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 if (softwareRenderer->sgbBorders && !renderer->sgbRenderMode) {
382 _regenerateSGBBorder(softwareRenderer);
383 }
384 break;
385 case SGB_MASK_EN:
386 if (!renderer->sgbRenderMode) {
387 _regenerateSGBBorder(softwareRenderer);
388 }
389 }
390}
391
392static void GBVideoSoftwareRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value) {
393 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
394 color_t color = mColorFrom555(value);
395 if (softwareRenderer->model == GB_MODEL_SGB) {
396 if (index < 0x10 && index && !(index & 3)) {
397 color = softwareRenderer->palette[0];
398 } else if (index >= 0x40 && !(index & 0xF)) {
399 color = softwareRenderer->palette[0];
400 }
401 }
402 softwareRenderer->palette[index] = color;
403 if (renderer->cache) {
404 mCacheSetWritePalette(renderer->cache, index, color);
405 }
406
407 if (softwareRenderer->model == GB_MODEL_SGB && !index && GBRegisterLCDCIsEnable(softwareRenderer->lcdc)) {
408 renderer->writePalette(renderer, 0x04, value);
409 renderer->writePalette(renderer, 0x08, value);
410 renderer->writePalette(renderer, 0x0C, value);
411 renderer->writePalette(renderer, 0x40, value);
412 renderer->writePalette(renderer, 0x50, value);
413 renderer->writePalette(renderer, 0x60, value);
414 renderer->writePalette(renderer, 0x70, value);
415 if (!renderer->sgbRenderMode) {
416 _regenerateSGBBorder(softwareRenderer);
417 }
418 }
419}
420
421static void GBVideoSoftwareRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address) {
422 if (renderer->cache) {
423 mCacheSetWriteVRAM(renderer->cache, address);
424 }
425}
426
427static void GBVideoSoftwareRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam) {
428 UNUSED(renderer);
429 UNUSED(oam);
430 // Nothing to do
431}
432
433static void GBVideoSoftwareRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax) {
434 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
435 softwareRenderer->lastY = y;
436 uint8_t* maps = &softwareRenderer->d.vram[GB_BASE_MAP];
437 if (GBRegisterLCDCIsTileMap(softwareRenderer->lcdc)) {
438 maps += GB_SIZE_MAP;
439 }
440 if (softwareRenderer->d.disableBG) {
441 memset(&softwareRenderer->row[startX], 0, endX - startX);
442 }
443 if (GBRegisterLCDCIsBgEnable(softwareRenderer->lcdc) || softwareRenderer->model >= GB_MODEL_CGB) {
444 int wy = softwareRenderer->wy + softwareRenderer->currentWy;
445 if (GBRegisterLCDCIsWindow(softwareRenderer->lcdc) && wy <= y && endX >= softwareRenderer->wx - 7) {
446 if (softwareRenderer->wx - 7 > 0 && !softwareRenderer->d.disableBG) {
447 GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, startX, softwareRenderer->wx - 7, softwareRenderer->scx, softwareRenderer->scy + y);
448 }
449
450 maps = &softwareRenderer->d.vram[GB_BASE_MAP];
451 if (GBRegisterLCDCIsWindowTileMap(softwareRenderer->lcdc)) {
452 maps += GB_SIZE_MAP;
453 }
454 if (!softwareRenderer->d.disableWIN) {
455 GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, softwareRenderer->wx - 7, endX, 7 - softwareRenderer->wx, y - wy);
456 }
457 } else if (!softwareRenderer->d.disableBG) {
458 GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, startX, endX, softwareRenderer->scx, softwareRenderer->scy + y);
459 }
460 } else if (!softwareRenderer->d.disableBG) {
461 memset(&softwareRenderer->row[startX], 0, endX - startX);
462 }
463
