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authorDavid Walter Seikel2016-03-28 22:28:34 +1000
committerDavid Walter Seikel2016-03-28 22:28:34 +1000
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Move Irrlicht to src/others.
Diffstat (limited to 'src/others/irrlicht-1.8.1/source/Irrlicht/CTRTextureDetailMap2.cpp')
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diff --git a/src/others/irrlicht-1.8.1/source/Irrlicht/CTRTextureDetailMap2.cpp b/src/others/irrlicht-1.8.1/source/Irrlicht/CTRTextureDetailMap2.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#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
54#if !defined ( SOFTWARE_DRIVER_2_USE_WBUFFER ) && defined ( USE_ZBUFFER )
55 #ifndef SOFTWARE_DRIVER_2_PERSPECTIVE_CORRECT
56 #undef IPOL_W
57 #endif
58 #define IPOL_Z
59
60 #ifdef CMP_W
61 #undef CMP_W
62 #define CMP_Z
63 #endif
64
65 #ifdef WRITE_W
66 #undef WRITE_W
67 #define WRITE_Z
68 #endif
69
70#endif
71
72
73namespace irr
74{
75
76namespace video
77{
78
79class CTRTextureDetailMap2 : public IBurningShader
80{
81public:
82
83 //! constructor
84 CTRTextureDetailMap2(CBurningVideoDriver* driver);
85
86 //! draws an indexed triangle list
87 virtual void drawTriangle ( const s4DVertex *a,const s4DVertex *b,const s4DVertex *c );
88
89
90private:
91 void scanline_bilinear ();
92 sScanConvertData scan;
93 sScanLineData line;
94
95};
96
97//! constructor
98CTRTextureDetailMap2::CTRTextureDetailMap2(CBurningVideoDriver* driver)
99: IBurningShader(driver)
100{
101 #ifdef _DEBUG
102 setDebugName("CTRTextureDetailMap2");
103 #endif
104}
105
106
107
108/*!
109*/
110void CTRTextureDetailMap2::scanline_bilinear ()
111{
112 tVideoSample *dst;
113
114#ifdef USE_ZBUFFER
115 fp24 *z;
116#endif
117
118 s32 xStart;
119 s32 xEnd;
120 s32 dx;
121
122
123#ifdef SUBTEXEL
124 f32 subPixel;
125#endif
126
127#ifdef IPOL_Z
128 f32 slopeZ;
129#endif
130#ifdef IPOL_W
131 fp24 slopeW;
132#endif
133#ifdef IPOL_C0
134 sVec4 slopeC;
135#endif
136#ifdef IPOL_T0
137 sVec2 slopeT[BURNING_MATERIAL_MAX_TEXTURES];
138#endif
139
140 // apply top-left fill-convention, left
141 xStart = core::ceil32( line.x[0] );
142 xEnd = core::ceil32( line.x[1] ) - 1;
143
144 dx = xEnd - xStart;
145
146 if ( dx < 0 )
147 return;
148
149 // slopes
150 const f32 invDeltaX = core::reciprocal_approxim ( line.x[1] - line.x[0] );
151
152#ifdef IPOL_Z
153 slopeZ = (line.z[1] - line.z[0]) * invDeltaX;
154#endif
155#ifdef IPOL_W
156 slopeW = (line.w[1] - line.w[0]) * invDeltaX;
157#endif
158#ifdef IPOL_C0
159 slopeC = (line.c[0][1] - line.c[0][0]) * invDeltaX;
160#endif
161#ifdef IPOL_T0
162 slopeT[0] = (line.t[0][1] - line.t[0][0]) * invDeltaX;
163#endif
164#ifdef IPOL_T1
165 slopeT[1] = (line.t[1][1] - line.t[1][0]) * invDeltaX;
166#endif
167
168#ifdef SUBTEXEL
169 subPixel = ( (f32) xStart ) - line.x[0];
170#ifdef IPOL_Z
171 line.z[0] += slopeZ * subPixel;
