src/gba/renderers/video-software.c (view raw)
1/* Copyright (c) 2013-2015 Jeffrey Pfau
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6#include "software-private.h"
7
8#include "core/tile-cache.h"
9#include "gba/gba.h"
10#include "gba/io.h"
11#include "gba/renderers/tile-cache.h"
12
13#include "util/arm-algo.h"
14#include "util/memory.h"
15
16static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer);
17static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer);
18static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer);
19static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address);
20static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam);
21static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
22static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
23static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y);
24static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer);
25static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels);
26static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels);
27
28static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer);
29static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value);
30static void GBAVideoSoftwareRendererWriteBGPA(struct GBAVideoSoftwareBackground* bg, uint16_t value);
31static void GBAVideoSoftwareRendererWriteBGPB(struct GBAVideoSoftwareBackground* bg, uint16_t value);
32static void GBAVideoSoftwareRendererWriteBGPC(struct GBAVideoSoftwareBackground* bg, uint16_t value);
33static void GBAVideoSoftwareRendererWriteBGPD(struct GBAVideoSoftwareBackground* bg, uint16_t value);
34static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value);
35static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value);
36static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value);
37static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value);
38static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value);
39
40static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer);
41static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y);
42
43static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer);
44
45static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y);
46static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win);
47
48void GBAVideoSoftwareRendererCreate(struct GBAVideoSoftwareRenderer* renderer) {
49 renderer->d.init = GBAVideoSoftwareRendererInit;
50 renderer->d.reset = GBAVideoSoftwareRendererReset;
51 renderer->d.deinit = GBAVideoSoftwareRendererDeinit;
52 renderer->d.writeVideoRegister = GBAVideoSoftwareRendererWriteVideoRegister;
53 renderer->d.writeVRAM = GBAVideoSoftwareRendererWriteVRAM;
54 renderer->d.writeOAM = GBAVideoSoftwareRendererWriteOAM;
55 renderer->d.writePalette = GBAVideoSoftwareRendererWritePalette;
56 renderer->d.drawScanline = GBAVideoSoftwareRendererDrawScanline;
57 renderer->d.finishFrame = GBAVideoSoftwareRendererFinishFrame;
58 renderer->d.getPixels = GBAVideoSoftwareRendererGetPixels;
59 renderer->d.putPixels = GBAVideoSoftwareRendererPutPixels;
60
61 renderer->d.disableBG[0] = false;
62 renderer->d.disableBG[1] = false;
63 renderer->d.disableBG[2] = false;
64 renderer->d.disableBG[3] = false;
65 renderer->d.disableOBJ = false;
66
67 renderer->temporaryBuffer = 0;
68}
69
70static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer) {
71 GBAVideoSoftwareRendererReset(renderer);
72
73 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
74
75 int y;
76 for (y = 0; y < VIDEO_VERTICAL_PIXELS; ++y) {
77 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
78 int x;
79 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
80 row[x] = GBA_COLOR_WHITE;
81 }
82 }
83}
84
85static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer) {
86 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
87 int i;
88
89 softwareRenderer->dispcnt = 0x0080;
90
91 softwareRenderer->target1Obj = 0;
92 softwareRenderer->target1Bd = 0;
93 softwareRenderer->target2Obj = 0;
94 softwareRenderer->target2Bd = 0;
95 softwareRenderer->blendEffect = BLEND_NONE;
96 for (i = 0; i < 1024; i += 2) {
97 uint16_t entry;
98 LOAD_16(entry, i, softwareRenderer->d.palette);
