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 softwareRenderer->masterBright = 0;
99 softwareRenderer->masterBrightY = 0;
100 for (i = 0; i < 1024; i += 2) {
101 uint16_t entry;
102 LOAD_16(entry, i, softwareRenderer->d.palette);
103 GBAVideoSoftwareRendererWritePalette(renderer, i, entry);
104 }
105 softwareRenderer->objExtPalette = NULL;
106 softwareRenderer->objExtVariantPalette = NULL;
107 softwareRenderer->blendDirty = false;
108 _updatePalettes(softwareRenderer);
109
110 softwareRenderer->blda = 0;
111 softwareRenderer->bldb = 0;
112 softwareRenderer->bldy = 0;
113
114 softwareRenderer->winN[0] = (struct WindowN) { .control = { .priority = 0 } };
115 softwareRenderer->winN[1] = (struct WindowN) { .control = { .priority = 1 } };
116 softwareRenderer->objwin = (struct WindowControl) { .priority = 2 };
117 softwareRenderer->winout = (struct WindowControl) { .priority = 3 };
118 softwareRenderer->oamMax = 0;
119
120 softwareRenderer->mosaic = 0;
121
122 for (i = 0; i < 4; ++i) {
123 struct GBAVideoSoftwareBackground* bg = &softwareRenderer->bg[i];
124 bg->index = i;
125 bg->enabled = 0;
126 bg->priority = 0;
127 bg->charBase = 0;
128 bg->mosaic = 0;
129 bg->multipalette = 0;
130 bg->screenBase = 0;
131 bg->overflow = 0;
132 bg->size = 0;
133 bg->target1 = 0;
134 bg->target2 = 0;
135 bg->x = 0;
136 bg->y = 0;
137 bg->refx = 0;
138 bg->refy = 0;
139 bg->dx = 256;
140 bg->dmx = 0;
141 bg->dy = 0;
142 bg->dmy = 256;
143 bg->sx = 0;
144 bg->sy = 0;
145 bg->extPalette = NULL;
146 bg->variantPalette = NULL;
147 }
148}
149
150static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer) {
151 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
152 UNUSED(softwareRenderer);
153}
154
155static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
156 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
157 switch (address) {
158 case REG_DISPCNT:
159 softwareRenderer->dispcnt = value;
160 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
161 break;
162 case REG_BG0CNT:
163 value &= 0xDFFF;
164 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
165 break;
166 case REG_BG1CNT:
167 value &= 0xDFFF;
168 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
169 break;
170 case REG_BG2CNT:
171 value &= 0xFFFF;
172 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
173 break;
174 case REG_BG3CNT:
175 value &= 0xFFFF;
176 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
177 break;
178 case REG_BG0HOFS:
179 value &= 0x01FF;
180 softwareRenderer->bg[0].x = value;
181 break;
182 case REG_BG0VOFS:
183 value &= 0x01FF;
184 softwareRenderer->bg[0].y = value;
185 break;
186 case REG_BG1HOFS:
187 value &= 0x01FF;
188 softwareRenderer->bg[1].x = value;
189 break;
190 case REG_BG1VOFS:
191 value &= 0x01FF;
192 softwareRenderer->bg[1].y = value;
193 break;
194 case REG_BG2HOFS:
195 value &= 0x01FF;
196 softwareRenderer->bg[2].x = value;
197 break;
198 case REG_BG2VOFS:
199 value &= 0x01FF;
200 softwareRenderer->bg[2].y = value;
201 break;
202 case REG_BG3HOFS:
203 value &= 0x01FF;
204 softwareRenderer->bg[3].x = value;
205 break;
206 case REG_BG3VOFS:
207 value &= 0x01FF;
208 softwareRenderer->bg[3].y = value;
209 break;
210 case REG_BG2PA:
211 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[2], value);
212 break;
213 case REG_BG2PB:
214 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[2], value);
215 break;
216 case REG_BG2PC:
217 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[2], value);
218 break;
219 case REG_BG2PD:
220 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[2], value);
221 break;
222 case REG_BG2X_LO:
223 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[2], value);
224 break;
225 case REG_BG2X_HI:
226 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[2], value);
227 break;
228 case REG_BG2Y_LO:
229 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[2], value);
230 break;
231 case REG_BG2Y_HI:
232 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[2], value);
233 break;
234 case REG_BG3PA:
235 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[3], value);
236 break;
237 case REG_BG3PB:
238 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[3], value);
239 break;
240 case REG_BG3PC:
241 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[3], value);
242 break;
243 case REG_BG3PD:
