summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/video/voodoo_render.h
blob: 038948730be1e09cf618cb20d733c097ba167862 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************

    voodoo_render.h

    3dfx Voodoo Graphics SST-1/2 emulator.

***************************************************************************/

#ifndef MAME_VIDEO_VOODOO_RENDER_H
#define MAME_VIDEO_VOODOO_RENDER_H

#pragma once

#include "video/poly.h"
#include "video/rgbutil.h"


namespace voodoo
{

// forward declarations
struct rasterizer_info;
struct poly_data;
class dither_helper;

// base class for our renderer
using voodoo_poly_manager = poly_manager<float, poly_data, 0, POLY_FLAG_NO_CLIPPING>;



//**************************************************************************
//  DITHER HELPER
//**************************************************************************

// ======================> dither_helper

// this class provides common code for querying and managing dithering
// effects, which are very particular to the Voodoo
class dither_helper
{
public:
	// constructor to pre-cache based on mode and Y coordinate
	dither_helper(int y, reg_fbz_mode const fbzmode, reg_fog_mode const fogmode = reg_fog_mode(0)) :
		m_dither_lookup(nullptr),
		m_dither_raw(nullptr),
		m_dither_raw_4x4(&s_dither_matrix_4x4[(y & 3) * 4])
	{
		// still use a lookup for no dithering since it's rare and we
		// can avoid yet another conditional on the hot path
		if (!fbzmode.enable_dithering())
			m_dither_lookup = &s_nodither_lookup[0];
		else if (fbzmode.dither_type() == 0)
		{
			m_dither_lookup = &s_dither4_lookup[(y & 3) << 11];
			m_dither_raw = &s_dither_matrix_4x4[(y & 3) * 4];
		}
		else
		{
			m_dither_lookup = &s_dither2_lookup[(y & 3) << 11];
			m_dither_raw = &s_dither_matrix_2x2[(y & 3) * 4];
		}
	}

	// apply dithering to a pixel in separate R/G/B format and assemble as 5-6-5
	u16 pixel(s32 x, s32 r, s32 g, s32 b) const
	{
		u8 const *table = &m_dither_lookup[(x & 3) << 9];
		return (table[r] << 11) | (table[g + 256] << 5) | table[b];
	}

	// apply dithering to a pixel in separate R/G/B format and assemble as 5-6-5
	u16 pixel(s32 x, rgb_t color) const
	{
		u8 const *table = &m_dither_lookup[(x & 3) << 9];
		return (table[color.r()] << 11) | (table[color.g() + 256] << 5) | table[color.b()];
	}

	// apply dithering to an rgbint_t pixel and assemble as 5-6-5
	u16 pixel(s32 x, rgbaint_t const &color) const
	{
		u8 const *table = &m_dither_lookup[(x & 3) << 9];
		return (table[color.get_r()] << 11) | (table[color.get_g() + 256] << 5) | table[color.get_b()];
	}

	// return the raw 4x4 dither pattern
	u32 raw_4x4(s32 x) const
	{
		return m_dither_raw_4x4[x & 3];
	}

	// return the subtractive dither value for alpha blending
	u32 subtract(s32 x) const
	{
		return (m_dither_raw != nullptr) ? ((15 - m_dither_raw[x & 3]) >> 1) : 0;
	}

	// allocate and initialize static tables
	static void init_static();

private:
	// hardware-verified equation for applying dither to the red/blue components
	static constexpr u8 dither_rb(u8 value, u8 dither)
	{
		return ((value << 1) - (value >> 4) + (value >> 7) + dither) >> (1+3);
	}

	// hardware-verified equation for applying dither to the green componenets
	static constexpr u8 dither_g(u8 value, u8 dither)
	{
		return ((value << 2) - (value >> 4) + (value >> 6) + dither) >> (2+2);
	}

	// internal state
	u8 const *m_dither_lookup;
	u8 const *m_dither_raw;
	u8 const *m_dither_raw_4x4;

	// static tables
	static std::unique_ptr<u8[]> s_dither4_lookup;
	static std::unique_ptr<u8[]> s_dither2_lookup;
	static std::unique_ptr<u8[]> s_nodither_lookup;
	static u8 const s_dither_matrix_4x4[4*4];
	static u8 const s_dither_matrix_2x2[4*4];
};


