Mercurial > vba-linux

     1 #include <cstdlib>

     2 #include <cstring>

     3 #include "../Port.h"

     4 

     5 #ifdef MMX

     6 extern "C" bool cpu_mmx;

     7 #endif

     8 

     9 /*

    10  * Thanks to Kawaks' Mr. K for the code

    11 

    12    Incorporated into vba by Anthony Di Franco

    13  */

    14 

    15 static u8 *frm1 = NULL;

    16 static u8 *frm2 = NULL;

    17 static u8 *frm3 = NULL;

    18 

    19 extern u32 RGB_LOW_BITS_MASK;

    20 extern u32 qRGB_COLOR_MASK[2];

    21 

    22 static void Init()

    23 {

    24 	frm1 = (u8 *)calloc(322 * 242, 4);

    25 	// 1 frame ago

    26 	frm2 = (u8 *)calloc(322 * 242, 4);

    27 	// 2 frames ago

    28 	frm3 = (u8 *)calloc(322 * 242, 4);

    29 	// 3 frames ago

    30 }

    31 

    32 void InterframeCleanup()

    33 {

    34 	if (frm1)

    35 		free(frm1);

    36 	if (frm2)

    37 		free(frm2);

    38 	if (frm3)

    39 		free(frm3);

    40 	frm1 = frm2 = frm3 = NULL;

    41 }

    42 

    43 #ifdef MMX

    44 static void SmartIB_MMX(u8 *srcPtr, u32 srcPitch, int width, int height)

    45 {

    46 	u16 *src0 = (u16 *)srcPtr;

    47 	u16 *src1 = (u16 *)frm1;

    48 	u16 *src2 = (u16 *)frm2;

    49 	u16 *src3 = (u16 *)frm3;

    50 

    51 	int count = width >> 2;

    52 

    53 	for (int i = 0; i < height; i++)

    54 	{

    55 #ifdef __GNUC__

    56 		asm volatile (

    57 		    "push %4\n"

    58 		    "movq 0(%5), %%mm7\n"       // colorMask

    59 		    "0:\n"

    60 		    "movq 0(%0), %%mm0\n"       // src0

    61 		    "movq 0(%1), %%mm1\n"       // src1

    62 		    "movq 0(%2), %%mm2\n"       // src2

    63 		    "movq 0(%3), %%mm3\n"       // src3

    64 		    "movq %%mm0, 0(%3)\n"       // src3 = src0

    65 		    "movq %%mm0, %%mm4\n"

    66 		    "movq %%mm1, %%mm5\n"

    67 		    "pcmpeqw %%mm2, %%mm5\n"       // src1 == src2 (A)

    68 		    "pcmpeqw %%mm3, %%mm4\n"       // src3 == src0 (B)

    69 		    "por %%mm5, %%mm4\n"       // A | B

    70 		    "movq %%mm2, %%mm5\n"

    71 		    "pcmpeqw %%mm0, %%mm5\n"       // src0 == src2 (C)

    72 		    "pcmpeqw %%mm1, %%mm3\n"       // src1 == src3 (D)

    73 		    "por %%mm3, %%mm5\n"       // C|D

    74 		    "pandn %%mm5, %%mm4\n"       // (!(A|B))&(C|D)

    75 		    "movq %%mm0, %%mm2\n"

    76 		    "pand %%mm7, %%mm2\n"       // color & colorMask

    77 		    "pand %%mm7, %%mm1\n"       // src1 & colorMask

    78 		    "psrlw $1, %%mm2\n"       // (color & colorMask) >> 1 (E)

    79 		    "psrlw $1, %%mm1\n"       // (src & colorMask) >> 1 (F)

    80 		    "paddw %%mm2, %%mm1\n"       // E+F

    81 		    "pand %%mm4, %%mm1\n"       // (E+F) & res

    82 		    "pandn %%mm0, %%mm4\n"       // color& !res

    83 

    84 		    "por %%mm1, %%mm4\n"

    85 		    "movq %%mm4, 0(%0)\n"       // src0 = res

    86 

    87 		    "addl $8, %0\n"

    88 		    "addl $8, %1\n"

    89 		    "addl $8, %2\n"

    90 		    "addl $8, %3\n"

    91 

    92 		    "decl %4\n"

    93 		    "jnz 0b\n"

    94 		    "pop %4\n"

    95 		    "emms\n"

