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