Mercurial > vba-clojure
view src/gba/Mode4.cpp @ 8:08a8e09ca414
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author | Robert McIntyre <rlm@mit.edu> |
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date | Sat, 03 Mar 2012 10:54:39 -0600 |
parents | f9f4f1b99eed |
children |
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1 #include "GBAGfx.h"2 #include "GBAGlobals.h"4 void mode4RenderLine()5 {6 u16 *palette = (u16 *)paletteRAM;8 if (DISPCNT & 0x0080)9 {10 for (int x = 0; x < 240; x++)11 {12 lineMix[x] = 0x7fff;13 }14 gfxLastVCOUNT = VCOUNT;15 return;16 }18 if (layerEnable & 0x400)19 {20 int changed = gfxBG2Changed;22 if (gfxLastVCOUNT > VCOUNT)23 changed = 3;25 gfxDrawRotScreen256(BG2CNT, BG2X_L, BG2X_H, BG2Y_L, BG2Y_H,26 BG2PA, BG2PB, BG2PC, BG2PD,27 gfxBG2X, gfxBG2Y, changed,28 line2);29 }31 gfxDrawSprites(lineOBJ);33 u32 backdrop = (READ16LE(&palette[0]) | 0x30000000);35 for (int x = 0; x < 240; x++)36 {37 u32 color = backdrop;38 u8 top = 0x20;40 if (line2[x] < color)41 {42 color = line2[x];43 top = 0x04;44 }46 if ((u8)(lineOBJ[x]>>24) < (u8)(color >> 24))47 {48 color = lineOBJ[x];49 top = 0x10;50 }52 if ((top & 0x10) && (color & 0x00010000))53 {54 // semi-transparent OBJ55 u32 back = backdrop;56 u8 top2 = 0x20;58 if (line2[x] < back)59 {60 back = line2[x];61 top2 = 0x04;62 }64 if (top2 & (BLDMOD>>8))65 color = gfxAlphaBlend(color, back,66 coeff[COLEV & 0x1F],67 coeff[(COLEV >> 8) & 0x1F]);68 else69 {70 switch ((BLDMOD >> 6) & 3)71 {72 case 2:73 if (BLDMOD & top)74 color = gfxIncreaseBrightness(color, coeff[COLY & 0x1F]);75 break;76 case 3:77 if (BLDMOD & top)78 color = gfxDecreaseBrightness(color, coeff[COLY & 0x1F]);79 break;80 }81 }82 }84 lineMix[x] = color;85 }86 gfxBG2Changed = 0;87 gfxLastVCOUNT = VCOUNT;88 }90 void mode4RenderLineNoWindow()91 {92 u16 *palette = (u16 *)paletteRAM;94 if (DISPCNT & 0x0080)95 {96 for (int x = 0; x < 240; x++)97 {98 lineMix[x] = 0x7fff;99 }100 gfxLastVCOUNT = VCOUNT;101 return;102 }104 if (layerEnable & 0x400)105 {106 int changed = gfxBG2Changed;108 if (gfxLastVCOUNT > VCOUNT)109 changed = 3;111 gfxDrawRotScreen256(BG2CNT, BG2X_L, BG2X_H, BG2Y_L, BG2Y_H,112 BG2PA, BG2PB, BG2PC, BG2PD,113 gfxBG2X, gfxBG2Y, changed,114 line2);115 }117 gfxDrawSprites(lineOBJ);119 u32 backdrop = (READ16LE(&palette[0]) | 0x30000000);121 for (int x = 0; x < 240; x++)122 {123 u32 color = backdrop;124 u8 top = 0x20;126 if (line2[x] < color)127 {128 color = line2[x];129 top = 0x04;130 }132 if ((u8)(lineOBJ[x]>>24) < (u8)(color >> 24))133 {134 color = lineOBJ[x];135 top = 0x10;136 }138 if (!