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https://github.com/scummvm/scummvm.git
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Giulio Camuffo
71 lines
1.7 KiB
C++
71 lines
1.7 KiB
C++
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#include "graphics/tinygl/zbuffer.h"
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namespace TinyGL {
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#define ZCMP(z,zpix) ((z) >= (zpix))
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void ZB_plot(ZBuffer * zb, ZBufferPoint * p) {
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unsigned int *pz;
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PIXEL *pp;
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pz = zb->zbuf + (p->y * zb->xsize + p->x);
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pp = (PIXEL *)((char *) zb->pbuf.getRawBuffer() + zb->linesize * p->y + p->x * PSZB);
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if (ZCMP((unsigned int)p->z, *pz)) {
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*pp = RGB_TO_PIXEL(p->r, p->g, p->b);
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*pz = p->z;
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}
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}
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#define INTERP_Z
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static void ZB_line_flat_z(ZBuffer *zb, ZBufferPoint *p1, ZBufferPoint *p2, int color) {
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#include "graphics/tinygl/zline.h"
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}
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// line with color interpolation
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#define INTERP_Z
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#define INTERP_RGB
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static void ZB_line_interp_z(ZBuffer *zb, ZBufferPoint *p1, ZBufferPoint *p2) {
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#include "graphics/tinygl/zline.h"
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}
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// no Z interpolation
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static void ZB_line_flat(ZBuffer *zb, ZBufferPoint *p1, ZBufferPoint *p2, int color) {
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#include "graphics/tinygl/zline.h"
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}
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#define INTERP_RGB
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static void ZB_line_interp(ZBuffer *zb, ZBufferPoint *p1, ZBufferPoint *p2) {
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#include "graphics/tinygl/zline.h"
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}
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void ZB_line_z(ZBuffer *zb, ZBufferPoint *p1, ZBufferPoint *p2) {
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int color1, color2;
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color1 = RGB_TO_PIXEL(p1->r, p1->g, p1->b);
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color2 = RGB_TO_PIXEL(p2->r, p2->g, p2->b);
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// choose if the line should have its color interpolated or not
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if (color1 == color2) {
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ZB_line_flat_z(zb, p1, p2, color1);
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} else {
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ZB_line_interp_z(zb, p1, p2);
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}
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}
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void ZB_line(ZBuffer *zb, ZBufferPoint *p1, ZBufferPoint *p2) {
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int color1, color2;
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color1 = RGB_TO_PIXEL(p1->r, p1->g, p1->b);
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color2 = RGB_TO_PIXEL(p2->r, p2->g, p2->b);
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// choose if the line should have its color interpolated or not
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if (color1 == color2) {
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ZB_line_flat(zb, p1, p2, color1);
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} else {
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ZB_line_interp(zb, p1, p2);
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}
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}
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} // end of namespace TinyGL
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