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 p = SGBBgAttributesGetPalette(mapData) * 0x10;
79 if (SGBBgAttributesIsXFlip(mapData)) {
80 renderer->outputBuffer[base + 0] = renderer->palette[p | ((tileData[0] >> 0) & 0x1) | ((tileData[1] << 1) & 0x2) | ((tileData[2] << 2) & 0x4) | ((tileData[3] << 3) & 0x8)];
81 renderer->outputBuffer[base + 1] = renderer->palette[p | ((tileData[0] >> 1) & 0x1) | ((tileData[1] >> 0) & 0x2) | ((tileData[2] << 1) & 0x4) | ((tileData[3] << 2) & 0x8)];
82 renderer->outputBuffer[base + 2] = renderer->palette[p | ((tileData[0] >> 2) & 0x1) | ((tileData[1] >> 1) & 0x2) | ((tileData[2] >> 0) & 0x4) | ((tileData[3] << 1) & 0x8)];
83 renderer->outputBuffer[base + 3] = renderer->palette[p | ((tileData[0] >> 3) & 0x1) | ((tileData[1] >> 2) & 0x2) | ((tileData[2] >> 1) & 0x4) | ((tileData[3] >> 0) & 0x8)];
84 renderer->outputBuffer[base + 4] = renderer->palette[p | ((tileData[0] >> 4) & 0x1) | ((tileData[1] >> 3) & 0x2) | ((tileData[2] >> 2) & 0x4) | ((tileData[3] >> 1) & 0x8)];
85 renderer->outputBuffer[base + 5] = renderer->palette[p | ((tileData[0] >> 5) & 0x1) | ((tileData[1] >> 4) & 0x2) | ((tileData[2] >> 3) & 0x4) | ((tileData[3] >> 2) & 0x8)];
86 renderer->outputBuffer[base + 6] = renderer->palette[p | ((tileData[0] >> 6) & 0x1) | ((tileData[1] >> 5) & 0x2) | ((tileData[2] >> 4) & 0x4) | ((tileData[3] >> 3) & 0x8)];
87 renderer->outputBuffer[base + 7] = renderer->palette[p | ((tileData[0] >> 7) & 0x1) | ((tileData[1] >> 6) & 0x2) | ((tileData[2] >> 5) & 0x4) | ((tileData[3] >> 4) & 0x8)];
88 } else {
89 renderer->outputBuffer[base + 0] = renderer->palette[p | ((tileData[0] >> 7) & 0x1) | ((tileData[1] >> 6) & 0x2) | ((tileData[2] >> 5) & 0x4) | ((tileData[3] >> 4) & 0x8)];
90 renderer->outputBuffer[base + 1] = renderer->palette[p | ((tileData[0] >> 6) & 0x1) | ((tileData[1] >> 5) & 0x2) | ((tileData[2] >> 4) & 0x4) | ((tileData[3] >> 3) & 0x8)];
91 renderer->outputBuffer[base + 2] = renderer->palette[p | ((tileData[0] >> 5) & 0x1) | ((tileData[1] >> 4) & 0x2) | ((tileData[2] >> 3) & 0x4) | ((tileData[3] >> 2) & 0x8)];
92 renderer->outputBuffer[base + 3] = renderer->palette[p | ((tileData[0] >> 4) & 0x1) | ((tileData[1] >> 3) & 0x2) | ((tileData[2] >> 2) & 0x4) | ((tileData[3] >> 1) & 0x8)];
93 renderer->outputBuffer[base + 4] = renderer->palette[p | ((tileData[0] >> 3) & 0x1) | ((tileData[1] >> 2) & 0x2) | ((tileData[2] >> 1) & 0x4) | ((tileData[3] >> 0) & 0x8)];
94 renderer->outputBuffer[base + 5] = renderer->palette[p | ((tileData[0] >> 2) & 0x1) | ((tileData[1] >> 1) & 0x2) | ((tileData[2] >> 0) & 0x4) | ((tileData[3] << 1) & 0x8)];
95 renderer->outputBuffer[base + 6] = renderer->palette[p | ((tileData[0] >> 1) & 0x1) | ((tileData[1] >> 0) & 0x2) | ((tileData[2] << 1) & 0x4) | ((tileData[3] << 2) & 0x8)];
96 renderer->outputBuffer[base + 7] = renderer->palette[p | ((tileData[0] >> 0) & 0x1) | ((tileData[1] << 1) & 0x2) | ((tileData[2] << 2) & 0x4) | ((tileData[3] << 3) & 0x8)];
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
149void GBVideoSoftwareRendererCreate(struct GBVideoSoftwareRenderer* renderer) {
150 renderer->d.init = GBVideoSoftwareRendererInit;
151 renderer->d.deinit = GBVideoSoftwareRendererDeinit;
152 renderer->d.writeVideoRegister = GBVideoSoftwareRendererWriteVideoRegister;
153 renderer->d.writeSGBPacket = GBVideoSoftwareRendererWriteSGBPacket;
