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-util/math.h>
11#include <mgba-util/memory.h>
12
13static void GBVideoSoftwareRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool borders);
14static void GBVideoSoftwareRendererDeinit(struct GBVideoRenderer* renderer);
15static uint8_t GBVideoSoftwareRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value);
16static void GBVideoSoftwareRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data);
17static void GBVideoSoftwareRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value);
18static void GBVideoSoftwareRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address);
19static void GBVideoSoftwareRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam);
20static void GBVideoSoftwareRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax);
21static void GBVideoSoftwareRendererFinishScanline(struct GBVideoRenderer* renderer, int y);
22static void GBVideoSoftwareRendererFinishFrame(struct GBVideoRenderer* renderer);
23static void GBVideoSoftwareRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels);
24static void GBVideoSoftwareRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels);
25
26static void GBVideoSoftwareRendererDrawBackground(struct GBVideoSoftwareRenderer* renderer, uint8_t* maps, int startX, int endX, int sx, int sy);
27static void GBVideoSoftwareRendererDrawObj(struct GBVideoSoftwareRenderer* renderer, struct GBObj* obj, int startX, int endX, int y);
28
29static void _clearScreen(struct GBVideoSoftwareRenderer* renderer) {
30 size_t sgbOffset = 0;
31 if (renderer->model == GB_MODEL_SGB && renderer->sgbBorders) {
32 sgbOffset = renderer->outputBufferStride * 40 + 48;
33 }
34 int y;
35 for (y = 0; y < GB_VIDEO_VERTICAL_PIXELS; ++y) {
36 color_t* row = &renderer->outputBuffer[renderer->outputBufferStride * y + sgbOffset];
37 int x;
38 for (x = 0; x < GB_VIDEO_HORIZONTAL_PIXELS; x += 4) {
39 row[x + 0] = renderer->palette[0];
40 row[x + 1] = renderer->palette[0];
41 row[x + 2] = renderer->palette[0];
42 row[x + 3] = renderer->palette[0];
43 }
44 }
45}
46
47static void _regenerateSGBBorder(struct GBVideoSoftwareRenderer* renderer) {
48 int i;
49 for (i = 0; i < 0x40; ++i) {
50 uint16_t color;
51 LOAD_16LE(color, 0x800 + i * 2, renderer->d.sgbMapRam);
52 renderer->d.writePalette(&renderer->d, i + 0x40, color);
53 }
54 int x, y;
55 for (y = 0; y < 224; ++y) {
56 for (x = 0; x < 256; x += 8) {
57 if (x >= 48 && x < 208 && y >= 40 && y < 104) {
58 continue;
59 }
60 uint16_t mapData;
61 LOAD_16LE(mapData, (x >> 2) + (y & ~7) * 8, renderer->d.sgbMapRam);
62 if (UNLIKELY(SGBBgAttributesGetTile(mapData) >= 0x100)) {
63 continue;
64 }
65
66 int localY = y & 0x7;
67 if (SGBBgAttributesIsYFlip(mapData)) {
68 localY = 7 - localY;
69 }
70 uint8_t tileData[4];
71 tileData[0] = renderer->d.sgbCharRam[(SGBBgAttributesGetTile(mapData) * 16 + localY) * 2 + 0x00];
72 tileData[1] = renderer->d.sgbCharRam[(SGBBgAttributesGetTile(mapData) * 16 + localY) * 2 + 0x01];
73 tileData[2] = renderer->d.sgbCharRam[(SGBBgAttributesGetTile(mapData) * 16 + localY) * 2 + 0x10];
74 tileData[3] = renderer->d.sgbCharRam[(SGBBgAttributesGetTile(mapData) * 16 + localY) * 2 + 0x11];
75
76 size_t base = y * renderer->outputBufferStride + x;
77 int p = SGBBgAttributesGetPalette(mapData) * 0x10;
78 if (SGBBgAttributesIsXFlip(mapData)) {
79 renderer->outputBuffer[base + 0] = renderer->palette[p | ((tileData[0] >> 0) & 0x1) | ((tileData[1] << 1) & 0x2) | ((tileData[2] << 2) & 0x4) | ((tileData[3] << 3) & 0x8)];
80 renderer->outputBuffer[base + 1] = renderer->palette[p | ((tileData[0] >> 1) & 0x1) | ((tileData[1] >> 0) & 0x2) | ((tileData[2] << 1) & 0x4) | ((tileData[3] << 2) & 0x8)];
81 renderer->outputBuffer[base + 2] = renderer->palette[p | ((tileData[0] >> 2) & 0x1) | ((tileData[1] >> 1) & 0x2) | ((tileData[2] >> 0) & 0x4) | ((tileData[3] << 1) & 0x8)];
82 renderer->outputBuffer[base + 3] = renderer->palette[p | ((tileData[0] >> 3) & 0x1) | ((tileData[1] >> 2) & 0x2) | ((tileData[2] >> 1) & 0x4) | ((tileData[3] >> 0) & 0x8)];
