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 softwareRenderer->blendDirty = true;
272 value &= 0x1F1F;
273 break;
274 case REG_BLDY:
275 value &= 0x1F;
276 if (value > 0x10) {
277 value = 0x10;
278 }
279 if (softwareRenderer->bldy != value) {
280 softwareRenderer->bldy = value;
281 softwareRenderer->blendDirty = true;
282 }
283 break;
284 case REG_WIN0H:
285 softwareRenderer->winN[0].h.end = value;
286 softwareRenderer->winN[0].h.start = value >> 8;
287 if (softwareRenderer->winN[0].h.start > softwareRenderer->masterEnd && softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end) {
288 softwareRenderer->winN[0].h.start = 0;
289 }
290 if (softwareRenderer->winN[0].h.end > softwareRenderer->masterEnd) {
291 softwareRenderer->winN[0].h.end = softwareRenderer->masterEnd;
292 if (softwareRenderer->winN[0].h.start > softwareRenderer->masterEnd) {
293 softwareRenderer->winN[0].h.start = softwareRenderer->masterEnd;
294 }
295 }
296 break;
297 case REG_WIN1H:
298 softwareRenderer->winN[1].h.end = value;
299 softwareRenderer->winN[1].h.start = value >> 8;
300 if (softwareRenderer->winN[1].h.start > softwareRenderer->masterEnd && softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end) {
301 softwareRenderer->winN[1].h.start = 0;
302 }
303 if (softwareRenderer->winN[1].h.end > softwareRenderer->masterEnd) {
304 softwareRenderer->winN[1].h.end = softwareRenderer->masterEnd;
305 if (softwareRenderer->winN[1].h.start > softwareRenderer->masterEnd) {
306 softwareRenderer->winN[1].h.start = softwareRenderer->masterEnd;
307 }
308 }
309 break;
310 case REG_WIN0V:
311 softwareRenderer->winN[0].v.end = value;
312 softwareRenderer->winN[0].v.start = value >> 8;
313 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end) {
314 softwareRenderer->winN[0].v.start = 0;
315 }
316 if (softwareRenderer->winN[0].v.end > VIDEO_VERTICAL_PIXELS) {
317 softwareRenderer->winN[0].v.end = VIDEO_VERTICAL_PIXELS;
318 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS) {
319 softwareRenderer->winN[0].v.start = VIDEO_VERTICAL_PIXELS;
320 }
321 }
322 break;
323 case REG_WIN1V:
324 softwareRenderer->winN[1].v.end = value;
325 softwareRenderer->winN[1].v.start = value >> 8;
326 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end) {
327 softwareRenderer->winN[1].v.start = 0;
328 }
329 if (softwareRenderer->winN[1].v.end > VIDEO_VERTICAL_PIXELS) {
330 softwareRenderer->winN[1].v.end = VIDEO_VERTICAL_PIXELS;
331 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS) {
332 softwareRenderer->winN[1].v.start = VIDEO_VERTICAL_PIXELS;
333 }
334 }
335 break;
336 case REG_WININ:
337 value &= 0x3F3F;
338 softwareRenderer->winN[0].control.packed = value;
339 softwareRenderer->winN[1].control.packed = value >> 8;
340 break;
341 case REG_WINOUT:
342 value &= 0x3F3F;
343 softwareRenderer->winout.packed = value;
344 softwareRenderer->objwin.packed = value >> 8;
345 break;
346 case REG_MOSAIC:
347 softwareRenderer->mosaic = value;
348 break;
349 case REG_GREENSWP:
350 mLOG(GBA_VIDEO, STUB, "Stub video register write: 0x%03X", address);
351 break;
352 default:
353 mLOG(GBA_VIDEO, GAME_ERROR, "Invalid video register: 0x%03X", address);
354 }
355 return value;
356}
357
358static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
359 if (renderer->cache) {
360 mTileCacheWriteVRAM(renderer->cache, address);
361 }
362}
363
364static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
365 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
366 softwareRenderer->oamDirty = 1;
367 UNUSED(oam);
368}
369
370static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
371 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
372#ifdef COLOR_16_BIT
373#ifdef COLOR_5_6_5
374 unsigned color = 0;
375 color |= (value & 0x001F) << 11;
376 color |= (value & 0x03E0) << 1;
377 color |= (value & 0x7C00) >> 10;
378#else
379 unsigned color = value;
380#endif
381#else
382 unsigned color = 0;
383 color |= (value << 3) & 0xF8;
384 color |= (value << 6) & 0xF800;
385 color |= (value << 9) & 0xF80000;
386 color |= (color >> 5) & 0x070707;
387#endif
388 softwareRenderer->normalPalette[address >> 1] = color;
389 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
390 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