154 renderer->d.writePalette = GBVideoSoftwareRendererWritePalette;
155 renderer->d.writeVRAM = GBVideoSoftwareRendererWriteVRAM;
156 renderer->d.writeOAM = GBVideoSoftwareRendererWriteOAM;
157 renderer->d.drawRange = GBVideoSoftwareRendererDrawRange;
158 renderer->d.finishScanline = GBVideoSoftwareRendererFinishScanline;
159 renderer->d.finishFrame = GBVideoSoftwareRendererFinishFrame;
160 renderer->d.getPixels = GBVideoSoftwareRendererGetPixels;
161 renderer->d.putPixels = GBVideoSoftwareRendererPutPixels;
162
163 renderer->d.disableBG = false;
164 renderer->d.disableOBJ = false;
165 renderer->d.disableWIN = false;
166
167 renderer->temporaryBuffer = 0;
168}
169
170static void GBVideoSoftwareRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool sgbBorders) {
171 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
172 softwareRenderer->lcdc = 0;
173 softwareRenderer->scy = 0;
174 softwareRenderer->scx = 0;
175 softwareRenderer->wy = 0;
176 softwareRenderer->currentWy = 0;
177 softwareRenderer->wx = 0;
178 softwareRenderer->model = model;
179 softwareRenderer->sgbTransfer = 0;
180 softwareRenderer->sgbCommandHeader = 0;
181 softwareRenderer->sgbBorders = sgbBorders;
182 int i;
183 for (i = 0; i < 64; ++i) {
184 softwareRenderer->lookup[i] = i;
185 softwareRenderer->lookup[i] = i;
186 softwareRenderer->lookup[i] = i;
187 softwareRenderer->lookup[i] = i;
188 }
189}
190
191static void GBVideoSoftwareRendererDeinit(struct GBVideoRenderer* renderer) {
192 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
193 UNUSED(softwareRenderer);
194}
195
196static uint8_t GBVideoSoftwareRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value) {
197 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
198 if (renderer->cache) {
199 GBVideoCacheWriteVideoRegister(renderer->cache, address, value);
200 }
201 switch (address) {
202 case REG_LCDC:
203 softwareRenderer->lcdc = value;
204 break;
205 case REG_SCY:
206 softwareRenderer->scy = value;
207 break;
208 case REG_SCX:
209 softwareRenderer->scx = value;
210 break;
211 case REG_WY:
212 softwareRenderer->wy = value;
213 break;
214 case REG_WX:
215 softwareRenderer->wx = value;
216 break;
217 case REG_BGP:
218 softwareRenderer->lookup[0] = value & 3;
219 softwareRenderer->lookup[1] = (value >> 2) & 3;
220 softwareRenderer->lookup[2] = (value >> 4) & 3;
221 softwareRenderer->lookup[3] = (value >> 6) & 3;
222 break;
223 case REG_OBP0:
224 softwareRenderer->lookup[0x20 + 0] = value & 3;
225 softwareRenderer->lookup[0x20 + 1] = (value >> 2) & 3;
226 softwareRenderer->lookup[0x20 + 2] = (value >> 4) & 3;
227 softwareRenderer->lookup[0x20 + 3] = (value >> 6) & 3;
228 break;
229 case REG_OBP1:
230 softwareRenderer->lookup[0x24 + 0] = value & 3;
231 softwareRenderer->lookup[0x24 + 1] = (value >> 2) & 3;
232 softwareRenderer->lookup[0x24 + 2] = (value >> 4) & 3;
233 softwareRenderer->lookup[0x24 + 3] = (value >> 6) & 3;
234 break;
235 }
236 return value;
237}
238
239static void GBVideoSoftwareRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data) {
240 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
241 memcpy(softwareRenderer->sgbPacket, data, sizeof(softwareRenderer->sgbPacket));
242 int i;
243 if (!(softwareRenderer->sgbCommandHeader & 7)) {
244 softwareRenderer->sgbCommandHeader = data[0];
245 softwareRenderer->sgbPacketId = 0;
246 softwareRenderer->sgbTransfer = 0;
247 }
248 --softwareRenderer->sgbCommandHeader;
