all repos — mgba @ d9d299fb88efba1b15d11e0c0b42beb27564193f

mGBA Game Boy Advance Emulator

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 GBVideoSoftwareRendererEnableSGBBorder(struct GBVideoRenderer* renderer, bool enable);
  25static void GBVideoSoftwareRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels);
  26static void GBVideoSoftwareRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels);
  27
  28static void GBVideoSoftwareRendererDrawBackground(struct GBVideoSoftwareRenderer* renderer, uint8_t* maps, int startX, int endX, int sx, int sy);
  29static void GBVideoSoftwareRendererDrawObj(struct GBVideoSoftwareRenderer* renderer, struct GBObj* obj, int startX, int endX, int y);
  30
  31static void _clearScreen(struct GBVideoSoftwareRenderer* renderer) {
  32	size_t sgbOffset = 0;
  33	if (renderer->model & GB_MODEL_SGB) {
  34		return;
  35	}
  36	int y;
  37	for (y = 0; y < GB_VIDEO_VERTICAL_PIXELS; ++y) {
  38		color_t* row = &renderer->outputBuffer[renderer->outputBufferStride * y + sgbOffset];
  39		int x;
  40		for (x = 0; x < GB_VIDEO_HORIZONTAL_PIXELS; x += 4) {
  41			row[x + 0] = renderer->palette[0];
  42			row[x + 1] = renderer->palette[0];
  43			row[x + 2] = renderer->palette[0];
  44			row[x + 3] = renderer->palette[0];
  45		}
  46	}
  47}
  48
  49static void _regenerateSGBBorder(struct GBVideoSoftwareRenderer* renderer) {
  50	int i;
  51	for (i = 0; i < 0x40; ++i) {
  52		uint16_t color;
  53		LOAD_16LE(color, 0x800 + i * 2, renderer->d.sgbMapRam);
  54		renderer->d.writePalette(&renderer->d, i + 0x40, color);
  55	}
  56	int x, y;
  57	for (y = 0; y < 224; ++y) {
  58		for (x = 0; x < 256; x += 8) {
  59			if (x >= 48 && x < 208 && y >= 40 && y < 184) {
  60				continue;
  61			}
  62			uint16_t mapData;
  63			LOAD_16LE(mapData, (x >> 2) + (y & ~7) * 8, renderer->d.sgbMapRam);
  64			if (UNLIKELY(SGBBgAttributesGetTile(mapData) >= 0x100)) {
  65				continue;
  66			}
  67
  68			int localY = y & 0x7;
  69			if (SGBBgAttributesIsYFlip(mapData)) {
  70				localY = 7 - localY;
  71			}
  72			uint8_t tileData[4];
  73			tileData[0] = renderer->d.sgbCharRam[(SGBBgAttributesGetTile(mapData) * 16 + localY) * 2 + 0x00];
  74			tileData[1] = renderer->d.sgbCharRam[(SGBBgAttributesGetTile(mapData) * 16 + localY) * 2 + 0x01];
  75			tileData[2] = renderer->d.sgbCharRam[(SGBBgAttributesGetTile(mapData) * 16 + localY) * 2 + 0x10];
  76			tileData[3] = renderer->d.sgbCharRam[(SGBBgAttributesGetTile(mapData) * 16 + localY) * 2 + 0x11];
  77
  78			size_t base = y * renderer->outputBufferStride + x;
  79			int paletteBase = SGBBgAttributesGetPalette(mapData) * 0x10;
  80			int colorSelector;
  81
  82			int flip = 0;
  83			if (SGBBgAttributesIsXFlip(mapData)) {
  84				flip = 7;
  85			}
  86			for (i = 7; i >= 0; --i) {
  87				colorSelector = (tileData[0] >> i & 0x1) << 0 | (tileData[1] >> i & 0x1) << 1 | (tileData[2] >> i & 0x1) << 2 | (tileData[3] >> i & 0x1) << 3;
  88				renderer->outputBuffer[(base + 7 - i) ^ flip] = renderer->palette[paletteBase | colorSelector];
  89			}
  90		}
  91	}
  92}
  93
  94static inline void _setAttribute(uint8_t* sgbAttributes, unsigned x, unsigned y, int palette) {
  95	int p = sgbAttributes[(x >> 2) + 5 * y];
  96	p &= ~(3 << (2 * (3 - (x & 3))));
  97	p |= palette << (2 * (3 - (x & 3)));
  98	sgbAttributes[(x >> 2) + 5 * y] = p;
  99}
 100
 101static void _parseAttrBlock(struct GBVideoSoftwareRenderer* renderer, int start) {
 102	uint8_t block[6];
 103	memcpy(block, &renderer->sgbPacket[start], 6);
 104	unsigned x0 = block[2];
 105	unsigned x1 = block[4];
 106	unsigned y0 = block[3];
 107	unsigned y1 = block[5];
 108	unsigned x, y;
 109	int pIn = block[1] & 3;
 110	int pPerim = (block[1] >> 2) & 3;
 111	int pOut = (block[1] >> 4) & 3;
 112
 113	for (y = 0; y < GB_VIDEO_VERTICAL_PIXELS / 8; ++y) {
 114		for (x = 0; x < GB_VIDEO_HORIZONTAL_PIXELS / 8; ++x) {
 115			if (y > y0 && y < y1 && x > x0 && x < x1) {
 116				if (block[0] & 1) {
 117					_setAttribute(renderer->d.sgbAttributes, x, y, pIn);
 118				}
 119			} else if (y < y0 || y > y1 || x < x0 || x > x1) {
 120				if (block[0] & 4) {
 121					_setAttribute(renderer->d.sgbAttributes, x, y, pOut);
 122				}
 123			} else {
 124				if (block[0] & 2) {
 125					_setAttribute(renderer->d.sgbAttributes, x, y, pPerim);
 126				} else if (block[0] & 1) {
 127					_setAttribute(renderer->d.sgbAttributes, x, y, pIn);
 128				} else if (block[0] & 4) {
 129					_setAttribute(renderer->d.sgbAttributes, x, y, pOut);
 130				}
 131			}
 132		}
 133	}
 134}
 135
 136static void _parseAttrLine(struct GBVideoSoftwareRenderer* renderer, int start) {
 137	uint8_t byte = renderer->sgbPacket[start];
 138	unsigned line = byte & 0x1F;
 139	int pal = (byte >> 5) & 3;
