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
11#include "util/arm-algo.h"
12#include "util/memory.h"
13
14static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer);
15static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer);
16static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer);
17static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address);
18static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam);
19static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
20static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
21static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y);
22static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer);
23static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, unsigned* stride, const void** pixels);
24static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, unsigned stride, void* pixels);
25
26static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer);
27static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value);
28static void GBAVideoSoftwareRendererWriteBGPA(struct GBAVideoSoftwareBackground* bg, uint16_t value);
29static void GBAVideoSoftwareRendererWriteBGPB(struct GBAVideoSoftwareBackground* bg, uint16_t value);
30static void GBAVideoSoftwareRendererWriteBGPC(struct GBAVideoSoftwareBackground* bg, uint16_t value);
31static void GBAVideoSoftwareRendererWriteBGPD(struct GBAVideoSoftwareBackground* bg, uint16_t value);
32static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value);
33static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value);
34static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value);
35static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value);
36static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value);
37
38static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer);
39static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y);
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
65 renderer->temporaryBuffer = 0;
66}
67
68static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer) {
69 GBAVideoSoftwareRendererReset(renderer);
70
71 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
72
73 int y;
74 for (y = 0; y < VIDEO_VERTICAL_PIXELS; ++y) {
75 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
76 int x;
77 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
78 row[x] = GBA_COLOR_WHITE;
79 }
80 }
81}
82
83static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer) {
84 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
85 int i;
86
87 softwareRenderer->dispcnt = 0x0080;
88
89 softwareRenderer->target1Obj = 0;
90 softwareRenderer->target1Bd = 0;
91 softwareRenderer->target2Obj = 0;
92 softwareRenderer->target2Bd = 0;
93 softwareRenderer->blendEffect = BLEND_NONE;
94 memset(softwareRenderer->normalPalette, 0, sizeof(softwareRenderer->normalPalette));
95 memset(softwareRenderer->variantPalette, 0, sizeof(softwareRenderer->variantPalette));
96
97 softwareRenderer->blda = 0;
98 softwareRenderer->bldb = 0;
99 softwareRenderer->bldy = 0;
100
101 softwareRenderer->winN[0] = (struct WindowN) { .control = { .priority = 0 } };
102 softwareRenderer->winN[1] = (struct WindowN) { .control = { .priority = 1 } };
103 softwareRenderer->objwin = (struct WindowControl) { .priority = 2 };
104 softwareRenderer->winout = (struct WindowControl) { .priority = 3 };
105 softwareRenderer->oamMax = 0;
106
107 softwareRenderer->mosaic = 0;
108
109 for (i = 0; i < 4; ++i) {
110 struct GBAVideoSoftwareBackground* bg = &softwareRenderer->bg[i];
111 bg->index = i;
112 bg->enabled = 0;
113 bg->priority = 0;
114 bg->charBase = 0;
115 bg->mosaic = 0;
116 bg->multipalette = 0;
117 bg->screenBase = 0;
118 bg->overflow = 0;
119 bg->size = 0;
120 bg->target1 = 0;
121 bg->target2 = 0;
122 bg->x = 0;
123 bg->y = 0;
124 bg->refx = 0;
125 bg->refy = 0;
126 bg->dx = 256;
127 bg->dmx = 0;
128 bg->dy = 0;
129 bg->dmy = 256;
130 bg->sx = 0;
131 bg->sy = 0;
132 }
133}
134
135static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer) {
136 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
137 UNUSED(softwareRenderer);
138}
139
140static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
141 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
142 switch (address) {
143 case REG_DISPCNT:
144 softwareRenderer->dispcnt = value;
145 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
146 break;
147 case REG_BG0CNT:
148 value &= 0xFFCF;
149 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
150 break;
151 case REG_BG1CNT:
152 value &= 0xFFCF;
153 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
154 break;
155 case REG_BG2CNT:
156 value &= 0xFFCF;