(color & 0x00010000))139 {140 switch ((BLDMOD >> 6) & 3)141 {142 case 0:143 break;144 case 1:145 {146 if (top & BLDMOD)147 {148 u32 back = backdrop;149 u8 top2 = 0x20;151 if (line2[x] < back)152 {153 if (top != 0x04)154 {155 back = line2[x];156 top2 = 0x04;157 }158 }160 if ((u8)(lineOBJ[x]>>24) < (u8)(back >> 24))161 {162 if (top != 0x10)163 {164 back = lineOBJ[x];165 top2 = 0x10;166 }167 }169 if (top2 & (BLDMOD>>8))170 color = gfxAlphaBlend(color, back,171 coeff[COLEV & 0x1F],172 coeff[(COLEV >> 8) & 0x1F]);173 }174 break;175 }176 case 2:177 if (BLDMOD & top)178 color = gfxIncreaseBrightness(color, coeff[COLY & 0x1F]);179 break;180 case 3:181 if (BLDMOD & top)182 color = gfxDecreaseBrightness(color, coeff[COLY & 0x1F]);183 break;184 }185 }186 else187 {188 // semi-transparent OBJ189 u32 back = backdrop;190 u8 top2 = 0x20;192 if (line2[x] < back)193 {194 back = line2[x];195 top2 = 0x04;196 }198 if (top2 & (BLDMOD>>8))199 color = gfxAlphaBlend(color, back,200 coeff[COLEV & 0x1F],201 coeff[(COLEV >> 8) & 0x1F]);202 else203 {204 switch ((BLDMOD >> 6) & 3)205 {206 case 2:207 if (BLDMOD & top)208 color = gfxIncreaseBrightness(color, coeff[COLY & 0x1F]);209 break;210 case 3:211 if (BLDMOD & top)212 color = gfxDecreaseBrightness(color, coeff[COLY & 0x1F]);213 break;214 }215 }216 }218 lineMix[x] = color;219 }220 gfxBG2Changed = 0;221 gfxLastVCOUNT = VCOUNT;222 }224 void mode4RenderLineAll()225 {226 u16 *palette = (u16 *)paletteRAM;228 if (DISPCNT & 0x0080)229 {230 for (int x = 0; x < 240; x++)231 {232 lineMix[x] = 0x7fff;233 }234 gfxLastVCOUNT = VCOUNT;235 return;236 }238 bool inWindow0 = false;239 bool inWindow1 = false;241 if (layerEnable & 0x2000)242 {243 u8 v0 = WIN0V >> 8;244 u8 v1 = WIN0V & 255;245 inWindow0 = ((v0 == v1) && (v0 >= 0xe8));246 if (v1 >= v0)247 inWindow0 |= (VCOUNT >= v0 && VCOUNT < v1);248 else249 inWindow0 |= (VCOUNT >= v0 || VCOUNT < v1);250 }251 if (layerEnable & 0x4000)252 {253 u8 v0 = WIN1V >> 8;254 u8 v1 = WIN1V & 255;255 inWindow1 = ((v0 == v1) && (v0 >= 0xe8));256 if (v1 >= v0)257 inWindow1 |= (VCOUNT >= v0 && VCOUNT < v1);258 else259 inWindow1 |= (VCOUNT >= v0 || VCOUNT < v1);260 }262 if (layerEnable & 0x400)263 {264 int changed = gfxBG2Changed;266 if (gfxLastVCOUNT > VCOUNT)267 changed = 3;269 gfxDrawRotScreen256(BG2CNT, BG2X_L, BG2X_H, BG2Y_L, BG2Y_H,270 BG2PA, BG2PB, BG2PC, BG2PD,271 gfxBG2X, gfxBG2Y, changed,272 line2);273 }275 gfxDrawSprites(lineOBJ);276 gfxDrawOBJWin(lineOBJWin);278 u32 backdrop = (READ16LE(&palette[0]) | 0x30000000);280 u8 inWin0Mask = WININ & 0xFF;281 u8 inWin1Mask = WININ >> 8;282 u8 outMask = WINOUT & 0xFF;284 for (int x = 0; x < 240; x++)285 {286 u32 color = backdrop;287 u8 top = 0x20;288 u8 mask = outMask;290 if (!