From 3e924126b56c4d421e8263d25f6b14aa4ceed047 Mon Sep 17 00:00:00 2001 From: Reinhard Tartler Date: Sun, 13 Nov 2011 09:27:51 +0100 Subject: Imported nxcomp-3.1.0-4.tar.gz Summary: Imported nxcomp-3.1.0-4.tar.gz Keywords: Imported nxcomp-3.1.0-4.tar.gz into Git repository --- nxcomp/Pgn.cpp | 777 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 777 insertions(+) create mode 100755 nxcomp/Pgn.cpp (limited to 'nxcomp/Pgn.cpp') diff --git a/nxcomp/Pgn.cpp b/nxcomp/Pgn.cpp new file mode 100755 index 000000000..ee1e154af --- /dev/null +++ b/nxcomp/Pgn.cpp @@ -0,0 +1,777 @@ +/**************************************************************************/ +/* */ +/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/. */ +/* */ +/* NXCOMP, NX protocol compression and NX extensions to this software */ +/* are copyright of NoMachine. Redistribution and use of the present */ +/* software is allowed according to terms specified in the file LICENSE */ +/* which comes in the source distribution. */ +/* */ +/* Check http://www.nomachine.com/licensing.html for applicability. */ +/* */ +/* NX and NoMachine are trademarks of NoMachine S.r.l. */ +/* */ +/* All rights reserved. */ +/* */ +/**************************************************************************/ + +// +// This file obviously supports PNG +// decompression. It was renamed to +// avoid name clashes on Windows. +// + +#include + +#include +#include +#include + +#include "Unpack.h" +#include "Pgn.h" + +#define PANIC +#define WARNING +#undef TEST +#undef DEBUG + +#define RGB24_TO_PIXEL(bpp,r,g,b) \ + ((((CARD##bpp)(r) & 0xFF) * srcRedMax2 + 127) / 255 \ + << srcRedShift2 | \ + (((CARD##bpp)(g) & 0xFF) * srcGreenMax2 + 127) / 255 \ + << srcGreenShift2 | \ + (((CARD##bpp)(b) & 0xFF) * srcBlueMax2 + 127) / 255 \ + << srcBlueShift2) + +#define RGB24_TO_PIXEL32(r,g,b) \ + (((CARD32)(r) & 0xFF) << srcRedShift2 | \ + ((CARD32)(g) & 0xFF) << srcGreenShift2 | \ + ((CARD32)(b) & 0xFF) << srcBlueShift2) + +// +// Functions from Unpack.cpp +// + +extern int Unpack32To32(const T_colormask *colormask, const unsigned int *data, + unsigned int *out, unsigned int *end); + +extern int Unpack24To24(const T_colormask *colormask, const unsigned char *data, + unsigned char *out, unsigned char *end); + +extern int Unpack16To16(const T_colormask *colormask, const unsigned char *data, + unsigned char *out, unsigned char *end); + +// +// Local functions used for the png decompression. +// + +static int DecompressPng16(unsigned char *compressedData, int compressedLen, + unsigned int w, unsigned int h, unsigned char *dstBuf, + int byteOrder); + +static int DecompressPng24(unsigned char *compressedData, int compressedLen, + unsigned int w, unsigned int h, unsigned char *dstBuf, + int byteOrder); + +static int DecompressPng32(unsigned char *compressedData, int compressedLen, + unsigned int w, unsigned int h, unsigned char *dstBuf, + int byteOrder); + +static void PngReadData(png_structp png_ptr, png_bytep data, png_size_t length); + +// +// Colormap stuff. +// + +CARD16 srcRedMax2, srcGreenMax2, srcBlueMax2; +CARD8 srcRedShift2, srcGreenShift2, srcBlueShift2; + +// +// Attributes