define NR_GRADIENT_VECTOR_LENGTH (1<<NR_GRADIENT_VECTOR_BITS)
enum NRGradientSpread {
NR_GRADIENT_SPREAD_PAD,
NR_GRADIENT_SPREAD_REFLECT,
NR_GRADIENT_SPREAD_REPEAT
};
struct NRGradientRenderer : public NRRenderer {
const unsigned char *vector;
unsigned int spread;
};
/* Linear */
struct NRLGradientRenderer : public NRGradientRenderer {
double x0, y0;
double dx, dy;
};
NRRenderer *nr_lgradient_renderer_setup (NRLGradientRenderer *lgr,
const unsigned char *cv,
unsigned int spread,
const NR::Matrix *gs2px,
float x0, float y0,
float x1, float y1);
/* Radial */
struct NRRGradientRenderer : public NRGradientRenderer {
NR::Matrix px2gs;
float cx, cy;
float fx, fy;
float r;
float C;
};
NRRenderer *nr_rgradient_renderer_setup (NRRGradientRenderer *rgr,
const unsigned char *cv,
unsigned int spread,
const NR::Matrix *gs2px,
float cx, float cy,
float fx, float fy,
float r);
#endif
/*
* Local Variables:
* mode:c++
* c-file-style:"stroustrup"
* c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
* indent-tabs-mode:nil
* fill-column:99
* End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
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