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