    96 			: "+r" (src0), "+r" (src1), "+r" (src2), "+r" (src3)

    97 			: "r" (count), "r" (qRGB_COLOR_MASK)

    98 		    );

    99 #else

   100 		__asm {

   101 			movq mm7, qword ptr [qRGB_COLOR_MASK];

   102 			mov	 eax, src0;

   103 			mov	 ebx, src1;

   104 			mov	 ecx, src2;

   105 			mov	 edx, src3;

   106 			mov	 edi, count;

   107 label0:

   108 			movq mm0, qword ptr [eax]; // src0

   109 			movq	   mm1, qword ptr [ebx]; // src1

   110 			movq	   mm2, qword ptr [ecx]; // src2

   111 			movq	   mm3, qword ptr [edx]; // src3

   112 			movq qword ptr [edx], mm0; // src3 = src0

   113 			movq	   mm4, mm0;

   114 			movq	   mm5, mm1;

   115 			pcmpeqw	   mm5, mm2; // src1 == src2 (A)

   116 			pcmpeqw	   mm4, mm3; // src3 == src0 (B)

   117 			por		   mm4, mm5; // A | B

   118 			movq	   mm5, mm2;

   119 			pcmpeqw	   mm5, mm0; // src0 == src2 (C)

   120 			pcmpeqw	   mm3, mm1; // src1 == src3 (D)

   121 			por		   mm5, mm3; // C|D

   122 			pandn	   mm4, mm5; // (!(A|B))&(C|D)

   123 			movq	   mm2, mm0;

   124 			pand	   mm2, mm7; // color & colorMask

   125 			pand	   mm1, mm7; // src1 & colorMask

   126 			psrlw	   mm2, 1; // (color & colorMask) >> 1 (E)

   127 			psrlw	   mm1, 1; // (src & colorMask) >> 1 (F)

   128 			paddw	   mm1, mm2; // E+F

   129 			pand	   mm1, mm4; // (E+F) & res

   130 			pandn	   mm4, mm0; // color & !res

   131 

   132 			por		   mm4, mm1;

   133 			movq qword ptr [eax], mm4; // src0 = res

   134 

   135 			add eax, 8;

   136 			add ebx, 8;

   137 			add ecx, 8;

   138 			add edx, 8;

   139 

   140 			dec edi;

   141 			jnz label0;

   142 			mov src0, eax;

   143 			mov src1, ebx;

   144 			mov src2, ecx;

   145 			mov src3, edx;

   146 			emms;

   147 		}

   148 #endif

   149 		src0 += 2;

   150 		src1 += 2;

   151 		src2 += 2;

   152 		src3 += 2;

   153 	}

   154 

   155 	/* Swap buffers around */

   156 	u8 *temp = frm1;

   157 	frm1 = frm3;

   158 	frm3 = frm2;

   159 	frm2 = temp;

   160 }

   161 

   162 #endif

   163 

   164 void SmartIB(u8 *srcPtr, u32 srcPitch, int width, int height)

   165 {

   166 	if (frm1 == NULL)

   167 	{

   168 		Init();

   169 	}

   170 #ifdef MMX

   171 	if (cpu_mmx)

   172 	{

   173 		SmartIB_MMX(srcPtr, srcPitch, width, height);

   174 		return;

   175 	}

   176 #endif

   177 

   178 	u16 colorMask = ~RGB_LOW_BITS_MASK;

   179 

   180 	u16 *src0 = (u16 *)srcPtr;

   181 	u16 *src1 = (u16 *)frm1;

   182 	u16 *src2 = (u16 *)frm2;

   183 	u16 *src3 = (u16 *)frm3;

   184 

   185 	int sPitch = srcPitch >> 1;

   186 

   187 	int pos = 0;

   188 	for (int j = 0; j < height; j++)

   189 		for (int i = 0; i < sPitch; i++)

   190 		{

   191 			u16 color = src0[pos];

   192 			src0[pos] =

   193 			    (src1[pos] != src2[pos]) &&

   194 			    (src3[pos] != color) &&

   195 			    ((color == src2[pos]) || (src1[pos] == src3[pos]))

   196 			    ? (((color & colorMask) >> 1) + ((src1[pos] & colorMask) >> 1)) :

   197 			    color;

   198 			src3[pos] = color; /* oldest buffer now holds newest frame */

   199 			pos++;

   200 		}

   201 

   202 	/* Swap buffers around */

   203 	u8 *temp = frm1;