464 if (GBRegisterLCDCIsObjEnable(softwareRenderer->lcdc) && !softwareRenderer->d.disableOBJ) {
465 size_t i;
466 for (i = 0; i < oamMax; ++i) {
467 GBVideoSoftwareRendererDrawObj(softwareRenderer, &obj[i], startX, endX, y);
468 }
469 }
470
471 size_t sgbOffset = 0;
472 if (softwareRenderer->model == GB_MODEL_SGB && softwareRenderer->sgbBorders) {
473 sgbOffset = softwareRenderer->outputBufferStride * 40 + 48;
474 }
475 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y + sgbOffset];
476 int x = startX;
477 int p = 0;
478 switch (softwareRenderer->d.sgbRenderMode) {
479 case 0:
480 if (softwareRenderer->model == GB_MODEL_SGB) {
481 p = softwareRenderer->d.sgbAttributes[(startX >> 5) + 5 * (y >> 3)];
482 p >>= 6 - ((x / 4) & 0x6);
483 p &= 3;
484 p <<= 2;
485 }
486 for (; x < ((startX + 7) & ~7) && x < endX; ++x) {
487 row[x] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x] & 0x7F]];
488 }
489 for (; x + 7 < (endX & ~7); x += 8) {
490 if (softwareRenderer->model == GB_MODEL_SGB) {
491 p = softwareRenderer->d.sgbAttributes[(x >> 5) + 5 * (y >> 3)];
492 p >>= 6 - ((x / 4) & 0x6);
493 p &= 3;
494 p <<= 2;
495 }
496 row[x + 0] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x] & 0x7F]];
497 row[x + 1] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 1] & 0x7F]];
498 row[x + 2] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 2] & 0x7F]];
499 row[x + 3] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 3] & 0x7F]];
500 row[x + 4] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 4] & 0x7F]];
501 row[x + 5] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 5] & 0x7F]];
502 row[x + 6] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 6] & 0x7F]];
503 row[x + 7] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 7] & 0x7F]];
504 }
505 if (softwareRenderer->model == GB_MODEL_SGB) {
506 p = softwareRenderer->d.sgbAttributes[(x >> 5) + 5 * (y >> 3)];
507 p >>= 6 - ((x / 4) & 0x6);
508 p &= 3;
509 p <<= 2;
510 }
511 for (; x < endX; ++x) {
512 row[x] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x] & 0x7F]];
513 }
514 break;
515 case 1:
516 break;
517 case 2:
518 for (; x < ((startX + 7) & ~7) && x < endX; ++x) {
519 row[x] = 0;
520 }
521 for (; x + 7 < (endX & ~7); x += 8) {
522 row[x] = 0;
523 row[x + 1] = 0;
524 row[x + 2] = 0;
525 row[x + 3] = 0;
526 row[x + 4] = 0;
527 row[x + 5] = 0;
528 row[x + 6] = 0;
529 row[x + 7] = 0;
530 }
531 for (; x < endX; ++x) {
532 row[x] = 0;
533 }
534 break;
535 case 3:
536 for (; x < ((startX + 7) & ~7) && x < endX; ++x) {
537 row[x] = softwareRenderer->palette[0];
538 }
539 for (; x + 7 < (endX & ~7); x += 8) {
540 row[x] = softwareRenderer->palette[0];
541 row[x + 1] = softwareRenderer->palette[0];
542 row[x + 2] = softwareRenderer->palette[0];
543 row[x + 3] = softwareRenderer->palette[0];
544 row[x + 4] = softwareRenderer->palette[0];
545 row[x + 5] = softwareRenderer->palette[0];
546 row[x + 6] = softwareRenderer->palette[0];
547 row[x + 7] = softwareRenderer->palette[0];
548 }
549 for (; x < endX; ++x) {
550 row[x] = softwareRenderer->palette[0];
551 }
552 break;
553 }
554}
555
556static void GBVideoSoftwareRendererFinishScanline(struct GBVideoRenderer* renderer, int y) {
557 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
558
559 if (softwareRenderer->sgbTransfer == 1) {
560 size_t offset = 2 * ((y & 7) + (y >> 3) * GB_VIDEO_HORIZONTAL_PIXELS);
561 if (offset >= 0x1000) {
562 return;
563 }
