715 lines
14 KiB
C++
715 lines
14 KiB
C++
/*
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* This file is part of the DXX-Rebirth project <http://www.dxx-rebirth.com/>.
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* It is copyright by its individual contributors, as recorded in the
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* project's Git history. See COPYING.txt at the top level for license
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* terms and a link to the Git history.
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*/
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/* 16 bit decoding routines */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <cstdint>
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#include "decoders.h"
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#include "console.h"
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#include "dxxsconf.h"
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#include "compiler-array.h"
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#include "compiler-integer_sequence.h"
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static unsigned short *backBuf1, *backBuf2;
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static void dispatchDecoder16(unsigned short **pFrame, unsigned char codeType, const unsigned char **pData, const unsigned char **pOffData, int *pDataRemain, int *curXb, int *curYb);
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void decodeFrame16(unsigned char *pFrame, const unsigned char *pMap, int mapRemain, const unsigned char *pData, int dataRemain)
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{
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unsigned short offset;
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unsigned short *FramePtr = (unsigned short *)pFrame;
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int length;
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int op;
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int i, j;
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int xb, yb;
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backBuf1 = (unsigned short *)g_vBackBuf1;
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backBuf2 = (unsigned short *)g_vBackBuf2;
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xb = g_width >> 3;
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yb = g_height >> 3;
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offset = pData[0]|(pData[1]<<8);
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auto pOffData = pData + offset;
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pData += 2;
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auto pOrig = pData;
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length = offset - 2; /*dataRemain-2;*/
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for (j=0; j<yb; j++)
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{
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for (i=0; i<xb/2; i++)
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{
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op = (*pMap) & 0xf;
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dispatchDecoder16(&FramePtr, op, &pData, &pOffData, &dataRemain, &i, &j);
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/*
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if (FramePtr < backBuf1)
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con_printf(CON_CRITICAL, "danger! pointing out of bounds below after dispatch decoder: %d, %d (1) [%x]", i, j, (*pMap) & 0xf);
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else if (FramePtr >= backBuf1 + g_width*g_height)
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con_printf(CON_CRITICAL, "danger! pointing out of bounds above after dispatch decoder: %d, %d (1) [%x]", i, j, (*pMap) & 0xf);
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*/
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op = ((*pMap) >> 4) & 0xf;
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dispatchDecoder16(&FramePtr, op, &pData, &pOffData, &dataRemain, &i, &j);
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/*
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if (FramePtr < backBuf1)
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con_printf(CON_CRITICAL, "danger! pointing out of bounds below after dispatch decoder: %d, %d (2) [%x]", i, j, (*pMap) >> 4);
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else if (FramePtr >= backBuf1 + g_width*g_height)
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con_printf(CON_CRITICAL, "danger! pointing out of bounds above after dispatch decoder: %d, %d (2) [%x]", i, j, (*pMap) >> 4);
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*/
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++pMap;
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--mapRemain;
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}
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FramePtr += 7*g_width;
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}
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if ((length-(pData-pOrig)) != 0) {
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con_printf(CON_CRITICAL, "DEBUG: junk left over: %d,%d,%d", (int)(pData-pOrig), length, (int)(length-(pData-pOrig)));
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}
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}
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static uint16_t GETPIXEL(const unsigned char **buf, int off)
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{
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unsigned short val = (*buf)[0+off] | ((*buf)[1+off] << 8);
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return val;
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}
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static uint16_t GETPIXELI(const unsigned char **buf, int off)
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{
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unsigned short val = (*buf)[0+off] | ((*buf)[1+off] << 8);
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(*buf) += 2;
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return val;
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}
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struct position_t
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{
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int x, y;
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};
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static inline constexpr position_t relClose(int i)
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{
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return {(i & 0xf) - 8, (i >> 4) - 8};
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}
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static inline constexpr position_t relFar0(int i, int sign)
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{
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return {
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sign * (8 + (i % 7)),
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sign * (i / 7)
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};
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}
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static inline constexpr position_t relFar56(int i, int sign)
