src/gba/renderers/video-software.c (view raw)
1#include "video-software.h"
2
3#include "gba.h"
4#include "gba-io.h"
5
6#define UNUSED(X) (void) (X)
7
8static const int _objSizes[32] = {
9 8, 8,
10 16, 16,
11 32, 32,
12 64, 64,
13 16, 8,
14 32, 8,
15 32, 16,
16 64, 32,
17 8, 16,
18 8, 32,
19 16, 32,
20 32, 64,
21 0, 0,
22 0, 0,
23 0, 0,
24 0, 0
25};
26
27static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer);
28static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer);
29static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam);
30static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
31static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
32static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y);
33static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer);
34
35static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer);
36static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value);
37static void GBAVideoSoftwareRendererWriteBGPA(struct GBAVideoSoftwareBackground* bg, uint16_t value);
38static void GBAVideoSoftwareRendererWriteBGPB(struct GBAVideoSoftwareBackground* bg, uint16_t value);
39static void GBAVideoSoftwareRendererWriteBGPC(struct GBAVideoSoftwareBackground* bg, uint16_t value);
40static void GBAVideoSoftwareRendererWriteBGPD(struct GBAVideoSoftwareBackground* bg, uint16_t value);
41static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value);
42static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value);
43static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value);
44static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value);
45static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value);
46
47static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y);
48static void _drawBackgroundMode0(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* background, int y);
49static void _drawBackgroundMode2(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* background, int y);
50static void _drawBackgroundMode3(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* background, int y);
51static void _drawBackgroundMode4(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* background, int y);
52static void _drawBackgroundMode5(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* background, int y);
53static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer);
54static int _preprocessTransformedSprite(struct GBAVideoSoftwareRenderer* renderer, struct GBATransformedObj* sprite, int y);
55static int _preprocessSprite(struct GBAVideoSoftwareRenderer* renderer, struct GBAObj* sprite, int y);
56static void _postprocessSprite(struct GBAVideoSoftwareRenderer* renderer, unsigned priority);
57
58static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer);
59static inline unsigned _brighten(unsigned color, int y);
60static inline unsigned _darken(unsigned color, int y);
61static unsigned _mix(int weightA, unsigned colorA, int weightB, unsigned colorB);
62
63void GBAVideoSoftwareRendererCreate(struct GBAVideoSoftwareRenderer* renderer) {
64 renderer->d.init = GBAVideoSoftwareRendererInit;
65 renderer->d.deinit = GBAVideoSoftwareRendererDeinit;
66 renderer->d.writeVideoRegister = GBAVideoSoftwareRendererWriteVideoRegister;
67 renderer->d.writeOAM = GBAVideoSoftwareRendererWriteOAM;
68 renderer->d.writePalette = GBAVideoSoftwareRendererWritePalette;
69 renderer->d.drawScanline = GBAVideoSoftwareRendererDrawScanline;
70 renderer->d.finishFrame = GBAVideoSoftwareRendererFinishFrame;
71}
72
73static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer) {
74 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
75 int i;
76
77 softwareRenderer->dispcnt.packed = 0x0080;
78
79 softwareRenderer->target1Obj = 0;
80 softwareRenderer->target1Bd = 0;
81 softwareRenderer->target2Obj = 0;
82 softwareRenderer->target2Bd = 0;
83 softwareRenderer->blendEffect = BLEND_NONE;
84 memset(softwareRenderer->normalPalette, 0, sizeof(softwareRenderer->normalPalette));
85 memset(softwareRenderer->variantPalette, 0, sizeof(softwareRenderer->variantPalette));
86
87 softwareRenderer->blda = 0;
88 softwareRenderer->bldb = 0;
89 softwareRenderer->bldy = 0;
90
91 softwareRenderer->winN[0].h.packed = 0;
92 softwareRenderer->winN[0].v.packed = 0;
93 softwareRenderer->winN[0].control.packed = 0;
94 softwareRenderer->winN[0].control.priority = 0;
95 softwareRenderer->winN[1].h.packed = 0;
96 softwareRenderer->winN[1].v.packed = 0;
97 softwareRenderer->winN[1].control.packed = 0;
98 softwareRenderer->winN[1].control.priority = 1;
99 softwareRenderer->objwin.packed = 0;
100 softwareRenderer->objwin.priority = 2;
101 softwareRenderer->winout.packed = 0;
102 softwareRenderer->winout.priority = 3;
103
104 softwareRenderer->mosaic.packed = 0;
105
106 for (i = 0; i < 4; ++i) {
107 struct GBAVideoSoftwareBackground* bg = &softwareRenderer->bg[i];
108 bg->index = i;
109 bg->enabled = 0;
110 bg->priority = 0;
111 bg->charBase = 0;
112 bg->mosaic = 0;
113 bg->multipalette = 0;
114 bg->screenBase = 0;
115 bg->overflow = 0;
116 bg->size = 0;
117 bg->target1 = 0;
118 bg->target2 = 0;
119 bg->x = 0;
120 bg->y = 0;
121 bg->refx = 0;
122 bg->refy = 0;
123 bg->dx = 256;
124 bg->dmx = 0;
125 bg->dy = 0;
126 bg->dmy = 256;
127 bg->sx = 0;
128 bg->sy = 0;
129 }
130}
131
132static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer) {
133 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
134 UNUSED(softwareRenderer);
135}
136
137static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
138 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
139 switch (address) {
140 case REG_DISPCNT:
141 softwareRenderer->dispcnt.packed = value;
142 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
143 break;
144 case REG_BG0CNT:
145 value &= 0xFFCF;
146 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
147 break;
148 case REG_BG1CNT:
149 value &= 0xFFCF;
150 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
151 break;
152 case REG_BG2CNT:
153 value &= 0xFFCF;
154 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
155 break;
156 case REG_BG3CNT:
157 value &= 0xFFCF;
158 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
159 break;
160 case REG_BG0HOFS:
161 value &= 0x01FF;
162 softwareRenderer->bg[0].x = value;
163 break;
164 case REG_BG0VOFS:
165 value &= 0x01FF;
166 softwareRenderer->bg[0].y = value;
167 break;
168 case REG_BG1HOFS:
169 value &= 0x01FF;
170 softwareRenderer->bg[1].x = value;
171 break;
172 case REG_BG1VOFS:
173 value &= 0x01FF;
174 softwareRenderer->bg[1].y = value;
175 break;
176 case REG_BG2HOFS:
177 value &= 0x01FF;
178 softwareRenderer->bg[2].x = value;
179 break;
180 case REG_BG2VOFS:
181 value &= 0x01FF;
182 softwareRenderer->bg[2].y = value;
183 break;
184 case REG_BG3HOFS:
185 value &= 0x01FF;
186 softwareRenderer->bg[3].x = value;
187 break;
188 case REG_BG3VOFS:
189 value &= 0x01FF;
190 softwareRenderer->bg[3].y = value;
191 break;
192 case REG_BG2PA:
193 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[2], value);
194 break;
195 case REG_BG2PB:
196 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[2], value);
197 break;
198 case REG_BG2PC:
199 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[2], value);
200 break;
201 case REG_BG2PD:
202 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[2], value);
203 break;
204 case REG_BG2X_LO:
205 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[2], value);
206 break;
207 case REG_BG2X_HI:
208 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[2], value);
209 break;
210 case REG_BG2Y_LO:
