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diff --git a/libraries/irrlicht-1.8.1/source/Irrlicht/CTRTextureGouraudNoZ2.cpp b/libraries/irrlicht-1.8.1/source/Irrlicht/CTRTextureGouraudNoZ2.cpp
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1// Copyright (C) 2002-2012 Nikolaus Gebhardt / Thomas Alten
2// This file is part of the "Irrlicht Engine".
3// For conditions of distribution and use, see copyright notice in irrlicht.h
4
5#include "IrrCompileConfig.h"
6#include "IBurningShader.h"
7
8#ifdef _IRR_COMPILE_WITH_BURNINGSVIDEO_
9
10// compile flag for this file
11#undef USE_ZBUFFER
12#undef IPOL_Z
13#undef CMP_Z
14#undef WRITE_Z
15
16#undef IPOL_W
17#undef CMP_W
18#undef WRITE_W
19
20#undef SUBTEXEL
21#undef INVERSE_W
22
23#undef IPOL_C0
24#undef IPOL_T0
25#undef IPOL_T1
26
27// define render case
28#ifdef BURNINGVIDEO_RENDERER_FAST
29 #define SUBTEXEL
30 #define INVERSE_W
31#else
32 #define SUBTEXEL
33 #define INVERSE_W
34#endif
35
36//#define USE_ZBUFFER
37#define IPOL_W
38//#define CMP_W
39//#define WRITE_W
40
41//#define IPOL_C0
42#define IPOL_T0
43//#define IPOL_T1
44
45#ifndef SOFTWARE_DRIVER_2_USE_VERTEX_COLOR
46 #undef IPOL_C0
47#endif
48
49// apply global override
50#ifndef SOFTWARE_DRIVER_2_PERSPECTIVE_CORRECT
51 #undef INVERSE_W
52 #ifndef SOFTWARE_DRIVER_2_PERSPECTIVE_CORRECT
53 #undef IPOL_W
54 #endif
55#endif
56
57#ifndef SOFTWARE_DRIVER_2_SUBTEXEL
58 #undef SUBTEXEL
59#endif
60
61#if !defined ( SOFTWARE_DRIVER_2_USE_WBUFFER ) && defined ( USE_ZBUFFER )
62 #define IPOL_Z
63
64 #ifdef CMP_W
65 #undef CMP_W
66 #define CMP_Z
67 #endif
68
69 #ifdef WRITE_W
70 #undef WRITE_W
71 #define WRITE_Z
72 #endif
73
74#endif
75
76
77namespace irr
78{
79
80namespace video
81{
82
83class CTRTextureGouraudNoZ2 : public IBurningShader
84{
85public:
86
87 //! constructor
88 CTRTextureGouraudNoZ2(CBurningVideoDriver* driver);
89
90 //! draws an indexed triangle list
91 virtual void drawTriangle ( const s4DVertex *a,const s4DVertex *b,const s4DVertex *c );
92
93
94private:
95 void scanline_bilinear ();
96 sScanConvertData scan;
97 sScanLineData line;
98
99};
100
101//! constructor
102CTRTextureGouraudNoZ2::CTRTextureGouraudNoZ2(CBurningVideoDriver* driver)
103: IBurningShader(driver)
104{
105 #ifdef _DEBUG
106 setDebugName("CTRTextureGouraudNoZ2");
107 #endif
108}
109
110
111
112/*!