83 renderer->outputBuffer[base + 4] = renderer->palette[p | ((tileData[0] >> 4) & 0x1) | ((tileData[1] >> 3) & 0x2) | ((tileData[2] >> 2) & 0x4) | ((tileData[3] >> 1) & 0x8)];
84 renderer->outputBuffer[base + 5] = renderer->palette[p | ((tileData[0] >> 5) & 0x1) | ((tileData[1] >> 4) & 0x2) | ((tileData[2] >> 3) & 0x4) | ((tileData[3] >> 2) & 0x8)];
85 renderer->outputBuffer[base + 6] = renderer->palette[p | ((tileData[0] >> 6) & 0x1) | ((tileData[1] >> 5) & 0x2) | ((tileData[2] >> 4) & 0x4) | ((tileData[3] >> 3) & 0x8)];
86 renderer->outputBuffer[base + 7] = renderer->palette[p | ((tileData[0] >> 7) & 0x1) | ((tileData[1] >> 6) & 0x2) | ((tileData[2] >> 5) & 0x4) | ((tileData[3] >> 4) & 0x8)];
87 } else {
88 renderer->outputBuffer[base + 0] = renderer->palette[p | ((tileData[0] >> 7) & 0x1) | ((tileData[1] >> 6) & 0x2) | ((tileData[2] >> 5) & 0x4) | ((tileData[3] >> 4) & 0x8)];
89 renderer->outputBuffer[base + 1] = renderer->palette[p | ((tileData[0] >> 6) & 0x1) | ((tileData[1] >> 5) & 0x2) | ((tileData[2] >> 4) & 0x4) | ((tileData[3] >> 3) & 0x8)];
90 renderer->outputBuffer[base + 2] = renderer->palette[p | ((tileData[0] >> 5) & 0x1) | ((tileData[1] >> 4) & 0x2) | ((tileData[2] >> 3) & 0x4) | ((tileData[3] >> 2) & 0x8)];
91 renderer->outputBuffer[base + 3] = renderer->palette[p | ((tileData[0] >> 4) & 0x1) | ((tileData[1] >> 3) & 0x2) | ((tileData[2] >> 2) & 0x4) | ((tileData[3] >> 1) & 0x8)];
92 renderer->outputBuffer[base + 4] = renderer->palette[p | ((tileData[0] >> 3) & 0x1) | ((tileData[1] >> 2) & 0x2) | ((tileData[2] >> 1) & 0x4) | ((tileData[3] >> 0) & 0x8)];
93 renderer->outputBuffer[base + 5] = renderer->palette[p | ((tileData[0] >> 2) & 0x1) | ((tileData[1] >> 1) & 0x2) | ((tileData[2] >> 0) & 0x4) | ((tileData[3] << 1) & 0x8)];
94 renderer->outputBuffer[base + 6] = renderer->palette[p | ((tileData[0] >> 1) & 0x1) | ((tileData[1] >> 0) & 0x2) | ((tileData[2] << 1) & 0x4) | ((tileData[3] << 2) & 0x8)];
95 renderer->outputBuffer[base + 7] = renderer->palette[p | ((tileData[0] >> 0) & 0x1) | ((tileData[1] << 1) & 0x2) | ((tileData[2] << 2) & 0x4) | ((tileData[3] << 3) & 0x8)];
96 }
97 }
98 }
99}
100
101static inline void _setAttribute(uint8_t* sgbAttributes, unsigned x, unsigned y, int palette) {
102 int p = sgbAttributes[(x >> 2) + 5 * y];
103 p &= ~(3 << (2 * (3 - (x & 3))));
104 p |= palette << (2 * (3 - (x & 3)));
105 sgbAttributes[(x >> 2) + 5 * y] = p;
106}
107
108static void _parseAttrBlock(struct GBVideoSoftwareRenderer* renderer, int start) {
109 uint8_t block[6];
110 if (start < 0) {
111 memcpy(block, renderer->sgbPartialDataSet, -start);
112 memcpy(&block[-start], renderer->sgbPacket, 6 + start);
113 } else {
114 memcpy(block, &renderer->sgbPacket[start], 6);
115 }
116 unsigned x0 = block[2];
117 unsigned x1 = block[4];
118 unsigned y0 = block[3];
119 unsigned y1 = block[5];
120 unsigned x, y;
121 int pIn = block[1] & 3;
122 int pPerim = (block[1] >> 2) & 3;
123 int pOut = (block[1] >> 4) & 3;
124
125 for (y = 0; y < GB_VIDEO_VERTICAL_PIXELS / 8; ++y) {
126 for (x = 0; x < GB_VIDEO_HORIZONTAL_PIXELS / 8; ++x) {
127 if (y > y0 && y < y1 && x > x0 && x < x1) {
128 if (block[0] & 1) {
129 _setAttribute(renderer->d.sgbAttributes, x, y, pIn);
130 }
131 } else if (y < y0 || y > y1 || x < x0 || x > x1) {
132 if (block[0] & 4) {
133 _setAttribute(renderer->d.sgbAttributes, x, y, pOut);
134 }
135 } else {
136 if (block[0] & 2) {
137 _setAttribute(renderer->d.sgbAttributes, x, y, pPerim);
138 } else if (block[0] & 1) {
139 _setAttribute(renderer->d.sgbAttributes, x, y, pIn);
140 } else if (block[0] & 4) {
141 _setAttribute(renderer->d.sgbAttributes, x, y, pOut);
142 }
143 }
144 }
145 }
146}
147
148void GBVideoSoftwareRendererCreate(struct GBVideoSoftwareRenderer* renderer) {
149 renderer->d.init = GBVideoSoftwareRendererInit;
150 renderer->d.deinit = GBVideoSoftwareRendererDeinit;
151 renderer->d.writeVideoRegister = GBVideoSoftwareRendererWriteVideoRegister;
152 renderer->d.writeSGBPacket = GBVideoSoftwareRendererWriteSGBPacket;