211 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[2], value);
212 break;
213 case REG_BG2Y_HI:
214 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[2], value);
215 break;
216 case REG_BG3PA:
217 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[3], value);
218 break;
219 case REG_BG3PB:
220 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[3], value);
221 break;
222 case REG_BG3PC:
223 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[3], value);
224 break;
225 case REG_BG3PD:
226 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[3], value);
227 break;
228 case REG_BG3X_LO:
229 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[3], value);
230 break;
231 case REG_BG3X_HI:
232 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[3], value);
233 break;
234 case REG_BG3Y_LO:
235 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[3], value);
236 break;
237 case REG_BG3Y_HI:
238 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[3], value);
239 break;
240 case REG_BLDCNT:
241 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
242 break;
243 case REG_BLDALPHA:
244 softwareRenderer->blda = value & 0x1F;
245 if (softwareRenderer->blda > 0x10) {
246 softwareRenderer->blda = 0x10;
247 }
248 softwareRenderer->bldb = (value >> 8) & 0x1F;
249 if (softwareRenderer->bldb > 0x10) {
250 softwareRenderer->bldb = 0x10;
251 }
252 break;
253 case REG_BLDY:
254 softwareRenderer->bldy = value & 0x1F;
255 if (softwareRenderer->bldy > 0x10) {
256 softwareRenderer->bldy = 0x10;
257 }
258 _updatePalettes(softwareRenderer);
259 break;
260 case REG_WIN0H:
261 softwareRenderer->winN[0].h.packed = value;
262 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[0].h.start != softwareRenderer->winN[0].h.end) {
263 softwareRenderer->winN[0].h.start = 0;
264 }
265 if (softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end || softwareRenderer->winN[0].h.end > VIDEO_HORIZONTAL_PIXELS) {
266 softwareRenderer->winN[0].h.end = VIDEO_HORIZONTAL_PIXELS;
267 }
268 break;
269 case REG_WIN1H:
270 softwareRenderer->winN[1].h.packed = value;
271 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[1].h.start != softwareRenderer->winN[1].h.end) {
272 softwareRenderer->winN[1].h.start = 0;
273 }
274 if (softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end || softwareRenderer->winN[1].h.end > VIDEO_HORIZONTAL_PIXELS) {
275 softwareRenderer->winN[1].h.end = VIDEO_HORIZONTAL_PIXELS;
276 }
277 break;
278 case REG_WIN0V:
279 softwareRenderer->winN[0].v.packed = value;
280 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[0].v.start != softwareRenderer->winN[0].v.end) {
281 softwareRenderer->winN[0].v.start = 0;
282 }
283 if (softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end || softwareRenderer->winN[0].v.end > VIDEO_HORIZONTAL_PIXELS) {
284 softwareRenderer->winN[0].v.end = VIDEO_VERTICAL_PIXELS;
285 }
286 break;
287 case REG_WIN1V:
288 softwareRenderer->winN[1].v.packed = value;
289 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[1].v.start != softwareRenderer->winN[1].v.end) {
290 softwareRenderer->winN[1].v.start = 0;
291 }
292 if (softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end || softwareRenderer->winN[1].v.end > VIDEO_HORIZONTAL_PIXELS) {
293 softwareRenderer->winN[1].v.end = VIDEO_VERTICAL_PIXELS;
294 }
295 break;
296 case REG_WININ:
297 softwareRenderer->winN[0].control.packed = value;
298 softwareRenderer->winN[1].control.packed = value >> 8;
299 break;
300 case REG_WINOUT:
301 softwareRenderer->winout.packed = value;
302 softwareRenderer->objwin.packed = value >> 8;
303 break;
304 case REG_MOSAIC:
305 softwareRenderer->mosaic.packed = value;
306 break;
307 case REG_GREENSWP:
308 GBALog(0, GBA_LOG_STUB, "Stub video register write: 0x%03X", address);
309 break;
310 default:
311 GBALog(0, GBA_LOG_GAME_ERROR, "Invalid video register: 0x%03X", address);
312 }
313 return value;
314}
315
316static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
317 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
318 softwareRenderer->oamDirty = 1;
319 UNUSED(oam);
320}
321
322static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
323 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
324#ifdef COLOR_16_BIT
325#ifdef COLOR_5_6_5
326 unsigned color = 0;
327 color |= (value & 0x001F) << 11;
328 color |= (value & 0x03E0) << 1;
329 color |= (value & 0x7C00) >> 10;
330#else
331 unsigned color = value;
332#endif
333#else
334 unsigned color = 0;
335 color |= (value << 3) & 0xF8;
336 color |= (value << 6) & 0xF800;
337 color |= (value << 9) & 0xF80000;
338#endif
339 softwareRenderer->normalPalette[address >> 1] = color;
340 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
341 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
342 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
343 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
344 }
345}
346
347static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
348 int activeWindow;
349 int startX = 0;
350 if (win->h.end > 0) {
351 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
352 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
353 // Insert a window before the end of the active window
354 struct Window oldWindow = softwareRenderer->windows[activeWindow];
355 if (win->h.start > startX) {
356 // And after the start of the active window
357 int nextWindow = softwareRenderer->nWindows;
358 ++softwareRenderer->nWindows;
359 for (; nextWindow > activeWindow; --nextWindow) {
360 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
361 }
362 softwareRenderer->windows[activeWindow].endX = win->h.start;
363 ++activeWindow;
364 }
365 softwareRenderer->windows[activeWindow].control = win->control;
366 softwareRenderer->windows[activeWindow].endX = win->h.end;
367 if (win->h.end >= oldWindow.endX) {
368 // Trim off extra windows we've overwritten
369 for (++activeWindow; win->h.end >= softwareRenderer->windows[activeWindow].endX && softwareRenderer->nWindows > activeWindow; ++activeWindow) {
370 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
371 --softwareRenderer->nWindows;
372 }
373 } else {
374 ++activeWindow;
375 int nextWindow = softwareRenderer->nWindows;
376 ++softwareRenderer->nWindows;
377 for (; nextWindow > activeWindow; --nextWindow) {
378 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
379 }
380 softwareRenderer->windows[activeWindow] = oldWindow;
381 }
382 break;
383 }
384 startX = softwareRenderer->windows[activeWindow].endX;
385 }
386 }
387}
388
389static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer) {
390 int i;
391 int oamMax = 0;
392 for (i = 0; i < 128; ++i) {
393 struct GBAObj* obj = &renderer->d.oam->obj[i];
394 if (obj->transformed || !obj->disable) {
395 int height = _objSizes[obj->shape * 8 + obj->size * 2 + 1];
396 if (obj->transformed) {
397 height <<= ((struct GBATransformedObj*) obj)->doublesize;
398 }
399 if (obj->y < VIDEO_VERTICAL_PIXELS || obj->y + height >= VIDEO_VERTICAL_TOTAL_PIXELS) {
400 renderer->sprites[oamMax].y = obj->y;
401 renderer->sprites[oamMax].endY = obj->y + height;
402 renderer->sprites[oamMax].obj = *obj;
403 ++oamMax;
404 }
405 }
406 }
407 renderer->oamMax = oamMax;
408 renderer->oamDirty = 0;
409}
410
411
412static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
413 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
414
415 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
416 if (softwareRenderer->dispcnt.forcedBlank) {
417 int x;
418 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
419 row[x] = GBA_COLOR_WHITE;
420 }
