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
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 + 1 - 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_ATRC_EN:
307 if (softwareRenderer->sgbBorders) {
308 _regenerateSGBBorder(softwareRenderer);
309 }
310 break;
311 }
312}
313
314static void GBVideoSoftwareRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value) {
315 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
316 color_t color = mColorFrom555(value);
317 softwareRenderer->palette[index] = color;
318 if (renderer->cache) {
319 mCacheSetWritePalette(renderer->cache, index, color);
320 }
321}
322
323static void GBVideoSoftwareRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address) {
324 if (renderer->cache) {
325 mCacheSetWriteVRAM(renderer->cache, address);
326 }
327}
328
329static void GBVideoSoftwareRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam) {
330 UNUSED(renderer);
331 UNUSED(oam);
332 // Nothing to do
333}
334
335static void GBVideoSoftwareRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax) {
336 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
337 softwareRenderer->lastY = y;
338 uint8_t* maps = &softwareRenderer->d.vram[GB_BASE_MAP];
339 if (GBRegisterLCDCIsTileMap(softwareRenderer->lcdc)) {
340 maps += GB_SIZE_MAP;
341 }
342 if (softwareRenderer->d.disableBG) {
343 memset(&softwareRenderer->row[startX], 0, endX - startX);
344 }
345 if (GBRegisterLCDCIsBgEnable(softwareRenderer->lcdc) || softwareRenderer->model >= GB_MODEL_CGB) {
346 int wy = softwareRenderer->wy + softwareRenderer->currentWy;
347 if (GBRegisterLCDCIsWindow(softwareRenderer->lcdc) && wy <= y && endX >= softwareRenderer->wx - 7) {
348 if (softwareRenderer->wx - 7 > 0 && !softwareRenderer->d.disableBG) {
349 GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, startX, softwareRenderer->wx - 7, softwareRenderer->scx, softwareRenderer->scy + y);
350 }
351
352 maps = &softwareRenderer->d.vram[GB_BASE_MAP];
353 if (GBRegisterLCDCIsWindowTileMap(softwareRenderer->lcdc)) {
354 maps += GB_SIZE_MAP;
355 }
356 if (!softwareRenderer->d.disableWIN) {
357 GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, softwareRenderer->wx - 7, endX, 7 - softwareRenderer->wx, y - wy);
358 }
359 } else if (!softwareRenderer->d.disableBG) {
360 GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, startX, endX, softwareRenderer->scx, softwareRenderer->scy + y);
361 }
362 } else if (!softwareRenderer->d.disableBG) {
363 memset(&softwareRenderer->row[startX], 0, endX - startX);
364 }
365
366 if (GBRegisterLCDCIsObjEnable(softwareRenderer->lcdc) && !softwareRenderer->d.disableOBJ) {
367 size_t i;
368 for (i = 0; i < oamMax; ++i) {
369 GBVideoSoftwareRendererDrawObj(softwareRenderer, &obj[i], startX, endX, y);
370 }
371 }
372
373 size_t sgbOffset = 0;
374 if (softwareRenderer->model == GB_MODEL_SGB && softwareRenderer->sgbBorders) {
375 sgbOffset = softwareRenderer->outputBufferStride * 40 + 48;
376 }
377 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y + sgbOffset];
378 int x = startX;
379 int p = 0;
380 switch (softwareRenderer->d.sgbRenderMode) {
381 case 0:
382 if (softwareRenderer->model == GB_MODEL_SGB) {
383 p = softwareRenderer->d.sgbAttributes[(startX >> 5) + 5 * (y >> 3)];
384 p >>= 6 - ((x / 4) & 0x6);
385 p &= 3;
386 p <<= 2;
387 }
388 for (; x < ((startX + 7) & ~7) && x < endX; ++x) {
389 row[x] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x] & 0x7F]];
390 }
391 for (; x + 7 < (endX & ~7); x += 8) {
392 if (softwareRenderer->model == GB_MODEL_SGB) {
393 p = softwareRenderer->d.sgbAttributes[(x >> 5) + 5 * (y >> 3)];
394 p >>= 6 - ((x / 4) & 0x6);
395 p &= 3;
396 p <<= 2;
397 }
398 row[x + 0] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x] & 0x7F]];
399 row[x + 1] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 1] & 0x7F]];
400 row[x + 2] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 2] & 0x7F]];
