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 for (i = 0; i < 1024; i += 2) {
95 GBAVideoSoftwareRendererWritePalette(renderer, i, softwareRenderer->d.palette[i >> 1]);
96 }
97 _updatePalettes(softwareRenderer);
98
99 softwareRenderer->blda = 0;
100 softwareRenderer->bldb = 0;
101 softwareRenderer->bldy = 0;
102
103 softwareRenderer->winN[0] = (struct WindowN) { .control = { .priority = 0 } };
104 softwareRenderer->winN[1] = (struct WindowN) { .control = { .priority = 1 } };
105 softwareRenderer->objwin = (struct WindowControl) { .priority = 2 };
106 softwareRenderer->winout = (struct WindowControl) { .priority = 3 };
107 softwareRenderer->oamMax = 0;
108
109 softwareRenderer->mosaic = 0;
110
111 for (i = 0; i < 4; ++i) {
112 struct GBAVideoSoftwareBackground* bg = &softwareRenderer->bg[i];
113 bg->index = i;
114 bg->enabled = 0;
115 bg->priority = 0;
116 bg->charBase = 0;
117 bg->mosaic = 0;
118 bg->multipalette = 0;
119 bg->screenBase = 0;
120 bg->overflow = 0;
121 bg->size = 0;
122 bg->target1 = 0;
123 bg->target2 = 0;
124 bg->x = 0;
125 bg->y = 0;
126 bg->refx = 0;
127 bg->refy = 0;
128 bg->dx = 256;
129 bg->dmx = 0;
130 bg->dy = 0;
131 bg->dmy = 256;
132 bg->sx = 0;
133 bg->sy = 0;
134 }
135}
136
137static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer) {
138 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
139 UNUSED(softwareRenderer);
140}
141
142static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
143 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
144 switch (address) {
145 case REG_DISPCNT:
146 softwareRenderer->dispcnt = value;
147 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
148 break;
149 case REG_BG0CNT:
150 value &= 0xDFFF;
151 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
152 break;
153 case REG_BG1CNT:
154 value &= 0xDFFF;
155 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
156 break;
157 case REG_BG2CNT:
158 value &= 0xFFFF;
159 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
160 break;
161 case REG_BG3CNT:
162 value &= 0xFFFF;
163 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
164 break;
165 case REG_BG0HOFS:
166 value &= 0x01FF;
167 softwareRenderer->bg[0].x = value;
168 break;
169 case REG_BG0VOFS:
170 value &= 0x01FF;
171 softwareRenderer->bg[0].y = value;
172 break;
173 case REG_BG1HOFS:
174 value &= 0x01FF;
175 softwareRenderer->bg[1].x = value;
176 break;
177 case REG_BG1VOFS:
178 value &= 0x01FF;
179 softwareRenderer->bg[1].y = value;
180 break;
181 case REG_BG2HOFS:
182 value &= 0x01FF;
183 softwareRenderer->bg[2].x = value;
184 break;
185 case REG_BG2VOFS:
186 value &= 0x01FF;
187 softwareRenderer->bg[2].y = value;
188 break;
189 case REG_BG3HOFS:
190 value &= 0x01FF;
191 softwareRenderer->bg[3].x = value;
192 break;
193 case REG_BG3VOFS:
194 value &= 0x01FF;
195 softwareRenderer->bg[3].y = value;
196 break;
197 case REG_BG2PA:
198 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[2], value);
199 break;
200 case REG_BG2PB:
201 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[2], value);
202 break;
203 case REG_BG2PC:
204 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[2], value);
205 break;
206 case REG_BG2PD:
207 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[2], value);
208 break;
209 case REG_BG2X_LO:
210 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[2], value);
211 break;
212 case REG_BG2X_HI:
213 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[2], value);
214 break;
215 case REG_BG2Y_LO:
216 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[2], value);
217 break;
218 case REG_BG2Y_HI:
219 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[2], value);
220 break;
221 case REG_BG3PA:
222 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[3], value);
223 break;
224 case REG_BG3PB:
225 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[3], value);
226 break;
227 case REG_BG3PC:
228 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[3], value);
229 break;
230 case REG_BG3PD:
231 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[3], value);
232 break;
233 case REG_BG3X_LO:
234 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[3], value);
235 break;
236 case REG_BG3X_HI:
237 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[3], value);
238 break;
239 case REG_BG3Y_LO:
