src/gba/renderers/software-obj.c (view raw)
1/* Copyright (c) 2013-2015 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 "gba/renderers/software-private.h"
7
8#define SPRITE_NORMAL_LOOP(DEPTH, TYPE) \
9 SPRITE_YBASE_ ## DEPTH(inY); \
10 unsigned tileData; \
11 for (; outX < condition; ++outX, inX += xOffset) { \
12 if (!(renderer->row[outX] & FLAG_UNWRITTEN)) { \
13 continue; \
14 } \
15 renderer->spriteCyclesRemaining -= 1; \
16 SPRITE_XBASE_ ## DEPTH(inX); \
17 SPRITE_DRAW_PIXEL_ ## DEPTH ## _ ## TYPE(inX); \
18 }
19
20#define SPRITE_MOSAIC_LOOP(DEPTH, TYPE) \
21 SPRITE_YBASE_ ## DEPTH(inY); \
22 unsigned tileData; \
23 if (outX % mosaicH) { \
24 if (!inX && xOffset > 0) { \
25 inX = mosaicH - (outX % mosaicH); \
26 outX += mosaicH - (outX % mosaicH); \
27 } else if (inX == width - xOffset) { \
28 inX = mosaicH + (outX % mosaicH); \
29 outX += mosaicH - (outX % mosaicH); \
30 } \
31 } \
32 for (; outX < condition; ++outX, inX += xOffset) { \
33 if (!(renderer->row[outX] & FLAG_UNWRITTEN)) { \
34 continue; \
35 } \
36 int localX = inX - xOffset * (outX % mosaicH); \
37 if (localX < 0 || localX > width - 1) { \
38 continue; \
39 } \
40 SPRITE_XBASE_ ## DEPTH(localX); \
41 SPRITE_DRAW_PIXEL_ ## DEPTH ## _ ## TYPE(localX); \
42 }
43
44#define SPRITE_TRANSFORMED_LOOP(DEPTH, TYPE) \
45 unsigned tileData; \
46 unsigned widthMask = ~(width - 1); \
47 unsigned heightMask = ~(height - 1); \
48 for (; outX < condition; ++outX, ++inX) { \
49 if (!(renderer->row[outX] & FLAG_UNWRITTEN)) { \
50 continue; \
51 } \
52 renderer->spriteCyclesRemaining -= 2; \
53 xAccum += mat.a; \
54 yAccum += mat.c; \
55 int localX = xAccum >> 8; \
56 int localY = yAccum >> 8; \
57 \
58 if (localX & widthMask || localY & heightMask) { \
59 break; \
60 } \
61 \
62 SPRITE_YBASE_ ## DEPTH(localY); \
63 SPRITE_XBASE_ ## DEPTH(localX); \
64 SPRITE_DRAW_PIXEL_ ## DEPTH ## _ ## TYPE(localX); \
65 }
66
67#define SPRITE_XBASE_16(localX) unsigned xBase = (localX & ~0x7) * 4 + ((localX >> 1) & 2);
68#define SPRITE_YBASE_16(localY) unsigned yBase = (localY & ~0x7) * stride + (localY & 0x7) * 4;
69
70#define SPRITE_DRAW_PIXEL_16_NORMAL(localX) \
71 LOAD_16(tileData, ((yBase + charBase + xBase) & 0x7FFE), vramBase); \
72 tileData = (tileData >> ((localX & 3) << 2)) & 0xF; \
73 current = renderer->spriteLayer[outX]; \
74 if ((current & FLAG_ORDER_MASK) > flags) { \
75 if (tileData) { \
76 renderer->spriteLayer[outX] = palette[tileData] | flags; \
77 } else if (current != FLAG_UNWRITTEN) { \
78 renderer->spriteLayer[outX] = (current & ~FLAG_ORDER_MASK) | GBAObjAttributesCGetPriority(sprite->c) << OFFSET_PRIORITY; \
79 } \
80 }
81
82#define SPRITE_DRAW_PIXEL_16_NORMAL_OBJWIN(localX) \
83 LOAD_16(tileData, ((yBase + charBase + xBase) & 0x7FFE), vramBase); \
84 tileData = (tileData >> ((localX & 3) << 2)) & 0xF; \
85 current = renderer->spriteLayer[outX]; \
86 if ((current & FLAG_ORDER_MASK) > flags) { \
87 if (tileData) { \
