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 "software-private.h"
7
8#include "gba/gba.h"
9#include "gba/io.h"
10
11#include "util/arm-algo.h"
12#include "util/memory.h"
13
14static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer);
15static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer);
16static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer);
17static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address);
18static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam);
19static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
20static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
21static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y);
22static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer);
23static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, unsigned* stride, const void** pixels);
24static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, unsigned stride, void* pixels);
25
26static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer);
27static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value);
28static void GBAVideoSoftwareRendererWriteBGPA(struct GBAVideoSoftwareBackground* bg, uint16_t value);
29static void GBAVideoSoftwareRendererWriteBGPB(struct GBAVideoSoftwareBackground* bg, uint16_t value);
30static void GBAVideoSoftwareRendererWriteBGPC(struct GBAVideoSoftwareBackground* bg, uint16_t value);
31static void GBAVideoSoftwareRendererWriteBGPD(struct GBAVideoSoftwareBackground* bg, uint16_t value);
32static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value);
33static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value);
34static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value);
35static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value);
36static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value);
37
38static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer);
39static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y);
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
65 renderer->temporaryBuffer = 0;
66}
67
68static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer) {
69 GBAVideoSoftwareRendererReset(renderer);
70
71 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
72
73 int y;
74 for (y = 0; y < VIDEO_VERTICAL_PIXELS; ++y) {
75 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
76 int x;
77 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
78 row[x] = GBA_COLOR_WHITE;
79 }
80 }
81}
82
83static void GBAVideoSoftwareRendererReset(struct GBAVideoRenderer* renderer) {
84 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
85 int i;
86
87 softwareRenderer->dispcnt = 0x0080;
88
89 softwareRenderer->target1Obj = 0;
90 softwareRenderer->target1Bd = 0;
91 softwareRenderer->target2Obj = 0;
92 softwareRenderer->target2Bd = 0;
93 softwareRenderer->blendEffect = BLEND_NONE;
94 memset(softwareRenderer->normalPalette, 0, sizeof(softwareRenderer->normalPalette));
95 memset(softwareRenderer->variantPalette, 0, sizeof(softwareRenderer->variantPalette));
96
97 softwareRenderer->blda = 0;
98 softwareRenderer->bldb = 0;
99 softwareRenderer->bldy = 0;
100
101 softwareRenderer->winN[0] = (struct WindowN) { .control = { .priority = 0 } };
102 softwareRenderer->winN[1] = (struct WindowN) { .control = { .priority = 1 } };
103 softwareRenderer->objwin = (struct WindowControl) { .priority = 2 };
104 softwareRenderer->winout = (struct WindowControl) { .priority = 3 };
105 softwareRenderer->oamMax = 0;
106
107 softwareRenderer->mosaic = 0;
108
109 for (i = 0; i < 4; ++i) {
110 struct GBAVideoSoftwareBackground* bg = &softwareRenderer->bg[i];
111 bg->index = i;
112 bg->enabled = 0;
113 bg->priority = 0;
114 bg->charBase = 0;
115 bg->mosaic = 0;
116 bg->multipalette = 0;
117 bg->screenBase = 0;
118 bg->overflow = 0;