391 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
392 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
393 }
394 if (renderer->cache) {
395 mTileCacheWritePalette(renderer->cache, address);
396 }
397}
398
399static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
400 if (win->v.end >= win->v.start) {
401 if (y >= win->v.end) {
402 return;
403 }
404 if (y < win->v.start) {
405 return;
406 }
407 } else if (y >= win->v.end && y < win->v.start) {
408 return;
409 }
410 if (win->h.end > softwareRenderer->masterEnd || win->h.end < win->h.start) {
411 struct WindowN splits[2] = { *win, *win };
412 splits[0].h.start = 0;
413 splits[1].h.end = softwareRenderer->masterEnd;
414 _breakWindowInner(softwareRenderer, &splits[0]);
415 _breakWindowInner(softwareRenderer, &splits[1]);
416 } else {
417 _breakWindowInner(softwareRenderer, win);
418 }
419}
420
421static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
422 int activeWindow;
423 int startX = 0;
424 if (win->h.end > 0) {
425 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
426 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
427 // Insert a window before the end of the active window
428 struct Window oldWindow = softwareRenderer->windows[activeWindow];
429 if (win->h.start > startX) {
430 // And after the start of the active window
431 int nextWindow = softwareRenderer->nWindows;
432 ++softwareRenderer->nWindows;
433 for (; nextWindow > activeWindow; --nextWindow) {
434 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
435 }
436 softwareRenderer->windows[activeWindow].endX = win->h.start;
437 ++activeWindow;
438 }
439 softwareRenderer->windows[activeWindow].control = win->control;
440 softwareRenderer->windows[activeWindow].endX = win->h.end;
441 if (win->h.end >= oldWindow.endX) {
442 // Trim off extra windows we've overwritten
443 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
444 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
445 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write will occur");
446 return;
447 }
448 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
449 --softwareRenderer->nWindows;
450 }
451 } else {
452 ++activeWindow;
453 int nextWindow = softwareRenderer->nWindows;
454 ++softwareRenderer->nWindows;
455 for (; nextWindow > activeWindow; --nextWindow) {
456 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
457 }
458 softwareRenderer->windows[activeWindow] = oldWindow;
459 }
460 break;
461 }
462 startX = softwareRenderer->windows[activeWindow].endX;
463 }
464 }
465#ifdef DEBUG
466 if (softwareRenderer->nWindows > MAX_WINDOW) {
467 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write occurred!");
468 }
469#endif
470}
471
472static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer) {
473 int i;
474 int oamMax = 0;
475 for (i = 0; i < 128; ++i) {
476 struct GBAObj obj;
477 LOAD_16(obj.a, 0, &renderer->d.oam->obj[i].a);
478 LOAD_16(obj.b, 0, &renderer->d.oam->obj[i].b);
479 LOAD_16(obj.c, 0, &renderer->d.oam->obj[i].c);
480 if (GBAObjAttributesAIsTransformed(obj.a) || !GBAObjAttributesAIsDisable(obj.a)) {
481 int height = GBAVideoObjSizes[GBAObjAttributesAGetShape(obj.a) * 4 + GBAObjAttributesBGetSize(obj.b)][1];
482 if (GBAObjAttributesAIsTransformed(obj.a)) {
483 height <<= GBAObjAttributesAGetDoubleSize(obj.a);
484 }
485 if (GBAObjAttributesAGetY(obj.a) < renderer->masterHeight || GBAObjAttributesAGetY(obj.a) + height >= renderer->masterScanlines) {
486 renderer->sprites[oamMax].y = GBAObjAttributesAGetY(obj.a);
487 renderer->sprites[oamMax].endY = GBAObjAttributesAGetY(obj.a) + height;
488 renderer->sprites[oamMax].obj = obj;
489 ++oamMax;
490 }
491 }
492 }
493 renderer->oamMax = oamMax;
494 renderer->oamDirty = 0;
495}
496
497static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
498 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
499
500 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
501 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
502 int x;
503 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
504 row[x] = GBA_COLOR_WHITE;
505 }
506 return;
507 }
508
509 uint16_t* objVramBase = softwareRenderer->d.vramOBJ[0];
510 if (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) >= 3) {
