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);
40
41static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer);
42
43static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y);
44static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win);
45
46void GBAVideoSoftwareRendererCreate(struct GBAVideoSoftwareRenderer* renderer) {
47 renderer->d.init = GBAVideoSoftwareRendererInit;
48 renderer->d.reset = GBAVideoSoftwareRendererReset;
49 renderer->d.deinit = GBAVideoSoftwareRendererDeinit;
50 renderer->d.writeVideoRegister = GBAVideoSoftwareRendererWriteVideoRegister;
51 renderer->d.writeVRAM = GBAVideoSoftwareRendererWriteVRAM;
52 renderer->d.writeOAM = GBAVideoSoftwareRendererWriteOAM;
53 renderer->d.writePalette = GBAVideoSoftwareRendererWritePalette;
54 renderer->d.drawScanline = GBAVideoSoftwareRendererDrawScanline;
55 renderer->d.finishFrame = GBAVideoSoftwareRendererFinishFrame;
56 renderer->d.getPixels = GBAVideoSoftwareRendererGetPixels;
57 renderer->d.putPixels = GBAVideoSoftwareRendererPutPixels;
58
59 renderer->d.disableBG[0] = false;
60 renderer->d.disableBG[1] = false;
61 renderer->d.disableBG[2] = false;
62 renderer->d.disableBG[3] = false;
63 renderer->d.disableOBJ = false;
64 renderer->tileStride = 0x20;
65 renderer->masterEnd = VIDEO_HORIZONTAL_PIXELS;
66 renderer->masterHeight = VIDEO_VERTICAL_PIXELS;
67 renderer->masterScanlines = VIDEO_VERTICAL_TOTAL_PIXELS;
68
69 renderer->temporaryBuffer = 0;
70}
71
72static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer) {
73 GBAVideoSoftwareRendererReset(renderer);
74
75 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
76
77 int y;
78 for (y = 0; y < softwareRenderer->masterEnd; ++y) {
79 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
80 int x;
81 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
82 row[x] = GBA_COLOR_WHITE;
83 }
84 }
85}
86
87static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer) {
88 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
89 int i;
90
91 softwareRenderer->dispcnt = 0x0080;
92
93 softwareRenderer->target1Obj = 0;
94 softwareRenderer->target1Bd = 0;
95 softwareRenderer->target2Obj = 0;
96 softwareRenderer->target2Bd = 0;
97 softwareRenderer->blendEffect = BLEND_NONE;
98 softwareRenderer->masterBright = 0;
99 softwareRenderer->masterBrightY = 0;
100 for (i = 0; i < 1024; i += 2) {
101 uint16_t entry;
102 LOAD_16(entry, i, softwareRenderer->d.palette);
103 GBAVideoSoftwareRendererWritePalette(renderer, i, entry);
104 }
105 softwareRenderer->objExtPalette = NULL;
106 softwareRenderer->objExtVariantPalette = NULL;
107 softwareRenderer->blendDirty = false;
108 _updatePalettes(softwareRenderer);
109
110 softwareRenderer->blda = 0;
111 softwareRenderer->bldb = 0;
112 softwareRenderer->bldy = 0;
113
114 softwareRenderer->winN[0] = (struct WindowN) { .control = { .priority = 0 } };
115 softwareRenderer->winN[1] = (struct WindowN) { .control = { .priority = 1 } };
116 softwareRenderer->objwin = (struct WindowControl) { .priority = 2 };
117 softwareRenderer->winout = (struct WindowControl) { .priority = 3 };
118 softwareRenderer->oamMax = 0;
119
120 softwareRenderer->mosaic = 0;
121
122 for (i = 0; i < 4; ++i) {
123 struct GBAVideoSoftwareBackground* bg = &softwareRenderer->bg[i];
124 bg->index = i;
125 bg->enabled = 0;
126 bg->priority = 0;
127 bg->charBase = 0;
128 bg->mosaic = 0;
129 bg->multipalette = 0;
130 bg->screenBase = 0;
131 bg->overflow = 0;
132 bg->size = 0;
133 bg->target1 = 0;
134 bg->target2 = 0;
135 bg->x = 0;
136 bg->y = 0;
137 bg->refx = 0;
138 bg->refy = 0;
139 bg->dx = 256;
140 bg->dmx = 0;
141 bg->dy = 0;
142 bg->dmy = 256;
143 bg->sx = 0;
144 bg->sy = 0;
145 bg->extPalette = NULL;
146 bg->variantPalette = NULL;
147 }
148}
149
150static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer) {
151 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
152 UNUSED(softwareRenderer);
153}
154
155static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
156 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
157 switch (address) {
158 case REG_DISPCNT:
159 softwareRenderer->dispcnt = value;
160 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
161 break;
