src/gb/renderers/software.c (view raw)
1/* Copyright (c) 2013-2016 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 <mgba/internal/gb/renderers/software.h>
7
8#include <mgba/core/cache-set.h>
9#include <mgba/internal/gb/io.h>
10#include <mgba/internal/gb/renderers/cache-set.h>
11#include <mgba-util/math.h>
12#include <mgba-util/memory.h>
13
14static void GBVideoSoftwareRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool borders);
15static void GBVideoSoftwareRendererDeinit(struct GBVideoRenderer* renderer);
16static uint8_t GBVideoSoftwareRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value);
17static void GBVideoSoftwareRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data);
18static void GBVideoSoftwareRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value);
19static void GBVideoSoftwareRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address);
20static void GBVideoSoftwareRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam);
21static void GBVideoSoftwareRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax);
22static void GBVideoSoftwareRendererFinishScanline(struct GBVideoRenderer* renderer, int y);
23static void GBVideoSoftwareRendererFinishFrame(struct GBVideoRenderer* renderer);
24static void GBVideoSoftwareRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels);
25static void GBVideoSoftwareRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels);
26
27static void GBVideoSoftwareRendererDrawBackground(struct GBVideoSoftwareRenderer* renderer, uint8_t* maps, int startX, int endX, int sx, int sy);
28static void GBVideoSoftwareRendererDrawObj(struct GBVideoSoftwareRenderer* renderer, struct GBObj* obj, int startX, int endX, int y);
29
30static void _clearScreen(struct GBVideoSoftwareRenderer* renderer) {
31 size_t sgbOffset = 0;
32 if (renderer->model == GB_MODEL_SGB) {
33 return;
34 }
35 int y;
36 for (y = 0; y < GB_VIDEO_VERTICAL_PIXELS; ++y) {
37 color_t* row = &renderer->outputBuffer[renderer->outputBufferStride * y + sgbOffset];
38 int x;
39 for (x = 0; x < GB_VIDEO_HORIZONTAL_PIXELS; x += 4) {
40 row[x + 0] = renderer->palette[0];
41 row[x + 1] = renderer->palette[0];
42 row[x + 2] = renderer->palette[0];
43 row[x + 3] = renderer->palette[0];
44 }
45 }
46}
47
48static void _regenerateSGBBorder(struct GBVideoSoftwareRenderer* renderer) {
49 int i;
50 for (i = 0; i < 0x40; ++i) {
51 uint16_t color;
52 LOAD_16LE(color, 0x800 + i * 2, renderer->d.sgbMapRam);
53 renderer->d.writePalette(&renderer->d, i + 0x40, color);
54 }
55 int x, y;
56 for (y = 0; y < 224; ++y) {
57 for (x = 0; x < 256; x += 8) {
58 if (x >= 48 && x < 208 && y >= 40 && y < 104) {
59 continue;
60 }
61 uint16_t mapData;
62 LOAD_16LE(mapData, (x >> 2) + (y & ~7) * 8, renderer->d.sgbMapRam);
63 if (UNLIKELY(SGBBgAttributesGetTile(mapData) >= 0x100)) {
64 continue;
65 }
66
67 int localY = y & 0x7;
68 if (SGBBgAttributesIsYFlip(mapData)) {
69 localY = 7 - localY;
70 }
71 uint8_t tileData[4];
72 tileData[0] = renderer->d.sgbCharRam[(SGBBgAttributesGetTile(mapData) * 16 + localY) * 2 + 0x00];
73 tileData[1] = renderer->d.sgbCharRam[(SGBBgAttributesGetTile(mapData) * 16 + localY) * 2 + 0x01];
74 tileData[2] = renderer->d.sgbCharRam[(SGBBgAttributesGetTile(mapData) * 16 + localY) * 2 + 0x10];
75 tileData[3] = renderer->d.sgbCharRam[(SGBBgAttributesGetTile(mapData) * 16 + localY) * 2 + 0x11];
76
77 size_t base = y * renderer->outputBufferStride + x;
78 int paletteBase = SGBBgAttributesGetPalette(mapData) * 0x10;
79 int colorSelector;
80
81 if (SGBBgAttributesIsXFlip(mapData)) {
82 for (i = 0; i < 8; ++i) {
83 colorSelector = (tileData[0] >> i & 0x1) << 0 | (tileData[1] >> i & 0x1) << 1 | (tileData[2] >> i & 0x1) << 2 | (tileData[3] >> i & 0x1) << 3;
84 renderer->outputBuffer[base + i] = renderer->palette[paletteBase | colorSelector];
85 }
86 } else {
87 for (i = 7; i >= 0; --i) {
88 colorSelector = (tileData[0] >> i & 0x1) << 0 | (tileData[1] >> i & 0x1) << 1 | (tileData[2] >> i & 0x1) << 2 | (tileData[3] >> i & 0x1) << 3;
89 renderer->outputBuffer[base + 7 - i] = renderer->palette[paletteBase | colorSelector];
90 }
91 }
92 }
93 }
94}
95
96static inline void _setAttribute(uint8_t* sgbAttributes, unsigned x, unsigned y, int palette) {
97 int p = sgbAttributes[(x >> 2) + 5 * y];
98 p &= ~(3 << (2 * (3 - (x & 3))));
99 p |= palette << (2 * (3 - (x & 3)));
100 sgbAttributes[(x >> 2) + 5 * y] = p;
101}
102