// ======================> color_source

// color_source describes the alpha+RGB components of a color in an
// abstract way
class color_source
{
public:
	// flags
	static constexpr u8 FLAG_INVERTED = 0x80;
	static constexpr u8 FLAG_ALPHA_EXPANDED = 0x40;

	// constant values (0-3)
	static constexpr u8 ZERO = 0;
	static constexpr u8 ONE = 1;
	static constexpr u8 COLOR0 = 2;
	static constexpr u8 COLOR1 = 3;

	// iterated values (4-7)
	static constexpr u8 ITERATED_ARGB = 4;
	static constexpr u8 CLAMPZ = 5;
	static constexpr u8 CLAMPW = 6;

	// dynamic values (8+)
	static constexpr u8 TEXEL0 = 8;
	static constexpr u8 TEXEL1 = 9;
	static constexpr u8 DETAIL_FACTOR = 10;
	static constexpr u8 LOD_FRACTION = 11;
	static constexpr u8 COLOR0_OR_ITERATED_VIA_TEXEL_ALPHA = 12;

	// constructor
	constexpr color_source(u8 alpha = ZERO, u8 rgb = ZERO) : m_alpha(alpha), m_rgb(rgb) { }

	// exact comparisons
	bool operator==(color_source const &rhs) const { return m_rgb == rhs.m_rgb && m_alpha == rhs.m_alpha; }
	bool operator!=(color_source const &rhs) const { return m_rgb != rhs.m_rgb || m_alpha != rhs.m_alpha; }

	// return the full alpha/RGB value
	u8 alpha() const { return m_alpha; }
	u8 rgb() const { return m_rgb; }

	// return the base (flag-free) alpha/RGB value
	u8 alpha_base() const { return m_alpha & 15; }
	u8 rgb_base() const { return m_rgb & 15; }

	// return the alpha/RGB value flags
	u8 alpha_flags() const { return m_alpha >> 6; }
	u8 rgb_flags() const { return m_rgb >> 6; }

	// helpers
	bool is_rgb_zero() const { return m_rgb == ZERO; }
	bool is_alpha_zero() const { return m_alpha == ZERO; }
	bool is_zero() const { return is_rgb_zero() && is_alpha_zero(); }
	bool is_rgb_one() const { return m_rgb == ONE; }
	bool is_alpha_one() const { return m_alpha == ONE; }
	bool is_one() const { return is_rgb_one() && is_alpha_one(); }

	// uniform is true if RGB and alpha come from the same source
	bool is_uniform() const { return (m_alpha == m_rgb); }

	// uniform_alpha is true if RGB and alpha are replication of the same alpha value
	bool is_uniform_alpha() const { return ((m_alpha | FLAG_ALPHA_EXPANDED) == m_rgb); }

	// constant is true if both values are constant across a scanline
	bool is_rgb_constant() const { return ((m_rgb & 0x0c) == 0x00); }
	bool is_alpha_constant() const { return ((m_alpha & 0x0c) == 0x00); }
	bool is_constant() const { return is_rgb_constant() && is_alpha_constant(); }

	// partial_constant is true if at least one value is constant across a scanline
	bool is_partial_constant() const { return is_rgb_constant() || is_alpha_constant(); }

	// constant_or_iterated is true if values are constant or simply iterated across a scanline
	bool is_rgb_constant_or_iterated() const { return ((m_rgb & 0x08) == 0x00); }
	bool is_alpha_constant_or_iterated() const { return ((m_alpha & 0x08) == 0x00); }
	bool is_constant_or_iterated() const { return is_rgb_constant_or_iterated() && is_alpha_constant_or_iterated(); }

	// uses_any is true if either the RGB or alpha referenecs the given source
	bool uses_any(color_source const &src) const { return rgb_base() == src.rgb_base() || alpha_base() == src.alpha_base(); }

	// directly set the alpha/RGB component
	void set_alpha(u8 alpha) { m_alpha = alpha; }
	void set_rgb(u8 rgb) { m_rgb = rgb; }

	// set the RGB as an expanded single component
	void set_rgb_from_alpha(u8 rgb) { m_rgb = rgb | FLAG_ALPHA_EXPANDED; }

	// mark the RGB/alpha component as inverted
	void invert_rgb() { m_rgb ^= FLAG_INVERTED; }
	void invert_alpha() { m_alpha ^= FLAG_INVERTED; }

	// perform internal simplification
	void simplify();

	// return a string version of the component
	std::string as_string() const;

