src/gba/renderers/video-software.c (view raw)
1/* Copyright (c) 2013-2015 Jeffrey Pfau
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6#include "software-private.h"
7
8#include "gba/gba.h"
9#include "gba/io.h"
10#include "gba/renderers/tile-cache.h"
11
12#include "util/arm-algo.h"
13#include "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, unsigned* stride, const void** pixels);
25static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, unsigned stride, 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 GBAVideoSoftwareRendererWritePalette(renderer, i, softwareRenderer->d.palette[i >> 1]);
97 }
98 _updatePalettes(softwareRenderer);
99
100 softwareRenderer->blda = 0;
101 softwareRenderer->bldb = 0;
102 softwareRenderer->bldy = 0;
103
104 softwareRenderer->winN[0] = (struct WindowN) { .control = { .priority = 0 } };
105 softwareRenderer->winN[1] = (struct WindowN) { .control = { .priority = 1 } };
106 softwareRenderer->objwin = (struct WindowControl) { .priority = 2 };
107 softwareRenderer->winout = (struct WindowControl) { .priority = 3 };
108 softwareRenderer->oamMax = 0;
109
110 softwareRenderer->mosaic = 0;
111
112 for (i = 0; i < 4; ++i) {
113 struct GBAVideoSoftwareBackground* bg = &softwareRenderer->bg[i];
114 bg->index = i;
115 bg->enabled = 0;
116 bg->priority = 0;
117 bg->charBase = 0;
118 bg->mosaic = 0;
119 bg->multipalette = 0;
120 bg->screenBase = 0;
121 bg->overflow = 0;
122 bg->size = 0;
123 bg->target1 = 0;
124 bg->target2 = 0;
125 bg->x = 0;
126 bg->y = 0;
127 bg->refx = 0;
128 bg->refy = 0;
129 bg->dx = 256;
130 bg->dmx = 0;
131 bg->dy = 0;
132 bg->dmy = 256;
133 bg->sx = 0;
134 bg->sy = 0;
135 }
136}
137
138static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer) {
139 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
140 UNUSED(softwareRenderer);
141}
142
143static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
144 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
145 switch (address) {
146 case REG_DISPCNT:
147 softwareRenderer->dispcnt = value;
148 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
149 break;
150 case REG_BG0CNT:
151 value &= 0xDFFF;
152 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
153 break;
154 case REG_BG1CNT:
155 value &= 0xDFFF;
156 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
157 break;
158 case REG_BG2CNT:
159 value &= 0xFFFF;
160 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
161 break;
162 case REG_BG3CNT:
163 value &= 0xFFFF;
164 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
165 break;
166 case REG_BG0HOFS:
167 value &= 0x01FF;
168 softwareRenderer->bg[0].x = value;
169 break;
170 case REG_BG0VOFS:
171 value &= 0x01FF;
172 softwareRenderer->bg[0].y = value;
173 break;
174 case REG_BG1HOFS:
175 value &= 0x01FF;
176 softwareRenderer->bg[1].x = value;
177 break;
178 case REG_BG1VOFS:
179 value &= 0x01FF;
180 softwareRenderer->bg[1].y = value;
181 break;
182 case REG_BG2HOFS:
183 value &= 0x01FF;
184 softwareRenderer->bg[2].x = value;
185 break;
186 case REG_BG2VOFS:
187 value &= 0x01FF;
188 softwareRenderer->bg[2].y = value;
189 break;
190 case REG_BG3HOFS:
191 value &= 0x01FF;
192 softwareRenderer->bg[3].x = value;
193 break;
194 case REG_BG3VOFS:
195 value &= 0x01FF;
196 softwareRenderer->bg[3].y = value;
197 break;
198 case REG_BG2PA:
199 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[2], value);
200 break;
201 case REG_BG2PB:
202 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[2], value);
203 break;
204 case REG_BG2PC:
205 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[2], value);
206 break;
207 case REG_BG2PD:
208 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[2], value);
209 break;
210 case REG_BG2X_LO:
211 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[2], value);
212 break;
213 case REG_BG2X_HI:
214 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[2], value);
215 break;
216 case REG_BG2Y_LO:
217 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[2], value);
218 break;
219 case REG_BG2Y_HI:
220 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[2], value);
221 break;
222 case REG_BG3PA:
223 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[3], value);
224 break;
225 case REG_BG3PB:
226 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[3], value);
227 break;
228 case REG_BG3PC:
229 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[3], value);
