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 "gba/renderers/software-private.h"
7
8#include <mgba/core/tile-cache.h>
9#include <mgba/internal/arm/macros.h>
10#include <mgba/internal/gba/io.h>
11
12#include <mgba-util/arm-algo.h>
13#include <mgba-util/memory.h>
14
15static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer);
16static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer);
17static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer);
18static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address);
19static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam);
20static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
21static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
22static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y);
23static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer);
24static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels);
25static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels);
26
27static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer);
28static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value);
29static void GBAVideoSoftwareRendererWriteBGPA(struct GBAVideoSoftwareBackground* bg, uint16_t value);
30static void GBAVideoSoftwareRendererWriteBGPB(struct GBAVideoSoftwareBackground* bg, uint16_t value);
31static void GBAVideoSoftwareRendererWriteBGPC(struct GBAVideoSoftwareBackground* bg, uint16_t value);
32static void GBAVideoSoftwareRendererWriteBGPD(struct GBAVideoSoftwareBackground* bg, uint16_t value);
33static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value);
34static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value);
35static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value);
36static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value);
37static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value);
38
39static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer);
40static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y);
41
42static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer);
43
44static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y);
45static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win);
46
47void GBAVideoSoftwareRendererCreate(struct GBAVideoSoftwareRenderer* renderer) {
48 renderer->d.init = GBAVideoSoftwareRendererInit;
49 renderer->d.reset = GBAVideoSoftwareRendererReset;
50 renderer->d.deinit = GBAVideoSoftwareRendererDeinit;
51 renderer->d.writeVideoRegister = GBAVideoSoftwareRendererWriteVideoRegister;
52 renderer->d.writeVRAM = GBAVideoSoftwareRendererWriteVRAM;
53 renderer->d.writeOAM = GBAVideoSoftwareRendererWriteOAM;
54 renderer->d.writePalette = GBAVideoSoftwareRendererWritePalette;
55 renderer->d.drawScanline = GBAVideoSoftwareRendererDrawScanline;
56 renderer->d.finishFrame = GBAVideoSoftwareRendererFinishFrame;
57 renderer->d.getPixels = GBAVideoSoftwareRendererGetPixels;
58 renderer->d.putPixels = GBAVideoSoftwareRendererPutPixels;
59
60 renderer->d.disableBG[0] = false;
61 renderer->d.disableBG[1] = false;
62 renderer->d.disableBG[2] = false;
63 renderer->d.disableBG[3] = false;
64 renderer->d.disableOBJ = false;
65
66 renderer->temporaryBuffer = 0;
67}
68
69static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer) {
70 GBAVideoSoftwareRendererReset(renderer);
71
72 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
73
74 int y;
75 for (y = 0; y < VIDEO_VERTICAL_PIXELS; ++y) {
76 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
77 int x;
78 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
79 row[x] = GBA_COLOR_WHITE;
80 }
81 }
82}
83
84static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer) {
85 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
86 int i;
87
88 softwareRenderer->dispcnt = 0x0080;
89
90 softwareRenderer->target1Obj = 0;
91 softwareRenderer->target1Bd = 0;
92 softwareRenderer->target2Obj = 0;
93 softwareRenderer->target2Bd = 0;
94 softwareRenderer->blendEffect = BLEND_NONE;
95 for (i = 0; i < 1024; i += 2) {
96 uint16_t entry;
97 LOAD_16(entry, i, softwareRenderer->d.palette);
98 GBAVideoSoftwareRendererWritePalette(renderer, i, entry);
99 }
100 softwareRenderer->blendDirty = false;
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 value &= 0xFFF7;
151 softwareRenderer->dispcnt = value;
152 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