240 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[3], value);
241 break;
242 case REG_BG3Y_HI:
243 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[3], value);
244 break;
245 case REG_BLDCNT:
246 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
247 value &= 0x3FFF;
248 break;
249 case REG_BLDALPHA:
250 softwareRenderer->blda = value & 0x1F;
251 if (softwareRenderer->blda > 0x10) {
252 softwareRenderer->blda = 0x10;
253 }
254 softwareRenderer->bldb = (value >> 8) & 0x1F;
255 if (softwareRenderer->bldb > 0x10) {
256 softwareRenderer->bldb = 0x10;
257 }
258 value &= 0x1F1F;
259 break;
260 case REG_BLDY:
261 softwareRenderer->bldy = value & 0x1F;
262 if (softwareRenderer->bldy > 0x10) {
263 softwareRenderer->bldy = 0x10;
264 }
265 _updatePalettes(softwareRenderer);
266 break;
267 case REG_WIN0H:
268 softwareRenderer->winN[0].h.end = value;
269 softwareRenderer->winN[0].h.start = value >> 8;
270 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end) {
271 softwareRenderer->winN[0].h.start = 0;
272 }
273 if (softwareRenderer->winN[0].h.end > VIDEO_HORIZONTAL_PIXELS) {
274 softwareRenderer->winN[0].h.end = VIDEO_HORIZONTAL_PIXELS;
275 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS) {
276 softwareRenderer->winN[0].h.start = VIDEO_HORIZONTAL_PIXELS;
277 }
278 }
279 break;
280 case REG_WIN1H:
281 softwareRenderer->winN[1].h.end = value;
282 softwareRenderer->winN[1].h.start = value >> 8;
283 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end) {
284 softwareRenderer->winN[1].h.start = 0;
285 }
286 if (softwareRenderer->winN[1].h.end > VIDEO_HORIZONTAL_PIXELS) {
287 softwareRenderer->winN[1].h.end = VIDEO_HORIZONTAL_PIXELS;
288 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS) {
289 softwareRenderer->winN[1].h.start = VIDEO_HORIZONTAL_PIXELS;
290 }
291 }
292 break;
293 case REG_WIN0V:
294 softwareRenderer->winN[0].v.end = value;
295 softwareRenderer->winN[0].v.start = value >> 8;
296 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end) {
297 softwareRenderer->winN[0].v.start = 0;
298 }
299 if (softwareRenderer->winN[0].v.end > VIDEO_VERTICAL_PIXELS) {
300 softwareRenderer->winN[0].v.end = VIDEO_VERTICAL_PIXELS;
301 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS) {
302 softwareRenderer->winN[0].v.start = VIDEO_VERTICAL_PIXELS;
303 }
304 }
305 break;
306 case REG_WIN1V:
307 softwareRenderer->winN[1].v.end = value;
308 softwareRenderer->winN[1].v.start = value >> 8;
309 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end) {
310 softwareRenderer->winN[1].v.start = 0;
311 }
312 if (softwareRenderer->winN[1].v.end > VIDEO_VERTICAL_PIXELS) {
313 softwareRenderer->winN[1].v.end = VIDEO_VERTICAL_PIXELS;
314 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS) {
315 softwareRenderer->winN[1].v.start = VIDEO_VERTICAL_PIXELS;
316 }
317 }
318 break;
319 case REG_WININ:
320 value &= 0x3F3F;
321 softwareRenderer->winN[0].control.packed = value;
322 softwareRenderer->winN[1].control.packed = value >> 8;
323 break;
324 case REG_WINOUT:
325 value &= 0x3F3F;
326 softwareRenderer->winout.packed = value;
327 softwareRenderer->objwin.packed = value >> 8;
328 break;
329 case REG_MOSAIC:
330 softwareRenderer->mosaic = value;
331 break;
332 case REG_GREENSWP:
333 mLOG(GBA_VIDEO, STUB, "Stub video register write: 0x%03X", address);
334 break;
335 default:
336 mLOG(GBA_VIDEO, GAME_ERROR, "Invalid video register: 0x%03X", address);
337 }
338 return value;
339}
340
341static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
342 if (renderer->cache) {
343 GBAVideoTileCacheWriteVRAM(renderer->cache, address);
344 }
345}
346
347static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
348 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
349 softwareRenderer->oamDirty = 1;
350 UNUSED(oam);
351}
352
353static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
354 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
355#ifdef COLOR_16_BIT
356#ifdef COLOR_5_6_5
357 unsigned color = 0;
358 color |= (value & 0x001F) << 11;
359 color |= (value & 0x03E0) << 1;
360 color |= (value & 0x7C00) >> 10;
361#else
362 unsigned color = value;
363#endif
364#else
365 unsigned color = 0;
366 color |= (value << 3) & 0xF8;
367 color |= (value << 6) & 0xF800;
368 color |= (value << 9) & 0xF80000;
369#endif
370 softwareRenderer->normalPalette[address >> 1] = color;
