diff src/filters/scanline.cpp @ 1:f9f4f1b99eed

importing src directory
author Robert McIntyre <rlm@mit.edu>
date Sat, 03 Mar 2012 10:31:27 -0600
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     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/filters/scanline.cpp	Sat Mar 03 10:31:27 2012 -0600
     1.3 @@ -0,0 +1,225 @@
     1.4 +#include "../Port.h"
     1.5 +
     1.6 +extern u32 RGB_LOW_BITS_MASK;
     1.7 +
     1.8 +void Scanlines(u8 *srcPtr, u32 srcPitch, u8 *,
     1.9 +               u8 *dstPtr, u32 dstPitch, int width, int height)
    1.10 +{
    1.11 +	u8 *nextLine, *finish;
    1.12 +
    1.13 +	nextLine = dstPtr + dstPitch;
    1.14 +
    1.15 +	do
    1.16 +	{
    1.17 +		u32 *bP = (u32 *) srcPtr;
    1.18 +		u32 *dP = (u32 *) dstPtr;
    1.19 +		u32 *nL = (u32 *) nextLine;
    1.20 +		u32	 currentPixel;
    1.21 +		u32	 nextPixel;
    1.22 +
    1.23 +		finish	  = (u8 *) bP + ((width + 2) << 1);
    1.24 +		nextPixel = *bP++;
    1.25 +
    1.26 +		do
    1.27 +		{
    1.28 +			currentPixel = nextPixel;
    1.29 +			nextPixel	 = *bP++;
    1.30 +			u32 colorA, colorB;
    1.31 +
    1.32 +#ifdef WORDS_BIGENDIAN
    1.33 +			colorA = currentPixel >> 16;
    1.34 +			colorB = currentPixel & 0xffff;
    1.35 +#else
    1.36 +			colorA = currentPixel & 0xffff;
    1.37 +			colorB = currentPixel >> 16;
    1.38 +#endif
    1.39 +
    1.40 +			*(dP) = colorA | colorA << 16;
    1.41 +			*(nL) = 0;
    1.42 +
    1.43 +#ifdef WORDS_BIGENDIAN
    1.44 +			colorA = nextPixel >> 16;
    1.45 +#else
    1.46 +			colorA = nextPixel & 0xffff;
    1.47 +#endif
    1.48 +
    1.49 +			*(dP + 1) = colorB | (colorB << 16);
    1.50 +			*(nL + 1) = 0;
    1.51 +
    1.52 +			dP += 2;
    1.53 +			nL += 2;
    1.54 +		}
    1.55 +		while ((u8 *) bP < finish);
    1.56 +
    1.57 +		srcPtr	 += srcPitch;
    1.58 +		dstPtr	 += dstPitch << 1;
    1.59 +		nextLine += dstPitch << 1;
    1.60 +	}
    1.61 +	while (--height);
    1.62 +}
    1.63 +
    1.64 +void Scanlines32(u8 *srcPtr, u32 srcPitch, u8 * /* deltaPtr */,
    1.65 +                 u8 *dstPtr, u32 dstPitch, int width, int height)
    1.66 +{
    1.67 +	u8 *nextLine, *finish;
    1.68 +
    1.69 +	nextLine = dstPtr + dstPitch;
    1.70 +
    1.71 +	do
    1.72 +	{
    1.73 +		u32 *bP = (u32 *) srcPtr;
    1.74 +		u32 *dP = (u32 *) dstPtr;
    1.75 +		u32 *nL = (u32 *) nextLine;
    1.76 +		u32	 currentPixel;
    1.77 +		u32	 nextPixel;
    1.78 +
    1.79 +		finish	  = (u8 *) bP + ((width + 1) << 2);
    1.80 +		nextPixel = *bP++;
    1.81 +
    1.82 +		do
    1.83 +		{
    1.84 +			currentPixel = nextPixel;
    1.85 +			nextPixel	 = *bP++;
    1.86 +
    1.87 +			u32 colorA, colorB;
    1.88 +
    1.89 +			colorA = currentPixel;
    1.90 +			colorB = nextPixel;
    1.91 +
    1.92 +			*(dP)	  = colorA;
    1.93 +			*(dP + 1) = colorA;
    1.94 +			*(nL)	  = 0;
    1.95 +			*(nL + 1) = 0;
    1.96 +
    1.97 +			*(dP + 2) = colorB;
    1.98 +			*(dP + 3) = colorB;
    1.99 +			*(nL + 2) = 0;
   1.100 +			*(nL + 3) = 0;
   1.101 +
   1.102 +			nextPixel = *bP++;
   1.103 +
   1.104 +			dP += 4;
   1.105 +			nL += 4;
   1.106 +		}
   1.107 +		while ((u8 *) bP < finish);
   1.108 +
   1.109 +		srcPtr	 += srcPitch;
   1.110 +		dstPtr	 += dstPitch << 1;
   1.111 +		nextLine += dstPitch << 1;
   1.112 +	}
   1.113 +	while (--height);
   1.114 +}
   1.115 +
   1.116 +void ScanlinesTV(u8 *srcPtr, u32 srcPitch, u8 * /* deltaPtr */,
