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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#define SUBTEXEL
29#define INVERSE_W
30
31#define USE_ZBUFFER
32#define IPOL_W
33#define CMP_W
34#define WRITE_W
35
36//#define IPOL_C0
37#define IPOL_T0
38#define IPOL_T1
39
40// apply global override
41#ifndef SOFTWARE_DRIVER_2_PERSPECTIVE_CORRECT
42 #undef INVERSE_W
43#endif
44
45#ifndef SOFTWARE_DRIVER_2_SUBTEXEL
46 #undef SUBTEXEL
47#endif
48
49#ifndef SOFTWARE_DRIVER_2_USE_VERTEX_COLOR
50 #undef IPOL_C0
51#endif
52
53#if !defined ( SOFTWARE_DRIVER_2_USE_WBUFFER ) && defined ( USE_ZBUFFER )
54 #ifndef SOFTWARE_DRIVER_2_PERSPECTIVE_CORRECT
55 #undef IPOL_W
56 #endif
57 #define IPOL_Z
58
59 #ifdef CMP_W
60 #undef CMP_W
61 #define CMP_Z
62 #endif
63
64 #ifdef WRITE_W
65 #undef WRITE_W
66 #define WRITE_Z
67 #endif
68
69#endif
70
71namespace irr
72{
73
74namespace video
75{
76
77class CTRTextureLightMap2_M1 : public IBurningShader
78{
79public:
80
81 //! constructor
82 CTRTextureLightMap2_M1(CBurningVideoDriver* driver);
83
84 //! draws an indexed triangle list
85 virtual void drawTriangle ( const s4DVertex *a,const s4DVertex *b,const s4DVertex *c );
86
87
88private:
89 void scanline_bilinear2 ();
90
91 sScanLineData line;
92
93};
94
95//! constructor
96CTRTextureLightMap2_M1::CTRTextureLightMap2_M1(CBurningVideoDriver* driver)
97: IBurningShader(driver)
98{
99 #ifdef _DEBUG
100 setDebugName("CTRTextureLightMap2_M1");
101 #endif
102}
103
104/*!
105*/
106REALINLINE void CTRTextureLightMap2_M1::scanline_bilinear2 ()
107{
108 tVideoSample *dst;
109 fp24 *z;
110
111 s32 xStart;
112 s32 xEnd;
113 s32 dx;
114 s32 i;
115
116
117 // apply top-left fill-convention, left
118 xStart = core::ceil32( line.x[0] );
119 xEnd = core::ceil32( line.x[1] ) - 1;
120
121 dx = xEnd - xStart;
122 if ( dx < 0 )
123 return;
124
125 // slopes
126 const f32 invDeltaX = core::reciprocal_approxim ( line.x[1] - line.x[0] );
127
128 // search z-buffer for first not occulled pixel
129 z = (fp24*) DepthBuffer->lock() + ( line.y * RenderTarget->getDimension().Width ) + xStart;
130
131 // subTexel
132 const f32 subPixel = ( (f32) xStart ) - line.x[0];
133
134#ifdef IPOL_W
135 const f32 b = (line.w[1] - line.w[0]) * invDeltaX;
136 f32 a = line.w[0] + ( b * subPixel );
137
138 i = 0;
139
140 while ( a <= z[i] )
141 {
142 a += b;
143
144 i += 1;
145 if ( i > dx )
146 return;
147
148 }
149
150 // lazy setup rest of scanline
151
152 line.w[0] = a;
153 line.w[1] = b;
154#else
155 const f32 b = (line.z[1] - line.z[0]) * invDeltaX;
156 f32 a = line.z[0] + ( b * subPixel );
157
158 i = 0;
159
160 while ( a > z[i] )
161 {
162 a += b;
163
164 i += 1;
165 if ( i > dx )
166 return;
167
168 }
169
170 // lazy setup rest of scanline
171
172 line.z[0] = a;
173 line.z[1] = b;
174#endif
175 dst = (tVideoSample*)RenderTarget->lock() + ( line.y * RenderTarget->getDimension().Width ) + xStart;
