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 GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value);
30static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value);
31static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value);
32static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value);
33static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value);
34
35static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer);
36static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y);
37
38static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer);
39
40static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y);
41static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win);
42
43void GBAVideoSoftwareRendererCreate(struct GBAVideoSoftwareRenderer* renderer) {
44 renderer->d.init = GBAVideoSoftwareRendererInit;
45 renderer->d.reset = GBAVideoSoftwareRendererReset;
46 renderer->d.deinit = GBAVideoSoftwareRendererDeinit;
47 renderer->d.writeVideoRegister = GBAVideoSoftwareRendererWriteVideoRegister;
48 renderer->d.writeVRAM = GBAVideoSoftwareRendererWriteVRAM;
49 renderer->d.writeOAM = GBAVideoSoftwareRendererWriteOAM;
50 renderer->d.writePalette = GBAVideoSoftwareRendererWritePalette;
51 renderer->d.drawScanline = GBAVideoSoftwareRendererDrawScanline;
52 renderer->d.finishFrame = GBAVideoSoftwareRendererFinishFrame;
53 renderer->d.getPixels = GBAVideoSoftwareRendererGetPixels;
54 renderer->d.putPixels = GBAVideoSoftwareRendererPutPixels;
55
56 renderer->d.disableBG[0] = false;
57 renderer->d.disableBG[1] = false;
58 renderer->d.disableBG[2] = false;
59 renderer->d.disableBG[3] = false;
60 renderer->d.disableOBJ = false;
61
62 renderer->temporaryBuffer = 0;
63}
64
65static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer) {
66 GBAVideoSoftwareRendererReset(renderer);
67
68 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
69
70 int y;
71 for (y = 0; y < VIDEO_VERTICAL_PIXELS; ++y) {
72 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
73 int x;
74 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
75 row[x] = GBA_COLOR_WHITE;
76 }
77 }
78}
79
80static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer) {
81 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
82 int i;
83
84 softwareRenderer->dispcnt = 0x0080;
85
86 softwareRenderer->target1Obj = 0;
87 softwareRenderer->target1Bd = 0;
88 softwareRenderer->target2Obj = 0;
89 softwareRenderer->target2Bd = 0;
90 softwareRenderer->blendEffect = BLEND_NONE;
91 for (i = 0; i < 1024; i += 2) {
92 uint16_t entry;
93 LOAD_16(entry, i, softwareRenderer->d.palette);
94 GBAVideoSoftwareRendererWritePalette(renderer, i, entry);
95 }
96 softwareRenderer->blendDirty = false;
97 _updatePalettes(softwareRenderer);
98
99 softwareRenderer->blda = 0;
100 softwareRenderer->bldb = 0;
101 softwareRenderer->bldy = 0;
102
103 softwareRenderer->winN[0] = (struct WindowN) { .control = { .priority = 0 } };
104 softwareRenderer->winN[1] = (struct WindowN) { .control = { .priority = 1 } };
105 softwareRenderer->objwin = (struct WindowControl) { .priority = 2 };
106 softwareRenderer->winout = (struct WindowControl) { .priority = 3 };
107 softwareRenderer->oamMax = 0;
108
109 softwareRenderer->mosaic = 0;
110
111 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
112 memset(softwareRenderer->ioCache, 0, sizeof(softwareRenderer->ioCache));
113
114 for (i = 0; i < 4; ++i) {
115 struct GBAVideoSoftwareBackground* bg = &softwareRenderer->bg[i];
116 bg->index = i;
117 bg->enabled = 0;
118 bg->priority = 0;
119 bg->charBase = 0;
120 bg->mosaic = 0;
121 bg->multipalette = 0;
122 bg->screenBase = 0;
123 bg->overflow = 0;
124 bg->size = 0;
125 bg->target1 = 0;
126 bg->target2 = 0;
127 bg->x = 0;
128 bg->y = 0;
129 bg->refx = 0;
130 bg->refy = 0;
131 bg->dx = 256;
132 bg->dmx = 0;
133 bg->dy = 0;
134 bg->dmy = 256;
135 bg->sx = 0;
136 bg->sy = 0;
137 }
138}
139
140static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer) {
141 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
142 UNUSED(softwareRenderer);
143}
144
145static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
146 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
147 if (softwareRenderer->ioCache[address >> 1] == value) {
148 return value;
149 }
150 switch (address) {