103static void _parseAttrBlock(struct GBVideoSoftwareRenderer* renderer, int start) {
104 uint8_t block[6];
105 memcpy(block, &renderer->sgbPacket[start], 6);
106 unsigned x0 = block[2];
107 unsigned x1 = block[4];
108 unsigned y0 = block[3];
109 unsigned y1 = block[5];
110 unsigned x, y;
111 int pIn = block[1] & 3;
112 int pPerim = (block[1] >> 2) & 3;
113 int pOut = (block[1] >> 4) & 3;
114
115 for (y = 0; y < GB_VIDEO_VERTICAL_PIXELS / 8; ++y) {
116 for (x = 0; x < GB_VIDEO_HORIZONTAL_PIXELS / 8; ++x) {
117 if (y > y0 && y < y1 && x > x0 && x < x1) {
118 if (block[0] & 1) {
119 _setAttribute(renderer->d.sgbAttributes, x, y, pIn);
120 }
121 } else if (y < y0 || y > y1 || x < x0 || x > x1) {
122 if (block[0] & 4) {
123 _setAttribute(renderer->d.sgbAttributes, x, y, pOut);
124 }
125 } else {
126 if (block[0] & 2) {
127 _setAttribute(renderer->d.sgbAttributes, x, y, pPerim);
128 } else if (block[0] & 1) {
129 _setAttribute(renderer->d.sgbAttributes, x, y, pIn);
130 } else if (block[0] & 4) {
131 _setAttribute(renderer->d.sgbAttributes, x, y, pOut);
132 }
133 }
134 }
135 }
136}
137
138static void _parseAttrLine(struct GBVideoSoftwareRenderer* renderer, int start) {
139 uint8_t byte = renderer->sgbPacket[start];
140 unsigned line = byte & 0x1F;
141 int pal = (byte >> 5) & 3;
142
143 if (byte & 0x80) {
144 if (line > GB_VIDEO_VERTICAL_PIXELS / 8) {
145 return;
146 }
147 int x;
148 for (x = 0; x < GB_VIDEO_HORIZONTAL_PIXELS / 8; ++x) {
149 _setAttribute(renderer->d.sgbAttributes, x, line, pal);
150 }
151 } else {
152 if (line > GB_VIDEO_HORIZONTAL_PIXELS / 8) {
153 return;
154 }
155 int y;
156 for (y = 0; y < GB_VIDEO_VERTICAL_PIXELS / 8; ++y) {
157 _setAttribute(renderer->d.sgbAttributes, line, y, pal);
158 }
159 }
160}
161
162static bool _inWindow(struct GBVideoSoftwareRenderer* renderer) {
163 return GBRegisterLCDCIsWindow(renderer->lcdc) && GB_VIDEO_HORIZONTAL_PIXELS + 7 > renderer->wx;
164}
165
166void GBVideoSoftwareRendererCreate(struct GBVideoSoftwareRenderer* renderer) {
167 renderer->d.init = GBVideoSoftwareRendererInit;
168 renderer->d.deinit = GBVideoSoftwareRendererDeinit;
169 renderer->d.writeVideoRegister = GBVideoSoftwareRendererWriteVideoRegister;
170 renderer->d.writeSGBPacket = GBVideoSoftwareRendererWriteSGBPacket;
171 renderer->d.writePalette = GBVideoSoftwareRendererWritePalette;
172 renderer->d.writeVRAM = GBVideoSoftwareRendererWriteVRAM;
173 renderer->d.writeOAM = GBVideoSoftwareRendererWriteOAM;
174 renderer->d.drawRange = GBVideoSoftwareRendererDrawRange;
175 renderer->d.finishScanline = GBVideoSoftwareRendererFinishScanline;
176 renderer->d.finishFrame = GBVideoSoftwareRendererFinishFrame;
177 renderer->d.getPixels = GBVideoSoftwareRendererGetPixels;
178 renderer->d.putPixels = GBVideoSoftwareRendererPutPixels;
179
180 renderer->d.disableBG = false;
181 renderer->d.disableOBJ = false;
182 renderer->d.disableWIN = false;
183
184 renderer->temporaryBuffer = 0;
185}
186
187static void GBVideoSoftwareRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool sgbBorders) {
188 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
189 softwareRenderer->lcdc = 0;
190 softwareRenderer->scy = 0;
191 softwareRenderer->scx = 0;
192 softwareRenderer->wy = 0;
193 softwareRenderer->currentWy = 0;
194 softwareRenderer->lastY = 0;
195 softwareRenderer->hasWindow = false;
196 softwareRenderer->wx = 0;
197 softwareRenderer->model = model;
198 softwareRenderer->sgbTransfer = 0;
199 softwareRenderer->sgbCommandHeader = 0;
200 softwareRenderer->sgbBorders = sgbBorders;
201 softwareRenderer->objOffsetX = 0;
202 softwareRenderer->objOffsetY = 0;
203 softwareRenderer->offsetScx = 0;
204 softwareRenderer->offsetScy = 0;
205 softwareRenderer->offsetWx = 0;
206 softwareRenderer->offsetWy = 0;
207
208 int i;
209 for (i = 0; i < 64; ++i) {
210 softwareRenderer->lookup[i] = i;
211 softwareRenderer->lookup[i] = i;
212 softwareRenderer->lookup[i] = i;
213 softwareRenderer->lookup[i] = i;
214 }
215}
216
217static void GBVideoSoftwareRendererDeinit(struct GBVideoRenderer* renderer) {
218 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
219 UNUSED(softwareRenderer);
220}
221
222static void GBVideoSoftwareRendererUpdateWindow(struct GBVideoSoftwareRenderer* renderer, bool before, bool after) {
223 if (renderer->lastY >= GB_VIDEO_VERTICAL_PIXELS || after == before) {
224 return;
225 }
226 if (renderer->lastY >= renderer->wy) {
227 if (!after) {
