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/cache-set.h>
9#include <mgba/internal/arm/macros.h>
10#include <mgba/internal/gba/io.h>
11#include <mgba/internal/gba/renderers/cache-set.h>
12
13#include <mgba-util/arm-algo.h>
14#include <mgba-util/memory.h>
15
16#define DIRTY_SCANLINE(R, Y) R->scanlineDirty[Y >> 5] |= (1 << (Y & 0x1F))
17#define CLEAN_SCANLINE(R, Y) R->scanlineDirty[Y >> 5] &= ~(1 << (Y & 0x1F))
18
19static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer);
20static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer);
21static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer);
22static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address);
23static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam);
24static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
25static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
26static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y);
27static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer);
28static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels);
29static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels);
30
31static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer);
32static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, 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->oamDirty = 1;
112 softwareRenderer->oamMax = 0;
113
114 softwareRenderer->mosaic = 0;
115 softwareRenderer->nextY = 0;
116
117 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
118 memset(softwareRenderer->cache, 0, sizeof(softwareRenderer->cache));
119 memset(softwareRenderer->nextIo, 0, sizeof(softwareRenderer->nextIo));
120
121 for (i = 0; i < 4; ++i) {
122 struct GBAVideoSoftwareBackground* bg = &softwareRenderer->bg[i];
123 bg->index = i;
124 bg->enabled = 0;
125 bg->priority = 0;
126 bg->charBase = 0;
127 bg->mosaic = 0;
128 bg->multipalette = 0;
129 bg->screenBase = 0;
130 bg->overflow = 0;
131 bg->size = 0;
132 bg->target1 = 0;
133 bg->target2 = 0;
134 bg->x = 0;
135 bg->y = 0;
136 bg->refx = 0;
137 bg->refy = 0;
138 bg->dx = 256;
139 bg->dmx = 0;
140 bg->dy = 0;
141 bg->dmy = 256;
142 bg->sx = 0;
143 bg->sy = 0;
144 bg->yCache = -1;
145 }
146}
147
148static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer) {
149 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
150 UNUSED(softwareRenderer);
151}
152
153static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
154 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
155 if (renderer->cache) {
156 GBAVideoCacheWriteVideoRegister(renderer->cache, address, value);
157 }
158
159 switch (address) {
160 case REG_DISPCNT:
161 value &= 0xFFF7;
162 softwareRenderer->dispcnt = value;
163 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
164 break;
165 case REG_BG0CNT:
166 value &= 0xDFFF;
167 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
168 break;
169 case REG_BG1CNT:
170 value &= 0xDFFF;
171 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
172 break;
173 case REG_BG2CNT:
174 value &= 0xFFFF;
175 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
176 break;
177 case REG_BG3CNT:
178 value &= 0xFFFF;
179 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
180 break;
181 case REG_BG0HOFS:
182 value &= 0x01FF;
183 softwareRenderer->bg[0].x = value;
184 break;
185 case REG_BG0VOFS:
186 value &= 0x01FF;
187 softwareRenderer->bg[0].y = value;
188 break;
189 case REG_BG1HOFS:
190 value &= 0x01FF;
191 softwareRenderer->bg[1].x = value;
192 break;
193 case REG_BG1VOFS:
194 value &= 0x01FF;
195 softwareRenderer->bg[1].y = value;
196 break;
197 case REG_BG2HOFS:
198 value &= 0x01FF;
199 softwareRenderer->bg[2].x = value;
200 break;
201 case REG_BG2VOFS:
202 value &= 0x01FF;
203 softwareRenderer->bg[2].y = value;
204 break;
205 case REG_BG3HOFS:
206 value &= 0x01FF;
207 softwareRenderer->bg[3].x = value;
208 break;
209 case REG_BG3VOFS:
210 value &= 0x01FF;
211 softwareRenderer->bg[3].y = value;
212 break;
213 case REG_BG2PA:
214 softwareRenderer->bg[2].dx = value;
215 break;
216 case REG_BG2PB:
217 softwareRenderer->bg[2].dmx = value;
218 break;
219 case REG_BG2PC:
220 softwareRenderer->bg[2].dy = value;
