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/* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and /or associated documentation files
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* (the "Materials "), to deal in the Materials without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Materials,
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* and to permit persons to whom the Materials are furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Materials.
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*
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* THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE MATERIALS OR
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* THE USE OR OTHER DEALINGS IN THE MATERIALS.
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*/
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#ifndef __RIUTILS_H_
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# include "riUtils.h"
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#endif
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#include <string.h>
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namespace OpenVGRI
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{
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/**
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* \brief Sets mem areas to byte(s) in c.
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* \param dst Destination pointer.
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* \param c Data to set into dst.
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* \param nElements Amount of elements to set.
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* \param nBytesPerElement Amount of bytes for each element.
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* \note This is moslty an image-settings support function. It is assumed that several
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* bytes / elements can be set at once, especially in 3-byte case.
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*/
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void riMemSet32(void* dst, RIuint32 c, size_t nElements, size_t nBytesPerElement)
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{
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// \todo This function should be called from a function that handles npot element sizes.
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// \todo Investigate the status of (open) std::fill implementations. Some of that code
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// did not _seem_ to bundle sets or use SSE, etc.
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// \todo Use SSE instructions on Intel?
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RI_ASSERT(dst);
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RI_ASSERT(nElements);
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switch(nBytesPerElement)
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{
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case 4:
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{
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RIuint32* ptr = (RIuint32*)dst;
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do {
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*ptr++ = c;
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} while(--nElements);
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break;
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}
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case 3:
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{
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// \todo Endianness.
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RIuint8* ptr = (RIuint8*)dst;
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RIuint8 b[3];
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b[0] = c & 0xff;
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b[1] = (c >> 8)&0xff;
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b[2] = (c >> 16)&0xff;
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do {
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*ptr++ = b[0];
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*ptr++ = b[1];
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*ptr++ = b[2];
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} while(--nElements);
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break;
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}
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case 2:
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{
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size_t dws = nElements / 2;
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if (dws)
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{
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RIuint32* ptr32 = (RIuint32*)dst;
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dst = (void*)(((RIuint8*)dst + dws * 4));
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RIuint32 dw = c | (c<<16);
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do {
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*ptr32++ = dw;
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} while(--dws);
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nElements &= 0x01;
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}
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if (nElements)
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{
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RIuint16 *ptr16 = (RIuint16*)dst;
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const RIuint16 w = (RIuint16)c;
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do {
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*ptr16++ = w;
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} while(--nElements);
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}
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break;
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}
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default:
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{
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RI_ASSERT(nBytesPerElement == 1);
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memset(dst, c, nElements);
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break;
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}
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}
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}
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/**
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* \brief Insert bits into an array of 32-bit integers.
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* \param hashSize Size of array in bytes.
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* \param bits Actual bits to insert.
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* \param bitSize Amount of bits to insert (max 32).
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* \param bitPtr Pointer to first bit to insert [0 .. (hashSize*8)-1]
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*/
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int riInsertBits32(RIuint32* hash, size_t hashSize, RIuint32 bits, RIuint32 bitSize, int bitPtr)
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{
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RI_ASSERT(bitSize > 0 && bitSize <= 32);
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RI_ASSERT(bits < (1u<<bitSize));
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RI_ASSERT((bitPtr + bitSize) < (hashSize * 32));
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int idw = bitPtr >> 5;
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int ib = bitPtr - (idw << 5);
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if ((ib + bitSize) > 32)
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{
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int rb = ((ib + bitSize) - 32) + 1;
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RI_ASSERT(rb > 0);
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hash[idw] |= (bits << ib);
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hash[idw] |= (bits >> rb);
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}
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else
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{
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int new_ib = (ib + bitSize) & 0x1f;
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RI_ASSERT((ib + bitSize == 32) ? new_ib == 0 : true);
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hash[idw] |= (bits << ib);
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}
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return bitPtr + bitSize;
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}
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/**
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* \brief Convert an image format to (internal) index.
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*/
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int riVGImageFormatToIndex(VGImageFormat format)
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{
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switch(format)
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{
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/* RGB{A,X} channel ordering */
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case VG_sRGBX_8888:
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return 0;
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case VG_sRGBA_8888:
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return 1;
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case VG_sRGBA_8888_PRE:
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return 2;
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case VG_sRGB_565:
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return 3;
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case VG_sRGBA_5551:
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return 4;
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case VG_sRGBA_4444:
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return 5;
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case VG_sL_8:
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return 6;
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case VG_lRGBX_8888:
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return 7;
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case VG_lRGBA_8888:
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return 8;
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case VG_lRGBA_8888_PRE:
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return 9;
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case VG_lL_8:
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return 10;
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case VG_A_8:
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return 11;
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case VG_BW_1:
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return 12;
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case VG_A_1:
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return 13;
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case VG_A_4:
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return 14;
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/* {A,X}RGB channel ordering */
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case VG_sXRGB_8888:
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return 15;
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case VG_sARGB_8888:
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return 16;
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case VG_sARGB_8888_PRE:
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return 17;
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case VG_sARGB_1555:
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return 18;
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case VG_sARGB_4444:
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return 19;
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case VG_lXRGB_8888:
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return 20;
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case VG_lARGB_8888:
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return 21;
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case VG_lARGB_8888_PRE:
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return 22;
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/* BGR{A,X} channel ordering */
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case VG_sBGRX_8888:
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return 23;
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case VG_sBGRA_8888:
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return 24;
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case VG_sBGRA_8888_PRE:
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return 25;
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case VG_sBGR_565:
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return 26;
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case VG_sBGRA_5551:
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return 27;
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case VG_sBGRA_4444:
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return 28;
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case VG_lBGRX_8888:
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return 29;
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case VG_lBGRA_8888:
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return 30;
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case VG_lBGRA_8888_PRE:
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return 31;
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/* {A,X}BGR channel ordering */
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case VG_sXBGR_8888:
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return 32;
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case VG_sABGR_8888:
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return 33;
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case VG_sABGR_8888_PRE:
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return 34;
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case VG_sABGR_1555:
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return 35;
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case VG_sABGR_4444:
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return 36;
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case VG_lXBGR_8888:
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return 37;
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case VG_lABGR_8888:
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return 38;
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default:
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RI_ASSERT(format == VG_lABGR_8888_PRE);
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return 39;
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}
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}
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}
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