/
r_draw_span32.h
445 lines (388 loc) · 15.2 KB
/
r_draw_span32.h
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
/*
** Drawer commands for spans
** Copyright (c) 2016 Magnus Norddahl
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any damages
** arising from the use of this software.
**
** Permission is granted to anyone to use this software for any purpose,
** including commercial applications, and to alter it and redistribute it
** freely, subject to the following restrictions:
**
** 1. The origin of this software must not be misrepresented; you must not
** claim that you wrote the original software. If you use this software
** in a product, an acknowledgment in the product documentation would be
** appreciated but is not required.
** 2. Altered source versions must be plainly marked as such, and must not be
** misrepresented as being the original software.
** 3. This notice may not be removed or altered from any source distribution.
**
*/
#pragma once
#include "swrenderer/drawers/r_draw_rgba.h"
#include "swrenderer/viewport/r_spandrawer.h"
namespace swrenderer
{
namespace DrawSpan32TModes
{
enum class SpanBlendModes { Opaque, Masked, Translucent, AddClamp, SubClamp, RevSubClamp };
struct OpaqueSpan { static const int Mode = (int)SpanBlendModes::Opaque; };
struct MaskedSpan { static const int Mode = (int)SpanBlendModes::Masked; };
struct TranslucentSpan { static const int Mode = (int)SpanBlendModes::Translucent; };
struct AddClampSpan { static const int Mode = (int)SpanBlendModes::AddClamp; };
struct SubClampSpan { static const int Mode = (int)SpanBlendModes::SubClamp; };
struct RevSubClampSpan { static const int Mode = (int)SpanBlendModes::RevSubClamp; };
enum class FilterModes { Nearest, Linear };
struct NearestFilter { static const int Mode = (int)FilterModes::Nearest; };
struct LinearFilter { static const int Mode = (int)FilterModes::Linear; };
enum class ShadeMode { Simple, Advanced };
struct SimpleShade { static const int Mode = (int)ShadeMode::Simple; };
struct AdvancedShade { static const int Mode = (int)ShadeMode::Advanced; };
enum class SpanTextureSize { SizeAny, Size64x64 };
struct TextureSizeAny { static const int Mode = (int)SpanTextureSize::SizeAny; };
struct TextureSize64x64 { static const int Mode = (int)SpanTextureSize::Size64x64; };
}
template<typename BlendT>
class DrawSpan32T : public DrawerCommand
{
protected:
SpanDrawerArgs args;
public:
DrawSpan32T(const SpanDrawerArgs &drawerargs) : args(drawerargs) { }
struct TextureData
{
uint32_t width;
uint32_t height;
uint32_t xone;
uint32_t yone;
uint32_t xstep;
uint32_t ystep;
uint32_t xfrac;
uint32_t yfrac;
const uint32_t *source;
};
void Execute(DrawerThread *thread) override
{
using namespace DrawSpan32TModes;
if (thread->line_skipped_by_thread(args.DestY())) return;
TextureData texdata;
texdata.width = args.TextureWidth();
texdata.height = args.TextureHeight();
texdata.xstep = args.TextureUStep();
texdata.ystep = args.TextureVStep();
texdata.xfrac = args.TextureUPos();
texdata.yfrac = args.TextureVPos();
texdata.source = (const uint32_t*)args.TexturePixels();
double lod = args.TextureLOD();
bool mipmapped = args.MipmappedTexture();
bool magnifying = lod < 0.0;
if (r_mipmap && mipmapped)
{
int level = (int)lod;
while (level > 0)
{
if (texdata.width <= 2 || texdata.height <= 2)
break;
texdata.source += texdata.width * texdata.height;
texdata.width = MAX<uint32_t>(texdata.width / 2, 1);
texdata.height = MAX<uint32_t>(texdata.height / 2, 1);
level--;
}
}
texdata.xone = (0x80000000u / texdata.width) << 1;