172#endif
173#ifdef IPOL_W
174 line.w[0] += slopeW * subPixel;
175#endif
176#ifdef IPOL_C0
177 line.c[0][0] += slopeC * subPixel;
178#endif
179#ifdef IPOL_T0
180 line.t[0][0] += slopeT[0] * subPixel;
181#endif
182#ifdef IPOL_T1
183 line.t[1][0] += slopeT[1] * subPixel;
184#endif
185#endif
186
187 dst = (tVideoSample*)RenderTarget->lock() + ( line.y * RenderTarget->getDimension().Width ) + xStart;
188
189#ifdef USE_ZBUFFER
190 z = (fp24*) DepthBuffer->lock() + ( line.y * RenderTarget->getDimension().Width ) + xStart;
191#endif
192
193
194#ifdef INVERSE_W
195 f32 inversew;
196#endif
197
198 tFixPoint tx0, tx1;
199 tFixPoint ty0, ty1;
200
201 tFixPoint r0, g0, b0;
202 tFixPoint r1, g1, b1;
203 tFixPoint r2, g2, b2;
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 tx1 = tofix ( line.t[1][0].x,inversew);
222 ty1 = tofix ( line.t[1][0].y,inversew);
223
224#else
225 tx0 = tofix ( line.t[0][0].x );
226 ty0 = tofix ( line.t[0][0].y );
227 tx1 = tofix ( line.t[1][0].x );
228 ty1 = tofix ( line.t[1][0].y );
229#endif
230 getSample_texture ( r0, g0, b0, &IT[0], tx0,ty0 );
231 getSample_texture ( r1, g1, b1, &IT[1], tx1,ty1 );
232
233 // bias half color
234 r1 += -FIX_POINT_HALF_COLOR;
235 g1 += -FIX_POINT_HALF_COLOR;
236 b1 += -FIX_POINT_HALF_COLOR;
237
238 r2 = clampfix_mincolor ( clampfix_maxcolor ( r0 + r1 ) );
239 g2 = clampfix_mincolor ( clampfix_maxcolor ( g0 + g1 ) );
240 b2 = clampfix_mincolor ( clampfix_maxcolor ( b0 + b1 ) );
241
242 dst[i] = fix_to_color ( r2, g2, b2 );
243
244#ifdef WRITE_Z
245 z[i] = line.z[0];
246#endif
247#ifdef WRITE_W
248 z[i] = line.w[0];
249#endif
250
251 }
252
253#ifdef IPOL_Z
254 line.z[0] += slopeZ;
255#endif
256#ifdef IPOL_W
257 line.w[0] += slopeW;
258#endif
259#ifdef IPOL_C0
260 line.c[0][0] += slopeC;
261#endif
262#ifdef IPOL_T0
263 line.t[0][0] += slopeT[0];
264#endif
265#ifdef IPOL_T1
266 line.t[1][0] += slopeT[1];
267#endif
268 }
269
270}
271
272void CTRTextureDetailMap2::drawTriangle ( const s4DVertex *a,const s4DVertex *b,const s4DVertex *c )
273{
274 // sort on height, y
275 if ( F32_A_GREATER_B ( a->Pos.y , b->Pos.y ) ) swapVertexPointer(&a, &b);
276 if ( F32_A_GREATER_B ( b->Pos.y , c->Pos.y ) ) swapVertexPointer(&b, &c);
277 if ( F32_A_GREATER_B ( a->Pos.y , b->Pos.y ) ) swapVertexPointer(&a, &b);
278
279 const f32 ca = c->Pos.y - a->Pos.y;
280 const f32 ba = b->Pos.y - a->Pos.y;
281 const f32 cb = c->Pos.y - b->Pos.y;
282 // calculate delta y of the edges
283 scan.invDeltaY[0] = core::reciprocal( ca );
284 scan.invDeltaY[1] = core::reciprocal( ba );
285 scan.invDeltaY[2] = core::reciprocal( cb );
286
287 if ( F32_LOWER_EQUAL_0 ( scan.invDeltaY[0] ) )
288 return;
289
290 // find if the major edge is left or right aligned
291 f32 temp[4];
292
293 temp[0] = a->Pos.x - c->Pos.x;
294 temp[1] = -ca;
295 temp[2] = b->Pos.x - a->Pos.x;
296 temp[3] = ba;
297