176
177 a = (f32) i + subPixel;
178
179 line.t[0][1] = (line.t[0][1] - line.t[0][0]) * invDeltaX;
180 line.t[1][1] = (line.t[1][1] - line.t[1][0]) * invDeltaX;
181
182 line.t[0][0] += line.t[0][1] * a;
183 line.t[1][0] += line.t[1][1] * a;
184
185
186#ifdef BURNINGVIDEO_RENDERER_FAST
187 u32 dIndex = ( line.y & 3 ) << 2;
188
189 tFixPoint r0, g0, b0;
190 tFixPoint r1, g1, b1;
191
192#else
193 //
194 tFixPoint r0, g0, b0;
195 tFixPoint r1, g1, b1;
196#endif
197
198
199 for ( ;i <= dx; i++ )
200 {
201#ifdef IPOL_W
202 if ( line.w[0] >= z[i] )
203 {
204 z[i] = line.w[0];
205#else
206 if ( line.z[0] < z[i] )
207 {
208 z[i] = line.z[0];
209#endif
210
211#ifdef SOFTWARE_DRIVER_2_PERSPECTIVE_CORRECT
212 f32 inversew = fix_inverse32 ( line.w[0] );
213#else
214 f32 inversew = FIX_POINT_F32_MUL;
215#endif
216
217
218
219#ifdef BURNINGVIDEO_RENDERER_FAST
220
221 const tFixPointu d = dithermask [ dIndex | ( i ) & 3 ];
222
223 getSample_texture ( r0, g0, b0, &IT[0], d + tofix ( line.t[0][0].x,inversew), d + tofix ( line.t[0][0].y,inversew) );
224 getSample_texture ( r1, g1, b1, &IT[1], d + tofix ( line.t[1][0].x,inversew), d + tofix ( line.t[1][0].y,inversew) );
225#else
226 getSample_texture ( r0, g0, b0, &IT[0], tofix ( line.t[0][0].x,inversew), tofix ( line.t[0][0].y,inversew) );
227 getSample_texture ( r1, g1, b1, &IT[1], tofix ( line.t[1][0].x,inversew), tofix ( line.t[1][0].y,inversew) );
228
229#endif
230
231 dst[i] = fix_to_color ( imulFix_tex1 ( r0, r1 ),
232 imulFix_tex1 ( g0, g1 ),
233 imulFix_tex1 ( b0, b1 )
234 );
235 }
236
237#ifdef IPOL_W
238 line.w[0] += line.w[1];
239#else
240 line.z[0] += line.z[1];
241#endif
242 line.t[0][0] += line.t[0][1];
243 line.t[1][0] += line.t[1][1];
244 }
245
246}
247
248
249
250void CTRTextureLightMap2_M1::drawTriangle ( const s4DVertex *a,const s4DVertex *b,const s4DVertex *c )
251{
252 sScanConvertData scan;
253
254 // sort on height, y
255 if ( F32_A_GREATER_B ( a->Pos.y , b->Pos.y ) ) swapVertexPointer(&a, &b);
256 if ( F32_A_GREATER_B ( b->Pos.y , c->Pos.y ) ) swapVertexPointer(&b, &c);
257 if ( F32_A_GREATER_B ( a->Pos.y , b->Pos.y ) ) swapVertexPointer(&a, &b);
258
259 const f32 ca = c->Pos.y - a->Pos.y;
260 const f32 ba = b->Pos.y - a->Pos.y;
261 const f32 cb = c->Pos.y - b->Pos.y;
262 // calculate delta y of the edges
263 scan.invDeltaY[0] = core::reciprocal( ca );
264 scan.invDeltaY[1] = core::reciprocal( ba );
265 scan.invDeltaY[2] = core::reciprocal( cb );
266
267 if ( F32_LOWER_EQUAL_0 ( scan.invDeltaY[0] ) )
268 return;
269
270 // find if the major edge is left or right aligned
271 f32 temp[4];
272
273 temp[0] = a->Pos.x - c->Pos.x;
274 temp[1] = -ca;
275 temp[2] = b->Pos.x - a->Pos.x;
276 temp[3] = ba;
277
278 scan.left = ( temp[0] * temp[3] - temp[1] * temp[2] ) > 0.f ? 0 : 1;
279 scan.right = 1 - scan.left;