119 bg->size = 0;
120 bg->target1 = 0;
121 bg->target2 = 0;
122 bg->x = 0;
123 bg->y = 0;
124 bg->refx = 0;
125 bg->refy = 0;
126 bg->dx = 256;
127 bg->dmx = 0;
128 bg->dy = 0;
129 bg->dmy = 256;
130 bg->sx = 0;
131 bg->sy = 0;
132 }
133}
134
135static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer) {
136 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
137 UNUSED(softwareRenderer);
138}
139
140static uint16_t GBAVideoSoftwareRendererWriteVideoRegister(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
141 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
142 switch (address) {
143 case REG_DISPCNT:
144 softwareRenderer->dispcnt = value;
145 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
146 break;
147 case REG_BG0CNT:
148 value &= 0xDFFF;
149 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[0], value);
150 break;
151 case REG_BG1CNT:
152 value &= 0xDFFF;
153 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[1], value);
154 break;
155 case REG_BG2CNT:
156 value &= 0xFFFF;
157 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[2], value);
158 break;
159 case REG_BG3CNT:
160 value &= 0xFFFF;
161 GBAVideoSoftwareRendererWriteBGCNT(softwareRenderer, &softwareRenderer->bg[3], value);
162 break;
163 case REG_BG0HOFS:
164 value &= 0x01FF;
165 softwareRenderer->bg[0].x = value;
166 break;
167 case REG_BG0VOFS:
168 value &= 0x01FF;
169 softwareRenderer->bg[0].y = value;
170 break;
171 case REG_BG1HOFS:
172 value &= 0x01FF;
173 softwareRenderer->bg[1].x = value;
174 break;
175 case REG_BG1VOFS:
176 value &= 0x01FF;
177 softwareRenderer->bg[1].y = value;
178 break;
179 case REG_BG2HOFS:
180 value &= 0x01FF;
181 softwareRenderer->bg[2].x = value;
182 break;
183 case REG_BG2VOFS:
184 value &= 0x01FF;
185 softwareRenderer->bg[2].y = value;
186 break;
187 case REG_BG3HOFS:
188 value &= 0x01FF;
189 softwareRenderer->bg[3].x = value;
190 break;
191 case REG_BG3VOFS:
192 value &= 0x01FF;
193 softwareRenderer->bg[3].y = value;
194 break;
195 case REG_BG2PA:
196 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[2], value);
197 break;
198 case REG_BG2PB:
199 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[2], value);
200 break;
201 case REG_BG2PC:
202 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[2], value);
203 break;
204 case REG_BG2PD:
205 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[2], value);
206 break;
207 case REG_BG2X_LO:
208 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[2], value);
209 break;
210 case REG_BG2X_HI:
211 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[2], value);
212 break;
213 case REG_BG2Y_LO:
214 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[2], value);
215 break;
216 case REG_BG2Y_HI:
217 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[2], value);
218 break;
219 case REG_BG3PA:
220 GBAVideoSoftwareRendererWriteBGPA(&softwareRenderer->bg[3], value);
221 break;
222 case REG_BG3PB:
223 GBAVideoSoftwareRendererWriteBGPB(&softwareRenderer->bg[3], value);
224 break;
225 case REG_BG3PC:
226 GBAVideoSoftwareRendererWriteBGPC(&softwareRenderer->bg[3], value);
227 break;
228 case REG_BG3PD:
229 GBAVideoSoftwareRendererWriteBGPD(&softwareRenderer->bg[3], value);
230 break;
231 case REG_BG3X_LO:
232 GBAVideoSoftwareRendererWriteBGX_LO(&softwareRenderer->bg[3], value);
233 break;
234 case REG_BG3X_HI:
235 GBAVideoSoftwareRendererWriteBGX_HI(&softwareRenderer->bg[3], value);
236 break;
237 case REG_BG3Y_LO:
238 GBAVideoSoftwareRendererWriteBGY_LO(&softwareRenderer->bg[3], value);
239 break;
240 case REG_BG3Y_HI:
241 GBAVideoSoftwareRendererWriteBGY_HI(&softwareRenderer->bg[3], value);
242 break;
243 case REG_BLDCNT:
244 GBAVideoSoftwareRendererWriteBLDCNT(softwareRenderer, value);
245 value &= 0x3FFF;
246 break;
247 case REG_BLDALPHA:
248 softwareRenderer->blda = value & 0x1F;