221 break;
222 case REG_BG2PD:
223 softwareRenderer->bg[2].dmy = value;
224 break;
225 case REG_BG2X_LO:
226 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[2], value);
227 if (softwareRenderer->bg[2].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[0][0]) {
228 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
229 }
230 break;
231 case REG_BG2X_HI:
232 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[2], value);
233 if (softwareRenderer->bg[2].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[0][0]) {
234 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
235 }
236 break;
237 case REG_BG2Y_LO:
238 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[2], value);
239 if (softwareRenderer->bg[2].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[0][1]) {
240 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
241 }
242 break;
243 case REG_BG2Y_HI:
244 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[2], value);
245 if (softwareRenderer->bg[2].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[0][1]) {
246 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
247 }
248 break;
249 case REG_BG3PA:
250 softwareRenderer->bg[3].dx = value;
251 break;
252 case REG_BG3PB:
253 softwareRenderer->bg[3].dmx = value;
254 break;
255 case REG_BG3PC:
256 softwareRenderer->bg[3].dy = value;
257 break;
258 case REG_BG3PD:
259 softwareRenderer->bg[3].dmy = value;
260 break;
261 case REG_BG3X_LO:
262 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[3], value);
263 if (softwareRenderer->bg[3].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[1][0]) {
264 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
265 }
266 break;
267 case REG_BG3X_HI:
268 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[3], value);
269 if (softwareRenderer->bg[3].sx != softwareRenderer->cache[softwareRenderer->nextY].scale[1][0]) {
270 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
271 }
272 break;
273 case REG_BG3Y_LO:
274 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[3], value);
275 if (softwareRenderer->bg[3].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[1][1]) {
276 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
277 }
278 break;
279 case REG_BG3Y_HI:
280 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[3], value);
281 if (softwareRenderer->bg[3].sy != softwareRenderer->cache[softwareRenderer->nextY].scale[1][1]) {
282 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
283 }
284 break;
285 case REG_BLDCNT:
286 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
287 value &= 0x3FFF;
288 break;
289 case REG_BLDALPHA:
290 softwareRenderer->blda = value & 0x1F;
291 if (softwareRenderer->blda > 0x10) {
292 softwareRenderer->blda = 0x10;
293 }
294 softwareRenderer->bldb = (value >> 8) & 0x1F;
295 if (softwareRenderer->bldb > 0x10) {
296 softwareRenderer->bldb = 0x10;
297 }
298 value &= 0x1F1F;
299 break;
300 case REG_BLDY:
301 value &= 0x1F;
302 if (value > 0x10) {
303 value = 0x10;
304 }
305 if (softwareRenderer->bldy != value) {
306 softwareRenderer->bldy = value;
307 softwareRenderer->blendDirty = true;
308 }
309 break;
310 case REG_WIN0H:
311 softwareRenderer->winN[0].h.end = value;
312 softwareRenderer->winN[0].h.start = value >> 8;
313 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end) {
314 softwareRenderer->winN[0].h.start = 0;
315 }
316 if (softwareRenderer->winN[0].h.end > VIDEO_HORIZONTAL_PIXELS) {
317 softwareRenderer->winN[0].h.end = VIDEO_HORIZONTAL_PIXELS;
318 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS) {
319 softwareRenderer->winN[0].h.start = VIDEO_HORIZONTAL_PIXELS;
320 }
321 }
322 break;
323 case REG_WIN1H:
324 softwareRenderer->winN[1].h.end = value;
325 softwareRenderer->winN[1].h.start = value >> 8;
326 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end) {
327 softwareRenderer->winN[1].h.start = 0;
328 }
329 if (softwareRenderer->winN[1].h.end > VIDEO_HORIZONTAL_PIXELS) {
330 softwareRenderer->winN[1].h.end = VIDEO_HORIZONTAL_PIXELS;
331 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS) {
332 softwareRenderer->winN[1].h.start = VIDEO_HORIZONTAL_PIXELS;
333 }
334 }
335 break;