249 ++softwareRenderer->sgbPacketId;
250 int set;
251 switch (softwareRenderer->sgbCommandHeader >> 3) {
252 case SGB_PAL_SET:
253 softwareRenderer->sgbPacket[1] = data[9];
254 if (!(data[9] & 0x80)) {
255 break;
256 }
257 // Fall through
258 case SGB_ATTR_SET:
259 set = softwareRenderer->sgbPacket[1] & 0x3F;
260 if (set <= 0x2C) {
261 memcpy(renderer->sgbAttributes, &renderer->sgbAttributeFiles[set * 90], 90);
262 }
263 break;
264 case SGB_ATTR_BLK:
265 if (softwareRenderer->sgbPacketId == 1) {
266 softwareRenderer->sgbDataSets = softwareRenderer->sgbPacket[1];
267 i = 2;
268 } else {
269 i = (9 - softwareRenderer->sgbPacketId) % 3 * -2;
270 }
271 for (; i <= 10 && softwareRenderer->sgbDataSets; i += 6, --softwareRenderer->sgbDataSets) {
272 _parseAttrBlock(softwareRenderer, i);
273 }
274 if (i < 16 && softwareRenderer->sgbDataSets) {
275 memcpy(softwareRenderer->sgbPartialDataSet, &softwareRenderer->sgbPacket[i], 16 - i);
276 }
277 break;
278 case SGB_ATRC_EN:
279 if (softwareRenderer->sgbBorders) {
280 _regenerateSGBBorder(softwareRenderer);
281 }
282 break;
283 }
284}
285
286static void GBVideoSoftwareRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value) {
287 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
288 color_t color = mColorFrom555(value);
289 softwareRenderer->palette[index] = color;
290 if (renderer->cache) {
291 mCacheSetWritePalette(renderer->cache, index, color);
292 }
293}
294
295static void GBVideoSoftwareRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address) {
296 if (renderer->cache) {
297 mCacheSetWriteVRAM(renderer->cache, address);
298 }
299}
300
301static void GBVideoSoftwareRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam) {
302 UNUSED(renderer);
303 UNUSED(oam);
304 // Nothing to do
305}
306
307static void GBVideoSoftwareRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax) {
308 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
309 uint8_t* maps = &softwareRenderer->d.vram[GB_BASE_MAP];
310 if (GBRegisterLCDCIsTileMap(softwareRenderer->lcdc)) {
311 maps += GB_SIZE_MAP;
312 }
313 if (softwareRenderer->d.disableBG) {
314 memset(&softwareRenderer->row[startX], 0, endX - startX);
315 }
316 if (GBRegisterLCDCIsBgEnable(softwareRenderer->lcdc) || softwareRenderer->model >= GB_MODEL_CGB) {
317 if (GBRegisterLCDCIsWindow(softwareRenderer->lcdc) && softwareRenderer->wy <= y && endX >= softwareRenderer->wx - 7) {
318 if (softwareRenderer->wx - 7 > 0 && !softwareRenderer->d.disableBG) {
319 GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, startX, softwareRenderer->wx - 7, softwareRenderer->scx, softwareRenderer->scy + y);
320 }
321
322 maps = &softwareRenderer->d.vram[GB_BASE_MAP];
323 if (GBRegisterLCDCIsWindowTileMap(softwareRenderer->lcdc)) {
324 maps += GB_SIZE_MAP;
325 }
326 if (!softwareRenderer->d.disableWIN) {
327 GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, softwareRenderer->wx - 7, endX, 7 - softwareRenderer->wx, softwareRenderer->currentWy);
328 }
329 } else if (!softwareRenderer->d.disableBG) {
330 GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, startX, endX, softwareRenderer->scx, softwareRenderer->scy + y);
331 }
332 } else if (!softwareRenderer->d.disableBG) {
333 memset(&softwareRenderer->row[startX], 0, endX - startX);
334 }
335
336 if (GBRegisterLCDCIsObjEnable(softwareRenderer->lcdc) && !softwareRenderer->d.disableOBJ) {
337 size_t i;