162 case REG_BG0CNT:
163 value &= 0xDFFF;
164 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
165 break;
166 case REG_BG1CNT:
167 value &= 0xDFFF;
168 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
169 break;
170 case REG_BG2CNT:
171 value &= 0xFFFF;
172 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
173 break;
174 case REG_BG3CNT:
175 value &= 0xFFFF;
176 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
177 break;
178 case REG_BG0HOFS:
179 value &= 0x01FF;
180 softwareRenderer->bg[0].x = value;
181 break;
182 case REG_BG0VOFS:
183 value &= 0x01FF;
184 softwareRenderer->bg[0].y = value;
185 break;
186 case REG_BG1HOFS:
187 value &= 0x01FF;
188 softwareRenderer->bg[1].x = value;
189 break;
190 case REG_BG1VOFS:
191 value &= 0x01FF;
192 softwareRenderer->bg[1].y = value;
193 break;
194 case REG_BG2HOFS:
195 value &= 0x01FF;
196 softwareRenderer->bg[2].x = value;
197 break;
198 case REG_BG2VOFS:
199 value &= 0x01FF;
200 softwareRenderer->bg[2].y = value;
201 break;
202 case REG_BG3HOFS:
203 value &= 0x01FF;
204 softwareRenderer->bg[3].x = value;
205 break;
206 case REG_BG3VOFS:
207 value &= 0x01FF;
208 softwareRenderer->bg[3].y = value;
209 break;
210 case REG_BG2PA:
211 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[2], value);
212 break;
213 case REG_BG2PB:
214 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[2], value);
215 break;
216 case REG_BG2PC:
217 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[2], value);
218 break;
219 case REG_BG2PD:
220 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[2], value);
221 break;
222 case REG_BG2X_LO:
223 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[2], value);
224 break;
225 case REG_BG2X_HI:
226 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[2], value);
227 break;
228 case REG_BG2Y_LO:
229 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[2], value);
230 break;
231 case REG_BG2Y_HI:
232 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[2], value);
233 break;
234 case REG_BG3PA:
235 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[3], value);
236 break;
237 case REG_BG3PB:
238 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[3], value);
239 break;
240 case REG_BG3PC:
241 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[3], value);
242 break;
243 case REG_BG3PD:
244 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[3], value);
245 break;
246 case REG_BG3X_LO:
247 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[3], value);
248 break;
249 case REG_BG3X_HI:
250 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[3], value);
251 break;
252 case REG_BG3Y_LO:
253 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[3], value);
254 break;
255 case REG_BG3Y_HI:
256 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[3], value);
257 break;
258 case REG_BLDCNT:
259 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
260 value &= 0x3FFF;
261 break;
262 case REG_BLDALPHA:
263 softwareRenderer->blda = value & 0x1F;
264 if (softwareRenderer->blda > 0x10) {
265 softwareRenderer->blda = 0x10;
266 }
267 softwareRenderer->bldb = (value >> 8) & 0x1F;
268 if (softwareRenderer->bldb > 0x10) {
269 softwareRenderer->bldb = 0x10;
270 }
271 softwareRenderer->blendDirty = true;
272 value &= 0x1F1F;
273 break;
274 case REG_BLDY:
275 value &= 0x1F;
276 if (value > 0x10) {
277 value = 0x10;
278 }
279 if (softwareRenderer->bldy != value) {
280 softwareRenderer->bldy = value;
281 softwareRenderer->blendDirty = true;
282 }
283 break;
284 case REG_WIN0H:
285 softwareRenderer->winN[0].h.end = value & 0xFF;
286 softwareRenderer->winN[0].h.start = value >> 8;
287 if (softwareRenderer->winN[0].h.start > softwareRenderer->masterEnd && softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end) {
288 softwareRenderer->winN[0].h.start = 0;
289 }
290 if (softwareRenderer->winN[0].h.end > softwareRenderer->masterEnd) {
291 softwareRenderer->winN[0].h.end = softwareRenderer->masterEnd;
292 if (softwareRenderer->winN[0].h.start > softwareRenderer->masterEnd) {
293 softwareRenderer->winN[0].h.start = softwareRenderer->masterEnd;
294 }
295 }