564 uint8_t* buffer = NULL;
565 switch (softwareRenderer->sgbCommandHeader >> 3) {
566 case SGB_PAL_TRN:
567 buffer = renderer->sgbPalRam;
568 break;
569 case SGB_CHR_TRN:
570 buffer = &renderer->sgbCharRam[SGB_SIZE_CHAR_RAM / 2 * (softwareRenderer->sgbPacket[1] & 1)];
571 break;
572 case SGB_PCT_TRN:
573 buffer = renderer->sgbMapRam;
574 break;
575 case SGB_ATTR_TRN:
576 buffer = renderer->sgbAttributeFiles;
577 break;
578 default:
579 break;
580 }
581 if (buffer) {
582 int i;
583 for (i = 0; i < GB_VIDEO_HORIZONTAL_PIXELS; i += 8) {
584 if (UNLIKELY(offset + (i << 1) + 1 >= 0x1000)) {
585 break;
586 }
587 uint8_t hi = 0;
588 uint8_t lo = 0;
589 hi |= (softwareRenderer->row[i + 0] & 0x2) << 6;
590 lo |= (softwareRenderer->row[i + 0] & 0x1) << 7;
591 hi |= (softwareRenderer->row[i + 1] & 0x2) << 5;
592 lo |= (softwareRenderer->row[i + 1] & 0x1) << 6;
593 hi |= (softwareRenderer->row[i + 2] & 0x2) << 4;
594 lo |= (softwareRenderer->row[i + 2] & 0x1) << 5;
595 hi |= (softwareRenderer->row[i + 3] & 0x2) << 3;
596 lo |= (softwareRenderer->row[i + 3] & 0x1) << 4;
597 hi |= (softwareRenderer->row[i + 4] & 0x2) << 2;
598 lo |= (softwareRenderer->row[i + 4] & 0x1) << 3;
599 hi |= (softwareRenderer->row[i + 5] & 0x2) << 1;
600 lo |= (softwareRenderer->row[i + 5] & 0x1) << 2;
601 hi |= (softwareRenderer->row[i + 6] & 0x2) << 0;
602 lo |= (softwareRenderer->row[i + 6] & 0x1) << 1;
603 hi |= (softwareRenderer->row[i + 7] & 0x2) >> 1;
604 lo |= (softwareRenderer->row[i + 7] & 0x1) >> 0;
605 buffer[offset + (i << 1) + 0] = lo;
606 buffer[offset + (i << 1) + 1] = hi;
607 }
608 }
609 }
610}
611
612static void GBVideoSoftwareRendererFinishFrame(struct GBVideoRenderer* renderer) {
613 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
614
615 if (softwareRenderer->temporaryBuffer) {
616 mappedMemoryFree(softwareRenderer->temporaryBuffer, GB_VIDEO_HORIZONTAL_PIXELS * GB_VIDEO_VERTICAL_PIXELS * 4);
617 softwareRenderer->temporaryBuffer = 0;
618 }
619 if (!GBRegisterLCDCIsEnable(softwareRenderer->lcdc)) {
620 _clearScreen(softwareRenderer);
621 }
622 if (softwareRenderer->model == GB_MODEL_SGB) {
623 switch (softwareRenderer->sgbCommandHeader >> 3) {
624 case SGB_PAL_SET:
625 case SGB_ATTR_SET:
626 if (softwareRenderer->sgbPacket[1] & 0x40) {
627 renderer->sgbRenderMode = 0;
628 }
629 break;
630 case SGB_PAL_TRN:
631 case SGB_CHR_TRN:
632 case SGB_PCT_TRN:
633 if (softwareRenderer->sgbTransfer > 0 && softwareRenderer->sgbBorders && !renderer->sgbRenderMode) {
634 // Make sure every buffer sees this if we're multibuffering
635 _regenerateSGBBorder(softwareRenderer);
636 }
637 // Fall through
638 case SGB_ATTR_TRN:
639 ++softwareRenderer->sgbTransfer;
640 if (softwareRenderer->sgbTransfer == 5) {
641 softwareRenderer->sgbCommandHeader = 0;
642 }
643 break;
644 default:
645 break;
646 }
647 }
648 softwareRenderer->lastY = GB_VIDEO_VERTICAL_PIXELS;
649 softwareRenderer->currentWy = 0;
650 softwareRenderer->hasWindow = false;
651}
652
653static void GBVideoSoftwareRendererDrawBackground(struct GBVideoSoftwareRenderer* renderer, uint8_t* maps, int startX, int endX, int sx, int sy) {
654 uint8_t* data = renderer->d.vram;
655 uint8_t* attr = &maps[GB_SIZE_VRAM_BANK0];
656 if (!GBRegisterLCDCIsTileData(renderer->lcdc)) {
657 data += 0x1000;
658 }
659 int topY = ((sy >> 3) & 0x1F) * 0x20;
660 int bottomY = sy & 7;
661 if (startX < 0) {
662 startX = 0;
663 }
664 int x;