151 case REG_DISPCNT:
152 softwareRenderer->dispcnt = value;
153 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
154 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
155 break;
156 case REG_BG0CNT:
157 value &= 0xDFFF;
158 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
159 if (softwareRenderer->bg[0].enabled) {
160 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
161 }
162 break;
163 case REG_BG1CNT:
164 value &= 0xDFFF;
165 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
166 if (softwareRenderer->bg[1].enabled) {
167 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
168 }
169 break;
170 case REG_BG2CNT:
171 value &= 0xFFFF;
172 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
173 if (softwareRenderer->bg[2].enabled) {
174 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
175 }
176 break;
177 case REG_BG3CNT:
178 value &= 0xFFFF;
179 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
180 if (softwareRenderer->bg[3].enabled) {
181 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
182 }
183 break;
184 case REG_BG0HOFS:
185 value &= 0x01FF;
186 softwareRenderer->bg[0].x = value;
187 if (softwareRenderer->bg[0].enabled && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
188 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
189 }
190 break;
191 case REG_BG0VOFS:
192 value &= 0x01FF;
193 softwareRenderer->bg[0].y = value;
194 if (softwareRenderer->bg[0].enabled && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
195 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
196 }
197 break;
198 case REG_BG1HOFS:
199 value &= 0x01FF;
200 softwareRenderer->bg[1].x = value;
201 if (softwareRenderer->bg[1].enabled && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
202 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
203 }
204 break;
205 case REG_BG1VOFS:
206 value &= 0x01FF;
207 softwareRenderer->bg[1].y = value;
208 if (softwareRenderer->bg[1].enabled && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) < 2) {
209 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
210 }
211 break;
212 case REG_BG2HOFS:
213 value &= 0x01FF;
214 softwareRenderer->bg[2].x = value;
215 if (softwareRenderer->bg[2].enabled && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) == 0) {
216 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
217 }
218 break;
219 case REG_BG2VOFS:
220 value &= 0x01FF;
221 softwareRenderer->bg[2].y = value;
222 if (softwareRenderer->bg[2].enabled && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) == 0) {
223 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
224 }
225 break;
226 case REG_BG3HOFS:
227 value &= 0x01FF;
228 softwareRenderer->bg[3].x = value;
229 if (softwareRenderer->bg[3].enabled && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) == 0) {
230 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
231 }
232 break;
233 case REG_BG3VOFS:
234 value &= 0x01FF;
235 softwareRenderer->bg[3].y = value;
236 if (softwareRenderer->bg[2].enabled && GBARegisterDISPCNTGetMode(softwareRenderer->dispcnt) == 0) {
237 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
238 }
239 break;
240 case REG_BG2PA:
241 softwareRenderer->bg[2].dx = value;
242 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
243 break;
244 case REG_BG2PB:
245 softwareRenderer->bg[2].dmx = value;
246 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
247 break;
248 case REG_BG2PC:
249 softwareRenderer->bg[2].dy = value;
250 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
251 break;
252 case REG_BG2PD:
253 softwareRenderer->bg[2].dmy = value;
254 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
255 break;
256 case REG_BG2X_LO:
257 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[2], value);
258 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
259 break;
260 case REG_BG2X_HI:
261 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[2], value);
262 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
263 break;
264 case REG_BG2Y_LO:
265 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[2], value);
266 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
267 break;
268 case REG_BG2Y_HI:
269 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[2], value);
270 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
271 break;