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{
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return {
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sign * (-14 + (i - 56) % 29),
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sign * (8 + (i - 56) / 29)
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};
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}
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static inline constexpr position_t relFar(int i, int sign)
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{
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return (i < 56) ? relFar0(i, sign) : relFar56(i, sign);
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}
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struct lookup_table_t
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{
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array<position_t, 256> close, far_p, far_n;
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};
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template <std::size_t... N>
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static inline constexpr lookup_table_t genLoopkupTable(index_sequence<N...>)
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{
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return lookup_table_t{
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{{relClose(N)...}},
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{{relFar(N, 1)...}},
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{{relFar(N, -1)...}}
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};
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}
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static const lookup_table_t lookup_table = genLoopkupTable(make_tree_index_sequence<256>());
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static void copyFrame(unsigned short *pDest, unsigned short *pSrc)
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{
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int i;
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for (i=0; i<8; i++)
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{
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memcpy(pDest, pSrc, 16);
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pDest += g_width;
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pSrc += g_width;
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}
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}
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static void patternRow4Pixels(unsigned short *pFrame,
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unsigned char pat0, unsigned char pat1,
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const array<uint16_t, 4> &p)
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{
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unsigned short mask=0x0003;
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unsigned short shift=0;
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unsigned short pattern = (pat1 << 8) | pat0;
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while (mask != 0)
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{
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*pFrame++ = p[(mask & pattern) >> shift];
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mask <<= 2;
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shift += 2;
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}
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}
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static void patternRow4Pixels2(unsigned short *pFrame,
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unsigned char pat0,
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const array<uint16_t, 4> &p)
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{
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unsigned char mask=0x03;
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unsigned char shift=0;
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unsigned short pel;
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/* ORIGINAL VERSION IS BUGGY
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int skip=1;
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while (mask != 0)
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{
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pel = p[(mask & pat0) >> shift];
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pFrame[0] = pel;
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pFrame[2] = pel;
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pFrame[g_width + 0] = pel;
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pFrame[g_width + 2] = pel;
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pFrame += skip;
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skip = 4 - skip;
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mask <<= 2;
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shift += 2;
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}
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*/
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while (mask != 0)
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{
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pel = p[(mask & pat0) >> shift];
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pFrame[0] = pel;
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pFrame[1] = pel;
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pFrame[g_width + 0] = pel;
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pFrame[g_width + 1] = pel;
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pFrame += 2;
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mask <<= 2;
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shift += 2;
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}
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}
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static void patternRow4Pixels2x1(unsigned short *pFrame, unsigned char pat,
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const array<uint16_t, 4> &p)
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{
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unsigned char mask=0x03;
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unsigned char shift=0;
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unsigned short pel;
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while (mask != 0)
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{
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pel = p[(mask & pat) >> shift];
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pFrame[0] = pel;
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pFrame[1] = pel;
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pFrame += 2;
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mask <<= 2;
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shift += 2;
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}
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}
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static void patternQuadrant4Pixels(unsigned short *pFrame,
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unsigned char pat0, unsigned char pat1, unsigned char pat2,
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unsigned char pat3, const array<uint16_t, 4> &p)