665 if ((startX + sx) & 7) {
666 int startX2 = startX + 8 - ((startX + sx) & 7);
667 for (x = startX; x < startX2; ++x) {
668 uint8_t* localData = data;
669 int localY = bottomY;
670 int topX = ((x + sx) >> 3) & 0x1F;
671 int bottomX = 7 - ((x + sx) & 7);
672 int bgTile;
673 if (GBRegisterLCDCIsTileData(renderer->lcdc)) {
674 bgTile = maps[topX + topY];
675 } else {
676 bgTile = ((int8_t*) maps)[topX + topY];
677 }
678 int p = 0;
679 if (renderer->model >= GB_MODEL_CGB) {
680 GBObjAttributes attrs = attr[topX + topY];
681 p = GBObjAttributesGetCGBPalette(attrs) * 4;
682 if (GBObjAttributesIsPriority(attrs) && GBRegisterLCDCIsBgEnable(renderer->lcdc)) {
683 p |= 0x80;
684 }
685 if (GBObjAttributesIsBank(attrs)) {
686 localData += GB_SIZE_VRAM_BANK0;
687 }
688 if (GBObjAttributesIsYFlip(attrs)) {
689 localY = 7 - bottomY;
690 }
691 if (GBObjAttributesIsXFlip(attrs)) {
692 bottomX = 7 - bottomX;
693 }
694 }
695 uint8_t tileDataLower = localData[(bgTile * 8 + localY) * 2];
696 uint8_t tileDataUpper = localData[(bgTile * 8 + localY) * 2 + 1];
697 tileDataUpper >>= bottomX;
698 tileDataLower >>= bottomX;
699 renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
700 }
701 startX = startX2;
702 }
703 for (x = startX; x < endX; x += 8) {
704 uint8_t* localData = data;
705 int localY = bottomY;
706 int topX = ((x + sx) >> 3) & 0x1F;
707 int bgTile;
708 if (GBRegisterLCDCIsTileData(renderer->lcdc)) {
709 bgTile = maps[topX + topY];
710 } else {
711 bgTile = ((int8_t*) maps)[topX + topY];
712 }
713 int p = 0;
714 if (renderer->model >= GB_MODEL_CGB) {
715 GBObjAttributes attrs = attr[topX + topY];
716 p = GBObjAttributesGetCGBPalette(attrs) * 4;
717 if (GBObjAttributesIsPriority(attrs) && GBRegisterLCDCIsBgEnable(renderer->lcdc)) {
718 p |= 0x80;
719 }
720 if (GBObjAttributesIsBank(attrs)) {
721 localData += GB_SIZE_VRAM_BANK0;
722 }
723 if (GBObjAttributesIsYFlip(attrs)) {
724 localY = 7 - bottomY;
725 }
726 if (GBObjAttributesIsXFlip(attrs)) {
727 uint8_t tileDataLower = localData[(bgTile * 8 + localY) * 2];
728 uint8_t tileDataUpper = localData[(bgTile * 8 + localY) * 2 + 1];
729 renderer->row[x + 0] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
730 renderer->row[x + 1] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
731 renderer->row[x + 2] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
732 renderer->row[x + 3] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
733 renderer->row[x + 4] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
734 renderer->row[x + 5] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
735 renderer->row[x + 6] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
736 renderer->row[x + 7] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
737 continue;
738 }
739 }
740 uint8_t tileDataLower = localData[(bgTile * 8 + localY) * 2];
741 uint8_t tileDataUpper = localData[(bgTile * 8 + localY) * 2 + 1];
742 renderer->row[x + 7] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
743 renderer->row[x + 6] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
744 renderer->row[x + 5] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
745 renderer->row[x + 4] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
746 renderer->row[x + 3] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
747 renderer->row[x + 2] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
748 renderer->row[x + 1] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
