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Rev | Author | Line No. | Line |
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5098 | clevermous | 1 | #include |
2 | #include "zbuffer.h" |
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3 | |||
4 | #define ZCMP(z,zpix) ((z) >= (zpix)) |
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5 | |||
6 | void ZB_plot(ZBuffer * zb, ZBufferPoint * p) |
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7 | { |
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8 | unsigned short *pz; |
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9 | PIXEL *pp; |
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10 | int zz; |
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11 | |||
12 | pz = zb->zbuf + (p->y * zb->xsize + p->x); |
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13 | pp = (PIXEL *) ((char *) zb->pbuf + zb->linesize * p->y + p->x * PSZB); |
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14 | zz = p->z >> ZB_POINT_Z_FRAC_BITS; |
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15 | if (ZCMP(zz, *pz)) { |
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16 | #if TGL_FEATURE_RENDER_BITS == 24 |
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17 | pp[0]=p->r>>8; |
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18 | pp[1]=p->g>>8; |
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19 | pp[2]=p->b>>8; |
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20 | #else |
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21 | *pp = RGB_TO_PIXEL(p->r, p->g, p->b); |
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22 | #endif |
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23 | *pz = zz; |
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24 | } |
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25 | } |
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26 | |||
27 | #define INTERP_Z |
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28 | static void ZB_line_flat_z(ZBuffer * zb, ZBufferPoint * p1, ZBufferPoint * p2, |
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29 | int color) |
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30 | { |
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31 | #include "zline.h" |
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32 | } |
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33 | |||
34 | /* line with color interpolation */ |
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35 | #define INTERP_Z |
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36 | #define INTERP_RGB |
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37 | static void ZB_line_interp_z(ZBuffer * zb, ZBufferPoint * p1, ZBufferPoint * p2) |
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38 | { |
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39 | #include "zline.h" |
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40 | } |
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41 | |||
42 | /* no Z interpolation */ |
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43 | |||
44 | static void ZB_line_flat(ZBuffer * zb, ZBufferPoint * p1, ZBufferPoint * p2, |
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45 | int color) |
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46 | { |
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47 | #include "zline.h" |
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48 | } |
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49 | |||
50 | #define INTERP_RGB |
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51 | static void ZB_line_interp(ZBuffer * zb, ZBufferPoint * p1, ZBufferPoint * p2) |
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52 | { |
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53 | #include "zline.h" |
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54 | } |
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55 | |||
56 | void ZB_line_z(ZBuffer * zb, ZBufferPoint * p1, ZBufferPoint * p2) |
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57 | { |
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58 | int color1, color2; |
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59 | |||
60 | color1 = RGB_TO_PIXEL(p1->r, p1->g, p1->b); |
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61 | color2 = RGB_TO_PIXEL(p2->r, p2->g, p2->b); |
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62 | |||
63 | /* choose if the line should have its color interpolated or not */ |
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64 | if (color1 == color2) { |
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65 | ZB_line_flat_z(zb, p1, p2, color1); |
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66 | } else { |
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67 | ZB_line_interp_z(zb, p1, p2); |
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68 | } |
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69 | } |
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70 | |||
71 | void ZB_line(ZBuffer * zb, ZBufferPoint * p1, ZBufferPoint * p2) |
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72 | { |
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73 | int color1, color2; |
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74 | |||
75 | color1 = RGB_TO_PIXEL(p1->r, p1->g, p1->b); |
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76 | color2 = RGB_TO_PIXEL(p2->r, p2->g, p2->b); |
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77 | |||
78 | /* choose if the line should have its color interpolated or not */ |
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79 | if (color1 == color2) { |
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80 | ZB_line_flat(zb, p1, p2, color1); |
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81 | } else { |
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82 | ZB_line_interp(zb, p1, p2); |
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83 | } |
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84 | } |