296 if (softwareRenderer->masterEnd > 0xFF && softwareRenderer->winN[0].h.end == (softwareRenderer->masterEnd & 0xFF) && softwareRenderer->winN[0].h.start != softwareRenderer->winN[0].h.end) {
297 softwareRenderer->winN[0].h.end = softwareRenderer->masterEnd;
298 }
299 break;
300 case REG_WIN1H:
301 softwareRenderer->winN[1].h.end = value & 0xFF;
302 softwareRenderer->winN[1].h.start = value >> 8;
303 if (softwareRenderer->winN[1].h.start > softwareRenderer->masterEnd && softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end) {
304 softwareRenderer->winN[1].h.start = 0;
305 }
306 if (softwareRenderer->winN[1].h.end > softwareRenderer->masterEnd) {
307 softwareRenderer->winN[1].h.end = softwareRenderer->masterEnd;
308 if (softwareRenderer->winN[1].h.start > softwareRenderer->masterEnd) {
309 softwareRenderer->winN[1].h.start = softwareRenderer->masterEnd;
310 }
311 }
312 if (softwareRenderer->masterEnd > 0xFF && softwareRenderer->winN[1].h.end == (softwareRenderer->masterEnd & 0xFF) && softwareRenderer->winN[1].h.start != softwareRenderer->winN[1].h.end) {
313 softwareRenderer->winN[1].h.end = softwareRenderer->masterEnd;
314 }
315 break;
316 case REG_WIN0V:
317 softwareRenderer->winN[0].v.end = value & 0xFF;
318 softwareRenderer->winN[0].v.start = value >> 8;
319 if (softwareRenderer->winN[0].v.start > softwareRenderer->masterHeight && softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end) {
320 softwareRenderer->winN[0].v.start = 0;
321 }
322 if (softwareRenderer->winN[0].v.end > softwareRenderer->masterHeight) {
323 softwareRenderer->winN[0].v.end = softwareRenderer->masterHeight;
324 if (softwareRenderer->winN[0].v.start > softwareRenderer->masterHeight) {
325 softwareRenderer->winN[0].v.start = softwareRenderer->masterHeight;
326 }
327 }
328 break;
329 case REG_WIN1V:
330 softwareRenderer->winN[1].v.end = value & 0xFF;
331 softwareRenderer->winN[1].v.start = value >> 8;
332 if (softwareRenderer->winN[1].v.start > softwareRenderer->masterHeight && softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end) {
333 softwareRenderer->winN[1].v.start = 0;
334 }
335 if (softwareRenderer->winN[1].v.end > softwareRenderer->masterHeight) {
336 softwareRenderer->winN[1].v.end = softwareRenderer->masterHeight;
337 if (softwareRenderer->winN[1].v.start > softwareRenderer->masterHeight) {
338 softwareRenderer->winN[1].v.start = softwareRenderer->masterHeight;
339 }
340 }
341 break;
342 case REG_WININ:
343 value &= 0x3F3F;
344 softwareRenderer->winN[0].control.packed = value;
345 softwareRenderer->winN[1].control.packed = value >> 8;
346 break;
347 case REG_WINOUT:
348 value &= 0x3F3F;
349 softwareRenderer->winout.packed = value;
350 softwareRenderer->objwin.packed = value >> 8;
351 break;
352 case REG_MOSAIC:
353 softwareRenderer->mosaic = value;
354 break;
355 case REG_GREENSWP:
356 mLOG(GBA_VIDEO, STUB, "Stub video register write: 0x%03X", address);
357 break;
358 default:
359 mLOG(GBA_VIDEO, GAME_ERROR, "Invalid video register: 0x%03X", address);
360 }
361 return value;
362}
363
364static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
365 if (renderer->cache) {
366 mTileCacheWriteVRAM(renderer->cache, address);
367 }
368}
369
370static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
371 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
372 softwareRenderer->oamDirty = 1;
373 UNUSED(oam);
374}
375
376static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
377 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
378#ifdef COLOR_16_BIT
379#ifdef COLOR_5_6_5
380 unsigned color = 0;
381 color |= (value & 0x001F) << 11;
382 color |= (value & 0x03E0) << 1;
383 color |= (value & 0x7C00) >> 10;
384#else
385 unsigned color = value;
386#endif
387#else
388 unsigned color = 0;
389 color |= (value << 3) & 0xF8;
390 color |= (value << 6) & 0xF800;
391 color |= (value << 9) & 0xF80000;
392 color |= (color >> 5) & 0x070707;
393#endif
394 softwareRenderer->normalPalette[address >> 1] = color;
395 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
396 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
397 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
398 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
399 }
400 if (renderer->cache) {
