src/gba/renderers/video-software.c (view raw)
1/* Copyright (c) 2013-2015 Jeffrey Pfau
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6#include "gba/renderers/software-private.h"
7
8#include <mgba/core/tile-cache.h>
9#include <mgba/internal/arm/macros.h>
10#include <mgba/internal/gba/io.h>
11
12#include <mgba-util/arm-algo.h>
13#include <mgba-util/memory.h>
14
15static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer);
16static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer);
17static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer);
18static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address);
19static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam);
20static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
21static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
22static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y);
23static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer);
24static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels);
25static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels);
26
27static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer);
28static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value);
29static void GBAVideoSoftwareRendererWriteBGPA(struct GBAVideoSoftwareBackground* bg, uint16_t value);
30static void GBAVideoSoftwareRendererWriteBGPB(struct GBAVideoSoftwareBackground* bg, uint16_t value);
31static void GBAVideoSoftwareRendererWriteBGPC(struct GBAVideoSoftwareBackground* bg, uint16_t value);
32static void GBAVideoSoftwareRendererWriteBGPD(struct GBAVideoSoftwareBackground* bg, uint16_t value);
33static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value);
34static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value);
35static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value);
36static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value);
37static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value);
38
39static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer);
40
41static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer);
42
43static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y);
44static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win);
45
46void GBAVideoSoftwareRendererCreate(struct GBAVideoSoftwareRenderer* renderer) {
47 renderer->d.init = GBAVideoSoftwareRendererInit;
48 renderer->d.reset = GBAVideoSoftwareRendererReset;
49 renderer->d.deinit = GBAVideoSoftwareRendererDeinit;
50 renderer->d.writeVideoRegister = GBAVideoSoftwareRendererWriteVideoRegister;
51 renderer->d.writeVRAM = GBAVideoSoftwareRendererWriteVRAM;
52 renderer->d.writeOAM = GBAVideoSoftwareRendererWriteOAM;
53 renderer->d.writePalette = GBAVideoSoftwareRendererWritePalette;
54 renderer->d.drawScanline = GBAVideoSoftwareRendererDrawScanline;
55 renderer->d.finishFrame = GBAVideoSoftwareRendererFinishFrame;
56 renderer->d.getPixels = GBAVideoSoftwareRendererGetPixels;
57 renderer->d.putPixels = GBAVideoSoftwareRendererPutPixels;
58
59 renderer->d.disableBG[0] = false;
60 renderer->d.disableBG[1] = false;
61 renderer->d.disableBG[2] = false;
62 renderer->d.disableBG[3] = false;
63 renderer->d.disableOBJ = false;
64 renderer->tileStride = 0x20;
65 renderer->masterEnd = VIDEO_HORIZONTAL_PIXELS;
66 renderer->masterHeight = VIDEO_VERTICAL_PIXELS;
67 renderer->masterScanlines = VIDEO_VERTICAL_TOTAL_PIXELS;
68
69 renderer->temporaryBuffer = 0;
70}
71
72static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer) {
73 GBAVideoSoftwareRendererReset(renderer);
74
75 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
76
77 int y;
78 for (y = 0; y < softwareRenderer->masterEnd; ++y) {
79 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
80 int x;
81 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
82 row[x] = GBA_COLOR_WHITE;
83 }
84 }
85}
86
87static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer) {
88 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
89 int i;
90
91 softwareRenderer->dispcnt = 0x0080;
92
93 softwareRenderer->target1Obj = 0;
94 softwareRenderer->target1Bd = 0;
95 softwareRenderer->target2Obj = 0;
96 softwareRenderer->target2Bd = 0;
97 softwareRenderer->blendEffect = BLEND_NONE;
98 for (i = 0; i < 1024; i += 2) {