230 break;
231 case REG_BG3PD:
232 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[3], value);
233 break;
234 case REG_BG3X_LO:
235 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[3], value);
236 break;
237 case REG_BG3X_HI:
238 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[3], value);
239 break;
240 case REG_BG3Y_LO:
241 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[3], value);
242 break;
243 case REG_BG3Y_HI:
244 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[3], value);
245 break;
246 case REG_BLDCNT:
247 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
248 value &= 0x3FFF;
249 break;
250 case REG_BLDALPHA:
251 softwareRenderer->blda = value & 0x1F;
252 if (softwareRenderer->blda > 0x10) {
253 softwareRenderer->blda = 0x10;
254 }
255 softwareRenderer->bldb = (value >> 8) & 0x1F;
256 if (softwareRenderer->bldb > 0x10) {
257 softwareRenderer->bldb = 0x10;
258 }
259 value &= 0x1F1F;
260 break;
261 case REG_BLDY:
262 softwareRenderer->bldy = value & 0x1F;
263 if (softwareRenderer->bldy > 0x10) {
264 softwareRenderer->bldy = 0x10;
265 }
266 _updatePalettes(softwareRenderer);
267 break;
268 case REG_WIN0H:
269 softwareRenderer->winN[0].h.end = value;
270 softwareRenderer->winN[0].h.start = value >> 8;
271 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end) {
272 softwareRenderer->winN[0].h.start = 0;
273 }
274 if (softwareRenderer->winN[0].h.end > VIDEO_HORIZONTAL_PIXELS) {
275 softwareRenderer->winN[0].h.end = VIDEO_HORIZONTAL_PIXELS;
276 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS) {
277 softwareRenderer->winN[0].h.start = VIDEO_HORIZONTAL_PIXELS;
278 }
279 }
280 break;
281 case REG_WIN1H:
282 softwareRenderer->winN[1].h.end = value;
283 softwareRenderer->winN[1].h.start = value >> 8;
284 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end) {
285 softwareRenderer->winN[1].h.start = 0;
286 }
287 if (softwareRenderer->winN[1].h.end > VIDEO_HORIZONTAL_PIXELS) {
288 softwareRenderer->winN[1].h.end = VIDEO_HORIZONTAL_PIXELS;
289 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS) {
290 softwareRenderer->winN[1].h.start = VIDEO_HORIZONTAL_PIXELS;
291 }
292 }
293 break;
294 case REG_WIN0V:
295 softwareRenderer->winN[0].v.end = value;
296 softwareRenderer->winN[0].v.start = value >> 8;
297 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end) {
298 softwareRenderer->winN[0].v.start = 0;
299 }
300 if (softwareRenderer->winN[0].v.end > VIDEO_VERTICAL_PIXELS) {
301 softwareRenderer->winN[0].v.end = VIDEO_VERTICAL_PIXELS;
302 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS) {
303 softwareRenderer->winN[0].v.start = VIDEO_VERTICAL_PIXELS;
304 }
305 }
306 break;
307 case REG_WIN1V:
308 softwareRenderer->winN[1].v.end = value;
309 softwareRenderer->winN[1].v.start = value >> 8;
310 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end) {
311 softwareRenderer->winN[1].v.start = 0;
312 }
313 if (softwareRenderer->winN[1].v.end > VIDEO_VERTICAL_PIXELS) {
314 softwareRenderer->winN[1].v.end = VIDEO_VERTICAL_PIXELS;
315 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS) {
316 softwareRenderer->winN[1].v.start = VIDEO_VERTICAL_PIXELS;
317 }
318 }
319 break;
320 case REG_WININ:
321 value &= 0x3F3F;
322 softwareRenderer->winN[0].control.packed = value;
323 softwareRenderer->winN[1].control.packed = value >> 8;
324 break;
325 case REG_WINOUT:
326 value &= 0x3F3F;
327 softwareRenderer->winout.packed = value;
328 softwareRenderer->objwin.packed = value >> 8;
329 break;
330 case REG_MOSAIC:
331 softwareRenderer->mosaic = value;
332 break;
333 case REG_GREENSWP:
334 mLOG(GBA_VIDEO, STUB, "Stub video register write: 0x%03X", address);
335 break;
336 default:
337 mLOG(GBA_VIDEO, GAME_ERROR, "Invalid video register: 0x%03X", address);
338 }
339 return value;
340}
341
342static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
343 if (renderer->cache) {
344 GBAVideoTileCacheWriteVRAM(renderer->cache, address);
345 }
346}
347
348static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
349 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
350 softwareRenderer->oamDirty = 1;
351 UNUSED(oam);
352}
353
354static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
355 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
356#ifdef COLOR_16_BIT
357#ifdef COLOR_5_6_5
358 unsigned color = 0;
359 color |= (value & 0x001F) << 11;
360 color |= (value & 0x03E0) << 1;