338 for (i = 0; i < oamMax; ++i) {
339 GBVideoSoftwareRendererDrawObj(softwareRenderer, &obj[i], startX, endX, y);
340 }
341 }
342
343 size_t sgbOffset = 0;
344 if (softwareRenderer->model == GB_MODEL_SGB && softwareRenderer->sgbBorders) {
345 sgbOffset = softwareRenderer->outputBufferStride * 40 + 48;
346 }
347 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y + sgbOffset];
348 int x = startX;
349 int p = 0;
350 switch (softwareRenderer->d.sgbRenderMode) {
351 case 0:
352 if (softwareRenderer->model == GB_MODEL_SGB) {
353 p = softwareRenderer->d.sgbAttributes[(startX >> 5) + 5 * (y >> 3)];
354 p >>= 6 - ((x / 4) & 0x6);
355 p &= 3;
356 p <<= 2;
357 }
358 for (; x < ((startX + 7) & ~7) && x < endX; ++x) {
359 row[x] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x] & 0x7F]];
360 }
361 for (; x + 7 < (endX & ~7); x += 8) {
362 if (softwareRenderer->model == GB_MODEL_SGB) {
363 p = softwareRenderer->d.sgbAttributes[(x >> 5) + 5 * (y >> 3)];
364 p >>= 6 - ((x / 4) & 0x6);
365 p &= 3;
366 p <<= 2;
367 }
368 row[x + 0] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x] & 0x7F]];
369 row[x + 1] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 1] & 0x7F]];
370 row[x + 2] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 2] & 0x7F]];
371 row[x + 3] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 3] & 0x7F]];
372 row[x + 4] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 4] & 0x7F]];
373 row[x + 5] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 5] & 0x7F]];
374 row[x + 6] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 6] & 0x7F]];
375 row[x + 7] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 7] & 0x7F]];
376 }
377 if (softwareRenderer->model == GB_MODEL_SGB) {
378 p = softwareRenderer->d.sgbAttributes[(x >> 5) + 5 * (y >> 3)];
379 p >>= 6 - ((x / 4) & 0x6);
380 p &= 3;
381 p <<= 2;
382 }
383 for (; x < endX; ++x) {
384 row[x] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x] & 0x7F]];
385 }
386 break;
387 case 1:
388 break;
389 case 2:
390 for (; x < ((startX + 7) & ~7) && x < endX; ++x) {
391 row[x] = 0;
392 }
393 for (; x + 7 < (endX & ~7); x += 8) {
394 row[x] = 0;
395 row[x + 1] = 0;
396 row[x + 2] = 0;
397 row[x + 3] = 0;
398 row[x + 4] = 0;
399 row[x + 5] = 0;
400 row[x + 6] = 0;
401 row[x + 7] = 0;
402 }
403 for (; x < endX; ++x) {
404 row[x] = 0;
405 }
406 break;
407 case 3:
408 for (; x < ((startX + 7) & ~7) && x < endX; ++x) {
409 row[x] = softwareRenderer->palette[0];
410 }
411 for (; x + 7 < (endX & ~7); x += 8) {
412 row[x] = softwareRenderer->palette[0];
413 row[x + 1] = softwareRenderer->palette[0];
414 row[x + 2] = softwareRenderer->palette[0];
415 row[x + 3] = softwareRenderer->palette[0];
416 row[x + 4] = softwareRenderer->palette[0];
417 row[x + 5] = softwareRenderer->palette[0];
418 row[x + 6] = softwareRenderer->palette[0];
419 row[x + 7] = softwareRenderer->palette[0];
420 }
421 for (; x < endX; ++x) {
422 row[x] = softwareRenderer->palette[0];
423 }
424 break;
425 }
426}
427
428static void GBVideoSoftwareRendererFinishScanline(struct GBVideoRenderer* renderer, int y) {
429 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
430
431 if (GBRegisterLCDCIsWindow(softwareRenderer->lcdc) && softwareRenderer->wy <= y && softwareRenderer->wx - 7 < GB_VIDEO_HORIZONTAL_PIXELS) {
432 ++softwareRenderer->currentWy;
433 }
434 if (softwareRenderer->sgbTransfer == 1) {