99 uint16_t entry;
100 LOAD_16(entry, i, softwareRenderer->d.palette);
101 GBAVideoSoftwareRendererWritePalette(renderer, i, entry);
102 }
103 softwareRenderer->objExtPalette = NULL;
104 softwareRenderer->objExtVariantPalette = NULL;
105 _updatePalettes(softwareRenderer);
106
107 softwareRenderer->blda = 0;
108 softwareRenderer->bldb = 0;
109 softwareRenderer->bldy = 0;
110
111 softwareRenderer->winN[0] = (struct WindowN) { .control = { .priority = 0 } };
112 softwareRenderer->winN[1] = (struct WindowN) { .control = { .priority = 1 } };
113 softwareRenderer->objwin = (struct WindowControl) { .priority = 2 };
114 softwareRenderer->winout = (struct WindowControl) { .priority = 3 };
115 softwareRenderer->oamMax = 0;
116
117 softwareRenderer->mosaic = 0;
118
119 for (i = 0; i < 4; ++i) {
120 struct GBAVideoSoftwareBackground* bg = &softwareRenderer->bg[i];
121 bg->index = i;
122 bg->enabled = 0;
123 bg->priority = 0;
124 bg->charBase = 0;
125 bg->mosaic = 0;
126 bg->multipalette = 0;
127 bg->screenBase = 0;
128 bg->overflow = 0;
129 bg->size = 0;
130 bg->target1 = 0;
131 bg->target2 = 0;
132 bg->x = 0;
133 bg->y = 0;
134 bg->refx = 0;
135 bg->refy = 0;
136 bg->dx = 256;
137 bg->dmx = 0;
138 bg->dy = 0;
139 bg->dmy = 256;
140 bg->sx = 0;
141 bg->sy = 0;
142 bg->extPalette = NULL;
143 bg->variantPalette = NULL;
144 }
145}
146
147static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer) {
148 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
149 UNUSED(softwareRenderer);
150}
151
152static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
153 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
154 switch (address) {
155 case REG_DISPCNT:
156 softwareRenderer->dispcnt = value;
157 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
158 break;
159 case REG_BG0CNT:
160 value &= 0xDFFF;
161 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
162 break;
163 case REG_BG1CNT:
164 value &= 0xDFFF;
165 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
166 break;
167 case REG_BG2CNT:
168 value &= 0xFFFF;
169 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
170 break;
171 case REG_BG3CNT:
172 value &= 0xFFFF;
173 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
174 break;
175 case REG_BG0HOFS:
176 value &= 0x01FF;
177 softwareRenderer->bg[0].x = value;
178 break;
179 case REG_BG0VOFS:
180 value &= 0x01FF;
181 softwareRenderer->bg[0].y = value;
182 break;
183 case REG_BG1HOFS:
184 value &= 0x01FF;
185 softwareRenderer->bg[1].x = value;
186 break;
187 case REG_BG1VOFS:
188 value &= 0x01FF;
189 softwareRenderer->bg[1].y = value;
190 break;
191 case REG_BG2HOFS:
192 value &= 0x01FF;
193 softwareRenderer->bg[2].x = value;
194 break;
195 case REG_BG2VOFS:
196 value &= 0x01FF;
197 softwareRenderer->bg[2].y = value;
198 break;
199 case REG_BG3HOFS:
200 value &= 0x01FF;
201 softwareRenderer->bg[3].x = value;
202 break;
203 case REG_BG3VOFS:
204 value &= 0x01FF;
205 softwareRenderer->bg[3].y = value;
206 break;
207 case REG_BG2PA:
208 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[2], value);
209 break;
210 case REG_BG2PB:
211 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[2], value);
212 break;
213 case REG_BG2PC:
214 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[2], value);
215 break;
216 case REG_BG2PD:
217 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[2], value);
218 break;
219 case REG_BG2X_LO:
220 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[2], value);
221 break;
222 case REG_BG2X_HI:
223 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[2], value);
224 break;
225 case REG_BG2Y_LO:
226 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[2], value);
227 break;
228 case REG_BG2Y_HI:
229 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[2], value);
230 break;
231 case REG_BG3PA:
232 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[3], value);
233 break;
234 case REG_BG3PB:
235 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[3], value);
236 break;
237 case REG_BG3PC:
238 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[3], value);
239 break;
240 case REG_BG3PD:
241 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[3], value);
242 break;
243 case REG_BG3X_LO:
244 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[3], value);
245 break;
