| 0,0 → 1,84 |
|---|
| #include <stdlib.h> |
| #include "zbuffer.h" |
| |
| #define ZCMP(z,zpix) ((z) >= (zpix)) |
| |
| void ZB_plot(ZBuffer * zb, ZBufferPoint * p) |
| { |
| unsigned short *pz; |
| PIXEL *pp; |
| int zz; |
| |
| pz = zb->zbuf + (p->y * zb->xsize + p->x); |
| pp = (PIXEL *) ((char *) zb->pbuf + zb->linesize * p->y + p->x * PSZB); |
| zz = p->z >> ZB_POINT_Z_FRAC_BITS; |
| if (ZCMP(zz, *pz)) { |
| #if TGL_FEATURE_RENDER_BITS == 24 |
| pp[0]=p->r>>8; |
| pp[1]=p->g>>8; |
| pp[2]=p->b>>8; |
| #else |
| *pp = RGB_TO_PIXEL(p->r, p->g, p->b); |
| #endif |
| *pz = zz; |
| } |
| } |
| |
| #define INTERP_Z |
| static void ZB_line_flat_z(ZBuffer * zb, ZBufferPoint * p1, ZBufferPoint * p2, |
| int color) |
| { |
| #include "zline.h" |
| } |
| |
| /* line with color interpolation */ |
| #define INTERP_Z |
| #define INTERP_RGB |
| static void ZB_line_interp_z(ZBuffer * zb, ZBufferPoint * p1, ZBufferPoint * p2) |
| { |
| #include "zline.h" |
| } |
| |
| /* no Z interpolation */ |
| |
| static void ZB_line_flat(ZBuffer * zb, ZBufferPoint * p1, ZBufferPoint * p2, |
| int color) |
| { |
| #include "zline.h" |
| } |
| |
| #define INTERP_RGB |
| static void ZB_line_interp(ZBuffer * zb, ZBufferPoint * p1, ZBufferPoint * p2) |
| { |
| #include "zline.h" |
| } |
| |
| void ZB_line_z(ZBuffer * zb, ZBufferPoint * p1, ZBufferPoint * p2) |
| { |
| int color1, color2; |
| |
| color1 = RGB_TO_PIXEL(p1->r, p1->g, p1->b); |
| color2 = RGB_TO_PIXEL(p2->r, p2->g, p2->b); |
| |
| /* choose if the line should have its color interpolated or not */ |
| if (color1 == color2) { |
| ZB_line_flat_z(zb, p1, p2, color1); |
| } else { |
| ZB_line_interp_z(zb, p1, p2); |
| } |
| } |
| |
| void ZB_line(ZBuffer * zb, ZBufferPoint * p1, ZBufferPoint * p2) |
| { |
| int color1, color2; |
| |
| color1 = RGB_TO_PIXEL(p1->r, p1->g, p1->b); |
| color2 = RGB_TO_PIXEL(p2->r, p2->g, p2->b); |
| |
| /* choose if the line should have its color interpolated or not */ |
| if (color1 == color2) { |
| ZB_line_flat(zb, p1, p2, color1); |
| } else { |
| ZB_line_interp(zb, p1, p2); |
| } |
| } |