435 size_t offset = 2 * ((y & 7) + (y >> 3) * GB_VIDEO_HORIZONTAL_PIXELS);
436 if (offset >= 0x1000) {
437 return;
438 }
439 uint8_t* buffer = NULL;
440 switch (softwareRenderer->sgbCommandHeader >> 3) {
441 case SGB_PAL_TRN:
442 buffer = renderer->sgbPalRam;
443 break;
444 case SGB_CHR_TRN:
445 buffer = &renderer->sgbCharRam[SGB_SIZE_CHAR_RAM / 2 * (softwareRenderer->sgbPacket[1] & 1)];
446 break;
447 case SGB_PCT_TRN:
448 buffer = renderer->sgbMapRam;
449 break;
450 case SGB_ATTR_TRN:
451 buffer = renderer->sgbAttributeFiles;
452 break;
453 default:
454 break;
455 }
456 if (buffer) {
457 int i;
458 for (i = 0; i < GB_VIDEO_HORIZONTAL_PIXELS; i += 8) {
459 if (UNLIKELY(offset + (i << 1) + 1 >= 0x1000)) {
460 break;
461 }
462 uint8_t hi = 0;
463 uint8_t lo = 0;
464 hi |= (softwareRenderer->row[i + 0] & 0x2) << 6;
465 lo |= (softwareRenderer->row[i + 0] & 0x1) << 7;
466 hi |= (softwareRenderer->row[i + 1] & 0x2) << 5;
467 lo |= (softwareRenderer->row[i + 1] & 0x1) << 6;
468 hi |= (softwareRenderer->row[i + 2] & 0x2) << 4;
469 lo |= (softwareRenderer->row[i + 2] & 0x1) << 5;
470 hi |= (softwareRenderer->row[i + 3] & 0x2) << 3;
471 lo |= (softwareRenderer->row[i + 3] & 0x1) << 4;
472 hi |= (softwareRenderer->row[i + 4] & 0x2) << 2;
473 lo |= (softwareRenderer->row[i + 4] & 0x1) << 3;
474 hi |= (softwareRenderer->row[i + 5] & 0x2) << 1;
475 lo |= (softwareRenderer->row[i + 5] & 0x1) << 2;
476 hi |= (softwareRenderer->row[i + 6] & 0x2) << 0;
477 lo |= (softwareRenderer->row[i + 6] & 0x1) << 1;
478 hi |= (softwareRenderer->row[i + 7] & 0x2) >> 1;
479 lo |= (softwareRenderer->row[i + 7] & 0x1) >> 0;
480 buffer[offset + (i << 1) + 0] = lo;
481 buffer[offset + (i << 1) + 1] = hi;
482 }
483 }
484 }
485}
486
487static void GBVideoSoftwareRendererFinishFrame(struct GBVideoRenderer* renderer) {
488 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
489
490 if (softwareRenderer->temporaryBuffer) {
491 mappedMemoryFree(softwareRenderer->temporaryBuffer, GB_VIDEO_HORIZONTAL_PIXELS * GB_VIDEO_VERTICAL_PIXELS * 4);
492 softwareRenderer->temporaryBuffer = 0;
493 }
494 if (!GBRegisterLCDCIsEnable(softwareRenderer->lcdc)) {
495 _clearScreen(softwareRenderer);
496 }
497 if (softwareRenderer->model == GB_MODEL_SGB) {
498 switch (softwareRenderer->sgbCommandHeader >> 3) {
499 case SGB_PAL_SET:
500 case SGB_ATTR_SET:
501 if (softwareRenderer->sgbPacket[1] & 0x40) {
502 renderer->sgbRenderMode = 0;
503 }
504 break;
505 case SGB_PAL_TRN:
506 case SGB_CHR_TRN:
507 case SGB_PCT_TRN:
508 if (softwareRenderer->sgbTransfer > 0 && softwareRenderer->sgbBorders) {
509 // Make sure every buffer sees this if we're multibuffering
510 _regenerateSGBBorder(softwareRenderer);
511 }
512 // Fall through
513 case SGB_ATTR_TRN:
514 ++softwareRenderer->sgbTransfer;
515 if (softwareRenderer->sgbTransfer == 5) {
516 softwareRenderer->sgbCommandHeader = 0;
517 }
518 break;
519 default:
520 break;
521 }
522 }
523 softwareRenderer->currentWy = 0;
524}
525
526static void GBVideoSoftwareRendererDrawBackground(struct GBVideoSoftwareRenderer* renderer, uint8_t* maps, int startX, int endX, int sx, int sy) {
527 uint8_t* data = renderer->d.vram;
528 uint8_t* attr = &maps[GB_SIZE_VRAM_BANK0];
529 if (!GBRegisterLCDCIsTileData(renderer->lcdc)) {
530 data += 0x1000;
531 }
532 int topY = ((sy >> 3) & 0x1F) * 0x20;
533 int bottomY = sy & 7;
534 if (startX < 0) {
535 startX = 0;
536 }
537 int x;