246 case REG_BG3X_HI:
247 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[3], value);
248 break;
249 case REG_BG3Y_LO:
250 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[3], value);
251 break;
252 case REG_BG3Y_HI:
253 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[3], value);
254 break;
255 case REG_BLDCNT:
256 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
257 value &= 0x3FFF;
258 break;
259 case REG_BLDALPHA:
260 softwareRenderer->blda = value & 0x1F;
261 if (softwareRenderer->blda > 0x10) {
262 softwareRenderer->blda = 0x10;
263 }
264 softwareRenderer->bldb = (value >> 8) & 0x1F;
265 if (softwareRenderer->bldb > 0x10) {
266 softwareRenderer->bldb = 0x10;
267 }
268 value &= 0x1F1F;
269 break;
270 case REG_BLDY:
271 softwareRenderer->bldy = value & 0x1F;
272 if (softwareRenderer->bldy > 0x10) {
273 softwareRenderer->bldy = 0x10;
274 }
275 _updatePalettes(softwareRenderer);
276 break;
277 case REG_WIN0H:
278 softwareRenderer->winN[0].h.end = value;
279 softwareRenderer->winN[0].h.start = value >> 8;
280 if (softwareRenderer->winN[0].h.start > softwareRenderer->masterEnd && softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end) {
281 softwareRenderer->winN[0].h.start = 0;
282 }
283 if (softwareRenderer->winN[0].h.end > softwareRenderer->masterEnd) {
284 softwareRenderer->winN[0].h.end = softwareRenderer->masterEnd;
285 if (softwareRenderer->winN[0].h.start > softwareRenderer->masterEnd) {
286 softwareRenderer->winN[0].h.start = softwareRenderer->masterEnd;
287 }
288 }
289 break;
290 case REG_WIN1H:
291 softwareRenderer->winN[1].h.end = value;
292 softwareRenderer->winN[1].h.start = value >> 8;
293 if (softwareRenderer->winN[1].h.start > softwareRenderer->masterEnd && softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end) {
294 softwareRenderer->winN[1].h.start = 0;
295 }
296 if (softwareRenderer->winN[1].h.end > softwareRenderer->masterEnd) {
297 softwareRenderer->winN[1].h.end = softwareRenderer->masterEnd;
298 if (softwareRenderer->winN[1].h.start > softwareRenderer->masterEnd) {
299 softwareRenderer->winN[1].h.start = softwareRenderer->masterEnd;
300 }
301 }
302 break;
303 case REG_WIN0V:
304 softwareRenderer->winN[0].v.end = value;
305 softwareRenderer->winN[0].v.start = value >> 8;
306 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end) {
307 softwareRenderer->winN[0].v.start = 0;
308 }
309 if (softwareRenderer->winN[0].v.end > VIDEO_VERTICAL_PIXELS) {
310 softwareRenderer->winN[0].v.end = VIDEO_VERTICAL_PIXELS;
311 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS) {
312 softwareRenderer->winN[0].v.start = VIDEO_VERTICAL_PIXELS;
313 }
314 }
315 break;
316 case REG_WIN1V:
317 softwareRenderer->winN[1].v.end = value;
318 softwareRenderer->winN[1].v.start = value >> 8;
319 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end) {
320 softwareRenderer->winN[1].v.start = 0;
321 }
322 if (softwareRenderer->winN[1].v.end > VIDEO_VERTICAL_PIXELS) {
323 softwareRenderer->winN[1].v.end = VIDEO_VERTICAL_PIXELS;
324 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS) {
325 softwareRenderer->winN[1].v.start = VIDEO_VERTICAL_PIXELS;
326 }
327 }
328 break;
329 case REG_WININ:
330 value &= 0x3F3F;
331 softwareRenderer->winN[0].control.packed = value;
332 softwareRenderer->winN[1].control.packed = value >> 8;
333 break;
334 case REG_WINOUT:
335 value &= 0x3F3F;
336 softwareRenderer->winout.packed = value;
337 softwareRenderer->objwin.packed = value >> 8;
338 break;
339 case REG_MOSAIC:
340 softwareRenderer->mosaic = value;
341 break;
342 case REG_GREENSWP:
343 mLOG(GBA_VIDEO, STUB, "Stub video register write: 0x%03X", address);
344 break;
345 default:
346 mLOG(GBA_VIDEO, GAME_ERROR, "Invalid video register: 0x%03X", address);
347 }
348 return value;
349}
350
351static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
352 if (renderer->cache) {
353 mTileCacheWriteVRAM(renderer->cache, address);
354 }
355}
356
357static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
358 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
359 softwareRenderer->oamDirty = 1;
360 UNUSED(oam);
361}
362
363static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
364 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
365#ifdef COLOR_16_BIT
366#ifdef COLOR_5_6_5
