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
517 int w;
518 unsigned priority;
519 for (priority = 0; priority < 4; ++priority) {
520 softwareRenderer->end = 0;
521 for (w = 0; w < softwareRenderer->nWindows; ++w) {
522 softwareRenderer->start = softwareRenderer->end;
523 softwareRenderer->end = softwareRenderer->windows[w].endX;
524 softwareRenderer->currentWindow = softwareRenderer->windows[w].control;
525 if (spriteLayers & (1 << priority)) {
526 GBAVideoSoftwareRendererPostprocessSprite(softwareRenderer, priority);
527 }
528 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
529 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[0], y);
530 }
531 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
532 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[1], y);
533 }
534 if (TEST_LAYER_ENABLED(2)) {
535 switch (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt)) {
536 case 0:
537 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[2], y);
538 break;
539 case 1:
540 case 2:
541 GBAVideoSoftwareRendererDrawBackgroundMode2(softwareRenderer, &softwareRenderer->bg[2], y);
542 break;
543 case 3:
544 GBAVideoSoftwareRendererDrawBackgroundMode3(softwareRenderer, &softwareRenderer->bg[2], y);
545 break;
546 case 4:
547 GBAVideoSoftwareRendererDrawBackgroundMode4(softwareRenderer, &softwareRenderer->bg[2], y);
548 break;
549 case 5:
550 GBAVideoSoftwareRendererDrawBackgroundMode5(softwareRenderer, &softwareRenderer->bg[2], y);
551 break;
552 }
553 }
554 if (TEST_LAYER_ENABLED(3)) {
555 switch (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt)) {
556 case 0:
557 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[3], y);
558 break;
559 case 2:
560 GBAVideoSoftwareRendererDrawBackgroundMode2(softwareRenderer, &softwareRenderer->bg[3], y);
561 break;
562 }
563 }
564 }
565 }
566 softwareRenderer->bg[2].sx += softwareRenderer->bg[2].dmx;
567 softwareRenderer->bg[2].sy += softwareRenderer->bg[2].dmy;
568 softwareRenderer->bg[3].sx += softwareRenderer->bg[3].dmx;
569 softwareRenderer->bg[3].sy += softwareRenderer->bg[3].dmy;
570
571 GBAVideoSoftwareRendererPostprocessBuffer(softwareRenderer);
572
573#ifdef COLOR_16_BIT
574#if defined(__ARM_NEON) && !defined(__APPLE__)
575 _to16Bit(row, softwareRenderer->row, softwareRenderer->masterEnd);
576#else
577 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
578 row[x] = softwareRenderer->row[x];
579 }
580#endif
581#else
582 memcpy(row, softwareRenderer->row, softwareRenderer->masterEnd * sizeof(*row));
583#endif
584}
585
586static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
587 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
588
589 if (softwareRenderer->temporaryBuffer) {
590 mappedMemoryFree(softwareRenderer->temporaryBuffer, softwareRenderer->masterEnd * softwareRenderer->masterHeight * 4);
591 softwareRenderer->temporaryBuffer = 0;
592 }
593 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
594 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
595 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
596 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
597}
598
599static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
600 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
601 *stride = softwareRenderer->outputBufferStride;
602 *pixels = softwareRenderer->outputBuffer;
603}
604
605static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
606 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
607
608 const color_t* colorPixels = pixels;
609 unsigned i;
610 for (i = 0; i < softwareRenderer->masterHeight; ++i) {
611 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], softwareRenderer->masterEnd * BYTES_PER_PIXEL);
612 }
613}
614
615static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
616 renderer->bg[0].enabled = GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt) && !renderer->d.disableBG[0];
617 renderer->bg[1].enabled = GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt) && !renderer->d.disableBG[1];
618 renderer->bg[2].enabled = GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt) && !renderer->d.disableBG[2];
619 renderer->bg[3].enabled = GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt) && !renderer->d.disableBG[3];
620}
621
622static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
623 UNUSED(renderer);
624 bg->priority = GBARegisterBGCNTGetPriority(value);
625 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
626 bg->charBase &= 0xC000;
627 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
628 bg->multipalette = GBARegisterBGCNTGet256Color(value);
629 bg->screenBase &= ~0xF800;
630 bg->screenBase |= GBARegisterBGCNTGetScreenBase(value) << 11;
631 bg->overflow = GBARegisterBGCNTGetOverflow(value);
632 bg->size = GBARegisterBGCNTGetSize(value);
633 bg->control = value;
634}
635
636static void GBAVideoSoftwareRendererWriteBGPA(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
637 bg->dx = value;
638}
639
640static void GBAVideoSoftwareRendererWriteBGPB(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
641 bg->dmx = value;
642}
643
644static void GBAVideoSoftwareRendererWriteBGPC(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
645 bg->dy = value;
646}
647
648static void GBAVideoSoftwareRendererWriteBGPD(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
649 bg->dmy = value;
650}
651
652static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
653 bg->refx = (bg->refx & 0xFFFF0000) | value;
654 bg->sx = bg->refx;
655}
656
657static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
658 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
659 bg->refx <<= 4;
660 bg->refx >>= 4;
661 bg->sx = bg->refx;
662}
663
664static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
665 bg->refy = (bg->refy & 0xFFFF0000) | value;
666 bg->sy = bg->refy;
667}
668
669static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
670 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
671 bg->refy <<= 4;
672 bg->refy >>= 4;
673 bg->sy = bg->refy;
674}
675
676static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
677 enum BlendEffect oldEffect = renderer->blendEffect;