298 scan.left = ( temp[0] * temp[3] - temp[1] * temp[2] ) > 0.f ? 0 : 1;
299 scan.right = 1 - scan.left;
300
301 // calculate slopes for the major edge
302 scan.slopeX[0] = (c->Pos.x - a->Pos.x) * scan.invDeltaY[0];
303 scan.x[0] = a->Pos.x;
304
305#ifdef IPOL_Z
306 scan.slopeZ[0] = (c->Pos.z - a->Pos.z) * scan.invDeltaY[0];
307 scan.z[0] = a->Pos.z;
308#endif
309
310#ifdef IPOL_W
311 scan.slopeW[0] = (c->Pos.w - a->Pos.w) * scan.invDeltaY[0];
312 scan.w[0] = a->Pos.w;
313#endif
314
315#ifdef IPOL_C0
316 scan.slopeC[0][0] = (c->Color[0] - a->Color[0]) * scan.invDeltaY[0];
317 scan.c[0][0] = a->Color[0];
318#endif
319
320#ifdef IPOL_T0
321 scan.slopeT[0][0] = (c->Tex[0] - a->Tex[0]) * scan.invDeltaY[0];
322 scan.t[0][0] = a->Tex[0];
323#endif
324
325#ifdef IPOL_T1
326 scan.slopeT[1][0] = (c->Tex[1] - a->Tex[1]) * scan.invDeltaY[0];
327 scan.t[1][0] = a->Tex[1];
328#endif
329
330 // top left fill convention y run
331 s32 yStart;
332 s32 yEnd;
333
334#ifdef SUBTEXEL
335 f32 subPixel;
336#endif
337
338 // rasterize upper sub-triangle
339 if ( (f32) 0.0 != scan.invDeltaY[1] )
340 {
341 // calculate slopes for top edge
342 scan.slopeX[1] = (b->Pos.x - a->Pos.x) * scan.invDeltaY[1];
343 scan.x[1] = a->Pos.x;
344
345#ifdef IPOL_Z
346 scan.slopeZ[1] = (b->Pos.z - a->Pos.z) * scan.invDeltaY[1];
347 scan.z[1] = a->Pos.z;
348#endif
349
350#ifdef IPOL_W
351 scan.slopeW[1] = (b->Pos.w - a->Pos.w) * scan.invDeltaY[1];
352 scan.w[1] = a->Pos.w;
353#endif
354
355#ifdef IPOL_C0
356 scan.slopeC[0][1] = (b->Color[0] - a->Color[0]) * scan.invDeltaY[1];
357 scan.c[0][1] = a->Color[0];
358#endif
359
360#ifdef IPOL_T0
361 scan.slopeT[0][1] = (b->Tex[0] - a->Tex[0]) * scan.invDeltaY[1];
362 scan.t[0][1] = a->Tex[0];
363#endif
364
365#ifdef IPOL_T1
366 scan.slopeT[1][1] = (b->Tex[1] - a->Tex[1]) * scan.invDeltaY[1];
367 scan.t[1][1] = a->Tex[1];
368#endif
369
370 // apply top-left fill convention, top part
371 yStart = core::ceil32( a->Pos.y );
372 yEnd = core::ceil32( b->Pos.y ) - 1;
373
374#ifdef SUBTEXEL
375 subPixel = ( (f32) yStart ) - a->Pos.y;
376
377 // correct to pixel center
378 scan.x[0] += scan.slopeX[0] * subPixel;
379 scan.x[1] += scan.slopeX[1] * subPixel;
380
381#ifdef IPOL_Z
382 scan.z[0] += scan.slopeZ[0] * subPixel;
383 scan.z[1] += scan.slopeZ[1] * subPixel;
384#endif
385
386#ifdef IPOL_W
387 scan.w[0] += scan.slopeW[0] * subPixel;
388 scan.w[1] += scan.slopeW[1] * subPixel;
389#endif
390
391#ifdef IPOL_C0
392 scan.c[0][0] += scan.slopeC[0][0] * subPixel;
393 scan.c[0][1] += scan.slopeC[0][1] * subPixel;
394#endif
395
396#ifdef IPOL_T0
397 scan.t[0][0] += scan.slopeT[0][0] * subPixel;
398 scan.t[0][1] += scan.slopeT[0][1] * subPixel;
399#endif
400
401#ifdef IPOL_T1
402 scan.t[1][0] += scan.slopeT[1][0] * subPixel;
403 scan.t[1][1] += scan.slopeT[1][1] * subPixel;
404#endif
405
406#endif
407
408 // rasterize the edge scanlines