 140
 141	if (byte & 0x80) {
 142		if (line > GB_VIDEO_VERTICAL_PIXELS / 8) {
 143			return;
 144		}
 145		int x;
 146		for (x = 0; x < GB_VIDEO_HORIZONTAL_PIXELS / 8; ++x) {
 147			_setAttribute(renderer->d.sgbAttributes, x, line, pal);
 148		}
 149	} else {
 150		if (line > GB_VIDEO_HORIZONTAL_PIXELS / 8) {
 151			return;
 152		}
 153		int y;
 154		for (y = 0; y < GB_VIDEO_VERTICAL_PIXELS / 8; ++y) {
 155			_setAttribute(renderer->d.sgbAttributes, line, y, pal);
 156		}
 157	}
 158}
 159
 160static bool _inWindow(struct GBVideoSoftwareRenderer* renderer) {
 161	return GBRegisterLCDCIsWindow(renderer->lcdc) && GB_VIDEO_HORIZONTAL_PIXELS + 7 > renderer->wx;
 162}
 163
 164void GBVideoSoftwareRendererCreate(struct GBVideoSoftwareRenderer* renderer) {
 165	renderer->d.init = GBVideoSoftwareRendererInit;
 166	renderer->d.deinit = GBVideoSoftwareRendererDeinit;
 167	renderer->d.writeVideoRegister = GBVideoSoftwareRendererWriteVideoRegister;
 168	renderer->d.writeSGBPacket = GBVideoSoftwareRendererWriteSGBPacket;
 169	renderer->d.writePalette = GBVideoSoftwareRendererWritePalette;
 170	renderer->d.writeVRAM = GBVideoSoftwareRendererWriteVRAM;
 171	renderer->d.writeOAM = GBVideoSoftwareRendererWriteOAM;
 172	renderer->d.drawRange = GBVideoSoftwareRendererDrawRange;
 173	renderer->d.finishScanline = GBVideoSoftwareRendererFinishScanline;
 174	renderer->d.finishFrame = GBVideoSoftwareRendererFinishFrame;
 175	renderer->d.enableSGBBorder = GBVideoSoftwareRendererEnableSGBBorder;
 176	renderer->d.getPixels = GBVideoSoftwareRendererGetPixels;
 177	renderer->d.putPixels = GBVideoSoftwareRendererPutPixels;
 178
 179	renderer->d.disableBG = false;
 180	renderer->d.disableOBJ = false;
 181	renderer->d.disableWIN = false;
 182
 183	renderer->temporaryBuffer = 0;
 184}
 185
 186static void GBVideoSoftwareRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool sgbBorders) {
 187	struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
 188	softwareRenderer->lcdc = 0;
 189	softwareRenderer->scy = 0;
 190	softwareRenderer->scx = 0;
 191	softwareRenderer->wy = 0;
 192	softwareRenderer->currentWy = 0;
 193	softwareRenderer->currentWx = 0;
 194	softwareRenderer->lastY = GB_VIDEO_VERTICAL_PIXELS;
 195	softwareRenderer->lastX = 0;
 196	softwareRenderer->hasWindow = false;
 197	softwareRenderer->wx = 0;
 198	softwareRenderer->model = model;
 199	softwareRenderer->sgbTransfer = 0;
 200	softwareRenderer->sgbCommandHeader = 0;
 201	softwareRenderer->sgbBorders = sgbBorders;
 202	softwareRenderer->objOffsetX = 0;
 203	softwareRenderer->objOffsetY = 0;
 204	softwareRenderer->offsetScx = 0;
 205	softwareRenderer->offsetScy = 0;
 206	softwareRenderer->offsetWx = 0;
 207	softwareRenderer->offsetWy = 0;
 208
 209	int i;
 210	for (i = 0; i < 64; ++i) {
 211		softwareRenderer->lookup[i] = i;
 212		softwareRenderer->lookup[i] = i;
 213		softwareRenderer->lookup[i] = i;
 214		softwareRenderer->lookup[i] = i;
 215	}
 216}
 217
 218static void GBVideoSoftwareRendererDeinit(struct GBVideoRenderer* renderer) {
 219	struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
 220	UNUSED(softwareRenderer);
 221}
 222
 223static void GBVideoSoftwareRendererUpdateWindow(struct GBVideoSoftwareRenderer* renderer, bool before, bool after, uint8_t oldWy) {
 224	if (renderer->lastY >= GB_VIDEO_VERTICAL_PIXELS || !(after || before)) {
 225		return;
 226	}
 227	if (!renderer->hasWindow && renderer->lastX == GB_VIDEO_HORIZONTAL_PIXELS) {
 228		return;
 229	}
 230	if (renderer->lastY >= oldWy) {
 231		if (!after) {
 232			renderer->currentWy -= renderer->lastY;
 233			renderer->hasWindow = true;
 234		} else if (!before) {
 235			if (!renderer->hasWindow) {
 236				renderer->currentWy = renderer->lastY - renderer->wy;
 237				if (renderer->lastY >= renderer->wy && renderer->lastX > renderer->wx) {
 238					++renderer->currentWy;
 239				}
 240			} else {
 241				renderer->currentWy += renderer->lastY;
 242			}
 243		} else if (renderer->wy != oldWy) {
 244			renderer->currentWy += oldWy - renderer->wy;
 245			renderer->hasWindow = true;
 246		}
 247	}
 248}
 249
 250static uint8_t GBVideoSoftwareRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value) {
 251	struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
 252	if (renderer->cache) {
 253		GBVideoCacheWriteVideoRegister(renderer->cache, address, value);
 254	}
 255	bool wasWindow = _inWindow(softwareRenderer);
 256	uint8_t wy = softwareRenderer->wy;
 257	switch (address) {
 258	case REG_LCDC:
 259		softwareRenderer->lcdc = value;
 260		GBVideoSoftwareRendererUpdateWindow(softwareRenderer, wasWindow, _inWindow(softwareRenderer), wy);
 261		break;
 262	case REG_SCY:
 263		softwareRenderer->scy = value;
 264		break;
 265	case REG_SCX:
 266		softwareRenderer->scx = value;