538 if ((startX + sx) & 7) {
539 int startX2 = startX + 8 - ((startX + sx) & 7);
540 for (x = startX; x < startX2; ++x) {
541 uint8_t* localData = data;
542 int localY = bottomY;
543 int topX = ((x + sx) >> 3) & 0x1F;
544 int bottomX = 7 - ((x + sx) & 7);
545 int bgTile;
546 if (GBRegisterLCDCIsTileData(renderer->lcdc)) {
547 bgTile = maps[topX + topY];
548 } else {
549 bgTile = ((int8_t*) maps)[topX + topY];
550 }
551 int p = 0;
552 if (renderer->model >= GB_MODEL_CGB) {
553 GBObjAttributes attrs = attr[topX + topY];
554 p = GBObjAttributesGetCGBPalette(attrs) * 4;
555 if (GBObjAttributesIsPriority(attrs) && GBRegisterLCDCIsBgEnable(renderer->lcdc)) {
556 p |= 0x80;
557 }
558 if (GBObjAttributesIsBank(attrs)) {
559 localData += GB_SIZE_VRAM_BANK0;
560 }
561 if (GBObjAttributesIsYFlip(attrs)) {
562 localY = 7 - bottomY;
563 }
564 if (GBObjAttributesIsXFlip(attrs)) {
565 bottomX = 7 - bottomX;
566 }
567 }
568 uint8_t tileDataLower = localData[(bgTile * 8 + localY) * 2];
569 uint8_t tileDataUpper = localData[(bgTile * 8 + localY) * 2 + 1];
570 tileDataUpper >>= bottomX;
571 tileDataLower >>= bottomX;
572 renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
573 }
574 startX = startX2;
575 }
576 for (x = startX; x < endX; x += 8) {
577 uint8_t* localData = data;
578 int localY = bottomY;
579 int topX = ((x + sx) >> 3) & 0x1F;
580 int bgTile;
581 if (GBRegisterLCDCIsTileData(renderer->lcdc)) {
582 bgTile = maps[topX + topY];
583 } else {
584 bgTile = ((int8_t*) maps)[topX + topY];
585 }
586 int p = 0;
587 if (renderer->model >= GB_MODEL_CGB) {
588 GBObjAttributes attrs = attr[topX + topY];
589 p = GBObjAttributesGetCGBPalette(attrs) * 4;
590 if (GBObjAttributesIsPriority(attrs) && GBRegisterLCDCIsBgEnable(renderer->lcdc)) {
591 p |= 0x80;
592 }
593 if (GBObjAttributesIsBank(attrs)) {
594 localData += GB_SIZE_VRAM_BANK0;
595 }
596 if (GBObjAttributesIsYFlip(attrs)) {
597 localY = 7 - bottomY;
598 }
599 if (GBObjAttributesIsXFlip(attrs)) {
600 uint8_t tileDataLower = localData[(bgTile * 8 + localY) * 2];
601 uint8_t tileDataUpper = localData[(bgTile * 8 + localY) * 2 + 1];
602 renderer->row[x + 0] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
603 renderer->row[x + 1] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
604 renderer->row[x + 2] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
605 renderer->row[x + 3] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
606 renderer->row[x + 4] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
607 renderer->row[x + 5] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
608 renderer->row[x + 6] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
609 renderer->row[x + 7] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
610 continue;
611 }
612 }
613 uint8_t tileDataLower = localData[(bgTile * 8 + localY) * 2];
614 uint8_t tileDataUpper = localData[(bgTile * 8 + localY) * 2 + 1];
615 renderer->row[x + 7] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
616 renderer->row[x + 6] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
617 renderer->row[x + 5] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
618 renderer->row[x + 4] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
619 renderer->row[x + 3] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
620 renderer->row[x + 2] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
621 renderer->row[x + 1] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