	// constants
	static color_source const zero;
	static color_source const one;
	static color_source const iterated_argb;
	static color_source const color0;
	static color_source const color1;
	static color_source const texel0;
	static color_source const texel1;

private:
	// internal state
	u8 m_alpha, m_rgb;
};


// ======================> color_equation

// color_equation describes a set of 4 color sources, intended to be computed
// as clamp((color - sub) * multiply + add)
class color_equation
{
public:
	// construction
	constexpr color_equation() { }

	// simple getters
	color_source &color() { return m_color; }
	color_source &subtract() { return m_subtract; }
	color_source &multiply() { return m_multiply; }
	color_source &add() { return m_add; }

	// helpers
	bool uses_any(color_source color) const { return m_color.uses_any(color) || m_subtract.uses_any(color) || m_multiply.uses_any(color) || m_add.uses_any(color); }
	bool is_identity(color_source color) const { return (m_multiply.is_zero() && m_add == color); }
	bool is_zero() const { return m_multiply.is_zero() && m_add.is_zero(); }

	// operations
	void simplify();
	std::string as_string() const;

	// computation
	static color_equation from_fbzcp(reg_fbz_colorpath const fbzcp);
	static color_equation from_texmode(reg_texture_mode const texmode, color_source texel_color, color_source input_color);

private:
	// internal state
	color_source m_color;
	color_source m_subtract;
	color_source m_multiply;
	color_source m_add;
};


// ======================> rasterizer_params

// this class holds the representative parameters that characterize a
// specific rasterizer; these are used to index and discover one of
// the special hard-coded rasterizers in voodoo_render.cpp
class rasterizer_params
{
public:
	// generic flags
	static constexpr u32 GENERIC_TEX0 = 0x01;
	static constexpr u32 GENERIC_TEX1 = 0x02;
	static constexpr u32 GENERIC_TEX0_IDENTITY = 0x04;
	static constexpr u32 GENERIC_TEX1_IDENTITY = 0x08;

	// construction
	constexpr rasterizer_params(u32 generic = 0, u32 fbzcp = 0, u32 alphamode = 0, u32 fogmode = 0, u32 fbzmode = 0, u32 texmode0 = 0, u32 texmode1 = 0) :
		m_generic(generic),
		m_fbzcp(fbzcp),
		m_alphamode(alphamode),
		m_fogmode(fogmode),
		m_fbzmode(fbzmode),
		m_texmode0(texmode0),
		m_texmode1(texmode1) { }

	// compare everything directly
	bool operator==(rasterizer_params const &rhs) const;

	// compute the parameters given a set of registers
	void compute(voodoo_regs &regs, voodoo_regs *tmu0regs = nullptr, voodoo_regs *tmu1regs = nullptr);
	void compute_equations();

	// compute the hash of the settings
	u32 hash() const;

	// getters
	u32 generic() const { return m_generic; }
	reg_fbz_colorpath fbzcp() const { return reg_fbz_colorpath(m_fbzcp); }
	reg_alpha_mode alphamode() const { return reg_alpha_mode(m_alphamode); }
	reg_fog_mode fogmode() const { return reg_fog_mode(m_fogmode); }
	reg_fbz_mode fbzmode() const { return reg_fbz_mode(m_fbzmode); }
	reg_texture_mode texmode0() const { return reg_texture_mode(m_texmode0); }
	reg_texture_mode texmode1() const { return reg_texture_mode(m_texmode1); }
	color_equation const &colorpath_equation() const { return m_color_equation; }
	color_equation const &tex0_equation() const { return m_tex0_equation; }
	color_equation const &tex1_equation() const { return m_tex1_equation; }

private:
	// internal state
	u32 m_generic;      // 4 bits
	u32 m_fbzcp;        // 30 bits
	u32 m_alphamode;    // 32 bits
	u32 m_fogmode;      // 8 bits
	u32 m_fbzmode;      // 22 bits
	u32 m_texmode0;     // 31 bits
	u32 m_texmode1;     // 31 bits
	color_equation m_color_equation;
	color_equation m_tex0_equation;
	color_equation m_tex1_equation;
};


// ======================> rasterizer_texture

// this class holds TMU-specific decoded data regarding a texture; it is
// encapsulated here, with functions to derive it from register info and
// functions to process it as part of the rendering pipeline
class rasterizer_texture
{
public:
	// recompute internal values based on parameters
	void recompute(voodoo_regs const &regs, u8 *ram, u32 mask, rgb_t const *lookup, u32 addrmask, u8 addrshift);