used for the png decompression. +// + +static char *tmpBuf; +static int tmpBufSize = 0; +static int streamPos; + +int UnpackPng(T_geometry *geometry, unsigned char method, unsigned char *srcData, + int srcSize, int dstBpp, int dstWidth, int dstHeight, + unsigned char *dstData, int dstSize) +{ + int byteOrder = geometry -> image_byte_order; + + // + // Check if data is coming from a failed unsplit. + // + + if (srcSize < 2 || srcData[0] == SPLIT_PATTERN && + srcData[1] == SPLIT_PATTERN) + { + #ifdef WARNING + *logofs << "UnpackPng: WARNING! Skipping unpack of dummy data.\n" + << logofs_flush; + #endif + + return -1; + } + + #ifdef DEBUG + *logofs << "UnpackPng: Decompressing image with " + << "srcSize " << srcSize << " and bpp " + << dstBpp << ".\n" << logofs_flush; + #endif + + srcRedShift2 = ffs(geometry -> red_mask) - 1; + srcGreenShift2 = ffs(geometry -> green_mask) - 1; + srcBlueShift2 = ffs(geometry -> blue_mask) - 1; + srcRedMax2 = geometry -> red_mask >> srcRedShift2; + srcGreenMax2 = geometry -> green_mask >> srcGreenShift2; + srcBlueMax2 = geometry -> blue_mask >> srcBlueShift2; + + // + // Make enough space in the temporary + // buffer to have one complete row of + // the image with 3 bytes per pixel. + // + + tmpBufSize = dstWidth * 3; + tmpBuf = new char [tmpBufSize]; + + if (tmpBuf == NULL) + { + #ifdef PANIC + *logofs << "UnpackPng: PANIC! Cannot allocate " + << dstWidth * 3 << " bytes for PNG " + << "decompressed data.\n" << logofs_flush; + #endif + + delete [] tmpBuf; + + return -1; + } + + int result = 1; + + switch (dstBpp) + { + case 8: + { + // + // Simply move the data from srcData to dstData + // taking into consideration the correct padding. + // + + int row; + + unsigned char * dstBuff = dstData; + unsigned char * srcBuff = srcData; + + for (row = 0; row < dstHeight; row++) + { + memcpy(dstBuff, srcBuff, dstWidth ); + + dstBuff += RoundUp4(dstWidth); + srcBuff += dstWidth; + } + } + case 16: + { + result = DecompressPng16(srcData, srcSize, dstWidth, + dstHeight, dstData, byteOrder); + break; + } + case 24: + { + result = DecompressPng24(srcData, srcSize, dstWidth, + dstHeight, dstData, byteOrder); + break; + } + case 32: + { + result = DecompressPng32(srcData, srcSize, dstWidth, + dstHeight, dstData, byteOrder); + break; + } + default: + { + #ifdef PANIC + *logofs << "UnpackPng: PANIC! Error in PNG compression. " + << " Unsupported Bpp value " << dstBpp + << " for the PNG compression" + << ".\n" << logofs_flush; + #endif + + delete [] tmpBuf; + + result = -1; + } + } + + if (result == -1) + { + delete [] tmpBuf; + + return result; + } + + // + // Apply the correction for the brightness + // + + int maskMethod; + + switch (method) + { + case PACK_PNG_8_COLORS: + { + maskMethod = MASK_8_COLORS; + + break; + } + case PACK_PNG_64_COLORS: + { + maskMethod = MASK_64_COLORS; + + break; + } + case PACK_PNG_256_COLORS: + { + maskMethod = MASK_256_COLORS; + + break; + } + case PACK_PNG_512_COLORS: + { + maskMethod = MASK_512_COLORS; + + break; + } + case PACK_PNG_4K_COLORS: + { + maskMethod = MASK_4K_COLORS; + + break; + } + case