99 GBAVideoSoftwareRendererWritePalette(renderer, i, entry);
100 }
101 _updatePalettes(softwareRenderer);
102
103 softwareRenderer->blda = 0;
104 softwareRenderer->bldb = 0;
105 softwareRenderer->bldy = 0;
106
107 softwareRenderer->winN[0] = (struct WindowN) { .control = { .priority = 0 } };
108 softwareRenderer->winN[1] = (struct WindowN) { .control = { .priority = 1 } };
109 softwareRenderer->objwin = (struct WindowControl) { .priority = 2 };
110 softwareRenderer->winout = (struct WindowControl) { .priority = 3 };
111 softwareRenderer->oamMax = 0;
112
113 softwareRenderer->mosaic = 0;
114
115 for (i = 0; i < 4; ++i) {
116 struct GBAVideoSoftwareBackground* bg = &softwareRenderer->bg[i];
117 bg->index = i;
118 bg->enabled = 0;
119 bg->priority = 0;
120 bg->charBase = 0;
121 bg->mosaic = 0;
122 bg->multipalette = 0;
123 bg->screenBase = 0;
124 bg->overflow = 0;
125 bg->size = 0;
126 bg->target1 = 0;
127 bg->target2 = 0;
128 bg->x = 0;
129 bg->y = 0;
130 bg->refx = 0;
131 bg->refy = 0;
132 bg->dx = 256;
133 bg->dmx = 0;
134 bg->dy = 0;
135 bg->dmy = 256;
136 bg->sx = 0;
137 bg->sy = 0;
138 }
139}
140
141static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer) {
142 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
143 UNUSED(softwareRenderer);
144}
145
146static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
147 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
148 switch (address) {
149 case REG_DISPCNT:
150 softwareRenderer->dispcnt = value;
151 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
152 break;
153 case REG_BG0CNT:
154 value &= 0xDFFF;
155 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
156 break;
157 case REG_BG1CNT:
158 value &= 0xDFFF;
159 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
160 break;
161 case REG_BG2CNT:
162 value &= 0xFFFF;
163 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
164 break;
165 case REG_BG3CNT:
166 value &= 0xFFFF;
167 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
168 break;
169 case REG_BG0HOFS:
170 value &= 0x01FF;
171 softwareRenderer->bg[0].x = value;
172 break;
173 case REG_BG0VOFS:
174 value &= 0x01FF;
175 softwareRenderer->bg[0].y = value;
176 break;
177 case REG_BG1HOFS:
178 value &= 0x01FF;
179 softwareRenderer->bg[1].x = value;
180 break;
181 case REG_BG1VOFS:
182 value &= 0x01FF;
183 softwareRenderer->bg[1].y = value;
184 break;
185 case REG_BG2HOFS:
186 value &= 0x01FF;
187 softwareRenderer->bg[2].x = value;
188 break;
189 case REG_BG2VOFS:
190 value &= 0x01FF;
191 softwareRenderer->bg[2].y = value;
192 break;
193 case REG_BG3HOFS:
194 value &= 0x01FF;
195 softwareRenderer->bg[3].x = value;
196 break;
197 case REG_BG3VOFS:
198 value &= 0x01FF;
199 softwareRenderer->bg[3].y = value;
200 break;
201 case REG_BG2PA:
202 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[2], value);
203 break;
204 case REG_BG2PB:
205 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[2], value);
206 break;
207 case REG_BG2PC:
208 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[2], value);
209 break;
210 case REG_BG2PD:
211 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[2], value);
212 break;
213 case REG_BG2X_LO:
214 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[2], value);
215 break;
216 case REG_BG2X_HI:
217 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[2], value);
218 break;
219 case REG_BG2Y_LO:
220 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[2], value);
221 break;
222 case REG_BG2Y_HI:
223 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[2], value);
224 break;
225 case REG_BG3PA:
226 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[3], value);
227 break;
228 case REG_BG3PB:
229 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[3], value);
230 break;
231 case REG_BG3PC:
232 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[3], value);
233 break;
234 case REG_BG3PD:
235 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[3], value);
236 break;
237 case REG_BG3X_LO:
238 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[3], value);
239 break;
240 case REG_BG3X_HI:
241 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[3], value);
242 break;