88 unsigned color = (renderer->row[outX] & FLAG_OBJWIN) ? objwinPalette[tileData] : palette[tileData]; \
89 renderer->spriteLayer[outX] = color | flags; \
90 } else if (current != FLAG_UNWRITTEN) { \
91 renderer->spriteLayer[outX] = (current & ~FLAG_ORDER_MASK) | GBAObjAttributesCGetPriority(sprite->c) << OFFSET_PRIORITY; \
92 } \
93 }
94
95#define SPRITE_DRAW_PIXEL_16_OBJWIN(localX) \
96 LOAD_16(tileData, ((yBase + charBase + xBase) & 0x7FFE), vramBase); \
97 tileData = (tileData >> ((localX & 3) << 2)) & 0xF; \
98 if (tileData) { \
99 renderer->row[outX] |= FLAG_OBJWIN; \
100 }
101
102#define SPRITE_XBASE_256(localX) unsigned xBase = (localX & ~0x7) * 8 + (localX & 6);
103#define SPRITE_YBASE_256(localY) unsigned yBase = (localY & ~0x7) * stride + (localY & 0x7) * 8;
104
105#define SPRITE_DRAW_PIXEL_256_NORMAL(localX) \
106 LOAD_16(tileData, ((yBase + charBase + xBase) & 0x7FFE), vramBase); \
107 tileData = (tileData >> ((localX & 1) << 3)) & 0xFF; \
108 current = renderer->spriteLayer[outX]; \
109 if ((current & FLAG_ORDER_MASK) > flags) { \
110 if (tileData) { \
111 renderer->spriteLayer[outX] = palette[tileData] | flags; \
112 } else if (current != FLAG_UNWRITTEN) { \
113 renderer->spriteLayer[outX] = (current & ~FLAG_ORDER_MASK) | GBAObjAttributesCGetPriority(sprite->c) << OFFSET_PRIORITY; \
114 } \
115 }
116
117#define SPRITE_DRAW_PIXEL_256_NORMAL_OBJWIN(localX) \
118 LOAD_16(tileData, ((yBase + charBase + xBase) & 0x7FFE), vramBase); \
119 tileData = (tileData >> ((localX & 1) << 3)) & 0xFF; \
120 current = renderer->spriteLayer[outX]; \
121 if ((current & FLAG_ORDER_MASK) > flags) { \
122 if (tileData) { \
123 unsigned color = (renderer->row[outX] & FLAG_OBJWIN) ? objwinPalette[tileData] : palette[tileData]; \
124 renderer->spriteLayer[outX] = color | flags; \
125 } else if (current != FLAG_UNWRITTEN) { \
126 renderer->spriteLayer[outX] = (current & ~FLAG_ORDER_MASK) | GBAObjAttributesCGetPriority(sprite->c) << OFFSET_PRIORITY; \
127 } \
128 }
129
130#define SPRITE_DRAW_PIXEL_256_OBJWIN(localX) \
131 LOAD_16(tileData, ((yBase + charBase + xBase) & 0x7FFE), vramBase); \
132 tileData = (tileData >> ((localX & 1) << 3)) & 0xFF; \
133 if (tileData) { \
134 renderer->row[outX] |= FLAG_OBJWIN; \
135 }
136
137int GBAVideoSoftwareRendererPreprocessSprite(struct GBAVideoSoftwareRenderer* renderer, struct GBAObj* sprite, int y) {
138 int width = GBAVideoObjSizes[GBAObjAttributesAGetShape(sprite->a) * 4 + GBAObjAttributesBGetSize(sprite->b)][0];
139 int height = GBAVideoObjSizes[GBAObjAttributesAGetShape(sprite->a) * 4 + GBAObjAttributesBGetSize(sprite->b)][1];
140 int start = renderer->start;
141 int end = renderer->end;
142 uint32_t flags = GBAObjAttributesCGetPriority(sprite->c) << OFFSET_PRIORITY;
143 flags |= FLAG_TARGET_1 * ((GBAWindowControlIsBlendEnable(renderer->currentWindow.packed) && renderer->target1Obj && renderer->blendEffect == BLEND_ALPHA) || GBAObjAttributesAGetMode(sprite->a) == OBJ_MODE_SEMITRANSPARENT);
144 flags |= FLAG_OBJWIN * (GBAObjAttributesAGetMode(sprite->a) == OBJ_MODE_OBJWIN);