421 return;
422 }
423
424 int x;
425 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; x += 4) {
426 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
427 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
428 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
429 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
430 }
431
432 softwareRenderer->windows[0].endX = VIDEO_HORIZONTAL_PIXELS;
433 softwareRenderer->nWindows = 1;
434 if (softwareRenderer->dispcnt.win0Enable || softwareRenderer->dispcnt.win1Enable || softwareRenderer->dispcnt.objwinEnable) {
435 softwareRenderer->windows[0].control = softwareRenderer->winout;
436 if (softwareRenderer->dispcnt.win1Enable && y < softwareRenderer->winN[1].v.end && y >= softwareRenderer->winN[1].v.start) {
437 _breakWindow(softwareRenderer, &softwareRenderer->winN[1]);
438 }
439 if (softwareRenderer->dispcnt.win0Enable && y < softwareRenderer->winN[0].v.end && y >= softwareRenderer->winN[0].v.start) {
440 _breakWindow(softwareRenderer, &softwareRenderer->winN[0]);
441 }
442 } else {
443 softwareRenderer->windows[0].control.packed = 0xFF;
444 }
445
446 int w;
447 x = 0;
448 for (w = 0; w < softwareRenderer->nWindows; ++w) {
449 // TOOD: handle objwin on backdrop
450 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
451 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !softwareRenderer->windows[w].control.blendEnable) {
452 backdrop |= softwareRenderer->normalPalette[0];
453 } else {
454 backdrop |= softwareRenderer->variantPalette[0];
455 }
456 int end = softwareRenderer->windows[w].endX;
457 for (; x < end; ++x) {
458 softwareRenderer->row[x] = backdrop;
459 }
460 }
461
462 _drawScanline(softwareRenderer, y);
463
464 if (softwareRenderer->target2Bd) {
465 x = 0;
466 for (w = 0; w < softwareRenderer->nWindows; ++w) {
467 uint32_t backdrop = FLAG_UNWRITTEN;
468 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !softwareRenderer->windows[w].control.blendEnable) {
469 backdrop |= softwareRenderer->normalPalette[0];
470 } else {
471 backdrop |= softwareRenderer->variantPalette[0];
472 }
473 int end = softwareRenderer->windows[w].endX;
474 for (; x < end; ++x) {
475 uint32_t color = softwareRenderer->row[x];
476 if (color & FLAG_TARGET_1) {
477 softwareRenderer->row[x] = _mix(softwareRenderer->bldb, backdrop, softwareRenderer->blda, color);
478 }
479 }
480 }
481 }
482
483#ifdef COLOR_16_BIT
484#ifdef __arm__
485 _to16Bit(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS);
486#else
487 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
488 row[x] = softwareRenderer->row[x];
489 }
490#endif
491#else
492 memcpy(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS * sizeof(*row));
493#endif
494}
495
496static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
497 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
498
499 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
500 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
501 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
502 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
503}
504
505static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
506 renderer->bg[0].enabled = renderer->dispcnt.bg0Enable;
507 renderer->bg[1].enabled = renderer->dispcnt.bg1Enable;
508 renderer->bg[2].enabled = renderer->dispcnt.bg2Enable;
509 renderer->bg[3].enabled = renderer->dispcnt.bg3Enable;
510}
511
512static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
513 UNUSED(renderer);
514 union GBARegisterBGCNT reg = { .packed = value };
515 bg->priority = reg.priority;
516 bg->charBase = reg.charBase << 14;
517 bg->mosaic = reg.mosaic;
518 bg->multipalette = reg.multipalette;
519 bg->screenBase = reg.screenBase << 11;
520 bg->overflow = reg.overflow;
521 bg->size = reg.size;
522}
523
524static void GBAVideoSoftwareRendererWriteBGPA(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
525 bg->dx = value;
526}
527
528static void GBAVideoSoftwareRendererWriteBGPB(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
529 bg->dmx = value;
530}
531
532static void GBAVideoSoftwareRendererWriteBGPC(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
533 bg->dy = value;
534}
535
536static void GBAVideoSoftwareRendererWriteBGPD(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
537 bg->dmy = value;
538}
539
540static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
541 bg->refx = (bg->refx & 0xFFFF0000) | value;
542 bg->sx = bg->refx;
543}
544
545static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
546 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
547 bg->refx <<= 4;
548 bg->refx >>= 4;
549 bg->sx = bg->refx;
550}
551
552static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
553 bg->refy = (bg->refy & 0xFFFF0000) | value;
554 bg->sy = bg->refy;
555}
556
557static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
558 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
559 bg->refy <<= 4;
560 bg->refy >>= 4;
561 bg->sy = bg->refy;
562}
563
564static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
565 union {
566 struct {
567 unsigned target1Bg0 : 1;
568 unsigned target1Bg1 : 1;
569 unsigned target1Bg2 : 1;
570 unsigned target1Bg3 : 1;
571 unsigned target1Obj : 1;
572 unsigned target1Bd : 1;
573 enum BlendEffect effect : 2;
574 unsigned target2Bg0 : 1;
575 unsigned target2Bg1 : 1;
576 unsigned target2Bg2 : 1;
577 unsigned target2Bg3 : 1;
578 unsigned target2Obj : 1;
579 unsigned target2Bd : 1;
580 };
581 uint16_t packed;
582 } bldcnt = { .packed = value };
583
584 enum BlendEffect oldEffect = renderer->blendEffect;
585
586 renderer->bg[0].target1 = bldcnt.target1Bg0;
587 renderer->bg[1].target1 = bldcnt.target1Bg1;
588 renderer->bg[2].target1 = bldcnt.target1Bg2;
589 renderer->bg[3].target1 = bldcnt.target1Bg3;
590 renderer->bg[0].target2 = bldcnt.target2Bg0;
591 renderer->bg[1].target2 = bldcnt.target2Bg1;
592 renderer->bg[2].target2 = bldcnt.target2Bg2;
593 renderer->bg[3].target2 = bldcnt.target2Bg3;
594
595 renderer->blendEffect = bldcnt.effect;
596 renderer->target1Obj = bldcnt.target1Obj;
597 renderer->target1Bd = bldcnt.target1Bd;
598 renderer->target2Obj = bldcnt.target2Obj;
599 renderer->target2Bd = bldcnt.target2Bd;
600
601 renderer->anyTarget2 = bldcnt.packed & 0x3F00;
602
603 if (oldEffect != renderer->blendEffect) {
604 _updatePalettes(renderer);
605 }
606}
607
608#define TEST_LAYER_ENABLED(X) \
609 (renderer->bg[X].enabled && \
610 (renderer->currentWindow.bg ## X ## Enable || \
611 (renderer->dispcnt.objwinEnable && renderer->objwin.bg ## X ## Enable)) && \
612 renderer->bg[X].priority == priority)
613
614static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y) {
615 int w;
616 renderer->end = 0;
617 int spriteLayers = 0;
618 if (renderer->dispcnt.objEnable) {
619 if (renderer->oamDirty) {
620 _cleanOAM(renderer);
621 }
622 int mosaicV = renderer->mosaic.objV + 1;
623 int mosaicY = y - (y % mosaicV);
624 for (w = 0; w < renderer->nWindows; ++w) {
625 renderer->start = renderer->end;
626 renderer->end = renderer->windows[w].endX;
627 renderer->currentWindow = renderer->windows[w].control;
628 if (!renderer->currentWindow.objEnable) {
629 continue;
630 }
631 int i;
632 int drawn;
633 for (i = 0; i < renderer->oamMax; ++i) {
634 int localY = y;
635 struct GBAVideoSoftwareSprite* sprite = &renderer->sprites[i];
636 if (sprite->obj.mosaic) {
637 localY = mosaicY;
638 }
639 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
640 continue;
641 }
642 if (sprite->obj.transformed) {
643 drawn = _preprocessTransformedSprite(renderer, &sprite->tobj, localY);