157 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
158 break;
159 case REG_BG3CNT:
160 value &= 0xFFCF;
161 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
162 break;
163 case REG_BG0HOFS:
164 value &= 0x01FF;
165 softwareRenderer->bg[0].x = value;
166 break;
167 case REG_BG0VOFS:
168 value &= 0x01FF;
169 softwareRenderer->bg[0].y = value;
170 break;
171 case REG_BG1HOFS:
172 value &= 0x01FF;
173 softwareRenderer->bg[1].x = value;
174 break;
175 case REG_BG1VOFS:
176 value &= 0x01FF;
177 softwareRenderer->bg[1].y = value;
178 break;
179 case REG_BG2HOFS:
180 value &= 0x01FF;
181 softwareRenderer->bg[2].x = value;
182 break;
183 case REG_BG2VOFS:
184 value &= 0x01FF;
185 softwareRenderer->bg[2].y = value;
186 break;
187 case REG_BG3HOFS:
188 value &= 0x01FF;
189 softwareRenderer->bg[3].x = value;
190 break;
191 case REG_BG3VOFS:
192 value &= 0x01FF;
193 softwareRenderer->bg[3].y = value;
194 break;
195 case REG_BG2PA:
196 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[2], value);
197 break;
198 case REG_BG2PB:
199 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[2], value);
200 break;
201 case REG_BG2PC:
202 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[2], value);
203 break;
204 case REG_BG2PD:
205 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[2], value);
206 break;
207 case REG_BG2X_LO:
208 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[2], value);
209 break;
210 case REG_BG2X_HI:
211 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[2], value);
212 break;
213 case REG_BG2Y_LO:
214 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[2], value);
215 break;
216 case REG_BG2Y_HI:
217 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[2], value);
218 break;
219 case REG_BG3PA:
220 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[3], value);
221 break;
222 case REG_BG3PB:
223 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[3], value);
224 break;
225 case REG_BG3PC:
226 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[3], value);
227 break;
228 case REG_BG3PD:
229 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[3], value);
230 break;
231 case REG_BG3X_LO:
232 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[3], value);
233 break;
234 case REG_BG3X_HI:
235 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[3], value);
236 break;
237 case REG_BG3Y_LO:
238 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[3], value);
239 break;
240 case REG_BG3Y_HI:
241 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[3], value);
242 break;
243 case REG_BLDCNT:
244 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
245 break;
246 case REG_BLDALPHA:
247 softwareRenderer->blda = value & 0x1F;
248 if (softwareRenderer->blda > 0x10) {
249 softwareRenderer->blda = 0x10;
250 }
251 softwareRenderer->bldb = (value >> 8) & 0x1F;
252 if (softwareRenderer->bldb > 0x10) {
253 softwareRenderer->bldb = 0x10;
254 }
255 break;
256 case REG_BLDY:
257 softwareRenderer->bldy = value & 0x1F;
258 if (softwareRenderer->bldy > 0x10) {
259 softwareRenderer->bldy = 0x10;
260 }
261 _updatePalettes(softwareRenderer);
262 break;
263 case REG_WIN0H:
264 softwareRenderer->winN[0].h.end = value;
265 softwareRenderer->winN[0].h.start = value >> 8;
266 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end) {
267 softwareRenderer->winN[0].h.start = 0;
268 }
269 if (softwareRenderer->winN[0].h.end > VIDEO_HORIZONTAL_PIXELS) {
270 softwareRenderer->winN[0].h.end = VIDEO_HORIZONTAL_PIXELS;
271 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS) {
272 softwareRenderer->winN[0].h.start = VIDEO_HORIZONTAL_PIXELS;
273 }
274 }
275 break;
276 case REG_WIN1H:
277 softwareRenderer->winN[1].h.end = value;
278 softwareRenderer->winN[1].h.start = value >> 8;
279 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end) {
280 softwareRenderer->winN[1].h.start = 0;
281 }
282 if (softwareRenderer->winN[1].h.end > VIDEO_HORIZONTAL_PIXELS) {
283 softwareRenderer->winN[1].h.end = VIDEO_HORIZONTAL_PIXELS;
284 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS) {
285 softwareRenderer->winN[1].h.start = VIDEO_HORIZONTAL_PIXELS;
286 }
287 }
288 break;
289 case REG_WIN0V:
290 softwareRenderer->winN[0].v.end = value;
291 softwareRenderer->winN[0].v.start = value >> 8;
292 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end) {
293 softwareRenderer->winN[0].v.start = 0;
294 }
295 if (softwareRenderer->winN[0].v.end > VIDEO_VERTICAL_PIXELS) {
296 softwareRenderer->winN[0].v.end = VIDEO_VERTICAL_PIXELS;
297 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS) {
298 softwareRenderer->winN[0].v.start = VIDEO_VERTICAL_PIXELS;
299 }
300 }
301 break;
302 case REG_WIN1V:
303 softwareRenderer->winN[1].v.end = value;