367 unsigned color = 0;
368 color |= (value & 0x001F) << 11;
369 color |= (value & 0x03E0) << 1;
370 color |= (value & 0x7C00) >> 10;
371#else
372 unsigned color = value;
373#endif
374#else
375 unsigned color = 0;
376 color |= (value << 3) & 0xF8;
377 color |= (value << 6) & 0xF800;
378 color |= (value << 9) & 0xF80000;
379 color |= (color >> 5) & 0x070707;
380#endif
381 softwareRenderer->normalPalette[address >> 1] = color;
382 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
383 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
384 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
385 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
386 }
387 if (renderer->cache) {
388 mTileCacheWritePalette(renderer->cache, address);
389 }
390}
391
392static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
393 if (win->v.end >= win->v.start) {
394 if (y >= win->v.end) {
395 return;
396 }
397 if (y < win->v.start) {
398 return;
399 }
400 } else if (y >= win->v.end && y < win->v.start) {
401 return;
402 }
403 if (win->h.end > softwareRenderer->masterEnd || win->h.end < win->h.start) {
404 struct WindowN splits[2] = { *win, *win };
405 splits[0].h.start = 0;
406 splits[1].h.end = softwareRenderer->masterEnd;
407 _breakWindowInner(softwareRenderer, &splits[0]);
408 _breakWindowInner(softwareRenderer, &splits[1]);
409 } else {
410 _breakWindowInner(softwareRenderer, win);
411 }
412}
413
414static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
415 int activeWindow;
416 int startX = 0;
417 if (win->h.end > 0) {
418 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
419 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
420 // Insert a window before the end of the active window
421 struct Window oldWindow = softwareRenderer->windows[activeWindow];
422 if (win->h.start > startX) {
423 // And after the start of the active window
424 int nextWindow = softwareRenderer->nWindows;
425 ++softwareRenderer->nWindows;
426 for (; nextWindow > activeWindow; --nextWindow) {
427 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
428 }
429 softwareRenderer->windows[activeWindow].endX = win->h.start;
430 ++activeWindow;
431 }
432 softwareRenderer->windows[activeWindow].control = win->control;
433 softwareRenderer->windows[activeWindow].endX = win->h.end;
434 if (win->h.end >= oldWindow.endX) {
435 // Trim off extra windows we've overwritten
436 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
437 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
438 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write will occur");
439 return;
440 }
441 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
442 --softwareRenderer->nWindows;
443 }
444 } else {
445 ++activeWindow;
446 int nextWindow = softwareRenderer->nWindows;
447 ++softwareRenderer->nWindows;
448 for (; nextWindow > activeWindow; --nextWindow) {
449 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
450 }
451 softwareRenderer->windows[activeWindow] = oldWindow;
452 }
453 break;
454 }
455 startX = softwareRenderer->windows[activeWindow].endX;
456 }
457 }
458#ifdef DEBUG
459 if (softwareRenderer->nWindows > MAX_WINDOW) {
460 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write occurred!");
461 }
462#endif
463}
464
465static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer) {
466 int i;
467 int oamMax = 0;
468 for (i = 0; i < 128; ++i) {
469 struct GBAObj obj;
470 LOAD_16(obj.a, 0, &renderer->d.oam->obj[i].a);
471 LOAD_16(obj.b, 0, &renderer->d.oam->obj[i].b);
472 LOAD_16(obj.c, 0, &renderer->d.oam->obj[i].c);
473 if (GBAObjAttributesAIsTransformed(obj.a) || !GBAObjAttributesAIsDisable(obj.a)) {
474 int height = GBAVideoObjSizes[GBAObjAttributesAGetShape(obj.a) * 4 + GBAObjAttributesBGetSize(obj.b)][1];
475 if (GBAObjAttributesAIsTransformed(obj.a)) {
476 height <<= GBAObjAttributesAGetDoubleSize(obj.a);
477 }
478 if (GBAObjAttributesAGetY(obj.a) < renderer->masterHeight || GBAObjAttributesAGetY(obj.a) + height >= renderer->masterScanlines) {
479 renderer->sprites[oamMax].y = GBAObjAttributesAGetY(obj.a);
480 renderer->sprites[oamMax].endY = GBAObjAttributesAGetY(obj.a) + height;
481 renderer->sprites[oamMax].obj = obj;
482 ++oamMax;
483 }
484 }
485 }
486 renderer->oamMax = oamMax;
487 renderer->oamDirty = 0;
488}
489