272 case REG_BG3PA:
273 softwareRenderer->bg[3].dx = value;
274 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
275 break;
276 case REG_BG3PB:
277 softwareRenderer->bg[3].dmx = value;
278 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
279 break;
280 case REG_BG3PC:
281 softwareRenderer->bg[3].dy = value;
282 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
283 break;
284 case REG_BG3PD:
285 softwareRenderer->bg[3].dmy = value;
286 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
287 break;
288 case REG_BG3X_LO:
289 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[3], value);
290 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
291 break;
292 case REG_BG3X_HI:
293 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[3], value);
294 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
295 break;
296 case REG_BG3Y_LO:
297 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[3], value);
298 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
299 break;
300 case REG_BG3Y_HI:
301 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[3], value);
302 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
303 break;
304 case REG_BLDCNT:
305 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
306 value &= 0x3FFF;
307 break;
308 case REG_BLDALPHA:
309 softwareRenderer->blda = value & 0x1F;
310 if (softwareRenderer->blda > 0x10) {
311 softwareRenderer->blda = 0x10;
312 }
313 softwareRenderer->bldb = (value >> 8) & 0x1F;
314 if (softwareRenderer->bldb > 0x10) {
315 softwareRenderer->bldb = 0x10;
316 }
317 value &= 0x1F1F;
318 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
319 break;
320 case REG_BLDY:
321 value &= 0x1F;
322 if (value > 0x10) {
323 value = 0x10;
324 }
325 if (softwareRenderer->bldy != value) {
326 softwareRenderer->bldy = value;
327 softwareRenderer->blendDirty = true;
328 }
329 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
330 break;
331 case REG_WIN0H:
332 softwareRenderer->winN[0].h.end = value;
333 softwareRenderer->winN[0].h.start = value >> 8;
334 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end) {
335 softwareRenderer->winN[0].h.start = 0;
336 }
337 if (softwareRenderer->winN[0].h.end > VIDEO_HORIZONTAL_PIXELS) {
338 softwareRenderer->winN[0].h.end = VIDEO_HORIZONTAL_PIXELS;
339 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS) {
340 softwareRenderer->winN[0].h.start = VIDEO_HORIZONTAL_PIXELS;
341 }
342 }
343 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
344 break;
345 case REG_WIN1H:
346 softwareRenderer->winN[1].h.end = value;
347 softwareRenderer->winN[1].h.start = value >> 8;
348 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end) {
349 softwareRenderer->winN[1].h.start = 0;
350 }
351 if (softwareRenderer->winN[1].h.end > VIDEO_HORIZONTAL_PIXELS) {
352 softwareRenderer->winN[1].h.end = VIDEO_HORIZONTAL_PIXELS;
353 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS) {
354 softwareRenderer->winN[1].h.start = VIDEO_HORIZONTAL_PIXELS;
355 }
356 }
357 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
358 break;
359 case REG_WIN0V:
360 softwareRenderer->winN[0].v.end = value;
361 softwareRenderer->winN[0].v.start = value >> 8;
362 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end) {
363 softwareRenderer->winN[0].v.start = 0;
364 }
365 if (softwareRenderer->winN[0].v.end > VIDEO_VERTICAL_PIXELS) {
366 softwareRenderer->winN[0].v.end = VIDEO_VERTICAL_PIXELS;
367 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS) {
368 softwareRenderer->winN[0].v.start = VIDEO_VERTICAL_PIXELS;
369 }
370 }
371 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
372 break;
373 case REG_WIN1V:
374 softwareRenderer->winN[1].v.end = value;
375 softwareRenderer->winN[1].v.start = value >> 8;
376 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end) {
377 softwareRenderer->winN[1].v.start = 0;
378 }
379 if (softwareRenderer->winN[1].v.end > VIDEO_VERTICAL_PIXELS) {
380 softwareRenderer->winN[1].v.end = VIDEO_VERTICAL_PIXELS;
381 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS) {
382 softwareRenderer->winN[1].v.start = VIDEO_VERTICAL_PIXELS;
383 }
384 }
385 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
386 break;
387 case REG_WININ:
388 value &= 0x3F3F;
389 softwareRenderer->winN[0].control.packed = value;
