src/libnr/nr-gradient.h

   1 #ifndef __NR_GRADIENT_H__
   2 #define __NR_GRADIENT_H__
   3
   4 /*
   5  * Pixel buffer rendering library
   6  *
   7  * Authors:
   8  *   Lauris Kaplinski <lauris@kaplinski.com>
   9  *
  10  * This code is in public domain
  11  */
  12
  13 #include <libnr/nr-matrix.h>
  14 #include <libnr/nr-render.h>
  15
  16 #define NR_GRADIENT_VECTOR_LENGTH 1024
  17
  18 enum {
  19         NR_GRADIENT_SPREAD_PAD,
  20         NR_GRADIENT_SPREAD_REFLECT,
  21         NR_GRADIENT_SPREAD_REPEAT
  22 };
  23
  24 /* Radial */
  25
  26 struct NRRGradientRenderer {
  27         NRRenderer renderer;
  28         const unsigned char *vector;
  29         unsigned int spread;
  30         NRMatrix px2gs;
  31         float cx, cy;
  32         float fx, fy;
  33         float r;
  34         float C;
  35 };
  36
  37 NRRenderer *nr_rgradient_renderer_setup (NRRGradientRenderer *rgr,
  38                                          const unsigned char *cv,
  39                                          unsigned int spread,
  40                                          const NRMatrix *gs2px,
  41                                          float cx, float cy,
  42                                          float fx, float fy,
  43                                          float r);
  44
  45
  46
  47 #endif