Diffstat (limited to 'noncore/apps/opie-reader/Palm2QImage.cpp') (more/less context) (show whitespace changes)
| -rw-r--r-- | noncore/apps/opie-reader/Palm2QImage.cpp | 290 |
1 files changed, 290 insertions, 0 deletions
diff --git a/noncore/apps/opie-reader/Palm2QImage.cpp b/noncore/apps/opie-reader/Palm2QImage.cpp new file mode 100644 index 0000000..ef88cc5 --- a/dev/null +++ b/noncore/apps/opie-reader/Palm2QImage.cpp @@ -0,0 +1,290 @@ +/* -*- mode: c; indent-tabs-mode: nil; -*- */ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> /* for link */ +#include <sys/types.h> +#include <sys/stat.h> +#include <stdarg.h> + +#include <qimage.h> + +/***********************************************************************/ +/***********************************************************************/ +/***** *****/ +/***** Code to decode the Palm image format to JPEG *****/ +/***** *****/ +/***********************************************************************/ +/***********************************************************************/ + +#define READ_BIGENDIAN_SHORT(p) (((p)[0] << 8)|((p)[1])) +#define READ_BIGENDIAN_LONG(p) (((p)[0] << 24)|((p)[1] << 16)|((p)[2] << 8)|((p)[3])) + +#define PALM_IS_COMPRESSED_FLAG 0x8000 +#define PALM_HAS_COLORMAP_FLAG 0x4000 +#define PALM_HAS_TRANSPARENCY_FLAG 0x2000 +#define PALM_DIRECT_COLOR_FLAG 0x0400 +#define PALM_4_BYTE_FIELD_FLAG 0x0200 + +#define PALM_COMPRESSION_SCANLINE 0x00 +#define PALM_COMPRESSION_RLE 0x01 +#define PALM_COMPRESSION_PACKBITS 0x02 +#define PALM_COMPRESSION_NONE 0xFF + +#define PALM_COLORMAP_SIZE 232 + +typedef struct { + unsigned char red; + unsigned char green; + unsigned char blue; +} ColorMapEntry; + +static ColorMapEntry Palm8BitColormap[] = { + { 255, 255, 255 }, { 255, 204, 255 }, { 255, 153, 255 }, { 255, 102, 255 }, + { 255, 51, 255 }, { 255, 0, 255 }, { 255, 255, 204 }, { 255, 204, 204 }, + { 255, 153, 204 }, { 255, 102, 204 }, { 255, 51, 204 }, { 255, 0, 204 }, + { 255, 255, 153 }, { 255, 204, 153 }, { 255, 153, 153 }, { 255, 102, 153 }, + { 255, 51, 153 }, { 255, 0, 153 }, { 204, 255, 255 }, { 204, 204, 255 }, + { 204, 153, 255 }, { 204, 102, 255 }, { 204, 51, 255 }, { 204, 0, 255 }, + { 204, 255, 204 }, { 204, 204, 204 }, { 204, 153, 204 }, { 204, 102, 204 }, + { 204, 51, 204 }, { 204, 0, 204 }, { 204, 255, 153 }, { 204, 204, 153 }, + { 204, 153, 153 }, { 204, 102, 153 }, { 204, 51, 153 }, { 204, 0, 153 }, + { 153, 255, 255 }, { 153, 204, 255 }, { 153, 153, 255 }, { 153, 102, 255 }, + { 153, 51, 255 }, { 153, 0, 255 }, { 153, 255, 204 }, { 153, 204, 204 }, + { 153, 153, 204 }, { 153, 102, 204 }, { 153, 51, 204 }, { 153, 0, 204 }, + { 153, 255, 153 }, { 153, 204, 153 }, { 153, 153, 153 }, { 153, 102, 153 }, + { 153, 51, 153 }, { 153, 0, 153 }, { 102, 255, 255 }, { 102, 204, 255 }, + { 102, 153, 255 }, { 102, 102, 255 }, { 102, 51, 255 }, { 102, 0, 255 }, + { 102, 255, 204 }, { 102, 204, 204 }, { 102, 153, 204 }, { 102, 102, 204 }, + { 102, 51, 204 }, { 102, 0, 204 }, { 102, 255, 153 }, { 102, 204, 153 }, + { 102, 153, 153 }, { 102, 102, 153 }, { 102, 51, 153 }, { 102, 0, 153 }, + { 51, 255, 255 }, { 51, 204, 255 }, { 51, 153, 255 }, { 51, 102, 255 }, + { 51, 51, 255 }, { 51, 0, 255 }, { 51, 255, 