Mercurial > vba-linux

     1 #include "../Port.h"

     2 

     3 extern u32 RGB_LOW_BITS_MASK;

     4 

     5 void Scanlines(u8 *srcPtr, u32 srcPitch, u8 *,

     6                u8 *dstPtr, u32 dstPitch, int width, int height)

     7 {

     8 	u8 *nextLine, *finish;

     9 

    10 	nextLine = dstPtr + dstPitch;

    11 

    12 	do

    13 	{

    14 		u32 *bP = (u32 *) srcPtr;

    15 		u32 *dP = (u32 *) dstPtr;

    16 		u32 *nL = (u32 *) nextLine;

    17 		u32	 currentPixel;

    18 		u32	 nextPixel;

    19 

    20 		finish	  = (u8 *) bP + ((width + 2) << 1);

    21 		nextPixel = *bP++;

    22 

    23 		do

    24 		{

    25 			currentPixel = nextPixel;

    26 			nextPixel	 = *bP++;

    27 			u32 colorA, colorB;

    28 

    29 #ifdef WORDS_BIGENDIAN

    30 			colorA = currentPixel >> 16;

    31 			colorB = currentPixel & 0xffff;

    32 #else

    33 			colorA = currentPixel & 0xffff;

    34 			colorB = currentPixel >> 16;

    35 #endif

    36 

    37 			*(dP) = colorA | colorA << 16;

    38 			*(nL) = 0;

    39 

    40 #ifdef WORDS_BIGENDIAN

    41 			colorA = nextPixel >> 16;

    42 #else

    43 			colorA = nextPixel & 0xffff;

    44 #endif

    45 

    46 			*(dP + 1) = colorB | (colorB << 16);

    47 			*(nL + 1) = 0;

    48 

    49 			dP += 2;

    50 			nL += 2;

    51 		}

    52 		while ((u8 *) bP < finish);

    53 

    54 		srcPtr	 += srcPitch;

    55 		dstPtr	 += dstPitch << 1;

    56 		nextLine += dstPitch << 1;

    57 	}

    58 	while (--height);

    59 }

    60 

    61 void Scanlines32(u8 *srcPtr, u32 srcPitch, u8 * /* deltaPtr */,

    62                  u8 *dstPtr, u32 dstPitch, int width, int height)

    63 {

    64 	u8 *nextLine, *finish;

    65 

    66 	nextLine = dstPtr + dstPitch;

    67 

    68 	do

    69 	{

    70 		u32 *bP = (u32 *) srcPtr;

    71 		u32 *dP = (u32 *) dstPtr;

    72 		u32 *nL = (u32 *) nextLine;

    73 		u32	 currentPixel;

    74 		u32	 nextPixel;

    75 

    76 		finish	  = (u8 *) bP + ((width + 1) << 2);

    77 		nextPixel = *bP++;

    78 

    79 		do

    80 		{

    81 			currentPixel = nextPixel;

    82 			nextPixel	 = *bP++;

    83 

    84 			u32 colorA, colorB;

    85 

    86 			colorA = currentPixel;

    87 			colorB = nextPixel;

    88 

    89 			*(dP)	  = colorA;

    90 			*(dP + 1) = colorA;

    91 			*(nL)	  = 0;

    92 			*(nL + 1) = 0;

    93 

    94 			*(dP + 2) = colorB;

    95 			*(dP + 3) = colorB;

    96 			*(nL + 2) = 0;

    97 			*(nL + 3) = 0;

    98 

    99 			nextPixel = *bP++;

   100 

   101 			dP += 4;

   102 			nL += 4;

   103 		}

   104 		while ((u8 *) bP < finish);

   105 

   106 		srcPtr	 += srcPitch;

   107 		dstPtr	 += dstPitch << 1;

   108 		nextLine += dstPitch << 1;

   109 	}

   110 	while (--height);

   111 }

   112 

   113 void ScanlinesTV(u8 *srcPtr, u32 srcPitch, u8 * /* deltaPtr */,

   114                  u8 *dstPtr, u32 dstPitch, int width, int height)

   115 {

   116 	u8 *nextLine, *finish;

   117 	u32 colorMask = ~(RGB_LOW_BITS_MASK | (RGB_LOW_BITS_MASK << 16));