153 break;
154 case REG_BG0CNT:
155 value &= 0xDFFF;
156 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
157 break;
158 case REG_BG1CNT:
159 value &= 0xDFFF;
160 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
161 break;
162 case REG_BG2CNT:
163 value &= 0xFFFF;
164 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
165 break;
166 case REG_BG3CNT:
167 value &= 0xFFFF;
168 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
169 break;
170 case REG_BG0HOFS:
171 value &= 0x01FF;
172 softwareRenderer->bg[0].x = value;
173 break;
174 case REG_BG0VOFS:
175 value &= 0x01FF;
176 softwareRenderer->bg[0].y = value;
177 break;
178 case REG_BG1HOFS:
179 value &= 0x01FF;
180 softwareRenderer->bg[1].x = value;
181 break;
182 case REG_BG1VOFS:
183 value &= 0x01FF;
184 softwareRenderer->bg[1].y = value;
185 break;
186 case REG_BG2HOFS:
187 value &= 0x01FF;
188 softwareRenderer->bg[2].x = value;
189 break;
190 case REG_BG2VOFS:
191 value &= 0x01FF;
192 softwareRenderer->bg[2].y = value;
193 break;
194 case REG_BG3HOFS:
195 value &= 0x01FF;
196 softwareRenderer->bg[3].x = value;
197 break;
198 case REG_BG3VOFS:
199 value &= 0x01FF;
200 softwareRenderer->bg[3].y = value;
201 break;
202 case REG_BG2PA:
203 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[2], value);
204 break;
205 case REG_BG2PB:
206 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[2], value);
207 break;
208 case REG_BG2PC:
209 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[2], value);
210 break;
211 case REG_BG2PD:
212 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[2], value);
213 break;
214 case REG_BG2X_LO:
215 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[2], value);
216 break;
217 case REG_BG2X_HI:
218 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[2], value);
219 break;
220 case REG_BG2Y_LO:
221 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[2], value);
222 break;
223 case REG_BG2Y_HI:
224 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[2], value);
225 break;
226 case REG_BG3PA:
227 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[3], value);
228 break;
229 case REG_BG3PB:
230 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[3], value);
231 break;
232 case REG_BG3PC:
233 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[3], value);
234 break;
235 case REG_BG3PD:
236 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[3], value);
237 break;
238 case REG_BG3X_LO:
239 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[3], value);
240 break;
241 case REG_BG3X_HI:
242 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[3], value);
243 break;
244 case REG_BG3Y_LO:
245 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[3], value);
246 break;
247 case REG_BG3Y_HI:
248 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[3], value);
249 break;
250 case REG_BLDCNT:
251 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
252 value &= 0x3FFF;
253 break;
254 case REG_BLDALPHA:
255 softwareRenderer->blda = value & 0x1F;
256 if (softwareRenderer->blda > 0x10) {
257 softwareRenderer->blda = 0x10;
258 }
259 softwareRenderer->bldb = (value >> 8) & 0x1F;
260 if (softwareRenderer->bldb > 0x10) {
261 softwareRenderer->bldb = 0x10;
262 }
263 value &= 0x1F1F;
264 break;
265 case REG_BLDY:
266 value &= 0x1F;
267 if (value > 0x10) {
268 value = 0x10;
269 }
270 if (softwareRenderer->bldy != value) {
271 softwareRenderer->bldy = value;
272 softwareRenderer->blendDirty = true;
273 }
274 break;
275 case REG_WIN0H:
276 softwareRenderer->winN[0].h.end = value;
277 softwareRenderer->winN[0].h.start = value >> 8;
278 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end) {
279 softwareRenderer->winN[0].h.start = 0;
280 }
281 if (softwareRenderer->winN[0].h.end > VIDEO_HORIZONTAL_PIXELS) {
282 softwareRenderer->winN[0].h.end = VIDEO_HORIZONTAL_PIXELS;
283 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS) {
284 softwareRenderer->winN[0].h.start = VIDEO_HORIZONTAL_PIXELS;
285 }
286 }
287 break;
288 case REG_WIN1H:
289 softwareRenderer->winN[1].h.end = value;
290 softwareRenderer->winN[1].h.start = value >> 8;
291 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end) {
292 softwareRenderer->winN[1].h.start = 0;
293 }
294 if (softwareRenderer->winN[1].h.end > VIDEO_HORIZONTAL_PIXELS) {
295 softwareRenderer->winN[1].h.end = VIDEO_HORIZONTAL_PIXELS;
296 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS) {