371 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
372 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
373 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
374 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
375 }
376 if (renderer->cache) {
377 GBAVideoTileCacheWritePalette(renderer->cache, address);
378 }
379}
380
381static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
382 if (win->v.end >= win->v.start) {
383 if (y >= win->v.end) {
384 return;
385 }
386 if (y < win->v.start) {
387 return;
388 }
389 } else if (y >= win->v.end && y < win->v.start) {
390 return;
391 }
392 if (win->h.end > VIDEO_HORIZONTAL_PIXELS || win->h.end < win->h.start) {
393 struct WindowN splits[2] = { *win, *win };
394 splits[0].h.start = 0;
395 splits[1].h.end = VIDEO_HORIZONTAL_PIXELS;
396 _breakWindowInner(softwareRenderer, &splits[0]);
397 _breakWindowInner(softwareRenderer, &splits[1]);
398 } else {
399 _breakWindowInner(softwareRenderer, win);
400 }
401}
402
403static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
404 int activeWindow;
405 int startX = 0;
406 if (win->h.end > 0) {
407 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
408 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
409 // Insert a window before the end of the active window
410 struct Window oldWindow = softwareRenderer->windows[activeWindow];
411 if (win->h.start > startX) {
412 // And after the start of the active window
413 int nextWindow = softwareRenderer->nWindows;
414 ++softwareRenderer->nWindows;
415 for (; nextWindow > activeWindow; --nextWindow) {
416 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
417 }
418 softwareRenderer->windows[activeWindow].endX = win->h.start;
419 ++activeWindow;
420 }
421 softwareRenderer->windows[activeWindow].control = win->control;
422 softwareRenderer->windows[activeWindow].endX = win->h.end;
423 if (win->h.end >= oldWindow.endX) {
424 // Trim off extra windows we've overwritten
425 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
426 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
427 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write will occur");
428 return;
429 }
430 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
431 --softwareRenderer->nWindows;
432 }
433 } else {
434 ++activeWindow;
435 int nextWindow = softwareRenderer->nWindows;
436 ++softwareRenderer->nWindows;
437 for (; nextWindow > activeWindow; --nextWindow) {
438 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
439 }
440 softwareRenderer->windows[activeWindow] = oldWindow;
441 }
442 break;
443 }
444 startX = softwareRenderer->windows[activeWindow].endX;
445 }
446 }
447#ifdef DEBUG
448 if (softwareRenderer->nWindows > MAX_WINDOW) {
449 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write occurred!");
450 }
451#endif
452}
453
454static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer) {
455 int i;
456 int oamMax = 0;
457 for (i = 0; i < 128; ++i) {
458 struct GBAObj obj;
459 LOAD_16(obj.a, 0, &renderer->d.oam->obj[i].a);
460 LOAD_16(obj.b, 0, &renderer->d.oam->obj[i].b);
461 LOAD_16(obj.c, 0, &renderer->d.oam->obj[i].c);
462 if (GBAObjAttributesAIsTransformed(obj.a) || !GBAObjAttributesAIsDisable(obj.a)) {
463 int height = GBAVideoObjSizes[GBAObjAttributesAGetShape(obj.a) * 4 + GBAObjAttributesBGetSize(obj.b)][1];
464 if (GBAObjAttributesAIsTransformed(obj.a)) {
465 height <<= GBAObjAttributesAGetDoubleSize(obj.a);
466 }
467 if (GBAObjAttributesAGetY(obj.a) < VIDEO_VERTICAL_PIXELS || GBAObjAttributesAGetY(obj.a) + height >= VIDEO_VERTICAL_TOTAL_PIXELS) {
468 renderer->sprites[oamMax].y = GBAObjAttributesAGetY(obj.a);
469 renderer->sprites[oamMax].endY = GBAObjAttributesAGetY(obj.a) + height;
470 renderer->sprites[oamMax].obj = obj;
471 ++oamMax;
472 }
473 }
474 }
475 renderer->oamMax = oamMax;
476 renderer->oamDirty = 0;
477}
478
479static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
480 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
481
482 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
483 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
484 int x;
485 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
486 row[x] = GBA_COLOR_WHITE;
487 }
488 return;
489 }
490
491 int x;
492 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; x += 4) {
493 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