644 } else {
645 drawn = _preprocessSprite(renderer, &sprite->obj, localY);
646 }
647 spriteLayers |= drawn << sprite->obj.priority;
648 }
649 }
650 }
651
652 int priority;
653 for (priority = 0; priority < 4; ++priority) {
654 if (spriteLayers & (1 << priority)) {
655 _postprocessSprite(renderer, priority);
656 }
657 renderer->end = 0;
658 for (w = 0; w < renderer->nWindows; ++w) {
659 renderer->start = renderer->end;
660 renderer->end = renderer->windows[w].endX;
661 renderer->currentWindow = renderer->windows[w].control;
662 if (TEST_LAYER_ENABLED(0) && renderer->dispcnt.mode < 2) {
663 _drawBackgroundMode0(renderer, &renderer->bg[0], y);
664 }
665 if (TEST_LAYER_ENABLED(1) && renderer->dispcnt.mode < 2) {
666 _drawBackgroundMode0(renderer, &renderer->bg[1], y);
667 }
668 if (TEST_LAYER_ENABLED(2)) {
669 switch (renderer->dispcnt.mode) {
670 case 0:
671 _drawBackgroundMode0(renderer, &renderer->bg[2], y);
672 break;
673 case 1:
674 case 2:
675 _drawBackgroundMode2(renderer, &renderer->bg[2], y);
676 break;
677 case 3:
678 _drawBackgroundMode3(renderer, &renderer->bg[2], y);
679 break;
680 case 4:
681 _drawBackgroundMode4(renderer, &renderer->bg[2], y);
682 break;
683 case 5:
684 _drawBackgroundMode5(renderer, &renderer->bg[2], y);
685 break;
686 }
687 }
688 if (TEST_LAYER_ENABLED(3)) {
689 switch (renderer->dispcnt.mode) {
690 case 0:
691 _drawBackgroundMode0(renderer, &renderer->bg[3], y);
692 break;
693 case 2:
694 _drawBackgroundMode2(renderer, &renderer->bg[3], y);
695 break;
696 }
697 }
698 }
699 }
700 renderer->bg[2].sx += renderer->bg[2].dmx;
701 renderer->bg[2].sy += renderer->bg[2].dmy;
702 renderer->bg[3].sx += renderer->bg[3].dmx;
703 renderer->bg[3].sy += renderer->bg[3].dmy;
704}
705
706// We stash the priority on the top bits so we can do a one-operator comparison
707// The lower the number, the higher the priority, and sprites take precendence over backgrounds
708// We want to do special processing if the color pixel is target 1, however
709
710static inline void _compositeBlendObjwin(struct GBAVideoSoftwareRenderer* renderer, uint32_t* pixel, uint32_t color, uint32_t current) {
711 if (color >= current) {
712 if (current & FLAG_TARGET_1 && color & FLAG_TARGET_2) {
713 color = _mix(renderer->blda, current, renderer->bldb, color);
714 } else {
715 color = current & 0x00FFFFFF;
716 }
717 } else {
718 color = (color & ~FLAG_TARGET_2) | (current & FLAG_OBJWIN);
719 }
720 *pixel = color;
721}
722
723static inline void _compositeBlendNoObjwin(struct GBAVideoSoftwareRenderer* renderer, uint32_t* pixel, uint32_t color, uint32_t current) {
724 // We stash the priority on the top bits so we can do a one-operator comparison
725 // The lower the number, the higher the priority, and sprites take precendence over backgrounds
726 // We want to do special processing if the color pixel is target 1, however
727 if (color >= current) {
728 if (current & FLAG_TARGET_1 && color & FLAG_TARGET_2) {
729 color = _mix(renderer->blda, current, renderer->bldb, color);
730 } else {
731 color = current & 0x00FFFFFF;
732 }
733 } else {
734 color = color & ~FLAG_TARGET_2;
735 }
736 *pixel = color;
737}
738
739static inline void _compositeNoBlendObjwin(struct GBAVideoSoftwareRenderer* renderer, uint32_t* pixel, uint32_t color, uint32_t current) {
740 UNUSED(renderer);
741 if (color < current) {
742 *pixel = color | (current & FLAG_OBJWIN);
743 }
744}
745
746static inline void _compositeNoBlendNoObjwin(struct GBAVideoSoftwareRenderer* renderer, uint32_t* pixel, uint32_t color, uint32_t current) {
747 UNUSED(renderer);
748 if (color < current) {
749 *pixel = color;
750 }
751}
752
753#define COMPOSITE_16_OBJWIN(BLEND) \
754 if (objwinForceEnable || !(current & FLAG_OBJWIN) == objwinOnly) { \
755 unsigned color = (current & FLAG_OBJWIN) ? objwinPalette[paletteData | pixelData] : palette[pixelData]; \
756 _composite ## BLEND ## Objwin(renderer, pixel, color | flags, current); \
757 }
758
759#define COMPOSITE_16_NO_OBJWIN(BLEND) \
760 _composite ## BLEND ## NoObjwin(renderer, pixel, palette[pixelData] | flags, current);
761
762#define COMPOSITE_256_OBJWIN(BLEND) \
763 if (objwinForceEnable || !(current & FLAG_OBJWIN) == objwinOnly) { \
764 unsigned color = (current & FLAG_OBJWIN) ? objwinPalette[pixelData] : palette[pixelData]; \
765 _composite ## BLEND ## Objwin(renderer, pixel, color | flags, current); \
766 }
767
768#define COMPOSITE_256_NO_OBJWIN(BLEND) \
769 COMPOSITE_16_NO_OBJWIN(BLEND)
770
771
772#define COMPOSITE_16_NO_OBJWIN(BLEND) \
773 _composite ## BLEND ## NoObjwin(renderer, pixel, palette[pixelData] | flags, current);
774
775#define BACKGROUND_DRAW_PIXEL_16(BLEND, OBJWIN) \
776 pixelData = tileData & 0xF; \
777 current = *pixel; \
778 if (pixelData && IS_WRITABLE(current)) { \
779 COMPOSITE_16_ ## OBJWIN (BLEND); \
780 } \
781 tileData >>= 4;
782
783#define BACKGROUND_DRAW_PIXEL_256(BLEND, OBJWIN) \
784 pixelData = tileData & 0xFF; \
785 current = *pixel; \
786 if (pixelData && IS_WRITABLE(current)) { \
787 COMPOSITE_256_ ## OBJWIN (BLEND); \
788 } \
789 tileData >>= 8;
790
791#define BACKGROUND_TEXT_SELECT_CHARACTER \
792 localX = tileX * 8 + inX; \
793 xBase = localX & 0xF8; \
794 if (background->size & 1) { \
795 xBase += (localX & 0x100) << 5; \
796 } \
797 screenBase = yBase + (xBase >> 3); \
798 mapData = renderer->d.vram[screenBase]; \
799 localY = inY & 0x7; \
800 if (GBA_TEXT_MAP_VFLIP(mapData)) { \
801 localY = 7 - localY; \
802 }
803
804#define PREPARE_OBJWIN \
805 int objwinSlowPath = renderer->dispcnt.objwinEnable; \
806 int objwinOnly = 0; \
807 int objwinForceEnable = 0; \
808 color_t* objwinPalette; \
809 if (objwinSlowPath) { \
810 if (background->target1 && renderer->objwin.blendEnable && (renderer->blendEffect == BLEND_BRIGHTEN || renderer->blendEffect == BLEND_DARKEN)) { \
811 objwinPalette = renderer->variantPalette; \
812 } else { \
813 objwinPalette = renderer->normalPalette; \
814 } \
815 switch (background->index) { \
816 case 0: \
817 objwinForceEnable = renderer->objwin.bg0Enable && renderer->currentWindow.bg0Enable; \
818 objwinOnly = !renderer->objwin.bg0Enable; \
819 break; \
820 case 1: \
821 objwinForceEnable = renderer->objwin.bg1Enable && renderer->currentWindow.bg1Enable; \
822 objwinOnly = !renderer->objwin.bg1Enable; \
823 break; \
824 case 2: \
825 objwinForceEnable = renderer->objwin.bg2Enable && renderer->currentWindow.bg2Enable; \
826 objwinOnly = !renderer->objwin.bg2Enable; \
827 break; \
828 case 3: \
829 objwinForceEnable = renderer->objwin.bg3Enable && renderer->currentWindow.bg3Enable; \
830 objwinOnly = !renderer->objwin.bg3Enable; \
831 break; \
832 } \
833 }
834
835#define DRAW_BACKGROUND_MODE_0_TILE_SUFFIX_16(BLEND, OBJWIN) \
836 paletteData = GBA_TEXT_MAP_PALETTE(mapData) << 4; \
837 palette = &mainPalette[paletteData]; \
838 charBase = ((background->charBase + (GBA_TEXT_MAP_TILE(mapData) << 5)) >> 2) + localY; \
839 tileData = ((uint32_t*)renderer->d.vram)[charBase]; \
840 if (!GBA_TEXT_MAP_HFLIP(mapData)) { \
841 tileData >>= 4 * mod8; \
842 for (; outX < end; ++outX) { \
843 uint32_t* pixel = &renderer->row[outX]; \
844 BACKGROUND_DRAW_PIXEL_16(BLEND, OBJWIN); \
845 } \
846 } else { \
847 for (outX = end - 1; outX >= renderer->start; --outX) { \
848 uint32_t* pixel = &renderer->row[outX]; \
849 BACKGROUND_DRAW_PIXEL_16(BLEND, OBJWIN); \
850 } \
851 }
852
853#define DRAW_BACKGROUND_MODE_0_TILE_PREFIX_16(BLEND, OBJWIN) \
854 charBase = ((background->charBase + (GBA_TEXT_MAP_TILE(mapData) << 5)) >> 2) + localY; \
855 tileData = ((uint32_t*)renderer->d.vram)[charBase]; \