297 softwareRenderer->winN[1].h.start = VIDEO_HORIZONTAL_PIXELS;
298 }
299 }
300 break;
301 case REG_WIN0V:
302 softwareRenderer->winN[0].v.end = value;
303 softwareRenderer->winN[0].v.start = value >> 8;
304 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end) {
305 softwareRenderer->winN[0].v.start = 0;
306 }
307 if (softwareRenderer->winN[0].v.end > VIDEO_VERTICAL_PIXELS) {
308 softwareRenderer->winN[0].v.end = VIDEO_VERTICAL_PIXELS;
309 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS) {
310 softwareRenderer->winN[0].v.start = VIDEO_VERTICAL_PIXELS;
311 }
312 }
313 break;
314 case REG_WIN1V:
315 softwareRenderer->winN[1].v.end = value;
316 softwareRenderer->winN[1].v.start = value >> 8;
317 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end) {
318 softwareRenderer->winN[1].v.start = 0;
319 }
320 if (softwareRenderer->winN[1].v.end > VIDEO_VERTICAL_PIXELS) {
321 softwareRenderer->winN[1].v.end = VIDEO_VERTICAL_PIXELS;
322 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS) {
323 softwareRenderer->winN[1].v.start = VIDEO_VERTICAL_PIXELS;
324 }
325 }
326 break;
327 case REG_WININ:
328 value &= 0x3F3F;
329 softwareRenderer->winN[0].control.packed = value;
330 softwareRenderer->winN[1].control.packed = value >> 8;
331 break;
332 case REG_WINOUT:
333 value &= 0x3F3F;
334 softwareRenderer->winout.packed = value;
335 softwareRenderer->objwin.packed = value >> 8;
336 break;
337 case REG_MOSAIC:
338 softwareRenderer->mosaic = value;
339 break;
340 case REG_GREENSWP:
341 mLOG(GBA_VIDEO, STUB, "Stub video register write: 0x%03X", address);
342 break;
343 default:
344 mLOG(GBA_VIDEO, GAME_ERROR, "Invalid video register: 0x%03X", address);
345 }
346 return value;
347}
348
349static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
350 if (renderer->cache) {
351 mTileCacheWriteVRAM(renderer->cache, address);
352 }
353}
354
355static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
356 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
357 softwareRenderer->oamDirty = 1;
358 UNUSED(oam);
359}
360
361static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
362 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
363#ifdef COLOR_16_BIT
364#ifdef COLOR_5_6_5
365 unsigned color = 0;
366 color |= (value & 0x001F) << 11;
367 color |= (value & 0x03E0) << 1;
368 color |= (value & 0x7C00) >> 10;
369#else
370 unsigned color = value;
371#endif
372#else
373 unsigned color = 0;
374 color |= (value << 3) & 0xF8;
375 color |= (value << 6) & 0xF800;
376 color |= (value << 9) & 0xF80000;
377 color |= (color >> 5) & 0x070707;
378#endif
379 softwareRenderer->normalPalette[address >> 1] = color;
380 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
381 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
382 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
383 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
384 }
385 if (renderer->cache) {
386 mTileCacheWritePalette(renderer->cache, address);
387 }
388}
389
390static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
391 if (win->v.end >= win->v.start) {
392 if (y >= win->v.end) {
393 return;
394 }
395 if (y < win->v.start) {
396 return;
397 }
398 } else if (y >= win->v.end && y < win->v.start) {
399 return;
400 }
401 if (win->h.end > VIDEO_HORIZONTAL_PIXELS || win->h.end < win->h.start) {
402 struct WindowN splits[2] = { *win, *win };
403 splits[0].h.start = 0;
404 splits[1].h.end = VIDEO_HORIZONTAL_PIXELS;
405 _breakWindowInner(softwareRenderer, &splits[0]);
406 _breakWindowInner(softwareRenderer, &splits[1]);
407 } else {
408 _breakWindowInner(softwareRenderer, win);
409 }
410}
411
412static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
413 int activeWindow;
414 int startX = 0;
415 if (win->h.end > 0) {
416 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
417 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
418 // Insert a window before the end of the active window
419 struct Window oldWindow = softwareRenderer->windows[activeWindow];
420 if (win->h.start > startX) {
421 // And after the start of the active window
422 int nextWindow = softwareRenderer->nWindows;
423 ++softwareRenderer->nWindows;
424 for (; nextWindow > activeWindow; --nextWindow) {
425 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
426 }
427 softwareRenderer->windows[activeWindow].endX = win->h.start;
428 ++activeWindow;