228 renderer->currentWy -= renderer->lastY;
229 renderer->hasWindow = true;
230 } else {
231 if (!renderer->hasWindow) {
232 renderer->currentWy = renderer->lastY - renderer->wy;
233 } else {
234 renderer->currentWy += renderer->lastY;
235 }
236 }
237 }
238}
239
240static uint8_t GBVideoSoftwareRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value) {
241 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
242 if (renderer->cache) {
243 GBVideoCacheWriteVideoRegister(renderer->cache, address, value);
244 }
245 bool wasWindow = _inWindow(softwareRenderer);
246 switch (address) {
247 case REG_LCDC:
248 softwareRenderer->lcdc = value;
249 GBVideoSoftwareRendererUpdateWindow(softwareRenderer, wasWindow, _inWindow(softwareRenderer));
250 break;
251 case REG_SCY:
252 softwareRenderer->scy = value;
253 break;
254 case REG_SCX:
255 softwareRenderer->scx = value;
256 break;
257 case REG_WY:
258 softwareRenderer->wy = value;
259 GBVideoSoftwareRendererUpdateWindow(softwareRenderer, wasWindow, _inWindow(softwareRenderer));
260 break;
261 case REG_WX:
262 softwareRenderer->wx = value;
263 GBVideoSoftwareRendererUpdateWindow(softwareRenderer, wasWindow, _inWindow(softwareRenderer));
264 break;
265 case REG_BGP:
266 softwareRenderer->lookup[0] = value & 3;
267 softwareRenderer->lookup[1] = (value >> 2) & 3;
268 softwareRenderer->lookup[2] = (value >> 4) & 3;
269 softwareRenderer->lookup[3] = (value >> 6) & 3;
270 break;
271 case REG_OBP0:
272 softwareRenderer->lookup[0x20 + 0] = value & 3;
273 softwareRenderer->lookup[0x20 + 1] = (value >> 2) & 3;
274 softwareRenderer->lookup[0x20 + 2] = (value >> 4) & 3;
275 softwareRenderer->lookup[0x20 + 3] = (value >> 6) & 3;
276 break;
277 case REG_OBP1:
278 softwareRenderer->lookup[0x24 + 0] = value & 3;
279 softwareRenderer->lookup[0x24 + 1] = (value >> 2) & 3;
280 softwareRenderer->lookup[0x24 + 2] = (value >> 4) & 3;
281 softwareRenderer->lookup[0x24 + 3] = (value >> 6) & 3;
282 break;
283 }
284 return value;
285}
286
287static void GBVideoSoftwareRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data) {
288 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
289 memcpy(softwareRenderer->sgbPacket, data, sizeof(softwareRenderer->sgbPacket));
290 int i;
291 softwareRenderer->sgbCommandHeader = data[0];
292 softwareRenderer->sgbTransfer = 0;
293 int set;
294 int sets;
295 int attrX;
296 int attrY;
297 int attrDirection;
298 int pBefore;
299 int pAfter;
300 int pDiv;
301 switch (softwareRenderer->sgbCommandHeader >> 3) {
302 case SGB_PAL_SET:
303 softwareRenderer->sgbPacket[1] = data[9];
304 if (!(data[9] & 0x80)) {
305 break;
306 }
307 // Fall through
308 case SGB_ATTR_SET:
309 set = softwareRenderer->sgbPacket[1] & 0x3F;
310 if (set <= 0x2C) {
311 memcpy(renderer->sgbAttributes, &renderer->sgbAttributeFiles[set * 90], 90);
312 }
313 break;
314 case SGB_ATTR_BLK:
315 sets = softwareRenderer->sgbPacket[1];
316 i = 2;
317 for (; i < (softwareRenderer->sgbCommandHeader & 7) << 4 && sets; i += 6, --sets) {
318 _parseAttrBlock(softwareRenderer, i);
319 }
320 break;
321 case SGB_ATTR_LIN:
322 sets = softwareRenderer->sgbPacket[1];
323 i = 2;
324 for (; i < (softwareRenderer->sgbCommandHeader & 7) << 4 && sets; ++i, --sets) {
325 _parseAttrLine(softwareRenderer, i);
326 }
327 break;
328 case SGB_ATTR_DIV:
329 pAfter = softwareRenderer->sgbPacket[1] & 3;
330 pBefore = (softwareRenderer->sgbPacket[1] >> 2) & 3;
331 pDiv = (softwareRenderer->sgbPacket[1] >> 4) & 3;
332 attrX = softwareRenderer->sgbPacket[2];
333 if (softwareRenderer->sgbPacket[1] & 0x40) {
334 if (attrX > GB_VIDEO_VERTICAL_PIXELS / 8) {
335 attrX = GB_VIDEO_VERTICAL_PIXELS / 8;
336 }
337 int j;
338 for (j = 0; j < attrX; ++j) {
339 for (i = 0; i < GB_VIDEO_HORIZONTAL_PIXELS / 8; ++i) {
340 _setAttribute(renderer->sgbAttributes, i, j, pBefore);
341 }
342 }
343 if (attrX < GB_VIDEO_VERTICAL_PIXELS / 8) {
344 for (i = 0; i < GB_VIDEO_HORIZONTAL_PIXELS / 8; ++i) {
345 _setAttribute(renderer->sgbAttributes, i, attrX, pDiv);
346 }
347
348 }
349 for (; j < GB_VIDEO_VERTICAL_PIXELS / 8; ++j) {
350 for (i = 0; i < GB_VIDEO_HORIZONTAL_PIXELS / 8; ++i) {
351 _setAttribute(renderer->sgbAttributes, i, j, pAfter);
352 }
353 }
354 } else {
355 if (attrX > GB_VIDEO_HORIZONTAL_PIXELS / 8) {
356 attrX = GB_VIDEO_HORIZONTAL_PIXELS / 8;
357 }
358 int j;
359 for (j = 0; j < attrX; ++j) {
360 for (i = 0; i < GB_VIDEO_HORIZONTAL_PIXELS / 8; ++i) {