153 renderer->d.writePalette = GBVideoSoftwareRendererWritePalette;
154 renderer->d.writeVRAM = GBVideoSoftwareRendererWriteVRAM;
155 renderer->d.writeOAM = GBVideoSoftwareRendererWriteOAM;
156 renderer->d.drawRange = GBVideoSoftwareRendererDrawRange;
157 renderer->d.finishScanline = GBVideoSoftwareRendererFinishScanline;
158 renderer->d.finishFrame = GBVideoSoftwareRendererFinishFrame;
159 renderer->d.getPixels = GBVideoSoftwareRendererGetPixels;
160 renderer->d.putPixels = GBVideoSoftwareRendererPutPixels;
161
162 renderer->d.disableBG = false;
163 renderer->d.disableOBJ = false;
164 renderer->d.disableWIN = false;
165
166 renderer->temporaryBuffer = 0;
167}
168
169static void GBVideoSoftwareRendererInit(struct GBVideoRenderer* renderer, enum GBModel model, bool sgbBorders) {
170 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
171 softwareRenderer->lcdc = 0;
172 softwareRenderer->scy = 0;
173 softwareRenderer->scx = 0;
174 softwareRenderer->wy = 0;
175 softwareRenderer->currentWy = 0;
176 softwareRenderer->wx = 0;
177 softwareRenderer->model = model;
178 softwareRenderer->sgbTransfer = 0;
179 softwareRenderer->sgbCommandHeader = 0;
180 softwareRenderer->sgbBorders = sgbBorders;
181 int i;
182 for (i = 0; i < 64; ++i) {
183 softwareRenderer->lookup[i] = i;
184 softwareRenderer->lookup[i] = i;
185 softwareRenderer->lookup[i] = i;
186 softwareRenderer->lookup[i] = i;
187 }
188}
189
190static void GBVideoSoftwareRendererDeinit(struct GBVideoRenderer* renderer) {
191 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
192 UNUSED(softwareRenderer);
193}
194
195static uint8_t GBVideoSoftwareRendererWriteVideoRegister(struct GBVideoRenderer* renderer, uint16_t address, uint8_t value) {
196 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
197 switch (address) {
198 case REG_LCDC:
199 softwareRenderer->lcdc = value;
200 break;
201 case REG_SCY:
202 softwareRenderer->scy = value;
203 break;
204 case REG_SCX:
205 softwareRenderer->scx = value;
206 break;
207 case REG_WY:
208 softwareRenderer->wy = value;
209 break;
210 case REG_WX:
211 softwareRenderer->wx = value;
212 break;
213 case REG_BGP:
214 softwareRenderer->lookup[0] = value & 3;
215 softwareRenderer->lookup[1] = (value >> 2) & 3;
216 softwareRenderer->lookup[2] = (value >> 4) & 3;
217 softwareRenderer->lookup[3] = (value >> 6) & 3;
218 break;
219 case REG_OBP0:
220 softwareRenderer->lookup[0x20 + 0] = value & 3;
221 softwareRenderer->lookup[0x20 + 1] = (value >> 2) & 3;
222 softwareRenderer->lookup[0x20 + 2] = (value >> 4) & 3;
223 softwareRenderer->lookup[0x20 + 3] = (value >> 6) & 3;
224 break;
225 case REG_OBP1:
226 softwareRenderer->lookup[0x24 + 0] = value & 3;
227 softwareRenderer->lookup[0x24 + 1] = (value >> 2) & 3;
228 softwareRenderer->lookup[0x24 + 2] = (value >> 4) & 3;
229 softwareRenderer->lookup[0x24 + 3] = (value >> 6) & 3;
230 break;
231 }
232 return value;
233}
234
235static void GBVideoSoftwareRendererWriteSGBPacket(struct GBVideoRenderer* renderer, uint8_t* data) {
236 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
237 memcpy(softwareRenderer->sgbPacket, data, sizeof(softwareRenderer->sgbPacket));
238 int i;
239 if (!(softwareRenderer->sgbCommandHeader & 7)) {
240 softwareRenderer->sgbCommandHeader = data[0];
241 softwareRenderer->sgbPacketId = 0;
242 softwareRenderer->sgbTransfer = 0;
243 }
244 --softwareRenderer->sgbCommandHeader;
245 ++softwareRenderer->sgbPacketId;
246 int set;
247 switch (softwareRenderer->sgbCommandHeader >> 3) {
248 case SGB_PAL_SET:
249 softwareRenderer->sgbPacket[1] = data[9];
250 if (!(data[9] & 0x80)) {
251 break;
252 }
253 // Fall through
254 case SGB_ATTR_SET:
255 set = softwareRenderer->sgbPacket[1] & 0x3F;
256 if (set <= 0x2C) {
257 memcpy(renderer->sgbAttributes, &renderer->sgbAttributeFiles[set * 90], 90);
258 }
259 break;
260 case SGB_ATTR_BLK:
261 if (softwareRenderer->sgbPacketId == 1) {
262 softwareRenderer->sgbDataSets = softwareRenderer->sgbPacket[1];
263 i = 2;
264 } else {
265 i = (9 - softwareRenderer->sgbPacketId) % 3 * -2;