429 }
430 softwareRenderer->windows[activeWindow].control = win->control;
431 softwareRenderer->windows[activeWindow].endX = win->h.end;
432 if (win->h.end >= oldWindow.endX) {
433 // Trim off extra windows we've overwritten
434 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
435 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
436 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write will occur");
437 return;
438 }
439 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
440 --softwareRenderer->nWindows;
441 }
442 } else {
443 ++activeWindow;
444 int nextWindow = softwareRenderer->nWindows;
445 ++softwareRenderer->nWindows;
446 for (; nextWindow > activeWindow; --nextWindow) {
447 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
448 }
449 softwareRenderer->windows[activeWindow] = oldWindow;
450 }
451 break;
452 }
453 startX = softwareRenderer->windows[activeWindow].endX;
454 }
455 }
456#ifdef DEBUG
457 if (softwareRenderer->nWindows > MAX_WINDOW) {
458 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write occurred!");
459 }
460#endif
461}
462
463static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer) {
464 int i;
465 int oamMax = 0;
466 for (i = 0; i < 128; ++i) {
467 struct GBAObj obj;
468 LOAD_16(obj.a, 0, &renderer->d.oam->obj[i].a);
469 LOAD_16(obj.b, 0, &renderer->d.oam->obj[i].b);
470 LOAD_16(obj.c, 0, &renderer->d.oam->obj[i].c);
471 if (GBAObjAttributesAIsTransformed(obj.a) || !GBAObjAttributesAIsDisable(obj.a)) {
472 int height = GBAVideoObjSizes[GBAObjAttributesAGetShape(obj.a) * 4 + GBAObjAttributesBGetSize(obj.b)][1];
473 if (GBAObjAttributesAIsTransformed(obj.a)) {
474 height <<= GBAObjAttributesAGetDoubleSize(obj.a);
475 }
476 if (GBAObjAttributesAGetY(obj.a) < VIDEO_VERTICAL_PIXELS || GBAObjAttributesAGetY(obj.a) + height >= VIDEO_VERTICAL_TOTAL_PIXELS) {
477 renderer->sprites[oamMax].y = GBAObjAttributesAGetY(obj.a);
478 renderer->sprites[oamMax].endY = GBAObjAttributesAGetY(obj.a) + height;
479 renderer->sprites[oamMax].obj = obj;
480 ++oamMax;
481 }
482 }
483 }
484 renderer->oamMax = oamMax;
485 renderer->oamDirty = 0;
486}
487
488static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
489 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
490
491 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
492 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
493 int x;
494 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
495 row[x] = GBA_COLOR_WHITE;
496 }
497 return;
498 }
499
500 int x;
501 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; x += 4) {
502 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
503 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
504 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
505 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
506 }
507
508 softwareRenderer->windows[0].endX = VIDEO_HORIZONTAL_PIXELS;
509 softwareRenderer->nWindows = 1;
510 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
511 softwareRenderer->windows[0].control = softwareRenderer->winout;
512 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
513 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
514 }
515 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
516 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
517 }
518 } else {
519 softwareRenderer->windows[0].control.packed = 0xFF;
520 }
521
522 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
523 if (softwareRenderer->blendDirty) {
524 _updatePalettes(softwareRenderer);
525 softwareRenderer->blendDirty = false;
526 }
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 uint32_t mask = FLAG_REBLEND | FLAG_TARGET_1 | FLAG_IS_BACKGROUND;
573 uint32_t match = FLAG_REBLEND;
574 if (GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
575 mask |= FLAG_OBJWIN;
576 if (GBAWindowControlIsBlendEnable(softwareRenderer->objwin.packed)) {
577 match |= FLAG_OBJWIN;
578 }
579 }
580 for (w = 0; w < softwareRenderer->nWindows; ++w) {
581 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
582 continue;
583 }
584 int end = softwareRenderer->windows[w].endX;
585 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
586 for (; x < end; ++x) {
587 uint32_t color = softwareRenderer->row[x];
588 if ((color & mask) == match) {
589 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
590 }
591 }
592 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