401 row[x + 3] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 3] & 0x7F]];
402 row[x + 4] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 4] & 0x7F]];
403 row[x + 5] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 5] & 0x7F]];
404 row[x + 6] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 6] & 0x7F]];
405 row[x + 7] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 7] & 0x7F]];
406 }
407 if (softwareRenderer->model == GB_MODEL_SGB) {
408 p = softwareRenderer->d.sgbAttributes[(x >> 5) + 5 * (y >> 3)];
409 p >>= 6 - ((x / 4) & 0x6);
410 p &= 3;
411 p <<= 2;
412 }
413 for (; x < endX; ++x) {
414 row[x] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x] & 0x7F]];
415 }
416 break;
417 case 1:
418 break;
419 case 2:
420 for (; x < ((startX + 7) & ~7) && x < endX; ++x) {
421 row[x] = 0;
422 }
423 for (; x + 7 < (endX & ~7); x += 8) {
424 row[x] = 0;
425 row[x + 1] = 0;
426 row[x + 2] = 0;
427 row[x + 3] = 0;
428 row[x + 4] = 0;
429 row[x + 5] = 0;
430 row[x + 6] = 0;
431 row[x + 7] = 0;
432 }
433 for (; x < endX; ++x) {
434 row[x] = 0;
435 }
436 break;
437 case 3:
438 for (; x < ((startX + 7) & ~7) && x < endX; ++x) {
439 row[x] = softwareRenderer->palette[0];
440 }
441 for (; x + 7 < (endX & ~7); x += 8) {
442 row[x] = softwareRenderer->palette[0];
443 row[x + 1] = softwareRenderer->palette[0];
444 row[x + 2] = softwareRenderer->palette[0];
445 row[x + 3] = softwareRenderer->palette[0];
446 row[x + 4] = softwareRenderer->palette[0];
447 row[x + 5] = softwareRenderer->palette[0];
448 row[x + 6] = softwareRenderer->palette[0];
449 row[x + 7] = softwareRenderer->palette[0];
450 }
451 for (; x < endX; ++x) {
452 row[x] = softwareRenderer->palette[0];
453 }
454 break;
455 }
456}
457
458static void GBVideoSoftwareRendererFinishScanline(struct GBVideoRenderer* renderer, int y) {
459 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
460
461 if (softwareRenderer->sgbTransfer == 1) {
462 size_t offset = 2 * ((y & 7) + (y >> 3) * GB_VIDEO_HORIZONTAL_PIXELS);
463 if (offset >= 0x1000) {
464 return;
465 }
466 uint8_t* buffer = NULL;
467 switch (softwareRenderer->sgbCommandHeader >> 3) {
468 case SGB_PAL_TRN:
469 buffer = renderer->sgbPalRam;
470 break;
471 case SGB_CHR_TRN:
472 buffer = &renderer->sgbCharRam[SGB_SIZE_CHAR_RAM / 2 * (softwareRenderer->sgbPacket[1] & 1)];
473 break;
474 case SGB_PCT_TRN:
475 buffer = renderer->sgbMapRam;
476 break;
477 case SGB_ATTR_TRN:
478 buffer = renderer->sgbAttributeFiles;
479 break;
480 default:
481 break;
482 }
483 if (buffer) {
484 int i;
485 for (i = 0; i < GB_VIDEO_HORIZONTAL_PIXELS; i += 8) {
486 if (UNLIKELY(offset + (i << 1) + 1 >= 0x1000)) {
487 break;
488 }
489 uint8_t hi = 0;
490 uint8_t lo = 0;
491 hi |= (softwareRenderer->row[i + 0] & 0x2) << 6;
492 lo |= (softwareRenderer->row[i + 0] & 0x1) << 7;
493 hi |= (softwareRenderer->row[i + 1] & 0x2) << 5;
494 lo |= (softwareRenderer->row[i + 1] & 0x1) << 6;
495 hi |= (softwareRenderer->row[i + 2] & 0x2) << 4;
496 lo |= (softwareRenderer->row[i + 2] & 0x1) << 5;
497 hi |= (softwareRenderer->row[i + 3] & 0x2) << 3;
498 lo |= (softwareRenderer->row[i + 3] & 0x1) << 4;
499 hi |= (softwareRenderer->row[i + 4] & 0x2) << 2;
500 lo |= (softwareRenderer->row[i + 4] & 0x1) << 3;
501 hi |= (softwareRenderer->row[i + 5] & 0x2) << 1;
502 lo |= (softwareRenderer->row[i + 5] & 0x1) << 2;
503 hi |= (softwareRenderer->row[i + 6] & 0x2) << 0;
504 lo |= (softwareRenderer->row[i + 6] & 0x1) << 1;
505 hi |= (softwareRenderer->row[i + 7] & 0x2) >> 1;
506 lo |= (softwareRenderer->row[i + 7] & 0x1) >> 0;
507 buffer[offset + (i << 1) + 0] = lo;
508 buffer[offset + (i << 1) + 1] = hi;
509 }
510 }
511 }
512}
513
514static void GBVideoSoftwareRendererFinishFrame(struct GBVideoRenderer* renderer) {
515 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
516
517 if (softwareRenderer->temporaryBuffer) {