678
679 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
680 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
681 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
682 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
683 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
684 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
685 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
686 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
687
688 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
689 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
690 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
691 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
692 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
693
694 if (oldEffect != renderer->blendEffect) {
695 renderer->blendDirty = true;
696 }
697}
698
699void GBAVideoSoftwareRendererPreprocessBuffer(struct GBAVideoSoftwareRenderer* softwareRenderer, int y) {
700 int x;
701 int masterEnd = softwareRenderer->masterEnd;
702 for (x = 0; x < masterEnd; x += 4) {
703 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
704 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
705 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
706 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
707 }
708
709 softwareRenderer->windows[0].endX = softwareRenderer->masterEnd;
710 softwareRenderer->nWindows = 1;
711 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
712 softwareRenderer->windows[0].control = softwareRenderer->winout;
713 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
714 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
715 }
716 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
717 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
718 }
719 } else {
720 softwareRenderer->windows[0].control.packed = 0xFF;
721 }
722
723 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
724
725 int w;
726 x = 0;
727 for (w = 0; w < softwareRenderer->nWindows; ++w) {
728 // TOOD: handle objwin on backdrop
729 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
730 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
731 backdrop |= softwareRenderer->normalPalette[0];
732 } else {
733 backdrop |= softwareRenderer->variantPalette[0];
734 }
735 int end = softwareRenderer->windows[w].endX;
736 for (; x & 3; ++x) {
737 softwareRenderer->row[x] = backdrop;
738 }
739 for (; x < end - 3; x += 4) {
740 softwareRenderer->row[x] = backdrop;
741 softwareRenderer->row[x + 1] = backdrop;
742 softwareRenderer->row[x + 2] = backdrop;
743 softwareRenderer->row[x + 3] = backdrop;
744 }
745 for (; x < end; ++x) {
746 softwareRenderer->row[x] = backdrop;
747 }
748 }
749
750 if (softwareRenderer->blendDirty) {
751 _updatePalettes(softwareRenderer);
752 softwareRenderer->blendDirty = false;
753 }
754}
755
756void GBAVideoSoftwareRendererPostprocessBuffer(struct GBAVideoSoftwareRenderer* softwareRenderer) {
757 int x, w;
758 if (softwareRenderer->target2Bd) {
759 x = 0;
760 for (w = 0; w < softwareRenderer->nWindows; ++w) {
761 uint32_t backdrop = 0;
762 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
763 backdrop |= softwareRenderer->normalPalette[0];
764 } else {
765 backdrop |= softwareRenderer->variantPalette[0];
766 }
767 int end = softwareRenderer->windows[w].endX;
768 for (; x < end; ++x) {
769 uint32_t color = softwareRenderer->row[x];
770 if (color & FLAG_TARGET_1) {
771 softwareRenderer->row[x] = _mix(softwareRenderer->bldb, backdrop, softwareRenderer->blda, color);
772 }
773 }
774 }
775 }
776 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
777 x = 0;
778 for (w = 0; w < softwareRenderer->nWindows; ++w) {
779 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
780 continue;
781 }
782 int end = softwareRenderer->windows[w].endX;
783 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
784 for (; x < end; ++x) {
785 uint32_t color = softwareRenderer->row[x];
786 if ((color & 0xFF000000) == FLAG_REBLEND) {
787 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
788 }
789 }
790 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
791 for (; x < end; ++x) {
792 uint32_t color = softwareRenderer->row[x];
793 if ((color & 0xFF000000) == FLAG_REBLEND) {
794 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
795 }
796 }
797 }
798 }
799 }
800}
801
802int GBAVideoSoftwareRendererPreprocessSpriteLayer(struct GBAVideoSoftwareRenderer* renderer, int y) {
803 int w;
804 renderer->end = 0;
805 int spriteLayers = 0;
806 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
807 if (renderer->oamDirty) {
808 _cleanOAM(renderer);
809 }
810 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
811 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
812 int mosaicY = y - (y % mosaicV);
813 for (w = 0; w < renderer->nWindows; ++w) {
814 renderer->start = renderer->end;
815 renderer->end = renderer->windows[w].endX;
816 renderer->currentWindow = renderer->windows[w].control;
817 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
818 continue;
819 }
820 int i;
821 int drawn;
822
823 for (i = 0; i < renderer->oamMax; ++i) {
824 int localY = y;
825 if (renderer->spriteCyclesRemaining <= 0) {
826 break;
827 }
828 struct GBAVideoSoftwareSprite* sprite = &renderer->sprites[i];
829 if (GBAObjAttributesAIsMosaic(sprite->obj.a)) {
830 localY = mosaicY;
831 }
832 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
833 continue;
834 }
835 drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, localY);
836 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
837 }
838 }
839 }
840 return spriteLayers;
841}
842
843static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
844 int i;
845 if (renderer->blendEffect == BLEND_BRIGHTEN) {
846 for (i = 0; i < 512; ++i) {
847 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
848 }
849 } else if (renderer->blendEffect == BLEND_DARKEN) {
850 for (i = 0; i < 512; ++i) {
851 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
852 }
853 } else {
854 for (i = 0; i < 512; ++i) {
855 renderer->variantPalette[i] = renderer->normalPalette[i];
856 }
857 }
858}