	// look up a texel at the given coordinate
	rgb_t lookup_single_texel(u32 format, u32 texbase, s32 s, s32 t);

	// fetch a texel given coordinates and LOD information
	rgbaint_t fetch_texel(voodoo::reg_texture_mode const texmode, voodoo::dither_helper const &dither, s32 x, double iters, double itert, double iterw, s32 &lod, u8 bilinear_mask);

	// texture-specific color combination unit
	rgbaint_t combine_texture(voodoo::reg_texture_mode const texmode, rgbaint_t const &c_local, rgbaint_t const &c_other, s32 lod);

	// return a write pointer based on the LOD, s/t coordinates, and format
	u8 *write_ptr(u32 lod, u32 s, u32 t, u32 scale) const
	{
		u32 offs = t * ((m_wmask >> lod) + 1) + s;
		return m_ram + ((m_lodoffset[lod] + ((scale * offs) & ~3)) & m_mask);
	}

private:
	// internal state
	rgb_t const *m_lookup;      // currently selected lookup
	u8 *m_ram;                  // pointer to base of TMU RAM
	u8 m_wmask;                 // mask for the current texture width
	u8 m_hmask;                 // mask for the current texture height
	u8 m_detailscale;           // detail scale
	s16 m_lodmin;               // minimum LOD value
	s16 m_lodmax;               // maximum LOD value
	s16 m_lodbias;              // LOD bias
	u16 m_lodmask;              // mask of available LODs
	u32 m_mask;                 // mask to apply to pointers
	s32 m_detailmax;            // detail clamp
	s32 m_detailbias;           // detail bias
	u32 m_lodoffset[9];         // offset of texture base for each LOD
};


// ======================> rasterizer_palette

class rasterizer_palette
{
public:
	// compute from an NCC table
	void compute_ncc(u32 const *regs);

	// copy from a table
	void copy(rgb_t *texels) { memcpy(&m_texel, texels, sizeof(m_texel)); }

	// simple getters
	rgb_t const *texels() const { return &m_texel[0]; }

private:
	// internal state
	rgb_t m_texel[256];
};


// ======================> poly_data

// this struct contains the polygon-wide shared data used during rendering;
// it is captured here so that further changed can be made to the registers
// without affecting pending operations
struct poly_data
{
	rasterizer_params raster;   // normalized rasterizer parameters, for triangles
	rasterizer_info *info;      // pointer to rasterizer information
	u16 *destbase;              // destination to write
	u16 *depthbase;             // depth/aux buffer to write
	rasterizer_texture *tex0;   // texture 0 information
	rasterizer_texture *tex1;   // texture 1 information
	u16 clipleft, clipright;    // x clipping
	u16 cliptop, clipbottom;    // y clipping

	s16 ax, ay;                 // vertex A x,y (12.4)
	s32 startr, startg, startb, starta; // starting R,G,B,A (12.12)
	s32 startz;                 // starting Z (20.12)
	s64 startw;                 // starting W (16.32)
	s32 drdx, dgdx, dbdx, dadx; // delta R,G,B,A per X
	s32 dzdx;                   // delta Z per X
	s64 dwdx;                   // delta W per X
	s32 drdy, dgdy, dbdy, dady; // delta R,G,B,A per Y
	s32 dzdy;                   // delta Z per Y
	s64 dwdy;                   // delta W per Y

	s64 starts0, startt0;       // starting S,T (14.18)
	s64 startw0;                // starting W (2.30)
	s64 ds0dx, dt0dx;           // delta S,T per X
	s64 dw0dx;                  // delta W per X
	s64 ds0dy, dt0dy;           // delta S,T per Y
	s64 dw0dy;                  // delta W per Y

	s64 starts1, startt1;       // starting S,T (14.18)
	s64 startw1;                // starting W (2.30)
	s64 ds1dx, dt1dx;           // delta S,T per X
	s64 dw1dx;                  // delta W per X
	s64 ds1dy, dt1dy;           // delta S,T per Y
	s64 dw1dy;                  // delta W per Y

	rgb_t color0, color1;       // colors consumed by the rasterizer
	rgb_t chromakey;            // chromakey
	rgb_t fogcolor;             // fogcolor
	u32 zacolor;                // depth/alpha value consumed by the rasterizer
	u32 stipple;                // stipple pattern
	u32 alpharef;               // reference alpha value

	u16 dither[16];             // dither matrix, for fastfill
};


