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