266 }
267 for (; i <= 10 && softwareRenderer->sgbDataSets; i += 6, --softwareRenderer->sgbDataSets) {
268 _parseAttrBlock(softwareRenderer, i);
269 }
270 if (i < 16 && softwareRenderer->sgbDataSets) {
271 memcpy(softwareRenderer->sgbPartialDataSet, &softwareRenderer->sgbPacket[i], 16 - i);
272 }
273 break;
274 case SGB_ATRC_EN:
275 if (softwareRenderer->sgbBorders) {
276 _regenerateSGBBorder(softwareRenderer);
277 }
278 break;
279 }
280}
281
282static void GBVideoSoftwareRendererWritePalette(struct GBVideoRenderer* renderer, int index, uint16_t value) {
283 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
284 color_t color = mColorFrom555(value);
285 softwareRenderer->palette[index] = color;
286 if (renderer->cache) {
287 mCacheSetWritePalette(renderer->cache, index, color);
288 }
289}
290
291static void GBVideoSoftwareRendererWriteVRAM(struct GBVideoRenderer* renderer, uint16_t address) {
292 if (renderer->cache) {
293 mCacheSetWriteVRAM(renderer->cache, address);
294 }
295}
296
297static void GBVideoSoftwareRendererWriteOAM(struct GBVideoRenderer* renderer, uint16_t oam) {
298 UNUSED(renderer);
299 UNUSED(oam);
300 // Nothing to do
301}
302
303static void GBVideoSoftwareRendererDrawRange(struct GBVideoRenderer* renderer, int startX, int endX, int y, struct GBObj* obj, size_t oamMax) {
304 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
305 uint8_t* maps = &softwareRenderer->d.vram[GB_BASE_MAP];
306 if (GBRegisterLCDCIsTileMap(softwareRenderer->lcdc)) {
307 maps += GB_SIZE_MAP;
308 }
309 if (softwareRenderer->d.disableBG) {
310 memset(&softwareRenderer->row[startX], 0, endX - startX);
311 }
312 if (GBRegisterLCDCIsBgEnable(softwareRenderer->lcdc) || softwareRenderer->model >= GB_MODEL_CGB) {
313 if (GBRegisterLCDCIsWindow(softwareRenderer->lcdc) && softwareRenderer->wy <= y && endX >= softwareRenderer->wx - 7) {
314 if (softwareRenderer->wx - 7 > 0 && !softwareRenderer->d.disableBG) {
315 GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, startX, softwareRenderer->wx - 7, softwareRenderer->scx, softwareRenderer->scy + y);
316 }
317
318 maps = &softwareRenderer->d.vram[GB_BASE_MAP];
319 if (GBRegisterLCDCIsWindowTileMap(softwareRenderer->lcdc)) {
320 maps += GB_SIZE_MAP;
321 }
322 if (!softwareRenderer->d.disableWIN) {
323 GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, softwareRenderer->wx - 7, endX, 7 - softwareRenderer->wx, softwareRenderer->currentWy);
324 }
325 } else if (!softwareRenderer->d.disableBG) {
326 GBVideoSoftwareRendererDrawBackground(softwareRenderer, maps, startX, endX, softwareRenderer->scx, softwareRenderer->scy + y);
327 }
328 } else if (!softwareRenderer->d.disableBG) {
329 memset(&softwareRenderer->row[startX], 0, endX - startX);
330 }
331
332 if (GBRegisterLCDCIsObjEnable(softwareRenderer->lcdc) && !softwareRenderer->d.disableOBJ) {
333 size_t i;
334 for (i = 0; i < oamMax; ++i) {
335 GBVideoSoftwareRendererDrawObj(softwareRenderer, &obj[i], startX, endX, y);
336 }
337 }
338
339 size_t sgbOffset = 0;
340 if (softwareRenderer->model == GB_MODEL_SGB && softwareRenderer->sgbBorders) {
341 sgbOffset = softwareRenderer->outputBufferStride * 40 + 48;
342 }
343 color_t* row = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * y + sgbOffset];
344 int x = startX;
345 int p = 0;
346 switch (softwareRenderer->d.sgbRenderMode) {
347 case 0:
348 if (softwareRenderer->model == GB_MODEL_SGB) {
349 p = softwareRenderer->d.sgbAttributes[(startX >> 5) + 5 * (y >> 3)];
350 p >>= 6 - ((x / 4) & 0x6);
351 p &= 3;
352 p <<= 2;
353 }
354 for (; x < ((startX + 7) & ~7) && x < endX; ++x) {
355 row[x] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x] & 0x7F]];
356 }
357 for (; x + 7 < (endX & ~7); x += 8) {
358 if (softwareRenderer->model == GB_MODEL_SGB) {
359 p = softwareRenderer->d.sgbAttributes[(x >> 5) + 5 * (y >> 3)];
360 p >>= 6 - ((x / 4) & 0x6);
361 p &= 3;
362 p <<= 2;
363 }
364 row[x + 0] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x] & 0x7F]];
365 row[x + 1] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 1] & 0x7F]];