   204 	frm1 = frm3;

   205 	frm3 = frm2;

   206 	frm2 = temp;

   207 }

   208 

   209 #ifdef MMX

   210 static void SmartIB32_MMX(u8 *srcPtr, u32 srcPitch, int width, int height)

   211 {

   212 	u32 *src0 = (u32 *)srcPtr;

   213 	u32 *src1 = (u32 *)frm1;

   214 	u32 *src2 = (u32 *)frm2;

   215 	u32 *src3 = (u32 *)frm3;

   216 

   217 	int count = width >> 1;

   218 

   219 	for (int i = 0; i < height; i++)

   220 	{

   221 #ifdef __GNUC__

   222 		asm volatile (

   223 		    "push %4\n"

   224 		    "movq 0(%5), %%mm7\n"       // colorMask

   225 		    "0:\n"

   226 		    "movq 0(%0), %%mm0\n"       // src0

   227 		    "movq 0(%1), %%mm1\n"       // src1

   228 		    "movq 0(%2), %%mm2\n"       // src2

   229 		    "movq 0(%3), %%mm3\n"       // src3

   230 		    "movq %%mm0, 0(%3)\n"       // src3 = src0

   231 		    "movq %%mm0, %%mm4\n"

   232 		    "movq %%mm1, %%mm5\n"

   233 		    "pcmpeqd %%mm2, %%mm5\n"       // src1 == src2 (A)

   234 		    "pcmpeqd %%mm3, %%mm4\n"       // src3 == src0 (B)

   235 		    "por %%mm5, %%mm4\n"       // A | B

   236 		    "movq %%mm2, %%mm5\n"

   237 		    "pcmpeqd %%mm0, %%mm5\n"       // src0 == src2 (C)

   238 		    "pcmpeqd %%mm1, %%mm3\n"       // src1 == src3 (D)

   239 		    "por %%mm3, %%mm5\n"       // C|D

   240 		    "pandn %%mm5, %%mm4\n"       // (!(A|B))&(C|D)

   241 		    "movq %%mm0, %%mm2\n"

   242 		    "pand %%mm7, %%mm2\n"       // color & colorMask

   243 		    "pand %%mm7, %%mm1\n"       // src1 & colorMask

   244 		    "psrld $1, %%mm2\n"       // (color & colorMask) >> 1 (E)

   245 		    "psrld $1, %%mm1\n"       // (src & colorMask) >> 1 (F)

   246 		    "paddd %%mm2, %%mm1\n"       // E+F

   247 		    "pand %%mm4, %%mm1\n"       // (E+F) & res

   248 		    "pandn %%mm0, %%mm4\n"       // color& !res

   249 

   250 		    "por %%mm1, %%mm4\n"

   251 		    "movq %%mm4, 0(%0)\n"       // src0 = res

   252 

   253 		    "addl $8, %0\n"

   254 		    "addl $8, %1\n"

   255 		    "addl $8, %2\n"

   256 		    "addl $8, %3\n"

   257 

   258 		    "decl %4\n"

   259 		    "jnz 0b\n"

   260 		    "pop %4\n"

   261 		    "emms\n"

   262 			: "+r" (src0), "+r" (src1), "+r" (src2), "+r" (src3)

   263 			: "r" (count), "r" (qRGB_COLOR_MASK)

   264 		    );

   265 #else

   266 		__asm {

   267 			movq mm7, qword ptr [qRGB_COLOR_MASK];

   268 			mov	 eax, src0;

   269 			mov	 ebx, src1;

   270 			mov	 ecx, src2;

   271 			mov	 edx, src3;

   272 			mov	 edi, count;

   273 label0:

   274 			movq mm0, qword ptr [eax]; // src0

   275 			movq	   mm1, qword ptr [ebx]; // src1

   276 			movq	   mm2, qword ptr [ecx]; // src2

   277 			movq	   mm3, qword ptr [edx]; // src3

   278 			movq qword ptr [edx], mm0; // src3 = src0

   279 			movq	   mm4, mm0;

   280 			movq	   mm5, mm1;

   281 			pcmpeqd	   mm5, mm2; // src1 == src2 (A)

   282 			pcmpeqd	   mm4, mm3; // src3 == src0 (B)

   283 			por		   mm4, mm5; // A | B

   284 			movq	   mm5, mm2;

   285 			pcmpeqd	   mm5, mm0; // src0 == src2 (C)