401 mTileCacheWritePalette(renderer->cache, address);
402 }
403}
404
405static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
406 if (win->v.end >= win->v.start) {
407 if (y >= win->v.end) {
408 return;
409 }
410 if (y < win->v.start) {
411 return;
412 }
413 } else if (y >= win->v.end && y < win->v.start) {
414 return;
415 }
416 if (win->h.end > softwareRenderer->masterEnd || win->h.end < win->h.start) {
417 struct WindowN splits[2] = { *win, *win };
418 splits[0].h.start = 0;
419 splits[1].h.end = softwareRenderer->masterEnd;
420 _breakWindowInner(softwareRenderer, &splits[0]);
421 _breakWindowInner(softwareRenderer, &splits[1]);
422 } else {
423 _breakWindowInner(softwareRenderer, win);
424 }
425}
426
427static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
428 int activeWindow;
429 int startX = 0;
430 if (win->h.end > 0) {
431 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
432 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
433 // Insert a window before the end of the active window
434 struct Window oldWindow = softwareRenderer->windows[activeWindow];
435 if (win->h.start > startX) {
436 // And after the start of the active window
437 int nextWindow = softwareRenderer->nWindows;
438 ++softwareRenderer->nWindows;
439 for (; nextWindow > activeWindow; --nextWindow) {
440 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
441 }
442 softwareRenderer->windows[activeWindow].endX = win->h.start;
443 ++activeWindow;
444 }
445 softwareRenderer->windows[activeWindow].control = win->control;
446 softwareRenderer->windows[activeWindow].endX = win->h.end;
447 if (win->h.end >= oldWindow.endX) {
448 // Trim off extra windows we've overwritten
449 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
450 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
451 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write will occur");
452 return;
453 }
454 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
455 --softwareRenderer->nWindows;
456 }
457 } else {
458 ++activeWindow;
459 int nextWindow = softwareRenderer->nWindows;
460 ++softwareRenderer->nWindows;
461 for (; nextWindow > activeWindow; --nextWindow) {
462 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
463 }
464 softwareRenderer->windows[activeWindow] = oldWindow;
465 }
466 break;
467 }
468 startX = softwareRenderer->windows[activeWindow].endX;
469 }
470 }
471#ifdef DEBUG
472 if (softwareRenderer->nWindows > MAX_WINDOW) {
473 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write occurred!");
474 }
475#endif
476}
477
478static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer) {
479 int i;
480 int oamMax = 0;
481 for (i = 0; i < 128; ++i) {
482 struct GBAObj obj;
483 LOAD_16(obj.a, 0, &renderer->d.oam->obj[i].a);
484 LOAD_16(obj.b, 0, &renderer->d.oam->obj[i].b);
485 LOAD_16(obj.c, 0, &renderer->d.oam->obj[i].c);
486 if (GBAObjAttributesAIsTransformed(obj.a) || !GBAObjAttributesAIsDisable(obj.a)) {
487 int height = GBAVideoObjSizes[GBAObjAttributesAGetShape(obj.a) * 4 + GBAObjAttributesBGetSize(obj.b)][1];
488 if (GBAObjAttributesAIsTransformed(obj.a)) {
489 height <<= GBAObjAttributesAGetDoubleSize(obj.a);
490 }
491 if (GBAObjAttributesAGetY(obj.a) < renderer->masterHeight || GBAObjAttributesAGetY(obj.a) + height >= renderer->masterScanlines) {
492 renderer->sprites[oamMax].y = GBAObjAttributesAGetY(obj.a);
493 renderer->sprites[oamMax].endY = GBAObjAttributesAGetY(obj.a) + height;
494 renderer->sprites[oamMax].obj = obj;
495 ++oamMax;
496 }
497 }
498 }
499 renderer->oamMax = oamMax;
500 renderer->oamDirty = 0;
501}
502
503static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
504 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
505
506 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
507 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
508 int x;
509 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
510 row[x] = GBA_COLOR_WHITE;
511 }
512 return;
513 }
514
515 uint16_t* objVramBase = softwareRenderer->d.vramOBJ[0];
516 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) >= 3) {
517 softwareRenderer->d.vramOBJ[0] = NULL; // OBJ VRAM bottom is blocked in bitmap modes
518 }
519