249 if (softwareRenderer->blda > 0x10) {
250 softwareRenderer->blda = 0x10;
251 }
252 softwareRenderer->bldb = (value >> 8) & 0x1F;
253 if (softwareRenderer->bldb > 0x10) {
254 softwareRenderer->bldb = 0x10;
255 }
256 value &= 0x1F1F;
257 break;
258 case REG_BLDY:
259 softwareRenderer->bldy = value & 0x1F;
260 if (softwareRenderer->bldy > 0x10) {
261 softwareRenderer->bldy = 0x10;
262 }
263 _updatePalettes(softwareRenderer);
264 break;
265 case REG_WIN0H:
266 softwareRenderer->winN[0].h.end = value;
267 softwareRenderer->winN[0].h.start = value >> 8;
268 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[0].h.start > softwareRenderer->winN[0].h.end) {
269 softwareRenderer->winN[0].h.start = 0;
270 }
271 if (softwareRenderer->winN[0].h.end > VIDEO_HORIZONTAL_PIXELS) {
272 softwareRenderer->winN[0].h.end = VIDEO_HORIZONTAL_PIXELS;
273 if (softwareRenderer->winN[0].h.start > VIDEO_HORIZONTAL_PIXELS) {
274 softwareRenderer->winN[0].h.start = VIDEO_HORIZONTAL_PIXELS;
275 }
276 }
277 break;
278 case REG_WIN1H:
279 softwareRenderer->winN[1].h.end = value;
280 softwareRenderer->winN[1].h.start = value >> 8;
281 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS && softwareRenderer->winN[1].h.start > softwareRenderer->winN[1].h.end) {
282 softwareRenderer->winN[1].h.start = 0;
283 }
284 if (softwareRenderer->winN[1].h.end > VIDEO_HORIZONTAL_PIXELS) {
285 softwareRenderer->winN[1].h.end = VIDEO_HORIZONTAL_PIXELS;
286 if (softwareRenderer->winN[1].h.start > VIDEO_HORIZONTAL_PIXELS) {
287 softwareRenderer->winN[1].h.start = VIDEO_HORIZONTAL_PIXELS;
288 }
289 }
290 break;
291 case REG_WIN0V:
292 softwareRenderer->winN[0].v.end = value;
293 softwareRenderer->winN[0].v.start = value >> 8;
294 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[0].v.start > softwareRenderer->winN[0].v.end) {
295 softwareRenderer->winN[0].v.start = 0;
296 }
297 if (softwareRenderer->winN[0].v.end > VIDEO_VERTICAL_PIXELS) {
298 softwareRenderer->winN[0].v.end = VIDEO_VERTICAL_PIXELS;
299 if (softwareRenderer->winN[0].v.start > VIDEO_VERTICAL_PIXELS) {
300 softwareRenderer->winN[0].v.start = VIDEO_VERTICAL_PIXELS;
301 }
302 }
303 break;
304 case REG_WIN1V:
305 softwareRenderer->winN[1].v.end = value;
306 softwareRenderer->winN[1].v.start = value >> 8;
307 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS && softwareRenderer->winN[1].v.start > softwareRenderer->winN[1].v.end) {
308 softwareRenderer->winN[1].v.start = 0;
309 }
310 if (softwareRenderer->winN[1].v.end > VIDEO_VERTICAL_PIXELS) {
311 softwareRenderer->winN[1].v.end = VIDEO_VERTICAL_PIXELS;
312 if (softwareRenderer->winN[1].v.start > VIDEO_VERTICAL_PIXELS) {
313 softwareRenderer->winN[1].v.start = VIDEO_VERTICAL_PIXELS;
314 }
315 }
316 break;
317 case REG_WININ:
318 value &= 0x3F3F;
319 softwareRenderer->winN[0].control.packed = value;
320 softwareRenderer->winN[1].control.packed = value >> 8;
321 break;
322 case REG_WINOUT:
323 value &= 0x3F3F;
324 softwareRenderer->winout.packed = value;
325 softwareRenderer->objwin.packed = value >> 8;
326 break;
327 case REG_MOSAIC:
328 softwareRenderer->mosaic = value;
329 break;
330 case REG_GREENSWP:
331 GBALog(0, GBA_LOG_STUB, "Stub video register write: 0x%03X", address);
332 break;
333 default:
334 GBALog(0, GBA_LOG_GAME_ERROR, "Invalid video register: 0x%03X", address);
335 }
336 return value;
337}
338
339static void GBAVideoSoftwareRendererWriteVRAM(struct GBAVideoRenderer* renderer, uint32_t address) {
340 UNUSED(renderer);
341 UNUSED(address);
342}
343
344static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam) {
345 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
346 softwareRenderer->oamDirty = 1;
347 UNUSED(oam);
348}
349
350static void GBAVideoSoftwareRendererWritePalette(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value) {