361 _setAttribute(renderer->sgbAttributes, j, i, pBefore);
362 }
363 }
364 if (attrX < GB_VIDEO_HORIZONTAL_PIXELS / 8) {
365 for (i = 0; i < GB_VIDEO_VERTICAL_PIXELS / 8; ++i) {
366 _setAttribute(renderer->sgbAttributes, attrX, i, pDiv);
367 }
368
369 }
370 for (; j < GB_VIDEO_HORIZONTAL_PIXELS / 8; ++j) {
371 for (i = 0; i < GB_VIDEO_VERTICAL_PIXELS / 8; ++i) {
372 _setAttribute(renderer->sgbAttributes, j, i, pAfter);
373 }
374 }
375 }
376 break;
377 case SGB_ATTR_CHR:
378 attrX = softwareRenderer->sgbPacket[1];
379 attrY = softwareRenderer->sgbPacket[2];
380 if (attrX >= GB_VIDEO_HORIZONTAL_PIXELS / 8) {
381 attrX = 0;
382 }
383 if (attrY >= GB_VIDEO_VERTICAL_PIXELS / 8) {
384 attrY = 0;
385 }
386 sets = softwareRenderer->sgbPacket[3];
387 sets |= softwareRenderer->sgbPacket[4] << 8;
388 attrDirection = softwareRenderer->sgbPacket[5];
389 i = 6;
390 for (; i < (softwareRenderer->sgbCommandHeader & 7) << 4 && sets; ++i) {
391 int j;
392 for (j = 0; j < 4 && sets; ++j, --sets) {
393 uint8_t p = softwareRenderer->sgbPacket[i] >> (6 - j * 2);
394 _setAttribute(renderer->sgbAttributes, attrX, attrY, p & 3);
395 if (attrDirection) {
396 ++attrY;
397 if (attrY >= GB_VIDEO_VERTICAL_PIXELS / 8) {
398 attrY = 0;
399 ++attrX;
400 }
401 if (attrX >= GB_VIDEO_HORIZONTAL_PIXELS / 8) {
402 attrX = 0;
403 }
404 } else {
405 ++attrX;
406 if (attrX >= GB_VIDEO_HORIZONTAL_PIXELS / 8) {
407 attrX = 0;
408 ++attrY;
409 }
410 if (attrY >= GB_VIDEO_VERTICAL_PIXELS / 8) {
411 attrY = 0;
412 }
413 }
414 }
415 }
416
417 break;
418 case SGB_ATRC_EN:
419 case SGB_MASK_EN:
420 if (softwareRenderer->sgbBorders && !renderer->sgbRenderMode) {
421 _regenerateSGBBorder(softwareRenderer);
422 }
423 }
424}
425
426static void GBVideoSoftwareRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value) {
427 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
428 color_t color = mColorFrom555(value);
429 if (softwareRenderer->model == GB_MODEL_SGB) {
430 if (index < 0x10 && index && !(index & 3)) {
431 color = softwareRenderer->palette[0];
432 } else if (index >= 0x40 && !(index & 0xF)) {
433 color = softwareRenderer->palette[0];
434 }
435 }
436 softwareRenderer->palette[index] = color;
437 if (renderer->cache) {
438 mCacheSetWritePalette(renderer->cache, index, color);
439 }
440
441 if (softwareRenderer->model == GB_MODEL_SGB && !index && GBRegisterLCDCIsEnable(softwareRenderer->lcdc)) {
442 renderer->writePalette(renderer, 0x04, value);
443 renderer->writePalette(renderer, 0x08, value);
444 renderer->writePalette(renderer, 0x0C, value);
445 renderer->writePalette(renderer, 0x40, value);
446 renderer->writePalette(renderer, 0x50, value);
447 renderer->writePalette(renderer, 0x60, value);
448 renderer->writePalette(renderer, 0x70, value);
449 if (softwareRenderer->sgbBorders && !renderer->sgbRenderMode) {
450 _regenerateSGBBorder(softwareRenderer);
451 }
452 }
453}
454
455static void GBVideoSoftwareRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address) {
456 if (renderer->cache) {
457 mCacheSetWriteVRAM(renderer->cache, address);
458 }
459}
460
461static void GBVideoSoftwareRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam) {
462 UNUSED(renderer);
463 UNUSED(oam);
464 // Nothing to do
465}
466
467static void GBVideoSoftwareRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax) {
468 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
469 softwareRenderer->lastY = y;
470 uint8_t* maps = &softwareRenderer->d.vram[GB_BASE_MAP];
471 if (GBRegisterLCDCIsTileMap(softwareRenderer->lcdc)) {
472 maps += GB_SIZE_MAP;
473 }
474 if (softwareRenderer->d.disableBG) {
475 memset(&softwareRenderer->row[startX], 0, endX - startX);
476 }
477 if (GBRegisterLCDCIsBgEnable(softwareRenderer->lcdc) || softwareRenderer->model >= GB_MODEL_CGB) {
478 int wy = softwareRenderer->wy + softwareRenderer->currentWy;
479 if (GBRegisterLCDCIsWindow(softwareRenderer->lcdc) && wy <= y && endX >= softwareRenderer->wx - 7) {
480 if (softwareRenderer->wx - 7 > 0 && !softwareRenderer->d.disableBG) {
481 GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, startX, softwareRenderer->wx - 7, softwareRenderer->scx - softwareRenderer->offsetScx, softwareRenderer->scy + y - softwareRenderer->offsetScy);
482 }
483
484 maps = &softwareRenderer->d.vram[GB_BASE_MAP];
485 if (GBRegisterLCDCIsWindowTileMap(softwareRenderer->lcdc)) {
486 maps += GB_SIZE_MAP;
487 }
488 if (!softwareRenderer->d.disableWIN) {