 267		break;
 268	case REG_WY:
 269		softwareRenderer->wy = value;
 270		GBVideoSoftwareRendererUpdateWindow(softwareRenderer, wasWindow, _inWindow(softwareRenderer), wy);
 271		break;
 272	case REG_WX:
 273		softwareRenderer->wx = value;
 274		GBVideoSoftwareRendererUpdateWindow(softwareRenderer, wasWindow, _inWindow(softwareRenderer), wy);
 275		break;
 276	case REG_BGP:
 277		softwareRenderer->lookup[0] = value & 3;
 278		softwareRenderer->lookup[1] = (value >> 2) & 3;
 279		softwareRenderer->lookup[2] = (value >> 4) & 3;
 280		softwareRenderer->lookup[3] = (value >> 6) & 3;
 281		break;
 282	case REG_OBP0:
 283		softwareRenderer->lookup[0x20 + 0] = value & 3;
 284		softwareRenderer->lookup[0x20 + 1] = (value >> 2) & 3;
 285		softwareRenderer->lookup[0x20 + 2] = (value >> 4) & 3;
 286		softwareRenderer->lookup[0x20 + 3] = (value >> 6) & 3;
 287		break;
 288	case REG_OBP1:
 289		softwareRenderer->lookup[0x24 + 0] = value & 3;
 290		softwareRenderer->lookup[0x24 + 1] = (value >> 2) & 3;
 291		softwareRenderer->lookup[0x24 + 2] = (value >> 4) & 3;
 292		softwareRenderer->lookup[0x24 + 3] = (value >> 6) & 3;
 293		break;
 294	}
 295	return value;
 296}
 297
 298static void GBVideoSoftwareRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data) {
 299	struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
 300	memcpy(softwareRenderer->sgbPacket, data, sizeof(softwareRenderer->sgbPacket));
 301	int i;
 302	softwareRenderer->sgbCommandHeader = data[0];
 303	softwareRenderer->sgbTransfer = 0;
 304	int set;
 305	int sets;
 306	int attrX;
 307	int attrY;
 308	int attrDirection;
 309	int pBefore;
 310	int pAfter;
 311	int pDiv;
 312	switch (softwareRenderer->sgbCommandHeader >> 3) {
 313	case SGB_PAL_SET:
 314		softwareRenderer->sgbPacket[1] = data[9];
 315		if (!(data[9] & 0x80)) {
 316			break;
 317		}
 318		// Fall through
 319	case SGB_ATTR_SET:
 320		set = softwareRenderer->sgbPacket[1] & 0x3F;
 321		if (set <= 0x2C) {
 322			memcpy(renderer->sgbAttributes, &renderer->sgbAttributeFiles[set * 90], 90);
 323		}
 324		break;
 325	case SGB_ATTR_BLK:
 326		sets = softwareRenderer->sgbPacket[1];
 327		i = 2;
 328		for (; i < (softwareRenderer->sgbCommandHeader & 7) << 4 && sets; i += 6, --sets) {
 329			_parseAttrBlock(softwareRenderer, i);
 330		}
 331		break;
 332	case SGB_ATTR_LIN:
 333		sets = softwareRenderer->sgbPacket[1];
 334		i = 2;
 335		for (; i < (softwareRenderer->sgbCommandHeader & 7) << 4 && sets; ++i, --sets) {
 336			_parseAttrLine(softwareRenderer, i);
 337		}
 338		break;
 339	case SGB_ATTR_DIV:
 340		pAfter = softwareRenderer->sgbPacket[1] & 3;
 341		pBefore = (softwareRenderer->sgbPacket[1] >> 2) & 3;
 342		pDiv = (softwareRenderer->sgbPacket[1] >> 4) & 3;
 343		attrX = softwareRenderer->sgbPacket[2];
 344		if (softwareRenderer->sgbPacket[1] & 0x40) {
 345			if (attrX > GB_VIDEO_VERTICAL_PIXELS / 8) {
 346				attrX = GB_VIDEO_VERTICAL_PIXELS / 8;
 347			}
 348			int j;
 349			for (j = 0; j < attrX; ++j) {
 350				for (i = 0; i < GB_VIDEO_HORIZONTAL_PIXELS / 8; ++i) {
 351					_setAttribute(renderer->sgbAttributes, i, j, pBefore);
 352				}
 353			}
 354			if (attrX < GB_VIDEO_VERTICAL_PIXELS / 8) {
 355				for (i = 0; i < GB_VIDEO_HORIZONTAL_PIXELS / 8; ++i) {
 356					_setAttribute(renderer->sgbAttributes, i, attrX, pDiv);
 357				}
 358
 359			}
 360			for (; j < GB_VIDEO_VERTICAL_PIXELS / 8; ++j) {
 361				for (i = 0; i < GB_VIDEO_HORIZONTAL_PIXELS / 8; ++i) {
 362					_setAttribute(renderer->sgbAttributes, i, j, pAfter);
 363				}
 364			}
 365		} else {
 366			if (attrX > GB_VIDEO_HORIZONTAL_PIXELS / 8) {
 367				attrX = GB_VIDEO_HORIZONTAL_PIXELS / 8;
 368			}
 369			int j;
 370			for (j = 0; j < attrX; ++j) {
 371				for (i = 0; i < GB_VIDEO_HORIZONTAL_PIXELS / 8; ++i) {
 372					_setAttribute(renderer->sgbAttributes, j, i, pBefore);
 373				}
 374			}
 375			if (attrX < GB_VIDEO_HORIZONTAL_PIXELS / 8) {
 376				for (i = 0; i < GB_VIDEO_VERTICAL_PIXELS / 8; ++i) {
 377					_setAttribute(renderer->sgbAttributes, attrX, i, pDiv);
 378				}
 379
 380			}
 381			for (; j < GB_VIDEO_HORIZONTAL_PIXELS / 8; ++j) {
 382				for (i = 0; i < GB_VIDEO_VERTICAL_PIXELS / 8; ++i) {
 383					_setAttribute(renderer->sgbAttributes, j, i, pAfter);
 384				}
 385			}
 386		}
 387		break;
 388	case SGB_ATTR_CHR:
 389		attrX = softwareRenderer->sgbPacket[1];
 390		attrY = softwareRenderer->sgbPacket[2];
 391		if (attrX >= GB_VIDEO_HORIZONTAL_PIXELS / 8) {
 392			attrX = 0;
 393		}
 394		if (attrY >= GB_VIDEO_VERTICAL_PIXELS / 8) {
 395			attrY = 0;
 396		}
 397		sets = softwareRenderer->sgbPacket[3];
 398		sets |= softwareRenderer->sgbPacket[4] << 8;
 399		attrDirection = softwareRenderer->sgbPacket[5];
 400		i = 6;
 401		for (; i < (softwareRenderer->sgbCommandHeader & 7) << 4 && sets; ++i) {