336 case REG_WIN0V:
337 softwareRenderer->winN[0].v.end = value;
338 softwareRenderer->winN[0].v.start = value >> 8;
339 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end) {
340 softwareRenderer->winN[0].v.start = 0;
341 }
342 if (softwareRenderer->winN[0].v.end > VIDEO_VERTICAL_PIXELS) {
343 softwareRenderer->winN[0].v.end = VIDEO_VERTICAL_PIXELS;
344 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS) {
345 softwareRenderer->winN[0].v.start = VIDEO_VERTICAL_PIXELS;
346 }
347 }
348 break;
349 case REG_WIN1V:
350 softwareRenderer->winN[1].v.end = value;
351 softwareRenderer->winN[1].v.start = value >> 8;
352 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end) {
353 softwareRenderer->winN[1].v.start = 0;
354 }
355 if (softwareRenderer->winN[1].v.end > VIDEO_VERTICAL_PIXELS) {
356 softwareRenderer->winN[1].v.end = VIDEO_VERTICAL_PIXELS;
357 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS) {
358 softwareRenderer->winN[1].v.start = VIDEO_VERTICAL_PIXELS;
359 }
360 }
361 break;
362 case REG_WININ:
363 value &= 0x3F3F;
364 softwareRenderer->winN[0].control.packed = value;
365 softwareRenderer->winN[1].control.packed = value >> 8;
366 break;
367 case REG_WINOUT:
368 value &= 0x3F3F;
369 softwareRenderer->winout.packed = value;
370 softwareRenderer->objwin.packed = value >> 8;
371 break;
372 case REG_MOSAIC:
373 softwareRenderer->mosaic = value;
374 break;
375 case REG_GREENSWP:
376 mLOG(GBA_VIDEO, STUB, "Stub video register write: 0x%03X", address);
377 break;
378 default:
379 mLOG(GBA_VIDEO, GAME_ERROR, "Invalid video register: 0x%03X", address);
380 }
381 softwareRenderer->nextIo[address >> 1] = value;
382 if (softwareRenderer->cache[softwareRenderer->nextY].io[address >> 1] != value) {
383 softwareRenderer->cache[softwareRenderer->nextY].io[address >> 1] = value;
384 DIRTY_SCANLINE(softwareRenderer, softwareRenderer->nextY);
385 }
386 return value;
387}
388
389static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
390 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
391 if (renderer->cache) {
392 mCacheSetWriteVRAM(renderer->cache, address);
393 }
394 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
395 softwareRenderer->bg[0].yCache = -1;
396 softwareRenderer->bg[1].yCache = -1;
397 softwareRenderer->bg[2].yCache = -1;
398 softwareRenderer->bg[3].yCache = -1;
399}
400
401static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
402 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
403 UNUSED(oam);
404 softwareRenderer->oamDirty = 1;
405 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
406}
407
408static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
409 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
410 color_t color = mColorFrom555(value);
411 softwareRenderer->normalPalette[address >> 1] = color;
412 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
413 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
414 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
415 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
416 }
417 if (renderer->cache) {
418 mCacheSetWritePalette(renderer->cache, address >> 1, color);
419 }
420 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
421}
422
423static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
424 if (win->v.end >= win->v.start) {
425 if (y >= win->v.end) {
426 return;
427 }
428 if (y < win->v.start) {
429 return;
430 }
431 } else if (y >= win->v.end && y < win->v.start) {
432 return;
433 }
434 if (win->h.end > VIDEO_HORIZONTAL_PIXELS || win->h.end < win->h.start) {
435 struct WindowN splits[2] = { *win, *win };
436 splits[0].h.start = 0;
437 splits[1].h.end = VIDEO_HORIZONTAL_PIXELS;
438 _breakWindowInner(softwareRenderer, &splits[0]);
439 _breakWindowInner(softwareRenderer, &splits[1]);
440 } else {
441 _breakWindowInner(softwareRenderer, win);
442 }
443}
444
445static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
446 int activeWindow;
447 int startX = 0;
448 if (win->h.end > 0) {
449 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
450 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
451 // Insert a window before the end of the active window