texdata.yone = (0x80000000u / texdata.height) << 1;
bool is_nearest_filter = (magnifying && !r_magfilter) || (!magnifying && !r_minfilter);
bool is_64x64 = texdata.width == 64 && texdata.height == 64;
auto shade_constants = args.ColormapConstants();
if (shade_constants.simple_shade)
{
if (is_nearest_filter)
{
if (is_64x64)
Loop<SimpleShade, NearestFilter, TextureSize64x64>(thread, texdata, shade_constants);
else
Loop<SimpleShade, NearestFilter, TextureSizeAny>(thread, texdata, shade_constants);
}
else
{
if (is_64x64)
Loop<SimpleShade, LinearFilter, TextureSize64x64>(thread, texdata, shade_constants);
else
Loop<SimpleShade, LinearFilter, TextureSizeAny>(thread, texdata, shade_constants);
}
}
else
{
if (is_nearest_filter)
{
if (is_64x64)
Loop<AdvancedShade, NearestFilter, TextureSize64x64>(thread, texdata, shade_constants);
else
Loop<AdvancedShade, NearestFilter, TextureSizeAny>(thread, texdata, shade_constants);
}
else
{
if (is_64x64)
Loop<AdvancedShade, LinearFilter, TextureSize64x64>(thread, texdata, shade_constants);
else
Loop<AdvancedShade, LinearFilter, TextureSizeAny>(thread, texdata, shade_constants);
}
}
}
template<typename ShadeModeT, typename FilterModeT, typename TextureSizeT>
FORCEINLINE void Loop(DrawerThread *thread, TextureData texdata, ShadeConstants shade_constants)
{
using namespace DrawSpan32TModes;
// Shade constants
uint32_t light = 256 - (args.Light() >> (FRACBITS - 8));
uint32_t inv_light = 256 - light;
int inv_desaturate;
BgraColor shade_fade, shade_light;
int desaturate;
if (ShadeModeT::Mode == (int)ShadeMode::Advanced)
{
inv_desaturate = 256 - shade_constants.desaturate;
shade_fade.r = shade_constants.fade_red * inv_light;
shade_fade.g = shade_constants.fade_green * inv_light;
shade_fade.b = shade_constants.fade_blue * inv_light;
shade_light.r = shade_constants.light_red;
shade_light.g = shade_constants.light_green;
shade_light.b = shade_constants.light_blue;
desaturate = shade_constants.desaturate;
}
else
{
inv_desaturate = 0;
shade_fade.r = 0;
shade_fade.g = 0;
shade_fade.b = 0;
shade_light.r = 0;
shade_light.g = 0;
shade_light.b = 0;
desaturate = 0;
}
auto lights = args.dc_lights;
auto num_lights = args.dc_num_lights;
float viewpos_x = args.dc_viewpos.X;
float step_viewpos_x = args.dc_viewpos_step.X;
int count = args.DestX2() - args.DestX1() + 1;
int pitch = args.Viewport()->RenderTarget->GetPitch();
uint32_t *dest = (uint32_t*)args.Viewport()->GetDest(args.DestX1(), args.DestY());
if (FilterModeT::Mode == (int)FilterModes::Linear)
{
texdata.xfrac -= texdata.xone / 2;
texdata.yfrac -= texdata.yone / 2;
}
uint32_t srcalpha = args.SrcAlpha() >> (FRACBITS - 8);
uint32_t destalpha = args.DestAlpha() >> (FRACBITS - 8);
for (int index = 0; index < count; index++)
{
BgraColor bgcolor;
if (BlendT::Mode != (int)SpanBlendModes::Opaque)
{
bgcolor = *dest;
}
else
{
bgcolor = 0;
}
uint32_t ifgcolor = Sample<FilterModeT, TextureSizeT>(texdata.width, texdata.height, texdata.xone, texdata.yone, texdata.xstep, texdata.ystep, texdata.xfrac, texdata.yfrac, texdata.source);
BgraColor fgcolor = Shade<ShadeModeT>(ifgcolor, light, desaturate, inv_desaturate, shade_fade, shade_light, lights, num_lights, viewpos_x);
BgraColor outcolor = Blend(fgcolor, bgcolor, srcalpha, destalpha, ifgcolor);
*dest = outcolor;
dest++;
texdata.xfrac += texdata.xstep;
texdata.yfrac += texdata.ystep;
viewpos_x += step_viewpos_x;
}
}
template<typename FilterModeT, typename TextureSizeT>
FORCEINLINE uint32_t Sample(uint32_t width, uint32_t height, uint32_t xone, uint32_t yone, uint32_t xstep, uint32_t ystep, uint32_t xfrac, uint32_t yfrac, const uint32_t *source)