490static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
491 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
492
493 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
494 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
495 int x;
496 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
497 row[x] = GBA_COLOR_WHITE;
498 }
499 return;
500 }
501
502 uint16_t* objVramBase = softwareRenderer->d.vramOBJ[0];
503 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) >= 3) {
504 softwareRenderer->d.vramOBJ[0] = NULL; // OBJ VRAM bottom is blocked in bitmap modes
505 }
506
507 GBAVideoSoftwareRendererPreprocessBuffer(softwareRenderer, y);
508 int spriteLayers = GBAVideoSoftwareRendererPreprocessSpriteLayer(softwareRenderer, y);
509 softwareRenderer->d.vramOBJ[0] = objVramBase;
510
511 int w;
512 unsigned priority;
513 for (priority = 0; priority < 4; ++priority) {
514 softwareRenderer->end = 0;
515 for (w = 0; w < softwareRenderer->nWindows; ++w) {
516 softwareRenderer->start = softwareRenderer->end;
517 softwareRenderer->end = softwareRenderer->windows[w].endX;
518 softwareRenderer->currentWindow = softwareRenderer->windows[w].control;
519 if (spriteLayers & (1 << priority)) {
520 GBAVideoSoftwareRendererPostprocessSprite(softwareRenderer, priority);
521 }
522 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
523 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[0], y);
524 }
525 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
526 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[1], y);
527 }
528 if (TEST_LAYER_ENABLED(2)) {
529 switch (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt)) {
530 case 0:
531 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[2], y);
532 break;
533 case 1:
534 case 2:
535 GBAVideoSoftwareRendererDrawBackgroundMode2(softwareRenderer, &softwareRenderer->bg[2], y);
536 break;
537 case 3:
538 GBAVideoSoftwareRendererDrawBackgroundMode3(softwareRenderer, &softwareRenderer->bg[2], y);
539 break;
540 case 4:
541 GBAVideoSoftwareRendererDrawBackgroundMode4(softwareRenderer, &softwareRenderer->bg[2], y);
542 break;
543 case 5:
544 GBAVideoSoftwareRendererDrawBackgroundMode5(softwareRenderer, &softwareRenderer->bg[2], y);
545 break;
546 }
547 }
548 if (TEST_LAYER_ENABLED(3)) {
549 switch (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt)) {
550 case 0:
551 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[3], y);
552 break;
553 case 2:
554 GBAVideoSoftwareRendererDrawBackgroundMode2(softwareRenderer, &softwareRenderer->bg[3], y);
555 break;
556 }
557 }
558 }
559 }
560 softwareRenderer->bg[2].sx += softwareRenderer->bg[2].dmx;
561 softwareRenderer->bg[2].sy += softwareRenderer->bg[2].dmy;
562 softwareRenderer->bg[3].sx += softwareRenderer->bg[3].dmx;
563 softwareRenderer->bg[3].sy += softwareRenderer->bg[3].dmy;
564
565 GBAVideoSoftwareRendererPostprocessBuffer(softwareRenderer);
566
567#ifdef COLOR_16_BIT
568#if defined(__ARM_NEON) && !defined(__APPLE__)
569 _to16Bit(row, softwareRenderer->row, softwareRenderer->masterEnd);
570#else
571 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
572 row[x] = softwareRenderer->row[x];
573 }
574#endif
575#else
576 memcpy(row, softwareRenderer->row, softwareRenderer->masterEnd * sizeof(*row));
577#endif
578}
579
580static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
581 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
582
583 if (softwareRenderer->temporaryBuffer) {
584 mappedMemoryFree(softwareRenderer->temporaryBuffer, softwareRenderer->masterEnd * softwareRenderer->masterHeight * 4);
585 softwareRenderer->temporaryBuffer = 0;
586 }
587 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
588 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
589 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
590 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
591}
592
593static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
594 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
595 *stride = softwareRenderer->outputBufferStride;
596 *pixels = softwareRenderer->outputBuffer;
597}
598
599static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
600 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
601
602 const color_t* colorPixels = pixels;
603 unsigned i;