452 struct Window oldWindow = softwareRenderer->windows[activeWindow];
453 if (win->h.start > startX) {
454 // And after the start of the active window
455 int nextWindow = softwareRenderer->nWindows;
456 ++softwareRenderer->nWindows;
457 for (; nextWindow > activeWindow; --nextWindow) {
458 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
459 }
460 softwareRenderer->windows[activeWindow].endX = win->h.start;
461 ++activeWindow;
462 }
463 softwareRenderer->windows[activeWindow].control = win->control;
464 softwareRenderer->windows[activeWindow].endX = win->h.end;
465 if (win->h.end >= oldWindow.endX) {
466 // Trim off extra windows we've overwritten
467 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
468 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
469 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write will occur");
470 return;
471 }
472 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
473 --softwareRenderer->nWindows;
474 }
475 } else {
476 ++activeWindow;
477 int nextWindow = softwareRenderer->nWindows;
478 ++softwareRenderer->nWindows;
479 for (; nextWindow > activeWindow; --nextWindow) {
480 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
481 }
482 softwareRenderer->windows[activeWindow] = oldWindow;
483 }
484 break;
485 }
486 startX = softwareRenderer->windows[activeWindow].endX;
487 }
488 }
489#ifdef DEBUG
490 if (softwareRenderer->nWindows > MAX_WINDOW) {
491 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write occurred!");
492 }
493#endif
494}
495
496static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer) {
497 int i;
498 int oamMax = 0;
499 for (i = 0; i < 128; ++i) {
500 struct GBAObj obj;
501 LOAD_16(obj.a, 0, &renderer->d.oam->obj[i].a);
502 LOAD_16(obj.b, 0, &renderer->d.oam->obj[i].b);
503 LOAD_16(obj.c, 0, &renderer->d.oam->obj[i].c);
504 if (GBAObjAttributesAIsTransformed(obj.a) || !GBAObjAttributesAIsDisable(obj.a)) {
505 int height = GBAVideoObjSizes[GBAObjAttributesAGetShape(obj.a) * 4 + GBAObjAttributesBGetSize(obj.b)][1];
506 if (GBAObjAttributesAIsTransformed(obj.a)) {
507 height <<= GBAObjAttributesAGetDoubleSize(obj.a);
508 }
509 if (GBAObjAttributesAGetY(obj.a) < VIDEO_VERTICAL_PIXELS || GBAObjAttributesAGetY(obj.a) + height >= VIDEO_VERTICAL_TOTAL_PIXELS) {
510 renderer->sprites[oamMax].y = GBAObjAttributesAGetY(obj.a);
511 renderer->sprites[oamMax].endY = GBAObjAttributesAGetY(obj.a) + height;
512 renderer->sprites[oamMax].obj = obj;
513 ++oamMax;
514 }
515 }
516 }
517 renderer->oamMax = oamMax;
518 renderer->oamDirty = 0;
519}
520
521static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
522 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
523
524 if (y == VIDEO_VERTICAL_PIXELS - 1) {
525 softwareRenderer->nextY = 0;
526 } else {
527 softwareRenderer->nextY = y + 1;
528 }
529
530 bool dirty = softwareRenderer->scanlineDirty[y >> 5] & (1 << (y & 0x1F));
531 if (memcmp(softwareRenderer->nextIo, softwareRenderer->cache[y].io, sizeof(softwareRenderer->nextIo))) {
532 memcpy(softwareRenderer->cache[y].io, softwareRenderer->nextIo, sizeof(softwareRenderer->nextIo));
533 dirty = true;
534 }
535
536 softwareRenderer->cache[y].scale[0][0] = softwareRenderer->bg[2].sx;
537 softwareRenderer->cache[y].scale[0][1] = softwareRenderer->bg[2].sy;
538 softwareRenderer->cache[y].scale[1][0] = softwareRenderer->bg[3].sx;
539 softwareRenderer->cache[y].scale[1][1] = softwareRenderer->bg[3].sy;
540
541 if (!dirty) {
542 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) != 0) {
543 softwareRenderer->bg[2].sx += softwareRenderer->bg[2].dmx;
544 softwareRenderer->bg[2].sy += softwareRenderer->bg[2].dmy;
545 softwareRenderer->bg[3].sx += softwareRenderer->bg[3].dmx;
546 softwareRenderer->bg[3].sy += softwareRenderer->bg[3].dmy;
547 }
548 return;
549 }
550
551 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
552 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
553 int x;
554 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
555 row[x] = GBA_COLOR_WHITE;
556 }
557 return;
558 }
559
560 int x;
561 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; x += 4) {
562 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
