Mercurial > vba-linux

     1 #include "GBAGfx.h"

     2 #include "GBAGlobals.h"

     3 

     4 void mode4RenderLine()

     5 {

     6 	u16 *palette = (u16 *)paletteRAM;

     7 

     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 	}

    17 

    18 	if (layerEnable & 0x400)

    19 	{

    20 		int changed = gfxBG2Changed;

    21 

    22 		if (gfxLastVCOUNT > VCOUNT)

    23 			changed = 3;

    24 

    25 		gfxDrawRotScreen256(BG2CNT, BG2X_L, BG2X_H, BG2Y_L, BG2Y_H,

    26 		                    BG2PA, BG2PB, BG2PC, BG2PD,

    27 		                    gfxBG2X, gfxBG2Y, changed,

    28 		                    line2);

    29 	}

    30 

    31 	gfxDrawSprites(lineOBJ);

    32 

    33 	u32 backdrop = (READ16LE(&palette[0]) | 0x30000000);

    34 

    35 	for (int x = 0; x < 240; x++)

    36 	{

    37 		u32 color = backdrop;

    38 		u8  top   = 0x20;

    39 

    40 		if (line2[x] < color)

    41 		{

    42 			color = line2[x];

    43 			top   = 0x04;

    44 		}

    45 

    46 		if ((u8)(lineOBJ[x]>>24) < (u8)(color >> 24))

    47 		{

    48 			color = lineOBJ[x];

    49 			top   = 0x10;

    50 		}

    51 

    52 		if ((top & 0x10) && (color & 0x00010000))

    53 		{

    54 			// semi-transparent OBJ

    55 			u32 back = backdrop;

    56 			u8  top2 = 0x20;

    57 

    58 			if (line2[x] < back)

    59 			{

    60 				back = line2[x];

    61 				top2 = 0x04;

    62 			}

    63 

    64 			if (top2 & (BLDMOD>>8))

    65 				color = gfxAlphaBlend(color, back,

    66 				                      coeff[COLEV & 0x1F],

    67 				                      coeff[(COLEV >> 8) & 0x1F]);

    68 			else

    69 			{

    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 		}

    83 

    84 		lineMix[x] = color;

    85 	}

    86 	gfxBG2Changed = 0;

    87 	gfxLastVCOUNT = VCOUNT;

    88 }

    89 

    90 void mode4RenderLineNoWindow()

    91 {

    92 	u16 *palette = (u16 *)paletteRAM;

    93 

    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 	}

   103 

   104 	if (layerEnable & 0x400)

   105 	{

   106 		int changed = gfxBG2Changed;

   107 

   108 		if (gfxLastVCOUNT > VCOUNT)

   109 			changed = 3;

   110 

   111 		gfxDrawRotScreen256(BG2CNT, BG2X_L, BG2X_H, BG2Y_L, BG2Y_H,

   112 		                    BG2PA, BG2PB, BG2PC, BG2PD,

   113 		                    gfxBG2X, gfxBG2Y, changed,

   114 		                    line2);

   115 	}

   116 

   117 	gfxDrawSprites(lineOBJ);

   118 

   119 	u32 backdrop = (READ16LE(&palette[0]) | 0x30000000);

   120 

   121 	for (int x = 0; x < 240; x++)

   122 	{

   123 		u32 color = backdrop;

   124 		u8  top   = 0x20;

   125 

   126 		if (line2[x] < color)

   127 		{

   128 			color = line2[x];

   129 			top   = 0x04;

   130 		}

   131 

   132 		if ((u8)(lineOBJ[x]>>24) < (u8)(color >> 24))

   133 		{

   134 			color = lineOBJ[x];

   135 			top   = 0x10;

   136 		}

   137 

   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;

   150 

   151 					if (line2[x] < back)

   152 					{

   153 						if (top != 0x04)

   154 						{

   155 							back = line2[x];

   156 							top2 = 0x04;

   157 						}

   158 					}

   159 

   160 					if ((u8)(lineOBJ[x]>>24) < (u8)(back >> 24))

   161 					{

   162 						if (top != 0x10)

   163 						{

   164 							back = lineOBJ[x];

   165 							top2 = 0x10;

   166 						}

   167 					}

   168 

   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 		else

   187 		{

   188 			// semi-transparent OBJ

   189 			u32 back = backdrop;

   190 			u8  top2 = 0x20;

   191 

   192 			if (line2[x] < back)

   193 			{

   194 				back = line2[x];

   195 				top2 = 0x04;

   196 			}

   197 

   198 			if (top2 & (BLDMOD>>8))