409 for( line.y = yStart; line.y <= yEnd; ++line.y)
410 {
411 line.x[scan.left] = scan.x[0];
412 line.x[scan.right] = scan.x[1];
413
414#ifdef IPOL_Z
415 line.z[scan.left] = scan.z[0];
416 line.z[scan.right] = scan.z[1];
417#endif
418
419#ifdef IPOL_W
420 line.w[scan.left] = scan.w[0];
421 line.w[scan.right] = scan.w[1];
422#endif
423
424#ifdef IPOL_C0
425 line.c[0][scan.left] = scan.c[0][0];
426 line.c[0][scan.right] = scan.c[0][1];
427#endif
428
429#ifdef IPOL_T0
430 line.t[0][scan.left] = scan.t[0][0];
431 line.t[0][scan.right] = scan.t[0][1];
432#endif
433
434#ifdef IPOL_T1
435 line.t[1][scan.left] = scan.t[1][0];
436 line.t[1][scan.right] = scan.t[1][1];
437#endif
438
439 // render a scanline
440 scanline_bilinear ();
441
442 scan.x[0] += scan.slopeX[0];
443 scan.x[1] += scan.slopeX[1];
444
445#ifdef IPOL_Z
446 scan.z[0] += scan.slopeZ[0];
447 scan.z[1] += scan.slopeZ[1];
448#endif
449
450#ifdef IPOL_W
451 scan.w[0] += scan.slopeW[0];
452 scan.w[1] += scan.slopeW[1];
453#endif
454
455#ifdef IPOL_C0
456 scan.c[0][0] += scan.slopeC[0][0];
457 scan.c[0][1] += scan.slopeC[0][1];
458#endif
459
460#ifdef IPOL_T0
461 scan.t[0][0] += scan.slopeT[0][0];
462 scan.t[0][1] += scan.slopeT[0][1];
463#endif
464
465#ifdef IPOL_T1
466 scan.t[1][0] += scan.slopeT[1][0];
467 scan.t[1][1] += scan.slopeT[1][1];
468#endif
469
470 }
471 }
472
473 // rasterize lower sub-triangle
474 if ( (f32) 0.0 != scan.invDeltaY[2] )
475 {
476 // advance to middle point
477 if( (f32) 0.0 != scan.invDeltaY[1] )
478 {
479 temp[0] = b->Pos.y - a->Pos.y; // dy
480
481 scan.x[0] = a->Pos.x + scan.slopeX[0] * temp[0];
482#ifdef IPOL_Z
483 scan.z[0] = a->Pos.z + scan.slopeZ[0] * temp[0];
484#endif
485#ifdef IPOL_W
486 scan.w[0] = a->Pos.w + scan.slopeW[0] * temp[0];
487#endif
488#ifdef IPOL_C0
489 scan.c[0][0] = a->Color[0] + scan.slopeC[0][0] * temp[0];
490#endif
491#ifdef IPOL_T0
492 scan.t[0][0] = a->Tex[0] + scan.slopeT[0][0] * temp[0];
493#endif
494#ifdef IPOL_T1
495 scan.t[1][0] = a->Tex[1] + scan.slopeT[1][0] * temp[0];
496#endif
497
498 }
499
500 // calculate slopes for bottom edge
501 scan.slopeX[1] = (c->Pos.x - b->Pos.x) * scan.invDeltaY[2];
502 scan.x[1] = b->Pos.x;
503
504#ifdef IPOL_Z
505 scan.slopeZ[1] = (c->Pos.z - b->Pos.z) * scan.invDeltaY[2];
506 scan.z[1] = b->Pos.z;
507#endif
508
509#ifdef IPOL_W
510 scan.slopeW[1] = (c->Pos.w - b->Pos.w) * scan.invDeltaY[2];
511 scan.w[1] = b->Pos.w;
512#endif
513
514#ifdef IPOL_C0
515 scan.slopeC[0][1] = (c->Color[0] - b->Color[0]) * scan.invDeltaY[2];
516 scan.c[0][1] = b->Color[0];
517#endif
518
519#ifdef IPOL_T0
520 scan.slopeT[0][1] = (c->Tex[0] - b->Tex[0]) * scan.invDeltaY[2];
521 scan.t[0][1] = b->Tex[0];
522#endif
523
524#ifdef IPOL_T1
525 scan.slopeT[1][1] = (c->Tex[1] - b->Tex[1]) * scan.invDeltaY[2];
526 scan.t[1][1] = b->Tex[1];
527#endif
528
529 // apply top-left fill convention, top part
530 yStart = core::ceil32( b->Pos.y );