// ======================> rasterizer_info

// this struct describes a specific rasterizer
struct rasterizer_info
{
	rasterizer_info *next;      // pointer to next entry with the same hash
	voodoo_poly_manager::render_delegate callback; // callback pointer
	u8 is_generic;              // is this a generic rasterizer?
	u8 display;                 // display index, used for sorted printing
	u32 scanlines;              // how many scanlines we've used this for
	u32 polys;                  // how many polys we've used this for
	u32 fullhash;               // full 32-bit hash
	rasterizer_params params;   // full copy of the relevant parameters
};


// ======================> thread_stats_block

// this struct holds a thread-specific chunk of statistics that are combined
// on demand with other threads' data when requested
struct thread_stats_block
{
	void reset()
	{
		pixels_in = pixels_out = chroma_fail = zfunc_fail = afunc_fail = clip_fail = stipple_count = 0;
	}

	s32 pixels_in = 0;          // pixels in statistic
	s32 pixels_out = 0;         // pixels out statistic
	s32 chroma_fail = 0;        // chroma test fail statistic
	s32 zfunc_fail = 0;         // z function test fail statistic
	s32 afunc_fail = 0;         // alpha function test fail statistic
	s32 clip_fail = 0;          // clipping fail statistic
	s32 stipple_count = 0;      // stipple statistic
	s32 filler[poly_array<int,1>::CACHE_LINE_SIZE/4 - 7]; // pad this structure to cache line size
};


// ======================> voodoo_renderer

class voodoo_renderer : public voodoo_poly_manager
{
	static constexpr u32 RASTER_HASH_SIZE = 97; // size of the rasterizer hash table

public:
	using rasterizer_mfp = void (voodoo_renderer::*)(int32_t, const extent_t &, const poly_data &, int);

	// construction
	voodoo_renderer(running_machine &machine, u16 tmu_config, const rgb_t *rgb565, voodoo_regs &fbi_regs, voodoo_regs *tmu0_regs, voodoo_regs *tmu1_regs);

	// state saving
	void register_save(save_proxy &save);

	// simple getters
	s32 yorigin() const { return m_yorigin; }
	u32 rowpixels() const { return m_rowpixels; }
	u16 tmu_config() const { return m_tmu_config; }
	std::vector<thread_stats_block> &thread_stats() { return m_thread_stats; }

	// simple setters
	void set_tmu_config(u16 value) { m_tmu_config = value; }
	void set_fogdelta_mask(u8 value) { m_fogdelta_mask = value; }
	void set_bilinear_mask(u8 value) { m_bilinear_mask = value; }

	// allocate a new poly_data and fill in the rasterizer_params
	poly_data &alloc_poly();

	// enqueue operations
	u32 enqueue_fastfill(poly_data &poly);
	u32 enqueue_triangle(poly_data &poly, vertex_t const *vert);

	// core triangle rasterizer
	template<u32 GenericFlags, u32 FbzCp, u32 FbzMode, u32 AlphaMode, u32 FogMode, u32 TexMode0, u32 TexMode1>
	void rasterizer(s32 y, const voodoo::voodoo_renderer::extent_t &extent, const voodoo::poly_data &extra, int threadid);

	// run the pixel pipeline for LFB writes
	void pixel_pipeline(thread_stats_block &threadstats, u16 *dest, u16 *depth, s32 x, s32 scry, rgb_t color, u16 sz);

	// update the fog tables
	void write_fog(u32 base, u32 data)
	{
		u32 oldval = m_fogdelta[base + 0] | (m_fogblend[base + 0] << 8) | (m_fogdelta[base + 1] << 16) | (m_fogblend[base + 1] << 24);
		if (oldval != data)
		{
			wait("write_fog");
			m_fogdelta[base + 0] = BIT(data, 0, 8);
			m_fogblend[base + 0] = BIT(data, 8, 8);
			m_fogdelta[base + 1] = BIT(data, 16, 8);
			m_fogblend[base + 1] = BIT(data, 24, 8);
		}
	}

	// update the Y origin
	void set_yorigin(s32 yorigin)
	{
		if (m_yorigin != yorigin)
			wait("set_yorigin");
		m_yorigin = yorigin;
	}

	// update the rowpixels
	void set_rowpixels(u32 rowpixels)
	{
		if (m_rowpixels != rowpixels)
			wait("set_rowpixels");
		m_rowpixels = rowpixels;
	}