511 softwareRenderer->d.vramOBJ[0] = NULL; // OBJ VRAM bottom is blocked in bitmap modes
512 }
513
514 GBAVideoSoftwareRendererPreprocessBuffer(softwareRenderer, y);
515 int spriteLayers = GBAVideoSoftwareRendererPreprocessSpriteLayer(softwareRenderer, y);
516 softwareRenderer->d.vramOBJ[0] = objVramBase;
517
518 int w;
519 unsigned priority;
520 for (priority = 0; priority < 4; ++priority) {
521 softwareRenderer->end = 0;
522 for (w = 0; w < softwareRenderer->nWindows; ++w) {
523 softwareRenderer->start = softwareRenderer->end;
524 softwareRenderer->end = softwareRenderer->windows[w].endX;
525 softwareRenderer->currentWindow = softwareRenderer->windows[w].control;
526 if (spriteLayers & (1 << priority)) {
527 GBAVideoSoftwareRendererPostprocessSprite(softwareRenderer, priority);
528 }
529 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
530 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[0], y);
531 }
532 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
533 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[1], y);
534 }
535 if (TEST_LAYER_ENABLED(2)) {
536 switch (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt)) {
537 case 0:
538 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[2], y);
539 break;
540 case 1:
541 case 2:
542 GBAVideoSoftwareRendererDrawBackgroundMode2(softwareRenderer, &softwareRenderer->bg[2], y);
543 break;
544 case 3:
545 GBAVideoSoftwareRendererDrawBackgroundMode3(softwareRenderer, &softwareRenderer->bg[2], y);
546 break;
547 case 4:
548 GBAVideoSoftwareRendererDrawBackgroundMode4(softwareRenderer, &softwareRenderer->bg[2], y);
549 break;
550 case 5:
551 GBAVideoSoftwareRendererDrawBackgroundMode5(softwareRenderer, &softwareRenderer->bg[2], y);
552 break;
553 }
554 }
555 if (TEST_LAYER_ENABLED(3)) {
556 switch (GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt)) {
557 case 0:
558 GBAVideoSoftwareRendererDrawBackgroundMode0(softwareRenderer, &softwareRenderer->bg[3], y);
559 break;
560 case 2:
561 GBAVideoSoftwareRendererDrawBackgroundMode2(softwareRenderer, &softwareRenderer->bg[3], y);
562 break;
563 }
564 }
565 }
566 }
567 softwareRenderer->bg[2].sx += softwareRenderer->bg[2].dmx;
568 softwareRenderer->bg[2].sy += softwareRenderer->bg[2].dmy;
569 softwareRenderer->bg[3].sx += softwareRenderer->bg[3].dmx;
570 softwareRenderer->bg[3].sy += softwareRenderer->bg[3].dmy;
571
572 GBAVideoSoftwareRendererPostprocessBuffer(softwareRenderer);
573
574#ifdef COLOR_16_BIT
575#if defined(__ARM_NEON) && !defined(__APPLE__)
576 _to16Bit(row, softwareRenderer->row, softwareRenderer->masterEnd);
577#else
578 for (x = 0; x < softwareRenderer->masterEnd; ++x) {
579 row[x] = softwareRenderer->row[x];
580 }
581#endif
582#else
583 memcpy(row, softwareRenderer->row, softwareRenderer->masterEnd * sizeof(*row));
584#endif
585}
586
587static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
588 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
589
590 if (softwareRenderer->temporaryBuffer) {
591 mappedMemoryFree(softwareRenderer->temporaryBuffer, softwareRenderer->masterEnd * softwareRenderer->masterHeight * 4);
592 softwareRenderer->temporaryBuffer = 0;
593 }
594 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
595 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
596 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
597 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
598}
599
600static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
601 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
602 *stride = softwareRenderer->outputBufferStride;
603 *pixels = softwareRenderer->outputBuffer;
604}
605
606static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
607 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
608
609 const color_t* colorPixels = pixels;
610 unsigned i;
611 for (i = 0; i < softwareRenderer->masterHeight; ++i) {
612 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], softwareRenderer->masterEnd * BYTES_PER_PIXEL);
613 }
614}
615
616static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
617 renderer->bg[0].enabled = GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt) && !renderer->d.disableBG[0];