PACK_PNG_32K_COLORS: + { + maskMethod = MASK_32K_COLORS; + + break; + } + case PACK_PNG_64K_COLORS: + { + maskMethod = MASK_64K_COLORS; + + break; + } + case PACK_PNG_256K_COLORS: + { + maskMethod = MASK_256K_COLORS; + + break; + } + case PACK_PNG_2M_COLORS: + { + maskMethod = MASK_2M_COLORS; + + break; + } + case PACK_PNG_16M_COLORS: + { + maskMethod = MASK_16M_COLORS; + + break; + } + default: + { + #ifdef PANIC + *logofs << "DecompressPng16: PANIC! " + << " No matching decompression method.\n" + << logofs_flush; + #endif + + delete [] tmpBuf; + + return -1; + } + } + + const T_colormask *colorMask = MethodColorMask(maskMethod); + + unsigned char *dstBuff = dstData; + + switch (dstBpp) + { + case 16: + { + Unpack16To16(colorMask, dstBuff, dstBuff, dstBuff + dstSize); + + break; + } + case 24: + { + break; + } + case 32: + { + Unpack32To32(colorMask, (unsigned int *)dstBuff, (unsigned int *)dstBuff, + (unsigned int *)(dstBuff + dstSize)); + break; + } + default: + { + #ifdef PANIC + *logofs << "DecompressPng16: PANIC! " + << " No matching destination bits per plane.\n" + << logofs_flush; + #endif + + delete [] tmpBuf; + + return -1; + } + } + + delete [] tmpBuf; + + return 1; +} + + +// +// Functions that actually do +// the PNG decompression. +// + +int DecompressPng16(unsigned char *compressedData, int compressedLen, + unsigned int w, unsigned int h, unsigned char *dstBuf, int byteOrder) +{ + unsigned char *data; + unsigned int dx, dy; + + png_structp pngPtr; + png_infop infoPtr; + png_bytep rowPointers; + + + streamPos = 0; + + pngPtr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); + + if (!pngPtr) + { + #ifdef PANIC + *logofs << "DecompressPng16: PANIC! " + << " Failed png_create_read_struct operation" + << ".\n" << logofs_flush; + #endif + + return -1; + } + + infoPtr = png_create_info_struct(pngPtr); + + if (!infoPtr) + { + #ifdef PANIC + *logofs << "DecompressPng16: PANIC! " + << "Failed png_create_info_struct operation" + << ".\n" << logofs_flush; + #endif + + png_destroy_read_struct(&pngPtr, NULL, NULL); + + return -1; + } + + if (setjmp(png_jmpbuf(pngPtr))) + { + #ifdef PANIC + *logofs << "DecompressPng16: PANIC! " + << "Error during IO initialization" + << ".\n" << logofs_flush; + #endif + + png_destroy_read_struct(&pngPtr, &infoPtr, NULL); + + return -1; + } + + png_set_read_fn(pngPtr, (void *)compressedData, PngReadData); + + if (setjmp(png_jmpbuf(pngPtr))) + { + #ifdef PANIC + *logofs << "DecompressPng16: PANIC! " + << "Error during read of PNG header" + << ".\n" << logofs_flush; + #endif + + png_destroy_read_struct(&pngPtr, &infoPtr, NULL); + + return -1; + } + + png_read_info(pngPtr, infoPtr); + + if (infoPtr -> color_type == PNG_COLOR_TYPE_PALETTE) + { + png_set_expand(pngPtr); + } + + // + // data points to dstBuf which is + // already padded correctly for the final + // image to put + // + + data = dstBuf; + rowPointers = (png_byte *) tmpBuf; + + // + // We use setjmp() to save our context. + // The PNG library will call longjmp() + // in case of error. + // + + if (setjmp(png_jmpbuf(pngPtr))) + { + #ifdef PANIC + *logofs << "DecompressPng16: PANIC! " + << "Error during read of PNG rows" + << ".