366 row[x + 2] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 2] & 0x7F]];
367 row[x + 3] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 3] & 0x7F]];
368 row[x + 4] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 4] & 0x7F]];
369 row[x + 5] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 5] & 0x7F]];
370 row[x + 6] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 6] & 0x7F]];
371 row[x + 7] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x + 7] & 0x7F]];
372 }
373 if (softwareRenderer->model == GB_MODEL_SGB) {
374 p = softwareRenderer->d.sgbAttributes[(x >> 5) + 5 * (y >> 3)];
375 p >>= 6 - ((x / 4) & 0x6);
376 p &= 3;
377 p <<= 2;
378 }
379 for (; x < endX; ++x) {
380 row[x] = softwareRenderer->palette[p | softwareRenderer->lookup[softwareRenderer->row[x] & 0x7F]];
381 }
382 break;
383 case 1:
384 break;
385 case 2:
386 for (; x < ((startX + 7) & ~7) && x < endX; ++x) {
387 row[x] = 0;
388 }
389 for (; x + 7 < (endX & ~7); x += 8) {
390 row[x] = 0;
391 row[x + 1] = 0;
392 row[x + 2] = 0;
393 row[x + 3] = 0;
394 row[x + 4] = 0;
395 row[x + 5] = 0;
396 row[x + 6] = 0;
397 row[x + 7] = 0;
398 }
399 for (; x < endX; ++x) {
400 row[x] = 0;
401 }
402 break;
403 case 3:
404 for (; x < ((startX + 7) & ~7) && x < endX; ++x) {
405 row[x] = softwareRenderer->palette[0];
406 }
407 for (; x + 7 < (endX & ~7); x += 8) {
408 row[x] = softwareRenderer->palette[0];
409 row[x + 1] = softwareRenderer->palette[0];
410 row[x + 2] = softwareRenderer->palette[0];
411 row[x + 3] = softwareRenderer->palette[0];
412 row[x + 4] = softwareRenderer->palette[0];
413 row[x + 5] = softwareRenderer->palette[0];
414 row[x + 6] = softwareRenderer->palette[0];
415 row[x + 7] = softwareRenderer->palette[0];
416 }
417 for (; x < endX; ++x) {
418 row[x] = softwareRenderer->palette[0];
419 }
420 break;
421 }
422}
423
424static void GBVideoSoftwareRendererFinishScanline(struct GBVideoRenderer* renderer, int y) {
425 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
426
427 if (GBRegisterLCDCIsWindow(softwareRenderer->lcdc) && softwareRenderer->wy <= y && softwareRenderer->wx - 7 < GB_VIDEO_HORIZONTAL_PIXELS) {
428 ++softwareRenderer->currentWy;
429 }
430 if (softwareRenderer->sgbTransfer == 1) {
431 size_t offset = 2 * ((y & 7) + (y >> 3) * GB_VIDEO_HORIZONTAL_PIXELS);
432 if (offset >= 0x1000) {
433 return;
434 }
435 uint8_t* buffer = NULL;
436 switch (softwareRenderer->sgbCommandHeader >> 3) {
437 case SGB_PAL_TRN:
438 buffer = renderer->sgbPalRam;
439 break;
440 case SGB_CHR_TRN:
441 buffer = &renderer->sgbCharRam[SGB_SIZE_CHAR_RAM / 2 * (softwareRenderer->sgbPacket[1] & 1)];
442 break;
443 case SGB_PCT_TRN:
444 buffer = renderer->sgbMapRam;
445 break;
446 case SGB_ATTR_TRN:
447 buffer = renderer->sgbAttributeFiles;
448 break;
449 default:
450 break;
451 }
452 if (buffer) {
453 int i;
454 for (i = 0; i < GB_VIDEO_HORIZONTAL_PIXELS; i += 8) {
455 if (UNLIKELY(offset + (i << 1) + 1 >= 0x1000)) {
456 break;
457 }
458 uint8_t hi = 0;
459 uint8_t lo = 0;
460 hi |= (softwareRenderer->row[i + 0] & 0x2) << 6;
461 lo |= (softwareRenderer->row[i + 0] & 0x1) << 7;
462 hi |= (softwareRenderer->row[i + 1] & 0x2) << 5;
463 lo |= (softwareRenderer->row[i + 1] & 0x1) << 6;
464 hi |= (softwareRenderer->row[i + 2] & 0x2) << 4;
465 lo |= (softwareRenderer->row[i + 2] & 0x1) << 5;
466 hi |= (softwareRenderer->row[i + 3] & 0x2) << 3;
467 lo |= (softwareRenderer->row[i + 3] & 0x1) << 4;
468 hi |= (softwareRenderer->row[i + 4] & 0x2) << 2;
469 lo |= (softwareRenderer->row[i + 4] & 0x1) << 3;
470 hi |= (softwareRenderer->row[i + 5] & 0x2) << 1;
471 lo |= (softwareRenderer->row[i + 5] & 0x1) << 2;
472 hi |= (softwareRenderer->row[i + 6] & 0x2) << 0;
473 lo |= (softwareRenderer->row[i + 6] & 0x1) << 1;
474 hi |= (softwareRenderer->row[i + 7] & 0x2) >> 1;
475 lo |= (softwareRenderer->row[i + 7] & 0x1) >> 0;
476 buffer[offset + (i << 1) + 0] = lo;
477 buffer[offset + (i << 1) + 1] = hi;
478 }
479 }
480 }
481}
482