856 paletteData = GBA_TEXT_MAP_PALETTE(mapData) << 4; \
857 palette = &mainPalette[paletteData]; \
858 if (!GBA_TEXT_MAP_HFLIP(mapData)) { \
859 outX = renderer->end - mod8; \
860 if (outX < renderer->start) { \
861 tileData >>= 4 * (renderer->start - outX); \
862 outX = renderer->start; \
863 } \
864 for (; outX < renderer->end; ++outX) { \
865 uint32_t* pixel = &renderer->row[outX]; \
866 BACKGROUND_DRAW_PIXEL_16(BLEND, OBJWIN); \
867 } \
868 } else { \
869 tileData >>= 4 * (0x8 - mod8); \
870 int end2 = renderer->end - 8; \
871 if (end2 < -1) { \
872 end2 = -1; \
873 } \
874 for (outX = renderer->end - 1; outX > end2; --outX) { \
875 uint32_t* pixel = &renderer->row[outX]; \
876 BACKGROUND_DRAW_PIXEL_16(BLEND, OBJWIN); \
877 } \
878 }
879
880#define DRAW_BACKGROUND_MODE_0_MOSAIC_16(BLEND, OBJWIN) \
881 for (; tileX < tileEnd; ++tileX) { \
882 BACKGROUND_TEXT_SELECT_CHARACTER; \
883 charBase = ((background->charBase + (GBA_TEXT_MAP_TILE(mapData) << 5)) >> 2) + localY; \
884 tileData = carryData; \
885 for (x = 0; x < 8; ++x) { \
886 if (!mosaicWait) { \
887 paletteData = GBA_TEXT_MAP_PALETTE(mapData) << 4; \
888 palette = &mainPalette[paletteData]; \
889 tileData = ((uint32_t*)renderer->d.vram)[charBase]; \
890 if (!GBA_TEXT_MAP_HFLIP(mapData)) { \
891 tileData >>= x * 4; \
892 } else { \
893 tileData >>= (7 - x) * 4; \
894 } \
895 tileData &= 0xF; \
896 tileData |= tileData << 4; \
897 tileData |= tileData << 8; \
898 tileData |= tileData << 12; \
899 tileData |= tileData << 16; \
900 tileData |= tileData << 20; \
901 tileData |= tileData << 24; \
902 tileData |= tileData << 28; \
903 carryData = tileData; \
904 mosaicWait = mosaicH; \
905 } \
906 --mosaicWait; \
907 BACKGROUND_DRAW_PIXEL_16(BLEND, OBJWIN); \
908 ++pixel; \
909 } \
910 }
911
912#define DRAW_BACKGROUND_MODE_0_TILES_16(BLEND, OBJWIN) \
913 for (; tileX < tileEnd; ++tileX) { \
914 BACKGROUND_TEXT_SELECT_CHARACTER; \
915 paletteData = GBA_TEXT_MAP_PALETTE(mapData) << 4; \
916 palette = &mainPalette[paletteData]; \
917 charBase = ((background->charBase + (GBA_TEXT_MAP_TILE(mapData) << 5)) >> 2) + localY; \
918 tileData = ((uint32_t*)renderer->d.vram)[charBase]; \
919 if (tileData) { \
920 if (!GBA_TEXT_MAP_HFLIP(mapData)) { \
921 BACKGROUND_DRAW_PIXEL_16(BLEND, OBJWIN); \
922 ++pixel; \
923 BACKGROUND_DRAW_PIXEL_16(BLEND, OBJWIN); \
924 ++pixel; \
925 BACKGROUND_DRAW_PIXEL_16(BLEND, OBJWIN); \
926 ++pixel; \
927 BACKGROUND_DRAW_PIXEL_16(BLEND, OBJWIN); \
928 ++pixel; \
929 BACKGROUND_DRAW_PIXEL_16(BLEND, OBJWIN); \
930 ++pixel; \
931 BACKGROUND_DRAW_PIXEL_16(BLEND, OBJWIN); \
932 ++pixel; \
933 BACKGROUND_DRAW_PIXEL_16(BLEND, OBJWIN); \
934 ++pixel; \
935 BACKGROUND_DRAW_PIXEL_16(BLEND, OBJWIN); \
936 ++pixel; \
937 } else { \
938 pixel += 7; \
939 BACKGROUND_DRAW_PIXEL_16(BLEND, OBJWIN); \
940 --pixel; \
941 BACKGROUND_DRAW_PIXEL_16(BLEND, OBJWIN); \
942 --pixel; \
943 BACKGROUND_DRAW_PIXEL_16(BLEND, OBJWIN); \
944 --pixel; \
945 BACKGROUND_DRAW_PIXEL_16(BLEND, OBJWIN); \
946 --pixel; \
947 BACKGROUND_DRAW_PIXEL_16(BLEND, OBJWIN); \
948 --pixel; \
949 BACKGROUND_DRAW_PIXEL_16(BLEND, OBJWIN); \
950 --pixel; \
951 BACKGROUND_DRAW_PIXEL_16(BLEND, OBJWIN); \
952 --pixel; \
953 BACKGROUND_DRAW_PIXEL_16(BLEND, OBJWIN); \
954 pixel += 8; \
955 } \
956 } else { \
957 pixel += 8; \
958 } \
959 }
960
961#define DRAW_BACKGROUND_MODE_0_TILE_SUFFIX_256(BLEND, OBJWIN) \
962 /* TODO: hflip */ \
963 charBase = ((background->charBase + (GBA_TEXT_MAP_TILE(mapData) << 6)) >> 2) + (localY << 1); \
964 int end2 = end - 4; \
965 int shift = inX & 0x3; \
966 if (end2 > 0) { \
967 tileData = ((uint32_t*)renderer->d.vram)[charBase]; \
968 tileData >>= 8 * shift; \
969 shift = 0; \
970 for (; outX < end2; ++outX) { \
971 uint32_t* pixel = &renderer->row[outX]; \
972 BACKGROUND_DRAW_PIXEL_256(BLEND, OBJWIN); \
973 } \
974 } \
975 \
976 tileData = ((uint32_t*)renderer->d.vram)[charBase + 1]; \
977 tileData >>= 8 * shift; \
978 for (; outX < end; ++outX) { \
979 uint32_t* pixel = &renderer->row[outX]; \
980 BACKGROUND_DRAW_PIXEL_256(BLEND, OBJWIN); \
981 }
982
983#define DRAW_BACKGROUND_MODE_0_TILE_PREFIX_256(BLEND, OBJWIN) \
984 /* TODO: hflip */ \
985 charBase = ((background->charBase + (GBA_TEXT_MAP_TILE(mapData) << 6)) >> 2) + (localY << 1); \
986 outX = renderer->end - 8 + end; \
987 int end2 = 4 - end; \
988 if (end2 > 0) { \
989 tileData = ((uint32_t*)renderer->d.vram)[charBase]; \
990 for (; outX < renderer->end - end2; ++outX) { \
991 uint32_t* pixel = &renderer->row[outX]; \
992 BACKGROUND_DRAW_PIXEL_256(BLEND, OBJWIN); \
993 } \
994 ++charBase; \
995 } \
996 \
997 tileData = ((uint32_t*)renderer->d.vram)[charBase]; \
998 for (; outX < renderer->end; ++outX) { \
999 uint32_t* pixel = &renderer->row[outX]; \
1000 BACKGROUND_DRAW_PIXEL_256(BLEND, OBJWIN); \
1001 }
1002
1003#define DRAW_BACKGROUND_MODE_0_TILES_256(BLEND, OBJWIN) \
1004 for (; tileX < tileEnd; ++tileX) { \
1005 BACKGROUND_TEXT_SELECT_CHARACTER; \
1006 charBase = ((background->charBase + (GBA_TEXT_MAP_TILE(mapData) << 6)) >> 2) + (localY << 1); \
1007 if (!GBA_TEXT_MAP_HFLIP(mapData)) { \
1008 tileData = ((uint32_t*)renderer->d.vram)[charBase]; \
1009 if (tileData) { \
1010 BACKGROUND_DRAW_PIXEL_256(BLEND, OBJWIN); \
1011 ++pixel; \
1012 BACKGROUND_DRAW_PIXEL_256(BLEND, OBJWIN); \
1013 ++pixel; \
1014 BACKGROUND_DRAW_PIXEL_256(BLEND, OBJWIN); \
1015 ++pixel; \
1016 BACKGROUND_DRAW_PIXEL_256(BLEND, OBJWIN); \
1017 ++pixel; \
1018 } else { \
1019 pixel += 4; \
1020 } \
1021 tileData = ((uint32_t*)renderer->d.vram)[charBase + 1]; \
1022 if (tileData) { \
1023 BACKGROUND_DRAW_PIXEL_256(BLEND, OBJWIN); \
1024 ++pixel; \
1025 BACKGROUND_DRAW_PIXEL_256(BLEND, OBJWIN); \
1026 ++pixel; \
1027 BACKGROUND_DRAW_PIXEL_256(BLEND, OBJWIN); \
1028 ++pixel; \
1029 BACKGROUND_DRAW_PIXEL_256(BLEND, OBJWIN); \
1030 ++pixel; \
1031 } else { \
1032 pixel += 4; \
1033 } \
1034 } else { \
1035 uint32_t tileData = ((uint32_t*)renderer->d.vram)[charBase + 1]; \
1036 if (tileData) { \
1037 pixel += 3; \
1038 BACKGROUND_DRAW_PIXEL_256(BLEND, OBJWIN); \
1039 --pixel; \
1040 BACKGROUND_DRAW_PIXEL_256(BLEND, OBJWIN); \
1041 --pixel; \
1042 BACKGROUND_DRAW_PIXEL_256(BLEND, OBJWIN); \
1043 --pixel; \
1044 BACKGROUND_DRAW_PIXEL_256(BLEND, OBJWIN); \
1045 } \
1046 pixel += 4; \
1047 tileData = ((uint32_t*)renderer->d.vram)[charBase]; \
1048 if (tileData) { \
1049 pixel += 3; \
1050 BACKGROUND_DRAW_PIXEL_256(BLEND, OBJWIN); \
1051 --pixel; \
1052 BACKGROUND_DRAW_PIXEL_256(BLEND, OBJWIN); \
1053 --pixel; \
1054 BACKGROUND_DRAW_PIXEL_256(BLEND, OBJWIN); \
1055 --pixel; \
1056 BACKGROUND_DRAW_PIXEL_256(BLEND, OBJWIN); \
1057 } \
1058 pixel += 4; \
1059 } \
1060 }
1061
1062#define DRAW_BACKGROUND_MODE_0_MOSAIC_256(BLEND, OBJWIN) \
1063 for (; tileX < tileEnd; ++tileX) { \
1064 BACKGROUND_TEXT_SELECT_CHARACTER; \
1065 charBase = ((background->charBase + (GBA_TEXT_MAP_TILE(mapData) << 6)) >> 2) + (localY << 1); \
1066 tileData = carryData; \
1067 for (x = 0; x < 8; ++x) { \
1068 if (!mosaicWait) { \
1069 if (!GBA_TEXT_MAP_HFLIP(mapData)) { \
1070 if (x >= 4) { \
1071 tileData = ((uint32_t*)renderer->d.vram)[charBase + 1]; \
1072 tileData >>= (x - 4) * 8; \
1073 } else { \
1074 tileData = ((uint32_t*)renderer->d.vram)[charBase]; \
1075 tileData >>= x * 8; \
1076 } \
1077 } else { \
1078 if (x >= 4) { \
1079 tileData = ((uint32_t*)renderer->d.vram)[charBase]; \
1080 tileData >>= (7 - x) * 8; \
1081 } else { \
1082 tileData = ((uint32_t*)renderer->d.vram)[charBase + 1]; \
1083 tileData >>= (3 - x) * 8; \
1084 } \
1085 } \
1086 tileData &= 0xFF; \