280
281 // calculate slopes for the major edge
282 scan.slopeX[0] = (c->Pos.x - a->Pos.x) * scan.invDeltaY[0];
283 scan.x[0] = a->Pos.x;
284
285#ifdef IPOL_Z
286 scan.slopeZ[0] = (c->Pos.z - a->Pos.z) * scan.invDeltaY[0];
287 scan.z[0] = a->Pos.z;
288#endif
289
290#ifdef IPOL_W
291 scan.slopeW[0] = (c->Pos.w - a->Pos.w) * scan.invDeltaY[0];
292 scan.w[0] = a->Pos.w;
293#endif
294
295#ifdef IPOL_C0
296 scan.slopeC[0] = (c->Color[0] - a->Color[0]) * scan.invDeltaY[0];
297 scan.c[0] = a->Color[0];
298#endif
299
300#ifdef IPOL_T0
301 scan.slopeT[0][0] = (c->Tex[0] - a->Tex[0]) * scan.invDeltaY[0];
302 scan.t[0][0] = a->Tex[0];
303#endif
304
305#ifdef IPOL_T1
306 scan.slopeT[1][0] = (c->Tex[1] - a->Tex[1]) * scan.invDeltaY[0];
307 scan.t[1][0] = a->Tex[1];
308#endif
309
310 // top left fill convention y run
311 s32 yStart;
312 s32 yEnd;
313
314#ifdef SUBTEXEL
315 f32 subPixel;
316#endif
317
318 // rasterize upper sub-triangle
319 if ( F32_GREATER_0 ( scan.invDeltaY[1] ) )
320 {
321 // calculate slopes for top edge
322 scan.slopeX[1] = (b->Pos.x - a->Pos.x) * scan.invDeltaY[1];
323 scan.x[1] = a->Pos.x;
324
325#ifdef IPOL_Z
326 scan.slopeZ[1] = (b->Pos.z - a->Pos.z) * scan.invDeltaY[1];
327 scan.z[1] = a->Pos.z;
328#endif
329
330#ifdef IPOL_W
331 scan.slopeW[1] = (b->Pos.w - a->Pos.w) * scan.invDeltaY[1];
332 scan.w[1] = a->Pos.w;
333#endif
334
335#ifdef IPOL_C0
336 scan.slopeC[1] = (b->Color[0] - a->Color[0]) * scan.invDeltaY[1];
337 scan.c[1] = a->Color[0];
338#endif
339
340#ifdef IPOL_T0
341 scan.slopeT[0][1] = (b->Tex[0] - a->Tex[0]) * scan.invDeltaY[1];
342 scan.t[0][1] = a->Tex[0];
343#endif
344
345#ifdef IPOL_T1
346 scan.slopeT[1][1] = (b->Tex[1] - a->Tex[1]) * scan.invDeltaY[1];
347 scan.t[1][1] = a->Tex[1];
348#endif
349
350 // apply top-left fill convention, top part
351 yStart = core::ceil32( a->Pos.y );
352 yEnd = core::ceil32( b->Pos.y ) - 1;
353
354#ifdef SUBTEXEL
355 subPixel = ( (f32) yStart ) - a->Pos.y;
356
357 // correct to pixel center
358 scan.x[0] += scan.slopeX[0] * subPixel;
359 scan.x[1] += scan.slopeX[1] * subPixel;
360
361#ifdef IPOL_Z
362 scan.z[0] += scan.slopeZ[0] * subPixel;
363 scan.z[1] += scan.slopeZ[1] * subPixel;
364#endif
365
366#ifdef IPOL_W
367 scan.w[0] += scan.slopeW[0] * subPixel;
368 scan.w[1] += scan.slopeW[1] * subPixel;
369#endif
370
371#ifdef IPOL_C0
372 scan.c[0] += scan.slopeC[0] * subPixel;
373 scan.c[1] += scan.slopeC[1] * subPixel;
374#endif
375
376#ifdef IPOL_T0
377 scan.t[0][0] += scan.slopeT[0][0] * subPixel;
378 scan.t[0][1] += scan.slopeT[0][1] * subPixel;
379#endif
380
381#ifdef IPOL_T1
382 scan.t[1][0] += scan.slopeT[1][0] * subPixel;
383 scan.t[1][1] += scan.slopeT[1][1] * subPixel;
384#endif
385
386#endif
387
388 // rasterize the edge scanlines
389 for( line.y = yStart; line.y <= yEnd; ++line.y)
390 {
391 line.x[scan.left] = scan.x[0];
