prj/tech/libsrc/g2/plyparam.h

   1 // $Header: x:/prj/tech/libsrc/g2/RCS/plyparam.h 1.5 1998/04/28 14:29:16 KEVIN Exp $
   2
   3 #ifndef __PLYPARAM_H
   4 #define __PLYPARAM_H
   5
   6 #include <dev2d.h>
   7 #include <plyrast.h>
   8 #include <g2spoint.h>
   9
  10 #define G2C_NUM_POLY_COORD 8
  11
  12 typedef struct g2s_poly_params g2s_poly_params;
  13
  14 typedef void (g2il_func)(g2s_raster *r, g2s_poly_params *p);
  15 typedef void (g2raster_func)(g2s_poly_params *p, int num_scanlines);
  16 typedef void (g2edge_func)(g2s_point *prev, g2s_point *next, g2s_poly_params *p);
  17 typedef int (g2poly_func)(int n, g2s_point **ppl);
  18 typedef void (g2grad_func)(g2s_point *p0, g2s_point *p1, g2s_point *p2, g2s_poly_params *p);
  19
  20 typedef struct g2s_raster_list {
  21    union {
  22       uchar *bytes;
  23       g2s_raster *raster;
  24    };
  25 } g2s_raster_list;
  26
  27 typedef struct left_edge {
  28    int x,dx;
  29    ulong x_frac, dx_frac;
  30    fix coord_val[G2C_NUM_POLY_COORD];
  31    fix coord_delta[G2C_NUM_POLY_COORD];
  32 } left_edge;
  33
  34 typedef struct right_edge {
  35    fix x,dx;
  36 } right_edge;
  37
  38 struct g2s_poly_params {
  39    g2s_raster_list raster_list;
  40    int raster_row;
  41    union {
  42       uchar *p;
  43       int y;
  44    };
  45    union {
  46       int canvas_row;
  47       int dy;
  48    };
  49    ulong flags;
  50    grs_bitmap *bm;
  51    union {
  52       gdupix_func *pix_func;
  53       gdulin_func *hline_func;
  54    };
  55    gdlpix_func *lpix_func;
  56    union { // coordinate gradients wrt canvas x (dc/dx)
  57       fix dcx[G2C_NUM_POLY_COORD];
  58       // first five coords are intensity, texture u, texture v, haze, dryness
  59       struct {
  60          fix dix, dux, dvx, dhx, ddx;
  61       };
  62    };
  63    union { // coordinate gradients wrt canvas y (dc/dy)
  64       fix dcy[G2C_NUM_POLY_COORD];
  65       struct {
  66          fix diy, duy, dvy, dhy, ddy;
  67       };
  68    };
  69    union { // Scale factor for each coordinate; Applied when calculating gradients.
  70       float scale[G2C_NUM_POLY_COORD];
  71       struct {
  72          float i_scale, u_scale, v_scale, h_scale, d_scale;
  73       };
  74    };
  75    left_edge left;
  76    right_edge right;
  77    g2il_func *inner_loop;
  78    g2raster_func *raster_func;
  79    g2edge_func *left_edge_func;
  80    g2edge_func *right_edge_func;
  81    g2poly_func *poly_func;
  82    g2grad_func *grad_func;
  83    int clip_type;
  84    int ytop, yright, yleft;
  85 };
  86
  87 #endif