1087 carryData = tileData; \
1088 mosaicWait = mosaicH; \
1089 } \
1090 tileData |= tileData << 8; \
1091 --mosaicWait; \
1092 BACKGROUND_DRAW_PIXEL_256(BLEND, OBJWIN); \
1093 ++pixel; \
1094 } \
1095 }
1096
1097#define DRAW_BACKGROUND_MODE_0(BPP, BLEND, OBJWIN) \
1098 if (inX & 0x7) { \
1099 int mod8 = inX & 0x7; \
1100 BACKGROUND_TEXT_SELECT_CHARACTER; \
1101 \
1102 int end = outX + 0x8 - mod8; \
1103 if (end > renderer->end) { \
1104 /* TODO: ensure tiles are properly aligned from this*/ \
1105 end = renderer->end; \
1106 } \
1107 DRAW_BACKGROUND_MODE_0_TILE_SUFFIX_ ## BPP (BLEND, OBJWIN) \
1108 } \
1109 if (inX & 0x7 || (renderer->end - renderer->start) & 0x7) { \
1110 tileX = tileEnd; \
1111 int pixelData; \
1112 int mod8 = (inX + renderer->end - renderer->start) & 0x7; \
1113 BACKGROUND_TEXT_SELECT_CHARACTER; \
1114 \
1115 int end = 0x8 - mod8; \
1116 UNUSED(end); \
1117 DRAW_BACKGROUND_MODE_0_TILE_PREFIX_ ## BPP (BLEND, OBJWIN) \
1118 \
1119 tileX = (inX & 0x7) != 0; \
1120 outX = renderer->start + tileX * 8 - (inX & 0x7); \
1121 } \
1122 \
1123 uint32_t* pixel = &renderer->row[outX]; \
1124 if (background->mosaic) { \
1125 int mosaicH = renderer->mosaic.bgH + 1; \
1126 int x; \
1127 int mosaicWait = outX % mosaicH; \
1128 int carryData = 0; \
1129 paletteData = 0; /* Quiets compiler warning */ \
1130 DRAW_BACKGROUND_MODE_0_MOSAIC_ ## BPP (BLEND, OBJWIN) \
1131 return; \
1132 } \
1133 \
1134 DRAW_BACKGROUND_MODE_0_TILES_ ## BPP (BLEND, OBJWIN)
1135
1136static void _drawBackgroundMode0(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* background, int y) {
1137 int inX = renderer->start + background->x;
1138 if (background->mosaic) {
1139 int mosaicV = renderer->mosaic.bgV + 1;
1140 y -= y % mosaicV;
1141 }
1142 int inY = y + background->y;
1143 uint16_t mapData;
1144
1145 unsigned yBase = inY & 0xF8;
1146 if (background->size == 2) {
1147 yBase += inY & 0x100;
1148 } else if (background->size == 3) {
1149 yBase += (inY & 0x100) << 1;
1150 }
1151 yBase = (background->screenBase >> 1) + (yBase << 2);
1152
1153 int localX;
1154 int localY;
1155
1156 unsigned xBase;
1157
1158 int flags = (background->priority << OFFSET_PRIORITY) | (background->index << OFFSET_INDEX) | FLAG_IS_BACKGROUND;
1159 flags |= FLAG_TARGET_1 * (background->target1 && renderer->blendEffect == BLEND_ALPHA);
1160 flags |= FLAG_TARGET_2 * background->target2;
1161
1162 uint32_t screenBase;
1163 uint32_t charBase;
1164 int variant = background->target1 && renderer->currentWindow.blendEnable && (renderer->blendEffect == BLEND_BRIGHTEN || renderer->blendEffect == BLEND_DARKEN);
1165 color_t* mainPalette = renderer->normalPalette;
1166 if (variant) {
1167 mainPalette = renderer->variantPalette;
1168 }
1169 color_t* palette = mainPalette;
1170 PREPARE_OBJWIN;
1171
1172 int outX = renderer->start;
1173
1174 uint32_t tileData;
1175 uint32_t current;
1176 int pixelData;
1177 int paletteData;
1178 int tileX = 0;
1179 int tileEnd = (renderer->end - renderer->start + (inX & 0x7)) >> 3;
1180
1181 if (!objwinSlowPath) {
1182 if (!(flags & FLAG_TARGET_2)) {
1183 if (!background->multipalette) {
1184 DRAW_BACKGROUND_MODE_0(16, NoBlend, NO_OBJWIN);
1185 } else {
1186 DRAW_BACKGROUND_MODE_0(256, NoBlend, NO_OBJWIN);
1187 }
1188 } else {
1189 if (!background->multipalette) {
1190 DRAW_BACKGROUND_MODE_0(16, Blend, NO_OBJWIN);
1191 } else {
1192 DRAW_BACKGROUND_MODE_0(256, Blend, NO_OBJWIN);
1193 }
1194 }
1195 } else {
1196 if (!(flags & FLAG_TARGET_2)) {
1197 if (!background->multipalette) {
1198 DRAW_BACKGROUND_MODE_0(16, NoBlend, OBJWIN);
1199 } else {
1200 DRAW_BACKGROUND_MODE_0(256, NoBlend, OBJWIN);
1201 }
1202 } else {
1203 if (!background->multipalette) {
1204 DRAW_BACKGROUND_MODE_0(16, Blend, OBJWIN);
1205 } else {
1206 DRAW_BACKGROUND_MODE_0(256, Blend, OBJWIN);
1207 }
1208 }
1209 }
1210}
1211
1212#define BACKGROUND_BITMAP_INIT \
1213 UNUSED(unused); \
1214 int32_t x = background->sx + (renderer->start - 1) * background->dx; \
1215 int32_t y = background->sy + (renderer->start - 1) * background->dy; \
1216 int32_t localX; \
1217 int32_t localY; \
1218 \
1219 int flags = (background->priority << OFFSET_PRIORITY) | (background->index << OFFSET_INDEX) | FLAG_IS_BACKGROUND; \
1220 flags |= FLAG_TARGET_1 * (background->target1 && renderer->blendEffect == BLEND_ALPHA); \
1221 flags |= FLAG_TARGET_2 * background->target2; \
1222 int variant = background->target1 && renderer->currentWindow.blendEnable && (renderer->blendEffect == BLEND_BRIGHTEN || renderer->blendEffect == BLEND_DARKEN); \
1223 color_t* palette = renderer->normalPalette; \
1224 if (variant) { \
1225 palette = renderer->variantPalette; \
1226 } \
1227 PREPARE_OBJWIN;
1228
1229#define BACKGROUND_BITMAP_ITERATE(W, H) \
1230 x += background->dx; \
1231 y += background->dy; \
1232 \
1233 if (x < 0 || y < 0 || (x >> 8) >= W || (y >> 8) >= H) { \
1234 continue; \
1235 } else { \
1236 localX = x; \
1237 localY = y; \
1238 }
1239
1240static void _drawBackgroundMode2(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* background, int unused) {
1241 int sizeAdjusted = 0x8000 << background->size;
1242
1243 BACKGROUND_BITMAP_INIT;
1244
1245 uint32_t screenBase = background->screenBase;
1246 uint32_t charBase = background->charBase;
1247 uint8_t mapData;
1248 uint8_t tileData;
1249
1250 int outX;
1251 uint32_t* pixel;
1252 for (outX = renderer->start, pixel = &renderer->row[outX]; outX < renderer->end; ++outX, ++pixel) {
1253 x += background->dx;
1254 y += background->dy;
1255
1256 if (background->overflow) {
1257 localX = x & (sizeAdjusted - 1);
1258 localY = y & (sizeAdjusted - 1);
1259 } else if ((x | y) & ~(sizeAdjusted - 1)) {
1260 continue;
1261 } else {
1262 localX = x;
1263 localY = y;
1264 }
1265 mapData = ((uint8_t*)renderer->d.vram)[screenBase + (localX >> 11) + (((localY >> 7) & 0x7F0) << background->size)];
1266 tileData = ((uint8_t*)renderer->d.vram)[charBase + (mapData << 6) + ((localY & 0x700) >> 5) + ((localX & 0x700) >> 8)];
1267
1268 uint32_t current = *pixel;
1269 if (tileData && IS_WRITABLE(current)) {
1270 if (!objwinSlowPath) {
1271 _compositeBlendNoObjwin(renderer, pixel, palette[tileData] | flags, current);
1272 } else if (objwinForceEnable || !(current & FLAG_OBJWIN) == objwinOnly) {
1273 color_t* currentPalette = (current & FLAG_OBJWIN) ? objwinPalette : palette;
1274 _compositeBlendObjwin(renderer, pixel, currentPalette[tileData] | flags, current);
1275 }
1276 }
1277 }
1278}
1279
1280static void _drawBackgroundMode3(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* background, int unused) {
1281 BACKGROUND_BITMAP_INIT;
1282
1283 uint32_t color;
1284
1285 int outX;
1286 uint32_t* pixel;
1287 for (outX = renderer->start, pixel = &renderer->row[outX]; outX < renderer->end; ++outX, ++pixel) {
1288 BACKGROUND_BITMAP_ITERATE(VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS);
1289
1290 color = ((uint16_t*)renderer->d.vram)[(localX >> 8) + (localY >> 8) * VIDEO_HORIZONTAL_PIXELS];
1291#ifndef COLOR_16_BIT
1292 unsigned color32;
1293 color32 = 0;
1294 color32 |= (color << 3) & 0xF8;
1295 color32 |= (color << 6) & 0xF800;
1296 color32 |= (color << 9) & 0xF80000;
1297 color = color32;
1298#endif
1299
1300 uint32_t current = *pixel;
1301 if (!objwinSlowPath || !(current & FLAG_OBJWIN) != objwinOnly) {
1302 if (!variant) {
1303 _compositeBlendObjwin(renderer, pixel, color | flags, current);
1304 } else if (renderer->blendEffect == BLEND_BRIGHTEN) {
1305 _compositeBlendObjwin(renderer, pixel, _brighten(color, renderer->bldy) | flags, current);