 402			int j;
 403			for (j = 0; j < 4 && sets; ++j, --sets) {
 404				uint8_t p = softwareRenderer->sgbPacket[i] >> (6 - j * 2);
 405				_setAttribute(renderer->sgbAttributes, attrX, attrY, p & 3);
 406				if (attrDirection) {
 407					++attrY;
 408					if (attrY >= GB_VIDEO_VERTICAL_PIXELS / 8) {
 409						attrY = 0;
 410						++attrX;
 411					}
 412					if (attrX >= GB_VIDEO_HORIZONTAL_PIXELS / 8) {
 413						attrX = 0;
 414					}
 415				} else {
 416					++attrX;
 417					if (attrX >= GB_VIDEO_HORIZONTAL_PIXELS / 8) {
 418						attrX = 0;
 419						++attrY;
 420					}
 421					if (attrY >= GB_VIDEO_VERTICAL_PIXELS / 8) {
 422						attrY = 0;
 423					}
 424				}
 425			}
 426		}
 427
 428		break;
 429	case SGB_ATRC_EN:
 430	case SGB_MASK_EN:
 431		if (softwareRenderer->sgbBorders && !renderer->sgbRenderMode) {
 432			_regenerateSGBBorder(softwareRenderer);
 433		}
 434	}
 435}
 436
 437static void GBVideoSoftwareRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value) {
 438	struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
 439	color_t color = mColorFrom555(value);
 440	if (softwareRenderer->model & GB_MODEL_SGB) {
 441		if (index < 0x10 && index && !(index & 3)) {
 442			color = softwareRenderer->palette[0];
 443		} else if (index >= 0x40 && !(index & 0xF)) {
 444			color = softwareRenderer->palette[0];
 445		}
 446	}
 447	if (renderer->cache) {
 448		mCacheSetWritePalette(renderer->cache, index, color);
 449	}
 450	if (softwareRenderer->model == GB_MODEL_AGB) {
 451		unsigned r = M_R5(value);
 452		unsigned g = M_G5(value);
 453		unsigned b = M_B5(value);
 454		r = r * r;
 455		g = g * g;
 456		b = b * b;
 457#ifdef COLOR_16_BIT
 458		r /= 31;
 459		g /= 31;
 460		b /= 31;
 461		color = mColorFrom555(r | (g << 5) | (b << 10));
 462#else
 463		r >>= 2;
 464		r += r >> 4;
 465		g >>= 2;
 466		g += g >> 4;
 467		b >>= 2;
 468		b += b >> 4;
 469		color = r | (g << 8) | (b << 16);
 470#endif
 471	}
 472	softwareRenderer->palette[index] = color;
 473
 474	if (softwareRenderer->model & GB_MODEL_SGB && !index && GBRegisterLCDCIsEnable(softwareRenderer->lcdc)) {
 475		renderer->writePalette(renderer, 0x04, value);
 476		renderer->writePalette(renderer, 0x08, value);
 477		renderer->writePalette(renderer, 0x0C, value);
 478		renderer->writePalette(renderer, 0x40, value);
 479		renderer->writePalette(renderer, 0x50, value);
 480		renderer->writePalette(renderer, 0x60, value);
 481		renderer->writePalette(renderer, 0x70, value);
 482		if (softwareRenderer->sgbBorders && !renderer->sgbRenderMode) {
 483			_regenerateSGBBorder(softwareRenderer);
 484		}
 485	}
 486}
 487
 488static void GBVideoSoftwareRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address) {
 489	if (renderer->cache) {
 490		mCacheSetWriteVRAM(renderer->cache, address);
 491	}
 492}
 493
 494static void GBVideoSoftwareRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam) {
 495	UNUSED(renderer);
 496	UNUSED(oam);
 497	// Nothing to do
 498}
 499
 500static void GBVideoSoftwareRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax) {
 501	struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
 502	softwareRenderer->lastY = y;
 503	softwareRenderer->lastX = endX;
 504	uint8_t* maps = &softwareRenderer->d.vram[GB_BASE_MAP];
 505	if (GBRegisterLCDCIsTileMap(softwareRenderer->lcdc)) {
 506		maps += GB_SIZE_MAP;
 507	}
 508	if (softwareRenderer->d.disableBG) {
 509		memset(&softwareRenderer->row[startX], 0, endX - startX);
 510	}
 511	if (GBRegisterLCDCIsBgEnable(softwareRenderer->lcdc) || softwareRenderer->model >= GB_MODEL_CGB) {
 512		int wy = softwareRenderer->wy + softwareRenderer->currentWy;
 513		int wx = softwareRenderer->wx + softwareRenderer->currentWx - 7;
 514		if (GBRegisterLCDCIsWindow(softwareRenderer->lcdc) && wy == y && wx <= endX) {
 515			softwareRenderer->hasWindow = true;
 516		}
 517		if (GBRegisterLCDCIsWindow(softwareRenderer->lcdc) && softwareRenderer->hasWindow && wx <= endX) {
 518			if (wx > 0 && !softwareRenderer->d.disableBG) {
 519				GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, startX, wx, softwareRenderer->scx - softwareRenderer->offsetScx, softwareRenderer->scy + y - softwareRenderer->offsetScy);
 520			}
 521
 522			maps = &softwareRenderer->d.vram[GB_BASE_MAP];
 523			if (GBRegisterLCDCIsWindowTileMap(softwareRenderer->lcdc)) {
 524				maps += GB_SIZE_MAP;
 525			}
 526			if (!softwareRenderer->d.disableWIN) {
 527				GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, wx, endX, -wx - softwareRenderer->offsetWx, y - wy - softwareRenderer->offsetWy);
 528			}
 529		} else if (!softwareRenderer->d.disableBG) {
 530			GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, startX, endX, softwareRenderer->scx - softwareRenderer->offsetScx, softwareRenderer->scy + y - softwareRenderer->offsetScy);