243 case REG_BG3Y_LO:
244 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[3], value);
245 break;
246 case REG_BG3Y_HI:
247 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[3], value);
248 break;
249 case REG_BLDCNT:
250 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
251 value &= 0x3FFF;
252 break;
253 case REG_BLDALPHA:
254 softwareRenderer->blda = value & 0x1F;
255 if (softwareRenderer->blda > 0x10) {
256 softwareRenderer->blda = 0x10;
257 }
258 softwareRenderer->bldb = (value >> 8) & 0x1F;
259 if (softwareRenderer->bldb > 0x10) {
260 softwareRenderer->bldb = 0x10;
261 }
262 value &= 0x1F1F;
263 break;
264 case REG_BLDY:
265 softwareRenderer->bldy = value & 0x1F;
266 if (softwareRenderer->bldy > 0x10) {
267 softwareRenderer->bldy = 0x10;
268 }
269 _updatePalettes(softwareRenderer);
270 break;
271 case REG_WIN0H:
272 softwareRenderer->winN[0].h.end = value;
273 softwareRenderer->winN[0].h.start = value >> 8;
274 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end) {
275 softwareRenderer->winN[0].h.start = 0;
276 }
277 if (softwareRenderer->winN[0].h.end > VIDEO_HORIZONTAL_PIXELS) {
278 softwareRenderer->winN[0].h.end = VIDEO_HORIZONTAL_PIXELS;
279 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS) {
280 softwareRenderer->winN[0].h.start = VIDEO_HORIZONTAL_PIXELS;
281 }
282 }
283 break;
284 case REG_WIN1H:
285 softwareRenderer->winN[1].h.end = value;
286 softwareRenderer->winN[1].h.start = value >> 8;
287 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end) {
288 softwareRenderer->winN[1].h.start = 0;
289 }
290 if (softwareRenderer->winN[1].h.end > VIDEO_HORIZONTAL_PIXELS) {
291 softwareRenderer->winN[1].h.end = VIDEO_HORIZONTAL_PIXELS;
292 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS) {
293 softwareRenderer->winN[1].h.start = VIDEO_HORIZONTAL_PIXELS;
294 }
295 }
296 break;
297 case REG_WIN0V:
298 softwareRenderer->winN[0].v.end = value;
299 softwareRenderer->winN[0].v.start = value >> 8;
300 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end) {
301 softwareRenderer->winN[0].v.start = 0;
302 }
303 if (softwareRenderer->winN[0].v.end > VIDEO_VERTICAL_PIXELS) {
304 softwareRenderer->winN[0].v.end = VIDEO_VERTICAL_PIXELS;
305 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS) {
306 softwareRenderer->winN[0].v.start = VIDEO_VERTICAL_PIXELS;
307 }
308 }
309 break;
310 case REG_WIN1V:
311 softwareRenderer->winN[1].v.end = value;
312 softwareRenderer->winN[1].v.start = value >> 8;
313 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end) {
314 softwareRenderer->winN[1].v.start = 0;
315 }
316 if (softwareRenderer->winN[1].v.end > VIDEO_VERTICAL_PIXELS) {
317 softwareRenderer->winN[1].v.end = VIDEO_VERTICAL_PIXELS;
318 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS) {
319 softwareRenderer->winN[1].v.start = VIDEO_VERTICAL_PIXELS;
320 }
321 }
322 break;
323 case REG_WININ:
324 value &= 0x3F3F;
325 softwareRenderer->winN[0].control.packed = value;
326 softwareRenderer->winN[1].control.packed = value >> 8;
327 break;
328 case REG_WINOUT:
329 value &= 0x3F3F;
330 softwareRenderer->winout.packed = value;
331 softwareRenderer->objwin.packed = value >> 8;
332 break;
333 case REG_MOSAIC:
334 softwareRenderer->mosaic = value;
335 break;
336 case REG_GREENSWP:
337 mLOG(GBA_VIDEO, STUB, "Stub video register write: 0x%03X", address);
338 break;
339 default:
340 mLOG(GBA_VIDEO, GAME_ERROR, "Invalid video register: 0x%03X", address);
341 }
342 return value;
343}
344
345static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
346 if (renderer->cache) {
347 mTileCacheWriteVRAM(renderer->cache, address);
348 }
349}
350
351static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
352 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
353 softwareRenderer->oamDirty = 1;
354 UNUSED(oam);
355}
356
357static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
358 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
359#ifdef COLOR_16_BIT
360#ifdef COLOR_5_6_5
361 unsigned color = 0;
362 color |= (value & 0x001F) << 11;
363 color |= (value & 0x03E0) << 1;
364 color |= (value & 0x7C00) >> 10;
365#else
366 unsigned color = value;
367#endif
368#else
369 unsigned color = 0;