494 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
495 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
496 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
497 }
498
499 softwareRenderer->windows[0].endX = VIDEO_HORIZONTAL_PIXELS;
500 softwareRenderer->nWindows = 1;
501 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
502 softwareRenderer->windows[0].control = softwareRenderer->winout;
503 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
504 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
505 }
506 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
507 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
508 }
509 } else {
510 softwareRenderer->windows[0].control.packed = 0xFF;
511 }
512
513 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
514
515 int w;
516 x = 0;
517 for (w = 0; w < softwareRenderer->nWindows; ++w) {
518 // TOOD: handle objwin on backdrop
519 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
520 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
521 backdrop |= softwareRenderer->normalPalette[0];
522 } else {
523 backdrop |= softwareRenderer->variantPalette[0];
524 }
525 int end = softwareRenderer->windows[w].endX;
526 for (; x < end - 3; x += 4) {
527 softwareRenderer->row[x] = backdrop;
528 softwareRenderer->row[x + 1] = backdrop;
529 softwareRenderer->row[x + 2] = backdrop;
530 softwareRenderer->row[x + 3] = backdrop;
531 }
532 for (; x < end; ++x) {
533 softwareRenderer->row[x] = backdrop;
534 }
535 }
536
537 _drawScanline(softwareRenderer, y);
538
539 if (softwareRenderer->target2Bd) {
540 x = 0;
541 for (w = 0; w < softwareRenderer->nWindows; ++w) {
542 uint32_t backdrop = 0;
543 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
544 backdrop |= softwareRenderer->normalPalette[0];
545 } else {
546 backdrop |= softwareRenderer->variantPalette[0];
547 }
548 int end = softwareRenderer->windows[w].endX;
549 for (; x < end; ++x) {
550 uint32_t color = softwareRenderer->row[x];
551 if (color & FLAG_TARGET_1) {
552 softwareRenderer->row[x] = _mix(softwareRenderer->bldb, backdrop, softwareRenderer->blda, color);
553 }
554 }
555 }
556 }
557 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
558 x = 0;
559 for (w = 0; w < softwareRenderer->nWindows; ++w) {
560 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
561 continue;
562 }
563 int end = softwareRenderer->windows[w].endX;
564 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
565 for (; x < end; ++x) {
566 uint32_t color = softwareRenderer->row[x];
567 if ((color & 0xFF000000) == FLAG_REBLEND) {
568 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
569 }
570 }
571 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
572 for (; x < end; ++x) {
573 uint32_t color = softwareRenderer->row[x];
574 if ((color & 0xFF000000) == FLAG_REBLEND) {
575 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
576 }
577 }
578 }
579 }
580 }
581
582#ifdef COLOR_16_BIT
583#if defined(__ARM_NEON) && !defined(__APPLE__)
584 _to16Bit(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS);
585#else
586 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
587 row[x] = softwareRenderer->row[x];
588 }
589#endif
590#else
591 memcpy(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS * sizeof(*row));
592#endif
593}
594
595static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
596 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
597
598 if (softwareRenderer->temporaryBuffer) {
599 mappedMemoryFree(softwareRenderer->temporaryBuffer, VIDEO_HORIZONTAL_PIXELS * VIDEO_VERTICAL_PIXELS * 4);
600 softwareRenderer->temporaryBuffer = 0;
601 }
602 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
603 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
604 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
605 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
606}
607
608static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, unsigned* stride, const void** pixels) {
609 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
610
611#ifdef COLOR_16_BIT
612 *stride = VIDEO_HORIZONTAL_PIXELS;
613 if (!softwareRenderer->temporaryBuffer) {
614 softwareRenderer->temporaryBuffer = anonymousMemoryMap(VIDEO_HORIZONTAL_PIXELS * VIDEO_VERTICAL_PIXELS * 4);
615 }
616 *pixels = softwareRenderer->temporaryBuffer;