304 softwareRenderer->winN[1].v.start = value >> 8;
305 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end) {
306 softwareRenderer->winN[1].v.start = 0;
307 }
308 if (softwareRenderer->winN[1].v.end > VIDEO_VERTICAL_PIXELS) {
309 softwareRenderer->winN[1].v.end = VIDEO_VERTICAL_PIXELS;
310 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS) {
311 softwareRenderer->winN[1].v.start = VIDEO_VERTICAL_PIXELS;
312 }
313 }
314 break;
315 case REG_WININ:
316 softwareRenderer->winN[0].control.packed = value;
317 softwareRenderer->winN[1].control.packed = value >> 8;
318 break;
319 case REG_WINOUT:
320 softwareRenderer->winout.packed = value;
321 softwareRenderer->objwin.packed = value >> 8;
322 break;
323 case REG_MOSAIC:
324 softwareRenderer->mosaic = value;
325 break;
326 case REG_GREENSWP:
327 GBALog(0, GBA_LOG_STUB, "Stub video register write: 0x%03X", address);
328 break;
329 default:
330 GBALog(0, GBA_LOG_GAME_ERROR, "Invalid video register: 0x%03X", address);
331 }
332 return value;
333}
334
335static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
336 UNUSED(renderer);
337 UNUSED(address);
338}
339
340static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
341 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
342 softwareRenderer->oamDirty = 1;
343 UNUSED(oam);
344}
345
346static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
347 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
348#ifdef COLOR_16_BIT
349#ifdef COLOR_5_6_5
350 unsigned color = 0;
351 color |= (value & 0x001F) << 11;
352 color |= (value & 0x03E0) << 1;
353 color |= (value & 0x7C00) >> 10;
354#else
355 unsigned color = value;
356#endif
357#else
358 unsigned color = 0;
359 color |= (value << 3) & 0xF8;
360 color |= (value << 6) & 0xF800;
361 color |= (value << 9) & 0xF80000;
362#endif
363 softwareRenderer->normalPalette[address >> 1] = color;
364 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
365 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
366 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
367 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
368 }
369}
370
371static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
372 if (win->v.end >= win->v.start) {
373 if (y >= win->v.end) {
374 return;
375 }
376 if (y < win->v.start) {
377 return;
378 }
379 } else if (y >= win->v.end && y < win->v.start) {
380 return;
381 }
382 if (win->h.end > VIDEO_HORIZONTAL_PIXELS || win->h.end < win->h.start) {
383 struct WindowN splits[2] = { *win, *win };
384 splits[0].h.start = 0;
385 splits[1].h.end = VIDEO_HORIZONTAL_PIXELS;
386 _breakWindowInner(softwareRenderer, &splits[0]);
387 _breakWindowInner(softwareRenderer, &splits[1]);
388 } else {
389 _breakWindowInner(softwareRenderer, win);
390 }
391}
392
393static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
394 int activeWindow;
395 int startX = 0;
396 if (win->h.end > 0) {
397 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
398 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
399 // Insert a window before the end of the active window
400 struct Window oldWindow = softwareRenderer->windows[activeWindow];
401 if (win->h.start > startX) {
402 // And after the start of the active window
403 int nextWindow = softwareRenderer->nWindows;
404 ++softwareRenderer->nWindows;
405 for (; nextWindow > activeWindow; --nextWindow) {
406 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
407 }
408 softwareRenderer->windows[activeWindow].endX = win->h.start;
409 ++activeWindow;
410 }
411 softwareRenderer->windows[activeWindow].control = win->control;
412 softwareRenderer->windows[activeWindow].endX = win->h.end;
413 if (win->h.end >= oldWindow.endX) {
414 // Trim off extra windows we've overwritten
415 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
416 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
417 GBALog(0, GBA_LOG_FATAL, "Out of bounds window write will occur");
418 return;
419 }
420 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
421 --softwareRenderer->nWindows;
422 }
423 } else {
424 ++activeWindow;
425 int nextWindow = softwareRenderer->nWindows;
426 ++softwareRenderer->nWindows;
427 for (; nextWindow > activeWindow; --nextWindow) {
428 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
429 }
430 softwareRenderer->windows[activeWindow] = oldWindow;
431 }
432 break;
433 }
434 startX = softwareRenderer->windows[activeWindow].endX;
435 }
436 }
437#ifdef DEBUG
438 if (softwareRenderer->nWindows > MAX_WINDOW) {
439 GBALog(0, GBA_LOG_FATAL, "Out of bounds window write occurred!");
440 }
441#endif
442}
443
444static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer) {
445 int i;
446 int oamMax = 0;