749 renderer->row[x + 0] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
750 }
751}
752
753static void GBVideoSoftwareRendererDrawObj(struct GBVideoSoftwareRenderer* renderer, struct GBObj* obj, int startX, int endX, int y) {
754 int ix = obj->x - 8;
755 if (endX < ix || startX >= ix + 8) {
756 return;
757 }
758 if (obj->x < endX) {
759 endX = obj->x;
760 }
761 if (obj->x - 8 > startX) {
762 startX = obj->x - 8;
763 }
764 if (startX < 0) {
765 startX = 0;
766 }
767 uint8_t* data = renderer->d.vram;
768 int tileOffset = 0;
769 int bottomY;
770 if (GBObjAttributesIsYFlip(obj->attr)) {
771 bottomY = 7 - ((y - obj->y - 16) & 7);
772 if (GBRegisterLCDCIsObjSize(renderer->lcdc) && y - obj->y < -8) {
773 ++tileOffset;
774 }
775 } else {
776 bottomY = (y - obj->y - 16) & 7;
777 if (GBRegisterLCDCIsObjSize(renderer->lcdc) && y - obj->y >= -8) {
778 ++tileOffset;
779 }
780 }
781 if (GBRegisterLCDCIsObjSize(renderer->lcdc) && obj->tile & 1) {
782 --tileOffset;
783 }
784 uint8_t mask = GBObjAttributesIsPriority(obj->attr) ? 0x63 : 0x60;
785 uint8_t mask2 = GBObjAttributesIsPriority(obj->attr) ? 0 : 0x83;
786 int p;
787 if (renderer->model >= GB_MODEL_CGB) {
788 p = (GBObjAttributesGetCGBPalette(obj->attr) + 8) * 4;
789 if (GBObjAttributesIsBank(obj->attr)) {
790 data += GB_SIZE_VRAM_BANK0;
791 }
792 if (!GBRegisterLCDCIsBgEnable(renderer->lcdc)) {
793 mask = 0x60;
794 mask2 = 0x83;
795 }
796 } else {
797 p = (GBObjAttributesGetPalette(obj->attr) + 8) * 4;
798 }
799 int bottomX;
800 int x = startX;
801 if ((x - obj->x) & 7) {
802 for (; x < endX; ++x) {
803 if (GBObjAttributesIsXFlip(obj->attr)) {
804 bottomX = (x - obj->x) & 7;
805 } else {
806 bottomX = 7 - ((x - obj->x) & 7);
807 }
808 int objTile = obj->tile + tileOffset;
809 uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
810 uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
811 tileDataUpper >>= bottomX;
812 tileDataLower >>= bottomX;
813 color_t current = renderer->row[x];
814 if (((tileDataUpper | tileDataLower) & 1) && !(current & mask) && (current & mask2) <= 0x80) {
815 renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
816 }
817 }
818 } else if (GBObjAttributesIsXFlip(obj->attr)) {
819 int objTile = obj->tile + tileOffset;
820 uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
821 uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
822 color_t current;
823 current = renderer->row[x];
824 if (((tileDataUpper | tileDataLower) & 1) && !(current & mask) && (current & mask2) <= 0x80) {
825 renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
826 }
827 current = renderer->row[x + 1];
828 if (((tileDataUpper | tileDataLower) & 2) && !(current & mask) && (current & mask2) <= 0x80) {
829 renderer->row[x + 1] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
830 }
831 current = renderer->row[x + 2];
832 if (((tileDataUpper | tileDataLower) & 4) && !(current & mask) && (current & mask2) <= 0x80) {
833 renderer->row[x + 2] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
834 }
835 current = renderer->row[x + 3];
836 if (((tileDataUpper | tileDataLower) & 8) && !(current & mask) && (current & mask2) <= 0x80) {
837 renderer->row[x + 3] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
838 }
839 current = renderer->row[x + 4];
840 if (((tileDataUpper | tileDataLower) & 16) && !(current & mask) && (current & mask2) <= 0x80) {