618 renderer->bg[1].enabled = GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt) && !renderer->d.disableBG[1];
619 renderer->bg[2].enabled = GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt) && !renderer->d.disableBG[2];
620 renderer->bg[3].enabled = GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt) && !renderer->d.disableBG[3];
621}
622
623static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
624 UNUSED(renderer);
625 bg->priority = GBARegisterBGCNTGetPriority(value);
626 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
627 bg->charBase &= 0xC000;
628 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
629 bg->multipalette = GBARegisterBGCNTGet256Color(value);
630 bg->screenBase &= ~0xF800;
631 bg->screenBase |= GBARegisterBGCNTGetScreenBase(value) << 11;
632 bg->overflow = GBARegisterBGCNTGetOverflow(value);
633 bg->size = GBARegisterBGCNTGetSize(value);
634 bg->control = value;
635}
636
637static void GBAVideoSoftwareRendererWriteBGPA(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
638 bg->dx = value;
639}
640
641static void GBAVideoSoftwareRendererWriteBGPB(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
642 bg->dmx = value;
643}
644
645static void GBAVideoSoftwareRendererWriteBGPC(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
646 bg->dy = value;
647}
648
649static void GBAVideoSoftwareRendererWriteBGPD(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
650 bg->dmy = value;
651}
652
653static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
654 bg->refx = (bg->refx & 0xFFFF0000) | value;
655 bg->sx = bg->refx;
656}
657
658static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
659 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
660 bg->refx <<= 4;
661 bg->refx >>= 4;
662 bg->sx = bg->refx;
663}
664
665static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
666 bg->refy = (bg->refy & 0xFFFF0000) | value;
667 bg->sy = bg->refy;
668}
669
670static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
671 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
672 bg->refy <<= 4;
673 bg->refy >>= 4;
674 bg->sy = bg->refy;
675}
676
677static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
678 enum BlendEffect oldEffect = renderer->blendEffect;
679
680 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
681 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
682 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
683 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
684 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
685 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
686 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
687 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
688
689 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
690 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
691 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
692 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
693 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
694
695 if (oldEffect != renderer->blendEffect) {
696 renderer->blendDirty = true;
697 }
698}
699
700void GBAVideoSoftwareRendererPreprocessBuffer(struct GBAVideoSoftwareRenderer* softwareRenderer, int y) {
701 int x;
702 int masterEnd = softwareRenderer->masterEnd;
703 for (x = 0; x < masterEnd; x += 4) {
704 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
705 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
706 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
707 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
708 }
709
710 softwareRenderer->windows[0].endX = softwareRenderer->masterEnd;
711 softwareRenderer->nWindows = 1;
712 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
713 softwareRenderer->windows[0].control = softwareRenderer->winout;
714 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
715 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
716 }
717 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
718 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
719 }
720 } else {
721 softwareRenderer->windows[0].control.packed = 0xFF;
722 }
723
724 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
725
726 int w;
727 x = 0;
728 for (w = 0; w < softwareRenderer->nWindows; ++w) {