520 GBAVideoSoftwareRendererPreprocessBuffer(softwareRenderer, y);
521 int spriteLayers = GBAVideoSoftwareRendererPreprocessSpriteLayer(softwareRenderer, y);
522 softwareRenderer->d.vramOBJ[0] = objVramBase;
523
524 int w;
525 unsigned priority;
526 for (priority = 0; priority < 4; ++priority) {
527 softwareRenderer->end = 0;
528 for (w = 0; w < softwareRenderer->nWindows; ++w) {
529 softwareRenderer->start = softwareRenderer->end;
530 softwareRenderer->end = softwareRenderer->windows[w].endX;
531 softwareRenderer->currentWindow = softwareRenderer->windows[w].control;
532 if (spriteLayers & (1 << priority)) {
533 GBAVideoSoftwareRendererPostprocessSprite(softwareRenderer, priority);
534 }
535 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
536 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[0], y);
537 }
538 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
539 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[1], y);
540 }
541 if (TEST_LAYER_ENABLED(2)) {
542 switch (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt)) {
543 case 0:
544 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[2], y);
545 break;
546 case 1:
547 case 2:
548 GBAVideoSoftwareRendererDrawBackgroundMode2(softwareRenderer, &softwareRenderer->bg[2], y);
549 break;
550 case 3:
551 GBAVideoSoftwareRendererDrawBackgroundMode3(softwareRenderer, &softwareRenderer->bg[2], y);
552 break;
553 case 4:
554 GBAVideoSoftwareRendererDrawBackgroundMode4(softwareRenderer, &softwareRenderer->bg[2], y);
555 break;
556 case 5:
557 GBAVideoSoftwareRendererDrawBackgroundMode5(softwareRenderer, &softwareRenderer->bg[2], y);
558 break;
559 }
560 }
561 if (TEST_LAYER_ENABLED(3)) {
562 switch (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt)) {
563 case 0:
564 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[3], y);
565 break;
566 case 2:
567 GBAVideoSoftwareRendererDrawBackgroundMode2(softwareRenderer, &softwareRenderer->bg[3], y);
568 break;
569 }
570 }
571 }
572 }
573 softwareRenderer->bg[2].sx += softwareRenderer->bg[2].dmx;
574 softwareRenderer->bg[2].sy += softwareRenderer->bg[2].dmy;
575 softwareRenderer->bg[3].sx += softwareRenderer->bg[3].dmx;
576 softwareRenderer->bg[3].sy += softwareRenderer->bg[3].dmy;
577
578 GBAVideoSoftwareRendererPostprocessBuffer(softwareRenderer);
579
580#ifdef COLOR_16_BIT
581#if defined(__ARM_NEON) && !defined(__APPLE__)
582 _to16Bit(row, softwareRenderer->row, softwareRenderer->masterEnd);
583#else
584 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
585 row[x] = softwareRenderer->row[x];
586 }
587#endif
588#else
589 memcpy(row, softwareRenderer->row, softwareRenderer->masterEnd * sizeof(*row));
590#endif
591}
592
593static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
594 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
595
596 if (softwareRenderer->temporaryBuffer) {
597 mappedMemoryFree(softwareRenderer->temporaryBuffer, softwareRenderer->masterEnd * softwareRenderer->masterHeight * 4);
598 softwareRenderer->temporaryBuffer = 0;
599 }
600 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
601 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
602 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
603 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
604}
605
606static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
607 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
608 *stride = softwareRenderer->outputBufferStride;
609 *pixels = softwareRenderer->outputBuffer;
610}
611
612static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
613 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
614
615 const color_t* colorPixels = pixels;
616 int i;
617 for (i = 0; i < softwareRenderer->masterHeight; ++i) {
618 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], softwareRenderer->masterEnd * BYTES_PER_PIXEL);
619 }
620}
621
622static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
623 renderer->bg[0].enabled = GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt) && !renderer->d.disableBG[0];
624 renderer->bg[1].enabled = GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt) && !renderer->d.disableBG[1];
