diff options
author | Jonathan Kew <jfkthame@googlemail.com> | 2006-09-29 15:15:10 +0000 |
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committer | Jonathan Kew <jfkthame@googlemail.com> | 2006-09-29 15:15:10 +0000 |
commit | 387cf3625583fb046baf756f72f188924f35cfe2 (patch) | |
tree | 6e09f2e03b9c590a9f14689dfdb4d77ed66e773d /Build/source/texk/xdvipdfmx/src/bmpimage.c | |
parent | fe77ff4cdab25604b424a273c726920830f63abc (diff) |
adding xdvipdfmx sources
git-svn-id: svn://tug.org/texlive/trunk@2220 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/texk/xdvipdfmx/src/bmpimage.c')
-rw-r--r-- | Build/source/texk/xdvipdfmx/src/bmpimage.c | 466 |
1 files changed, 466 insertions, 0 deletions
diff --git a/Build/source/texk/xdvipdfmx/src/bmpimage.c b/Build/source/texk/xdvipdfmx/src/bmpimage.c new file mode 100644 index 00000000000..3897275ca06 --- /dev/null +++ b/Build/source/texk/xdvipdfmx/src/bmpimage.c @@ -0,0 +1,466 @@ +/* $Header: /home/cvsroot/dvipdfmx/src/bmpimage.c,v 1.2 2004/07/27 12:08:46 hirata Exp $ + + This is dvipdfmx, an eXtended version of dvipdfm by Mark A. Wicks. + + Copyright (C) 2002 by Jin-Hwan Cho and Shunsaku Hirata, + the dvipdfmx project team <dvipdfmx@project.ktug.or.kr> + + Copyright (C) 1998, 1999 by Mark A. Wicks <mwicks@kettering.edu> + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. +*/ + +#if HAVE_CONFIG_H +#include "config.h" +#endif + +/* + * BMP SUPPORT: + */ + +#include "system.h" +#include "error.h" +#include "mem.h" + +#include "pdfobj.h" + +#include "bmpimage.h" + +#define DIB_FILE_HEADER_SIZE 14 +#define DIB_CORE_HEADER_SIZE 14 +#define DIB_INFO_HEADER_SIZE 40 + +#define DIB_COMPRESS_NONE 0 +#define DIB_COMPRESS_RLE8 1 +#define DIB_COMPRESS_RLE4 2 + +#define DIB_HEADER_SIZE_MAX (DIB_FILE_HEADER_SIZE+DIB_INFO_HEADER_SIZE) + +static long read_raster_rle8 (unsigned char *data_ptr, + long width, long height, FILE *fp); +static long read_raster_rle4 (unsigned char *data_ptr, + long width, long height, FILE *fp); + +int +check_for_bmp (FILE *fp) +{ + unsigned char sigbytes[2]; + + if (!fp) + return 0; + + rewind(fp); + if (fread(sigbytes, 1, sizeof(sigbytes), fp) != sizeof(sigbytes) || + sigbytes[0] != 'B' || sigbytes[1] != 'M') + return 0; + else + return 1; + + return 0; +} + +int +bmp_include_image (pdf_ximage *ximage, FILE *fp) +{ + pdf_obj *stream, *stream_dict, *colorspace; + ximage_info info; + unsigned char buf[DIB_HEADER_SIZE_MAX+4]; + unsigned char *p; + long offset, fsize, hsize, compression; + long psize; /* Bytes per palette color: 3 for OS2, 4 for Win */ + unsigned short bit_count; /* Bits per pix */ + int num_palette, flip; + int i; + unsigned long biXPelsPerMeter, biYPelsPerMeter; + + pdf_ximage_init_image_info(&info); + + stream = stream_dict = colorspace = NULL; + p = buf; + + rewind(fp); + if (fread(buf, 1, DIB_FILE_HEADER_SIZE + 4, fp) + != DIB_FILE_HEADER_SIZE + 4) { + WARN("Could not read BMP file header..."); + } + + if (p[0] != 'B' || p[1] != 'M') { + WARN("File not starting with \'B\' \'M\'... Not a BMP file?"); + return -1; + } + p += 2; + +#define ULONG_LE(b) ((b)[0] + ((b)[1] << 8) +\ + ((b)[2] << 16) + ((b)[3] << 24)) +#define USHORT_LE(b) ((b)[0] + ((b)[1] << 8)) + + fsize = ULONG_LE(p); p += 4; + if (ULONG_LE(p) != 0) { + WARN("Not a BMP file???"); + return -1; + } + p += 4; + offset = ULONG_LE(p); p += 4; + + /* info header */ + hsize = ULONG_LE(p); p += 4; + if (fread(p, sizeof(char), hsize - 4, fp) != hsize - 4) { + WARN("Could not read BMP file header..."); + return -1; + } + flip = 1; + if (hsize == DIB_CORE_HEADER_SIZE) { + info.width = USHORT_LE(p); p += 2; + info.height = USHORT_LE(p); p += 2; + if (USHORT_LE(p) != 1) { + WARN("Unknown bcPlanes value in BMP COREHEADER."); + return -1; + } + p += 2; + bit_count = USHORT_LE(p); p += 2; + compression = DIB_COMPRESS_NONE; + psize = 3; + } else if (hsize == DIB_INFO_HEADER_SIZE) { + info.width = ULONG_LE(p); p += 4; + info.height = ULONG_LE(p); p += 4; + if (USHORT_LE(p) != 1) { + WARN("Unknown biPlanes value in BMP INFOHEADER."); + return -1; + } + p += 2; + bit_count = USHORT_LE(p); p += 2; + compression = ULONG_LE(p); p += 4; + /* ignore biSizeImage */ p += 4; + biXPelsPerMeter = ULONG_LE(p); p += 4; + biYPelsPerMeter = ULONG_LE(p); p += 4; + info.xdpi = biXPelsPerMeter * 0.0254; /* convert pixels per meter to DPI */ + info.ydpi = biYPelsPerMeter * 0.0254; + if (info.height < 0) { + info.height = -info.height; + flip = 0; + } + psize = 4; + } else { + WARN("Unknown BMP header type."); + return -1; + } + + if (bit_count < 24) { + if (bit_count != 1 && + bit_count != 4 && bit_count != 8) { + WARN("Unsupported palette size: %ld", bit_count); + return -1; + } + num_palette = (offset - hsize - DIB_FILE_HEADER_SIZE) / psize; + info.bits_per_component = bit_count; + info.num_components = 1; + } else if (bit_count == 24) { /* full color */ + num_palette = 1; /* dummy */ + info.bits_per_component = 8; + info.num_components = 3; + } else { + WARN("Unkown BMP bitCount: %ld", bit_count); + return -1; + } + + if (info.width == 0 || info.height == 0 || num_palette < 1) { + WARN("Invalid BMP file: width=%ld, height=%ld, #palette=%d", + info.width, info.height, num_palette); + return -1; + } + + stream = pdf_new_stream(STREAM_COMPRESS); + stream_dict = pdf_stream_dict(stream); + + if (bit_count < 24) { + pdf_obj *lookup; + unsigned char *palette, bgrq[4]; + + palette = NEW(num_palette*3+1, unsigned char); + for (i = 0; i < num_palette; i++) { + if (fread(bgrq, 1, psize, fp) != psize) { + WARN("Reading file failed..."); + RELEASE(palette); + return -1; + } + /* BGR data */ + palette[3*i ] = bgrq[2]; + palette[3*i+1] = bgrq[1]; + palette[3*i+2] = bgrq[0]; + } + lookup = pdf_new_string(palette, num_palette*3); + RELEASE(palette); + + colorspace = pdf_new_array(); + pdf_add_array(colorspace, pdf_new_name("Indexed")); + pdf_add_array(colorspace, pdf_new_name("DeviceRGB")); + pdf_add_array(colorspace, pdf_new_number(num_palette-1)); + pdf_add_array(colorspace, lookup); + } else { + colorspace = pdf_new_name("DeviceRGB"); + } + pdf_add_dict(stream_dict, pdf_new_name("ColorSpace"), colorspace); + + /* Raster data of BMP is four-byte aligned. */ + { + long rowbytes, n; + unsigned char *stream_data_ptr = NULL; + + rowbytes = (info.width * bit_count + 7) / 8; + + seek_absolute(fp, offset); + if (compression == DIB_COMPRESS_NONE) { + long dib_rowbytes; + int padding; + + padding = (rowbytes % 4) ? 4 - (rowbytes % 4) : 0; + dib_rowbytes = rowbytes + padding; + stream_data_ptr = NEW(rowbytes*info.height + padding, + unsigned char); + for (n = 0; n < info.height; n++) { + p = stream_data_ptr + n * rowbytes; + if (fread(p, 1, dib_rowbytes, fp) != dib_rowbytes) { + WARN("Reading BMP raster data failed..."); + pdf_release_obj(stream); + RELEASE(stream_data_ptr); + return -1; + } + } + } else if (compression == DIB_COMPRESS_RLE8) { + stream_data_ptr = NEW(rowbytes*info.height, unsigned char); + if (read_raster_rle8(stream_data_ptr, + info.width, info.height, fp) < 0) { + WARN("Reading BMP raster data failed..."); + pdf_release_obj(stream); + RELEASE(stream_data_ptr); + return -1; + } + } else