563 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
564 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
565 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
566 }
567
568 softwareRenderer->windows[0].endX = VIDEO_HORIZONTAL_PIXELS;
569 softwareRenderer->nWindows = 1;
570 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
571 softwareRenderer->windows[0].control = softwareRenderer->winout;
572 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
573 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
574 }
575 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
576 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
577 }
578 } else {
579 softwareRenderer->windows[0].control.packed = 0xFF;
580 }
581
582 if (softwareRenderer->blendDirty) {
583 _updatePalettes(softwareRenderer);
584 softwareRenderer->blendDirty = false;
585 }
586
587 int w;
588 x = 0;
589 for (w = 0; w < softwareRenderer->nWindows; ++w) {
590 // TOOD: handle objwin on backdrop
591 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
592 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
593 backdrop |= softwareRenderer->normalPalette[0];
594 } else {
595 backdrop |= softwareRenderer->variantPalette[0];
596 }
597 int end = softwareRenderer->windows[w].endX;
598 for (; x < end - 3; x += 4) {
599 softwareRenderer->row[x] = backdrop;
600 softwareRenderer->row[x + 1] = backdrop;
601 softwareRenderer->row[x + 2] = backdrop;
602 softwareRenderer->row[x + 3] = backdrop;
603 }
604 for (; x < end; ++x) {
605 softwareRenderer->row[x] = backdrop;
606 }
607 }
608
609 _drawScanline(softwareRenderer, y);
610
611 if (softwareRenderer->target2Bd) {
612 x = 0;
613 for (w = 0; w < softwareRenderer->nWindows; ++w) {
614 uint32_t backdrop = 0;
615 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
616 backdrop |= softwareRenderer->normalPalette[0];
617 } else {
618 backdrop |= softwareRenderer->variantPalette[0];
619 }
620 int end = softwareRenderer->windows[w].endX;
621 for (; x < end; ++x) {
622 uint32_t color = softwareRenderer->row[x];
623 if (color & FLAG_TARGET_1) {
624 softwareRenderer->row[x] = _mix(softwareRenderer->bldb, backdrop, softwareRenderer->blda, color);
625 }
626 }
627 }
628 }
629 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
630 x = 0;
631 uint32_t mask = FLAG_REBLEND | FLAG_TARGET_1 | FLAG_IS_BACKGROUND;
632 uint32_t match = FLAG_REBLEND;
633 if (GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
634 mask |= FLAG_OBJWIN;
635 if (GBAWindowControlIsBlendEnable(softwareRenderer->objwin.packed)) {
636 match |= FLAG_OBJWIN;
637 }
638 }
639 for (w = 0; w < softwareRenderer->nWindows; ++w) {
640 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
641 continue;
642 }
643 int end = softwareRenderer->windows[w].endX;
644 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
645 for (; x < end; ++x) {
646 uint32_t color = softwareRenderer->row[x];
647 if ((color & mask) == match) {
648 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
649 }
650 }
651 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
652 for (; x < end; ++x) {
653 uint32_t color = softwareRenderer->row[x];
654 if ((color & mask) == match) {
655 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
656 }
657 }
658 }
659 }
660 }
661
662#ifdef COLOR_16_BIT
663 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; x += 4) {
664 row[x] = softwareRenderer->row[x];
665 row[x + 1] = softwareRenderer->row[x + 1];
666 row[x + 2] = softwareRenderer->row[x + 2];
667 row[x + 3] = softwareRenderer->row[x + 3];
668 }
669#else
670 memcpy(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS * sizeof(*row));
671#endif
672 CLEAN_SCANLINE(softwareRenderer, y);
673}
674
675static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
676 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
677
678 softwareRenderer->nextY = 0;
679 if (softwareRenderer->temporaryBuffer) {
680 mappedMemoryFree(softwareRenderer->temporaryBuffer, VIDEO_HORIZONTAL_PIXELS * VIDEO_VERTICAL_PIXELS * 4);
681 softwareRenderer->temporaryBuffer = 0;
682 }
683 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