518 mappedMemoryFree(softwareRenderer->temporaryBuffer, GB_VIDEO_HORIZONTAL_PIXELS * GB_VIDEO_VERTICAL_PIXELS * 4);
519 softwareRenderer->temporaryBuffer = 0;
520 }
521 if (!GBRegisterLCDCIsEnable(softwareRenderer->lcdc)) {
522 _clearScreen(softwareRenderer);
523 }
524 if (softwareRenderer->model == GB_MODEL_SGB) {
525 switch (softwareRenderer->sgbCommandHeader >> 3) {
526 case SGB_PAL_SET:
527 case SGB_ATTR_SET:
528 if (softwareRenderer->sgbPacket[1] & 0x40) {
529 renderer->sgbRenderMode = 0;
530 }
531 break;
532 case SGB_PAL_TRN:
533 case SGB_CHR_TRN:
534 case SGB_PCT_TRN:
535 if (softwareRenderer->sgbTransfer > 0 && softwareRenderer->sgbBorders) {
536 // Make sure every buffer sees this if we're multibuffering
537 _regenerateSGBBorder(softwareRenderer);
538 }
539 // Fall through
540 case SGB_ATTR_TRN:
541 ++softwareRenderer->sgbTransfer;
542 if (softwareRenderer->sgbTransfer == 5) {
543 softwareRenderer->sgbCommandHeader = 0;
544 }
545 break;
546 default:
547 break;
548 }
549 }
550 softwareRenderer->lastY = GB_VIDEO_VERTICAL_PIXELS;
551 softwareRenderer->currentWy = 0;
552 softwareRenderer->hasWindow = false;
553}
554
555static void GBVideoSoftwareRendererDrawBackground(struct GBVideoSoftwareRenderer* renderer, uint8_t* maps, int startX, int endX, int sx, int sy) {
556 uint8_t* data = renderer->d.vram;
557 uint8_t* attr = &maps[GB_SIZE_VRAM_BANK0];
558 if (!GBRegisterLCDCIsTileData(renderer->lcdc)) {
559 data += 0x1000;
560 }
561 int topY = ((sy >> 3) & 0x1F) * 0x20;
562 int bottomY = sy & 7;
563 if (startX < 0) {
564 startX = 0;
565 }
566 int x;
567 if ((startX + sx) & 7) {
568 int startX2 = startX + 8 - ((startX + sx) & 7);
569 for (x = startX; x < startX2; ++x) {
570 uint8_t* localData = data;
571 int localY = bottomY;
572 int topX = ((x + sx) >> 3) & 0x1F;
573 int bottomX = 7 - ((x + sx) & 7);
574 int bgTile;
575 if (GBRegisterLCDCIsTileData(renderer->lcdc)) {
576 bgTile = maps[topX + topY];
577 } else {
578 bgTile = ((int8_t*) maps)[topX + topY];
579 }
580 int p = 0;
581 if (renderer->model >= GB_MODEL_CGB) {
582 GBObjAttributes attrs = attr[topX + topY];
583 p = GBObjAttributesGetCGBPalette(attrs) * 4;
584 if (GBObjAttributesIsPriority(attrs) && GBRegisterLCDCIsBgEnable(renderer->lcdc)) {
585 p |= 0x80;
586 }
587 if (GBObjAttributesIsBank(attrs)) {
588 localData += GB_SIZE_VRAM_BANK0;
589 }
590 if (GBObjAttributesIsYFlip(attrs)) {
591 localY = 7 - bottomY;
592 }
593 if (GBObjAttributesIsXFlip(attrs)) {
594 bottomX = 7 - bottomX;
595 }
596 }
597 uint8_t tileDataLower = localData[(bgTile * 8 + localY) * 2];
598 uint8_t tileDataUpper = localData[(bgTile * 8 + localY) * 2 + 1];
599 tileDataUpper >>= bottomX;
600 tileDataLower >>= bottomX;
601 renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
602 }
603 startX = startX2;
604 }
605 for (x = startX; x < endX; x += 8) {
606 uint8_t* localData = data;
607 int localY = bottomY;
608 int topX = ((x + sx) >> 3) & 0x1F;
609 int bgTile;
610 if (GBRegisterLCDCIsTileData(renderer->lcdc)) {
611 bgTile = maps[topX + topY];
612 } else {
613 bgTile = ((int8_t*) maps)[topX + topY];
614 }
615 int p = 0;
616 if (renderer->model >= GB_MODEL_CGB) {
617 GBObjAttributes attrs = attr[topX + topY];
618 p = GBObjAttributesGetCGBPalette(attrs) * 4;
619 if (GBObjAttributesIsPriority(attrs) && GBRegisterLCDCIsBgEnable(renderer->lcdc)) {
620 p |= 0x80;
621 }
622 if (GBObjAttributesIsBank(attrs)) {
623 localData += GB_SIZE_VRAM_BANK0;
624 }
625 if (GBObjAttributesIsYFlip(attrs)) {
626 localY = 7 - bottomY;
627 }
628 if (GBObjAttributesIsXFlip(attrs)) {
629 uint8_t tileDataLower = localData[(bgTile * 8 + localY) * 2];
630 uint8_t tileDataUpper = localData[(bgTile * 8 + localY) * 2 + 1];
631 renderer->row[x + 0] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
632 renderer->row[x + 1] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
633 renderer->row[x + 2] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