   286 			pcmpeqd	   mm3, mm1; // src1 == src3 (D)

   287 			por		   mm5, mm3; // C|D

   288 			pandn	   mm4, mm5; // (!(A|B))&(C|D)

   289 			movq	   mm2, mm0;

   290 			pand	   mm2, mm7; // color & colorMask

   291 			pand	   mm1, mm7; // src1 & colorMask

   292 			psrld	   mm2, 1; // (color & colorMask) >> 1 (E)

   293 			psrld	   mm1, 1; // (src & colorMask) >> 1 (F)

   294 			paddd	   mm1, mm2; // E+F

   295 			pand	   mm1, mm4; // (E+F) & res

   296 			pandn	   mm4, mm0; // color & !res

   297 

   298 			por		   mm4, mm1;

   299 			movq qword ptr [eax], mm4; // src0 = res

   300 

   301 			add eax, 8;

   302 			add ebx, 8;

   303 			add ecx, 8;

   304 			add edx, 8;

   305 

   306 			dec edi;

   307 			jnz label0;

   308 			mov src0, eax;

   309 			mov src1, ebx;

   310 			mov src2, ecx;

   311 			mov src3, edx;

   312 			emms;

   313 		}

   314 #endif

   315 

   316 		src0++;

   317 		src1++;

   318 		src2++;

   319 		src3++;

   320 	}

   321 	/* Swap buffers around */

   322 	u8 *temp = frm1;

   323 	frm1 = frm3;

   324 	frm3 = frm2;

   325 	frm2 = temp;

   326 }

   327 

   328 #endif

   329 

   330 void SmartIB32(u8 *srcPtr, u32 srcPitch, int width, int height)

   331 {

   332 	if (frm1 == NULL)

   333 	{

   334 		Init();

   335 	}

   336 #ifdef MMX

   337 	if (cpu_mmx)

   338 	{

   339 		SmartIB32_MMX(srcPtr, srcPitch, width, height);

   340 		return;

   341 	}

   342 #endif

   343 

   344 	u32 *src0 = (u32 *)srcPtr;

   345 	u32 *src1 = (u32 *)frm1;

   346 	u32 *src2 = (u32 *)frm2;

   347 	u32 *src3 = (u32 *)frm3;

   348 

   349 	u32 colorMask = 0xfefefe;

   350 

   351 	int sPitch = srcPitch >> 2;

   352 	int pos	   = 0;

   353 

   354 	for (int j = 0; j < height; j++)

   355 		for (int i = 0; i < sPitch; i++)

   356 		{

   357 			u32 color = src0[pos];

   358 			src0[pos] =

   359 			    (src1[pos] != src2[pos]) &&

   360 			    (src3[pos] != color) &&

   361 			    ((color == src2[pos]) || (src1[pos] == src3[pos]))

   362 			    ? (((color & colorMask) >> 1) + ((src1[pos] & colorMask) >> 1)) :

   363 			    color;

   364 			src3[pos] = color; /* oldest buffer now holds newest frame */

   365 			pos++;

   366 		}

   367 

   368 	/* Swap buffers around */

   369 	u8 *temp = frm1;

   370 	frm1 = frm3;

   371 	frm3 = frm2;

   372 	frm2 = temp;

   373 }

   374 

   375 #ifdef MMX

   376 static void MotionBlurIB_MMX(u8 *srcPtr, u32 srcPitch, int width, int height)

   377 {

   378 	u16 *src0 = (u16 *)srcPtr;

   379 	u16 *src1 = (u16 *)frm1;

   380 

   381 	int count = width >> 2;

   382 

   383 	for (int i = 0; i < height; i++)

   384 	{

   385 #ifdef __GNUC__

   386 		asm volatile (

   387 		    "push %2\n"

   388 		    "movq 0(%3), %%mm7\n"       // colorMask

   389 		    "0:\n"

   390 		    "movq 0(%0), %%mm0\n"       // src0

   391 		    "movq 0(%1), %%mm1\n"       // src1

   392 		    "movq %%mm0, 0(%1)\n"       // src1 = src0

   393 		    "pand %%mm7, %%mm0\n"       // color & colorMask

   394 		    "pand %%mm7, %%mm1\n"       // src1 & colorMask

   395 		    "psrlw $1, %%mm0\n"       // (color & colorMask) >> 1 (E)

   396 		    "psrlw $1, %%mm1\n"       // (src & colorMask) >> 1 (F)