244 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[3], value);
245 break;
246 case REG_BG3X_LO:
247 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[3], value);
248 break;
249 case REG_BG3X_HI:
250 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[3], value);
251 break;
252 case REG_BG3Y_LO:
253 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[3], value);
254 break;
255 case REG_BG3Y_HI:
256 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[3], value);
257 break;
258 case REG_BLDCNT:
259 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
260 value &= 0x3FFF;
261 break;
262 case REG_BLDALPHA:
263 softwareRenderer->blda = value & 0x1F;
264 if (softwareRenderer->blda > 0x10) {
265 softwareRenderer->blda = 0x10;
266 }
267 softwareRenderer->bldb = (value >> 8) & 0x1F;
268 if (softwareRenderer->bldb > 0x10) {
269 softwareRenderer->bldb = 0x10;
270 }
271 value &= 0x1F1F;
272 break;
273 case REG_BLDY:
274 value &= 0x1F;
275 if (value > 0x10) {
276 value = 0x10;
277 }
278 if (softwareRenderer->bldy != value) {
279 softwareRenderer->bldy = value;
280 softwareRenderer->blendDirty = true;
281 }
282 break;
283 case REG_WIN0H:
284 softwareRenderer->winN[0].h.end = value;
285 softwareRenderer->winN[0].h.start = value >> 8;
286 if (softwareRenderer->winN[0].h.start > softwareRenderer->masterEnd && softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end) {
287 softwareRenderer->winN[0].h.start = 0;
288 }
289 if (softwareRenderer->winN[0].h.end > softwareRenderer->masterEnd) {
290 softwareRenderer->winN[0].h.end = softwareRenderer->masterEnd;
291 if (softwareRenderer->winN[0].h.start > softwareRenderer->masterEnd) {
292 softwareRenderer->winN[0].h.start = softwareRenderer->masterEnd;
293 }
294 }
295 break;
296 case REG_WIN1H:
297 softwareRenderer->winN[1].h.end = value;
298 softwareRenderer->winN[1].h.start = value >> 8;
299 if (softwareRenderer->winN[1].h.start > softwareRenderer->masterEnd && softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end) {
300 softwareRenderer->winN[1].h.start = 0;
301 }
302 if (softwareRenderer->winN[1].h.end > softwareRenderer->masterEnd) {
303 softwareRenderer->winN[1].h.end = softwareRenderer->masterEnd;
304 if (softwareRenderer->winN[1].h.start > softwareRenderer->masterEnd) {
305 softwareRenderer->winN[1].h.start = softwareRenderer->masterEnd;
306 }
307 }
308 break;
309 case REG_WIN0V:
310 softwareRenderer->winN[0].v.end = value;
311 softwareRenderer->winN[0].v.start = value >> 8;
312 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end) {
313 softwareRenderer->winN[0].v.start = 0;
314 }
315 if (softwareRenderer->winN[0].v.end > VIDEO_VERTICAL_PIXELS) {
316 softwareRenderer->winN[0].v.end = VIDEO_VERTICAL_PIXELS;
317 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS) {
318 softwareRenderer->winN[0].v.start = VIDEO_VERTICAL_PIXELS;
319 }
320 }
321 break;
322 case REG_WIN1V:
323 softwareRenderer->winN[1].v.end = value;
324 softwareRenderer->winN[1].v.start = value >> 8;
325 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end) {
326 softwareRenderer->winN[1].v.start = 0;
327 }
328 if (softwareRenderer->winN[1].v.end > VIDEO_VERTICAL_PIXELS) {
329 softwareRenderer->winN[1].v.end = VIDEO_VERTICAL_PIXELS;
330 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS) {
331 softwareRenderer->winN[1].v.start = VIDEO_VERTICAL_PIXELS;
332 }
333 }
334 break;
335 case REG_WININ:
336 value &= 0x3F3F;
337 softwareRenderer->winN[0].control.packed = value;
338 softwareRenderer->winN[1].control.packed = value >> 8;
339 break;
340 case REG_WINOUT:
341 value &= 0x3F3F;
342 softwareRenderer->winout.packed = value;
343 softwareRenderer->objwin.packed = value >> 8;
344 break;
345 case REG_MOSAIC:
346 softwareRenderer->mosaic = value;
347 break;
348 case REG_GREENSWP:
349 mLOG(GBA_VIDEO, STUB, "Stub video register write: 0x%03X", address);
350 break;
351 default:
352 mLOG(GBA_VIDEO, GAME_ERROR, "Invalid video register: 0x%03X", address);
353 }
354 return value;
355}
356
357static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
358 if (renderer->cache) {
359 mTileCacheWriteVRAM(renderer->cache, address);
360 }
361}
362
363static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
364 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
365 softwareRenderer->oamDirty = 1;
366 UNUSED(oam);
367}
368
369static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