1306 } else if (renderer->blendEffect == BLEND_DARKEN) {
1307 _compositeBlendObjwin(renderer, pixel, _darken(color, renderer->bldy) | flags, current);
1308 }
1309 }
1310 }
1311}
1312
1313static void _drawBackgroundMode4(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* background, int unused) {
1314 BACKGROUND_BITMAP_INIT;
1315
1316 uint16_t color;
1317 uint32_t offset = 0;
1318 if (renderer->dispcnt.frameSelect) {
1319 offset = 0xA000;
1320 }
1321
1322 int outX;
1323 uint32_t* pixel;
1324 for (outX = renderer->start, pixel = &renderer->row[outX]; outX < renderer->end; ++outX, ++pixel) {
1325 BACKGROUND_BITMAP_ITERATE(VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS);
1326
1327 color = ((uint8_t*)renderer->d.vram)[offset + (localX >> 8) + (localY >> 8) * VIDEO_HORIZONTAL_PIXELS];
1328
1329 uint32_t current = *pixel;
1330 if (color && IS_WRITABLE(current)) {
1331 if (!objwinSlowPath) {
1332 _compositeBlendNoObjwin(renderer, pixel, palette[color] | flags, current);
1333 } else if (objwinForceEnable || !(current & FLAG_OBJWIN) == objwinOnly) {
1334 color_t* currentPalette = (current & FLAG_OBJWIN) ? objwinPalette : palette;
1335 _compositeBlendObjwin(renderer, pixel, currentPalette[color] | flags, current);
1336 }
1337 }
1338 }
1339}
1340
1341static void _drawBackgroundMode5(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* background, int unused) {
1342 BACKGROUND_BITMAP_INIT;
1343
1344 uint32_t color;
1345 uint32_t offset = 0;
1346 if (renderer->dispcnt.frameSelect) {
1347 offset = 0xA000;
1348 }
1349
1350 int outX;
1351 uint32_t* pixel;
1352 for (outX = renderer->start, pixel = &renderer->row[outX]; outX < renderer->end; ++outX, ++pixel) {
1353 BACKGROUND_BITMAP_ITERATE(160, 128);
1354
1355 color = ((uint16_t*)renderer->d.vram)[offset + (localX >> 8) + (localY >> 8) * 160];
1356#ifndef COLOR_16_BIT
1357 unsigned color32 = 0;
1358 color32 |= (color << 9) & 0xF80000;
1359 color32 |= (color << 3) & 0xF8;
1360 color32 |= (color << 6) & 0xF800;
1361 color = color32;
1362#endif
1363
1364 uint32_t current = *pixel;
1365 if (!objwinSlowPath || !(current & FLAG_OBJWIN) != objwinOnly) {
1366 if (!variant) {
1367 _compositeBlendObjwin(renderer, pixel, color | flags, current);
1368 } else if (renderer->blendEffect == BLEND_BRIGHTEN) {
1369 _compositeBlendObjwin(renderer, pixel, _brighten(color, renderer->bldy) | flags, current);
1370 } else if (renderer->blendEffect == BLEND_DARKEN) {
1371 _compositeBlendObjwin(renderer, pixel, _darken(color, renderer->bldy) | flags, current);
1372 }
1373 }
1374 }
1375}
1376
1377#define SPRITE_NORMAL_LOOP(DEPTH, TYPE) \
1378 SPRITE_YBASE_ ## DEPTH(inY); \
1379 for (; outX < condition; ++outX, inX += xOffset) { \
1380 if (!(renderer->row[outX] & FLAG_UNWRITTEN)) { \
1381 continue; \
1382 } \
1383 SPRITE_XBASE_ ## DEPTH(inX); \
1384 SPRITE_DRAW_PIXEL_ ## DEPTH ## _ ## TYPE(inX); \
1385 }
1386
1387#define SPRITE_MOSAIC_LOOP(DEPTH, TYPE) \
1388 SPRITE_YBASE_ ## DEPTH(inY); \
1389 if (outX % mosaicH) { \
1390 inX += (mosaicH - (outX % mosaicH)) * xOffset; \
1391 outX += mosaicH - (outX % mosaicH); \
1392 } \
1393 for (; outX < condition; ++outX, inX += xOffset) { \
1394 if (!(renderer->row[outX] & FLAG_UNWRITTEN)) { \
1395 continue; \
1396 } \
1397 int localX = inX - xOffset * (outX % mosaicH); \
1398 SPRITE_XBASE_ ## DEPTH(localX); \
1399 SPRITE_DRAW_PIXEL_ ## DEPTH ## _ ## TYPE(localX); \
1400 }
1401
1402#define SPRITE_TRANSFORMED_LOOP(DEPTH, TYPE) \
1403 int outX; \
1404 for (outX = x >= start ? x : start; outX < x + totalWidth && outX < end; ++outX) { \
1405 if (!(renderer->row[outX] & FLAG_UNWRITTEN)) { \
1406 continue; \
1407 } \
1408 int inX = outX - x; \
1409 int localX = ((mat->a * (inX - (totalWidth >> 1)) + mat->b * (inY - (totalHeight >> 1))) >> 8) + (width >> 1); \
1410 int localY = ((mat->c * (inX - (totalWidth >> 1)) + mat->d * (inY - (totalHeight >> 1))) >> 8) + (height >> 1); \
1411 \
1412 if (localX < 0 || localX >= width || localY < 0 || localY >= height) { \
1413 continue; \
1414 } \
1415 \
1416 SPRITE_YBASE_ ## DEPTH(localY); \
1417 SPRITE_XBASE_ ## DEPTH(localX); \
1418 SPRITE_DRAW_PIXEL_ ## DEPTH ## _ ## TYPE(localX); \
1419 }
1420
1421#define SPRITE_XBASE_16(localX) unsigned xBase = (localX & ~0x7) * 4 + ((localX >> 1) & 2);
1422#define SPRITE_YBASE_16(localY) unsigned yBase = (localY & ~0x7) * (renderer->dispcnt.objCharacterMapping ? width >> 1 : 0x80) + (localY & 0x7) * 4;
1423
1424#define SPRITE_DRAW_PIXEL_16_NORMAL(localX) \
1425 unsigned tileData = vramBase[((yBase + charBase + xBase) & 0x7FFF) >> 1]; \
1426 tileData = (tileData >> ((localX & 3) << 2)) & 0xF; \
1427 if (tileData && (renderer->spriteLayer[outX] & FLAG_ORDER_MASK) > flags) { \
1428 renderer->spriteLayer[outX] = palette[tileData] | flags; \
1429 }
1430
1431#define SPRITE_DRAW_PIXEL_16_OBJWIN(localX) \
1432 unsigned tileData = vramBase[((yBase + charBase + xBase) & 0x7FFF) >> 1]; \
1433 tileData = (tileData >> ((localX & 3) << 2)) & 0xF; \
1434 if (tileData) { \
1435 renderer->row[outX] |= FLAG_OBJWIN; \
1436 }
1437
1438#define SPRITE_XBASE_256(localX) unsigned xBase = (localX & ~0x7) * 8 + (localX & 6);
1439#define SPRITE_YBASE_256(localY) unsigned yBase = (localY & ~0x7) * (renderer->dispcnt.objCharacterMapping ? width : 0x80) + (localY & 0x7) * 8;
1440
1441#define SPRITE_DRAW_PIXEL_256_NORMAL(localX) \
1442 unsigned tileData = vramBase[((yBase + charBase + xBase) & 0x7FFF) >> 1]; \
1443 tileData = (tileData >> ((localX & 1) << 3)) & 0xFF; \
1444 if (tileData && (renderer->spriteLayer[outX] & FLAG_ORDER_MASK) > flags) { \
1445 renderer->spriteLayer[outX] = palette[tileData] | flags; \
1446 }
1447
1448#define SPRITE_DRAW_PIXEL_256_OBJWIN(localX) \
1449 unsigned tileData = vramBase[((yBase + charBase + xBase) & 0x7FFF) >> 1]; \
1450 tileData = (tileData >> ((localX & 1) << 3)) & 0xFF; \
1451 if (tileData) { \
1452 renderer->row[outX] |= FLAG_OBJWIN; \
1453 }
1454
1455static int _preprocessSprite(struct GBAVideoSoftwareRenderer* renderer, struct GBAObj* sprite, int y) {
1456 int width = _objSizes[sprite->shape * 8 + sprite->size * 2];
1457 int height = _objSizes[sprite->shape * 8 + sprite->size * 2 + 1];
1458 int start = renderer->start;
1459 int end = renderer->end;
1460 uint32_t flags = sprite->priority << OFFSET_PRIORITY;
1461 flags |= FLAG_TARGET_1 * ((renderer->currentWindow.blendEnable && renderer->target1Obj && renderer->blendEffect == BLEND_ALPHA) || sprite->mode == OBJ_MODE_SEMITRANSPARENT);
1462 flags |= FLAG_OBJWIN * (sprite->mode == OBJ_MODE_OBJWIN);
1463 int x = sprite->x;
1464 uint16_t* vramBase = &renderer->d.vram[BASE_TILE >> 1];
1465 unsigned charBase = sprite->tile * 0x20;
1466 int variant = renderer->target1Obj && renderer->currentWindow.blendEnable && (renderer->blendEffect == BLEND_BRIGHTEN || renderer->blendEffect == BLEND_DARKEN);
1467 if (sprite->mode == OBJ_MODE_SEMITRANSPARENT && renderer->target2Bd) {
1468 // Hack: if a sprite is blended, then the variant palette is not used, but we don't know if it's blended in advance
1469 variant = 0;
1470 }
1471 color_t* palette = &renderer->normalPalette[0x100];
1472 if (variant) {
1473 palette = &renderer->variantPalette[0x100];
1474 }
1475
1476 int outX = x >= start ? x : start;
1477 int condition = x + width;
1478 int mosaicH = 1;
1479 if (sprite->mosaic) {
1480 mosaicH = renderer->mosaic.objH + 1;
1481 if (condition % mosaicH) {
1482 condition += mosaicH - (condition % mosaicH);
1483 }
1484 }
1485 int inY = y - sprite->y;
1486 if (sprite->y + height - 256 >= 0) {
1487 inY += 256;
1488 }
1489 if (sprite->vflip) {
1490 inY = height - inY - 1;
1491 }