604 for (i = 0; i < softwareRenderer->masterHeight; ++i) {
605 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], softwareRenderer->masterEnd * BYTES_PER_PIXEL);
606 }
607}
608
609static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
610 renderer->bg[0].enabled = GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt) && !renderer->d.disableBG[0];
611 renderer->bg[1].enabled = GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt) && !renderer->d.disableBG[1];
612 renderer->bg[2].enabled = GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt) && !renderer->d.disableBG[2];
613 renderer->bg[3].enabled = GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt) && !renderer->d.disableBG[3];
614}
615
616static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
617 UNUSED(renderer);
618 bg->priority = GBARegisterBGCNTGetPriority(value);
619 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
620 bg->charBase &= 0xC000;
621 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
622 bg->multipalette = GBARegisterBGCNTGet256Color(value);
623 bg->screenBase &= ~0xF800;
624 bg->screenBase |= GBARegisterBGCNTGetScreenBase(value) << 11;
625 bg->overflow = GBARegisterBGCNTGetOverflow(value);
626 bg->size = GBARegisterBGCNTGetSize(value);
627 bg->control = value;
628}
629
630static void GBAVideoSoftwareRendererWriteBGPA(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
631 bg->dx = value;
632}
633
634static void GBAVideoSoftwareRendererWriteBGPB(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
635 bg->dmx = value;
636}
637
638static void GBAVideoSoftwareRendererWriteBGPC(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
639 bg->dy = value;
640}
641
642static void GBAVideoSoftwareRendererWriteBGPD(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
643 bg->dmy = value;
644}
645
646static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
647 bg->refx = (bg->refx & 0xFFFF0000) | value;
648 bg->sx = bg->refx;
649}
650
651static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
652 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
653 bg->refx <<= 4;
654 bg->refx >>= 4;
655 bg->sx = bg->refx;
656}
657
658static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
659 bg->refy = (bg->refy & 0xFFFF0000) | value;
660 bg->sy = bg->refy;
661}
662
663static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
664 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
665 bg->refy <<= 4;
666 bg->refy >>= 4;
667 bg->sy = bg->refy;
668}
669
670static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
671 enum BlendEffect oldEffect = renderer->blendEffect;
672
673 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
674 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
675 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
676 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
677 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
678 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
679 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
680 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
681
682 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
683 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
684 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
685 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
686 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
687
688 if (oldEffect != renderer->blendEffect) {
689 _updatePalettes(renderer);
690 }
691}
692
693void GBAVideoSoftwareRendererPreprocessBuffer(struct GBAVideoSoftwareRenderer* softwareRenderer, int y) {
694 int x;
695 int masterEnd = softwareRenderer->masterEnd;
696 for (x = 0; x < masterEnd; x += 4) {
697 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
698 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
699 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
700 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
701 }
702
703 softwareRenderer->windows[0].endX = softwareRenderer->masterEnd;
704 softwareRenderer->nWindows = 1;
705 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
706 softwareRenderer->windows[0].control = softwareRenderer->winout;
707 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
708 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
709 }