622 renderer->row[x + 0] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
623 }
624}
625
626static void GBVideoSoftwareRendererDrawObj(struct GBVideoSoftwareRenderer* renderer, struct GBObj* obj, int startX, int endX, int y) {
627 int ix = obj->x - 8;
628 if (endX < ix || startX >= ix + 8) {
629 return;
630 }
631 if (obj->x < endX) {
632 endX = obj->x;
633 }
634 if (obj->x - 8 > startX) {
635 startX = obj->x - 8;
636 }
637 if (startX < 0) {
638 startX = 0;
639 }
640 uint8_t* data = renderer->d.vram;
641 int tileOffset = 0;
642 int bottomY;
643 if (GBObjAttributesIsYFlip(obj->attr)) {
644 bottomY = 7 - ((y - obj->y - 16) & 7);
645 if (GBRegisterLCDCIsObjSize(renderer->lcdc) && y - obj->y < -8) {
646 ++tileOffset;
647 }
648 } else {
649 bottomY = (y - obj->y - 16) & 7;
650 if (GBRegisterLCDCIsObjSize(renderer->lcdc) && y - obj->y >= -8) {
651 ++tileOffset;
652 }
653 }
654 if (GBRegisterLCDCIsObjSize(renderer->lcdc) && obj->tile & 1) {
655 --tileOffset;
656 }
657 uint8_t mask = GBObjAttributesIsPriority(obj->attr) ? 0x63 : 0x60;
658 uint8_t mask2 = GBObjAttributesIsPriority(obj->attr) ? 0 : 0x83;
659 int p;
660 if (renderer->model >= GB_MODEL_CGB) {
661 p = (GBObjAttributesGetCGBPalette(obj->attr) + 8) * 4;
662 if (GBObjAttributesIsBank(obj->attr)) {
663 data += GB_SIZE_VRAM_BANK0;
664 }
665 if (!GBRegisterLCDCIsBgEnable(renderer->lcdc)) {
666 mask = 0x60;
667 mask2 = 0x83;
668 }
669 } else {
670 p = (GBObjAttributesGetPalette(obj->attr) + 8) * 4;
671 }
672 int bottomX;
673 int x = startX;
674 if ((x - obj->x) & 7) {
675 for (; x < endX; ++x) {
676 if (GBObjAttributesIsXFlip(obj->attr)) {
677 bottomX = (x - obj->x) & 7;
678 } else {
679 bottomX = 7 - ((x - obj->x) & 7);
680 }
681 int objTile = obj->tile + tileOffset;
682 uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
683 uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
684 tileDataUpper >>= bottomX;
685 tileDataLower >>= bottomX;
686 color_t current = renderer->row[x];
687 if (((tileDataUpper | tileDataLower) & 1) && !(current & mask) && (current & mask2) <= 0x80) {
688 renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
689 }
690 }
691 } else if (GBObjAttributesIsXFlip(obj->attr)) {
692 int objTile = obj->tile + tileOffset;
693 uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
694 uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
695 color_t current;
696 current = renderer->row[x];
697 if (((tileDataUpper | tileDataLower) & 1) && !(current & mask) && (current & mask2) <= 0x80) {
698 renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
699 }
700 current = renderer->row[x + 1];
701 if (((tileDataUpper | tileDataLower) & 2) && !(current & mask) && (current & mask2) <= 0x80) {
702 renderer->row[x + 1] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
703 }
704 current = renderer->row[x + 2];
705 if (((tileDataUpper | tileDataLower) & 4) && !(current & mask) && (current & mask2) <= 0x80) {
706 renderer->row[x + 2] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
707 }
708 current = renderer->row[x + 3];
709 if (((tileDataUpper | tileDataLower) & 8) && !(current & mask) && (current & mask2) <= 0x80) {
710 renderer->row[x + 3] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
711 }
712 current = renderer->row[x + 4];
713 if (((tileDataUpper | tileDataLower) & 16) && !(current & mask) && (current & mask2) <= 0x80) {