390 softwareRenderer->winN[1].control.packed = value >> 8;
391 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
392 break;
393 case REG_WINOUT:
394 value &= 0x3F3F;
395 softwareRenderer->winout.packed = value;
396 softwareRenderer->objwin.packed = value >> 8;
397 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
398 break;
399 case REG_MOSAIC:
400 softwareRenderer->mosaic = value;
401 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
402 break;
403 case REG_GREENSWP:
404 mLOG(GBA_VIDEO, STUB, "Stub video register write: 0x%03X", address);
405 break;
406 default:
407 mLOG(GBA_VIDEO, GAME_ERROR, "Invalid video register: 0x%03X", address);
408 }
409 softwareRenderer->ioCache[address >> 1] = value;
410 return value;
411}
412
413static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
414 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
415 if (renderer->cache) {
416 mTileCacheWriteVRAM(renderer->cache, address);
417 }
418 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
419}
420
421static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
422 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
423 UNUSED(oam);
424 softwareRenderer->oamDirty = 1;
425 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
426}
427
428static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
429 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
430 color_t color = mColorFrom555(value);
431 softwareRenderer->normalPalette[address >> 1] = color;
432 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
433 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
434 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
435 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
436 }
437 if (renderer->cache) {
438 mTileCacheWritePalette(renderer->cache, address);
439 }
440 memset(softwareRenderer->scanlineDirty, 0xFFFFFFFF, sizeof(softwareRenderer->scanlineDirty));
441}
442
443static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
444 if (win->v.end >= win->v.start) {
445 if (y >= win->v.end) {
446 return;
447 }
448 if (y < win->v.start) {
449 return;
450 }
451 } else if (y >= win->v.end && y < win->v.start) {
452 return;
453 }
454 if (win->h.end > VIDEO_HORIZONTAL_PIXELS || win->h.end < win->h.start) {
455 struct WindowN splits[2] = { *win, *win };
456 splits[0].h.start = 0;
457 splits[1].h.end = VIDEO_HORIZONTAL_PIXELS;
458 _breakWindowInner(softwareRenderer, &splits[0]);
459 _breakWindowInner(softwareRenderer, &splits[1]);
460 } else {
461 _breakWindowInner(softwareRenderer, win);
462 }
463}
464
465static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
466 int activeWindow;
467 int startX = 0;
468 if (win->h.end > 0) {
469 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
470 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
471 // Insert a window before the end of the active window
472 struct Window oldWindow = softwareRenderer->windows[activeWindow];
473 if (win->h.start > startX) {
474 // And after the start of the active window
475 int nextWindow = softwareRenderer->nWindows;
476 ++softwareRenderer->nWindows;
477 for (; nextWindow > activeWindow; --nextWindow) {
478 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
479 }
480 softwareRenderer->windows[activeWindow].endX = win->h.start;
481 ++activeWindow;
482 }
483 softwareRenderer->windows[activeWindow].control = win->control;
484 softwareRenderer->windows[activeWindow].endX = win->h.end;
485 if (win->h.end >= oldWindow.endX) {
486 // Trim off extra windows we've overwritten
487 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
488 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
489 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write will occur");
490 return;
491 }
492 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
493 --softwareRenderer->nWindows;
494 }
495 } else {
496 ++activeWindow;
497 int nextWindow = softwareRenderer->nWindows;
498 ++softwareRenderer->nWindows;
499 for (; nextWindow > activeWindow; --nextWindow) {
500 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
501 }
502 softwareRenderer->windows[activeWindow] = oldWindow;
503 }
504 break;
505 }
506 startX = softwareRenderer->windows[activeWindow].endX;
507 }
508 }
509#ifdef DEBUG
510 if (softwareRenderer->nWindows > MAX_WINDOW) {