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{
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unsigned long mask = 0x00000003UL;
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int shift=0;
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int i;
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unsigned long pat = (pat3 << 24) | (pat2 << 16) | (pat1 << 8) | pat0;
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for (i=0; i<16; i++)
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{
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pFrame[i&3] = p[(pat & mask) >> shift];
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if ((i&3) == 3)
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pFrame += g_width;
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mask <<= 2;
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shift += 2;
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}
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}
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static void patternRow2Pixels(unsigned short *pFrame, unsigned char pat,
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const array<uint16_t, 4> &p)
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{
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unsigned char mask=0x01;
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while (mask != 0)
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{
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*pFrame++ = p[(mask & pat) ? 1 : 0];
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mask <<= 1;
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}
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}
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static void patternRow2Pixels2(unsigned short *pFrame, unsigned char pat,
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const array<uint16_t, 4> &p)
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{
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unsigned short pel;
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unsigned char mask=0x1;
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/* ORIGINAL VERSION IS BUGGY
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int skip=1;
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while (mask != 0x10)
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{
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pel = p[(mask & pat) ? 1 : 0];
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pFrame[0] = pel;
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pFrame[2] = pel;
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pFrame[g_width + 0] = pel;
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pFrame[g_width + 2] = pel;
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pFrame += skip;
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skip = 4 - skip;
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mask <<= 1;
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}
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*/
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while (mask != 0x10) {
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pel = p[(mask & pat) ? 1 : 0];
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pFrame[0] = pel;
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pFrame[1] = pel;
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pFrame[g_width + 0] = pel;
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pFrame[g_width + 1] = pel;
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pFrame += 2;
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mask <<= 1;
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}
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}
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static void patternQuadrant2Pixels(unsigned short *pFrame, unsigned char pat0,
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unsigned char pat1, const array<uint16_t, 4> &p)
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{
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unsigned short mask = 0x0001;
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int i;
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unsigned short pat = (pat1 << 8) | pat0;
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for (i=0; i<16; i++)
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{
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pFrame[i&3] = p[(pat & mask) ? 1 : 0];
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if ((i&3) == 3)
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pFrame += g_width;
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mask <<= 1;
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}
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}
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static void dispatchDecoder16(unsigned short **pFrame, unsigned char codeType, const unsigned char **pData, const unsigned char **pOffData, int *pDataRemain, int *curXb, int *curYb)
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{
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array<uint16_t, 4> p;
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array<uint8_t, 4> pat;
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int i, j, k;
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int x, y;
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unsigned short *pDstBak;
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pDstBak = *pFrame;
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switch(codeType)
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{
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case 0x0:
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copyFrame(*pFrame, *pFrame + (backBuf2 - backBuf1));
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case 0x1:
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break;
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case 0x2: /*
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relFar(*(*pOffData)++, 1, &x, &y);
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*/
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k = *(*pOffData)++;
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x = lookup_table.far_p[k].x;
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y = lookup_table.far_p[k].y;
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copyFrame(*pFrame, *pFrame + x + y*g_width);
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--*pDataRemain;
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break;
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case 0x3: /*
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relFar(*(*pOffData)++, -1, &x, &y);
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*/
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k = *(*pOffData)++;
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x = lookup_table.far_n[k].x;
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y = lookup_table.far_n[k].y;
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copyFrame(*pFrame, *pFrame + x + y*g_width);
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--*pDataRemain;
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break;
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case 0x4: /*