351 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
352#ifdef COLOR_16_BIT
353#ifdef COLOR_5_6_5
354 unsigned color = 0;
355 color |= (value & 0x001F) << 11;
356 color |= (value & 0x03E0) << 1;
357 color |= (value & 0x7C00) >> 10;
358#else
359 unsigned color = value;
360#endif
361#else
362 unsigned color = 0;
363 color |= (value << 3) & 0xF8;
364 color |= (value << 6) & 0xF800;
365 color |= (value << 9) & 0xF80000;
366#endif
367 softwareRenderer->normalPalette[address >> 1] = color;
368 if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
369 softwareRenderer->variantPalette[address >> 1] = _brighten(color, softwareRenderer->bldy);
370 } else if (softwareRenderer->blendEffect == BLEND_DARKEN) {
371 softwareRenderer->variantPalette[address >> 1] = _darken(color, softwareRenderer->bldy);
372 }
373}
374
375static void _breakWindow(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win, int y) {
376 if (win->v.end >= win->v.start) {
377 if (y >= win->v.end) {
378 return;
379 }
380 if (y < win->v.start) {
381 return;
382 }
383 } else if (y >= win->v.end && y < win->v.start) {
384 return;
385 }
386 if (win->h.end > VIDEO_HORIZONTAL_PIXELS || win->h.end < win->h.start) {
387 struct WindowN splits[2] = { *win, *win };
388 splits[0].h.start = 0;
389 splits[1].h.end = VIDEO_HORIZONTAL_PIXELS;
390 _breakWindowInner(softwareRenderer, &splits[0]);
391 _breakWindowInner(softwareRenderer, &splits[1]);
392 } else {
393 _breakWindowInner(softwareRenderer, win);
394 }
395}
396
397static void _breakWindowInner(struct GBAVideoSoftwareRenderer* softwareRenderer, struct WindowN* win) {
398 int activeWindow;
399 int startX = 0;
400 if (win->h.end > 0) {
401 for (activeWindow = 0; activeWindow < softwareRenderer->nWindows; ++activeWindow) {
402 if (win->h.start < softwareRenderer->windows[activeWindow].endX) {
403 // Insert a window before the end of the active window
404 struct Window oldWindow = softwareRenderer->windows[activeWindow];
405 if (win->h.start > startX) {
406 // And after the start of the active window
407 int nextWindow = softwareRenderer->nWindows;
408 ++softwareRenderer->nWindows;
409 for (; nextWindow > activeWindow; --nextWindow) {
410 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
411 }
412 softwareRenderer->windows[activeWindow].endX = win->h.start;
413 ++activeWindow;
414 }
415 softwareRenderer->windows[activeWindow].control = win->control;
416 softwareRenderer->windows[activeWindow].endX = win->h.end;
417 if (win->h.end >= oldWindow.endX) {
418 // Trim off extra windows we've overwritten
419 for (++activeWindow; softwareRenderer->nWindows > activeWindow + 1 && win->h.end >= softwareRenderer->windows[activeWindow].endX; ++activeWindow) {
420 if (VIDEO_CHECKS && activeWindow >= MAX_WINDOW) {
421 GBALog(0, GBA_LOG_FATAL, "Out of bounds window write will occur");
422 return;
423 }
424 softwareRenderer->windows[activeWindow] = softwareRenderer->windows[activeWindow + 1];
425 --softwareRenderer->nWindows;
426 }
427 } else {
428 ++activeWindow;
429 int nextWindow = softwareRenderer->nWindows;
430 ++softwareRenderer->nWindows;
431 for (; nextWindow > activeWindow; --nextWindow) {
432 softwareRenderer->windows[nextWindow] = softwareRenderer->windows[nextWindow - 1];
433 }
434 softwareRenderer->windows[activeWindow] = oldWindow;
435 }
436 break;
437 }
438 startX = softwareRenderer->windows[activeWindow].endX;
439 }
440 }
441#ifdef DEBUG
442 if (softwareRenderer->nWindows > MAX_WINDOW) {
443 GBALog(0, GBA_LOG_FATAL, "Out of bounds window write occurred!");
444 }
445#endif
446}
447
448static void _cleanOAM(struct GBAVideoSoftwareRenderer* renderer) {
449 int i;
450 int oamMax = 0;
451 for (i = 0; i < 128; ++i) {
452 struct GBAObj obj;
453 LOAD_16(obj.a, 0, &renderer->d.oam->obj[i].a);
454 LOAD_16(obj.b, 0, &renderer->d.oam->obj[i].b);