447 for (i = 0; i < 128; ++i) {
448 struct GBAObj obj;
449 LOAD_16(obj.a, 0, &renderer->d.oam->obj[i].a);
450 LOAD_16(obj.b, 0, &renderer->d.oam->obj[i].b);
451 LOAD_16(obj.c, 0, &renderer->d.oam->obj[i].c);
452 if (GBAObjAttributesAIsTransformed(obj.a) || !GBAObjAttributesAIsDisable(obj.a)) {
453 int height = GBAVideoObjSizes[GBAObjAttributesAGetShape(obj.a) * 4 + GBAObjAttributesBGetSize(obj.b)][1];
454 if (GBAObjAttributesAIsTransformed(obj.a)) {
455 height <<= GBAObjAttributesAGetDoubleSize(obj.a);
456 }
457 if (GBAObjAttributesAGetY(obj.a) < VIDEO_VERTICAL_PIXELS || GBAObjAttributesAGetY(obj.a) + height >= VIDEO_VERTICAL_TOTAL_PIXELS) {
458 renderer->sprites[oamMax].y = GBAObjAttributesAGetY(obj.a);
459 renderer->sprites[oamMax].endY = GBAObjAttributesAGetY(obj.a) + height;
460 renderer->sprites[oamMax].obj = obj;
461 ++oamMax;
462 }
463 }
464 }
465 renderer->oamMax = oamMax;
466 renderer->oamDirty = 0;
467}
468
469static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
470 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
471
472 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
473 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
474 int x;
475 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
476 row[x] = GBA_COLOR_WHITE;
477 }
478 return;
479 }
480
481 int x;
482 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; x += 4) {
483 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
484 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
485 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
486 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
487 }
488
489 softwareRenderer->windows[0].endX = VIDEO_HORIZONTAL_PIXELS;
490 softwareRenderer->nWindows = 1;
491 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
492 softwareRenderer->windows[0].control = softwareRenderer->winout;
493 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
494 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
495 }
496 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
497 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
498 }
499 } else {
500 softwareRenderer->windows[0].control.packed = 0xFF;
501 }
502
503 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
504
505 int w;
506 x = 0;
507 for (w = 0; w < softwareRenderer->nWindows; ++w) {
508 // TOOD: handle objwin on backdrop
509 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
510 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
511 backdrop |= softwareRenderer->normalPalette[0];
512 } else {
513 backdrop |= softwareRenderer->variantPalette[0];
514 }
515 int end = softwareRenderer->windows[w].endX;
516 for (; x < end; ++x) {
517 softwareRenderer->row[x] = backdrop;
518 }
519 }
520
521 _drawScanline(softwareRenderer, y);
522
523 if (softwareRenderer->target2Bd) {
524 x = 0;
525 for (w = 0; w < softwareRenderer->nWindows; ++w) {
526 uint32_t backdrop = 0;
527 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
528 backdrop |= softwareRenderer->normalPalette[0];
529 } else {
530 backdrop |= softwareRenderer->variantPalette[0];
531 }
532 int end = softwareRenderer->windows[w].endX;
533 for (; x < end; ++x) {
534 uint32_t color = softwareRenderer->row[x];
535 if (color & FLAG_TARGET_1) {
536 softwareRenderer->row[x] = _mix(softwareRenderer->bldb, backdrop, softwareRenderer->blda, color);
537 }
538 }
539 }
540 }
541 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
542 x = 0;
543 for (w = 0; w < softwareRenderer->nWindows; ++w) {
544 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
545 continue;
546 }
547 int end = softwareRenderer->windows[w].endX;
548 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
549 for (; x < end; ++x) {
550 uint32_t color = softwareRenderer->row[x];
551 if ((color & 0xFF000000) == FLAG_REBLEND) {
552 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
553 }
554 }
555 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
556 for (; x < end; ++x) {
557 uint32_t color = softwareRenderer->row[x];
558 if ((color & 0xFF000000) == FLAG_REBLEND) {
559 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
560 }
561 }
562 }
563 }
564 }
565
566#ifdef COLOR_16_BIT
567#if defined(__ARM_NEON) && !defined(__APPLE__)
568 _to16Bit(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS);
569#else
570 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
571 row[x] = softwareRenderer->row[x];
572 }
573#endif
574#else
575 memcpy(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS * sizeof(*row));
576#endif
577}
578
579static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
580 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
581
582 if (softwareRenderer->temporaryBuffer) {
