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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 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 | } |