684 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
685 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
686 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
687
688 if (softwareRenderer->bg[0].enabled > 0) {
689 softwareRenderer->bg[0].enabled = 4;
690 }
691 if (softwareRenderer->bg[1].enabled > 0) {
692 softwareRenderer->bg[1].enabled = 4;
693 }
694 if (softwareRenderer->bg[2].enabled > 0) {
695 softwareRenderer->bg[2].enabled = 4;
696 }
697 if (softwareRenderer->bg[3].enabled > 0) {
698 softwareRenderer->bg[3].enabled = 4;
699 }
700}
701
702static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
703 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
704 *stride = softwareRenderer->outputBufferStride;
705 *pixels = softwareRenderer->outputBuffer;
706}
707
708static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
709 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
710
711 const color_t* colorPixels = pixels;
712 unsigned i;
713 for (i = 0; i < VIDEO_VERTICAL_PIXELS; ++i) {
714 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], VIDEO_HORIZONTAL_PIXELS * BYTES_PER_PIXEL);
715 }
716}
717
718static void _enableBg(struct GBAVideoSoftwareRenderer* renderer, int bg, bool active) {
719 if (renderer->d.disableBG[bg] || !active) {
720 renderer->bg[bg].enabled = 0;
721 } else if (!renderer->bg[bg].enabled && active) {
722 if (renderer->nextY == 0) {
723 renderer->bg[bg].enabled = 4;
724 } else {
725 renderer->bg[bg].enabled = 1;
726 }
727 }
728}
729
730static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
731 _enableBg(renderer, 0, GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt));
732 _enableBg(renderer, 1, GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt));
733 _enableBg(renderer, 2, GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt));
734 _enableBg(renderer, 3, GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt));
735}
736
737static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
738 UNUSED(renderer);
739 bg->priority = GBARegisterBGCNTGetPriority(value);
740 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
741 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
742 bg->multipalette = GBARegisterBGCNTGet256Color(value);
743 bg->screenBase = GBARegisterBGCNTGetScreenBase(value) << 11;
744 bg->overflow = GBARegisterBGCNTGetOverflow(value);
745 bg->size = GBARegisterBGCNTGetSize(value);
746}
747
748static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
749 bg->refx = (bg->refx & 0xFFFF0000) | value;
750 bg->sx = bg->refx;
751}
752
753static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
754 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
755 bg->refx <<= 4;
756 bg->refx >>= 4;
757 bg->sx = bg->refx;
758}
759
760static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
761 bg->refy = (bg->refy & 0xFFFF0000) | value;
762 bg->sy = bg->refy;
763}
764
765static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
766 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
767 bg->refy <<= 4;
768 bg->refy >>= 4;
769 bg->sy = bg->refy;
770}
771
772static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
773 enum BlendEffect oldEffect = renderer->blendEffect;
774
775 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
776 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
777 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
778 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
779 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
780 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
781 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
782 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
783
784 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
785 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
786 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
787 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
788 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
789
790 if (oldEffect != renderer->blendEffect) {
791 renderer->blendDirty = true;
792 }
793}
794
795#define TEST_LAYER_ENABLED(X) \
796 (renderer->bg[X].enabled == 4 && \
797 (GBAWindowControlIsBg ## X ## Enable(renderer->currentWindow.packed) || \