361 color |= (value & 0x7C00) >> 10;
362#else
363 unsigned color = value;
364#endif
365#else
366 unsigned color = 0;
367 color |= (value << 3) & 0xF8;
368 color |= (value << 6) & 0xF800;
369 color |= (value << 9) & 0xF80000;
370#endif
371 softwareRenderer->normalPalette[address >> 1] = color;
372 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
373 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
374 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
375 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
376 }
377 if (renderer->cache) {
378 GBAVideoTileCacheWritePalette(renderer->cache, address);
379 }
380}
381
382static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
383 if (win->v.end >= win->v.start) {
384 if (y >= win->v.end) {
385 return;
386 }
387 if (y < win->v.start) {
388 return;
389 }
390 } else if (y >= win->v.end && y < win->v.start) {
391 return;
392 }
393 if (win->h.end > VIDEO_HORIZONTAL_PIXELS || win->h.end < win->h.start) {
394 struct WindowN splits[2] = { *win, *win };
395 splits[0].h.start = 0;
396 splits[1].h.end = VIDEO_HORIZONTAL_PIXELS;
397 _breakWindowInner(softwareRenderer, &splits[0]);
398 _breakWindowInner(softwareRenderer, &splits[1]);
399 } else {
400 _breakWindowInner(softwareRenderer, win);
401 }
402}
403
404static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
405 int activeWindow;
406 int startX = 0;
407 if (win->h.end > 0) {
408 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
409 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
410 // Insert a window before the end of the active window
411 struct Window oldWindow = softwareRenderer->windows[activeWindow];
412 if (win->h.start > startX) {
413 // And after the start of the active window
414 int nextWindow = softwareRenderer->nWindows;
415 ++softwareRenderer->nWindows;
416 for (; nextWindow > activeWindow; --nextWindow) {
417 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
418 }
419 softwareRenderer->windows[activeWindow].endX = win->h.start;
420 ++activeWindow;
421 }
422 softwareRenderer->windows[activeWindow].control = win->control;
423 softwareRenderer->windows[activeWindow].endX = win->h.end;
424 if (win->h.end >= oldWindow.endX) {
425 // Trim off extra windows we've overwritten
426 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
427 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
428 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write will occur");
429 return;
430 }
431 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
432 --softwareRenderer->nWindows;
433 }
434 } else {
435 ++activeWindow;
436 int nextWindow = softwareRenderer->nWindows;
437 ++softwareRenderer->nWindows;
438 for (; nextWindow > activeWindow; --nextWindow) {
439 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
440 }
441 softwareRenderer->windows[activeWindow] = oldWindow;
442 }
443 break;
444 }
445 startX = softwareRenderer->windows[activeWindow].endX;
446 }
447 }
448#ifdef DEBUG
449 if (softwareRenderer->nWindows > MAX_WINDOW) {
450 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write occurred!");
451 }
452#endif
453}
454
455static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer) {
456 int i;
457 int oamMax = 0;
458 for (i = 0; i < 128; ++i) {
459 struct GBAObj obj;
460 LOAD_16(obj.a, 0, &renderer->d.oam->obj[i].a);
461 LOAD_16(obj.b, 0, &renderer->d.oam->obj[i].b);
462 LOAD_16(obj.c, 0, &renderer->d.oam->obj[i].c);
463 if (GBAObjAttributesAIsTransformed(obj.a) || !GBAObjAttributesAIsDisable(obj.a)) {
464 int height = GBAVideoObjSizes[GBAObjAttributesAGetShape(obj.a) * 4 + GBAObjAttributesBGetSize(obj.b)][1];
465 if (GBAObjAttributesAIsTransformed(obj.a)) {
466 height <<= GBAObjAttributesAGetDoubleSize(obj.a);
467 }
468 if (GBAObjAttributesAGetY(obj.a) < VIDEO_VERTICAL_PIXELS || GBAObjAttributesAGetY(obj.a) + height >= VIDEO_VERTICAL_TOTAL_PIXELS) {
469 renderer->sprites[oamMax].y = GBAObjAttributesAGetY(obj.a);
470 renderer->sprites[oamMax].endY = GBAObjAttributesAGetY(obj.a) + height;
471 renderer->sprites[oamMax].obj = obj;
472 ++oamMax;
473 }
474 }
475 }
476 renderer->oamMax = oamMax;
477 renderer->oamDirty = 0;
478}
479
480static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
481 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
482
483 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
484 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
485 int x;