113*/
114void CTRTextureGouraudNoZ2::scanline_bilinear ( )
115{
116 tVideoSample *dst;
117
118#ifdef USE_ZBUFFER
119 fp24 *z;
120#endif
121
122 s32 xStart;
123 s32 xEnd;
124 s32 dx;
125
126
127#ifdef SUBTEXEL
128 f32 subPixel;
129#endif
130
131#ifdef IPOL_Z
132 f32 slopeZ;
133#endif
134#ifdef IPOL_W
135 fp24 slopeW;
136#endif
137#ifdef IPOL_C0
138 sVec4 slopeC;
139#endif
140#ifdef IPOL_T0
141 sVec2 slopeT[BURNING_MATERIAL_MAX_TEXTURES];
142#endif
143
144 // apply top-left fill-convention, left
145 xStart = core::ceil32( line.x[0] );
146 xEnd = core::ceil32( line.x[1] ) - 1;
147
148 dx = xEnd - xStart;
149
150 if ( dx < 0 )
151 return;
152
153 // slopes
154 const f32 invDeltaX = core::reciprocal_approxim ( line.x[1] - line.x[0] );
155
156#ifdef IPOL_Z
157 slopeZ = (line.z[1] - line.z[0]) * invDeltaX;
158#endif
159#ifdef IPOL_W
160 slopeW = (line.w[1] - line.w[0]) * invDeltaX;
161#endif
162#ifdef IPOL_C0
163 slopeC = (line.c[1] - line.c[0]) * invDeltaX;
164#endif
165#ifdef IPOL_T0
166 slopeT[0] = (line.t[0][1] - line.t[0][0]) * invDeltaX;
167#endif
168#ifdef IPOL_T1
169 slopeT[1] = (line.t[1][1] - line.t[1][0]) * invDeltaX;
170#endif
171
172#ifdef SUBTEXEL
173 subPixel = ( (f32) xStart ) - line.x[0];
174#ifdef IPOL_Z
175 line.z[0] += slopeZ * subPixel;
176#endif
177#ifdef IPOL_W
178 line.w[0] += slopeW * subPixel;
179#endif
180#ifdef IPOL_C0
181 line.c[0] += slopeC * subPixel;
182#endif
183#ifdef IPOL_T0
184 line.t[0][0] += slopeT[0] * subPixel;
185#endif
186#ifdef IPOL_T1
187 line.t[1][0] += slopeT[1] * subPixel;
188#endif
189#endif
190
191 dst = (tVideoSample*)RenderTarget->lock() + ( line.y * RenderTarget->getDimension().Width ) + xStart;
192
193#ifdef USE_ZBUFFER
194 z = (fp24*) DepthBuffer->lock() + ( line.y * RenderTarget->getDimension().Width ) + xStart;
195#endif
196
197
198#ifdef INVERSE_W
199 f32 inversew;
200#endif
201
202 tFixPoint tx0;
203 tFixPoint ty0;
204
205
206 for ( s32 i = 0; i <= dx; ++i )
207 {
208#ifdef CMP_Z
209 if ( line.z[0] < z[i] )
210#endif
211#ifdef CMP_W
212 if ( line.w[0] >= z[i] )
213#endif
214
215 {
216#ifdef INVERSE_W
217 inversew = fix_inverse32 ( line.w[0] );
218
219 tx0 = tofix ( line.t[0][0].x,inversew);
220 ty0 = tofix ( line.t[0][0].y,inversew);
221#else
222 tx0 = tofix ( line.t[0][0].x );
223 ty0 = tofix ( line.t[0][0].y );
224#endif
225 dst[i] = getTexel_plain ( &IT[0], tx0, ty0 );
226
227/*
228 getSample_texture ( r0, g0, b0, &IT[0], tx0, ty0 );
229 dst[i] = fix_to_color ( r0, g0, b0 );
230*/
231#ifdef WRITE_Z
232 z[i] = line.z[0];
233#endif
234#ifdef WRITE_W
235 z[i] = line.w[0];
236#endif
237 }
238
239#ifdef IPOL_Z
240 line.z[0] += slopeZ;
241#endif
242#ifdef IPOL_W
243 line.w[0] += slopeW;
244#endif
245#ifdef IPOL_C0
246 line.c[0] += slopeC;
247#endif
248#ifdef IPOL_T0
249 line.t[0][0] += slopeT[0];
250#endif
251#ifdef IPOL_T1
252 line.t[1][0] += slopeT[1];
253#endif
254 }
255
256}
257
258void CTRTextureGouraudNoZ2::drawTriangle ( const s4DVertex *a,const s4DVertex *b,const s4DVertex *c )
259{
260 // sort on height, y
261 if ( F32_A_GREATER_B ( a->Pos.y , b->Pos.y ) ) swapVertexPointer(&a, &b);