625 renderer->bg[2].enabled = GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt) && !renderer->d.disableBG[2];
626 renderer->bg[3].enabled = GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt) && !renderer->d.disableBG[3];
627}
628
629static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
630 UNUSED(renderer);
631 bg->priority = GBARegisterBGCNTGetPriority(value);
632 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
633 bg->charBase &= 0xC000;
634 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
635 bg->multipalette = GBARegisterBGCNTGet256Color(value);
636 bg->screenBase &= ~0xF800;
637 bg->screenBase |= GBARegisterBGCNTGetScreenBase(value) << 11;
638 bg->overflow = GBARegisterBGCNTGetOverflow(value);
639 bg->size = GBARegisterBGCNTGetSize(value);
640 bg->control = value;
641}
642
643static void GBAVideoSoftwareRendererWriteBGPA(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
644 bg->dx = value;
645}
646
647static void GBAVideoSoftwareRendererWriteBGPB(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
648 bg->dmx = value;
649}
650
651static void GBAVideoSoftwareRendererWriteBGPC(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
652 bg->dy = value;
653}
654
655static void GBAVideoSoftwareRendererWriteBGPD(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
656 bg->dmy = value;
657}
658
659static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
660 bg->refx = (bg->refx & 0xFFFF0000) | value;
661 bg->sx = bg->refx;
662}
663
664static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
665 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
666 bg->refx <<= 4;
667 bg->refx >>= 4;
668 bg->sx = bg->refx;
669}
670
671static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
672 bg->refy = (bg->refy & 0xFFFF0000) | value;
673 bg->sy = bg->refy;
674}
675
676static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
677 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
678 bg->refy <<= 4;
679 bg->refy >>= 4;
680 bg->sy = bg->refy;
681}
682
683static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
684 enum BlendEffect oldEffect = renderer->blendEffect;
685
686 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
687 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
688 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
689 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
690 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
691 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
692 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
693 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
694
695 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
696 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
697 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
698 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
699 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
700
701 if (oldEffect != renderer->blendEffect) {
702 renderer->blendDirty = true;
703 }
704}
705
706void GBAVideoSoftwareRendererPreprocessBuffer(struct GBAVideoSoftwareRenderer* softwareRenderer, int y) {
707 int x;
708 int masterEnd = softwareRenderer->masterEnd;
709 for (x = 0; x < masterEnd; x += 4) {
710 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
711 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
712 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
713 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
714 }
715
716 softwareRenderer->windows[0].endX = softwareRenderer->masterEnd;
717 softwareRenderer->nWindows = 1;
718 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
719 softwareRenderer->windows[0].control = softwareRenderer->winout;
720 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
721 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
722 }
723 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
724 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
725 }
726 } else {
727 softwareRenderer->windows[0].control.packed = 0xFF;
728 }
729
730 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
731
732 int w;
733 x = 0;
734 for (w = 0; w < softwareRenderer->nWindows; ++w) {
735 // TOOD: handle objwin on backdrop
736 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