593 for (; x < end; ++x) {
594 uint32_t color = softwareRenderer->row[x];
595 if ((color & mask) == match) {
596 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
597 }
598 }
599 }
600 }
601 }
602
603#ifdef COLOR_16_BIT
604#if defined(__ARM_NEON) && !defined(__APPLE__)
605 _to16Bit(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS);
606#else
607 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
608 row[x] = softwareRenderer->row[x];
609 }
610#endif
611#else
612 memcpy(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS * sizeof(*row));
613#endif
614}
615
616static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
617 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
618
619 if (softwareRenderer->temporaryBuffer) {
620 mappedMemoryFree(softwareRenderer->temporaryBuffer, VIDEO_HORIZONTAL_PIXELS * VIDEO_VERTICAL_PIXELS * 4);
621 softwareRenderer->temporaryBuffer = 0;
622 }
623 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
624 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
625 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
626 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
627}
628
629static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
630 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
631 *stride = softwareRenderer->outputBufferStride;
632 *pixels = softwareRenderer->outputBuffer;
633}
634
635static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
636 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
637
638 const color_t* colorPixels = pixels;
639 unsigned i;
640 for (i = 0; i < VIDEO_VERTICAL_PIXELS; ++i) {
641 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], VIDEO_HORIZONTAL_PIXELS * BYTES_PER_PIXEL);
642 }
643}
644
645static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
646 renderer->bg[0].enabled = GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt) && !renderer->d.disableBG[0];
647 renderer->bg[1].enabled = GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt) && !renderer->d.disableBG[1];
648 renderer->bg[2].enabled = GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt) && !renderer->d.disableBG[2];
649 renderer->bg[3].enabled = GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt) && !renderer->d.disableBG[3];
650}
651
652static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
653 UNUSED(renderer);
654 bg->priority = GBARegisterBGCNTGetPriority(value);
655 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
656 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
657 bg->multipalette = GBARegisterBGCNTGet256Color(value);
658 bg->screenBase = GBARegisterBGCNTGetScreenBase(value) << 11;
659 bg->overflow = GBARegisterBGCNTGetOverflow(value);
660 bg->size = GBARegisterBGCNTGetSize(value);
661}
662
663static void GBAVideoSoftwareRendererWriteBGPA(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
664 bg->dx = value;
665}
666
667static void GBAVideoSoftwareRendererWriteBGPB(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
668 bg->dmx = value;
669}
670
671static void GBAVideoSoftwareRendererWriteBGPC(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
672 bg->dy = value;
673}
674
675static void GBAVideoSoftwareRendererWriteBGPD(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
676 bg->dmy = value;
677}
678
679static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
680 bg->refx = (bg->refx & 0xFFFF0000) | value;
681 bg->sx = bg->refx;
682}
683
684static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
685 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
686 bg->refx <<= 4;
687 bg->refx >>= 4;
688 bg->sx = bg->refx;
689}
690
691static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
692 bg->refy = (bg->refy & 0xFFFF0000) | value;
693 bg->sy = bg->refy;
694}
695
696static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
697 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
698 bg->refy <<= 4;
699 bg->refy >>= 4;
700 bg->sy = bg->refy;
701}
702
703static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
704 enum BlendEffect oldEffect = renderer->blendEffect;
705
706 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
707 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
708 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
709 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
710 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