511 mLOG(GBA_VIDEO, FATAL, "Out of bounds window write occurred!");
512 }
513#endif
514}
515
516static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer) {
517 int i;
518 int oamMax = 0;
519 for (i = 0; i < 128; ++i) {
520 struct GBAObj obj;
521 LOAD_16(obj.a, 0, &renderer->d.oam->obj[i].a);
522 LOAD_16(obj.b, 0, &renderer->d.oam->obj[i].b);
523 LOAD_16(obj.c, 0, &renderer->d.oam->obj[i].c);
524 if (GBAObjAttributesAIsTransformed(obj.a) || !GBAObjAttributesAIsDisable(obj.a)) {
525 int height = GBAVideoObjSizes[GBAObjAttributesAGetShape(obj.a) * 4 + GBAObjAttributesBGetSize(obj.b)][1];
526 if (GBAObjAttributesAIsTransformed(obj.a)) {
527 height <<= GBAObjAttributesAGetDoubleSize(obj.a);
528 }
529 if (GBAObjAttributesAGetY(obj.a) < VIDEO_VERTICAL_PIXELS || GBAObjAttributesAGetY(obj.a) + height >= VIDEO_VERTICAL_TOTAL_PIXELS) {
530 renderer->sprites[oamMax].y = GBAObjAttributesAGetY(obj.a);
531 renderer->sprites[oamMax].endY = GBAObjAttributesAGetY(obj.a) + height;
532 renderer->sprites[oamMax].obj = obj;
533 ++oamMax;
534 }
535 }
536 }
537 renderer->oamMax = oamMax;
538 renderer->oamDirty = 0;
539}
540
541static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
542 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
543
544 if (!(softwareRenderer->scanlineDirty[y >> 5] & (1 << (y & 0x1F)))) {
545 return;
546 }
547
548 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
549 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
550 int x;
551 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
552 row[x] = GBA_COLOR_WHITE;
553 }
554 return;
555 }
556
557 int x;
558 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; x += 4) {
559 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
560 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
561 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
562 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
563 }
564
565 softwareRenderer->windows[0].endX = VIDEO_HORIZONTAL_PIXELS;
566 softwareRenderer->nWindows = 1;
567 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
568 softwareRenderer->windows[0].control = softwareRenderer->winout;
569 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
570 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
571 }
572 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
573 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
574 }
575 } else {
576 softwareRenderer->windows[0].control.packed = 0xFF;
577 }
578
579 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
580 if (softwareRenderer->blendDirty) {
581 _updatePalettes(softwareRenderer);
582 softwareRenderer->blendDirty = false;
583 }
584
585 int w;
586 x = 0;
587 for (w = 0; w < softwareRenderer->nWindows; ++w) {
588 // TOOD: handle objwin on backdrop
589 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
590 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
591 backdrop |= softwareRenderer->normalPalette[0];
592 } else {
593 backdrop |= softwareRenderer->variantPalette[0];
594 }
595 int end = softwareRenderer->windows[w].endX;
596 for (; x < end - 3; x += 4) {
597 softwareRenderer->row[x] = backdrop;
598 softwareRenderer->row[x + 1] = backdrop;
599 softwareRenderer->row[x + 2] = backdrop;
600 softwareRenderer->row[x + 3] = backdrop;
601 }
602 for (; x < end; ++x) {
603 softwareRenderer->row[x] = backdrop;
604 }
605 }
606
607 _drawScanline(softwareRenderer, y);
608
609 if (softwareRenderer->target2Bd) {
610 x = 0;
611 for (w = 0; w < softwareRenderer->nWindows; ++w) {
612 uint32_t backdrop = 0;
613 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
614 backdrop |= softwareRenderer->normalPalette[0];
615 } else {
616 backdrop |= softwareRenderer->variantPalette[0];
617 }
618 int end = softwareRenderer->windows[w].endX;
619 for (; x < end; ++x) {
620 uint32_t color = softwareRenderer->row[x];
621 if (color & FLAG_TARGET_1) {
622 softwareRenderer->row[x] = _mix(softwareRenderer->bldb, backdrop, softwareRenderer->blda, color);
623 }
624 }
625 }
626 }
627 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
628 x = 0;
629 for (w = 0; w < softwareRenderer->nWindows; ++w) {
630 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
631 continue;
632 }
633 int end = softwareRenderer->windows[w].endX;
634 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