 531		}
 532	} else if (!softwareRenderer->d.disableBG) {
 533		memset(&softwareRenderer->row[startX], 0, endX - startX);
 534	}
 535
 536	if (GBRegisterLCDCIsObjEnable(softwareRenderer->lcdc) && !softwareRenderer->d.disableOBJ) {
 537		size_t i;
 538		for (i = 0; i < oamMax; ++i) {
 539			GBVideoSoftwareRendererDrawObj(softwareRenderer, &obj[i], startX, endX, y);
 540		}
 541	}
 542
 543	size_t sgbOffset = 0;
 544	if (softwareRenderer->model & GB_MODEL_SGB && softwareRenderer->sgbBorders) {
 545		sgbOffset = softwareRenderer->outputBufferStride * 40 + 48;
 546	}
 547	color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y + sgbOffset];
 548	int x = startX;
 549	int p = 0;
 550	switch (softwareRenderer->d.sgbRenderMode) {
 551	case 0:
 552		if (softwareRenderer->model & GB_MODEL_SGB) {
 553			p = softwareRenderer->d.sgbAttributes[(startX >> 5) + 5 * (y >> 3)];
 554			p >>= 6 - ((x / 4) & 0x6);
 555			p &= 3;
 556			p <<= 2;
 557		}
 558		for (; x < ((startX + 7) & ~7) && x < endX; ++x) {
 559			row[x] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x] & 0x7F]];
 560		}
 561		for (; x + 7 < (endX & ~7); x += 8) {
 562			if (softwareRenderer->model & GB_MODEL_SGB) {
 563				p = softwareRenderer->d.sgbAttributes[(x >> 5) + 5 * (y >> 3)];
 564				p >>= 6 - ((x / 4) & 0x6);
 565				p &= 3;
 566				p <<= 2;
 567			}
 568			row[x + 0] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x] & 0x7F]];
 569			row[x + 1] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 1] & 0x7F]];
 570			row[x + 2] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 2] & 0x7F]];
 571			row[x + 3] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 3] & 0x7F]];
 572			row[x + 4] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 4] & 0x7F]];
 573			row[x + 5] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 5] & 0x7F]];
 574			row[x + 6] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 6] & 0x7F]];
 575			row[x + 7] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 7] & 0x7F]];
 576		}
 577		if (softwareRenderer->model & GB_MODEL_SGB) {
 578			p = softwareRenderer->d.sgbAttributes[(x >> 5) + 5 * (y >> 3)];
 579			p >>= 6 - ((x / 4) & 0x6);
 580			p &= 3;
 581			p <<= 2;
 582		}
 583		for (; x < endX; ++x) {
 584			row[x] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x] & 0x7F]];
 585		}
 586		break;
 587	case 1:
 588		break;
 589	case 2:
 590		for (; x < ((startX + 7) & ~7) && x < endX; ++x) {
 591			row[x] = 0;
 592		}
 593		for (; x + 7 < (endX & ~7); x += 8) {
 594			row[x] = 0;
 595			row[x + 1] = 0;
 596			row[x + 2] = 0;
 597			row[x + 3] = 0;
 598			row[x + 4] = 0;
 599			row[x + 5] = 0;
 600			row[x + 6] = 0;
 601			row[x + 7] = 0;
 602		}
 603		for (; x < endX; ++x) {
 604			row[x] = 0;
 605		}
 606		break;
 607	case 3:
 608		for (; x < ((startX + 7) & ~7) && x < endX; ++x) {
 609			row[x] = softwareRenderer->palette[0];
 610		}
 611		for (; x + 7 < (endX & ~7); x += 8) {
 612			row[x] = softwareRenderer->palette[0];
 613			row[x + 1] = softwareRenderer->palette[0];
 614			row[x + 2] = softwareRenderer->palette[0];
 615			row[x + 3] = softwareRenderer->palette[0];
 616			row[x + 4] = softwareRenderer->palette[0];
 617			row[x + 5] = softwareRenderer->palette[0];
 618			row[x + 6] = softwareRenderer->palette[0];
 619			row[x + 7] = softwareRenderer->palette[0];
 620		}
 621		for (; x < endX; ++x) {
 622			row[x] = softwareRenderer->palette[0];
 623		}
 624		break;
 625	}
 626}
 627
 628static void GBVideoSoftwareRendererFinishScanline(struct GBVideoRenderer* renderer, int y) {
 629	struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
 630
 631	softwareRenderer->lastX = 0;
 632	softwareRenderer->currentWx = 0;
 633
 634	if (softwareRenderer->sgbTransfer == 1) {
 635		size_t offset = 2 * ((y & 7) + (y >> 3) * GB_VIDEO_HORIZONTAL_PIXELS);
 636		if (offset >= 0x1000) {
 637			return;
 638		}
 639		uint8_t* buffer = NULL;
 640		switch (softwareRenderer->sgbCommandHeader >> 3) {
 641		case SGB_PAL_TRN:
 642			buffer = renderer->sgbPalRam;
 643			break;
 644		case SGB_CHR_TRN:
 645			buffer = &renderer->sgbCharRam[SGB_SIZE_CHAR_RAM / 2 * (softwareRenderer->sgbPacket[1] & 1)];
 646			break;
 647		case SGB_PCT_TRN:
 648			buffer = renderer->sgbMapRam;
 649			break;
 650		case SGB_ATTR_TRN:
 651			buffer = renderer->sgbAttributeFiles;
 652			break;
 653		default:
 654			break;
 655		}
 656		if (buffer) {
 657			int i;
 658			for (i = 0; i < GB_VIDEO_HORIZONTAL_PIXELS; i += 8) {
 659				if (UNLIKELY(offset + (i << 1) + 1 >= 0x1000)) {
 660					break;
 661				}
 662				uint8_t hi = 0;
 663				uint8_t lo = 0;
 664				hi |= (softwareRenderer->row[i + 0] & 0x2) << 6;