714 renderer->row[x + 4] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
715 }
716 current = renderer->row[x + 5];
717 if (((tileDataUpper | tileDataLower) & 32) && !(current & mask) && (current & mask2) <= 0x80) {
718 renderer->row[x + 5] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
719 }
720 current = renderer->row[x + 6];
721 if (((tileDataUpper | tileDataLower) & 64) && !(current & mask) && (current & mask2) <= 0x80) {
722 renderer->row[x + 6] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
723 }
724 current = renderer->row[x + 7];
725 if (((tileDataUpper | tileDataLower) & 128) && !(current & mask) && (current & mask2) <= 0x80) {
726 renderer->row[x + 7] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
727 }
728 } else {
729 int objTile = obj->tile + tileOffset;
730 uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
731 uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
732 color_t current;
733 current = renderer->row[x + 7];
734 if (((tileDataUpper | tileDataLower) & 1) && !(current & mask) && (current & mask2) <= 0x80) {
735 renderer->row[x + 7] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
736 }
737 current = renderer->row[x + 6];
738 if (((tileDataUpper | tileDataLower) & 2) && !(current & mask) && (current & mask2) <= 0x80) {
739 renderer->row[x + 6] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
740 }
741 current = renderer->row[x + 5];
742 if (((tileDataUpper | tileDataLower) & 4) && !(current & mask) && (current & mask2) <= 0x80) {
743 renderer->row[x + 5] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
744 }
745 current = renderer->row[x + 4];
746 if (((tileDataUpper | tileDataLower) & 8) && !(current & mask) && (current & mask2) <= 0x80) {
747 renderer->row[x + 4] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
748 }
749 current = renderer->row[x + 3];
750 if (((tileDataUpper | tileDataLower) & 16) && !(current & mask) && (current & mask2) <= 0x80) {
751 renderer->row[x + 3] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
752 }
753 current = renderer->row[x + 2];
754 if (((tileDataUpper | tileDataLower) & 32) && !(current & mask) && (current & mask2) <= 0x80) {
755 renderer->row[x + 2] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
756 }
757 current = renderer->row[x + 1];
758 if (((tileDataUpper | tileDataLower) & 64) && !(current & mask) && (current & mask2) <= 0x80) {
759 renderer->row[x + 1] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
760 }
761 current = renderer->row[x];
762 if (((tileDataUpper | tileDataLower) & 128) && !(current & mask) && (current & mask2) <= 0x80) {
763 renderer->row[x] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
764 }
765 }
766}
767
768static void GBVideoSoftwareRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels) {
769 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
770 *stride = softwareRenderer->outputBufferStride;
771 *pixels = softwareRenderer->outputBuffer;
772}
773
774static void GBVideoSoftwareRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels) {
775 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
776 // TODO: Share with GBAVideoSoftwareRendererGetPixels
777
778 const color_t* colorPixels = pixels;
779 unsigned i;
780 for (i = 0; i < GB_VIDEO_VERTICAL_PIXELS; ++i) {
781 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], GB_VIDEO_HORIZONTAL_PIXELS * BYTES_PER_PIXEL);
782 }
783}