635 for (; x < end; ++x) {
636 uint32_t color = softwareRenderer->row[x];
637 if ((color & 0xFF000000) == FLAG_REBLEND) {
638 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
639 }
640 }
641 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
642 for (; x < end; ++x) {
643 uint32_t color = softwareRenderer->row[x];
644 if ((color & 0xFF000000) == FLAG_REBLEND) {
645 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
646 }
647 }
648 }
649 }
650 }
651
652#ifdef COLOR_16_BIT
653#if defined(__ARM_NEON) && !defined(__APPLE__)
654 _to16Bit(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS);
655#else
656 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
657 row[x] = softwareRenderer->row[x];
658 }
659#endif
660#else
661 memcpy(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS * sizeof(*row));
662#endif
663 softwareRenderer->scanlineDirty[y >> 5] &= ~(1 << (y & 0x1F));
664}
665
666static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
667 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
668
669 if (softwareRenderer->temporaryBuffer) {
670 mappedMemoryFree(softwareRenderer->temporaryBuffer, VIDEO_HORIZONTAL_PIXELS * VIDEO_VERTICAL_PIXELS * 4);
671 softwareRenderer->temporaryBuffer = 0;
672 }
673 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
674 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
675 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
676 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
677}
678
679static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels) {
680 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
681 *stride = softwareRenderer->outputBufferStride;
682 *pixels = softwareRenderer->outputBuffer;
683}
684
685static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels) {
686 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
687
688 const color_t* colorPixels = pixels;
689 unsigned i;
690 for (i = 0; i < VIDEO_VERTICAL_PIXELS; ++i) {
691 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], VIDEO_HORIZONTAL_PIXELS * BYTES_PER_PIXEL);
692 }
693}
694
695static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
696 renderer->bg[0].enabled = GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt) && !renderer->d.disableBG[0];
697 renderer->bg[1].enabled = GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt) && !renderer->d.disableBG[1];
698 renderer->bg[2].enabled = GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt) && !renderer->d.disableBG[2];
699 renderer->bg[3].enabled = GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt) && !renderer->d.disableBG[3];
700}
701
702static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
703 UNUSED(renderer);
704 bg->priority = GBARegisterBGCNTGetPriority(value);
705 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
706 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
707 bg->multipalette = GBARegisterBGCNTGet256Color(value);
708 bg->screenBase = GBARegisterBGCNTGetScreenBase(value) << 11;
709 bg->overflow = GBARegisterBGCNTGetOverflow(value);
710 bg->size = GBARegisterBGCNTGetSize(value);
711}
712
713static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
714 bg->refx = (bg->refx & 0xFFFF0000) | value;
715 bg->sx = bg->refx;
716}
717
718static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
719 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
720 bg->refx <<= 4;
721 bg->refx >>= 4;
722 bg->sx = bg->refx;
723}
724
725static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
726 bg->refy = (bg->refy & 0xFFFF0000) | value;
727 bg->sy = bg->refy;
728}
729
730static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
731 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
732 bg->refy <<= 4;
733 bg->refy >>= 4;
734 bg->sy = bg->refy;
735}
736
737static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
738 enum BlendEffect oldEffect = renderer->blendEffect;
739
740 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
741 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
742 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
743 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
744 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
745 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
746 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