204 }, { 51, 204, 204 }, + { 51, 153, 204 }, { 51, 102, 204 }, { 51, 51, 204 }, { 51, 0, 204 }, + { 51, 255, 153 }, { 51, 204, 153 }, { 51, 153, 153 }, { 51, 102, 153 }, + { 51, 51, 153 }, { 51, 0, 153 }, { 0, 255, 255 }, { 0, 204, 255 }, + { 0, 153, 255 }, { 0, 102, 255 }, { 0, 51, 255 }, { 0, 0, 255 }, + { 0, 255, 204 }, { 0, 204, 204 }, { 0, 153, 204 }, { 0, 102, 204 }, + { 0, 51, 204 }, { 0, 0, 204 }, { 0, 255, 153 }, { 0, 204, 153 }, + { 0, 153, 153 }, { 0, 102, 153 }, { 0, 51, 153 }, { 0, 0, 153 }, + { 255, 255, 102 }, { 255, 204, 102 }, { 255, 153, 102 }, { 255, 102, 102 }, + { 255, 51, 102 }, { 255, 0, 102 }, { 255, 255, 51 }, { 255, 204, 51 }, + { 255, 153, 51 }, { 255, 102, 51 }, { 255, 51, 51 }, { 255, 0, 51 }, + { 255, 255, 0 }, { 255, 204, 0 }, { 255, 153, 0 }, { 255, 102, 0 }, + { 255, 51, 0 }, { 255, 0, 0 }, { 204, 255, 102 }, { 204, 204, 102 }, + { 204, 153, 102 }, { 204, 102, 102 }, { 204, 51, 102 }, { 204, 0, 102 }, + { 204, 255, 51 }, { 204, 204, 51 }, { 204, 153, 51 }, { 204, 102, 51 }, + { 204, 51, 51 }, { 204, 0, 51 }, { 204, 255, 0 }, { 204, 204, 0 }, + { 204, 153, 0 }, { 204, 102, 0 }, { 204, 51, 0 }, { 204, 0, 0 }, + { 153, 255, 102 }, { 153, 204, 102 }, { 153, 153, 102 }, { 153, 102, 102 }, + { 153, 51, 102 }, { 153, 0, 102 }, { 153, 255, 51 }, { 153, 204, 51 }, + { 153, 153, 51 }, { 153, 102, 51 }, { 153, 51, 51 }, { 153, 0, 51 }, + { 153, 255, 0 }, { 153, 204, 0 }, { 153, 153, 0 }, { 153, 102, 0 }, + { 153, 51, 0 }, { 153, 0, 0 }, { 102, 255, 102 }, { 102, 204, 102 }, + { 102, 153, 102 }, { 102, 102, 102 }, { 102, 51, 102 }, { 102, 0, 102 }, + { 102, 255, 51 }, { 102, 204, 51 }, { 102, 153, 51 }, { 102, 102, 51 }, + { 102, 51, 51 }, { 102, 0, 51 }, { 102, 255, 0 }, { 102, 204, 0 }, + { 102, 153, 0 }, { 102, 102, 0 }, { 102, 51, 0 }, { 102, 0, 0 }, + { 51, 255, 102 }, { 51, 204, 102 }, { 51, 153, 102 }, { 51, 102, 102 }, + { 51, 51, 102 }, { 51, 0, 102 }, { 51, 255, 51 }, { 51, 204, 51 }, + { 51, 153, 51 }, { 51, 102, 51 }, { 51, 51, 51 }, { 51, 0, 51 }, + { 51, 255, 0 }, { 51, 204, 0 }, { 51, 153, 0 }, { 51, 102, 0 }, + { 51, 51, 0 }, { 51, 0, 0 }, { 0, 255, 102 }, { 0, 204, 102 }, + { 0, 153, 102 }, { 0, 102, 102 }, { 0, 51, 102 }, { 0, 0, 102 }, + { 0, 255, 51 }, { 0, 204, 51 }, { 0, 153, 51 }, { 0, 102, 51 }, + { 0, 51, 51 }, { 0, 0, 51 }, { 0, 255, 0 }, { 0, 204, 0 }, + { 0, 153, 0 }, { 0, 102, 0 }, { 0, 51, 0 }, { 17, 17, 17 }, + { 34, 34, 34 }, { 68, 68, 68 }, { 85, 85, 85 }, { 119, 119, 119 }, + { 136, 136, 136 }, { 170, 170, 170 }, { 187, 187, 187 }, { 221, 221, 221 }, + { 238, 238, 238 }, { 192, 192, 192 }, { 128, 0, 0 }, { 128, 0, 128 }, + { 0, 128, 0 }, { 0, 128, 128 }, { 0, 0, 0 }, { 0, 0, 0 }, + { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, + { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, + { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, + { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, + { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, + { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }}; + +static ColorMapEntry Palm1BitColormap[] = {{ 255, 255, 255 }, { 0, 0, 0 }}; + +static ColorMapEntry Palm2BitColormap[] = { + { 255, 255, 255 }, { 192, 192, 192 }, { 128, 128, 128 }, { 0, 0, 0 }}; + +static ColorMapEntry Palm4BitColormap[] = { + { 255, 255, 255 }, { 238, 238, 238 }, { 221, 221, 221 }, { 204, 204, 204 }, + { 187, 187, 187 }, { 170, 170, 170 }, { 153, 153, 153 }, { 136, 136, 136 }, + { 119, 119, 119 }, { 102, 102, 102 }, { 85, 85, 85 }, { 68, 68, 68 }, + { 51, 51, 51 }, { 34, 34, 34 }, { 17, 17, 17 }, { 0, 0, 0 }}; + +QImage* Palm2QImage + (unsigned char *image_bytes_in, int byte_count_in) +{ + unsigned int width, height, bytes_per_row, flags, next_depth_offset; + unsigned int bits_per_pixel, version, transparent_index, compression_type, i, j, inval, inbit, mask, incount; + unsigned int palm_red_bits, palm_green_bits, palm_blue_bits; + unsigned char *palm_ptr, *x_ptr, *imagedata, *inbyte, *rowbuf, *lastrow, + *imagedatastart, *palmimage; + ColorMapEntry *colormap; + + palmimage = image_bytes_in; + width = READ_BIGENDIAN_SHORT(palmimage + 0); + height = READ_BIGENDIAN_SHORT(palmimage + 2); + bytes_per_row = READ_BIGENDIAN_SHORT(palmimage + 4); + flags = READ_BIGENDIAN_SHORT(palmimage + 6); + bits_per_pixel = palmimage[8]; + version = palmimage[9]; + next_depth_offset = READ_BIGENDIAN_SHORT(palmimage + 10); + transparent_index = palmimage[12]; + compression_type = palmimage[13]; + /* bytes 14 and 15 are reserved by Palm and always 0 */ + +#if 0 + qDebug ("Palm image is %dx%d, %d bpp, version %d, flags 0x%x, compression %d", + width, height, bits_per_pixel, version, flags, compression_type); +#endif + + if (compression_type == PALM_COMPRESSION_PACKBITS) { + qDebug ("Image uses packbits compression; not yet supported"); + return NULL; + } else if ((compression_type != PALM_COMPRESSION_NONE) && + (compression_type != PALM_COMPRESSION_RLE) && + (compression_type != PALM_COMPRESSION_SCANLINE)) { + qDebug ("Image uses unknown compression, code 0x%x", compression_type); + return NULL; + } + + /* as of PalmOS 4.0, there are 6 different kinds of Palm pixmaps: + + 1, 2, or 4 bit grayscale + 8-bit StaticColor using the Palm standard colormap + 8-bit PseudoColor using a user-specified colormap + 16-bit DirectColor using 5 bits for red, 6 for green, and 5 for blue + + Each of these can be compressed with one of four compression schemes, + "RLE", "Scanline", "PackBits", or none. + + We begin by constructing the colormap. + */ + + if (flags & PALM_HAS_COLORMAP_FLAG) { + qDebug("Palm images with custom colormaps are not currently supported.\n"); + return NULL; + } else if (bits_per_pixel == 1) { + colormap = Palm1BitColormap; + imagedatastart = palmimage + 16; + } else if (bits_per_pixel == 2) { + colormap = Palm2BitColormap; + imagedatastart = palmimage + 16; + } else if (bits_per_pixel == 4) { + colormap = Palm4BitColormap; + imagedatastart = palmimage + 16; + } else if (bits_per_pixel == 8) { + colormap = Palm8BitColormap; + imagedatastart = palmimage + 16; + } else if (bits_per_pixel == 16 && (flags & PALM_DIRECT_COLOR_FLAG)) { + colormap = NULL; + palm_red_bits = palmimage[16]; + palm_green_bits = palmimage[17]; + palm_blue_bits = palmimage[18]; + if (palm_blue_bits > 8 || palm_green_bits > 8 || palm_red_bits > 8) { + qDebug("Can't handle this format DirectColor image -- too wide in some color (%d:%d:%d)\n", + palm_red_bits, palm_green_bits, palm_blue_bits); + return NULL; + } + if (bits_per_pixel > (8 * sizeof(unsigned long))) { + qDebug ("Can't handle this format DirectColor image -- too many bits per pixel (%d)\n", + bits_per_pixel); + return NULL; + } + imagedatastart = palmimage + 24; + } else { + qDebug("Unknown bits-per-pixel of %d encountered.