370 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
371#ifdef COLOR_16_BIT
372#ifdef COLOR_5_6_5
373 unsigned color = 0;
374 color |= (value & 0x001F) << 11;
375 color |= (value & 0x03E0) << 1;
376 color |= (value & 0x7C00) >> 10;
377#else
378 unsigned color = value;
379#endif
380#else
381 unsigned color = 0;
382 color |= (value << 3) & 0xF8;
383 color |= (value << 6) & 0xF800;
384 color |= (value << 9) & 0xF80000;
385 color |= (color >> 5) & 0x070707;
386#endif
387 softwareRenderer->normalPalette[address >> 1] = color;
388 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
389 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
390 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
391 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
392 }
393 if (renderer->cache) {
394 mTileCacheWritePalette(renderer->cache, address);
395 }
396}
397
398static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
399 if (win->v.end >= win->v.start) {
400 if (y >= win->v.end) {
401 return;
402 }
403 if (y < win->v.start) {
404 return;
405 }
406 } else if (y >= win->v.end && y < win->v.start) {
407 return;
408 }
409 if (win->h.end > softwareRenderer->masterEnd || win->h.end < win->h.start) {
410 struct WindowN splits[2] = { *win, *win };
411 splits[0].h.start = 0;
412 splits[1].h.end = softwareRenderer->masterEnd;
413 _breakWindowInner(softwareRenderer, &splits[0]);
414 _breakWindowInner(softwareRenderer, &splits[1]);
415 } else {
416 _breakWindowInner(softwareRenderer, win);
417 }
418}
419
420static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
421 int activeWindow;
422 int startX = 0;
423 if (win->h.end > 0) {
424 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
425 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
426 // Insert a window before the end of the active window
427 struct Window oldWindow = softwareRenderer->windows[activeWindow];
428 if (win->h.start > startX) {
429 // And after the start of the active window
430 int nextWindow = softwareRenderer->nWindows;
431 ++softwareRenderer->nWindows;
432 for (; nextWindow > activeWindow; --nextWindow) {
433 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
434 }
435 softwareRenderer->windows[activeWindow].endX = win->h.start;
436 ++activeWindow;
437 }
438 softwareRenderer->windows[activeWindow].control = win->control;
439 softwareRenderer->windows[activeWindow].endX = win->h.end;
440 if (win->h.end >= oldWindow.endX) {
441 // Trim off extra windows we've overwritten
442 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
443 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
444 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write will occur");
445 return;
446 }
447 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
448 --softwareRenderer->nWindows;
449 }
450 } else {
451 ++activeWindow;
452 int nextWindow = softwareRenderer->nWindows;
453 ++softwareRenderer->nWindows;
454 for (; nextWindow > activeWindow; --nextWindow) {
455 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
456 }
457 softwareRenderer->windows[activeWindow] = oldWindow;
458 }
459 break;
460 }
461 startX = softwareRenderer->windows[activeWindow].endX;
462 }
463 }
464#ifdef DEBUG
465 if (softwareRenderer->nWindows > MAX_WINDOW) {
466 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write occurred!");
467 }
468#endif
469}
470
471static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer) {
472 int i;
473 int oamMax = 0;
474 for (i = 0; i < 128; ++i) {
475 struct GBAObj obj;
476 LOAD_16(obj.a, 0, &renderer->d.oam->obj[i].a);
477 LOAD_16(obj.b, 0, &renderer->d.oam->obj[i].b);
478 LOAD_16(obj.c, 0, &renderer->d.oam->obj[i].c);
479 if (GBAObjAttributesAIsTransformed(obj.a) || !GBAObjAttributesAIsDisable(obj.a)) {
480 int height = GBAVideoObjSizes[GBAObjAttributesAGetShape(obj.a) * 4 + GBAObjAttributesBGetSize(obj.b)][1];
481 if (GBAObjAttributesAIsTransformed(obj.a)) {
482 height <<= GBAObjAttributesAGetDoubleSize(obj.a);
483 }
484 if (GBAObjAttributesAGetY(obj.a) < renderer->masterHeight || GBAObjAttributesAGetY(obj.a) + height >= renderer->masterScanlines) {
485 renderer->sprites[oamMax].y = GBAObjAttributesAGetY(obj.a);
486 renderer->sprites[oamMax].endY = GBAObjAttributesAGetY(obj.a) + height;
487 renderer->sprites[oamMax].obj = obj;
488 ++oamMax;
489 }
490 }
491 }
492 renderer->oamMax = oamMax;