486 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
487 row[x] = GBA_COLOR_WHITE;
488 }
489 return;
490 }
491
492 int x;
493 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; x += 4) {
494 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
495 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
496 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
497 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
498 }
499
500 softwareRenderer->windows[0].endX = VIDEO_HORIZONTAL_PIXELS;
501 softwareRenderer->nWindows = 1;
502 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
503 softwareRenderer->windows[0].control = softwareRenderer->winout;
504 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
505 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
506 }
507 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
508 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
509 }
510 } else {
511 softwareRenderer->windows[0].control.packed = 0xFF;
512 }
513
514 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
515
516 int w;
517 x = 0;
518 for (w = 0; w < softwareRenderer->nWindows; ++w) {
519 // TOOD: handle objwin on backdrop
520 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
521 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
522 backdrop |= softwareRenderer->normalPalette[0];
523 } else {
524 backdrop |= softwareRenderer->variantPalette[0];
525 }
526 int end = softwareRenderer->windows[w].endX;
527 for (; x < end - 3; x += 4) {
528 softwareRenderer->row[x] = backdrop;
529 softwareRenderer->row[x + 1] = backdrop;
530 softwareRenderer->row[x + 2] = backdrop;
531 softwareRenderer->row[x + 3] = backdrop;
532 }
533 for (; x < end; ++x) {
534 softwareRenderer->row[x] = backdrop;
535 }
536 }
537
538 _drawScanline(softwareRenderer, y);
539
540 if (softwareRenderer->target2Bd) {
541 x = 0;
542 for (w = 0; w < softwareRenderer->nWindows; ++w) {
543 uint32_t backdrop = 0;
544 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
545 backdrop |= softwareRenderer->normalPalette[0];
546 } else {
547 backdrop |= softwareRenderer->variantPalette[0];
548 }
549 int end = softwareRenderer->windows[w].endX;
550 for (; x < end; ++x) {
551 uint32_t color = softwareRenderer->row[x];
552 if (color & FLAG_TARGET_1) {
553 softwareRenderer->row[x] = _mix(softwareRenderer->bldb, backdrop, softwareRenderer->blda, color);
554 }
555 }
556 }
557 }
558 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
559 x = 0;
560 for (w = 0; w < softwareRenderer->nWindows; ++w) {
561 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
562 continue;
563 }
564 int end = softwareRenderer->windows[w].endX;
565 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
566 for (; x < end; ++x) {
567 uint32_t color = softwareRenderer->row[x];
568 if ((color & 0xFF000000) == FLAG_REBLEND) {
569 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
570 }
571 }
572 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
573 for (; x < end; ++x) {
574 uint32_t color = softwareRenderer->row[x];
575 if ((color & 0xFF000000) == FLAG_REBLEND) {
576 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
577 }
578 }
579 }
580 }
581 }
582
583#ifdef COLOR_16_BIT
584#if defined(__ARM_NEON) && !defined(__APPLE__)
585 _to16Bit(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS);
586#else
587 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
588 row[x] = softwareRenderer->row[x];
589 }
590#endif
591#else
592 memcpy(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS * sizeof(*row));
593#endif
594}
595
596static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
597 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
598
599 if (softwareRenderer->temporaryBuffer) {
600 mappedMemoryFree(softwareRenderer->temporaryBuffer, VIDEO_HORIZONTAL_PIXELS * VIDEO_VERTICAL_PIXELS * 4);
601 softwareRenderer->temporaryBuffer = 0;
602 }
603 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
604 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
605 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
606 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
607}
608
609static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, unsigned* stride, const void** pixels) {
610 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
611
612#ifdef COLOR_16_BIT
613 *stride = VIDEO_HORIZONTAL_PIXELS;
614 if (!softwareRenderer->temporaryBuffer) {
