Mercurial > vba-clojure

     1 #include "../Port.h"

     2 

     3 extern u32 RGB_LOW_BITS_MASK;

     4 

     5 void Pixelate2x16(u8 *srcPtr, u32 srcPitch, u8 *deltaPtr,

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

     7 {

     8 	u8 *nextLine, *finish;

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

    10 	colorMask = (colorMask >> 2) & (colorMask >> 1);

    11 

    12 	nextLine = dstPtr + dstPitch;

    13 

    14 	do

    15 	{

    16 		u32 *bP = (u32 *) srcPtr;

    17 		u32 *xP = (u32 *) deltaPtr;

    18 		u32 *dP = (u32 *) dstPtr;

    19 		u32 *nL = (u32 *) nextLine;

    20 		u32  currentPixel;

    21 		u32  nextPixel;

    22 		u32  currentDelta;

    23 		u32  nextDelta;

    24 

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

    26 		nextPixel = *bP++;

    27 		nextDelta = *xP++;

    28 

    29 		do

    30 		{

    31 			currentPixel = nextPixel;

    32 			currentDelta = nextDelta;

    33 			nextPixel    = *bP++;

    34 			nextDelta    = *xP++;

    35 

    36 			if ((nextPixel != nextDelta) || (currentPixel != currentDelta))

    37 			{

    38 				u32 colorA, colorB, product;

    39 

    40 				*(xP - 2) = currentPixel;

    41 #ifdef WORDS_BIGENDIAN

    42 				colorA = currentPixel >> 16;

    43 				colorB = currentPixel & 0xffff;

    44 #else

    45 				colorA = currentPixel & 0xffff;

    46 				colorB = currentPixel >> 16;

    47 #endif

    48 				product = (colorA >> 2) & colorMask;

    49 

    50 #ifdef WORDS_BIGENDIAN

    51 				*(nL) = (product << 16) | (product);

    52 				*(dP) = (colorA << 16) | product;

    53 #else

    54 				*(nL) = product | (product << 16);

    55 				*(dP) = colorA | (product << 16);

    56 #endif

    57 

    58 #ifdef WORDS_BIGENDIAN

    59 				colorA = nextPixel >> 16;

    60 #else

    61 				colorA = nextPixel & 0xffff;

    62 #endif

    63 				product = (colorB >> 2) & colorMask;

    64 #ifdef WORDS_BIGENDIAN

    65 				*(nL + 1) = (product << 16) | (product);

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

    67 #else

    68 				*(nL + 1) = (product) | (product << 16);

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

    70 #endif

    71 			}

    72 

    73 			dP += 2;

    74 			nL += 2;

    75 		}

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

    77 

    78 		deltaPtr += srcPitch;

    79 		srcPtr   += srcPitch;

    80 		dstPtr   += dstPitch << 1;

    81 		nextLine += dstPitch << 1;

    82 	}

    83 	while (--height);

    84 }

    85 

    86 void Pixelate2x32(u8 *srcPtr, u32 srcPitch, u8 * /* deltaPtr */,

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

    88 {

    89 	u8 *nextLine, *finish;

    90 	u32 colorMask = ((u32)~RGB_LOW_BITS_MASK >> 2) & ((u32)~RGB_LOW_BITS_MASK >> 1);

    91 

    92 	nextLine = dstPtr + dstPitch;

    93 

    94 	do

    95 	{

    96 		u32 *bP = (u32 *) srcPtr;

    97 		//    u32 *xP = (u32 *) deltaPtr;

    98 		u32 *dP = (u32 *) dstPtr;

    99 		u32 *nL = (u32 *) nextLine;

   100 		u32  currentPixel;

   101 		u32  nextPixel;

   102 

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

   104 		nextPixel = *bP++;

   105 

   106 		do

   107 		{

   108 			u32 product;

   109 

   110 			currentPixel = nextPixel;

   111 			nextPixel    = *bP++;

   112 			product = (currentPixel >> 2) & colorMask;

   113 			*(nL)   = product;

   114 			*(nL+1) = product;

   115 			*(dP)   = currentPixel;

   116 			*(dP+1) = product;

   117 

   118 			currentPixel = nextPixel;

   119 			nextPixel = *bP++;

   120 			product   = (currentPixel >> 2) & colorMask;

   121 			*(nL + 2) = product;

   122 			*(nL + 3) = product;

   123 			*(dP + 2) = currentPixel;

   124 			*(dP + 3) = product;

   125 

   126 			dP += 4;

   127 			nL += 4;

   128 		}

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

   130 

   131 		srcPtr   += srcPitch;

   132 		dstPtr   += dstPitch << 1;

   133 		nextLine += dstPitch << 1;

   134 	}

   135 	while (--height);

   136 }

   137 

   138 // generic Pixelate Nx magnification filter

   139 template <int magnification, typename ColorType>

   140 void PixelateNx(u8 *srcPtr, u32 srcPitch, u8 * /* deltaPtr */,

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

   142 {

   143 	ColorType colorMask = ((ColorType)~RGB_LOW_BITS_MASK >> 2) & ((ColorType)~RGB_LOW_BITS_MASK >> 1);

   144 

   145 	srcPitch      = srcPitch / sizeof(ColorType) - width;

   146 	u32 dstNextP  = dstPitch / sizeof(ColorType);

   147 	u32 dstNextL  = (dstNextP - width) * magnification; // skip to the next magnificated 'line'

   148 	dstNextP     -= magnification;

   149 

   150 	u32 offset    = (dstPitch + sizeof(ColorType)) * magnification - dstPitch;

   151 

   152 	ColorType *src   = (ColorType *)srcPtr;

   153 	ColorType *dst   = (ColorType *)dstPtr;

   154 

   155 	do // per src line

   156 	{

   157 		u8 *finishP = (u8 *)dst + offset;

   158 		for (int x = 0; x < width; ++x) // per pixel in line

   159 		{

   160 			ColorType col    = *src;

   161 			ColorType *dst2  = dst;

   162 			u8 *finishM = (u8 *)(dst + magnification);

   163 

   164 			ColorType product = (col >> 2) & colorMask;

   165 			do

   166 			{

   167 				*dst2 = product;

   168 			} while ((u8 *)++dst2 < finishM);

   169 			dst2    += dstNextP;

   170 			finishM += dstPitch;

   171 			do // dst magnificated pixel

   172 			{

   173 				*dst2++ = product;

   174 				do

   175 				{

   176 					*dst2 = col;

   177 				} while ((u8 *)++dst2 < finishM);

   178 				dst2    += dstNextP;

   179 				finishM += dstPitch;

   180 			} while ((u8 *)dst2 < finishP);

   181 

   182 			++src;

   183 			dst     += magnification;

   184 			finishP += magnification * sizeof(ColorType);

   185 		}

   186 		src += srcPitch;

   187 		dst += dstNextL;

   188 	} while (--height);

   189 }

   190 

   191 typedef void (*PixelateNxFP)(u8*, u32, u8*, u8*, u32, int, int);

   192 

   193 PixelateNxFP Pixelate3x16 = PixelateNx<3, u16>;

   194 PixelateNxFP Pixelate3x32 = PixelateNx<3, u32>;

   195 PixelateNxFP Pixelate4x16 = PixelateNx<4, u16>;

   196 PixelateNxFP Pixelate4x32 = PixelateNx<4, u32>;
author	Robert McIntyre <rlm@mit.edu>
date	Wed, 21 Mar 2012 03:24:18 -0500
parents	f9f4f1b99eed
children