262 if ( F32_A_GREATER_B ( b->Pos.y , c->Pos.y ) ) swapVertexPointer(&b, &c);
263 if ( F32_A_GREATER_B ( a->Pos.y , b->Pos.y ) ) swapVertexPointer(&a, &b);
264
265 const f32 ca = c->Pos.y - a->Pos.y;
266 const f32 ba = b->Pos.y - a->Pos.y;
267 const f32 cb = c->Pos.y - b->Pos.y;
268 // calculate delta y of the edges
269 scan.invDeltaY[0] = core::reciprocal( ca );
270 scan.invDeltaY[1] = core::reciprocal( ba );
271 scan.invDeltaY[2] = core::reciprocal( cb );
272
273 if ( F32_LOWER_EQUAL_0 ( scan.invDeltaY[0] ) )
274 return;
275
276 // find if the major edge is left or right aligned
277 f32 temp[4];
278
279 temp[0] = a->Pos.x - c->Pos.x;
280 temp[1] = -ca;
281 temp[2] = b->Pos.x - a->Pos.x;
282 temp[3] = ba;
283
284 scan.left = ( temp[0] * temp[3] - temp[1] * temp[2] ) > 0.f ? 0 : 1;
285 scan.right = 1 - scan.left;
286
287 // calculate slopes for the major edge
288 scan.slopeX[0] = (c->Pos.x - a->Pos.x) * scan.invDeltaY[0];
289 scan.x[0] = a->Pos.x;
290
291#ifdef IPOL_Z
292 scan.slopeZ[0] = (c->Pos.z - a->Pos.z) * scan.invDeltaY[0];
293 scan.z[0] = a->Pos.z;
294#endif
295
296#ifdef IPOL_W
297 scan.slopeW[0] = (c->Pos.w - a->Pos.w) * scan.invDeltaY[0];
298 scan.w[0] = a->Pos.w;
299#endif
300
301#ifdef IPOL_C0
302 scan.slopeC[0] = (c->Color[0] - a->Color[0]) * scan.invDeltaY[0];
303 scan.c[0] = a->Color[0];
304#endif
305
306#ifdef IPOL_T0
307 scan.slopeT[0][0] = (c->Tex[0] - a->Tex[0]) * scan.invDeltaY[0];
308 scan.t[0][0] = a->Tex[0];
309#endif
310
311#ifdef IPOL_T1
312 scan.slopeT[1][0] = (c->Tex[1] - a->Tex[1]) * scan.invDeltaY[0];
313 scan.t[1][0] = a->Tex[1];
314#endif
315
316 // top left fill convention y run
317 s32 yStart;
318 s32 yEnd;
319
320#ifdef SUBTEXEL
321 f32 subPixel;
322#endif
323
324 // rasterize upper sub-triangle
325 if ( (f32) 0.0 != scan.invDeltaY[1] )
326 {
327 // calculate slopes for top edge
328 scan.slopeX[1] = (b->Pos.x - a->Pos.x) * scan.invDeltaY[1];
329 scan.x[1] = a->Pos.x;
330
331#ifdef IPOL_Z
332 scan.slopeZ[1] = (b->Pos.z - a->Pos.z) * scan.invDeltaY[1];
333 scan.z[1] = a->Pos.z;
334#endif
335
336#ifdef IPOL_W
337 scan.slopeW[1] = (b->Pos.w - a->Pos.w) * scan.invDeltaY[1];
338 scan.w[1] = a->Pos.w;
339#endif
340
341#ifdef IPOL_C0
342 scan.slopeC[1] = (b->Color[0] - a->Color[0]) * scan.invDeltaY[1];
343 scan.c[1] = a->Color[0];
344#endif
345
346#ifdef IPOL_T0
347 scan.slopeT[0][1] = (b->Tex[0] - a->Tex[0]) * scan.invDeltaY[1];
348 scan.t[0][1] = a->Tex[0];
349#endif
350
351#ifdef IPOL_T1
352 scan.slopeT[1][1] = (b->Tex[1] - a->Tex[1]) * scan.invDeltaY[1];
353 scan.t[1][1] = a->Tex[1];
354#endif
355
356 // apply top-left fill convention, top part
357 yStart = core::ceil32( a->Pos.y );
358 yEnd = core::ceil32( b->Pos.y ) - 1;
359
360#ifdef SUBTEXEL
361 subPixel = ( (f32) yStart ) - a->Pos.y;
362
363 // correct to pixel center
364 scan.x[0] += scan.slopeX[0] * subPixel;
365 scan.x[1] += scan.slopeX[1] * subPixel;
366
367#ifdef IPOL_Z
368 scan.z[0] += scan.slopeZ[0] * subPixel;
369 scan.z[1] += scan.slopeZ[1] * subPixel;
370#endif
371
372#ifdef IPOL_W
373 scan.w[0] += scan.slopeW[0] * subPixel;