370 color |= (value << 3) & 0xF8;
371 color |= (value << 6) & 0xF800;
372 color |= (value << 9) & 0xF80000;
373#endif
374 softwareRenderer->normalPalette[address >> 1] = color;
375 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
376 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
377 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
378 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
379 }
380 if (renderer->cache) {
381 mTileCacheWritePalette(renderer->cache, address);
382 }
383}
384
385static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
386 if (win->v.end >= win->v.start) {
387 if (y >= win->v.end) {
388 return;
389 }
390 if (y < win->v.start) {
391 return;
392 }
393 } else if (y >= win->v.end && y < win->v.start) {
394 return;
395 }
396 if (win->h.end > VIDEO_HORIZONTAL_PIXELS || win->h.end < win->h.start) {
397 struct WindowN splits[2] = { *win, *win };
398 splits[0].h.start = 0;
399 splits[1].h.end = VIDEO_HORIZONTAL_PIXELS;
400 _breakWindowInner(softwareRenderer, &splits[0]);
401 _breakWindowInner(softwareRenderer, &splits[1]);
402 } else {
403 _breakWindowInner(softwareRenderer, win);
404 }
405}
406
407static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
408 int activeWindow;
409 int startX = 0;
410 if (win->h.end > 0) {
411 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
412 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
413 // Insert a window before the end of the active window
414 struct Window oldWindow = softwareRenderer->windows[activeWindow];
415 if (win->h.start > startX) {
416 // And after the start of the active window
417 int nextWindow = softwareRenderer->nWindows;
418 ++softwareRenderer->nWindows;
419 for (; nextWindow > activeWindow; --nextWindow) {
420 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
421 }
422 softwareRenderer->windows[activeWindow].endX = win->h.start;
423 ++activeWindow;
424 }
425 softwareRenderer->windows[activeWindow].control = win->control;
426 softwareRenderer->windows[activeWindow].endX = win->h.end;
427 if (win->h.end >= oldWindow.endX) {
428 // Trim off extra windows we've overwritten
429 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
430 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
431 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write will occur");
432 return;
433 }
434 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
435 --softwareRenderer->nWindows;
436 }
437 } else {
438 ++activeWindow;
439 int nextWindow = softwareRenderer->nWindows;
440 ++softwareRenderer->nWindows;
441 for (; nextWindow > activeWindow; --nextWindow) {
442 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
443 }
444 softwareRenderer->windows[activeWindow] = oldWindow;
445 }
446 break;
447 }
448 startX = softwareRenderer->windows[activeWindow].endX;
449 }
450 }
451#ifdef DEBUG
452 if (softwareRenderer->nWindows > MAX_WINDOW) {
453 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write occurred!");
454 }
455#endif
456}
457
458static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer) {
459 int i;
460 int oamMax = 0;
461 int objwinMax = 0;
462 for (i = 0; i < 128; ++i) {
463 struct GBAObj obj;
464 LOAD_16(obj.a, 0, &renderer->d.oam->obj[i].a);
465 LOAD_16(obj.b, 0, &renderer->d.oam->obj[i].b);
466 LOAD_16(obj.c, 0, &renderer->d.oam->obj[i].c);
467 if (GBAObjAttributesAIsTransformed(obj.a) || !GBAObjAttributesAIsDisable(obj.a)) {
468 int height = GBAVideoObjSizes[GBAObjAttributesAGetShape(obj.a) * 4 + GBAObjAttributesBGetSize(obj.b)][1];
469 if (GBAObjAttributesAIsTransformed(obj.a)) {
470 height <<= GBAObjAttributesAGetDoubleSize(obj.a);
471 }
472 if (GBAObjAttributesAGetY(obj.a) < VIDEO_VERTICAL_PIXELS || GBAObjAttributesAGetY(obj.a) + height >= VIDEO_VERTICAL_TOTAL_PIXELS) {
473 if (GBAObjAttributesAGetMode(obj.a) == OBJ_MODE_OBJWIN) {
474 renderer->objwinSprites[objwinMax].y = GBAObjAttributesAGetY(obj.a);
475 renderer->objwinSprites[objwinMax].endY = GBAObjAttributesAGetY(obj.a) + height;
476 renderer->objwinSprites[objwinMax].obj = obj;
477 ++objwinMax;
478 } else {
479 renderer->sprites[oamMax].y = GBAObjAttributesAGetY(obj.a);
480 renderer->sprites[oamMax].endY = GBAObjAttributesAGetY(obj.a) + height;