493 renderer->oamDirty = 0;
494}
495
496static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
497 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
498
499 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
500 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
501 int x;
502 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
503 row[x] = GBA_COLOR_WHITE;
504 }
505 return;
506 }
507
508 uint16_t* objVramBase = softwareRenderer->d.vramOBJ[0];
509 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) >= 3) {
510 softwareRenderer->d.vramOBJ[0] = NULL; // OBJ VRAM bottom is blocked in bitmap modes
511 }
512
513 GBAVideoSoftwareRendererPreprocessBuffer(softwareRenderer, y);
514 int spriteLayers = GBAVideoSoftwareRendererPreprocessSpriteLayer(softwareRenderer, y);
515 softwareRenderer->d.vramOBJ[0] = objVramBase;
516 if (softwareRenderer->blendDirty) {
517 _updatePalettes(softwareRenderer);
518 softwareRenderer->blendDirty = false;
519 }
520
521 int w;
522 unsigned priority;
523 for (priority = 0; priority < 4; ++priority) {
524 softwareRenderer->end = 0;
525 for (w = 0; w < softwareRenderer->nWindows; ++w) {
526 softwareRenderer->start = softwareRenderer->end;
527 softwareRenderer->end = softwareRenderer->windows[w].endX;
528 softwareRenderer->currentWindow = softwareRenderer->windows[w].control;
529 if (spriteLayers & (1 << priority)) {
530 GBAVideoSoftwareRendererPostprocessSprite(softwareRenderer, priority);
531 }
532 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
533 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[0], y);
534 }
535 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
536 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[1], y);
537 }
538 if (TEST_LAYER_ENABLED(2)) {
539 switch (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt)) {
540 case 0:
541 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[2], y);
542 break;
543 case 1:
544 case 2:
545 GBAVideoSoftwareRendererDrawBackgroundMode2(softwareRenderer, &softwareRenderer->bg[2], y);
546 break;
547 case 3:
548 GBAVideoSoftwareRendererDrawBackgroundMode3(softwareRenderer, &softwareRenderer->bg[2], y);
549 break;
550 case 4:
551 GBAVideoSoftwareRendererDrawBackgroundMode4(softwareRenderer, &softwareRenderer->bg[2], y);
552 break;
553 case 5:
554 GBAVideoSoftwareRendererDrawBackgroundMode5(softwareRenderer, &softwareRenderer->bg[2], y);
555 break;
556 }
557 }
558 if (TEST_LAYER_ENABLED(3)) {
559 switch (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt)) {
560 case 0:
561 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[3], y);
562 break;
563 case 2:
564 GBAVideoSoftwareRendererDrawBackgroundMode2(softwareRenderer, &softwareRenderer->bg[3], y);
565 break;
566 }
567 }
568 }
569 }
570 softwareRenderer->bg[2].sx += softwareRenderer->bg[2].dmx;
571 softwareRenderer->bg[2].sy += softwareRenderer->bg[2].dmy;
572 softwareRenderer->bg[3].sx += softwareRenderer->bg[3].dmx;
573 softwareRenderer->bg[3].sy += softwareRenderer->bg[3].dmy;
574
575 GBAVideoSoftwareRendererPostprocessBuffer(softwareRenderer);
576
577#ifdef COLOR_16_BIT
578#if defined(__ARM_NEON) && !defined(__APPLE__)
579 _to16Bit(row, softwareRenderer->row, softwareRenderer->masterEnd);
580#else
581 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
582 row[x] = softwareRenderer->row[x];
583 }
584#endif
585#else
586 memcpy(row, softwareRenderer->row, softwareRenderer->masterEnd * sizeof(*row));
587#endif
588}
589
590static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
591 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
592
593 if (softwareRenderer->temporaryBuffer) {
594 mappedMemoryFree(softwareRenderer->temporaryBuffer, softwareRenderer->masterEnd * softwareRenderer->masterHeight * 4);
595 softwareRenderer->temporaryBuffer = 0;
596 }
597 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
598 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
599 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
600 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
601}
602
603static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
604 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
605 *stride = softwareRenderer->outputBufferStride;
606 *pixels = softwareRenderer->outputBuffer;
607}
608
609static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