617 unsigned y, x;
618 for (y = 0; y < VIDEO_VERTICAL_PIXELS; ++y) {
619 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
620 color_t inColor = softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y + x];
621 uint32_t outColor;
622#ifdef COLOR_5_6_5
623 outColor = (inColor & 0x1F) << 19;
624 outColor |= (inColor & 0x7C0) << 5;
625 outColor |= (inColor & 0xF800) >> 8;
626#else
627 outColor = (inColor & 0x1F) << 3;
628 outColor |= (inColor & 0x3E0) << 6;
629 outColor |= (inColor & 0x7C00) << 9;
630#endif
631 softwareRenderer->temporaryBuffer[VIDEO_HORIZONTAL_PIXELS * y + x] = outColor;
632 }
633 }
634#else
635 *stride = softwareRenderer->outputBufferStride;
636 *pixels = softwareRenderer->outputBuffer;
637#endif
638}
639
640static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, unsigned stride, void* pixels) {
641 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
642
643 uint32_t* colorPixels = pixels;
644 unsigned i;
645 for (i = 0; i < VIDEO_VERTICAL_PIXELS; ++i) {
646#ifdef COLOR_16_BIT
647 unsigned x;
648 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
649 uint32_t inColor = colorPixels[stride * i + x];
650 color_t outColor;
651#ifdef COLOR_5_6_5
652 outColor = (inColor >> 19) & 0x1F;
653 outColor |= (inColor >> 5) & 0x7C0;
654 outColor |= (inColor << 8) & 0xF800;
655#else
656 outColor = (inColor >> 3) & 0x1F;
657 outColor |= (inColor >> 6) & 0x3E0;
658 outColor |= (inColor >> 9) & 0x7C00;
659#endif
660 softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i + x] = outColor;
661 }
662#else
663 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], VIDEO_HORIZONTAL_PIXELS * BYTES_PER_PIXEL);
664#endif
665 }
666}
667
668static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
669 renderer->bg[0].enabled = GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt) && !renderer->d.disableBG[0];
670 renderer->bg[1].enabled = GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt) && !renderer->d.disableBG[1];
671 renderer->bg[2].enabled = GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt) && !renderer->d.disableBG[2];
672 renderer->bg[3].enabled = GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt) && !renderer->d.disableBG[3];
673}
674
675static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
676 UNUSED(renderer);
677 bg->priority = GBARegisterBGCNTGetPriority(value);
678 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
679 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
680 bg->multipalette = GBARegisterBGCNTGet256Color(value);
681 bg->screenBase = GBARegisterBGCNTGetScreenBase(value) << 11;
682 bg->overflow = GBARegisterBGCNTGetOverflow(value);
683 bg->size = GBARegisterBGCNTGetSize(value);
684}
685
686static void GBAVideoSoftwareRendererWriteBGPA(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
687 bg->dx = value;
688}
689
690static void GBAVideoSoftwareRendererWriteBGPB(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
691 bg->dmx = value;
692}
693
694static void GBAVideoSoftwareRendererWriteBGPC(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
695 bg->dy = value;
696}
697
698static void GBAVideoSoftwareRendererWriteBGPD(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
699 bg->dmy = value;
700}
701
702static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
703 bg->refx = (bg->refx & 0xFFFF0000) | value;
704 bg->sx = bg->refx;
705}
706
707static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
708 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
709 bg->refx <<= 4;
710 bg->refx >>= 4;
711 bg->sx = bg->refx;
712}
713
714static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
715 bg->refy = (bg->refy & 0xFFFF0000) | value;
716 bg->sy = bg->refy;
717}
718
719static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
720 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
721 bg->refy <<= 4;
722 bg->refy >>= 4;
723 bg->sy = bg->refy;
724}
725
726static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
727 enum BlendEffect oldEffect = renderer->blendEffect;
728
729 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
730 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
731 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
732 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
733 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