374 scan.w[1] += scan.slopeW[1] * subPixel;
375#endif
376
377#ifdef IPOL_C0
378 scan.c[0] += scan.slopeC[0] * subPixel;
379 scan.c[1] += scan.slopeC[1] * subPixel;
380#endif
381
382#ifdef IPOL_T0
383 scan.t[0][0] += scan.slopeT[0][0] * subPixel;
384 scan.t[0][1] += scan.slopeT[0][1] * subPixel;
385#endif
386
387#ifdef IPOL_T1
388 scan.t[1][0] += scan.slopeT[1][0] * subPixel;
389 scan.t[1][1] += scan.slopeT[1][1] * subPixel;
390#endif
391
392#endif
393
394 // rasterize the edge scanlines
395 for( line.y = yStart; line.y <= yEnd; ++line.y)
396 {
397 line.x[scan.left] = scan.x[0];
398 line.x[scan.right] = scan.x[1];
399
400#ifdef IPOL_Z
401 line.z[scan.left] = scan.z[0];
402 line.z[scan.right] = scan.z[1];
403#endif
404
405#ifdef IPOL_W
406 line.w[scan.left] = scan.w[0];
407 line.w[scan.right] = scan.w[1];
408#endif
409
410#ifdef IPOL_C0
411 line.c[scan.left] = scan.c[0];
412 line.c[scan.right] = scan.c[1];
413#endif
414
415#ifdef IPOL_T0
416 line.t[0][scan.left] = scan.t[0][0];
417 line.t[0][scan.right] = scan.t[0][1];
418#endif
419
420#ifdef IPOL_T1
421 line.t[1][scan.left] = scan.t[1][0];
422 line.t[1][scan.right] = scan.t[1][1];
423#endif
424
425 // render a scanline
426 scanline_bilinear ( );
427
428 scan.x[0] += scan.slopeX[0];
429 scan.x[1] += scan.slopeX[1];
430
431#ifdef IPOL_Z
432 scan.z[0] += scan.slopeZ[0];
433 scan.z[1] += scan.slopeZ[1];
434#endif
435
436#ifdef IPOL_W
437 scan.w[0] += scan.slopeW[0];
438 scan.w[1] += scan.slopeW[1];
439#endif
440
441#ifdef IPOL_C0
442 scan.c[0] += scan.slopeC[0];
443 scan.c[1] += scan.slopeC[1];
444#endif
445
446#ifdef IPOL_T0
447 scan.t[0][0] += scan.slopeT[0][0];
448 scan.t[0][1] += scan.slopeT[0][1];
449#endif
450
451#ifdef IPOL_T1
452 scan.t[1][0] += scan.slopeT[1][0];
453 scan.t[1][1] += scan.slopeT[1][1];
454#endif
455
456 }
457 }
458
459 // rasterize lower sub-triangle
460 if ( (f32) 0.0 != scan.invDeltaY[2] )
461 {
462 // advance to middle point
463 if( (f32) 0.0 != scan.invDeltaY[1] )
464 {
465 temp[0] = b->Pos.y - a->Pos.y; // dy
466
467 scan.x[0] = a->Pos.x + scan.slopeX[0] * temp[0];
468#ifdef IPOL_Z
469 scan.z[0] = a->Pos.z + scan.slopeZ[0] * temp[0];
470#endif
471#ifdef IPOL_W
472 scan.w[0] = a->Pos.w + scan.slopeW[0] * temp[0];
473#endif
474#ifdef IPOL_C0
475 scan.c[0] = a->Color[0] + scan.slopeC[0] * temp[0];
476#endif
477#ifdef IPOL_T0
478 scan.t[0][0] = a->Tex[0] + scan.slopeT[0][0] * temp[0];
479#endif
480#ifdef IPOL_T1
481 scan.t[1][0] = a->Tex[1] + scan.slopeT[1][0] * temp[0];
482#endif
483
484 }
485
486 // calculate slopes for bottom edge
487 scan.slopeX[1] = (c->Pos.x - b->Pos.x) * scan.invDeltaY[2];
488 scan.x[1] = b->Pos.x;
489
490#ifdef IPOL_Z
491 scan.slopeZ[1] = (c->Pos.z - b->Pos.z) * scan.invDeltaY[2];
492 scan.z[1] = b->Pos.z;
493#endif
494
495#ifdef IPOL_W
496 scan.slopeW[1] = (c->Pos.w - b->Pos.w) * scan.invDeltaY[2];
497 scan.w[1] = b->Pos.w;
498#endif
499
500#ifdef IPOL_C0
501 scan.slopeC[1] = (c->Color[0] - b->Color[0]) * scan.invDeltaY[2];
502 scan.c[1] = b->Color[0];
503#endif
504
505#ifdef IPOL_T0
506 scan.slopeT[0][1] = (c->Tex[0] - b->Tex[0]) * scan.invDeltaY[2];