   397 		    "paddw %%mm1, %%mm0\n"       // E+F

   398 

   399 		    "movq %%mm0, 0(%0)\n"       // src0 = res

   400 

   401 		    "addl $8, %0\n"

   402 		    "addl $8, %1\n"

   403 

   404 		    "decl %2\n"

   405 		    "jnz 0b\n"

   406 		    "pop %2\n"

   407 		    "emms\n"

   408 			: "+r" (src0), "+r" (src1)

   409 			: "r" (count), "r" (qRGB_COLOR_MASK)

   410 		    );

   411 #else

   412 		__asm {

   413 			movq mm7, qword ptr [qRGB_COLOR_MASK];

   414 			mov	 eax, src0;

   415 			mov	 ebx, src1;

   416 			mov	 edi, count;

   417 label0:

   418 			movq mm0, qword ptr [eax]; // src0

   419 			movq	   mm1, qword ptr [ebx]; // src1

   420 			movq qword ptr [ebx], mm0; // src1 = src0

   421 			pand	   mm0, mm7; // color & colorMask

   422 			pand	   mm1, mm7; // src1 & colorMask

   423 			psrlw	   mm0, 1; // (color & colorMask) >> 1 (E)

   424 			psrlw	   mm1, 1; // (src & colorMask) >> 1 (F)

   425 			paddw	   mm0, mm1; // E+F

   426 

   427 			movq qword ptr [eax], mm0; // src0 = res

   428 

   429 			add eax, 8;

   430 			add ebx, 8;

   431 

   432 			dec edi;

   433 			jnz label0;

   434 			mov src0, eax;

   435 			mov src1, ebx;

   436 			emms;

   437 		}

   438 #endif

   439 		src0 += 2;

   440 		src1 += 2;

   441 	}

   442 }

   443 

   444 #endif

   445 

   446 void MotionBlurIB(u8 *srcPtr, u32 srcPitch, int width, int height)

   447 {

   448 	if (frm1 == NULL)

   449 	{

   450 		Init();

   451 	}

   452 

   453 #ifdef MMX

   454 	if (cpu_mmx)

   455 	{

   456 		MotionBlurIB_MMX(srcPtr, srcPitch, width, height);

   457 		return;

   458 	}

   459 #endif

   460 

   461 	u16 colorMask = ~RGB_LOW_BITS_MASK;

   462 

   463 	u16 *src0 = (u16 *)srcPtr;

   464 	u16 *src1 = (u16 *)frm1;

   465 

   466 	int sPitch = srcPitch >> 1;

   467 

   468 	int pos = 0;

   469 	for (int j = 0; j < height; j++)

   470 		for (int i = 0; i < sPitch; i++)

   471 		{

   472 			u16 color = src0[pos];

   473 			src0[pos] =

   474 			    (((color & colorMask) >> 1) + ((src1[pos] & colorMask) >> 1));

   475 			src1[pos] = color;

   476 			pos++;

   477 		}

   478 }

   479 

   480 #ifdef MMX

   481 static void MotionBlurIB32_MMX(u8 *srcPtr, u32 srcPitch, int width, int height)

   482 {

   483 	u32 *src0 = (u32 *)srcPtr;

   484 	u32 *src1 = (u32 *)frm1;

   485 

   486 	int count = width >> 1;

   487 

   488 	for (int i = 0; i < height; i++)

   489 	{

   490 #ifdef __GNUC__

   491 		asm volatile (

   492 		    "push %2\n"

   493 		    "movq 0(%3), %%mm7\n"       // colorMask

   494 		    "0:\n"

   495 		    "movq 0(%0), %%mm0\n"       // src0

   496 		    "movq 0(%1), %%mm1\n"       // src1

   497 		    "movq %%mm0, 0(%1)\n"       // src1 = src0

   498 		    "pand %%mm7, %%mm0\n"       // color & colorMask

   499 		    "pand %%mm7, %%mm1\n"       // src1 & colorMask

   500 		    "psrld $1, %%mm0\n"       // (color & colorMask) >> 1 (E)

   501 		    "psrld $1, %%mm1\n"       // (src & colorMask) >> 1 (F)

   502 		    "paddd %%mm1, %%mm0\n"       // E+F

   503 

   504 		    "movq %%mm0, 0(%0)\n"       // src0 = res

   505 

   506 		    "addl $8, %0\n"

