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