455 LOAD_16(obj.c, 0, &renderer->d.oam->obj[i].c);
456 if (GBAObjAttributesAIsTransformed(obj.a) || !GBAObjAttributesAIsDisable(obj.a)) {
457 int height = GBAVideoObjSizes[GBAObjAttributesAGetShape(obj.a) * 4 + GBAObjAttributesBGetSize(obj.b)][1];
458 if (GBAObjAttributesAIsTransformed(obj.a)) {
459 height <<= GBAObjAttributesAGetDoubleSize(obj.a);
460 }
461 if (GBAObjAttributesAGetY(obj.a) < VIDEO_VERTICAL_PIXELS || GBAObjAttributesAGetY(obj.a) + height >= VIDEO_VERTICAL_TOTAL_PIXELS) {
462 renderer->sprites[oamMax].y = GBAObjAttributesAGetY(obj.a);
463 renderer->sprites[oamMax].endY = GBAObjAttributesAGetY(obj.a) + height;
464 renderer->sprites[oamMax].obj = obj;
465 ++oamMax;
466 }
467 }
468 }
469 renderer->oamMax = oamMax;
470 renderer->oamDirty = 0;
471}
472
473static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* renderer, int y) {
474 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
475
476 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y];
477 if (GBARegisterDISPCNTIsForcedBlank(softwareRenderer->dispcnt)) {
478 int x;
479 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
480 row[x] = GBA_COLOR_WHITE;
481 }
482 return;
483 }
484
485 int x;
486 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; x += 4) {
487 softwareRenderer->spriteLayer[x] = FLAG_UNWRITTEN;
488 softwareRenderer->spriteLayer[x + 1] = FLAG_UNWRITTEN;
489 softwareRenderer->spriteLayer[x + 2] = FLAG_UNWRITTEN;
490 softwareRenderer->spriteLayer[x + 3] = FLAG_UNWRITTEN;
491 }
492
493 softwareRenderer->windows[0].endX = VIDEO_HORIZONTAL_PIXELS;
494 softwareRenderer->nWindows = 1;
495 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt) || GBARegisterDISPCNTIsObjwinEnable(softwareRenderer->dispcnt)) {
496 softwareRenderer->windows[0].control = softwareRenderer->winout;
497 if (GBARegisterDISPCNTIsWin1Enable(softwareRenderer->dispcnt)) {
498 _breakWindow(softwareRenderer, &softwareRenderer->winN[1], y);
499 }
500 if (GBARegisterDISPCNTIsWin0Enable(softwareRenderer->dispcnt)) {
501 _breakWindow(softwareRenderer, &softwareRenderer->winN[0], y);
502 }
503 } else {
504 softwareRenderer->windows[0].control.packed = 0xFF;
505 }
506
507 GBAVideoSoftwareRendererUpdateDISPCNT(softwareRenderer);
508
509 int w;
510 x = 0;
511 for (w = 0; w < softwareRenderer->nWindows; ++w) {
512 // TOOD: handle objwin on backdrop
513 uint32_t backdrop = FLAG_UNWRITTEN | FLAG_PRIORITY | FLAG_IS_BACKGROUND;
514 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
515 backdrop |= softwareRenderer->normalPalette[0];
516 } else {
517 backdrop |= softwareRenderer->variantPalette[0];
518 }
519 int end = softwareRenderer->windows[w].endX;
520 for (; x < end; ++x) {
521 softwareRenderer->row[x] = backdrop;
522 }
523 }
524
525 _drawScanline(softwareRenderer, y);
526
527 if (softwareRenderer->target2Bd) {
528 x = 0;
529 for (w = 0; w < softwareRenderer->nWindows; ++w) {
530 uint32_t backdrop = 0;
531 if (!softwareRenderer->target1Bd || softwareRenderer->blendEffect == BLEND_NONE || softwareRenderer->blendEffect == BLEND_ALPHA || !GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
532 backdrop |= softwareRenderer->normalPalette[0];
533 } else {
534 backdrop |= softwareRenderer->variantPalette[0];
535 }
536 int end = softwareRenderer->windows[w].endX;
537 for (; x < end; ++x) {
538 uint32_t color = softwareRenderer->row[x];
539 if (color & FLAG_TARGET_1) {
540 softwareRenderer->row[x] = _mix(softwareRenderer->bldb, backdrop, softwareRenderer->blda, color);
541 }
542 }
543 }
544 }
545 if (softwareRenderer->target1Obj && (softwareRenderer->blendEffect == BLEND_DARKEN || softwareRenderer->blendEffect == BLEND_BRIGHTEN)) {
546 x = 0;
547 for (w = 0; w < softwareRenderer->nWindows; ++w) {
548 if (!GBAWindowControlIsBlendEnable(softwareRenderer->windows[w].control.packed)) {
549 continue;
550 }