615 softwareRenderer->temporaryBuffer = anonymousMemoryMap(VIDEO_HORIZONTAL_PIXELS * VIDEO_VERTICAL_PIXELS * 4);
616 }
617 *pixels = softwareRenderer->temporaryBuffer;
618 unsigned y, x;
619 for (y = 0; y < VIDEO_VERTICAL_PIXELS; ++y) {
620 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
621 color_t inColor = softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y + x];
622 uint32_t outColor;
623#ifdef COLOR_5_6_5
624 outColor = (inColor & 0x1F) << 19;
625 outColor |= (inColor & 0x7C0) << 5;
626 outColor |= (inColor & 0xF800) >> 8;
627#else
628 outColor = (inColor & 0x1F) << 3;
629 outColor |= (inColor & 0x3E0) << 6;
630 outColor |= (inColor & 0x7C00) << 9;
631#endif
632 softwareRenderer->temporaryBuffer[VIDEO_HORIZONTAL_PIXELS * y + x] = outColor;
633 }
634 }
635#else
636 *stride = softwareRenderer->outputBufferStride;
637 *pixels = softwareRenderer->outputBuffer;
638#endif
639}
640
641static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, unsigned stride, void* pixels) {
642 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
643
644 uint32_t* colorPixels = pixels;
645 unsigned i;
646 for (i = 0; i < VIDEO_VERTICAL_PIXELS; ++i) {
647#ifdef COLOR_16_BIT
648 unsigned x;
649 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
650 uint32_t inColor = colorPixels[stride * i + x];
651 color_t outColor;
652#ifdef COLOR_5_6_5
653 outColor = (inColor >> 19) & 0x1F;
654 outColor |= (inColor >> 5) & 0x7C0;
655 outColor |= (inColor << 8) & 0xF800;
656#else
657 outColor = (inColor >> 3) & 0x1F;
658 outColor |= (inColor >> 6) & 0x3E0;
659 outColor |= (inColor >> 9) & 0x7C00;
660#endif
661 softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i + x] = outColor;
662 }
663#else
664 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], VIDEO_HORIZONTAL_PIXELS * BYTES_PER_PIXEL);
665#endif
666 }
667}
668
669static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
670 renderer->bg[0].enabled = GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt) && !renderer->d.disableBG[0];
671 renderer->bg[1].enabled = GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt) && !renderer->d.disableBG[1];
672 renderer->bg[2].enabled = GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt) && !renderer->d.disableBG[2];
673 renderer->bg[3].enabled = GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt) && !renderer->d.disableBG[3];
674}
675
676static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
677 UNUSED(renderer);
678 bg->priority = GBARegisterBGCNTGetPriority(value);
679 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
680 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
681 bg->multipalette = GBARegisterBGCNTGet256Color(value);
682 bg->screenBase = GBARegisterBGCNTGetScreenBase(value) << 11;
683 bg->overflow = GBARegisterBGCNTGetOverflow(value);
684 bg->size = GBARegisterBGCNTGetSize(value);
685}
686
687static void GBAVideoSoftwareRendererWriteBGPA(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
688 bg->dx = value;
689}
690
691static void GBAVideoSoftwareRendererWriteBGPB(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
692 bg->dmx = value;
693}
694
695static void GBAVideoSoftwareRendererWriteBGPC(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
696 bg->dy = value;
697}
698
699static void GBAVideoSoftwareRendererWriteBGPD(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
700 bg->dmy = value;
701}
702
703static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
704 bg->refx = (bg->refx & 0xFFFF0000) | value;
705 bg->sx = bg->refx;
706}
707
708static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
709 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
710 bg->refx <<= 4;
711 bg->refx >>= 4;
712 bg->sx = bg->refx;
713}
714
715static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
716 bg->refy = (bg->refy & 0xFFFF0000) | value;
717 bg->sy = bg->refy;
718}
719
720static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
721 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
722 bg->refy <<= 4;
723 bg->refy >>= 4;
724 bg->sy = bg->refy;
725}
726
727static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
728 enum BlendEffect oldEffect = renderer->blendEffect;
729
730 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
731 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
732 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
733 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