747 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
748
749 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
750 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
751 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
752 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
753 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
754
755 if (oldEffect != renderer->blendEffect) {
756 renderer->blendDirty = true;
757 }
758}
759
760#define TEST_LAYER_ENABLED(X) \
761 (renderer->bg[X].enabled && \
762 (GBAWindowControlIsBg ## X ## Enable(renderer->currentWindow.packed) || \
763 (GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt) && GBAWindowControlIsBg ## X ## Enable (renderer->objwin.packed))) && \
764 renderer->bg[X].priority == priority)
765
766static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y) {
767 int w;
768 renderer->end = 0;
769 int spriteLayers = 0;
770 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
771 if (renderer->oamDirty) {
772 _cleanOAM(renderer);
773 }
774 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
775 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
776 int mosaicY = y - (y % mosaicV);
777 for (w = 0; w < renderer->nWindows; ++w) {
778 renderer->start = renderer->end;
779 renderer->end = renderer->windows[w].endX;
780 renderer->currentWindow = renderer->windows[w].control;
781 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
782 continue;
783 }
784 int i;
785 int drawn;
786
787 for (i = 0; i < renderer->oamMax; ++i) {
788 int localY = y;
789 if (renderer->spriteCyclesRemaining <= 0) {
790 break;
791 }
792 struct GBAVideoSoftwareSprite* sprite = &renderer->sprites[i];
793 if (GBAObjAttributesAIsMosaic(sprite->obj.a)) {
794 localY = mosaicY;
795 }
796 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
797 continue;
798 }
799 drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, localY);
800 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
801 }
802 }
803 }
804
805 unsigned priority;
806 for (priority = 0; priority < 4; ++priority) {
807 renderer->end = 0;
808 for (w = 0; w < renderer->nWindows; ++w) {
809 renderer->start = renderer->end;
810 renderer->end = renderer->windows[w].endX;
811 renderer->currentWindow = renderer->windows[w].control;
812 if (spriteLayers & (1 << priority)) {
813 GBAVideoSoftwareRendererPostprocessSprite(renderer, priority);
814 }
815 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
816 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[0], y);
817 }
818 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
819 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[1], y);
820 }
821 if (TEST_LAYER_ENABLED(2)) {
822 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
823 case 0:
824 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[2], y);
825 break;
826 case 1:
827 case 2:
828 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[2], y);
829 break;
830 case 3:
831 GBAVideoSoftwareRendererDrawBackgroundMode3(renderer, &renderer->bg[2], y);
832 break;
833 case 4:
834 GBAVideoSoftwareRendererDrawBackgroundMode4(renderer, &renderer->bg[2], y);
835 break;
836 case 5:
837 GBAVideoSoftwareRendererDrawBackgroundMode5(renderer, &renderer->bg[2], y);
838 break;
839 }
840 }
841 if (TEST_LAYER_ENABLED(3)) {
842 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
843 case 0:
844 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[3], y);
845 break;
846 case 2:
847 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[3], y);
848 break;
849 }
850 }
851 }
852 }
853 if (GBARegisterDISPCNTGetMode(renderer->dispcnt) != 0) {
854 renderer->bg[2].sx += renderer->bg[2].dmx;
855 renderer->bg[2].sy += renderer->bg[2].dmy;
856 renderer->bg[3].sx += renderer->bg[3].dmx;
857 renderer->bg[3].sy += renderer->bg[3].dmy;
858 }
859}
860
861static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
862 int i;
863 if (renderer->blendEffect == BLEND_BRIGHTEN) {
864 for (i = 0; i < 512; ++i) {
865 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
866 }
867 } else if (renderer->blendEffect == BLEND_DARKEN) {
868 for (i = 0; i < 512; ++i) {
869 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
870 }
871 } else {
872 for (i = 0; i < 512; ++i) {
873 renderer->variantPalette[i] = renderer->normalPalette[i];
874 }
875 }
876}