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relClose(*(*pOffData)++, &x, &y);
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*/
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k = *(*pOffData)++;
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x = lookup_table.close[k].x;
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y = lookup_table.close[k].y;
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copyFrame(*pFrame, *pFrame + (backBuf2 - backBuf1) + x + y*g_width);
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--*pDataRemain;
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break;
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case 0x5:
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x = (char)*(*pData)++;
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y = (char)*(*pData)++;
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copyFrame(*pFrame, *pFrame + (backBuf2 - backBuf1) + x + y*g_width);
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*pDataRemain -= 2;
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break;
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case 0x6:
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con_printf(CON_CRITICAL, "STUB: encoding 6 not tested");
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for (i=0; i<2; i++)
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{
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*pFrame += 16;
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if (++*curXb == (g_width >> 3))
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{
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*pFrame += 7*g_width;
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*curXb = 0;
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if (++*curYb == (g_height >> 3))
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return;
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}
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}
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break;
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case 0x7:
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p[0] = GETPIXELI(pData, 0);
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p[1] = GETPIXELI(pData, 0);
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if (!((p[0]/*|p[1]*/)&0x8000))
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{
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for (i=0; i<8; i++)
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{
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patternRow2Pixels(*pFrame, *(*pData), p);
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(*pData)++;
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*pFrame += g_width;
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}
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}
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else
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{
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for (i=0; i<2; i++)
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{
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patternRow2Pixels2(*pFrame, *(*pData) & 0xf, p);
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*pFrame += 2*g_width;
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patternRow2Pixels2(*pFrame, *(*pData) >> 4, p);
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(*pData)++;
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*pFrame += 2*g_width;
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}
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}
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break;
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case 0x8:
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p[0] = GETPIXEL(pData, 0);
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if (!(p[0] & 0x8000))
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{
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for (i=0; i<4; i++)
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{
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p[0] = GETPIXELI(pData, 0);
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p[1] = GETPIXELI(pData, 0);
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pat[0] = (*pData)[0];
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pat[1] = (*pData)[1];
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(*pData) += 2;
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patternQuadrant2Pixels(*pFrame, pat[0], pat[1], p);
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if (i & 1)
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*pFrame -= (4*g_width - 4);
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else
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*pFrame += 4*g_width;
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}
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} else {
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p[2] = GETPIXEL(pData, 8);
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if (!(p[2]&0x8000)) {
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for (i=0; i<4; i++)
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{
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if ((i & 1) == 0)
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{
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p[0] = GETPIXELI(pData, 0);
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p[1] = GETPIXELI(pData, 0);
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}
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pat[0] = *(*pData)++;
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pat[1] = *(*pData)++;
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patternQuadrant2Pixels(*pFrame, pat[0], pat[1], p);
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if (i & 1)
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*pFrame -= (4*g_width - 4);
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else
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*pFrame += 4*g_width;
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}
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} else {
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for (i=0; i<8; i++)
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{
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if ((i & 3) == 0)
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{
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p[0] = GETPIXELI(pData, 0);
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p[1] = GETPIXELI(pData, 0);
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}
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patternRow2Pixels(*pFrame, *(*pData), p);
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(*pData)++;
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*pFrame += g_width;
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}
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}
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}
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break;
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case 0x9:
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p[0] = GETPIXELI(pData, 0);
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p[1] = GETPIXELI(pData, 0);