{
using namespace DrawSpan32TModes;
if (FilterModeT::Mode == (int)FilterModes::Nearest && TextureSizeT::Mode == (int)SpanTextureSize::Size64x64)
{
int sample_index = ((xfrac >> (32 - 6 - 6)) & (63 * 64)) + (yfrac >> (32 - 6));
return source[sample_index];
}
else if (FilterModeT::Mode == (int)FilterModes::Nearest)
{
uint32_t x = ((xfrac >> 16) * width) >> 16;
uint32_t y = ((yfrac >> 16) * height) >> 16;
int sample_index = x * height + y;
return source[sample_index];
}
else
{
uint32_t p00, p01, p10, p11;
uint32_t frac_x, frac_y;
if (TextureSizeT::Mode == (int)SpanTextureSize::Size64x64)
{
frac_x = xfrac >> 16 << 6;
frac_y = yfrac >> 16 << 6;
uint32_t x0 = frac_x >> 16;
uint32_t y0 = frac_y >> 16;
uint32_t x1 = (x0 + 1) & 0x3f;
uint32_t y1 = (y0 + 1) & 0x3f;
p00 = source[(y0 + (x0 << 6))];
p01 = source[(y1 + (x0 << 6))];
p10 = source[(y0 + (x1 << 6))];
p11 = source[(y1 + (x1 << 6))];
}
else
{
frac_x = (xfrac >> 16) * width;
frac_y = (yfrac >> 16) * height;
uint32_t x0 = frac_x >> 16;
uint32_t y0 = frac_y >> 16;
uint32_t x1 = (((xfrac + xone) >> 16) * width) >> 16;
uint32_t y1 = (((yfrac + yone) >> 16) * height) >> 16;
p00 = source[y0 + x0 * height];
p01 = source[y1 + x0 * height];
p10 = source[y0 + x1 * height];
p11 = source[y1 + x1 * height];
}
uint32_t inv_b = (frac_x >> 12) & 15;
uint32_t inv_a = (frac_y >> 12) & 15;
uint32_t a = 16 - inv_a;
uint32_t b = 16 - inv_b;
uint32_t sred = (RPART(p00) * (a * b) + RPART(p01) * (inv_a * b) + RPART(p10) * (a * inv_b) + RPART(p11) * (inv_a * inv_b) + 127) >> 8;
uint32_t sgreen = (GPART(p00) * (a * b) + GPART(p01) * (inv_a * b) + GPART(p10) * (a * inv_b) + GPART(p11) * (inv_a * inv_b) + 127) >> 8;
uint32_t sblue = (BPART(p00) * (a * b) + BPART(p01) * (inv_a * b) + BPART(p10) * (a * inv_b) + BPART(p11) * (inv_a * inv_b) + 127) >> 8;
uint32_t salpha = (APART(p00) * (a * b) + APART(p01) * (inv_a * b) + APART(p10) * (a * inv_b) + APART(p11) * (inv_a * inv_b) + 127) >> 8;
return (salpha << 24) | (sred << 16) | (sgreen << 8) | sblue;
}
}
template<typename ShadeModeT>
FORCEINLINE BgraColor Shade(BgraColor fgcolor, uint32_t light, uint32_t desaturate, uint32_t inv_desaturate, BgraColor shade_fade, BgraColor shade_light, const DrawerLight *lights, int num_lights, float viewpos_x)
{
using namespace DrawSpan32TModes;
BgraColor material = fgcolor;
if (ShadeModeT::Mode == (int)ShadeMode::Simple)
{
fgcolor.r = (fgcolor.r * light) >> 8;
fgcolor.g = (fgcolor.g * light) >> 8;
fgcolor.b = (fgcolor.b * light) >> 8;
}
else
{
uint32_t intensity = ((fgcolor.r * 77 + fgcolor.g * 143 + fgcolor.b * 37) >> 8) * desaturate;
fgcolor.r = (((shade_fade.r + ((fgcolor.r * inv_desaturate + intensity) >> 8) * light) >> 8) * shade_light.r) >> 8;
fgcolor.g = (((shade_fade.g + ((fgcolor.g * inv_desaturate + intensity) >> 8) * light) >> 8) * shade_light.g) >> 8;
fgcolor.b = (((shade_fade.b + ((fgcolor.b * inv_desaturate + intensity) >> 8) * light) >> 8) * shade_light.b) >> 8;
}
return AddLights(material, fgcolor, lights, num_lights, viewpos_x);
}
FORCEINLINE BgraColor AddLights(BgraColor material, BgraColor fgcolor, const DrawerLight *lights, int num_lights, float viewpos_x)
{
using namespace DrawSpan32TModes;
BgraColor lit;
lit.r = 0;
lit.g = 0;
lit.b = 0;
for (int i = 0; i != num_lights; i++)
{
float light_x = lights[i].x;
float light_y = lights[i].y;
float light_z = lights[i].z;
float light_radius = lights[i].radius;
// L = light-pos
// dist = sqrt(dot(L, L))
// distance_attenuation = 1 - MIN(dist * (1/radius), 1)