145 if ((flags & FLAG_OBJWIN) && renderer->currentWindow.priority < renderer->objwin.priority) {
146 return 0;
147 }
148 int32_t x = (uint32_t) GBAObjAttributesBGetX(sprite->b) << 23;
149 x >>= 23;
150 uint16_t* vramBase = &renderer->d.vram[BASE_TILE >> 1];
151 unsigned charBase = (GBAObjAttributesCGetTile(sprite->c) & ~GBAObjAttributesAGet256Color(sprite->a)) * 0x20;
152 if (GBARegisterDISPCNTGetMode(renderer->dispcnt) >= 3 && GBAObjAttributesCGetTile(sprite->c) < 512) {
153 return 0;
154 }
155 if (renderer->spriteCyclesRemaining <= 0) {
156 return 0;
157 }
158
159 int objwinSlowPath = GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt) && GBAWindowControlGetBlendEnable(renderer->objwin.packed) != GBAWindowControlIsBlendEnable(renderer->currentWindow.packed);
160 int variant = renderer->target1Obj &&
161 GBAWindowControlIsBlendEnable(renderer->currentWindow.packed) &&
162 (renderer->blendEffect == BLEND_BRIGHTEN || renderer->blendEffect == BLEND_DARKEN);
163 if (GBAObjAttributesAGetMode(sprite->a) == OBJ_MODE_SEMITRANSPARENT || objwinSlowPath) {
164 int target2 = renderer->target2Bd;
165 target2 |= renderer->bg[0].target2;
166 target2 |= renderer->bg[1].target2;
167 target2 |= renderer->bg[2].target2;
168 target2 |= renderer->bg[3].target2;
169 if (target2) {
170 flags |= FLAG_REBLEND;
171 variant = 0;
172 } else {
173 flags &= ~FLAG_TARGET_1;
174 }
175 }
176
177 color_t* palette = &renderer->normalPalette[0x100];
178 color_t* objwinPalette = palette;
179
180 if (variant) {
181 palette = &renderer->variantPalette[0x100];
182 if (GBAWindowControlIsBlendEnable(renderer->objwin.packed)) {
183 objwinPalette = palette;
184 }
185 }
186
187 int inY = y - (int) GBAObjAttributesAGetY(sprite->a);
188 int stride = GBARegisterDISPCNTIsObjCharacterMapping(renderer->dispcnt) ? (width >> !GBAObjAttributesAIs256Color(sprite->a)) : 0x80;
189
190 uint32_t current;
191 if (GBAObjAttributesAIsTransformed(sprite->a)) {
192 int totalWidth = width << GBAObjAttributesAGetDoubleSize(sprite->a);
193 int totalHeight = height << GBAObjAttributesAGetDoubleSize(sprite->a);
194 renderer->spriteCyclesRemaining -= 10;
195 struct GBAOAMMatrix mat;
196 LOAD_16(mat.a, 0, &renderer->d.oam->mat[GBAObjAttributesBGetMatIndex(sprite->b)].a);
197 LOAD_16(mat.b, 0, &renderer->d.oam->mat[GBAObjAttributesBGetMatIndex(sprite->b)].b);
198 LOAD_16(mat.c, 0, &renderer->d.oam->mat[GBAObjAttributesBGetMatIndex(sprite->b)].c);
199 LOAD_16(mat.d, 0, &renderer->d.oam->mat[GBAObjAttributesBGetMatIndex(sprite->b)].d);
200
201 if (inY < 0) {
202 inY += 256;
203 }
204 int outX = x >= start ? x : start;
205 int condition = x + totalWidth;
206 int inX = outX - x;
207 if (end < condition) {
208 condition = end;
209 }
210
211 int xAccum = mat.a * (inX - 1 - (totalWidth >> 1)) + mat.b * (inY - (totalHeight >> 1)) + (width << 7);
212 int yAccum = mat.c * (inX - 1 - (totalWidth >> 1)) + mat.d * (inY - (totalHeight >> 1)) + (height << 7);
213
214 // Clip off early pixels