798 (GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt) && GBAWindowControlIsBg ## X ## Enable (renderer->objwin.packed))) && \
799 renderer->bg[X].priority == priority)
800
801static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y) {
802 int w;
803 renderer->end = 0;
804 int spriteLayers = 0;
805 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
806 if (renderer->oamDirty) {
807 _cleanOAM(renderer);
808 }
809 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
810 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
811 int mosaicY = y - (y % mosaicV);
812 for (w = 0; w < renderer->nWindows; ++w) {
813 renderer->start = renderer->end;
814 renderer->end = renderer->windows[w].endX;
815 renderer->currentWindow = renderer->windows[w].control;
816 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
817 continue;
818 }
819 int i;
820 int drawn;
821
822 for (i = 0; i < renderer->oamMax; ++i) {
823 int localY = y;
824 if (renderer->spriteCyclesRemaining <= 0) {
825 break;
826 }
827 struct GBAVideoSoftwareSprite* sprite = &renderer->sprites[i];
828 if (GBAObjAttributesAIsMosaic(sprite->obj.a)) {
829 localY = mosaicY;
830 }
831 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
832 continue;
833 }
834 drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, localY);
835 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
836 }
837 }
838 }
839
840 unsigned priority;
841 for (priority = 0; priority < 4; ++priority) {
842 renderer->end = 0;
843 for (w = 0; w < renderer->nWindows; ++w) {
844 renderer->start = renderer->end;
845 renderer->end = renderer->windows[w].endX;
846 renderer->currentWindow = renderer->windows[w].control;
847 if (spriteLayers & (1 << priority)) {
848 GBAVideoSoftwareRendererPostprocessSprite(renderer, priority);
849 }
850 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
851 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[0], y);
852 }
853 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
854 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[1], y);
855 }
856 if (TEST_LAYER_ENABLED(2)) {
857 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
858 case 0:
859 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[2], y);
860 break;
861 case 1:
862 case 2:
863 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[2], y);
864 break;
865 case 3:
866 GBAVideoSoftwareRendererDrawBackgroundMode3(renderer, &renderer->bg[2], y);
867 break;
868 case 4:
869 GBAVideoSoftwareRendererDrawBackgroundMode4(renderer, &renderer->bg[2], y);
870 break;
871 case 5:
872 GBAVideoSoftwareRendererDrawBackgroundMode5(renderer, &renderer->bg[2], y);
873 break;
874 }
875 }
876 if (TEST_LAYER_ENABLED(3)) {
877 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
878 case 0:
879 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[3], y);
880 break;
881 case 2:
882 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[3], y);
883 break;
884 }
885 }
886 }
887 }
888 if (GBARegisterDISPCNTGetMode(renderer->dispcnt) != 0) {
889 renderer->bg[2].sx += renderer->bg[2].dmx;
890 renderer->bg[2].sy += renderer->bg[2].dmy;
891 renderer->bg[3].sx += renderer->bg[3].dmx;
892 renderer->bg[3].sy += renderer->bg[3].dmy;
893 }
894
895 if (renderer->bg[0].enabled > 0 && renderer->bg[0].enabled < 4) {
896 ++renderer->bg[0].enabled;
897 }
898 if (renderer->bg[1].enabled > 0 && renderer->bg[1].enabled < 4) {
899 ++renderer->bg[1].enabled;
900 }
901 if (renderer->bg[2].enabled > 0 && renderer->bg[2].enabled < 4) {
902 ++renderer->bg[2].enabled;
903 }
904 if (renderer->bg[3].enabled > 0 && renderer->bg[3].enabled < 4) {
905 ++renderer->bg[3].enabled;
906 }
907}
908
909static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
910 int i;
911 if (renderer->blendEffect == BLEND_BRIGHTEN) {
912 for (i = 0; i < 512; ++i) {
913 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
914 }
915 } else if (renderer->blendEffect == BLEND_DARKEN) {
916 for (i = 0; i < 512; ++i) {
917 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
918 }
919 } else {
920 for (i = 0; i < 512; ++i) {
921 renderer->variantPalette[i] = renderer->normalPalette[i];
922 }
923 }
924}