734 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
735 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
736 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
737
738 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
739 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
740 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
741 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
742 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
743
744 if (oldEffect != renderer->blendEffect) {
745 _updatePalettes(renderer);
746 }
747}
748
749#define TEST_LAYER_ENABLED(X) \
750 (renderer->bg[X].enabled && \
751 (GBAWindowControlIsBg ## X ## Enable(renderer->currentWindow.packed) || \
752 (GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt) && GBAWindowControlIsBg ## X ## Enable (renderer->objwin.packed))) && \
753 renderer->bg[X].priority == priority)
754
755static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y) {
756 int w;
757 renderer->end = 0;
758 int spriteLayers = 0;
759 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
760 if (renderer->oamDirty) {
761 _cleanOAM(renderer);
762 }
763 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
764 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
765 int mosaicY = y - (y % mosaicV);
766 for (w = 0; w < renderer->nWindows; ++w) {
767 renderer->start = renderer->end;
768 renderer->end = renderer->windows[w].endX;
769 renderer->currentWindow = renderer->windows[w].control;
770 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
771 continue;
772 }
773 int i;
774 int drawn;
775 for (i = 0; i < renderer->oamMax; ++i) {
776 int localY = y;
777 if (renderer->spriteCyclesRemaining <= 0) {
778 break;
779 }
780 struct GBAVideoSoftwareSprite* sprite = &renderer->sprites[i];
781 if (GBAObjAttributesAIsMosaic(sprite->obj.a)) {
782 localY = mosaicY;
783 }
784 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
785 continue;
786 }
787 drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, localY);
788 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
789 }
790 }
791 }
792
793 unsigned priority;
794 for (priority = 0; priority < 4; ++priority) {
795 renderer->end = 0;
796 for (w = 0; w < renderer->nWindows; ++w) {
797 renderer->start = renderer->end;
798 renderer->end = renderer->windows[w].endX;
799 renderer->currentWindow = renderer->windows[w].control;
800 if (spriteLayers & (1 << priority)) {
801 GBAVideoSoftwareRendererPostprocessSprite(renderer, priority);
802 }
803 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
804 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[0], y);
805 }
806 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
807 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[1], y);
808 }
809 if (TEST_LAYER_ENABLED(2)) {
810 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
811 case 0:
812 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[2], y);
813 break;
814 case 1:
815 case 2:
816 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[2], y);
817 break;
818 case 3:
819 GBAVideoSoftwareRendererDrawBackgroundMode3(renderer, &renderer->bg[2], y);
820 break;
821 case 4:
822 GBAVideoSoftwareRendererDrawBackgroundMode4(renderer, &renderer->bg[2], y);
823 break;
824 case 5:
825 GBAVideoSoftwareRendererDrawBackgroundMode5(renderer, &renderer->bg[2], y);
826 break;
827 }
828 }
829 if (TEST_LAYER_ENABLED(3)) {
830 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
831 case 0:
832 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[3], y);
833 break;
834 case 2:
835 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[3], y);
836 break;
837 }
838 }
839 }
840 }
841 renderer->bg[2].sx += renderer->bg[2].dmx;
842 renderer->bg[2].sy += renderer->bg[2].dmy;
843 renderer->bg[3].sx += renderer->bg[3].dmx;
844 renderer->bg[3].sy += renderer->bg[3].dmy;
845}
846
847static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
848 int i;
849 if (renderer->blendEffect == BLEND_BRIGHTEN) {
850 for (i = 0; i < 512; ++i) {
851 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
852 }
853 } else if (renderer->blendEffect == BLEND_DARKEN) {
854 for (i = 0; i < 512; ++i) {
855 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
856 }
857 } else {
858 for (i = 0; i < 512; ++i) {
859 renderer->variantPalette[i] = renderer->normalPalette[i];
860 }
861 }
862}