215 // TODO: Transform end coordinates too
216 if (mat.a) {
217 if ((xAccum >> 8) < 0) {
218 int32_t diffX = -xAccum - 1;
219 int32_t x = mat.a ? diffX / mat.a : 0;
220 xAccum += mat.a * x;
221 yAccum += mat.c * x;
222 outX += x;
223 inX += x;
224 } else if ((xAccum >> 8) >= width) {
225 int32_t diffX = (width << 8) - xAccum;
226 int32_t x = mat.a ? diffX / mat.a : 0;
227 xAccum += mat.a * x;
228 yAccum += mat.c * x;
229 outX += x;
230 inX += x;
231 }
232 }
233 if (mat.c) {
234 if ((yAccum >> 8) < 0) {
235 int32_t diffY = - yAccum - 1;
236 int32_t y = mat.c ? diffY / mat.c : 0;
237 xAccum += mat.a * y;
238 yAccum += mat.c * y;
239 outX += y;
240 inX += y;
241 } else if ((yAccum >> 8) >= height) {
242 int32_t diffY = (height << 8) - yAccum;
243 int32_t y = mat.c ? diffY / mat.c : 0;
244 xAccum += mat.a * y;
245 yAccum += mat.c * y;
246 outX += y;
247 inX += y;
248 }
249 }
250
251 if (outX < start || outX >= condition) {
252 return 0;
253 }
254
255 if (!GBAObjAttributesAIs256Color(sprite->a)) {
256 palette = &palette[GBAObjAttributesCGetPalette(sprite->c) << 4];
257 if (flags & FLAG_OBJWIN) {
258 SPRITE_TRANSFORMED_LOOP(16, OBJWIN);
259 } else if (objwinSlowPath) {
260 objwinPalette = &objwinPalette[GBAObjAttributesCGetPalette(sprite->c) << 4];
261 SPRITE_TRANSFORMED_LOOP(16, NORMAL_OBJWIN);
262 } else {
263 SPRITE_TRANSFORMED_LOOP(16, NORMAL);
264 }
265 } else {
266 if (flags & FLAG_OBJWIN) {
267 SPRITE_TRANSFORMED_LOOP(256, OBJWIN);
268 } else if (objwinSlowPath) {
269 SPRITE_TRANSFORMED_LOOP(256, NORMAL_OBJWIN);
270 } else {
271 SPRITE_TRANSFORMED_LOOP(256, NORMAL);
272 }
273 }
274 if (x + totalWidth > VIDEO_HORIZONTAL_PIXELS) {
275 renderer->spriteCyclesRemaining -= (x + totalWidth - VIDEO_HORIZONTAL_PIXELS) * 2;
276 }
277 } else {
278 int outX = x >= start ? x : start;
279 int condition = x + width;
280 int mosaicH = 1;
281 if (GBAObjAttributesAIsMosaic(sprite->a)) {
282 mosaicH = GBAMosaicControlGetObjH(renderer->mosaic) + 1;
283 if (condition % mosaicH) {
284 condition += mosaicH - (condition % mosaicH);
285 }
286 }
287 if ((int) GBAObjAttributesAGetY(sprite->a) + height - 256 >= 0) {
288 inY += 256;
289 }
290 if (GBAObjAttributesBIsVFlip(sprite->b)) {
291 inY = height - inY - 1;
292 }
293 if (end < condition) {
294 condition = end;
295 }
296 int inX = outX - x;
297 int xOffset = 1;
298 if (GBAObjAttributesBIsHFlip(sprite->b)) {
299 inX = width - inX - 1;
300 xOffset = -1;
301 }
302 if (!GBAObjAttributesAIs256Color(sprite->a)) {
303 palette = &palette[GBAObjAttributesCGetPalette(sprite->c) << 4];
304 if (flags & FLAG_OBJWIN) {
305 SPRITE_NORMAL_LOOP(16, OBJWIN);
306 } else if (mosaicH > 1) {
307 if (objwinSlowPath) {
308 objwinPalette = &objwinPalette[GBAObjAttributesCGetPalette(sprite->c) << 4];
309 SPRITE_MOSAIC_LOOP(16, NORMAL_OBJWIN);
310 } else {
311 SPRITE_MOSAIC_LOOP(16, NORMAL);
312 }
313 } else if (objwinSlowPath) {
314 objwinPalette = &objwinPalette[GBAObjAttributesCGetPalette(sprite->c) << 4];