 665				lo |= (softwareRenderer->row[i + 0] & 0x1) << 7;
 666				hi |= (softwareRenderer->row[i + 1] & 0x2) << 5;
 667				lo |= (softwareRenderer->row[i + 1] & 0x1) << 6;
 668				hi |= (softwareRenderer->row[i + 2] & 0x2) << 4;
 669				lo |= (softwareRenderer->row[i + 2] & 0x1) << 5;
 670				hi |= (softwareRenderer->row[i + 3] & 0x2) << 3;
 671				lo |= (softwareRenderer->row[i + 3] & 0x1) << 4;
 672				hi |= (softwareRenderer->row[i + 4] & 0x2) << 2;
 673				lo |= (softwareRenderer->row[i + 4] & 0x1) << 3;
 674				hi |= (softwareRenderer->row[i + 5] & 0x2) << 1;
 675				lo |= (softwareRenderer->row[i + 5] & 0x1) << 2;
 676				hi |= (softwareRenderer->row[i + 6] & 0x2) << 0;
 677				lo |= (softwareRenderer->row[i + 6] & 0x1) << 1;
 678				hi |= (softwareRenderer->row[i + 7] & 0x2) >> 1;
 679				lo |= (softwareRenderer->row[i + 7] & 0x1) >> 0;
 680				buffer[offset + (i << 1) + 0] = lo;
 681				buffer[offset + (i << 1) + 1] = hi;
 682			}
 683		}
 684	}
 685}
 686
 687static void GBVideoSoftwareRendererFinishFrame(struct GBVideoRenderer* renderer) {
 688	struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
 689
 690	if (softwareRenderer->temporaryBuffer) {
 691		mappedMemoryFree(softwareRenderer->temporaryBuffer, GB_VIDEO_HORIZONTAL_PIXELS * GB_VIDEO_VERTICAL_PIXELS * 4);
 692		softwareRenderer->temporaryBuffer = 0;
 693	}
 694	if (!GBRegisterLCDCIsEnable(softwareRenderer->lcdc)) {
 695		_clearScreen(softwareRenderer);
 696	}
 697	if (softwareRenderer->model & GB_MODEL_SGB) {
 698		switch (softwareRenderer->sgbCommandHeader >> 3) {
 699		case SGB_PAL_SET:
 700		case SGB_ATTR_SET:
 701			if (softwareRenderer->sgbPacket[1] & 0x40) {
 702				renderer->sgbRenderMode = 0;
 703			}
 704			break;
 705		case SGB_PAL_TRN:
 706		case SGB_CHR_TRN:
 707		case SGB_PCT_TRN:
 708			if (softwareRenderer->sgbTransfer > 0 && softwareRenderer->sgbBorders && !renderer->sgbRenderMode) {
 709				// Make sure every buffer sees this if we're multibuffering
 710				_regenerateSGBBorder(softwareRenderer);
 711			}
 712			// Fall through
 713		case SGB_ATTR_TRN:
 714			++softwareRenderer->sgbTransfer;
 715			if (softwareRenderer->sgbTransfer == 5) {
 716				softwareRenderer->sgbCommandHeader = 0;
 717			}
 718			break;
 719		default:
 720			break;
 721		}
 722	}
 723	softwareRenderer->lastY = GB_VIDEO_VERTICAL_PIXELS;
 724	softwareRenderer->lastX = 0;
 725	softwareRenderer->currentWy = 0;
 726	softwareRenderer->currentWx = 0;
 727	softwareRenderer->hasWindow = false;
 728}
 729
 730static void GBVideoSoftwareRendererEnableSGBBorder(struct GBVideoRenderer* renderer, bool enable) {
 731	struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
 732	if (softwareRenderer->model & GB_MODEL_SGB) {
 733		if (enable == softwareRenderer->sgbBorders) {
 734			return;
 735		}
 736		softwareRenderer->sgbBorders = enable;
 737		if (softwareRenderer->sgbBorders && !renderer->sgbRenderMode) {
 738			_regenerateSGBBorder(softwareRenderer);
 739		}
 740	}
 741}
 742
 743static void GBVideoSoftwareRendererDrawBackground(struct GBVideoSoftwareRenderer* renderer, uint8_t* maps, int startX, int endX, int sx, int sy) {
 744	uint8_t* data = renderer->d.vram;
 745	uint8_t* attr = &maps[GB_SIZE_VRAM_BANK0];
 746	if (!GBRegisterLCDCIsTileData(renderer->lcdc)) {
 747		data += 0x1000;
 748	}
 749	int topY = ((sy >> 3) & 0x1F) * 0x20;
 750	int bottomY = sy & 7;
 751	if (startX < 0) {
 752		startX = 0;
 753	}
 754	int x;
 755	if ((startX + sx) & 7) {
 756		int startX2 = startX + 8 - ((startX + sx) & 7);
 757		for (x = startX; x < startX2; ++x) {
 758			uint8_t* localData = data;
 759			int localY = bottomY;
 760			int topX = ((x + sx) >> 3) & 0x1F;
 761			int bottomX = 7 - ((x + sx) & 7);
 762			int bgTile;
 763			if (GBRegisterLCDCIsTileData(renderer->lcdc)) {
 764				bgTile = maps[topX + topY];
 765			} else {
 766				bgTile = ((int8_t*) maps)[topX + topY];
 767			}
 768			int p = 0;
 769			if (renderer->model >= GB_MODEL_CGB) {
 770				GBObjAttributes attrs = attr[topX + topY];
 771				p = GBObjAttributesGetCGBPalette(attrs) * 4;
 772				if (GBObjAttributesIsPriority(attrs) && GBRegisterLCDCIsBgEnable(renderer->lcdc)) {
 773					p |= 0x80;
 774				}
 775				if (GBObjAttributesIsBank(attrs)) {
 776					localData += GB_SIZE_VRAM_BANK0;
 777				}
 778				if (GBObjAttributesIsYFlip(attrs)) {
 779					localY = 7 - bottomY;
 780				}
 781				if (GBObjAttributesIsXFlip(attrs)) {
 782					bottomX = 7 - bottomX;
 783				}
 784			}
 785			uint8_t tileDataLower = localData[(bgTile * 8 + localY) * 2];
 786			uint8_t tileDataUpper = localData[(bgTile * 8 + localY) * 2 + 1];
 787			tileDataUpper >>= bottomX;
 788			tileDataLower >>= bottomX;
 789			renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
 790		}
 791		startX = startX2;
 792	}