841 renderer->row[x + 4] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
842 }
843 current = renderer->row[x + 5];
844 if (((tileDataUpper | tileDataLower) & 32) && !(current & mask) && (current & mask2) <= 0x80) {
845 renderer->row[x + 5] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
846 }
847 current = renderer->row[x + 6];
848 if (((tileDataUpper | tileDataLower) & 64) && !(current & mask) && (current & mask2) <= 0x80) {
849 renderer->row[x + 6] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
850 }
851 current = renderer->row[x + 7];
852 if (((tileDataUpper | tileDataLower) & 128) && !(current & mask) && (current & mask2) <= 0x80) {
853 renderer->row[x + 7] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
854 }
855 } else {
856 int objTile = obj->tile + tileOffset;
857 uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
858 uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
859 color_t current;
860 current = renderer->row[x + 7];
861 if (((tileDataUpper | tileDataLower) & 1) && !(current & mask) && (current & mask2) <= 0x80) {
862 renderer->row[x + 7] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
863 }
864 current = renderer->row[x + 6];
865 if (((tileDataUpper | tileDataLower) & 2) && !(current & mask) && (current & mask2) <= 0x80) {
866 renderer->row[x + 6] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
867 }
868 current = renderer->row[x + 5];
869 if (((tileDataUpper | tileDataLower) & 4) && !(current & mask) && (current & mask2) <= 0x80) {
870 renderer->row[x + 5] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
871 }
872 current = renderer->row[x + 4];
873 if (((tileDataUpper | tileDataLower) & 8) && !(current & mask) && (current & mask2) <= 0x80) {
874 renderer->row[x + 4] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
875 }
876 current = renderer->row[x + 3];
877 if (((tileDataUpper | tileDataLower) & 16) && !(current & mask) && (current & mask2) <= 0x80) {
878 renderer->row[x + 3] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
879 }
880 current = renderer->row[x + 2];
881 if (((tileDataUpper | tileDataLower) & 32) && !(current & mask) && (current & mask2) <= 0x80) {
882 renderer->row[x + 2] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
883 }
884 current = renderer->row[x + 1];
885 if (((tileDataUpper | tileDataLower) & 64) && !(current & mask) && (current & mask2) <= 0x80) {
886 renderer->row[x + 1] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
887 }
888 current = renderer->row[x];
889 if (((tileDataUpper | tileDataLower) & 128) && !(current & mask) && (current & mask2) <= 0x80) {
890 renderer->row[x] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
891 }
892 }
893}
894
895static void GBVideoSoftwareRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels) {
896 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
897 *stride = softwareRenderer->outputBufferStride;
898 *pixels = softwareRenderer->outputBuffer;
899}
900
901static void GBVideoSoftwareRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels) {
902 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
903 // TODO: Share with GBAVideoSoftwareRendererGetPixels
904
905 const color_t* colorPixels = pixels;
906 unsigned i;
907 for (i = 0; i < GB_VIDEO_VERTICAL_PIXELS; ++i) {
908 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], GB_VIDEO_HORIZONTAL_PIXELS * BYTES_PER_PIXEL);
909 }
910}