610 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
611
612 const color_t* colorPixels = pixels;
613 unsigned i;
614 for (i = 0; i < softwareRenderer->masterHeight; ++i) {
615 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], softwareRenderer->masterEnd * BYTES_PER_PIXEL);
616 }
617}
618
619static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
620 renderer->bg[0].enabled = GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt) && !renderer->d.disableBG[0];
621 renderer->bg[1].enabled = GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt) && !renderer->d.disableBG[1];
622 renderer->bg[2].enabled = GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt) && !renderer->d.disableBG[2];
623 renderer->bg[3].enabled = GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt) && !renderer->d.disableBG[3];
624}
625
626static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
627 UNUSED(renderer);
628 bg->priority = GBARegisterBGCNTGetPriority(value);
629 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
630 bg->charBase &= 0xC000;
631 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
632 bg->multipalette = GBARegisterBGCNTGet256Color(value);
633 bg->screenBase &= ~0xF800;
634 bg->screenBase |= GBARegisterBGCNTGetScreenBase(value) << 11;
635 bg->overflow = GBARegisterBGCNTGetOverflow(value);
636 bg->size = GBARegisterBGCNTGetSize(value);
637 bg->control = value;
638}
639
640static void GBAVideoSoftwareRendererWriteBGPA(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
641 bg->dx = value;
642}
643
644static void GBAVideoSoftwareRendererWriteBGPB(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
645 bg->dmx = value;
646}
647
648static void GBAVideoSoftwareRendererWriteBGPC(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
649 bg->dy = value;
650}
651
652static void GBAVideoSoftwareRendererWriteBGPD(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
653 bg->dmy = value;
654}
655
656static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
657 bg->refx = (bg->refx & 0xFFFF0000) | value;
658 bg->sx = bg->refx;
659}
660
661static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
662 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
663 bg->refx <<= 4;
664 bg->refx >>= 4;
665 bg->sx = bg->refx;
666}
667
668static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
669 bg->refy = (bg->refy & 0xFFFF0000) | value;
670 bg->sy = bg->refy;
671}
672
673static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
674 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
675 bg->refy <<= 4;
676 bg->refy >>= 4;
677 bg->sy = bg->refy;
678}
679
680static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
681 enum BlendEffect oldEffect = renderer->blendEffect;
682
683 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
684 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
685 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
686 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
687 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
688 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
689 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
690 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
691
692 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
693 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
694 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
695 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
696 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
697
698 if (oldEffect != renderer->blendEffect) {
699 renderer->blendDirty = true;
700 }
701}
702
703void GBAVideoSoftwareRendererPreprocessBuffer(struct GBAVideoSoftwareRenderer* softwareRenderer, int y) {
704 int x;
705 int masterEnd = softwareRenderer->masterEnd;
706 for (x = 0; x < masterEnd; x += 4) {
707 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
708 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
709 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
710 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
711 }
712
713 softwareRenderer->windows[0].endX = softwareRenderer->masterEnd;
714 softwareRenderer->nWindows = 1;
715 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
716 softwareRenderer->windows[0].control = softwareRenderer->winout;
717 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