   199 				color = gfxAlphaBlend(color, back,

   200 				                      coeff[COLEV & 0x1F],

   201 				                      coeff[(COLEV >> 8) & 0x1F]);

   202 			else

   203 			{

   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 		}

   217 

   218 		lineMix[x] = color;

   219 	}

   220 	gfxBG2Changed = 0;

   221 	gfxLastVCOUNT = VCOUNT;

   222 }

   223 

   224 void mode4RenderLineAll()

   225 {

   226 	u16 *palette = (u16 *)paletteRAM;

   227 

   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 	}

   237 

   238 	bool inWindow0 = false;

   239 	bool inWindow1 = false;

   240 

   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 		else

   249 			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 		else

   259 			inWindow1 |= (VCOUNT >= v0 || VCOUNT < v1);

   260 	}

   261 

   262 	if (layerEnable & 0x400)

   263 	{

   264 		int changed = gfxBG2Changed;

   265 

   266 		if (gfxLastVCOUNT > VCOUNT)

   267 			changed = 3;

   268 

   269 		gfxDrawRotScreen256(BG2CNT, BG2X_L, BG2X_H, BG2Y_L, BG2Y_H,

   270 		                    BG2PA, BG2PB, BG2PC, BG2PD,

   271 		                    gfxBG2X, gfxBG2Y, changed,

   272 		                    line2);

   273 	}

   274 

   275 	gfxDrawSprites(lineOBJ);

   276 	gfxDrawOBJWin(lineOBJWin);

   277 

   278 	u32 backdrop = (READ16LE(&palette[0]) | 0x30000000);

   279 

   280 	u8 inWin0Mask = WININ & 0xFF;

   281 	u8 inWin1Mask = WININ >> 8;

   282 	u8 outMask    = WINOUT & 0xFF;

   283 

   284 	for (int x = 0; x < 240; x++)

   285 	{

   286 		u32 color = backdrop;

   287 		u8  top   = 0x20;

   288 		u8  mask  = outMask;

   289 

   290 		if (!(lineOBJWin[x] & 0x80000000))

   291 		{

   292 			mask = WINOUT >> 8;

   293 		}

   294 

   295 		if (inWindow1)

   296 		{

   297 			if (gfxInWin1[x])

   298 				mask = inWin1Mask;

   299 		}

   300 

   301 		if (inWindow0)

   302 		{

   303 			if (gfxInWin0[x])

   304 			{

   305 				mask = inWin0Mask;

   306 			}

   307 		}

   308 

   309 		if ((mask & 4) && (line2[x] < color))

   310 		{

   311 			color = line2[x];

   312 			top   = 0x04;

   313 		}

   314 

   315 		if ((mask & 16) && ((u8)(lineOBJ[x]>>24) < (u8)(color >>24)))

   316 		{

   317 			color = lineOBJ[x];

   318 			top   = 0x10;

   319 		}

   320 

   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;

   335 

   336 						if ((mask & 4) && line2[x] < back)

   337 						{

   338 							if (top != 0x04)

   339 							{

   340 								back = line2[x];

   341 								top2 = 0x04;

   342 							}

   343 						}

   344 

   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 						}

   353 

   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 			else

   372 			{

   373 				// semi-transparent OBJ

   374 				u32 back = backdrop;

   375 				u8  top2 = 0x20;

   376 

   377 				if ((mask & 4) && line2[x] < back)

   378 				{

   379 					back = line2[x];

   380 					top2 = 0x04;

   381 				}

   382 

   383 				if (top2 & (BLDMOD>>8))

   384 					color = gfxAlphaBlend(color, back,

   385 					                      coeff[COLEV & 0x1F],

   386 					                      coeff[(COLEV >> 8) & 0x1F]);

   387 				else

   388 				{

   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 OBJ

   406 			u32 back = backdrop;

   407 			u8  top2 = 0x20;

   408 

   409 			if ((mask & 4) && line2[x] < back)

   410 			{

   411 				back = line2[x];

   412 				top2 = 0x04;

   413 			}

   414 

   415 			if (top2 & (BLDMOD>>8))

   416 				color = gfxAlphaBlend(color, back,

   417 				                      coeff[COLEV & 0x1F],

   418 				                      coeff[(COLEV >> 8) & 0x1F]);

   419 			else

   420 			{

   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 		}

   434 

   435 		lineMix[x] = color;

   436 	}

   437 	gfxBG2Changed = 0;

   438 	gfxLastVCOUNT = VCOUNT;

   439 }

   440
author	Robert McIntyre <rlm@mit.edu>
date	Sun, 04 Mar 2012 20:32:31 -0600
parents	f9f4f1b99eed
children