711 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
712 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
713 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
714
715 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
716 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
717 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
718 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
719 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
720
721 if (oldEffect != renderer->blendEffect) {
722 renderer->blendDirty = true;
723 }
724}
725
726#define TEST_LAYER_ENABLED(X) \
727 (renderer->bg[X].enabled && \
728 (GBAWindowControlIsBg ## X ## Enable(renderer->currentWindow.packed) || \
729 (GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt) && GBAWindowControlIsBg ## X ## Enable (renderer->objwin.packed))) && \
730 renderer->bg[X].priority == priority)
731
732static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y) {
733 int w;
734 renderer->end = 0;
735 int spriteLayers = 0;
736 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
737 if (renderer->oamDirty) {
738 _cleanOAM(renderer);
739 }
740 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
741 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
742 int mosaicY = y - (y % mosaicV);
743 for (w = 0; w < renderer->nWindows; ++w) {
744 renderer->start = renderer->end;
745 renderer->end = renderer->windows[w].endX;
746 renderer->currentWindow = renderer->windows[w].control;
747 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
748 continue;
749 }
750 int i;
751 int drawn;
752
753 for (i = 0; i < renderer->oamMax; ++i) {
754 int localY = y;
755 if (renderer->spriteCyclesRemaining <= 0) {
756 break;
757 }
758 struct GBAVideoSoftwareSprite* sprite = &renderer->sprites[i];
759 if (GBAObjAttributesAIsMosaic(sprite->obj.a)) {
760 localY = mosaicY;
761 }
762 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
763 continue;
764 }
765 drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, localY);
766 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
767 }
768 }
769 }
770
771 unsigned priority;
772 for (priority = 0; priority < 4; ++priority) {
773 renderer->end = 0;
774 for (w = 0; w < renderer->nWindows; ++w) {
775 renderer->start = renderer->end;
776 renderer->end = renderer->windows[w].endX;
777 renderer->currentWindow = renderer->windows[w].control;
778 if (spriteLayers & (1 << priority)) {
779 GBAVideoSoftwareRendererPostprocessSprite(renderer, priority);
780 }
781 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
782 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[0], y);
783 }
784 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
785 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[1], y);
786 }
787 if (TEST_LAYER_ENABLED(2)) {
788 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
789 case 0:
790 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[2], y);
791 break;
792 case 1:
793 case 2:
794 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[2], y);
795 break;
796 case 3:
797 GBAVideoSoftwareRendererDrawBackgroundMode3(renderer, &renderer->bg[2], y);
798 break;
799 case 4:
800 GBAVideoSoftwareRendererDrawBackgroundMode4(renderer, &renderer->bg[2], y);
801 break;
802 case 5:
803 GBAVideoSoftwareRendererDrawBackgroundMode5(renderer, &renderer->bg[2], y);
804 break;
805 }
806 }
807 if (TEST_LAYER_ENABLED(3)) {
808 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
809 case 0:
810 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[3], y);
811 break;
812 case 2:
813 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[3], y);
814 break;
815 }
816 }
817 }
818 }
819 if (GBARegisterDISPCNTGetMode(renderer->dispcnt) != 0) {
820 renderer->bg[2].sx += renderer->bg[2].dmx;
821 renderer->bg[2].sy += renderer->bg[2].dmy;
822 renderer->bg[3].sx += renderer->bg[3].dmx;
823 renderer->bg[3].sy += renderer->bg[3].dmy;
824 }
825}
826
827static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
828 int i;
829 if (renderer->blendEffect == BLEND_BRIGHTEN) {
830 for (i = 0; i < 512; ++i) {
831 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
832 }
833 } else if (renderer->blendEffect == BLEND_DARKEN) {
834 for (i = 0; i < 512; ++i) {
835 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
836 }
837 } else {
838 for (i = 0; i < 512; ++i) {
839 renderer->variantPalette[i] = renderer->normalPalette[i];
840 }
841 }
842}