481 renderer->sprites[oamMax].obj = obj;
482 ++oamMax;
483 }
484 }
485 }
486 }
487 renderer->oamMax = oamMax;
488 renderer->objwinMax = objwinMax;
489 renderer->oamDirty = 0;
490}
491
492static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
493 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
494
495 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
496 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
497 int x;
498 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
499 row[x] = GBA_COLOR_WHITE;
500 }
501 return;
502 }
503
504 int x;
505 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; x += 4) {
506 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
507 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
508 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
509 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
510 }
511
512 softwareRenderer->windows[0].endX = VIDEO_HORIZONTAL_PIXELS;
513 softwareRenderer->nWindows = 1;
514 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
515 softwareRenderer->windows[0].control = softwareRenderer->winout;
516 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
517 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
518 }
519 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
520 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
521 }
522 } else {
523 softwareRenderer->windows[0].control.packed = 0xFF;
524 }
525
526 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
527
528 int w;
529 x = 0;
530 for (w = 0; w < softwareRenderer->nWindows; ++w) {
531 // TOOD: handle objwin on backdrop
532 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
533 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
534 backdrop |= softwareRenderer->normalPalette[0];
535 } else {
536 backdrop |= softwareRenderer->variantPalette[0];
537 }
538 int end = softwareRenderer->windows[w].endX;
539 for (; x < end - 3; x += 4) {
540 softwareRenderer->row[x] = backdrop;
541 softwareRenderer->row[x + 1] = backdrop;
542 softwareRenderer->row[x + 2] = backdrop;
543 softwareRenderer->row[x + 3] = backdrop;
544 }
545 for (; x < end; ++x) {
546 softwareRenderer->row[x] = backdrop;
547 }
548 }
549
550 _drawScanline(softwareRenderer, y);
551
552 if (softwareRenderer->target2Bd) {
553 x = 0;
554 for (w = 0; w < softwareRenderer->nWindows; ++w) {
555 uint32_t backdrop = 0;
556 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
557 backdrop |= softwareRenderer->normalPalette[0];
558 } else {
559 backdrop |= softwareRenderer->variantPalette[0];
560 }
561 int end = softwareRenderer->windows[w].endX;
562 for (; x < end; ++x) {
563 uint32_t color = softwareRenderer->row[x];
564 if (color & FLAG_TARGET_1) {
565 softwareRenderer->row[x] = _mix(softwareRenderer->bldb, backdrop, softwareRenderer->blda, color);
566 }
567 }
568 }
569 }
570 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
571 x = 0;
572 for (w = 0; w < softwareRenderer->nWindows; ++w) {
573 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
574 continue;
575 }
576 int end = softwareRenderer->windows[w].endX;
577 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
578 for (; x < end; ++x) {
579 uint32_t color = softwareRenderer->row[x];
580 if ((color & 0xFF000000) == FLAG_REBLEND) {
581 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
582 }
583 }
584 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
585 for (; x < end; ++x) {
586 uint32_t color = softwareRenderer->row[x];
587 if ((color & 0xFF000000) == FLAG_REBLEND) {
588 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
589 }
590 }
591 }
592 }
593 }
594
595#ifdef COLOR_16_BIT
596#if defined(__ARM_NEON) && !defined(__APPLE__)
597 _to16Bit(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS);
598#else
599 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
600 row[x] = softwareRenderer->row[x];
601 }
602#endif
603#else
604 memcpy(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS * sizeof(*row));
605#endif
606}
607
608static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
609 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
610
611 if (softwareRenderer->temporaryBuffer) {