1492 if (end < condition) {
1493 condition = end;
1494 }
1495 int inX = outX - x;
1496 int xOffset = 1;
1497 if (sprite->hflip) {
1498 inX = width - inX - 1;
1499 xOffset = -1;
1500 }
1501 if (!sprite->multipalette) {
1502 palette = &palette[sprite->palette << 4];
1503 if (flags & FLAG_OBJWIN) {
1504 SPRITE_NORMAL_LOOP(16, OBJWIN);
1505 } else if (sprite->mosaic) {
1506 SPRITE_MOSAIC_LOOP(16, NORMAL);
1507 } else {
1508 SPRITE_NORMAL_LOOP(16, NORMAL);
1509 }
1510 } else {
1511 if (flags & FLAG_OBJWIN) {
1512 SPRITE_NORMAL_LOOP(256, OBJWIN);
1513 } else if (sprite->mosaic) {
1514 SPRITE_MOSAIC_LOOP(256, NORMAL);
1515 } else {
1516 SPRITE_NORMAL_LOOP(256, NORMAL);
1517 }
1518 }
1519 return 1;
1520}
1521
1522static int _preprocessTransformedSprite(struct GBAVideoSoftwareRenderer* renderer, struct GBATransformedObj* sprite, int y) {
1523 int width = _objSizes[sprite->shape * 8 + sprite->size * 2];
1524 int height = _objSizes[sprite->shape * 8 + sprite->size * 2 + 1];
1525 int totalWidth = width << sprite->doublesize;
1526 int totalHeight = height << sprite->doublesize;
1527 int start = renderer->start;
1528 int end = renderer->end;
1529 uint32_t flags = sprite->priority << OFFSET_PRIORITY;
1530 flags |= FLAG_TARGET_1 * ((renderer->currentWindow.blendEnable && renderer->target1Obj && renderer->blendEffect == BLEND_ALPHA) || sprite->mode == OBJ_MODE_SEMITRANSPARENT);
1531 flags |= FLAG_OBJWIN * (sprite->mode == OBJ_MODE_OBJWIN);
1532 int x = sprite->x;
1533 uint16_t* vramBase = &renderer->d.vram[BASE_TILE >> 1];
1534 unsigned charBase = sprite->tile * 0x20;
1535 struct GBAOAMMatrix* mat = &renderer->d.oam->mat[sprite->matIndex];
1536 int variant = renderer->target1Obj && renderer->currentWindow.blendEnable && (renderer->blendEffect == BLEND_BRIGHTEN || renderer->blendEffect == BLEND_DARKEN);
1537 if (sprite->mode == OBJ_MODE_SEMITRANSPARENT && renderer->target2Bd) {
1538 // Hack: if a sprite is blended, then the variant palette is not used, but we don't know if it's blended in advance
1539 variant = 0;
1540 }
1541 color_t* palette = &renderer->normalPalette[0x100];
1542 if (variant) {
1543 palette = &renderer->variantPalette[0x100];
1544 }
1545 int inY = y - sprite->y;
1546 if (inY < 0) {
1547 inY += 256;
1548 }
1549 if (!sprite->multipalette) {
1550 palette = &palette[sprite->palette << 4];
1551 if (flags & FLAG_OBJWIN) {
1552 SPRITE_TRANSFORMED_LOOP(16, OBJWIN);
1553 } else {
1554 SPRITE_TRANSFORMED_LOOP(16, NORMAL);
1555 }
1556 } else {
1557 if (flags & FLAG_OBJWIN) {
1558 SPRITE_TRANSFORMED_LOOP(256, OBJWIN);
1559 } else {
1560 SPRITE_TRANSFORMED_LOOP(256, NORMAL);
1561 }
1562 }
1563 return 1;
1564}
1565
1566static void _postprocessSprite(struct GBAVideoSoftwareRenderer* renderer, unsigned priority) {
1567 int x;
1568 uint32_t* pixel = renderer->row;
1569 uint32_t flags = FLAG_TARGET_2 * renderer->target2Obj;
1570
1571 int objwinSlowPath = renderer->dispcnt.objwinEnable;
1572 int objwinDisable = 0;
1573 if (objwinSlowPath) {
1574 objwinDisable = !renderer->objwin.objEnable;
1575 }
1576 if (objwinSlowPath && objwinDisable) {
1577 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x, ++pixel) {
1578 uint32_t color = renderer->spriteLayer[x] & ~FLAG_OBJWIN;
1579 uint32_t current = *pixel;
1580 if ((color & FLAG_UNWRITTEN) != FLAG_UNWRITTEN && !(current & FLAG_OBJWIN) && (color & FLAG_PRIORITY) >> OFFSET_PRIORITY == priority) {
1581 _compositeBlendObjwin(renderer, pixel, color | flags, current);
1582 }
1583 }
1584 } else {
1585 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x, ++pixel) {
1586 uint32_t color = renderer->spriteLayer[x] & ~FLAG_OBJWIN;
1587 uint32_t current = *pixel;
1588 if ((color & FLAG_UNWRITTEN) != FLAG_UNWRITTEN && (color & FLAG_PRIORITY) >> OFFSET_PRIORITY == priority) {
1589 _compositeBlendNoObjwin(renderer, pixel, color | flags, current);
1590 }
1591 }
1592 }
1593}
1594
1595static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
1596 int i;
1597 if (renderer->blendEffect == BLEND_BRIGHTEN) {
1598 for (i = 0; i < 512; ++i) {
1599 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
1600 }
1601 } else if (renderer->blendEffect == BLEND_DARKEN) {
1602 for (i = 0; i < 512; ++i) {
1603 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
1604 }
1605 } else {
1606 for (i = 0; i < 512; ++i) {
1607 renderer->variantPalette[i] = renderer->normalPalette[i];
1608 }
1609 }
1610}
1611
1612static inline unsigned _brighten(unsigned color, int y) {
1613 unsigned c = 0;
1614 unsigned a;
1615#ifdef COLOR_16_BIT
1616 a = color & 0x1F;
1617 c |= (a + ((0x1F - a) * y) / 16) & 0x1F;
1618
1619#ifdef COLOR_5_6_5
1620 a = color & 0x7C0;
1621 c |= (a + ((0x7C0 - a) * y) / 16) & 0x7C0;
1622
1623 a = color & 0xF800;
1624 c |= (a + ((0xF800 - a) * y) / 16) & 0xF800;
1625#else
1626 a = color & 0x3E0;
1627 c |= (a + ((0x3E0 - a) * y) / 16) & 0x3E0;
1628
1629 a = color & 0x7C00;
1630 c |= (a + ((0x7C00 - a) * y) / 16) & 0x7C00;
1631#endif
1632#else
1633 a = color & 0xF8;
1634 c |= (a + ((0xF8 - a) * y) / 16) & 0xF8;
1635
1636 a = color & 0xF800;
1637 c |= (a + ((0xF800 - a) * y) / 16) & 0xF800;
1638
1639 a = color & 0xF80000;
1640 c |= (a + ((0xF80000 - a) * y) / 16) & 0xF80000;
1641#endif
1642 return c;
1643}
1644
1645static inline unsigned _darken(unsigned color, int y) {
1646 unsigned c = 0;
1647 unsigned a;
1648#ifdef COLOR_16_BIT
1649 a = color & 0x1F;
1650 c |= (a - (a * y) / 16) & 0x1F;
1651
1652#ifdef COLOR_5_6_5
1653 a = color & 0x7C0;
1654 c |= (a - (a * y) / 16) & 0x7C0;
1655
1656 a = color & 0xF800;
1657 c |= (a - (a * y) / 16) & 0xF800;
1658#else
1659 a = color & 0x3E0;
1660 c |= (a - (a * y) / 16) & 0x3E0;
1661
1662 a = color & 0x7C00;
1663 c |= (a - (a * y) / 16) & 0x7C00;
1664#endif
1665#else
1666 a = color & 0xF8;
1667 c |= (a - (a * y) / 16) & 0xF8;
1668
1669 a = color & 0xF800;
1670 c |= (a - (a * y) / 16) & 0xF800;
1671
1672 a = color & 0xF80000;
1673 c |= (a - (a * y) / 16) & 0xF80000;
1674#endif
1675 return c;
1676}
1677
1678static unsigned _mix(int weightA, unsigned colorA, int weightB, unsigned colorB) {
1679 unsigned c = 0;
1680 unsigned a, b;
1681#ifdef COLOR_16_BIT
1682#ifdef COLOR_5_6_5
1683 a = colorA & 0xF81F;
1684 b = colorB & 0xF81F;
1685 a |= (colorA & 0x7C0) << 16;
1686 b |= (colorB & 0x7C0) << 16;
1687 c = ((a * weightA + b * weightB) / 16);
1688 if (c & 0x08000000) {
1689 c = (c & ~0x0FC00000) | 0x07C00000;
1690 }
1691 if (c & 0x0020) {
1692 c = (c & ~0x003F) | 0x001F;
1693 }
1694 if (c & 0x10000) {
1695 c = (c & ~0x1F800) | 0xF800;
1696 }
1697 c = (c & 0xF81F) | ((c >> 16) & 0x07C0);
1698#else
1699 a = colorA & 0x7C1F;
1700 b = colorB & 0x7C1F;
1701 a |= (colorA & 0x3E0) << 16;
1702 b |= (colorB & 0x3E0) << 16;
1703 c = ((a * weightA + b * weightB) / 16);
1704 if (c & 0x04000000) {
1705 c = (c & ~0x07E00000) | 0x03E00000;
1706 }
1707 if (c & 0x0020) {
1708 c = (c & ~0x003F) | 0x001F;
1709 }
1710 if (c & 0x10000) {
1711 c = (c & ~0x1F800) | 0xF800;
1712 }
1713 c = (c & 0x7C1F) | ((c >> 16) & 0x03E0);
1714#endif
1715#else
1716 a = colorA & 0xF8;
1717 b = colorB & 0xF8;
1718 c |= ((a * weightA + b * weightB) / 16) & 0x1F8;
1719 if (c & 0x00000100) {
1720 c = 0x000000F8;
1721 }
1722
1723 a = colorA & 0xF800;
1724 b = colorB & 0xF800;
1725 c |= ((a * weightA + b * weightB) / 16) & 0x1F800;
1726 if (c & 0x00010000) {
1727 c = (c & 0x000000F8) | 0x0000F800;
1728 }
1729
1730 a = colorA & 0xF80000;
1731 b = colorB & 0xF80000;
1732 c |= ((a * weightA + b * weightB) / 16) & 0x1F80000;
1733 if (c & 0x01000000) {
1734 c = (c & 0x0000F8F8) | 0x00F80000;
1735 }
1736#endif
1737 return c;
1738}