 793	for (x = startX; x < endX; x += 8) {
 794		uint8_t* localData = data;
 795		int localY = bottomY;
 796		int topX = ((x + sx) >> 3) & 0x1F;
 797		int bgTile;
 798		if (GBRegisterLCDCIsTileData(renderer->lcdc)) {
 799			bgTile = maps[topX + topY];
 800		} else {
 801			bgTile = ((int8_t*) maps)[topX + topY];
 802		}
 803		int p = 0;
 804		if (renderer->model >= GB_MODEL_CGB) {
 805			GBObjAttributes attrs = attr[topX + topY];
 806			p = GBObjAttributesGetCGBPalette(attrs) * 4;
 807			if (GBObjAttributesIsPriority(attrs) && GBRegisterLCDCIsBgEnable(renderer->lcdc)) {
 808				p |= 0x80;
 809			}
 810			if (GBObjAttributesIsBank(attrs)) {
 811				localData += GB_SIZE_VRAM_BANK0;
 812			}
 813			if (GBObjAttributesIsYFlip(attrs)) {
 814				localY = 7 - bottomY;
 815			}
 816			if (GBObjAttributesIsXFlip(attrs)) {
 817				uint8_t tileDataLower = localData[(bgTile * 8 + localY) * 2];
 818				uint8_t tileDataUpper = localData[(bgTile * 8 + localY) * 2 + 1];
 819				renderer->row[x + 0] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
 820				renderer->row[x + 1] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
 821				renderer->row[x + 2] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
 822				renderer->row[x + 3] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
 823				renderer->row[x + 4] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
 824				renderer->row[x + 5] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
 825				renderer->row[x + 6] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
 826				renderer->row[x + 7] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
 827				continue;
 828			}
 829		}
 830		uint8_t tileDataLower = localData[(bgTile * 8 + localY) * 2];
 831		uint8_t tileDataUpper = localData[(bgTile * 8 + localY) * 2 + 1];
 832		renderer->row[x + 7] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
 833		renderer->row[x + 6] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
 834		renderer->row[x + 5] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
 835		renderer->row[x + 4] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
 836		renderer->row[x + 3] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
 837		renderer->row[x + 2] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
 838		renderer->row[x + 1] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
 839		renderer->row[x + 0] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
 840	}
 841}
 842
 843static void GBVideoSoftwareRendererDrawObj(struct GBVideoSoftwareRenderer* renderer, struct GBObj* obj, int startX, int endX, int y) {
 844	int objX = obj->x + renderer->objOffsetX;
 845	int ix = objX - 8;
 846	if (endX < ix || startX >= ix + 8) {
 847		return;
 848	}
 849	if (objX < endX) {
 850		endX = objX;
 851	}
 852	if (objX - 8 > startX) {
 853		startX = objX - 8;
 854	}
 855	if (startX < 0) {
 856		startX = 0;
 857	}
 858	uint8_t* data = renderer->d.vram;
 859	int tileOffset = 0;
 860	int bottomY;
 861	int objY = obj->y + renderer->objOffsetY;
 862	if (GBObjAttributesIsYFlip(obj->attr)) {
 863		bottomY = 7 - ((y - objY - 16) & 7);
 864		if (GBRegisterLCDCIsObjSize(renderer->lcdc) && y - objY < -8) {
 865			++tileOffset;
 866		}
 867	} else {
 868		bottomY = (y - objY - 16) & 7;
 869		if (GBRegisterLCDCIsObjSize(renderer->lcdc) && y - objY >= -8) {
 870			++tileOffset;
 871		}
 872	}
 873	if (GBRegisterLCDCIsObjSize(renderer->lcdc) && obj->tile & 1) {
 874		--tileOffset;
 875	}
 876	uint8_t mask = GBObjAttributesIsPriority(obj->attr) ? 0x63 : 0x60;
 877	uint8_t mask2 = GBObjAttributesIsPriority(obj->attr) ? 0 : 0x83;
 878	int p;
 879	if (renderer->model >= GB_MODEL_CGB) {
 880		p = (GBObjAttributesGetCGBPalette(obj->attr) + 8) * 4;
 881		if (GBObjAttributesIsBank(obj->attr)) {
 882			data += GB_SIZE_VRAM_BANK0;
 883		}
 884		if (!GBRegisterLCDCIsBgEnable(renderer->lcdc)) {
 885			mask = 0x60;
 886			mask2 = 0x83;
 887		}
 888	} else {
 889		p = (GBObjAttributesGetPalette(obj->attr) + 8) * 4;
 890	}
 891	int bottomX;
 892	int x = startX;
 893	if ((x - objX) & 7) {
 894		for (; x < endX; ++x) {
 895			if (GBObjAttributesIsXFlip(obj->attr)) {
 896				bottomX = (x - objX) & 7;
 897			} else {
 898				bottomX = 7 - ((x - objX) & 7);
 899			}
 900			int objTile = obj->tile + tileOffset;
 901			uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
 902			uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
 903			tileDataUpper >>= bottomX;
 904			tileDataLower >>= bottomX;
 905			color_t current = renderer->row[x];
 906			if (((tileDataUpper | tileDataLower) & 1) && !(current & mask) && (current & mask2) <= 0x80) {
 907				renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
 908			}
 909		}
 910	} else if (GBObjAttributesIsXFlip(obj->attr)) {