\n", bits_per_pixel); + return NULL; + } + + QImage* qimage = new QImage(width, height, 16); + + /* row by row, uncompress the Palm image and copy it to the JPEG buffer */ + rowbuf = new unsigned char[bytes_per_row * width]; + lastrow = new unsigned char[bytes_per_row * width]; + + for (i=0, palm_ptr = imagedatastart , x_ptr = imagedata; i < height; ++i) { + + /* first, uncompress the Palm image */ + if ((flags & PALM_IS_COMPRESSED_FLAG) && (compression_type == PALM_COMPRESSION_RLE)) { + for (j = 0; j < bytes_per_row; ) { + incount = *palm_ptr++; + inval = *palm_ptr++; + memset(rowbuf + j, inval, incount); + j += incount; + } + } else if ((flags & PALM_IS_COMPRESSED_FLAG) && (compression_type == PALM_COMPRESSION_SCANLINE)) { + for (j = 0; j < bytes_per_row; j += 8) { + incount = *palm_ptr++; + inval = ((bytes_per_row - j) < 8) ? (bytes_per_row - j) : 8; + for (inbit = 0; inbit < inval; inbit += 1) { + if (incount & (1 << (7 - inbit))) + rowbuf[j + inbit] = *palm_ptr++; + else + rowbuf[j + inbit] = lastrow[j + inbit]; + } + } + memcpy (lastrow, rowbuf, bytes_per_row); + } else if (((flags & PALM_IS_COMPRESSED_FLAG) && + (compression_type == PALM_COMPRESSION_NONE)) || + (flags && PALM_IS_COMPRESSED_FLAG) == 0) { + memcpy (rowbuf, palm_ptr, bytes_per_row); + palm_ptr += bytes_per_row; + } + + /* next, write it to the GDK bitmap */ + if (colormap) { + mask = (1 << bits_per_pixel) - 1; + for (inbit = 8 - bits_per_pixel, inbyte = rowbuf, j = 0; j < width; ++j) { + inval = ((*inbyte) & (mask << inbit)) >> inbit; + /* correct for oddity of the 8-bit color Palm pixmap... */ + if ((bits_per_pixel == 8) && (inval == 0xFF)) inval = 231; + /* now lookup the correct color and set the pixel in the GTK bitmap */ + QRgb colour = qRgb(colormap[inval].red, colormap[inval].green, colormap[inval].blue); + qimage->setPixel(j, i, colour); + if (!inbit) { + ++inbyte; + inbit = 8 - bits_per_pixel; + } else { + inbit -= bits_per_pixel; + } + } + } else if (!colormap && + bits_per_pixel == 16) { + for (inbyte = rowbuf, j = 0; j < width; ++j) { + inval = (inbyte[0] << 8) | inbyte[1]; +#if 0 + qDebug ("pixel is %d,%d (%02x:%02x:%02x)", + j, i, + (inval >> (bits_per_pixel - palm_red_bits)) & ((1 << palm_red_bits) - 1), + (inval >> palm_blue_bits) & ((1 << palm_green_bits) - 1), + (inval >> 0) & ((1 << palm_blue_bits) - 1)); +#endif + QRgb colour = qRgb( + (inval >> (bits_per_pixel - palm_red_bits)) & ((1 << palm_red_bits) - 1), + (inval >> palm_blue_bits) & ((1 << palm_green_bits) - 1), + (inval >> 0) & ((1 << palm_blue_bits) - 1)); + qimage->setPixel(j, i, colour); + inbyte += 2; + } + } + } + + delete [] rowbuf; + delete [] lastrow; + + return qimage; +} + +QPixmap* hRule(int w, int h, unsigned char r, unsigned char g, unsigned char b) +{ +// qDebug("hrule [%d, %d]", w, h); + QPixmap* qimage = new QPixmap(w, h); + qimage->fill(QColor(r,g,b)); + return qimage; +} |