392 line.x[scan.right] = scan.x[1];
393
394#ifdef IPOL_Z
395 line.z[scan.left] = scan.z[0];
396 line.z[scan.right] = scan.z[1];
397#endif
398
399#ifdef IPOL_W
400 line.w[scan.left] = scan.w[0];
401 line.w[scan.right] = scan.w[1];
402#endif
403
404#ifdef IPOL_C0
405 line.c[scan.left] = scan.c[0];
406 line.c[scan.right] = scan.c[1];
407#endif
408
409#ifdef IPOL_T0
410 line.t[0][scan.left] = scan.t[0][0];
411 line.t[0][scan.right] = scan.t[0][1];
412#endif
413
414#ifdef IPOL_T1
415 line.t[1][scan.left] = scan.t[1][0];
416 line.t[1][scan.right] = scan.t[1][1];
417#endif
418
419 // render a scanline
420 scanline_bilinear2 ();
421
422 scan.x[0] += scan.slopeX[0];
423 scan.x[1] += scan.slopeX[1];
424
425#ifdef IPOL_Z
426 scan.z[0] += scan.slopeZ[0];
427 scan.z[1] += scan.slopeZ[1];
428#endif
429
430#ifdef IPOL_W
431 scan.w[0] += scan.slopeW[0];
432 scan.w[1] += scan.slopeW[1];
433#endif
434
435#ifdef IPOL_C0
436 scan.c[0] += scan.slopeC[0];
437 scan.c[1] += scan.slopeC[1];
438#endif
439
440#ifdef IPOL_T0
441 scan.t[0][0] += scan.slopeT[0][0];
442 scan.t[0][1] += scan.slopeT[0][1];
443#endif
444
445#ifdef IPOL_T1
446 scan.t[1][0] += scan.slopeT[1][0];
447 scan.t[1][1] += scan.slopeT[1][1];
448#endif
449
450 }
451 }
452
453 // rasterize lower sub-triangle
454 //if ( (f32) 0.0 != scan.invDeltaY[2] )
455 if ( F32_GREATER_0 ( scan.invDeltaY[2] ) )
456 {
457 // advance to middle point
458 if ( F32_GREATER_0 ( scan.invDeltaY[1] ) )
459 {
460 temp[0] = b->Pos.y - a->Pos.y; // dy
461
462 scan.x[0] = a->Pos.x + scan.slopeX[0] * temp[0];
463#ifdef IPOL_Z
464 scan.z[0] = a->Pos.z + scan.slopeZ[0] * temp[0];
465#endif
466#ifdef IPOL_W
467 scan.w[0] = a->Pos.w + scan.slopeW[0] * temp[0];
468#endif
469#ifdef IPOL_C0
470 scan.c[0] = a->Color[0] + scan.slopeC[0] * temp[0];
471#endif
472#ifdef IPOL_T0
473 scan.t[0][0] = a->Tex[0] + scan.slopeT[0][0] * temp[0];
474#endif
475#ifdef IPOL_T1
476 scan.t[1][0] = a->Tex[1] + scan.slopeT[1][0] * temp[0];
477#endif
478
479 }
480
481 // calculate slopes for bottom edge
482 scan.slopeX[1] = (c->Pos.x - b->Pos.x) * scan.invDeltaY[2];
483 scan.x[1] = b->Pos.x;
484
485#ifdef IPOL_Z
486 scan.slopeZ[1] = (c->Pos.z - b->Pos.z) * scan.invDeltaY[2];
487 scan.z[1] = b->Pos.z;
488#endif
489
490#ifdef IPOL_W
491 scan.slopeW[1] = (c->Pos.w - b->Pos.w) * scan.invDeltaY[2];
492 scan.w[1] = b->Pos.w;
493#endif
494
495#ifdef IPOL_C0
496 scan.slopeC[1] = (c->Color[0] - b->Color[0]) * scan.invDeltaY[2];
497 scan.c[1] = b->Color[0];
498#endif
499
500#ifdef IPOL_T0
501 scan.slopeT[0][1] = (c->Tex[0] - b->Tex[0]) * scan.invDeltaY[2];
502 scan.t[0][1] = b->Tex[0];
503#endif
504
505#ifdef IPOL_T1
506 scan.slopeT[1][1] = (c->Tex[1] - b->Tex[1]) * scan.invDeltaY[2];
507 scan.t[1][1] = b->Tex[1];
508#endif
509
510 // apply top-left fill convention, top part
511 yStart = core::ceil32( b->Pos.y );