 911		int objTile = obj->tile + tileOffset;
 912		uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
 913		uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
 914		color_t current;
 915		current = renderer->row[x];
 916		if (((tileDataUpper | tileDataLower) & 1) && !(current & mask) && (current & mask2) <= 0x80) {
 917			renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
 918		}
 919		current = renderer->row[x + 1];
 920		if (((tileDataUpper | tileDataLower) & 2) && !(current & mask) && (current & mask2) <= 0x80) {
 921			renderer->row[x + 1] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
 922		}
 923		current = renderer->row[x + 2];
 924		if (((tileDataUpper | tileDataLower) & 4) && !(current & mask) && (current & mask2) <= 0x80) {
 925			renderer->row[x + 2] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
 926		}
 927		current = renderer->row[x + 3];
 928		if (((tileDataUpper | tileDataLower) & 8) && !(current & mask) && (current & mask2) <= 0x80) {
 929			renderer->row[x + 3] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
 930		}
 931		current = renderer->row[x + 4];
 932		if (((tileDataUpper | tileDataLower) & 16) && !(current & mask) && (current & mask2) <= 0x80) {
 933			renderer->row[x + 4] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
 934		}
 935		current = renderer->row[x + 5];
 936		if (((tileDataUpper | tileDataLower) & 32) && !(current & mask) && (current & mask2) <= 0x80) {
 937			renderer->row[x + 5] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
 938		}
 939		current = renderer->row[x + 6];
 940		if (((tileDataUpper | tileDataLower) & 64) && !(current & mask) && (current & mask2) <= 0x80) {
 941			renderer->row[x + 6] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
 942		}
 943		current = renderer->row[x + 7];
 944		if (((tileDataUpper | tileDataLower) & 128) && !(current & mask) && (current & mask2) <= 0x80) {
 945			renderer->row[x + 7] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
 946		}
 947	} else {
 948		int objTile = obj->tile + tileOffset;
 949		uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
 950		uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
 951		color_t current;
 952		current = renderer->row[x + 7];
 953		if (((tileDataUpper | tileDataLower) & 1) && !(current & mask) && (current & mask2) <= 0x80) {
 954			renderer->row[x + 7] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
 955		}
 956		current = renderer->row[x + 6];
 957		if (((tileDataUpper | tileDataLower) & 2) && !(current & mask) && (current & mask2) <= 0x80) {
 958			renderer->row[x + 6] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
 959		}
 960		current = renderer->row[x + 5];
 961		if (((tileDataUpper | tileDataLower) & 4) && !(current & mask) && (current & mask2) <= 0x80) {
 962			renderer->row[x + 5] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
 963		}
 964		current = renderer->row[x + 4];
 965		if (((tileDataUpper | tileDataLower) & 8) && !(current & mask) && (current & mask2) <= 0x80) {
 966			renderer->row[x + 4] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
 967		}
 968		current = renderer->row[x + 3];
 969		if (((tileDataUpper | tileDataLower) & 16) && !(current & mask) && (current & mask2) <= 0x80) {
 970			renderer->row[x + 3] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
 971		}
 972		current = renderer->row[x + 2];
 973		if (((tileDataUpper | tileDataLower) & 32) && !(current & mask) && (current & mask2) <= 0x80) {
 974			renderer->row[x + 2] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
 975		}
 976		current = renderer->row[x + 1];
 977		if (((tileDataUpper | tileDataLower) & 64) && !(current & mask) && (current & mask2) <= 0x80) {
 978			renderer->row[x + 1] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
 979		}
 980		current = renderer->row[x];
 981		if (((tileDataUpper | tileDataLower) & 128) && !(current & mask) && (current & mask2) <= 0x80) {
 982			renderer->row[x] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
 983		}
 984	}
 985}
 986
 987static void GBVideoSoftwareRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels) {
 988	struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
 989	*stride = softwareRenderer->outputBufferStride;
 990	*pixels = softwareRenderer->outputBuffer;
 991}
 992
 993static void GBVideoSoftwareRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels) {
 994	struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
 995	// TODO: Share with GBAVideoSoftwareRendererGetPixels
 996
 997	const color_t* colorPixels = pixels;
 998	unsigned i;
 999	for (i = 0; i < GB_VIDEO_VERTICAL_PIXELS; ++i) {
1000		memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], GB_VIDEO_HORIZONTAL_PIXELS * BYTES_PER_PIXEL);
1001	}
1002}