507 scan.t[0][1] = b->Tex[0];
508#endif
509
510#ifdef IPOL_T1
511 scan.slopeT[1][1] = (c->Tex[1] - b->Tex[1]) * scan.invDeltaY[2];
512 scan.t[1][1] = b->Tex[1];
513#endif
514
515 // apply top-left fill convention, top part
516 yStart = core::ceil32( b->Pos.y );
517 yEnd = core::ceil32( c->Pos.y ) - 1;
518
519#ifdef SUBTEXEL
520
521 subPixel = ( (f32) yStart ) - b->Pos.y;
522
523 // correct to pixel center
524 scan.x[0] += scan.slopeX[0] * subPixel;
525 scan.x[1] += scan.slopeX[1] * subPixel;
526
527#ifdef IPOL_Z
528 scan.z[0] += scan.slopeZ[0] * subPixel;
529 scan.z[1] += scan.slopeZ[1] * subPixel;
530#endif
531
532#ifdef IPOL_W
533 scan.w[0] += scan.slopeW[0] * subPixel;
534 scan.w[1] += scan.slopeW[1] * subPixel;
535#endif
536
537#ifdef IPOL_C0
538 scan.c[0] += scan.slopeC[0] * subPixel;
539 scan.c[1] += scan.slopeC[1] * subPixel;
540#endif
541
542#ifdef IPOL_T0
543 scan.t[0][0] += scan.slopeT[0][0] * subPixel;
544 scan.t[0][1] += scan.slopeT[0][1] * subPixel;
545#endif
546
547#ifdef IPOL_T1
548 scan.t[1][0] += scan.slopeT[1][0] * subPixel;
549 scan.t[1][1] += scan.slopeT[1][1] * subPixel;
550#endif
551
552#endif
553
554 // rasterize the edge scanlines
555 for( line.y = yStart; line.y <= yEnd; ++line.y)
556 {
557 line.x[scan.left] = scan.x[0];
558 line.x[scan.right] = scan.x[1];
559
560#ifdef IPOL_Z
561 line.z[scan.left] = scan.z[0];
562 line.z[scan.right] = scan.z[1];
563#endif
564
565#ifdef IPOL_W
566 line.w[scan.left] = scan.w[0];
567 line.w[scan.right] = scan.w[1];
568#endif
569
570#ifdef IPOL_C0
571 line.c[scan.left] = scan.c[0];
572 line.c[scan.right] = scan.c[1];
573#endif
574
575#ifdef IPOL_T0
576 line.t[0][scan.left] = scan.t[0][0];
577 line.t[0][scan.right] = scan.t[0][1];
578#endif
579
580#ifdef IPOL_T1
581 line.t[1][scan.left] = scan.t[1][0];
582 line.t[1][scan.right] = scan.t[1][1];
583#endif
584
585 // render a scanline
586 scanline_bilinear ();
587
588 scan.x[0] += scan.slopeX[0];
589 scan.x[1] += scan.slopeX[1];
590
591#ifdef IPOL_Z
592 scan.z[0] += scan.slopeZ[0];
593 scan.z[1] += scan.slopeZ[1];
594#endif
595
596#ifdef IPOL_W
597 scan.w[0] += scan.slopeW[0];
598 scan.w[1] += scan.slopeW[1];
599#endif
600
601#ifdef IPOL_C0
602 scan.c[0] += scan.slopeC[0];
603 scan.c[1] += scan.slopeC[1];
604#endif
605
606#ifdef IPOL_T0
607 scan.t[0][0] += scan.slopeT[0][0];
608 scan.t[0][1] += scan.slopeT[0][1];
609#endif
610
611#ifdef IPOL_T1
612 scan.t[1][0] += scan.slopeT[1][0];
613 scan.t[1][1] += scan.slopeT[1][1];
614#endif
615
616 }
617 }
618
619}
620
621
622} // end namespace video
623} // end namespace irr
624
625#endif // _IRR_COMPILE_WITH_BURNINGSVIDEO_
626
627namespace irr
628{
629namespace video
630{
631
632//! creates a flat triangle renderer
633IBurningShader* createTRTextureGouraudNoZ2(CBurningVideoDriver* driver)
634{
635 #ifdef _IRR_COMPILE_WITH_BURNINGSVIDEO_
636 return new CTRTextureGouraudNoZ2( driver );
637 #else
638 return 0;
639 #endif // _IRR_COMPILE_WITH_BURNINGSVIDEO_
640}
641
642
643} // end namespace video
644} // end namespace irr
645
646
647
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