(lineOBJWin[x] & 0x80000000))291 {292 mask = WINOUT >> 8;293 }295 if (inWindow1)296 {297 if (gfxInWin1[x])298 mask = inWin1Mask;299 }301 if (inWindow0)302 {303 if (gfxInWin0[x])304 {305 mask = inWin0Mask;306 }307 }309 if ((mask & 4) && (line2[x] < color))310 {311 color = line2[x];312 top = 0x04;313 }315 if ((mask & 16) && ((u8)(lineOBJ[x]>>24) < (u8)(color >>24)))316 {317 color = lineOBJ[x];318 top = 0x10;319 }321 if (mask & 32)322 {323 if (!(color & 0x00010000))324 {325 switch ((BLDMOD >> 6) & 3)326 {327 case 0:328 break;329 case 1:330 {331 if (top & BLDMOD)332 {333 u32 back = backdrop;334 u8 top2 = 0x20;336 if ((mask & 4) && line2[x] < back)337 {338 if (top != 0x04)339 {340 back = line2[x];341 top2 = 0x04;342 }343 }345 if ((mask & 16) && (u8)(lineOBJ[x]>>24) < (u8)(back >> 24))346 {347 if (top != 0x10)348 {349 back = lineOBJ[x];350 top2 = 0x10;351 }352 }354 if (top2 & (BLDMOD>>8))355 color = gfxAlphaBlend(color, back,356 coeff[COLEV & 0x1F],357 coeff[(COLEV >> 8) & 0x1F]);358 }359 break;360 }361 case 2:362 if (BLDMOD & top)363 color = gfxIncreaseBrightness(color, coeff[COLY & 0x1F]);364 break;365 case 3:366 if (BLDMOD & top)367 color = gfxDecreaseBrightness(color, coeff[COLY & 0x1F]);368 break;369 }370 }371 else372 {373 // semi-transparent OBJ374 u32 back = backdrop;375 u8 top2 = 0x20;377 if ((mask & 4) && line2[x] < back)378 {379 back = line2[x];380 top2 = 0x04;381 }383 if (top2 & (BLDMOD>>8))384 color = gfxAlphaBlend(color, back,385 coeff[COLEV & 0x1F],386 coeff[(COLEV >> 8) & 0x1F]);387 else388 {389 switch ((BLDMOD >> 6) & 3)390 {391 case 2:392 if (BLDMOD & top)393 color = gfxIncreaseBrightness(color, coeff[COLY & 0x1F]);394 break;395 case 3:396 if (BLDMOD & top)397 color = gfxDecreaseBrightness(color, coeff[COLY & 0x1F]);398 break;399 }400 }401 }402 }403 else if (color & 0x00010000)404 {405 // semi-transparent OBJ406 u32 back = backdrop;407 u8 top2 = 0x20;409 if ((mask & 4) && line2[x] < back)410 {411 back = line2[x];412 top2 = 0x04;413 }415 if (top2 & (BLDMOD>>8))416 color = gfxAlphaBlend(color, back,417 coeff[COLEV & 0x1F],418 coeff[(COLEV >> 8) & 0x1F]);419 else420 {421 switch ((BLDMOD >> 6) & 3)422 {423 case 2:424 if (BLDMOD & top)425 color = gfxIncreaseBrightness(color, coeff[COLY & 0x1F]);426 break;427 case 3:428 if (BLDMOD & top)429 color = gfxDecreaseBrightness(color, coeff[COLY & 0x1F]);430 break;431 }432 }433 }435 lineMix[x] = color;436 }437 gfxBG2Changed = 0;438 gfxLastVCOUNT = VCOUNT;439 }