483static void GBVideoSoftwareRendererFinishFrame(struct GBVideoRenderer* renderer) {
484 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
485
486 if (softwareRenderer->temporaryBuffer) {
487 mappedMemoryFree(softwareRenderer->temporaryBuffer, GB_VIDEO_HORIZONTAL_PIXELS * GB_VIDEO_VERTICAL_PIXELS * 4);
488 softwareRenderer->temporaryBuffer = 0;
489 }
490 if (!GBRegisterLCDCIsEnable(softwareRenderer->lcdc)) {
491 _clearScreen(softwareRenderer);
492 }
493 if (softwareRenderer->model == GB_MODEL_SGB) {
494 switch (softwareRenderer->sgbCommandHeader >> 3) {
495 case SGB_PAL_SET:
496 case SGB_ATTR_SET:
497 if (softwareRenderer->sgbPacket[1] & 0x40) {
498 renderer->sgbRenderMode = 0;
499 }
500 break;
501 case SGB_PAL_TRN:
502 case SGB_CHR_TRN:
503 case SGB_PCT_TRN:
504 if (softwareRenderer->sgbTransfer > 0 && softwareRenderer->sgbBorders) {
505 // Make sure every buffer sees this if we're multibuffering
506 _regenerateSGBBorder(softwareRenderer);
507 }
508 // Fall through
509 case SGB_ATTR_TRN:
510 ++softwareRenderer->sgbTransfer;
511 if (softwareRenderer->sgbTransfer == 5) {
512 softwareRenderer->sgbCommandHeader = 0;
513 }
514 break;
515 default:
516 break;
517 }
518 }
519 softwareRenderer->currentWy = 0;
520}
521
522static void GBVideoSoftwareRendererDrawBackground(struct GBVideoSoftwareRenderer* renderer, uint8_t* maps, int startX, int endX, int sx, int sy) {
523 uint8_t* data = renderer->d.vram;
524 uint8_t* attr = &maps[GB_SIZE_VRAM_BANK0];
525 if (!GBRegisterLCDCIsTileData(renderer->lcdc)) {
526 data += 0x1000;
527 }
528 int topY = ((sy >> 3) & 0x1F) * 0x20;
529 int bottomY = sy & 7;
530 if (startX < 0) {
531 startX = 0;
532 }
533 int x;
534 if ((startX + sx) & 7) {
535 int startX2 = startX + 8 - ((startX + sx) & 7);
536 for (x = startX; x < startX2; ++x) {
537 uint8_t* localData = data;
538 int localY = bottomY;
539 int topX = ((x + sx) >> 3) & 0x1F;
540 int bottomX = 7 - ((x + sx) & 7);
541 int bgTile;
542 if (GBRegisterLCDCIsTileData(renderer->lcdc)) {
543 bgTile = maps[topX + topY];
544 } else {
545 bgTile = ((int8_t*) maps)[topX + topY];
546 }
547 int p = 0;
548 if (renderer->model >= GB_MODEL_CGB) {
549 GBObjAttributes attrs = attr[topX + topY];
550 p = GBObjAttributesGetCGBPalette(attrs) * 4;
551 if (GBObjAttributesIsPriority(attrs) && GBRegisterLCDCIsBgEnable(renderer->lcdc)) {
552 p |= 0x80;
553 }
554 if (GBObjAttributesIsBank(attrs)) {
555 localData += GB_SIZE_VRAM_BANK0;
556 }
557 if (GBObjAttributesIsYFlip(attrs)) {
558 localY = 7 - bottomY;
559 }
560 if (GBObjAttributesIsXFlip(attrs)) {
561 bottomX = 7 - bottomX;
562 }
563 }
564 uint8_t tileDataLower = localData[(bgTile * 8 + localY) * 2];
565 uint8_t tileDataUpper = localData[(bgTile * 8 + localY) * 2 + 1];
566 tileDataUpper >>= bottomX;
567 tileDataLower >>= bottomX;
568 renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
569 }
570 startX = startX2;
571 }
572 for (x = startX; x < endX; x += 8) {
573 uint8_t* localData = data;
574 int localY = bottomY;
575 int topX = ((x + sx) >> 3) & 0x1F;
576 int bgTile;
577 if (GBRegisterLCDCIsTileData(renderer->lcdc)) {
578 bgTile = maps[topX + topY];
579 } else {
580 bgTile = ((int8_t*) maps)[topX + topY];
581 }
582 int p = 0;
583 if (renderer->model >= GB_MODEL_CGB) {
584 GBObjAttributes attrs = attr[topX + topY];
585 p = GBObjAttributesGetCGBPalette(attrs) * 4;
586 if (GBObjAttributesIsPriority(attrs) && GBRegisterLCDCIsBgEnable(renderer->lcdc)) {
587 p |= 0x80;
588 }
589 if (GBObjAttributesIsBank(attrs)) {
590 localData += GB_SIZE_VRAM_BANK0;
591 }
592 if (GBObjAttributesIsYFlip(attrs)) {
593 localY = 7 - bottomY;
594 }
595 if (GBObjAttributesIsXFlip(attrs)) {
596 uint8_t tileDataLower = localData[(bgTile * 8 + localY) * 2];
597 uint8_t tileDataUpper = localData[(bgTile * 8 + localY) * 2 + 1];
598 renderer->row[x + 0] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
599 renderer->row[x + 1] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
600 renderer->row[x + 2] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
601 renderer->row[x + 3] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