710 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
711 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
712 }
713 } else {
714 softwareRenderer->windows[0].control.packed = 0xFF;
715 }
716
717 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
718
719 int w;
720 x = 0;
721 for (w = 0; w < softwareRenderer->nWindows; ++w) {
722 // TOOD: handle objwin on backdrop
723 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
724 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
725 backdrop |= softwareRenderer->normalPalette[0];
726 } else {
727 backdrop |= softwareRenderer->variantPalette[0];
728 }
729 int end = softwareRenderer->windows[w].endX;
730 for (; x & 3; ++x) {
731 softwareRenderer->row[x] = backdrop;
732 }
733 for (; x < end - 3; x += 4) {
734 softwareRenderer->row[x] = backdrop;
735 softwareRenderer->row[x + 1] = backdrop;
736 softwareRenderer->row[x + 2] = backdrop;
737 softwareRenderer->row[x + 3] = backdrop;
738 }
739 for (; x < end; ++x) {
740 softwareRenderer->row[x] = backdrop;
741 }
742 }
743}
744
745void GBAVideoSoftwareRendererPostprocessBuffer(struct GBAVideoSoftwareRenderer* softwareRenderer) {
746 int x, w;
747 if (softwareRenderer->target2Bd) {
748 x = 0;
749 for (w = 0; w < softwareRenderer->nWindows; ++w) {
750 uint32_t backdrop = 0;
751 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
752 backdrop |= softwareRenderer->normalPalette[0];
753 } else {
754 backdrop |= softwareRenderer->variantPalette[0];
755 }
756 int end = softwareRenderer->windows[w].endX;
757 for (; x < end; ++x) {
758 uint32_t color = softwareRenderer->row[x];
759 if (color & FLAG_TARGET_1) {
760 softwareRenderer->row[x] = _mix(softwareRenderer->bldb, backdrop, softwareRenderer->blda, color);
761 }
762 }
763 }
764 }
765 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
766 x = 0;
767 for (w = 0; w < softwareRenderer->nWindows; ++w) {
768 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
769 continue;
770 }
771 int end = softwareRenderer->windows[w].endX;
772 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
773 for (; x < end; ++x) {
774 uint32_t color = softwareRenderer->row[x];
775 if ((color & 0xFF000000) == FLAG_REBLEND) {
776 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
777 }
778 }
779 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
780 for (; x < end; ++x) {
781 uint32_t color = softwareRenderer->row[x];
782 if ((color & 0xFF000000) == FLAG_REBLEND) {
783 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
784 }
785 }
786 }
787 }
788 }
789}
790
791int GBAVideoSoftwareRendererPreprocessSpriteLayer(struct GBAVideoSoftwareRenderer* renderer, int y) {
792 int w;
793 renderer->end = 0;
794 int spriteLayers = 0;
795 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
796 if (renderer->oamDirty) {
797 _cleanOAM(renderer);
798 }
799 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
800 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
801 int mosaicY = y - (y % mosaicV);
802 for (w = 0; w < renderer->nWindows; ++w) {
803 renderer->start = renderer->end;
804 renderer->end = renderer->windows[w].endX;
805 renderer->currentWindow = renderer->windows[w].control;
806 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
807 continue;
808 }
809 int i;
810 int drawn;
811
812 for (i = 0; i < renderer->oamMax; ++i) {
813 int localY = y;
814 if (renderer->spriteCyclesRemaining <= 0) {
815 break;
816 }
817 struct GBAVideoSoftwareSprite* sprite = &renderer->sprites[i];
818 if (GBAObjAttributesAIsMosaic(sprite->obj.a)) {
819 localY = mosaicY;
820 }
821 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
822 continue;
823 }
824 drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, localY);
825 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
826 }
827 }
828 }
829 return spriteLayers;
830}
831
832static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
833 int i;
834 if (renderer->blendEffect == BLEND_BRIGHTEN) {
835 for (i = 0; i < 512; ++i) {
836 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
837 }
838 } else if (renderer->blendEffect == BLEND_DARKEN) {
839 for (i = 0; i < 512; ++i) {
840 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
841 }
842 } else {
843 for (i = 0; i < 512; ++i) {
844 renderer->variantPalette[i] = renderer->normalPalette[i];
845 }
846 }
847}