634 renderer->row[x + 3] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
635 renderer->row[x + 4] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
636 renderer->row[x + 5] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
637 renderer->row[x + 6] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
638 renderer->row[x + 7] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
639 continue;
640 }
641 }
642 uint8_t tileDataLower = localData[(bgTile * 8 + localY) * 2];
643 uint8_t tileDataUpper = localData[(bgTile * 8 + localY) * 2 + 1];
644 renderer->row[x + 7] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
645 renderer->row[x + 6] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
646 renderer->row[x + 5] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
647 renderer->row[x + 4] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
648 renderer->row[x + 3] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
649 renderer->row[x + 2] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
650 renderer->row[x + 1] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
651 renderer->row[x + 0] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
652 }
653}
654
655static void GBVideoSoftwareRendererDrawObj(struct GBVideoSoftwareRenderer* renderer, struct GBObj* obj, int startX, int endX, int y) {
656 int ix = obj->x - 8;
657 if (endX < ix || startX >= ix + 8) {
658 return;
659 }
660 if (obj->x < endX) {
661 endX = obj->x;
662 }
663 if (obj->x - 8 > startX) {
664 startX = obj->x - 8;
665 }
666 if (startX < 0) {
667 startX = 0;
668 }
669 uint8_t* data = renderer->d.vram;
670 int tileOffset = 0;
671 int bottomY;
672 if (GBObjAttributesIsYFlip(obj->attr)) {
673 bottomY = 7 - ((y - obj->y - 16) & 7);
674 if (GBRegisterLCDCIsObjSize(renderer->lcdc) && y - obj->y < -8) {
675 ++tileOffset;
676 }
677 } else {
678 bottomY = (y - obj->y - 16) & 7;
679 if (GBRegisterLCDCIsObjSize(renderer->lcdc) && y - obj->y >= -8) {
680 ++tileOffset;
681 }
682 }
683 if (GBRegisterLCDCIsObjSize(renderer->lcdc) && obj->tile & 1) {
684 --tileOffset;
685 }
686 uint8_t mask = GBObjAttributesIsPriority(obj->attr) ? 0x63 : 0x60;
687 uint8_t mask2 = GBObjAttributesIsPriority(obj->attr) ? 0 : 0x83;
688 int p;
689 if (renderer->model >= GB_MODEL_CGB) {
690 p = (GBObjAttributesGetCGBPalette(obj->attr) + 8) * 4;
691 if (GBObjAttributesIsBank(obj->attr)) {
692 data += GB_SIZE_VRAM_BANK0;
693 }
694 if (!GBRegisterLCDCIsBgEnable(renderer->lcdc)) {
695 mask = 0x60;
696 mask2 = 0x83;
697 }
698 } else {
699 p = (GBObjAttributesGetPalette(obj->attr) + 8) * 4;
700 }
701 int bottomX;
702 int x = startX;
703 if ((x - obj->x) & 7) {
704 for (; x < endX; ++x) {
705 if (GBObjAttributesIsXFlip(obj->attr)) {
706 bottomX = (x - obj->x) & 7;
707 } else {
708 bottomX = 7 - ((x - obj->x) & 7);
709 }
710 int objTile = obj->tile + tileOffset;
711 uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
712 uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
713 tileDataUpper >>= bottomX;
714 tileDataLower >>= bottomX;
715 color_t current = renderer->row[x];
716 if (((tileDataUpper | tileDataLower) & 1) && !(current & mask) && (current & mask2) <= 0x80) {
717 renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
718 }
719 }
720 } else if (GBObjAttributesIsXFlip(obj->attr)) {
721 int objTile = obj->tile + tileOffset;
722 uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
723 uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
724 color_t current;
725 current = renderer->row[x];
726 if (((tileDataUpper | tileDataLower) & 1) && !(current & mask) && (current & mask2) <= 0x80) {
727 renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
728 }
729 current = renderer->row[x + 1];
730 if (((tileDataUpper | tileDataLower) & 2) && !(current & mask) && (current & mask2) <= 0x80) {
731 renderer->row[x + 1] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