512 yEnd = core::ceil32( c->Pos.y ) - 1;
513
514#ifdef SUBTEXEL
515
516 subPixel = ( (f32) yStart ) - b->Pos.y;
517
518 // correct to pixel center
519 scan.x[0] += scan.slopeX[0] * subPixel;
520 scan.x[1] += scan.slopeX[1] * subPixel;
521
522#ifdef IPOL_Z
523 scan.z[0] += scan.slopeZ[0] * subPixel;
524 scan.z[1] += scan.slopeZ[1] * subPixel;
525#endif
526
527#ifdef IPOL_W
528 scan.w[0] += scan.slopeW[0] * subPixel;
529 scan.w[1] += scan.slopeW[1] * subPixel;
530#endif
531
532#ifdef IPOL_C0
533 scan.c[0] += scan.slopeC[0] * subPixel;
534 scan.c[1] += scan.slopeC[1] * subPixel;
535#endif
536
537#ifdef IPOL_T0
538 scan.t[0][0] += scan.slopeT[0][0] * subPixel;
539 scan.t[0][1] += scan.slopeT[0][1] * subPixel;
540#endif
541
542#ifdef IPOL_T1
543 scan.t[1][0] += scan.slopeT[1][0] * subPixel;
544 scan.t[1][1] += scan.slopeT[1][1] * subPixel;
545#endif
546
547#endif
548
549 // rasterize the edge scanlines
550 for( line.y = yStart; line.y <= yEnd; ++line.y)
551 {
552 line.x[scan.left] = scan.x[0];
553 line.x[scan.right] = scan.x[1];
554
555#ifdef IPOL_Z
556 line.z[scan.left] = scan.z[0];
557 line.z[scan.right] = scan.z[1];
558#endif
559
560#ifdef IPOL_W
561 line.w[scan.left] = scan.w[0];
562 line.w[scan.right] = scan.w[1];
563#endif
564
565#ifdef IPOL_C0
566 line.c[scan.left] = scan.c[0];
567 line.c[scan.right] = scan.c[1];
568#endif
569
570#ifdef IPOL_T0
571 line.t[0][scan.left] = scan.t[0][0];
572 line.t[0][scan.right] = scan.t[0][1];
573#endif
574
575#ifdef IPOL_T1
576 line.t[1][scan.left] = scan.t[1][0];
577 line.t[1][scan.right] = scan.t[1][1];
578#endif
579
580 // render a scanline
581 scanline_bilinear2 ();
582
583 scan.x[0] += scan.slopeX[0];
584 scan.x[1] += scan.slopeX[1];
585
586#ifdef IPOL_Z
587 scan.z[0] += scan.slopeZ[0];
588 scan.z[1] += scan.slopeZ[1];
589#endif
590
591#ifdef IPOL_W
592 scan.w[0] += scan.slopeW[0];
593 scan.w[1] += scan.slopeW[1];
594#endif
595
596#ifdef IPOL_C0
597 scan.c[0] += scan.slopeC[0];
598 scan.c[1] += scan.slopeC[1];
599#endif
600
601#ifdef IPOL_T0
602 scan.t[0][0] += scan.slopeT[0][0];
603 scan.t[0][1] += scan.slopeT[0][1];
604#endif
605
606#ifdef IPOL_T1
607 scan.t[1][0] += scan.slopeT[1][0];
608 scan.t[1][1] += scan.slopeT[1][1];
609#endif
610
611 }
612 }
613
614}
615
616
617} // end namespace video
618} // end namespace irr
619
620#endif // _IRR_COMPILE_WITH_BURNINGSVIDEO_
621
622namespace irr
623{
624namespace video
625{
626
627
628
629//! creates a flat triangle renderer
630IBurningShader* createTriangleRendererTextureLightMap2_M1(CBurningVideoDriver* driver)
631{
632 #ifdef _IRR_COMPILE_WITH_BURNINGSVIDEO_
633 return new CTRTextureLightMap2_M1(driver);
634 #else
635 return 0;
636 #endif // _IRR_COMPILE_WITH_BURNINGSVIDEO_
637}
638
639
640} // end namespace video
641} // end namespace irr
642
643
644
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