734 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
735 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
736 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
737 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
738
739 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
740 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
741 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
742 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
743 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
744
745 if (oldEffect != renderer->blendEffect) {
746 _updatePalettes(renderer);
747 }
748}
749
750#define TEST_LAYER_ENABLED(X) \
751 (renderer->bg[X].enabled && \
752 (GBAWindowControlIsBg ## X ## Enable(renderer->currentWindow.packed) || \
753 (GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt) && GBAWindowControlIsBg ## X ## Enable (renderer->objwin.packed))) && \
754 renderer->bg[X].priority == priority)
755
756static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y) {
757 int w;
758 renderer->end = 0;
759 int spriteLayers = 0;
760 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
761 if (renderer->oamDirty) {
762 _cleanOAM(renderer);
763 }
764 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
765 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
766 int mosaicY = y - (y % mosaicV);
767 for (w = 0; w < renderer->nWindows; ++w) {
768 renderer->start = renderer->end;
769 renderer->end = renderer->windows[w].endX;
770 renderer->currentWindow = renderer->windows[w].control;
771 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
772 continue;
773 }
774 int i;
775 int drawn;
776 for (i = 0; i < renderer->oamMax; ++i) {
777 int localY = y;
778 if (renderer->spriteCyclesRemaining <= 0) {
779 break;
780 }
781 struct GBAVideoSoftwareSprite* sprite = &renderer->sprites[i];
782 if (GBAObjAttributesAIsMosaic(sprite->obj.a)) {
783 localY = mosaicY;
784 }
785 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
786 continue;
787 }
788 drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, localY);
789 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
790 }
791 }
792 }
793
794 unsigned priority;
795 for (priority = 0; priority < 4; ++priority) {
796 renderer->end = 0;
797 for (w = 0; w < renderer->nWindows; ++w) {
798 renderer->start = renderer->end;
799 renderer->end = renderer->windows[w].endX;
800 renderer->currentWindow = renderer->windows[w].control;
801 if (spriteLayers & (1 << priority)) {
802 GBAVideoSoftwareRendererPostprocessSprite(renderer, priority);
803 }
804 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
805 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[0], y);
806 }
807 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
808 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[1], y);
809 }
810 if (TEST_LAYER_ENABLED(2)) {
811 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
812 case 0:
813 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[2], y);
814 break;
815 case 1:
816 case 2:
817 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[2], y);
818 break;
819 case 3:
820 GBAVideoSoftwareRendererDrawBackgroundMode3(renderer, &renderer->bg[2], y);
821 break;
822 case 4:
823 GBAVideoSoftwareRendererDrawBackgroundMode4(renderer, &renderer->bg[2], y);
824 break;
825 case 5:
826 GBAVideoSoftwareRendererDrawBackgroundMode5(renderer, &renderer->bg[2], y);
827 break;
828 }
829 }
830 if (TEST_LAYER_ENABLED(3)) {
831 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
832 case 0:
833 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[3], y);
834 break;
835 case 2:
836 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[3], y);
837 break;
838 }
839 }
840 }
841 }
842 renderer->bg[2].sx += renderer->bg[2].dmx;
843 renderer->bg[2].sy += renderer->bg[2].dmy;
844 renderer->bg[3].sx += renderer->bg[3].dmx;
845 renderer->bg[3].sy += renderer->bg[3].dmy;
846}
847
848static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
849 int i;
850 if (renderer->blendEffect == BLEND_BRIGHTEN) {
851 for (i = 0; i < 512; ++i) {
852 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
853 }
854 } else if (renderer->blendEffect == BLEND_DARKEN) {
855 for (i = 0; i < 512; ++i) {
856 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
857 }
858 } else {
859 for (i = 0; i < 512; ++i) {
860 renderer->variantPalette[i] = renderer->normalPalette[i];
861 }
862 }
863}