732 }
733 current = renderer->row[x + 2];
734 if (((tileDataUpper | tileDataLower) & 4) && !(current & mask) && (current & mask2) <= 0x80) {
735 renderer->row[x + 2] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
736 }
737 current = renderer->row[x + 3];
738 if (((tileDataUpper | tileDataLower) & 8) && !(current & mask) && (current & mask2) <= 0x80) {
739 renderer->row[x + 3] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
740 }
741 current = renderer->row[x + 4];
742 if (((tileDataUpper | tileDataLower) & 16) && !(current & mask) && (current & mask2) <= 0x80) {
743 renderer->row[x + 4] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
744 }
745 current = renderer->row[x + 5];
746 if (((tileDataUpper | tileDataLower) & 32) && !(current & mask) && (current & mask2) <= 0x80) {
747 renderer->row[x + 5] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
748 }
749 current = renderer->row[x + 6];
750 if (((tileDataUpper | tileDataLower) & 64) && !(current & mask) && (current & mask2) <= 0x80) {
751 renderer->row[x + 6] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
752 }
753 current = renderer->row[x + 7];
754 if (((tileDataUpper | tileDataLower) & 128) && !(current & mask) && (current & mask2) <= 0x80) {
755 renderer->row[x + 7] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
756 }
757 } else {
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 color_t current;
762 current = renderer->row[x + 7];
763 if (((tileDataUpper | tileDataLower) & 1) && !(current & mask) && (current & mask2) <= 0x80) {
764 renderer->row[x + 7] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
765 }
766 current = renderer->row[x + 6];
767 if (((tileDataUpper | tileDataLower) & 2) && !(current & mask) && (current & mask2) <= 0x80) {
768 renderer->row[x + 6] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
769 }
770 current = renderer->row[x + 5];
771 if (((tileDataUpper | tileDataLower) & 4) && !(current & mask) && (current & mask2) <= 0x80) {
772 renderer->row[x + 5] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
773 }
774 current = renderer->row[x + 4];
775 if (((tileDataUpper | tileDataLower) & 8) && !(current & mask) && (current & mask2) <= 0x80) {
776 renderer->row[x + 4] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
777 }
778 current = renderer->row[x + 3];
779 if (((tileDataUpper | tileDataLower) & 16) && !(current & mask) && (current & mask2) <= 0x80) {
780 renderer->row[x + 3] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
781 }
782 current = renderer->row[x + 2];
783 if (((tileDataUpper | tileDataLower) & 32) && !(current & mask) && (current & mask2) <= 0x80) {
784 renderer->row[x + 2] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
785 }
786 current = renderer->row[x + 1];
787 if (((tileDataUpper | tileDataLower) & 64) && !(current & mask) && (current & mask2) <= 0x80) {
788 renderer->row[x + 1] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
789 }
790 current = renderer->row[x];
791 if (((tileDataUpper | tileDataLower) & 128) && !(current & mask) && (current & mask2) <= 0x80) {
792 renderer->row[x] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
793 }
794 }
795}
796
797static void GBVideoSoftwareRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels) {
798 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
799 *stride = softwareRenderer->outputBufferStride;
800 *pixels = softwareRenderer->outputBuffer;
801}
802
803static void GBVideoSoftwareRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels) {
804 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
805 // TODO: Share with GBAVideoSoftwareRendererGetPixels
806
807 const color_t* colorPixels = pixels;
808 unsigned i;
809 for (i = 0; i < GB_VIDEO_VERTICAL_PIXELS; ++i) {
810 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], GB_VIDEO_HORIZONTAL_PIXELS * BYTES_PER_PIXEL);
811 }
812}