583 mappedMemoryFree(softwareRenderer->temporaryBuffer, VIDEO_HORIZONTAL_PIXELS * VIDEO_VERTICAL_PIXELS * 4);
584 softwareRenderer->temporaryBuffer = 0;
585 }
586 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
587 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
588 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
589 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
590}
591
592static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, unsigned* stride, const void** pixels) {
593 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
594
595#ifdef COLOR_16_BIT
596 *stride = VIDEO_HORIZONTAL_PIXELS;
597 if (!softwareRenderer->temporaryBuffer) {
598 softwareRenderer->temporaryBuffer = anonymousMemoryMap(VIDEO_HORIZONTAL_PIXELS * VIDEO_VERTICAL_PIXELS * 4);
599 }
600 *pixels = softwareRenderer->temporaryBuffer;
601 unsigned y, x;
602 for (y = 0; y < VIDEO_VERTICAL_PIXELS; ++y) {
603 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
604 color_t inColor = softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y + x];
605 uint32_t outColor;
606#ifdef COLOR_5_6_5
607 outColor = (inColor & 0x1F) << 19;
608 outColor |= (inColor & 0x7C0) << 5;
609 outColor |= (inColor & 0xF800) >> 8;
610#else
611 outColor = (inColor & 0x1F) << 3;
612 outColor |= (inColor & 0x3E0) << 6;
613 outColor |= (inColor & 0x7C00) << 9;
614#endif
615 softwareRenderer->temporaryBuffer[VIDEO_HORIZONTAL_PIXELS * y + x] = outColor;
616 }
617 }
618#else
619 *stride = softwareRenderer->outputBufferStride;
620 *pixels = softwareRenderer->outputBuffer;
621#endif
622}
623
624static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, unsigned stride, void* pixels) {
625 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
626
627 uint32_t* colorPixels = pixels;
628 unsigned i;
629 for (i = 0; i < VIDEO_VERTICAL_PIXELS; ++i) {
630#ifdef COLOR_16_BIT
631 unsigned x;
632 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
633 uint32_t inColor = colorPixels[stride * i + x];
634 color_t outColor;
635#ifdef COLOR_5_6_5
636 outColor = (inColor >> 19) & 0x1F;
637 outColor |= (inColor >> 5) & 0x7C0;
638 outColor |= (inColor << 8) & 0xF800;
639#else
640 outColor = (inColor >> 3) & 0x1F;
641 outColor |= (inColor >> 6) & 0x3E0;
642 outColor |= (inColor >> 9) & 0x7C00;
643#endif
644 softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i + x] = outColor;
645 }
646#else
647 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], VIDEO_HORIZONTAL_PIXELS * BYTES_PER_PIXEL);
648#endif
649 }
650}
651
652static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
653 renderer->bg[0].enabled = GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt) && !renderer->d.disableBG[0];
654 renderer->bg[1].enabled = GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt) && !renderer->d.disableBG[1];
655 renderer->bg[2].enabled = GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt) && !renderer->d.disableBG[2];
656 renderer->bg[3].enabled = GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt) && !renderer->d.disableBG[3];
657}
658
659static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
660 UNUSED(renderer);
661 bg->priority = GBARegisterBGCNTGetPriority(value);
662 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
663 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
664 bg->multipalette = GBARegisterBGCNTGet256Color(value);
665 bg->screenBase = GBARegisterBGCNTGetScreenBase(value) << 11;
666 bg->overflow = GBARegisterBGCNTGetOverflow(value);
667 bg->size = GBARegisterBGCNTGetSize(value);
668}
669
670static void GBAVideoSoftwareRendererWriteBGPA(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
671 bg->dx = value;
672}
673
674static void GBAVideoSoftwareRendererWriteBGPB(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
675 bg->dmx = value;
676}
677
678static void GBAVideoSoftwareRendererWriteBGPC(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
679 bg->dy = value;
680}
681
682static void GBAVideoSoftwareRendererWriteBGPD(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
683 bg->dmy = value;
684}
685
686static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
687 bg->refx = (bg->refx & 0xFFFF0000) | value;
688 bg->sx = bg->refx;
689}
690
691static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
692 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
693 bg->refx <<= 4;
694 bg->refx >>= 4;
695 bg->sx = bg->refx;
696}
697
698static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
699 bg->refy = (bg->refy & 0xFFFF0000) | value;
700 bg->sy = bg->refy;
701}
702
703static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
704 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
705 bg->refy <<= 4;
706 bg->refy >>= 4;