612 mappedMemoryFree(softwareRenderer->temporaryBuffer, VIDEO_HORIZONTAL_PIXELS * VIDEO_VERTICAL_PIXELS * 4);
613 softwareRenderer->temporaryBuffer = 0;
614 }
615 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
616 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
617 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
618 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
619}
620
621static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
622 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
623 *stride = softwareRenderer->outputBufferStride;
624 *pixels = softwareRenderer->outputBuffer;
625}
626
627static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
628 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
629
630 const color_t* colorPixels = pixels;
631 unsigned i;
632 for (i = 0; i < VIDEO_VERTICAL_PIXELS; ++i) {
633 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], VIDEO_HORIZONTAL_PIXELS * BYTES_PER_PIXEL);
634 }
635}
636
637static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
638 renderer->bg[0].enabled = GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt) && !renderer->d.disableBG[0];
639 renderer->bg[1].enabled = GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt) && !renderer->d.disableBG[1];
640 renderer->bg[2].enabled = GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt) && !renderer->d.disableBG[2];
641 renderer->bg[3].enabled = GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt) && !renderer->d.disableBG[3];
642}
643
644static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
645 UNUSED(renderer);
646 bg->priority = GBARegisterBGCNTGetPriority(value);
647 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
648 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
649 bg->multipalette = GBARegisterBGCNTGet256Color(value);
650 bg->screenBase = GBARegisterBGCNTGetScreenBase(value) << 11;
651 bg->overflow = GBARegisterBGCNTGetOverflow(value);
652 bg->size = GBARegisterBGCNTGetSize(value);
653}
654
655static void GBAVideoSoftwareRendererWriteBGPA(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
656 bg->dx = value;
657}
658
659static void GBAVideoSoftwareRendererWriteBGPB(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
660 bg->dmx = value;
661}
662
663static void GBAVideoSoftwareRendererWriteBGPC(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
664 bg->dy = value;
665}
666
667static void GBAVideoSoftwareRendererWriteBGPD(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
668 bg->dmy = value;
669}
670
671static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
672 bg->refx = (bg->refx & 0xFFFF0000) | value;
673 bg->sx = bg->refx;
674}
675
676static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
677 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
678 bg->refx <<= 4;
679 bg->refx >>= 4;
680 bg->sx = bg->refx;
681}
682
683static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
684 bg->refy = (bg->refy & 0xFFFF0000) | value;
685 bg->sy = bg->refy;
686}
687
688static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
689 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
690 bg->refy <<= 4;
691 bg->refy >>= 4;
692 bg->sy = bg->refy;
693}
694
695static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
696 enum BlendEffect oldEffect = renderer->blendEffect;
697
698 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
699 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
700 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
701 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
702 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
703 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
704 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
705 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
706
707 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
708 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
709 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
710 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
711 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
712
713 if (oldEffect != renderer->blendEffect) {
714 _updatePalettes(renderer);
715 }
716}
717
718#define TEST_LAYER_ENABLED(X) \