489 GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, softwareRenderer->wx - 7, endX, 7 - softwareRenderer->wx - softwareRenderer->offsetWx, y - wy - softwareRenderer->offsetWy);
490 }
491 } else if (!softwareRenderer->d.disableBG) {
492 GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, startX, endX, softwareRenderer->scx - softwareRenderer->offsetScx, softwareRenderer->scy + y - softwareRenderer->offsetScy);
493 }
494 } else if (!softwareRenderer->d.disableBG) {
495 memset(&softwareRenderer->row[startX], 0, endX - startX);
496 }
497
498 if (GBRegisterLCDCIsObjEnable(softwareRenderer->lcdc) && !softwareRenderer->d.disableOBJ) {
499 size_t i;
500 for (i = 0; i < oamMax; ++i) {
501 GBVideoSoftwareRendererDrawObj(softwareRenderer, &obj[i], startX, endX, y);
502 }
503 }
504
505 size_t sgbOffset = 0;
506 if (softwareRenderer->model == GB_MODEL_SGB && softwareRenderer->sgbBorders) {
507 sgbOffset = softwareRenderer->outputBufferStride * 40 + 48;
508 }
509 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y + sgbOffset];
510 int x = startX;
511 int p = 0;
512 switch (softwareRenderer->d.sgbRenderMode) {
513 case 0:
514 if (softwareRenderer->model == GB_MODEL_SGB) {
515 p = softwareRenderer->d.sgbAttributes[(startX >> 5) + 5 * (y >> 3)];
516 p >>= 6 - ((x / 4) & 0x6);
517 p &= 3;
518 p <<= 2;
519 }
520 for (; x < ((startX + 7) & ~7) && x < endX; ++x) {
521 row[x] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x] & 0x7F]];
522 }
523 for (; x + 7 < (endX & ~7); x += 8) {
524 if (softwareRenderer->model == GB_MODEL_SGB) {
525 p = softwareRenderer->d.sgbAttributes[(x >> 5) + 5 * (y >> 3)];
526 p >>= 6 - ((x / 4) & 0x6);
527 p &= 3;
528 p <<= 2;
529 }
530 row[x + 0] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x] & 0x7F]];
531 row[x + 1] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 1] & 0x7F]];
532 row[x + 2] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 2] & 0x7F]];
533 row[x + 3] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 3] & 0x7F]];
534 row[x + 4] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 4] & 0x7F]];
535 row[x + 5] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 5] & 0x7F]];
536 row[x + 6] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 6] & 0x7F]];
537 row[x + 7] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 7] & 0x7F]];
538 }
539 if (softwareRenderer->model == GB_MODEL_SGB) {
540 p = softwareRenderer->d.sgbAttributes[(x >> 5) + 5 * (y >> 3)];
541 p >>= 6 - ((x / 4) & 0x6);
542 p &= 3;
543 p <<= 2;
544 }
545 for (; x < endX; ++x) {
546 row[x] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x] & 0x7F]];
547 }
548 break;
549 case 1:
550 break;
551 case 2:
552 for (; x < ((startX + 7) & ~7) && x < endX; ++x) {
553 row[x] = 0;
554 }
555 for (; x + 7 < (endX & ~7); x += 8) {
556 row[x] = 0;
557 row[x + 1] = 0;
558 row[x + 2] = 0;
559 row[x + 3] = 0;
560 row[x + 4] = 0;
561 row[x + 5] = 0;
562 row[x + 6] = 0;
563 row[x + 7] = 0;
564 }
565 for (; x < endX; ++x) {
566 row[x] = 0;
567 }
568 break;
569 case 3:
570 for (; x < ((startX + 7) & ~7) && x < endX; ++x) {
571 row[x] = softwareRenderer->palette[0];
572 }
573 for (; x + 7 < (endX & ~7); x += 8) {
574 row[x] = softwareRenderer->palette[0];
575 row[x + 1] = softwareRenderer->palette[0];
576 row[x + 2] = softwareRenderer->palette[0];
577 row[x + 3] = softwareRenderer->palette[0];
578 row[x + 4] = softwareRenderer->palette[0];
579 row[x + 5] = softwareRenderer->palette[0];
580 row[x + 6] = softwareRenderer->palette[0];
581 row[x + 7] = softwareRenderer->palette[0];
582 }
583 for (; x < endX; ++x) {
584 row[x] = softwareRenderer->palette[0];
585 }
586 break;
587 }
588}
589
590static void GBVideoSoftwareRendererFinishScanline(struct GBVideoRenderer* renderer, int y) {
591 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
592
593 if (softwareRenderer->sgbTransfer == 1) {
594 size_t offset = 2 * ((y & 7) + (y >> 3) * GB_VIDEO_HORIZONTAL_PIXELS);
595 if (offset >= 0x1000) {
596 return;
597 }
598 uint8_t* buffer = NULL;
599 switch (softwareRenderer->sgbCommandHeader >> 3) {
600 case SGB_PAL_TRN:
601 buffer = renderer->sgbPalRam;
602 break;
603 case SGB_CHR_TRN:
604 buffer = &renderer->sgbCharRam[SGB_SIZE_CHAR_RAM / 2 * (softwareRenderer->sgbPacket[1] & 1)];
605 break;
606 case SGB_PCT_TRN:
607 buffer = renderer->sgbMapRam;
608 break;
609 case SGB_ATTR_TRN:
610 buffer = renderer->sgbAttributeFiles;
611 break;
612 default:
613 break;
614 }
615 if (buffer) {
616 int i;
617 for (i = 0; i < GB_VIDEO_HORIZONTAL_PIXELS; i += 8) {
618 if (UNLIKELY(offset + (i << 1) + 1 >= 0x1000)) {
619 break;
620 }
621 uint8_t hi = 0;
622 uint8_t lo = 0;
623 hi |= (softwareRenderer->row[i + 0] & 0x2) << 6;
624 lo |= (softwareRenderer->row[i + 0] & 0x1) << 7;
625 hi |= (softwareRenderer->row[i + 1] & 0x2) << 5;
626 lo |= (softwareRenderer->row[i + 1] & 0x1) << 6;
627 hi |= (softwareRenderer->row[i + 2] & 0x2) << 4;
628 lo |= (softwareRenderer->row[i + 2] & 0x1) << 5;
629 hi |= (softwareRenderer->row[i + 3] & 0x2) << 3;
630 lo |= (softwareRenderer->row[i + 3] & 0x1) << 4;
631 hi |= (softwareRenderer->row[i + 4] & 0x2) << 2;
632 lo |= (softwareRenderer->row[i + 4] & 0x1) << 3;
633 hi |= (softwareRenderer->row[i + 5] & 0x2) << 1;
634 lo |= (softwareRenderer->row[i + 5] & 0x1) << 2;
635 hi |= (softwareRenderer->row[i + 6] & 0x2) << 0;
636 lo |= (softwareRenderer->row[i + 6] & 0x1) << 1;
637 hi |= (softwareRenderer->row[i + 7] & 0x2) >> 1;
638 lo |= (softwareRenderer->row[i + 7] & 0x1) >> 0;
639 buffer[offset + (i << 1) + 0] = lo;
640 buffer[offset + (i << 1) + 1] = hi;
641 }
642 }
643 }
644}
645
646static void GBVideoSoftwareRendererFinishFrame(struct GBVideoRenderer* renderer) {
647 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
648
649 if (softwareRenderer->temporaryBuffer) {
650 mappedMemoryFree(softwareRenderer->temporaryBuffer, GB_VIDEO_HORIZONTAL_PIXELS * GB_VIDEO_VERTICAL_PIXELS * 4);
651 softwareRenderer->temporaryBuffer = 0;
652 }
653 if (!GBRegisterLCDCIsEnable(softwareRenderer->lcdc)) {
654 _clearScreen(softwareRenderer);
655 }
656 if (softwareRenderer->model == GB_MODEL_SGB) {
657 switch (softwareRenderer->sgbCommandHeader >> 3) {
658 case SGB_PAL_SET:
659 case SGB_ATTR_SET:
660 if (softwareRenderer->sgbPacket[1] & 0x40) {
661 renderer->sgbRenderMode = 0;
662 }
663 break;
664 case SGB_PAL_TRN:
665 case SGB_CHR_TRN:
666 case SGB_PCT_TRN:
667 if (softwareRenderer->sgbTransfer > 0 && softwareRenderer->sgbBorders && !renderer->sgbRenderMode) {
668 // Make sure every buffer sees this if we're multibuffering
669 _regenerateSGBBorder(softwareRenderer);
670 }
671 // Fall through
672 case SGB_ATTR_TRN:
673 ++softwareRenderer->sgbTransfer;
674 if (softwareRenderer->sgbTransfer == 5) {
675 softwareRenderer->sgbCommandHeader = 0;
676 }
677 break;
678 default:
679 break;
680 }
681 }
682 softwareRenderer->lastY = GB_VIDEO_VERTICAL_PIXELS;
683 softwareRenderer->currentWy = 0;
684 softwareRenderer->hasWindow = false;
685}
686
687static void GBVideoSoftwareRendererDrawBackground(struct GBVideoSoftwareRenderer* renderer, uint8_t* maps, int startX, int endX, int sx, int sy) {
688 uint8_t* data = renderer->d.vram;
689 uint8_t* attr = &maps[GB_SIZE_VRAM_BANK0];
690 if (!GBRegisterLCDCIsTileData(renderer->lcdc)) {
691 data += 0x1000;
692 }
693 int topY = ((sy >> 3) & 0x1F) * 0x20;
694 int bottomY = sy & 7;
695 if (startX < 0) {
696 startX = 0;
697 }
698 int x;
699 if ((startX + sx) & 7) {
700 int startX2 = startX + 8 - ((startX + sx) & 7);
701 for (x = startX; x < startX2; ++x) {
702 uint8_t* localData = data;
703 int localY = bottomY;
704 int topX = ((x + sx) >> 3) & 0x1F;
705 int bottomX = 7 - ((x + sx) & 7);
706 int bgTile;
707 if (GBRegisterLCDCIsTileData(renderer->lcdc)) {
708 bgTile = maps[topX + topY];
709 } else {
710 bgTile = ((int8_t*) maps)[topX + topY];
711 }
712 int p = 0;
713 if (renderer->model >= GB_MODEL_CGB) {
714 GBObjAttributes attrs = attr[topX + topY];
715 p = GBObjAttributesGetCGBPalette(attrs) * 4;
716 if (GBObjAttributesIsPriority(attrs) && GBRegisterLCDCIsBgEnable(renderer->lcdc)) {
717 p |= 0x80;
718 }
719 if (GBObjAttributesIsBank(attrs)) {
720 localData += GB_SIZE_VRAM_BANK0;
721 }
722 if (GBObjAttributesIsYFlip(attrs)) {
723 localY = 7 - bottomY;
724 }
725 if (GBObjAttributesIsXFlip(attrs)) {
726 bottomX = 7 - bottomX;
727 }
728 }
729 uint8_t tileDataLower = localData[(bgTile * 8 + localY) * 2];
730 uint8_t tileDataUpper = localData[(bgTile * 8 + localY) * 2 + 1];
731 tileDataUpper >>= bottomX;
732 tileDataLower >>= bottomX;
733 renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
734 }
735 startX = startX2;
736 }
737 for (x = startX; x < endX; x += 8) {
738 uint8_t* localData = data;
739 int localY = bottomY;
740 int topX = ((x + sx) >> 3) & 0x1F;
741 int bgTile;
742 if (GBRegisterLCDCIsTileData(renderer->lcdc)) {
743 bgTile = maps[topX + topY];