   507 		    "addl $8, %1\n"

   508 

   509 		    "decl %2\n"

   510 		    "jnz 0b\n"

   511 		    "pop %2\n"

   512 		    "emms\n"

   513 			: "+r" (src0), "+r" (src1)

   514 			: "r" (count), "r" (qRGB_COLOR_MASK)

   515 		    );

   516 #else

   517 		__asm {

   518 			movq mm7, qword ptr [qRGB_COLOR_MASK];

   519 			mov	 eax, src0;

   520 			mov	 ebx, src1;

   521 			mov	 edi, count;

   522 label0:

   523 			movq mm0, qword ptr [eax]; // src0

   524 			movq	   mm1, qword ptr [ebx]; // src1

   525 			movq qword ptr [ebx], mm0; // src1 = src0

   526 			pand	   mm0, mm7; // color & colorMask

   527 			pand	   mm1, mm7; // src1 & colorMask

   528 			psrld	   mm0, 1; // (color & colorMask) >> 1 (E)

   529 			psrld	   mm1, 1; // (src & colorMask) >> 1 (F)

   530 			paddd	   mm0, mm1; // E+F

   531 

   532 			movq qword ptr [eax], mm0; // src0 = res

   533 

   534 			add eax, 8;

   535 			add ebx, 8;

   536 

   537 			dec edi;

   538 			jnz label0;

   539 			mov src0, eax;

   540 			mov src1, ebx;

   541 			emms;

   542 		}

   543 #endif

   544 		src0++;

   545 		src1++;

   546 	}

   547 }

   548 

   549 #endif

   550 

   551 void MotionBlurIB32(u8 *srcPtr, u32 srcPitch, int width, int height)

   552 {

   553 	if (frm1 == NULL)

   554 	{

   555 		Init();

   556 	}

   557 

   558 #ifdef MMX

   559 	if (cpu_mmx)

   560 	{

   561 		MotionBlurIB32_MMX(srcPtr, srcPitch, width, height);

   562 		return;

   563 	}

   564 #endif

   565 

   566 	u32 *src0 = (u32 *)srcPtr;

   567 	u32 *src1 = (u32 *)frm1;

   568 

   569 	u32 colorMask = 0xfefefe;

   570 

   571 	int sPitch = srcPitch >> 2;

   572 	int pos	   = 0;

   573 

   574 	for (int j = 0; j < height; j++)

   575 		for (int i = 0; i < sPitch; i++)

   576 		{

   577 			u32 color = src0[pos];

   578 			src0[pos] = (((color & colorMask) >> 1) +

   579 			             ((src1[pos] & colorMask) >> 1));

   580 			src1[pos] = color;

   581 			pos++;

   582 		}

   583 }

   584 

   585 static int count = 0;

   586 

   587 void InterlaceIB(u8 *srcPtr, u32 srcPitch, int width, int height)

   588 {

   589 	if (frm1 == NULL)

   590 	{

   591 		Init();

   592 	}

   593 

   594 	u16 colorMask = ~RGB_LOW_BITS_MASK;

   595 

   596 	u16 *src0 = (u16 *)srcPtr;

   597 	u16 *src1 = (u16 *)frm1;

   598 

   599 	int sPitch = srcPitch >> 1;

   600 

   601 	int pos = 0;

   602 	for (int j = 0; j < height; j++)

   603 	{

   604 		bool render = count ? (j & 1) != 0 : (j & 1) == 0;

   605 		if (render)

   606 		{

   607 			for (int i = 0; i < sPitch; i++)

   608 			{

   609 				u16 color = src0[pos];

   610 				src0[pos] =

   611 				    (((color & colorMask) >> 1) + ((((src1[pos] & colorMask) >> 1) & colorMask) >> 1));

   612 				src1[pos] = color;

   613 				pos++;

   614 			}

   615 		}

   616 		else

   617 		{

   618 			for (int i = 0; i < sPitch; i++)

   619 			{

   620 				u16 color = src0[pos];

   621 				src0[pos] =

   622 				    (((((color & colorMask) >> 1) & colorMask) >> 1) + ((src1[pos] & colorMask) >> 1));

   623 				src1[pos] = color;

   624 				pos++;

   625 			}

   626 		}

   627 	}

   628 	count = count ^ 1;

   629 }

   630
author	Robert McIntyre <rlm@mit.edu>
date	Sat, 03 Mar 2012 10:31:27 -0600
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