315 SPRITE_NORMAL_LOOP(16, NORMAL_OBJWIN);
316 } else {
317 SPRITE_NORMAL_LOOP(16, NORMAL);
318 }
319 } else {
320 if (flags & FLAG_OBJWIN) {
321 SPRITE_NORMAL_LOOP(256, OBJWIN);
322 } else if (mosaicH > 1) {
323 if (objwinSlowPath) {
324 SPRITE_MOSAIC_LOOP(256, NORMAL_OBJWIN);
325 } else {
326 SPRITE_MOSAIC_LOOP(256, NORMAL);
327 }
328 } else if (objwinSlowPath) {
329 SPRITE_NORMAL_LOOP(256, NORMAL_OBJWIN);
330 } else {
331 SPRITE_NORMAL_LOOP(256, NORMAL);
332 }
333 }
334 if (x + width > VIDEO_HORIZONTAL_PIXELS) {
335 renderer->spriteCyclesRemaining -= x + width - VIDEO_HORIZONTAL_PIXELS;
336 }
337 }
338 return 1;
339}
340
341void GBAVideoSoftwareRendererPostprocessSprite(struct GBAVideoSoftwareRenderer* renderer, unsigned priority) {
342 int x;
343 uint32_t* pixel = &renderer->row[renderer->start];
344 uint32_t flags = FLAG_TARGET_2 * renderer->target2Obj;
345
346 int objwinSlowPath = GBARegisterDISPCNTIsObjwinEnable(renderer->dispcnt);
347 bool objwinDisable = false;
348 bool objwinOnly = false;
349 if (objwinSlowPath) {
350 objwinDisable = !GBAWindowControlIsObjEnable(renderer->objwin.packed);
351 objwinOnly = !objwinDisable && !GBAWindowControlIsObjEnable(renderer->currentWindow.packed);
352 if (objwinDisable && !GBAWindowControlIsObjEnable(renderer->currentWindow.packed)) {
353 return;
354 }
355
356 if (objwinDisable) {
357 for (x = renderer->start; x < renderer->end; ++x, ++pixel) {
358 uint32_t color = renderer->spriteLayer[x] & ~FLAG_OBJWIN;
359 uint32_t current = *pixel;
360 if ((color & FLAG_UNWRITTEN) != FLAG_UNWRITTEN && !(current & FLAG_OBJWIN) && (color & FLAG_PRIORITY) >> OFFSET_PRIORITY == priority) {
361 _compositeBlendObjwin(renderer, pixel, color | flags, current);
362 }
363 }
364 return;
365 } else if (objwinOnly) {
366 for (x = renderer->start; x < renderer->end; ++x, ++pixel) {
367 uint32_t color = renderer->spriteLayer[x] & ~FLAG_OBJWIN;
368 uint32_t current = *pixel;
369 if ((color & FLAG_UNWRITTEN) != FLAG_UNWRITTEN && (current & FLAG_OBJWIN) && (color & FLAG_PRIORITY) >> OFFSET_PRIORITY == priority) {
370 _compositeBlendObjwin(renderer, pixel, color | flags, current);
371 }
372 }
373 return;
374 } else {
375 for (x = renderer->start; x < renderer->end; ++x, ++pixel) {
376 uint32_t color = renderer->spriteLayer[x] & ~FLAG_OBJWIN;
377 uint32_t current = *pixel;
378 if ((color & FLAG_UNWRITTEN) != FLAG_UNWRITTEN && (color & FLAG_PRIORITY) >> OFFSET_PRIORITY == priority) {
379 _compositeBlendObjwin(renderer, pixel, color | flags, current);
380 }
381 }
382 return;
383 }
384 } else if (!GBAWindowControlIsObjEnable(renderer->currentWindow.packed)) {
385 return;
386 }
387 for (x = renderer->start; x < renderer->end; ++x, ++pixel) {
388 uint32_t color = renderer->spriteLayer[x] & ~FLAG_OBJWIN;
389 uint32_t current = *pixel;
390 if ((color & FLAG_UNWRITTEN) != FLAG_UNWRITTEN && (color & FLAG_PRIORITY) >> OFFSET_PRIORITY == priority) {
391 _compositeBlendNoObjwin(renderer, pixel, color | flags, current);
392 }
393 }
394}