744 } else {
745 bgTile = ((int8_t*) maps)[topX + topY];
746 }
747 int p = 0;
748 if (renderer->model >= GB_MODEL_CGB) {
749 GBObjAttributes attrs = attr[topX + topY];
750 p = GBObjAttributesGetCGBPalette(attrs) * 4;
751 if (GBObjAttributesIsPriority(attrs) && GBRegisterLCDCIsBgEnable(renderer->lcdc)) {
752 p |= 0x80;
753 }
754 if (GBObjAttributesIsBank(attrs)) {
755 localData += GB_SIZE_VRAM_BANK0;
756 }
757 if (GBObjAttributesIsYFlip(attrs)) {
758 localY = 7 - bottomY;
759 }
760 if (GBObjAttributesIsXFlip(attrs)) {
761 uint8_t tileDataLower = localData[(bgTile * 8 + localY) * 2];
762 uint8_t tileDataUpper = localData[(bgTile * 8 + localY) * 2 + 1];
763 renderer->row[x + 0] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
764 renderer->row[x + 1] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
765 renderer->row[x + 2] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
766 renderer->row[x + 3] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
767 renderer->row[x + 4] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
768 renderer->row[x + 5] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
769 renderer->row[x + 6] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
770 renderer->row[x + 7] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
771 continue;
772 }
773 }
774 uint8_t tileDataLower = localData[(bgTile * 8 + localY) * 2];
775 uint8_t tileDataUpper = localData[(bgTile * 8 + localY) * 2 + 1];
776 renderer->row[x + 7] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
777 renderer->row[x + 6] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
778 renderer->row[x + 5] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
779 renderer->row[x + 4] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
780 renderer->row[x + 3] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
781 renderer->row[x + 2] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
782 renderer->row[x + 1] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
783 renderer->row[x + 0] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
784 }
785}
786
787static void GBVideoSoftwareRendererDrawObj(struct GBVideoSoftwareRenderer* renderer, struct GBObj* obj, int startX, int endX, int y) {
788 int objX = obj->x + renderer->objOffsetX;
789 int ix = objX - 8;
790 if (endX < ix || startX >= ix + 8) {
791 return;
792 }
793 if (objX < endX) {
794 endX = objX;
795 }
796 if (objX - 8 > startX) {
797 startX = objX - 8;
798 }
799 if (startX < 0) {
800 startX = 0;
801 }
802 uint8_t* data = renderer->d.vram;
803 int tileOffset = 0;
804 int bottomY;
805 int objY = obj->y + renderer->objOffsetY;
806 if (GBObjAttributesIsYFlip(obj->attr)) {
807 bottomY = 7 - ((y - objY - 16) & 7);
808 if (GBRegisterLCDCIsObjSize(renderer->lcdc) && y - objY < -8) {
809 ++tileOffset;
810 }
811 } else {
812 bottomY = (y - objY - 16) & 7;
813 if (GBRegisterLCDCIsObjSize(renderer->lcdc) && y - objY >= -8) {
814 ++tileOffset;
815 }
816 }
817 if (GBRegisterLCDCIsObjSize(renderer->lcdc) && obj->tile & 1) {
818 --tileOffset;
819 }
820 uint8_t mask = GBObjAttributesIsPriority(obj->attr) ? 0x63 : 0x60;
821 uint8_t mask2 = GBObjAttributesIsPriority(obj->attr) ? 0 : 0x83;
822 int p;
823 if (renderer->model >= GB_MODEL_CGB) {
824 p = (GBObjAttributesGetCGBPalette(obj->attr) + 8) * 4;
825 if (GBObjAttributesIsBank(obj->attr)) {
826 data += GB_SIZE_VRAM_BANK0;
827 }
828 if (!GBRegisterLCDCIsBgEnable(renderer->lcdc)) {
829 mask = 0x60;
830 mask2 = 0x83;
831 }
832 } else {
833 p = (GBObjAttributesGetPalette(obj->attr) + 8) * 4;
834 }
835 int bottomX;
836 int x = startX;
837 if ((x - objX) & 7) {
838 for (; x < endX; ++x) {
839 if (GBObjAttributesIsXFlip(obj->attr)) {
840 bottomX = (x - objX) & 7;
841 } else {
842 bottomX = 7 - ((x - objX) & 7);
843 }
844 int objTile = obj->tile + tileOffset;
845 uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
846 uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
847 tileDataUpper >>= bottomX;
848 tileDataLower >>= bottomX;
849 color_t current = renderer->row[x];
850 if (((tileDataUpper | tileDataLower) & 1) && !(current & mask) && (current & mask2) <= 0x80) {
851 renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
852 }
853 }
854 } else if (GBObjAttributesIsXFlip(obj->attr)) {
855 int objTile = obj->tile + tileOffset;
856 uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
857 uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