\n" << logofs_flush; + #endif + + png_destroy_read_struct(&pngPtr, &infoPtr, NULL); + + return -1; + } + + unsigned long pixel; + + for (dy = 0; dy < h; dy++) + { + png_read_row(pngPtr, rowPointers, NULL); + + for (dx = 0; dx < w; dx++) + { + pixel = RGB24_TO_PIXEL(16, tmpBuf[dx*3], tmpBuf[dx*3+1], tmpBuf[dx*3+2]); + } + + // + // Move pixelPtr at the beginning of the + // next line. + // + + data = data + (RoundUp4(w * 2) - w * 2); + } + + png_destroy_read_struct(&pngPtr, &infoPtr,NULL); + + #ifdef DEBUG + *logofs << "DecompressPng16: Decompression finished." + << dy << " lines handled.\n" + << logofs_flush; + #endif + + return 1; +} + +int DecompressPng24(unsigned char *compressedData, int compressedLen, + unsigned int w, unsigned int h, unsigned char *dstBuf, int byteOrder) +{ + static CARD8 *pixelPtr = NULL; + unsigned int dx, dy; + + png_structp pngPtr; + png_infop infoPtr; + png_bytep rowPointers; + + + streamPos = 0; + + pngPtr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); + + if (!pngPtr) + { + #ifdef PANIC + *logofs << "DecompressPng24: PANIC! " + << "Failed png_create_read_struct operation" + << ".\n" << logofs_flush; + #endif + + return -1; + } + + infoPtr = png_create_info_struct(pngPtr); + + if (!infoPtr) + { + #ifdef PANIC + *logofs << "DecompressPng24: PANIC! " + << "Failed png_create_info_struct operation" + << ".\n" << logofs_flush; + #endif + + png_destroy_read_struct(&pngPtr, NULL, NULL); + + return -1; + } + + if (setjmp(png_jmpbuf(pngPtr))) + { + #ifdef PANIC + *logofs << "DecompressPng24: PANIC! " + << "Error during IO initialization" + << ".\n" << logofs_flush; + #endif + + png_destroy_read_struct(&pngPtr, &infoPtr, NULL); + + return -1; + } + + png_set_read_fn(pngPtr, (void *)compressedData, PngReadData); + + if (setjmp(png_jmpbuf(pngPtr))) + { + #ifdef PANIC + *logofs << "DecompressPng24: PANIC! " + << "Error during read of PNG header" + << ".\n" << logofs_flush; + #endif + + png_destroy_read_struct(&pngPtr, &infoPtr, NULL); + + return -1; + } + + png_read_info( pngPtr, infoPtr ) ; + + if (infoPtr -> color_type == PNG_COLOR_TYPE_PALETTE) + { + png_set_expand(pngPtr); + } + + // + // PixelPtr points to dstBuf which is + // already padded correctly for the final + // image to put + // + + pixelPtr = (CARD8 *) dstBuf; + + rowPointers = (png_byte *)tmpBuf; + + if (setjmp(png_jmpbuf(pngPtr))) + { + #ifdef PANIC + *logofs << "DecompressPng24: PANIC! " + << "Error during read of PNG rows" + << ".\n" << logofs_flush; + #endif + + png_destroy_read_struct(&pngPtr, &infoPtr, NULL); + + return -1; + } + + for (dy = 0; dy < h; dy++) + { + png_read_row(pngPtr, rowPointers, NULL); + + for (dx = 0; dx < w; dx++) + { + // + // Follow the server byte order when arranging data. + // + + if (byteOrder == LSBFirst) + { + pixelPtr[0] = tmpBuf[dx * 3]; + pixelPtr[1] = tmpBuf[dx * 3 + 1]; + pixelPtr[2] = tmpBuf[dx * 3 + 2]; + } + else + { + pixelPtr[2] = tmpBuf[dx * 3]; + pixelPtr[1] = tmpBuf[dx * 3 + 1]; + pixelPtr[0] = tmpBuf[dx * 3 + 2]; + } + + pixelPtr += 3; + } + + // + // Go to the next line. + // + + pixelPtr = (CARD8 *) (((char *) pixelPtr) + (RoundUp4(w * 3) - w * 3)); + } + + png_destroy_read_struct(&pngPtr, &infoPtr,NULL); + + #ifdef DEBUG + *logofs << "DecompressPng24: Decompression finished." + << dy << " lines handled.