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