858 color_t current;
859 current = renderer->row[x];
860 if (((tileDataUpper | tileDataLower) & 1) && !(current & mask) && (current & mask2) <= 0x80) {
861 renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
862 }
863 current = renderer->row[x + 1];
864 if (((tileDataUpper | tileDataLower) & 2) && !(current & mask) && (current & mask2) <= 0x80) {
865 renderer->row[x + 1] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
866 }
867 current = renderer->row[x + 2];
868 if (((tileDataUpper | tileDataLower) & 4) && !(current & mask) && (current & mask2) <= 0x80) {
869 renderer->row[x + 2] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
870 }
871 current = renderer->row[x + 3];
872 if (((tileDataUpper | tileDataLower) & 8) && !(current & mask) && (current & mask2) <= 0x80) {
873 renderer->row[x + 3] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
874 }
875 current = renderer->row[x + 4];
876 if (((tileDataUpper | tileDataLower) & 16) && !(current & mask) && (current & mask2) <= 0x80) {
877 renderer->row[x + 4] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
878 }
879 current = renderer->row[x + 5];
880 if (((tileDataUpper | tileDataLower) & 32) && !(current & mask) && (current & mask2) <= 0x80) {
881 renderer->row[x + 5] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
882 }
883 current = renderer->row[x + 6];
884 if (((tileDataUpper | tileDataLower) & 64) && !(current & mask) && (current & mask2) <= 0x80) {
885 renderer->row[x + 6] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
886 }
887 current = renderer->row[x + 7];
888 if (((tileDataUpper | tileDataLower) & 128) && !(current & mask) && (current & mask2) <= 0x80) {
889 renderer->row[x + 7] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
890 }
891 } else {
892 int objTile = obj->tile + tileOffset;
893 uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
894 uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
895 color_t current;
896 current = renderer->row[x + 7];
897 if (((tileDataUpper | tileDataLower) & 1) && !(current & mask) && (current & mask2) <= 0x80) {
898 renderer->row[x + 7] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
899 }
900 current = renderer->row[x + 6];
901 if (((tileDataUpper | tileDataLower) & 2) && !(current & mask) && (current & mask2) <= 0x80) {
902 renderer->row[x + 6] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
903 }
904 current = renderer->row[x + 5];
905 if (((tileDataUpper | tileDataLower) & 4) && !(current & mask) && (current & mask2) <= 0x80) {
906 renderer->row[x + 5] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
907 }
908 current = renderer->row[x + 4];
909 if (((tileDataUpper | tileDataLower) & 8) && !(current & mask) && (current & mask2) <= 0x80) {
910 renderer->row[x + 4] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
911 }
912 current = renderer->row[x + 3];
913 if (((tileDataUpper | tileDataLower) & 16) && !(current & mask) && (current & mask2) <= 0x80) {
914 renderer->row[x + 3] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
915 }
916 current = renderer->row[x + 2];
917 if (((tileDataUpper | tileDataLower) & 32) && !(current & mask) && (current & mask2) <= 0x80) {
918 renderer->row[x + 2] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
919 }
920 current = renderer->row[x + 1];
921 if (((tileDataUpper | tileDataLower) & 64) && !(current & mask) && (current & mask2) <= 0x80) {
922 renderer->row[x + 1] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
923 }
924 current = renderer->row[x];
925 if (((tileDataUpper | tileDataLower) & 128) && !(current & mask) && (current & mask2) <= 0x80) {
926 renderer->row[x] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
927 }
928 }
929}
930
931static void GBVideoSoftwareRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels) {
932 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
933 *stride = softwareRenderer->outputBufferStride;
934 *pixels = softwareRenderer->outputBuffer;
935}
936
937static void GBVideoSoftwareRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels) {
938 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
939 // TODO: Share with GBAVideoSoftwareRendererGetPixels
940
941 const color_t* colorPixels = pixels;
942 unsigned i;
943 for (i = 0; i < GB_VIDEO_VERTICAL_PIXELS; ++i) {
944 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], GB_VIDEO_HORIZONTAL_PIXELS * BYTES_PER_PIXEL);
945 }
946}