\n" + << logofs_flush; + #endif + + return 1; +} + +int DecompressPng32(unsigned char *compressedData, int compressedLen, + unsigned int w, unsigned int h, unsigned char *dstBuf, int byteOrder) +{ + unsigned char *data; + + unsigned int dx, dy; + + png_structp pngPtr; + png_infop infoPtr; + png_bytep rowPointers; + + streamPos = 0; + + pngPtr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); + + if (!pngPtr) + { + #ifdef PANIC + *logofs << "DecompressPng32: PANIC! " + << "Failed png_create_read_struct operation" + << ".\n" << logofs_flush; + #endif + + return -1; + } + + infoPtr = png_create_info_struct(pngPtr); + + if (!infoPtr) + { + #ifdef PANIC + *logofs << "DecompressPng32: PANIC! " + << "Failed png_create_info_struct operation." + << ".\n" << logofs_flush; + #endif + + png_destroy_read_struct(&pngPtr, NULL, NULL); + + return -1; + } + + if (setjmp(png_jmpbuf(pngPtr))) + { + #ifdef PANIC + *logofs << "DecompressPng32: PANIC! " + << "Error during IO initialization" + << ".\n" << logofs_flush; + #endif + + png_destroy_read_struct(&pngPtr, &infoPtr, NULL); + + return -1; + } + + png_set_read_fn(pngPtr, (void *)compressedData, PngReadData); + + if (setjmp(png_jmpbuf(pngPtr))) + { + #ifdef PANIC + *logofs << "DecompressPng32: PANIC! " + << "Error during read of PNG header" + << ".\n" << logofs_flush; + #endif + + png_destroy_read_struct(&pngPtr, &infoPtr, NULL); + + return -1; + } + + png_read_info(pngPtr, infoPtr) ; + + + if (infoPtr -> color_type == PNG_COLOR_TYPE_PALETTE) + { + png_set_expand(pngPtr); + } + + // + // data points to dstBuf which is + // already padded correctly for the final + // image to put + // + + data = dstBuf; + + rowPointers = (png_byte *) tmpBuf; + + if (setjmp(png_jmpbuf(pngPtr))) + { + #ifdef PANIC + *logofs << "DecompressPng32: PANIC! " + << "Error during read of PNG rows" + << ".\n" << logofs_flush; + #endif + + png_destroy_read_struct(&pngPtr, &infoPtr, NULL); + + return -1; + } + + unsigned long pixel; + + int i; + + for (dy = 0; dy < h; dy++) + { + png_read_row(pngPtr, rowPointers, NULL); + + for (dx = 0; dx < w; dx++) + { + pixel = RGB24_TO_PIXEL(32, tmpBuf[dx * 3], tmpBuf[dx * 3 + 1], + tmpBuf[dx * 3 + 2]); + + // + // Follow the server byte order when arranging data. + // + + if (byteOrder == LSBFirst) + { + for (i = 0; i < 4; i++) + { + data[i] = (unsigned char)(pixel & 0xff); + pixel >>= 8; + } + } + else + { + for (i = 3; i >= 0; i--) + { + data[i] = (unsigned char) (pixel & 0xff); + pixel >>= 8; + } + } + + data += 4; + } + } + + png_destroy_read_struct(&pngPtr, &infoPtr,NULL); + + #ifdef DEBUG + *logofs << "DecompressPng32: Decompression finished." + << dy << " lines handled.\n" + << logofs_flush; + #endif + + return 1; +} + +static void PngReadData(png_structp png_ptr, png_bytep data, png_size_t length) +{ + memcpy((char *) data, (char *) png_get_io_ptr(png_ptr) + streamPos, length); + + streamPos += length; +} -- cgit v1.2.3