float Lyz2 = light_y; // L.y*L.y + L.z*L.z
float Lx = light_x - viewpos_x;
float dist2 = Lyz2 + Lx * Lx;
float rcp_dist = 1.f/sqrt(dist2);
float dist = dist2 * rcp_dist;
float distance_attenuation = 256.0f - MIN(dist * light_radius, 256.0f);
// The simple light type
float simple_attenuation = distance_attenuation;
// The point light type
// diffuse = dot(N,L) * attenuation
float point_attenuation = light_z * rcp_dist * distance_attenuation;
uint32_t attenuation = (int32_t)((light_z == 0.0f) ? simple_attenuation : point_attenuation);
BgraColor light_color = lights[i].color;
lit.r += (light_color.r * attenuation) >> 8;
lit.g += (light_color.g * attenuation) >> 8;
lit.b += (light_color.b * attenuation) >> 8;
}
lit.r = MIN<uint32_t>(lit.r, 256);
lit.g = MIN<uint32_t>(lit.g, 256);
lit.b = MIN<uint32_t>(lit.b, 256);
fgcolor.r = MIN<uint32_t>(fgcolor.r + ((material.r * lit.r) >> 8), 255);
fgcolor.g = MIN<uint32_t>(fgcolor.g + ((material.g * lit.g) >> 8), 255);
fgcolor.b = MIN<uint32_t>(fgcolor.b + ((material.b * lit.b) >> 8), 255);
return fgcolor;
}
FORCEINLINE BgraColor Blend(BgraColor fgcolor, BgraColor bgcolor, uint32_t srcalpha, uint32_t destalpha, unsigned int ifgcolor)
{
using namespace DrawSpan32TModes;
if (BlendT::Mode == (int)SpanBlendModes::Opaque)
{
fgcolor.a = 255;
return fgcolor;
}
else if (BlendT::Mode == (int)SpanBlendModes::Masked)
{
return (ifgcolor == 0) ? bgcolor : fgcolor;
}
else if (BlendT::Mode == (int)SpanBlendModes::Translucent)
{
fgcolor.r = fgcolor.r * srcalpha;
fgcolor.g = fgcolor.g * srcalpha;
fgcolor.b = fgcolor.b * srcalpha;
bgcolor.r = bgcolor.r * destalpha;
bgcolor.g = bgcolor.g * destalpha;
bgcolor.b = bgcolor.b * destalpha;
BgraColor outcolor;
outcolor.r = MIN<uint32_t>((fgcolor.r + bgcolor.r) >> 8, 255);
outcolor.g = MIN<uint32_t>((fgcolor.g + bgcolor.g) >> 8, 255);
outcolor.b = MIN<uint32_t>((fgcolor.b + bgcolor.b) >> 8, 255);
return outcolor;
}
else
{
uint32_t alpha = APART(ifgcolor);
alpha += alpha >> 7; // 255->256
uint32_t inv_alpha = 256 - alpha;
uint32_t bgalpha = (destalpha * alpha + (inv_alpha << 8) + 128) >> 8;
uint32_t fgalpha = (srcalpha * alpha + 128) >> 8;
fgcolor.r *= fgalpha;
fgcolor.g *= fgalpha;
fgcolor.b *= fgalpha;
bgcolor.r *= bgalpha;
bgcolor.g *= bgalpha;
bgcolor.b *= bgalpha;
BgraColor outcolor;
if (BlendT::Mode == (int)SpanBlendModes::AddClamp)
{
outcolor.r = MIN<uint32_t>((fgcolor.r + bgcolor.r) >> 8, 255);
outcolor.g = MIN<uint32_t>((fgcolor.g + bgcolor.g) >> 8, 255);
outcolor.b = MIN<uint32_t>((fgcolor.b + bgcolor.b) >> 8, 255);
}
else if (BlendT::Mode == (int)SpanBlendModes::SubClamp)
{
outcolor.r = MAX(int32_t(fgcolor.r - bgcolor.r) >> 8, 0);
outcolor.g = MAX(int32_t(fgcolor.g - bgcolor.g) >> 8, 0);
outcolor.b = MAX(int32_t(fgcolor.b - bgcolor.b) >> 8, 0);
}
else if (BlendT::Mode == (int)SpanBlendModes::RevSubClamp)
{
outcolor.r = MAX(int32_t(bgcolor.r - fgcolor.r) >> 8, 0);
outcolor.g = MAX(int32_t(bgcolor.g - fgcolor.g) >> 8, 0);
outcolor.b = MAX(int32_t(bgcolor.b - fgcolor.b) >> 8, 0);
}
outcolor.a = 255;
return outcolor;
}
}
FString DebugInfo() override { return "DrawSpan32T"; }
};
typedef DrawSpan32T<DrawSpan32TModes::OpaqueSpan> DrawSpan32Command;
typedef DrawSpan32T<DrawSpan32TModes::MaskedSpan> DrawSpanMasked32Command;
typedef DrawSpan32T<DrawSpan32TModes::TranslucentSpan> DrawSpanTranslucent32Command;
typedef DrawSpan32T<DrawSpan32TModes::AddClampSpan> DrawSpanAddClamp32Command;
typedef DrawSpan32T<DrawSpan32TModes::SubClampSpan> DrawSpanSubClamp32Command;
typedef DrawSpan32T<DrawSpan32TModes::RevSubClampSpan> DrawSpanRevSubClamp32Command;
}