   1.117 +                 u8 *dstPtr, u32 dstPitch, int width, int height)
   1.118 +{
   1.119 +	u8 *nextLine, *finish;
   1.120 +	u32 colorMask = ~(RGB_LOW_BITS_MASK | (RGB_LOW_BITS_MASK << 16));
   1.121 +
   1.122 +	nextLine = dstPtr + dstPitch;
   1.123 +
   1.124 +	do
   1.125 +	{
   1.126 +		u32 *bP = (u32 *) srcPtr;
   1.127 +		u32 *dP = (u32 *) dstPtr;
   1.128 +		u32 *nL = (u32 *) nextLine;
   1.129 +		u32	 currentPixel;
   1.130 +		u32	 nextPixel;
   1.131 +
   1.132 +		finish	  = (u8 *) bP + ((width + 2) << 1);
   1.133 +		nextPixel = *bP++;
   1.134 +
   1.135 +		do
   1.136 +		{
   1.137 +			currentPixel = nextPixel;
   1.138 +			nextPixel	 = *bP++;
   1.139 +
   1.140 +			u32 colorA, colorB;
   1.141 +
   1.142 +#ifdef WORDS_BIGENDIAN
   1.143 +			colorA = currentPixel >> 16;
   1.144 +			colorB = currentPixel & 0xFFFF;
   1.145 +#else
   1.146 +			colorA = currentPixel & 0xFFFF;
   1.147 +			colorB = currentPixel >> 16;
   1.148 +#endif
   1.149 +
   1.150 +			*(dP) = colorA = colorA | ((((colorA & colorMask) >> 1) +
   1.151 +			                            ((colorB & colorMask) >> 1))) << 16;
   1.152 +			colorA	= ((colorA & colorMask) >> 1);
   1.153 +			colorA += ((colorA & colorMask) >> 1);
   1.154 +			*(nL)	= colorA;
   1.155 +
   1.156 +			colorA = nextPixel & 0xFFFF;
   1.157 +
   1.158 +			*(dP + 1) = colorB = colorB | ((((colorA & colorMask) >> 1) +
   1.159 +			                                ((colorB & colorMask) >> 1))) << 16;
   1.160 +			colorB	= ((colorB & colorMask) >> 1);
   1.161 +			colorB += ((colorB & colorMask) >> 1);
   1.162 +
   1.163 +			*(nL + 1) = colorB;
   1.164 +
   1.165 +			dP += 2;
   1.166 +			nL += 2;
   1.167 +		}
   1.168 +		while ((u8 *) bP < finish);
   1.169 +
   1.170 +		srcPtr	 += srcPitch;
   1.171 +		dstPtr	 += dstPitch << 1;
   1.172 +		nextLine += dstPitch << 1;
   1.173 +	}
   1.174 +	while (--height);
   1.175 +}
   1.176 +
   1.177 +void ScanlinesTV32(u8 *srcPtr, u32 srcPitch, u8 * /* deltaPtr */,
   1.178 +                   u8 *dstPtr, u32 dstPitch, int width, int height)
   1.179 +{
   1.180 +	u8 *nextLine, *finish;
   1.181 +	u32 colorMask = ~RGB_LOW_BITS_MASK;
   1.182 +
   1.183 +	nextLine = dstPtr + dstPitch;
   1.184 +
   1.185 +	do
   1.186 +	{
   1.187 +		u32 *bP = (u32 *) srcPtr;
   1.188 +		u32 *dP = (u32 *) dstPtr;
   1.189 +		u32 *nL = (u32 *) nextLine;
   1.190 +		u32	 currentPixel;
   1.191 +		u32	 nextPixel;
   1.192 +
   1.193 +		finish	  = (u8 *) bP + ((width + 1) << 2);
   1.194 +		nextPixel = *bP++;
   1.195 +
   1.196 +		do
   1.197 +		{
   1.198 +			currentPixel = nextPixel;
   1.199 +			nextPixel	 = *bP++;
   1.200 +
   1.201 +			u32 colorA, colorB, temp;
   1.202 +
   1.203 +			colorA = currentPixel;
   1.204 +			colorB = nextPixel;
   1.205 +
   1.206 +			*(dP)	  = colorA;
   1.207 +			*(dP + 1) = temp = ((colorA & colorMask) >> 1) +
   1.208 +			                   ((colorB & colorMask) >> 1);
   1.209 +			temp	= ((temp & colorMask) >> 1);
   1.210 +			temp   += ((temp & colorMask) >> 1);
   1.211 +			colorA	= ((colorA & colorMask) >> 1);
   1.212 +			colorA += ((colorA & colorMask) >> 1);
   1.213 +
   1.214 +			*(nL)	  = colorA;
   1.215 +			*(nL + 1) = temp;
   1.216 +
   1.217 +			dP += 2;
   1.218 +			nL += 2;
   1.219 +		}
   1.220 +		while ((u8 *) bP < finish);
   1.221 +
   1.222 +		srcPtr	 += srcPitch;
   1.223 +		dstPtr	 += dstPitch << 1;
   1.224 +		nextLine += dstPitch << 1;
   1.225 +	}
   1.226 +	while (--height);
   1.227 +}
   1.228 +