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p[2] = GETPIXELI(pData, 0);
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p[3] = GETPIXELI(pData, 0);
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*pDataRemain -= 8;
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if (!(p[0] & 0x8000))
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{
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if (!(p[2] & 0x8000))
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{
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for (i=0; i<8; i++)
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{
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pat[0] = (*pData)[0];
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pat[1] = (*pData)[1];
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(*pData) += 2;
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patternRow4Pixels(*pFrame, pat[0], pat[1], p);
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*pFrame += g_width;
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}
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*pDataRemain -= 16;
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}
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else
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{
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patternRow4Pixels2(*pFrame, (*pData)[0], p);
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*pFrame += 2*g_width;
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patternRow4Pixels2(*pFrame, (*pData)[1], p);
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*pFrame += 2*g_width;
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patternRow4Pixels2(*pFrame, (*pData)[2], p);
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*pFrame += 2*g_width;
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patternRow4Pixels2(*pFrame, (*pData)[3], p);
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(*pData) += 4;
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*pDataRemain -= 4;
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}
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}
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else
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{
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if (!(p[2] & 0x8000))
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{
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for (i=0; i<8; i++)
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{
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pat[0] = (*pData)[0];
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(*pData) += 1;
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patternRow4Pixels2x1(*pFrame, pat[0], p);
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*pFrame += g_width;
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}
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*pDataRemain -= 8;
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}
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else
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{
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for (i=0; i<4; i++)
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{
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pat[0] = (*pData)[0];
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pat[1] = (*pData)[1];
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(*pData) += 2;
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patternRow4Pixels(*pFrame, pat[0], pat[1], p);
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*pFrame += g_width;
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patternRow4Pixels(*pFrame, pat[0], pat[1], p);
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*pFrame += g_width;
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}
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*pDataRemain -= 8;
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}
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}
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break;
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case 0xa:
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p[0] = GETPIXEL(pData, 0);
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if (!(p[0] & 0x8000))
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{
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for (i=0; i<4; i++)
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{
|
|
p[0] = GETPIXELI(pData, 0);
|
|
p[1] = GETPIXELI(pData, 0);
|
|
p[2] = GETPIXELI(pData, 0);
|
|
p[3] = GETPIXELI(pData, 0);
|
|
pat[0] = (*pData)[0];
|
|
pat[1] = (*pData)[1];
|
|
pat[2] = (*pData)[2];
|
|
pat[3] = (*pData)[3];
|
|
|
|
(*pData) += 4;
|
|
|
|
patternQuadrant4Pixels(*pFrame, pat[0], pat[1], pat[2], pat[3], p);
|
|
|
|
if (i & 1)
|
|
*pFrame -= (4*g_width - 4);
|
|
else
|
|
*pFrame += 4*g_width;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
p[0] = GETPIXEL(pData, 16);
|
|
|
|
if (!(p[0] & 0x8000))
|
|
{
|
|
for (i=0; i<4; i++)
|
|
{
|
|
if ((i&1) == 0)
|
|
{
|
|
p[0] = GETPIXELI(pData, 0);
|
|
p[1] = GETPIXELI(pData, 0);
|
|
p[2] = GETPIXELI(pData, 0);
|
|
p[3] = GETPIXELI(pData, 0);
|
|
}
|
|
|
|
pat[0] = (*pData)[0];
|
|
pat[1] = (*pData)[1];
|
|
pat[2] = (*pData)[2];
|
|
pat[3] = (*pData)[3];
|
|
|
|
(*pData) += 4;
|
|
|
|
patternQuadrant4Pixels(*pFrame, pat[0], pat[1], pat[2], pat[3], p);
|
|
|
|
if (i & 1)
|
|
*pFrame -= (4*g_width - 4);
|
|
else
|
|
*pFrame += 4*g_width;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (i=0; i<8; i++)
|
|
{
|
|
if ((i&3) == 0)
|
|
{
|
|
p[0] = GETPIXELI(pData, 0);
|
|
p[1] = GETPIXELI(pData, 0);
|
|
p[2] = GETPIXELI(pData, 0);
|
|
p[3] = GETPIXELI(pData, 0);
|
|
}
|
|
|
|
pat[0] = (*pData)[0];
|
|
pat[1] = (*pData)[1];
|
|
patternRow4Pixels(*pFrame, pat[0], pat[1], p);
|
|
*pFrame += g_width;
|
|
|
|
(*pData) += 2;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 0xb:
|
|
for (i=0; i<8; i++)
|
|
{
|
|
memcpy(*pFrame, *pData, 16);
|
|
*pFrame += g_width;
|
|
*pData += 16;
|
|
*pDataRemain -= 16;
|
|
}
|
|
break;
|
|
|
|
case 0xc:
|
|
for (i=0; i<4; i++)
|
|
{
|
|
p[0] = GETPIXEL(pData, 0);
|
|
p[1] = GETPIXEL(pData, 2);
|
|
p[2] = GETPIXEL(pData, 4);
|
|
p[3] = GETPIXEL(pData, 6);
|
|
|
|
for (j=0; j<2; j++)
|
|
{
|
|
for (k=0; k<4; k++)
|
|
{
|
|
(*pFrame)[j+2*k] = p[k];
|
|
(*pFrame)[g_width+j+2*k] = p[k];
|
|
}
|
|
*pFrame += g_width;
|
|
}
|
|
*pData += 8;
|
|
*pDataRemain -= 8;
|
|
}
|
|
break;
|
|
|
|
case 0xd:
|
|
for (i=0; i<2; i++)
|
|
{
|
|
p[0] = GETPIXEL(pData, 0);
|
|
p[1] = GETPIXEL(pData, 2);
|
|
|
|
for (j=0; j<4; j++)
|
|
{
|
|
for (k=0; k<4; k++)
|
|
{
|
|
(*pFrame)[k*g_width+j] = p[0];
|
|
(*pFrame)[k*g_width+j+4] = p[1];
|
|
}
|
|
}
|
|
|
|
*pFrame += 4*g_width;
|
|
|
|
*pData += 4;
|
|
*pDataRemain -= 4;
|
|
}
|
|
break;
|
|
|
|
case 0xe:
|
|
p[0] = GETPIXEL(pData, 0);
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
for (j = 0; j < 8; j++) {
|
|
(*pFrame)[j] = p[0];
|
|
}
|
|
|
|
*pFrame += g_width;
|
|
}
|
|
|
|
*pData += 2;
|
|
*pDataRemain -= 2;
|
|
|
|
break;
|
|
|
|
case 0xf:
|
|
p[0] = GETPIXEL(pData, 0);
|
|
p[1] = GETPIXEL(pData, 1);
|
|
|
|
for (i=0; i<8; i++)
|
|
{
|
|
for (j=0; j<8; j++)
|
|
{
|
|
(*pFrame)[j] = p[(i+j)&1];
|
|
}
|
|
*pFrame += g_width;
|
|
}
|
|
|
|
*pData += 4;
|
|
*pDataRemain -= 4;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
*pFrame = pDstBak+8;
|
|
}
|