551 int end = softwareRenderer->windows[w].endX;
552 if (softwareRenderer->blendEffect == BLEND_DARKEN) {
553 for (; x < end; ++x) {
554 uint32_t color = softwareRenderer->row[x];
555 if ((color & 0xFF000000) == FLAG_REBLEND) {
556 softwareRenderer->row[x] = _darken(color, softwareRenderer->bldy);
557 }
558 }
559 } else if (softwareRenderer->blendEffect == BLEND_BRIGHTEN) {
560 for (; x < end; ++x) {
561 uint32_t color = softwareRenderer->row[x];
562 if ((color & 0xFF000000) == FLAG_REBLEND) {
563 softwareRenderer->row[x] = _brighten(color, softwareRenderer->bldy);
564 }
565 }
566 }
567 }
568 }
569
570#ifdef COLOR_16_BIT
571#if defined(__ARM_NEON) && !defined(__APPLE__)
572 _to16Bit(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS);
573#else
574 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
575 row[x] = softwareRenderer->row[x];
576 }
577#endif
578#else
579 memcpy(row, softwareRenderer->row, VIDEO_HORIZONTAL_PIXELS * sizeof(*row));
580#endif
581}
582
583static void GBAVideoSoftwareRendererFinishFrame(struct GBAVideoRenderer* renderer) {
584 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
585
586 if (softwareRenderer->temporaryBuffer) {
587 mappedMemoryFree(softwareRenderer->temporaryBuffer, VIDEO_HORIZONTAL_PIXELS * VIDEO_VERTICAL_PIXELS * 4);
588 softwareRenderer->temporaryBuffer = 0;
589 }
590 softwareRenderer->bg[2].sx = softwareRenderer->bg[2].refx;
591 softwareRenderer->bg[2].sy = softwareRenderer->bg[2].refy;
592 softwareRenderer->bg[3].sx = softwareRenderer->bg[3].refx;
593 softwareRenderer->bg[3].sy = softwareRenderer->bg[3].refy;
594}
595
596static void GBAVideoSoftwareRendererGetPixels(struct GBAVideoRenderer* renderer, unsigned* stride, const void** pixels) {
597 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
598
599#ifdef COLOR_16_BIT
600 *stride = VIDEO_HORIZONTAL_PIXELS;
601 if (!softwareRenderer->temporaryBuffer) {
602 softwareRenderer->temporaryBuffer = anonymousMemoryMap(VIDEO_HORIZONTAL_PIXELS * VIDEO_VERTICAL_PIXELS * 4);
603 }
604 *pixels = softwareRenderer->temporaryBuffer;
605 unsigned y, x;
606 for (y = 0; y < VIDEO_VERTICAL_PIXELS; ++y) {
607 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
608 color_t inColor = softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y + x];
609 uint32_t outColor;
610#ifdef COLOR_5_6_5
611 outColor = (inColor & 0x1F) << 19;
612 outColor |= (inColor & 0x7C0) << 5;
613 outColor |= (inColor & 0xF800) >> 8;
614#else
615 outColor = (inColor & 0x1F) << 3;
616 outColor |= (inColor & 0x3E0) << 6;
617 outColor |= (inColor & 0x7C00) << 9;
618#endif
619 softwareRenderer->temporaryBuffer[VIDEO_HORIZONTAL_PIXELS * y + x] = outColor;
620 }
621 }
622#else
623 *stride = softwareRenderer->outputBufferStride;
624 *pixels = softwareRenderer->outputBuffer;
625#endif
626}
627
628static void GBAVideoSoftwareRendererPutPixels(struct GBAVideoRenderer* renderer, unsigned stride, void* pixels) {
629 struct GBAVideoSoftwareRenderer* softwareRenderer = (struct GBAVideoSoftwareRenderer*) renderer;
630
631 uint32_t* colorPixels = pixels;
632 unsigned i;
633 for (i = 0; i < VIDEO_VERTICAL_PIXELS; ++i) {
634#ifdef COLOR_16_BIT
635 unsigned x;
636 for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
637 uint32_t inColor = colorPixels[stride * i + x];
638 color_t outColor;
639#ifdef COLOR_5_6_5
640 outColor = (inColor >> 19) & 0x1F;
641 outColor |= (inColor >> 5) & 0x7C0;
642 outColor |= (inColor << 8) & 0xF800;
643#else
644 outColor = (inColor >> 3) & 0x1F;
645 outColor |= (inColor >> 6) & 0x3E0;
646 outColor |= (inColor >> 9) & 0x7C00;
647#endif
648 softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i + x] = outColor;
649 }
650#else
651 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], VIDEO_HORIZONTAL_PIXELS * BYTES_PER_PIXEL);
652#endif
653 }
654}
655