719 (renderer->bg[X].enabled && \
720 (GBAWindowControlIsBg ## X ## Enable(renderer->currentWindow.packed) || \
721 (GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt) && GBAWindowControlIsBg ## X ## Enable (renderer->objwin.packed))) && \
722 renderer->bg[X].priority == priority)
723
724static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y) {
725 int w;
726 renderer->end = 0;
727 int spriteLayers = 0;
728 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
729 if (renderer->oamDirty) {
730 _cleanOAM(renderer);
731 }
732 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
733 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
734 int mosaicY = y - (y % mosaicV);
735 for (w = 0; w < renderer->nWindows; ++w) {
736 renderer->start = renderer->end;
737 renderer->end = renderer->windows[w].endX;
738 renderer->currentWindow = renderer->windows[w].control;
739 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
740 continue;
741 }
742 int i;
743 int drawn;
744 for (i = 0; i < renderer->objwinMax; ++i) {
745 int localY = y;
746 if (renderer->spriteCyclesRemaining <= 0) {
747 break;
748 }
749 struct GBAVideoSoftwareSprite* sprite = &renderer->objwinSprites[i];
750 if (GBAObjAttributesAIsMosaic(sprite->obj.a)) {
751 localY = mosaicY;
752 }
753 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
754 continue;
755 }
756 GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, localY);
757 }
758 for (i = 0; i < renderer->oamMax; ++i) {
759 int localY = y;
760 if (renderer->spriteCyclesRemaining <= 0) {
761 break;
762 }
763 struct GBAVideoSoftwareSprite* sprite = &renderer->sprites[i];
764 if (GBAObjAttributesAIsMosaic(sprite->obj.a)) {
765 localY = mosaicY;
766 }
767 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
768 continue;
769 }
770 drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, localY);
771 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
772 }
773 }
774 }
775
776 unsigned priority;
777 for (priority = 0; priority < 4; ++priority) {
778 renderer->end = 0;
779 for (w = 0; w < renderer->nWindows; ++w) {
780 renderer->start = renderer->end;
781 renderer->end = renderer->windows[w].endX;
782 renderer->currentWindow = renderer->windows[w].control;
783 if (spriteLayers & (1 << priority)) {
784 GBAVideoSoftwareRendererPostprocessSprite(renderer, priority);
785 }
786 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
787 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[0], y);
788 }
789 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
790 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[1], y);
791 }
792 if (TEST_LAYER_ENABLED(2)) {
793 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
794 case 0:
795 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[2], y);
796 break;
797 case 1:
798 case 2:
799 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[2], y);
800 break;
801 case 3:
802 GBAVideoSoftwareRendererDrawBackgroundMode3(renderer, &renderer->bg[2], y);
803 break;
804 case 4:
805 GBAVideoSoftwareRendererDrawBackgroundMode4(renderer, &renderer->bg[2], y);
806 break;
807 case 5:
808 GBAVideoSoftwareRendererDrawBackgroundMode5(renderer, &renderer->bg[2], y);
809 break;
810 }
811 }
812 if (TEST_LAYER_ENABLED(3)) {
813 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
814 case 0:
815 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[3], y);
816 break;
817 case 2:
818 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[3], y);
819 break;
820 }
821 }
822 }
823 }
824 renderer->bg[2].sx += renderer->bg[2].dmx;
825 renderer->bg[2].sy += renderer->bg[2].dmy;
826 renderer->bg[3].sx += renderer->bg[3].dmx;
827 renderer->bg[3].sy += renderer->bg[3].dmy;
828}
829
830static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
831 int i;
832 if (renderer->blendEffect == BLEND_BRIGHTEN) {
833 for (i = 0; i < 512; ++i) {
834 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
835 }
836 } else if (renderer->blendEffect == BLEND_DARKEN) {
837 for (i = 0; i < 512; ++i) {
838 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
839 }
840 } else {
841 for (i = 0; i < 512; ++i) {
842 renderer->variantPalette[i] = renderer->normalPalette[i];
843 }
844 }
845}