531 yEnd = core::ceil32( c->Pos.y ) - 1;
532
533#ifdef SUBTEXEL
534
535 subPixel = ( (f32) yStart ) - b->Pos.y;
536
537 // correct to pixel center
538 scan.x[0] += scan.slopeX[0] * subPixel;
539 scan.x[1] += scan.slopeX[1] * subPixel;
540
541#ifdef IPOL_Z
542 scan.z[0] += scan.slopeZ[0] * subPixel;
543 scan.z[1] += scan.slopeZ[1] * subPixel;
544#endif
545
546#ifdef IPOL_W
547 scan.w[0] += scan.slopeW[0] * subPixel;
548 scan.w[1] += scan.slopeW[1] * subPixel;
549#endif
550
551#ifdef IPOL_C0
552 scan.c[0][0] += scan.slopeC[0][0] * subPixel;
553 scan.c[0][1] += scan.slopeC[0][1] * subPixel;
554#endif
555
556#ifdef IPOL_T0
557 scan.t[0][0] += scan.slopeT[0][0] * subPixel;
558 scan.t[0][1] += scan.slopeT[0][1] * subPixel;
559#endif
560
561#ifdef IPOL_T1
562 scan.t[1][0] += scan.slopeT[1][0] * subPixel;
563 scan.t[1][1] += scan.slopeT[1][1] * subPixel;
564#endif
565
566#endif
567
568 // rasterize the edge scanlines
569 for( line.y = yStart; line.y <= yEnd; ++line.y)
570 {
571 line.x[scan.left] = scan.x[0];
572 line.x[scan.right] = scan.x[1];
573
574#ifdef IPOL_Z
575 line.z[scan.left] = scan.z[0];
576 line.z[scan.right] = scan.z[1];
577#endif
578
579#ifdef IPOL_W
580 line.w[scan.left] = scan.w[0];
581 line.w[scan.right] = scan.w[1];
582#endif
583
584#ifdef IPOL_C0
585 line.c[0][scan.left] = scan.c[0][0];
586 line.c[0][scan.right] = scan.c[0][1];
587#endif
588
589#ifdef IPOL_T0
590 line.t[0][scan.left] = scan.t[0][0];
591 line.t[0][scan.right] = scan.t[0][1];
592#endif
593
594#ifdef IPOL_T1
595 line.t[1][scan.left] = scan.t[1][0];
596 line.t[1][scan.right] = scan.t[1][1];
597#endif
598
599 // render a scanline
600 scanline_bilinear ();
601
602 scan.x[0] += scan.slopeX[0];
603 scan.x[1] += scan.slopeX[1];
604
605#ifdef IPOL_Z
606 scan.z[0] += scan.slopeZ[0];
607 scan.z[1] += scan.slopeZ[1];
608#endif
609
610#ifdef IPOL_W
611 scan.w[0] += scan.slopeW[0];
612 scan.w[1] += scan.slopeW[1];
613#endif
614
615#ifdef IPOL_C0
616 scan.c[0][0] += scan.slopeC[0][0];
617 scan.c[0][1] += scan.slopeC[0][1];
618#endif
619
620#ifdef IPOL_T0
621 scan.t[0][0] += scan.slopeT[0][0];
622 scan.t[0][1] += scan.slopeT[0][1];
623#endif
624
625#ifdef IPOL_T1
626 scan.t[1][0] += scan.slopeT[1][0];
627 scan.t[1][1] += scan.slopeT[1][1];
628#endif
629
630 }
631 }
632
633}
634
635} // end namespace video
636} // end namespace irr
637
638#endif // _IRR_COMPILE_WITH_BURNINGSVIDEO_
639
640namespace irr
641{
642namespace video
643{
644
645//! creates a flat triangle renderer
646IBurningShader* createTriangleRendererTextureDetailMap2(CBurningVideoDriver* driver)
647{
648 #ifdef _IRR_COMPILE_WITH_BURNINGSVIDEO_
649 return new CTRTextureDetailMap2(driver);
650 #else
651 return 0;
652 #endif // _IRR_COMPILE_WITH_BURNINGSVIDEO_
653}
654
655
656} // end namespace video
657} // end namespace irr
658
659
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