656static void GBAVideoSoftwareRendererUpdateDISPCNT(struct GBAVideoSoftwareRenderer* renderer) {
657 renderer->bg[0].enabled = GBARegisterDISPCNTGetBg0Enable(renderer->dispcnt) && !renderer->d.disableBG[0];
658 renderer->bg[1].enabled = GBARegisterDISPCNTGetBg1Enable(renderer->dispcnt) && !renderer->d.disableBG[1];
659 renderer->bg[2].enabled = GBARegisterDISPCNTGetBg2Enable(renderer->dispcnt) && !renderer->d.disableBG[2];
660 renderer->bg[3].enabled = GBARegisterDISPCNTGetBg3Enable(renderer->dispcnt) && !renderer->d.disableBG[3];
661}
662
663static void GBAVideoSoftwareRendererWriteBGCNT(struct GBAVideoSoftwareRenderer* renderer, struct GBAVideoSoftwareBackground* bg, uint16_t value) {
664 UNUSED(renderer);
665 bg->priority = GBARegisterBGCNTGetPriority(value);
666 bg->charBase = GBARegisterBGCNTGetCharBase(value) << 14;
667 bg->mosaic = GBARegisterBGCNTGetMosaic(value);
668 bg->multipalette = GBARegisterBGCNTGet256Color(value);
669 bg->screenBase = GBARegisterBGCNTGetScreenBase(value) << 11;
670 bg->overflow = GBARegisterBGCNTGetOverflow(value);
671 bg->size = GBARegisterBGCNTGetSize(value);
672}
673
674static void GBAVideoSoftwareRendererWriteBGPA(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
675 bg->dx = value;
676}
677
678static void GBAVideoSoftwareRendererWriteBGPB(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
679 bg->dmx = value;
680}
681
682static void GBAVideoSoftwareRendererWriteBGPC(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
683 bg->dy = value;
684}
685
686static void GBAVideoSoftwareRendererWriteBGPD(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
687 bg->dmy = value;
688}
689
690static void GBAVideoSoftwareRendererWriteBGX_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
691 bg->refx = (bg->refx & 0xFFFF0000) | value;
692 bg->sx = bg->refx;
693}
694
695static void GBAVideoSoftwareRendererWriteBGX_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
696 bg->refx = (bg->refx & 0x0000FFFF) | (value << 16);
697 bg->refx <<= 4;
698 bg->refx >>= 4;
699 bg->sx = bg->refx;
700}
701
702static void GBAVideoSoftwareRendererWriteBGY_LO(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
703 bg->refy = (bg->refy & 0xFFFF0000) | value;
704 bg->sy = bg->refy;
705}
706
707static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackground* bg, uint16_t value) {
708 bg->refy = (bg->refy & 0x0000FFFF) | (value << 16);
709 bg->refy <<= 4;
710 bg->refy >>= 4;
711 bg->sy = bg->refy;
712}
713
714static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
715 enum BlendEffect oldEffect = renderer->blendEffect;
716
717 renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
718 renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
719 renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
720 renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
721 renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
722 renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
723 renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
724 renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
725
726 renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
727 renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
728 renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
729 renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
730 renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
731
732 if (oldEffect != renderer->blendEffect) {
733 _updatePalettes(renderer);
734 }
735}
736
737#define TEST_LAYER_ENABLED(X) \
738 (renderer->bg[X].enabled && \
739 (GBAWindowControlIsBg ## X ## Enable(renderer->currentWindow.packed) || \
740 (GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt) && GBAWindowControlIsBg ## X ## Enable (renderer->objwin.packed))) && \
741 renderer->bg[X].priority == priority)
742
743static void _drawScanline(struct GBAVideoSoftwareRenderer* renderer, int y) {