602 renderer->row[x + 4] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
603 renderer->row[x + 5] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
604 renderer->row[x + 6] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
605 renderer->row[x + 7] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
606 continue;
607 }
608 }
609 uint8_t tileDataLower = localData[(bgTile * 8 + localY) * 2];
610 uint8_t tileDataUpper = localData[(bgTile * 8 + localY) * 2 + 1];
611 renderer->row[x + 7] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
612 renderer->row[x + 6] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
613 renderer->row[x + 5] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
614 renderer->row[x + 4] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
615 renderer->row[x + 3] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
616 renderer->row[x + 2] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
617 renderer->row[x + 1] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
618 renderer->row[x + 0] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
619 }
620}
621
622static void GBVideoSoftwareRendererDrawObj(struct GBVideoSoftwareRenderer* renderer, struct GBObj* obj, int startX, int endX, int y) {
623 int ix = obj->x - 8;
624 if (endX < ix || startX >= ix + 8) {
625 return;
626 }
627 if (obj->x < endX) {
628 endX = obj->x;
629 }
630 if (obj->x - 8 > startX) {
631 startX = obj->x - 8;
632 }
633 if (startX < 0) {
634 startX = 0;
635 }
636 uint8_t* data = renderer->d.vram;
637 int tileOffset = 0;
638 int bottomY;
639 if (GBObjAttributesIsYFlip(obj->attr)) {
640 bottomY = 7 - ((y - obj->y - 16) & 7);
641 if (GBRegisterLCDCIsObjSize(renderer->lcdc) && y - obj->y < -8) {
642 ++tileOffset;
643 }
644 } else {
645 bottomY = (y - obj->y - 16) & 7;
646 if (GBRegisterLCDCIsObjSize(renderer->lcdc) && y - obj->y >= -8) {
647 ++tileOffset;
648 }
649 }
650 if (GBRegisterLCDCIsObjSize(renderer->lcdc) && obj->tile & 1) {
651 --tileOffset;
652 }
653 uint8_t mask = GBObjAttributesIsPriority(obj->attr) ? 0x63 : 0x60;
654 uint8_t mask2 = GBObjAttributesIsPriority(obj->attr) ? 0 : 0x83;
655 int p;
656 if (renderer->model >= GB_MODEL_CGB) {
657 p = (GBObjAttributesGetCGBPalette(obj->attr) + 8) * 4;
658 if (GBObjAttributesIsBank(obj->attr)) {
659 data += GB_SIZE_VRAM_BANK0;
660 }
661 if (!GBRegisterLCDCIsBgEnable(renderer->lcdc)) {
662 mask = 0x60;
663 mask2 = 0x83;
664 }
665 } else {
666 p = (GBObjAttributesGetPalette(obj->attr) + 8) * 4;
667 }
668 int bottomX;
669 int x = startX;
670 if ((x - obj->x) & 7) {
671 for (; x < endX; ++x) {
672 if (GBObjAttributesIsXFlip(obj->attr)) {
673 bottomX = (x - obj->x) & 7;
674 } else {
675 bottomX = 7 - ((x - obj->x) & 7);
676 }
677 int objTile = obj->tile + tileOffset;
678 uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
679 uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
680 tileDataUpper >>= bottomX;
681 tileDataLower >>= bottomX;
682 color_t current = renderer->row[x];
683 if (((tileDataUpper | tileDataLower) & 1) && !(current & mask) && (current & mask2) <= 0x80) {
684 renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
685 }
686 }
687 } else if (GBObjAttributesIsXFlip(obj->attr)) {
688 int objTile = obj->tile + tileOffset;
689 uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
690 uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
691 color_t current;
692 current = renderer->row[x];
693 if (((tileDataUpper | tileDataLower) & 1) && !(current & mask) && (current & mask2) <= 0x80) {
694 renderer->row[x] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
695 }
696 current = renderer->row[x + 1];
697 if (((tileDataUpper | tileDataLower) & 2) && !(current & mask) && (current & mask2) <= 0x80) {
698 renderer->row[x + 1] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
699 }
700 current = renderer->row[x + 2];
701 if (((tileDataUpper | tileDataLower) & 4) && !(current & mask) && (current & mask2) <= 0x80) {
702 renderer->row[x + 2] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