   118 

   119 	nextLine = dstPtr + dstPitch;

   120 

   121 	do

   122 	{

   123 		u32 *bP = (u32 *) srcPtr;

   124 		u32 *dP = (u32 *) dstPtr;

   125 		u32 *nL = (u32 *) nextLine;

   126 		u32	 currentPixel;

   127 		u32	 nextPixel;

   128 

   129 		finish	  = (u8 *) bP + ((width + 2) << 1);

   130 		nextPixel = *bP++;

   131 

   132 		do

   133 		{

   134 			currentPixel = nextPixel;

   135 			nextPixel	 = *bP++;

   136 

   137 			u32 colorA, colorB;

   138 

   139 #ifdef WORDS_BIGENDIAN

   140 			colorA = currentPixel >> 16;

   141 			colorB = currentPixel & 0xFFFF;

   142 #else

   143 			colorA = currentPixel & 0xFFFF;

   144 			colorB = currentPixel >> 16;

   145 #endif

   146 

   147 			*(dP) = colorA = colorA | ((((colorA & colorMask) >> 1) +

   148 			                            ((colorB & colorMask) >> 1))) << 16;

   149 			colorA	= ((colorA & colorMask) >> 1);

   150 			colorA += ((colorA & colorMask) >> 1);

   151 			*(nL)	= colorA;

   152 

   153 			colorA = nextPixel & 0xFFFF;

   154 

   155 			*(dP + 1) = colorB = colorB | ((((colorA & colorMask) >> 1) +

   156 			                                ((colorB & colorMask) >> 1))) << 16;

   157 			colorB	= ((colorB & colorMask) >> 1);

   158 			colorB += ((colorB & colorMask) >> 1);

   159 

   160 			*(nL + 1) = colorB;

   161 

   162 			dP += 2;

   163 			nL += 2;

   164 		}

   165 		while ((u8 *) bP < finish);

   166 

   167 		srcPtr	 += srcPitch;

   168 		dstPtr	 += dstPitch << 1;

   169 		nextLine += dstPitch << 1;

   170 	}

   171 	while (--height);

   172 }

   173 

   174 void ScanlinesTV32(u8 *srcPtr, u32 srcPitch, u8 * /* deltaPtr */,

   175                    u8 *dstPtr, u32 dstPitch, int width, int height)

   176 {

   177 	u8 *nextLine, *finish;

   178 	u32 colorMask = ~RGB_LOW_BITS_MASK;

   179 

   180 	nextLine = dstPtr + dstPitch;

   181 

   182 	do

   183 	{

   184 		u32 *bP = (u32 *) srcPtr;

   185 		u32 *dP = (u32 *) dstPtr;

   186 		u32 *nL = (u32 *) nextLine;

   187 		u32	 currentPixel;

   188 		u32	 nextPixel;

   189 

   190 		finish	  = (u8 *) bP + ((width + 1) << 2);

   191 		nextPixel = *bP++;

   192 

   193 		do

   194 		{

   195 			currentPixel = nextPixel;

   196 			nextPixel	 = *bP++;

   197 

   198 			u32 colorA, colorB, temp;

   199 

   200 			colorA = currentPixel;

   201 			colorB = nextPixel;

   202 

   203 			*(dP)	  = colorA;

   204 			*(dP + 1) = temp = ((colorA & colorMask) >> 1) +

   205 			                   ((colorB & colorMask) >> 1);

   206 			temp	= ((temp & colorMask) >> 1);

   207 			temp   += ((temp & colorMask) >> 1);

   208 			colorA	= ((colorA & colorMask) >> 1);

   209 			colorA += ((colorA & colorMask) >> 1);

   210 

   211 			*(nL)	  = colorA;

   212 			*(nL + 1) = temp;

   213 

   214 			dP += 2;

   215 			nL += 2;

   216 		}

   217 		while ((u8 *) bP < finish);

   218 

   219 		srcPtr	 += srcPitch;

   220 		dstPtr	 += dstPitch << 1;

   221 		nextLine += dstPitch << 1;

   222 	}

   223 	while (--height);

   224 }

   225
author	Robert McIntyre <rlm@mit.edu>
date	Sat, 03 Mar 2012 10:31:27 -0600
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