707 bg->sy = bg->refy;
708}
709
710static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
711 enum BlendEffect oldEffect = renderer->blendEffect;
712
713 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
714 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
715 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
716 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
717 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
718 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
719 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
720 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
721
722 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
723 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
724 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
725 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
726 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
727
728 renderer->anyTarget2 = value & 0x3F00;
729
730 if (oldEffect != renderer->blendEffect) {
731 _updatePalettes(renderer);
732 }
733}
734
735#define TEST_LAYER_ENABLED(X) \
736 (renderer->bg[X].enabled && \
737 (GBAWindowControlIsBg ## X ## Enable(renderer->currentWindow.packed) || \
738 (GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt) && GBAWindowControlIsBg ## X ## Enable (renderer->objwin.packed))) && \
739 renderer->bg[X].priority == priority)
740
741static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y) {
742 int w;
743 renderer->end = 0;
744 int spriteLayers = 0;
745 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
746 if (renderer->oamDirty) {
747 _cleanOAM(renderer);
748 }
749 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
750 int mosaicY = y - (y % mosaicV);
751 for (w = 0; w < renderer->nWindows; ++w) {
752 renderer->start = renderer->end;
753 renderer->end = renderer->windows[w].endX;
754 renderer->currentWindow = renderer->windows[w].control;
755 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
756 continue;
757 }
758 int i;
759 int drawn;
760 for (i = 0; i < renderer->oamMax; ++i) {
761 int localY = y;
762 struct GBAVideoSoftwareSprite* sprite = &renderer->sprites[i];
763 if (GBAObjAttributesAIsMosaic(sprite->obj.a)) {
764 localY = mosaicY;
765 }
766 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
767 continue;
768 }
769 drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, localY);
770 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
771 }
772 }
773 }
774
775 int priority;
776 for (priority = 0; priority < 4; ++priority) {
777 renderer->end = 0;
778 for (w = 0; w < renderer->nWindows; ++w) {
779 renderer->start = renderer->end;
780 renderer->end = renderer->windows[w].endX;
781 renderer->currentWindow = renderer->windows[w].control;
782 if (spriteLayers & (1 << priority)) {
783 GBAVideoSoftwareRendererPostprocessSprite(renderer, priority);
784 }
785 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
786 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[0], y);
787 }
788 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
789 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[1], y);
790 }
791 if (TEST_LAYER_ENABLED(2)) {
792 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
793 case 0:
794 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[2], y);
795 break;
796 case 1:
797 case 2:
798 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[2], y);
799 break;
800 case 3:
801 GBAVideoSoftwareRendererDrawBackgroundMode3(renderer, &renderer->bg[2], y);
802 break;
803 case 4:
804 GBAVideoSoftwareRendererDrawBackgroundMode4(renderer, &renderer->bg[2], y);
805 break;
806 case 5:
807 GBAVideoSoftwareRendererDrawBackgroundMode5(renderer, &renderer->bg[2], y);
808 break;
809 }
810 }
811 if (TEST_LAYER_ENABLED(3)) {
812 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
813 case 0:
814 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[3], y);
815 break;
816 case 2:
817 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[3], y);
818 break;
819 }
820 }
821 }
822 }
823 renderer->bg[2].sx += renderer->bg[2].dmx;
824 renderer->bg[2].sy += renderer->bg[2].dmy;
825 renderer->bg[3].sx += renderer->bg[3].dmx;
826 renderer->bg[3].sy += renderer->bg[3].dmy;
827}
828
829static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
830 int i;
831 if (renderer->blendEffect == BLEND_BRIGHTEN) {
832 for (i = 0; i < 512; ++i) {
833 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
834 }
835 } else if (renderer->blendEffect == BLEND_DARKEN) {
836 for (i = 0; i < 512; ++i) {
837 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
838 }
839 } else {
840 for (i = 0; i < 512; ++i) {
841 renderer->variantPalette[i] = renderer->normalPalette[i];
842 }
843 }
844}