703 }
704 current = renderer->row[x + 3];
705 if (((tileDataUpper | tileDataLower) & 8) && !(current & mask) && (current & mask2) <= 0x80) {
706 renderer->row[x + 3] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
707 }
708 current = renderer->row[x + 4];
709 if (((tileDataUpper | tileDataLower) & 16) && !(current & mask) && (current & mask2) <= 0x80) {
710 renderer->row[x + 4] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
711 }
712 current = renderer->row[x + 5];
713 if (((tileDataUpper | tileDataLower) & 32) && !(current & mask) && (current & mask2) <= 0x80) {
714 renderer->row[x + 5] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
715 }
716 current = renderer->row[x + 6];
717 if (((tileDataUpper | tileDataLower) & 64) && !(current & mask) && (current & mask2) <= 0x80) {
718 renderer->row[x + 6] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
719 }
720 current = renderer->row[x + 7];
721 if (((tileDataUpper | tileDataLower) & 128) && !(current & mask) && (current & mask2) <= 0x80) {
722 renderer->row[x + 7] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
723 }
724 } else {
725 int objTile = obj->tile + tileOffset;
726 uint8_t tileDataLower = data[(objTile * 8 + bottomY) * 2];
727 uint8_t tileDataUpper = data[(objTile * 8 + bottomY) * 2 + 1];
728 color_t current;
729 current = renderer->row[x + 7];
730 if (((tileDataUpper | tileDataLower) & 1) && !(current & mask) && (current & mask2) <= 0x80) {
731 renderer->row[x + 7] = p | ((tileDataUpper & 1) << 1) | (tileDataLower & 1);
732 }
733 current = renderer->row[x + 6];
734 if (((tileDataUpper | tileDataLower) & 2) && !(current & mask) && (current & mask2) <= 0x80) {
735 renderer->row[x + 6] = p | (tileDataUpper & 2) | ((tileDataLower & 2) >> 1);
736 }
737 current = renderer->row[x + 5];
738 if (((tileDataUpper | tileDataLower) & 4) && !(current & mask) && (current & mask2) <= 0x80) {
739 renderer->row[x + 5] = p | ((tileDataUpper & 4) >> 1) | ((tileDataLower & 4) >> 2);
740 }
741 current = renderer->row[x + 4];
742 if (((tileDataUpper | tileDataLower) & 8) && !(current & mask) && (current & mask2) <= 0x80) {
743 renderer->row[x + 4] = p | ((tileDataUpper & 8) >> 2) | ((tileDataLower & 8) >> 3);
744 }
745 current = renderer->row[x + 3];
746 if (((tileDataUpper | tileDataLower) & 16) && !(current & mask) && (current & mask2) <= 0x80) {
747 renderer->row[x + 3] = p | ((tileDataUpper & 16) >> 3) | ((tileDataLower & 16) >> 4);
748 }
749 current = renderer->row[x + 2];
750 if (((tileDataUpper | tileDataLower) & 32) && !(current & mask) && (current & mask2) <= 0x80) {
751 renderer->row[x + 2] = p | ((tileDataUpper & 32) >> 4) | ((tileDataLower & 32) >> 5);
752 }
753 current = renderer->row[x + 1];
754 if (((tileDataUpper | tileDataLower) & 64) && !(current & mask) && (current & mask2) <= 0x80) {
755 renderer->row[x + 1] = p | ((tileDataUpper & 64) >> 5) | ((tileDataLower & 64) >> 6);
756 }
757 current = renderer->row[x];
758 if (((tileDataUpper | tileDataLower) & 128) && !(current & mask) && (current & mask2) <= 0x80) {
759 renderer->row[x] = p | ((tileDataUpper & 128) >> 6) | ((tileDataLower & 128) >> 7);
760 }
761 }
762}
763
764static void GBVideoSoftwareRendererGetPixels(struct GBVideoRenderer* renderer, size_t* stride, const void** pixels) {
765 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
766 *stride = softwareRenderer->outputBufferStride;
767 *pixels = softwareRenderer->outputBuffer;
768}
769
770static void GBVideoSoftwareRendererPutPixels(struct GBVideoRenderer* renderer, size_t stride, const void* pixels) {
771 struct GBVideoSoftwareRenderer* softwareRenderer = (struct GBVideoSoftwareRenderer*) renderer;
772 // TODO: Share with GBAVideoSoftwareRendererGetPixels
773
774 const color_t* colorPixels = pixels;
775 unsigned i;
776 for (i = 0; i < GB_VIDEO_VERTICAL_PIXELS; ++i) {
777 memmove(&softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * i], &colorPixels[stride * i], GB_VIDEO_HORIZONTAL_PIXELS * BYTES_PER_PIXEL);
778 }
779}