744 int w;
745 renderer->end = 0;
746 int spriteLayers = 0;
747 if (GBARegisterDISPCNTIsObjEnable(renderer->dispcnt) && !renderer->d.disableOBJ) {
748 if (renderer->oamDirty) {
749 _cleanOAM(renderer);
750 }
751 renderer->spriteCyclesRemaining = GBARegisterDISPCNTIsHblankIntervalFree(renderer->dispcnt) ? OBJ_HBLANK_FREE_LENGTH : OBJ_LENGTH;
752 int mosaicV = GBAMosaicControlGetObjV(renderer->mosaic) + 1;
753 int mosaicY = y - (y % mosaicV);
754 for (w = 0; w < renderer->nWindows; ++w) {
755 renderer->start = renderer->end;
756 renderer->end = renderer->windows[w].endX;
757 renderer->currentWindow = renderer->windows[w].control;
758 if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed) && !GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt)) {
759 continue;
760 }
761 int i;
762 int drawn;
763 for (i = 0; i < renderer->oamMax; ++i) {
764 int localY = y;
765 if (renderer->spriteCyclesRemaining <= 0) {
766 break;
767 }
768 struct GBAVideoSoftwareSprite* sprite = &renderer->sprites[i];
769 if (GBAObjAttributesAIsMosaic(sprite->obj.a)) {
770 localY = mosaicY;
771 }
772 if ((localY < sprite->y && (sprite->endY - 256 < 0 || localY >= sprite->endY - 256)) || localY >= sprite->endY) {
773 continue;
774 }
775 drawn = GBAVideoSoftwareRendererPreprocessSprite(renderer, &sprite->obj, localY);
776 spriteLayers |= drawn << GBAObjAttributesCGetPriority(sprite->obj.c);
777 }
778 }
779 }
780
781 unsigned priority;
782 for (priority = 0; priority < 4; ++priority) {
783 renderer->end = 0;
784 for (w = 0; w < renderer->nWindows; ++w) {
785 renderer->start = renderer->end;
786 renderer->end = renderer->windows[w].endX;
787 renderer->currentWindow = renderer->windows[w].control;
788 if (spriteLayers & (1 << priority)) {
789 GBAVideoSoftwareRendererPostprocessSprite(renderer, priority);
790 }
791 if (TEST_LAYER_ENABLED(0) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
792 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[0], y);
793 }
794 if (TEST_LAYER_ENABLED(1) && GBARegisterDISPCNTGetMode(renderer->dispcnt) < 2) {
795 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[1], y);
796 }
797 if (TEST_LAYER_ENABLED(2)) {
798 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
799 case 0:
800 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[2], y);
801 break;
802 case 1:
803 case 2:
804 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[2], y);
805 break;
806 case 3:
807 GBAVideoSoftwareRendererDrawBackgroundMode3(renderer, &renderer->bg[2], y);
808 break;
809 case 4:
810 GBAVideoSoftwareRendererDrawBackgroundMode4(renderer, &renderer->bg[2], y);
811 break;
812 case 5:
813 GBAVideoSoftwareRendererDrawBackgroundMode5(renderer, &renderer->bg[2], y);
814 break;
815 }
816 }
817 if (TEST_LAYER_ENABLED(3)) {
818 switch (GBARegisterDISPCNTGetMode(renderer->dispcnt)) {
819 case 0:
820 GBAVideoSoftwareRendererDrawBackgroundMode0(renderer, &renderer->bg[3], y);
821 break;
822 case 2:
823 GBAVideoSoftwareRendererDrawBackgroundMode2(renderer, &renderer->bg[3], y);
824 break;
825 }
826 }
827 }
828 }
829 renderer->bg[2].sx += renderer->bg[2].dmx;
830 renderer->bg[2].sy += renderer->bg[2].dmy;
831 renderer->bg[3].sx += renderer->bg[3].dmx;
832 renderer->bg[3].sy += renderer->bg[3].dmy;
833}
834
835static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
836 int i;
837 if (renderer->blendEffect == BLEND_BRIGHTEN) {
838 for (i = 0; i < 512; ++i) {
839 renderer->variantPalette[i] = _brighten(renderer->normalPalette[i], renderer->bldy);
840 }
841 } else if (renderer->blendEffect == BLEND_DARKEN) {
842 for (i = 0; i < 512; ++i) {
843 renderer->variantPalette[i] = _darken(renderer->normalPalette[i], renderer->bldy);
844 }
845 } else {
846 for (i = 0; i < 512; ++i) {
847 renderer->variantPalette[i] = renderer->normalPalette[i];
848 }
849 }
850}