729 // TOOD: handle objwin on backdrop
730 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
731 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
732 backdrop |= softwareRenderer->normalPalette[0];
733 } else {
734 backdrop |= softwareRenderer->variantPalette[0];
735 }
736 int end = softwareRenderer->windows[w].endX;
737 for (; x & 3; ++x) {
738 softwareRenderer->row[x] = backdrop;
739 }
740 for (; x < end - 3; x += 4) {
741 softwareRenderer->row[x] = backdrop;
742 softwareRenderer->row[x + 1] = backdrop;
743 softwareRenderer->row[x + 2] = backdrop;
744 softwareRenderer->row[x + 3] = backdrop;
745 }
746 for (; x < end; ++x) {
747 softwareRenderer->row[x] = backdrop;
748 }
749 }
750
751 if (softwareRenderer->blendDirty) {
752 _updatePalettes(softwareRenderer);
753 softwareRenderer->blendDirty = false;
754 }
755}
756
757void GBAVideoSoftwareRendererPostprocessBuffer(struct GBAVideoSoftwareRenderer* softwareRenderer) {
758 int x, w;
759 if (softwareRenderer->target2Bd) {
760 x = 0;
761 for (w = 0; w < softwareRenderer->nWindows; ++w) {
762 uint32_t backdrop = 0;
763 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
764 backdrop |= softwareRenderer->normalPalette[0];
765 } else {
766 backdrop |= softwareRenderer->variantPalette[0];
767 }
768 int end = softwareRenderer->windows[w].endX;
769 for (; x < end; ++x) {
770 uint32_t color = softwareRenderer->row[x];
771 if (color & FLAG_TARGET_1) {
772 softwareRenderer->row[x] = _mix(softwareRenderer->alphaB[x], backdrop, softwareRenderer->alphaA[x], color);
773 }
774 }
775 }
776 }
777 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
778 x = 0;
779 for (w = 0; w < softwareRenderer->nWindows; ++w) {
780 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
781 continue;
782 }
783 int end = softwareRenderer->windows[w].endX;
784 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
785 for (; x < end; ++x) {
786 uint32_t color = softwareRenderer->row[x];
787 if ((color & 0xFF000000) == FLAG_REBLEND) {
788 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
789 }
790 }
791 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
792 for (; x < end; ++x) {
793 uint32_t color = softwareRenderer->row[x];
794 if ((color & 0xFF000000) == FLAG_REBLEND) {
795 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
796 }
797 }
798 }
799 }
800 }
801}
802
803int GBAVideoSoftwareRendererPreprocessSpriteLayer(struct GBAVideoSoftwareRenderer* renderer, int y) {
804 int w;
805 renderer->end = 0;
806 int spriteLayers = 0;
807 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
808 if (renderer->oamDirty) {
809 _cleanOAM(renderer);
810 }
811 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
812 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
813 int mosaicY = y - (y % mosaicV);
814 for (w = 0; w < renderer->nWindows; ++w) {
815 renderer->start = renderer->end;
816 renderer->end = renderer->windows[w].endX;
817 renderer->currentWindow = renderer->windows[w].control;
818 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
819 continue;
820 }
821 int i;
822 int drawn;
823
824 for (i = 0; i < renderer->oamMax; ++i) {
825 int localY = y;
826 if (renderer->spriteCyclesRemaining <= 0) {
827 break;
828 }
829 struct GBAVideoSoftwareSprite* sprite = &renderer->sprites[i];
830 if (GBAObjAttributesAIsMosaic(sprite->obj.a)) {
831 localY = mosaicY;
832 }
833 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
834 continue;
835 }
836 drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, localY);
837 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
838 }
839 }
840 }
841 return spriteLayers;
842}
843
844static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
845 int i;
846 memset(renderer->alphaA, renderer->blda, sizeof(renderer->alphaA));
847 memset(renderer->alphaB, renderer->bldb, sizeof(renderer->alphaB));
848 if (renderer->blendEffect == BLEND_BRIGHTEN) {
849 for (i = 0; i < 512; ++i) {
850 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
851 }
852 } else if (renderer->blendEffect == BLEND_DARKEN) {
853 for (i = 0; i < 512; ++i) {
854 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
855 }
856 } else {
857 for (i = 0; i < 512; ++i) {
858 renderer->variantPalette[i] = renderer->normalPalette[i];
859 }
860 }
861}