737 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
738 backdrop |= softwareRenderer->normalPalette[0];
739 } else {
740 backdrop |= softwareRenderer->variantPalette[0];
741 }
742 int end = softwareRenderer->windows[w].endX;
743 for (; x & 3; ++x) {
744 softwareRenderer->row[x] = backdrop;
745 }
746 for (; x < end - 3; x += 4) {
747 softwareRenderer->row[x] = backdrop;
748 softwareRenderer->row[x + 1] = backdrop;
749 softwareRenderer->row[x + 2] = backdrop;
750 softwareRenderer->row[x + 3] = backdrop;
751 }
752 for (; x < end; ++x) {
753 softwareRenderer->row[x] = backdrop;
754 }
755 }
756
757 if (softwareRenderer->blendDirty) {
758 _updatePalettes(softwareRenderer);
759 softwareRenderer->blendDirty = false;
760 }
761}
762
763void GBAVideoSoftwareRendererPostprocessBuffer(struct GBAVideoSoftwareRenderer* softwareRenderer) {
764 int x, w;
765 if (softwareRenderer->target2Bd) {
766 x = 0;
767 for (w = 0; w < softwareRenderer->nWindows; ++w) {
768 uint32_t backdrop = 0;
769 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
770 backdrop |= softwareRenderer->normalPalette[0];
771 } else {
772 backdrop |= softwareRenderer->variantPalette[0];
773 }
774 int end = softwareRenderer->windows[w].endX;
775 for (; x < end; ++x) {
776 uint32_t color = softwareRenderer->row[x];
777 if (color & FLAG_TARGET_1) {
778 softwareRenderer->row[x] = _mix(softwareRenderer->alphaB[x], backdrop, softwareRenderer->alphaA[x], color);
779 }
780 }
781 }
782 }
783 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
784 x = 0;
785 for (w = 0; w < softwareRenderer->nWindows; ++w) {
786 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
787 continue;
788 }
789 int end = softwareRenderer->windows[w].endX;
790 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
791 for (; x < end; ++x) {
792 uint32_t color = softwareRenderer->row[x];
793 if ((color & 0xFF000000) == FLAG_REBLEND) {
794 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
795 }
796 }
797 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
798 for (; x < end; ++x) {
799 uint32_t color = softwareRenderer->row[x];
800 if ((color & 0xFF000000) == FLAG_REBLEND) {
801 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
802 }
803 }
804 }
805 }
806 }
807}
808
809int GBAVideoSoftwareRendererPreprocessSpriteLayer(struct GBAVideoSoftwareRenderer* renderer, int y) {
810 int w;
811 renderer->end = 0;
812 int spriteLayers = 0;
813 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
814 if (renderer->oamDirty) {
815 _cleanOAM(renderer);
816 }
817 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
818 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
819 int mosaicY = y - (y % mosaicV);
820 for (w = 0; w < renderer->nWindows; ++w) {
821 renderer->start = renderer->end;
822 renderer->end = renderer->windows[w].endX;
823 renderer->currentWindow = renderer->windows[w].control;
824 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
825 continue;
826 }
827 int i;
828 int drawn;
829
830 for (i = 0; i < renderer->oamMax; ++i) {
831 int localY = y;
832 if (renderer->spriteCyclesRemaining <= 0) {
833 break;
834 }
835 struct GBAVideoSoftwareSprite* sprite = &renderer->sprites[i];
836 if (GBAObjAttributesAIsMosaic(sprite->obj.a)) {
837 localY = mosaicY;
838 }
839 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
840 continue;
841 }
842 drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, localY);
843 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
844 }
845 }
846 }
847 return spriteLayers;
848}
849
850static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
851 int i;
852 memset(renderer->alphaA, renderer->blda, sizeof(renderer->alphaA));
853 memset(renderer->alphaB, renderer->bldb, sizeof(renderer->alphaB));
854 if (renderer->blendEffect == BLEND_BRIGHTEN) {
855 for (i = 0; i < 512; ++i) {
856 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
857 }
858 } else if (renderer->blendEffect == BLEND_DARKEN) {
859 for (i = 0; i < 512; ++i) {
860 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
861 }
862 } else {
863 for (i = 0; i < 512; ++i) {
864 renderer->variantPalette[i] = renderer->normalPalette[i];
865 }
866 }
867}