	// manage texture instances
	rasterizer_texture &alloc_texture(int tmu) { return m_textures.next(tmu); }
	rasterizer_texture &last_texture(int tmu) { return m_textures.last(tmu); }

	// manage ncc texel instnaces
	rasterizer_palette &alloc_palette(int which) { return m_palettes.next(which); }
	rasterizer_palette &last_palette(int which) { return m_palettes.last(which); }

	// dump rasterizer statistics if enabled
	void dump_rasterizer_stats();

private:
	// pipeline stages, in order
	bool stipple_test(thread_stats_block &threadstats, voodoo::reg_fbz_mode const fbzmode, s32 x, s32 y, u32 &stipple);
	s32 compute_depthval(voodoo::poly_data const &extra, voodoo::reg_fbz_mode const fbzmode, voodoo::reg_fbz_colorpath const fbzcp, s32 wfloat, s32 iterz);
	bool depth_test(thread_stats_block &stats, voodoo::reg_fbz_mode const fbzmode, s32 depth_dest, s32 depth_source);
	bool combine_color(rgbaint_t &color, thread_stats_block &threadstats, const voodoo::poly_data &extradata, voodoo::reg_fbz_colorpath const fbzcp, voodoo::reg_fbz_mode const fbzmode, rgbaint_t texel, s32 iterz, s64 iterw, rgb_t chromakey);
	bool alpha_mask_test(thread_stats_block &stats, u32 alpha);
	bool alpha_test(thread_stats_block &stats, voodoo::reg_alpha_mode const alphamode, u32 alpha, u32 alpharef);
	bool chroma_key_test(thread_stats_block &stats, rgbaint_t const &colorin, rgb_t chromakey);
	void apply_fogging(rgbaint_t &color, rgb_t fogcolor, u32 depthbias, voodoo::reg_fbz_mode const fbzmode, voodoo::reg_fog_mode const fogmode, voodoo::reg_fbz_colorpath const fbzcp, s32 x, voodoo::dither_helper const &dither, s32 wfloat, s32 iterz, s64 iterw, const rgbaint_t &iterargb);
	void alpha_blend(rgbaint_t &color, voodoo::reg_fbz_mode const fbzmode, voodoo::reg_alpha_mode const alphamode, s32 x, voodoo::dither_helper const &dither, int dpix, u16 *depth, rgbaint_t const &prefog);
	void write_pixel(thread_stats_block &threadstats, voodoo::reg_fbz_mode const fbzmode, voodoo::dither_helper const &dither, u16 *destbase, u16 *depthbase, s32 x, rgbaint_t const &color, s32 depthval);

	// fastfill rasterizer
	void rasterizer_fastfill(s32 scanline, const voodoo::voodoo_renderer::extent_t &extent, const voodoo::poly_data &extradata, int threadid);

	// helpers
	static rasterizer_mfp generic_rasterizer(u8 texmask);
	voodoo::rasterizer_info *add_rasterizer(voodoo::rasterizer_params const &params, rasterizer_mfp rasterizer, bool is_generic);

	// internal state
	u8 m_bilinear_mask;         // mask for bilinear resolution (0xf0 for V1, 0xff for V2)
	u16 m_tmu_config;           // TMU configuration
	u32 m_rowpixels;            // current pixels per row
	s32 m_yorigin;              // current Y origin
	voodoo_regs &m_fbi_reg;     // FBI registers
	voodoo_regs *m_tmu0_reg;    // TMU #0 registers
	voodoo_regs *m_tmu1_reg;    // TMU #1 register
	rgb_t const *m_rgb565;      // 5-6-5 to 8-8-8 lookup table
	u8 m_fogblend[64];          // 64-entry fog table
	u8 m_fogdelta[64];          // 64-entry fog table
	u8 m_fogdelta_mask;         // mask for for delta (0xff for V1, 0xfc for V2)
	poly_array<voodoo::rasterizer_texture, 2> m_textures;
	poly_array<voodoo::rasterizer_palette, 8> m_palettes;
	voodoo::rasterizer_info *m_raster_hash[RASTER_HASH_SIZE]; // hash table of rasterizers
	voodoo::rasterizer_info *m_generic_rasterizer[16];
	std::list<voodoo::rasterizer_info> m_rasterizer_list;
	std::vector<thread_stats_block> m_thread_stats;
};

}

#endif // MAME_VIDEO_VOODOO_RENDER_H