718 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
719 }
720 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
721 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
722 }
723 } else {
724 softwareRenderer->windows[0].control.packed = 0xFF;
725 }
726
727 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
728
729 int w;
730 x = 0;
731 for (w = 0; w < softwareRenderer->nWindows; ++w) {
732 // TOOD: handle objwin on backdrop
733 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
734 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
735 backdrop |= softwareRenderer->normalPalette[0];
736 } else {
737 backdrop |= softwareRenderer->variantPalette[0];
738 }
739 int end = softwareRenderer->windows[w].endX;
740 for (; x & 3; ++x) {
741 softwareRenderer->row[x] = backdrop;
742 }
743 for (; x < end - 3; x += 4) {
744 softwareRenderer->row[x] = backdrop;
745 softwareRenderer->row[x + 1] = backdrop;
746 softwareRenderer->row[x + 2] = backdrop;
747 softwareRenderer->row[x + 3] = backdrop;
748 }
749 for (; x < end; ++x) {
750 softwareRenderer->row[x] = backdrop;
751 }
752 }
753}
754
755void GBAVideoSoftwareRendererPostprocessBuffer(struct GBAVideoSoftwareRenderer* softwareRenderer) {
756 int x, w;
757 if (softwareRenderer->target2Bd) {
758 x = 0;
759 for (w = 0; w < softwareRenderer->nWindows; ++w) {
760 uint32_t backdrop = 0;
761 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
762 backdrop |= softwareRenderer->normalPalette[0];
763 } else {
764 backdrop |= softwareRenderer->variantPalette[0];
765 }
766 int end = softwareRenderer->windows[w].endX;
767 for (; x < end; ++x) {
768 uint32_t color = softwareRenderer->row[x];
769 if (color & FLAG_TARGET_1) {
770 softwareRenderer->row[x] = _mix(softwareRenderer->bldb, backdrop, softwareRenderer->blda, color);
771 }
772 }
773 }
774 }
775 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
776 x = 0;
777 for (w = 0; w < softwareRenderer->nWindows; ++w) {
778 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
779 continue;
780 }
781 int end = softwareRenderer->windows[w].endX;
782 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
783 for (; x < end; ++x) {
784 uint32_t color = softwareRenderer->row[x];
785 if ((color & 0xFF000000) == FLAG_REBLEND) {
786 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
787 }
788 }
789 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
790 for (; x < end; ++x) {
791 uint32_t color = softwareRenderer->row[x];
792 if ((color & 0xFF000000) == FLAG_REBLEND) {
793 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
794 }
795 }
796 }
797 }
798 }
799}
800
801int GBAVideoSoftwareRendererPreprocessSpriteLayer(struct GBAVideoSoftwareRenderer* renderer, int y) {
802 int w;
803 renderer->end = 0;
804 int spriteLayers = 0;
805 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
806 if (renderer->oamDirty) {
807 _cleanOAM(renderer);
808 }
809 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
810 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
811 int mosaicY = y - (y % mosaicV);
812 for (w = 0; w < renderer->nWindows; ++w) {
813 renderer->start = renderer->end;
814 renderer->end = renderer->windows[w].endX;
815 renderer->currentWindow = renderer->windows[w].control;
816 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
817 continue;
818 }
819 int i;
820 int drawn;
821
822 for (i = 0; i < renderer->oamMax; ++i) {
823 int localY = y;
824 if (renderer->spriteCyclesRemaining <= 0) {
825 break;
826 }
827 struct GBAVideoSoftwareSprite* sprite = &renderer->sprites[i];
828 if (GBAObjAttributesAIsMosaic(sprite->obj.a)) {
829 localY = mosaicY;
830 }
831 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
832 continue;
833 }
834 drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, localY);
835 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
836 }
837 }
838 }
839 return spriteLayers;
840}
841
842static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
843 int i;
844 if (renderer->blendEffect == BLEND_BRIGHTEN) {
845 for (i = 0; i < 512; ++i) {
846 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
847 }
848 } else if (renderer->blendEffect == BLEND_DARKEN) {
849 for (i = 0; i < 512; ++i) {
850 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
851 }
852 } else {
853 for (i = 0; i < 512; ++i) {
854 renderer->variantPalette[i] = renderer->normalPalette[i];
855 }
856 }
857}