if (compression == DIB_COMPRESS_RLE4) { + stream_data_ptr = NEW(rowbytes*info.height, unsigned char); + if (read_raster_rle4(stream_data_ptr, + info.width, info.height, fp) < 0) { + WARN("Reading BMP raster data failed..."); + pdf_release_obj(stream); + RELEASE(stream_data_ptr); + return -1; + } + } else { + pdf_release_obj(stream); + return -1; + } + + /* gbr --> rgb */ + if (bit_count == 24) { + for (n = 0; n < info.width * info.height * 3; n += 3) { + unsigned char g; + g = stream_data_ptr[n]; + stream_data_ptr[n ] = stream_data_ptr[n+2]; + stream_data_ptr[n+2] = g; + } + } + + if (flip) { + for (n = info.height - 1; n >= 0; n--) { + p = stream_data_ptr + n * rowbytes; + pdf_add_stream(stream, p, rowbytes); + } + } else { + pdf_add_stream(stream, stream_data_ptr, rowbytes*info.height); + } + RELEASE(stream_data_ptr); + } + + pdf_ximage_set_image(ximage, &info, stream); + + return 0; +} + +static long +read_raster_rle8 (unsigned char *data_ptr, + long width, long height, FILE *fp) +{ + long count = 0; + unsigned char *p, b0, b1; + long h, v, rowbytes; + int eol, eoi; + + p = data_ptr; + rowbytes = width; + memset(data_ptr, 0, rowbytes*height); + for (v = 0, eoi = 0; v < height && !eoi; v++) { + for (h = 0, eol = 0; h < width && !eol; ) { + + b0 = get_unsigned_byte(fp); + b1 = get_unsigned_byte(fp); + count += 2; + + p = data_ptr + v * rowbytes + h; + + if (b0 == 0x00) { + switch (b1) { + case 0x00: /* EOL */ + eol = 1; + break; + case 0x01: /* EOI */ + eoi = 1; + break; + case 0x02: + h += get_unsigned_byte(fp); + v += get_unsigned_byte(fp); + count += 2; + break; + default: + h += b1; + if (h > width) { + WARN("RLE decode failed..."); + return -1; + } + if (fread(p, 1, b1, fp) != b1) + return -1; + count += b1; + if (b1 % 2) { + get_unsigned_byte(fp); + count++; + } + break; + } + } else { + h += b0; + if (h > width) { + WARN("RLE decode failed..."); + return -1; + } + memset(p, b1, b0); + } + } + + /* Check for EOL and EOI marker */ + if (!eol && !eoi) { + b0 = get_unsigned_byte(fp); + b1 = get_unsigned_byte(fp); + if (b0 != 0x00) { + WARN("RLE decode failed..."); + return -1; + } else if (b1 == 0x01) { + eoi = 1; + } else if (b1 != 0x00) { + WARN("RLE decode failed..."); + return -1; + } + } + + /* next row ... */ + } + + return count; +} + +static long +read_raster_rle4 (unsigned char *data_ptr, + long width, long height, FILE *fp) +{ + long count = 0; + unsigned char *p, b0, b1, b; + long h, v, rowbytes; + int eol, eoi, i, nbytes; + + p = data_ptr; + rowbytes = (width + 1) / 2; + memset(data_ptr, 0, rowbytes*height); + for (v = 0, eoi = 0; v < height && !eoi; v++) { + for (h = 0, eol = 0; h < width && !eol; ) { + + b0 = get_unsigned_byte(fp); + b1 = get_unsigned_byte(fp); + count += 2; + + p = data_ptr + v * rowbytes + (h / 2); + if (b0 == 0x00) { + switch (b1) { + case 0x00: /* EOL */ + eol = 1; + break; + case 0x01: /* EOI */ + eoi = 1; + break; + case 0x02: + h += get_unsigned_byte(fp); + v += get_unsigned_byte(fp); + count += 2; + break; + default: + if (h + b1 > width) { + WARN("RLE decode failed..."); + return -1; + } + nbytes = (b1 + 1)/2; + if (h % 2) { /* starting at hi-nib */ + for (i = 0; i < nbytes; i++) { + b = get_unsigned_byte(fp); + *p++ |= (b >> 4) & 0x0f; + *p = (b << 4) & 0xf0; + } + } else { + if (fread(p, 1, nbytes, fp) != nbytes) { + return -1; + } + } + h += b1; + count += nbytes; + if (nbytes % 2) { + get_unsigned_byte(fp); + count++; + } + break; + } + } else { + if (h + b0 > width) { + WARN("RLE decode failed..."); + return -1; + } + if (h % 2) { + *p++ = (b1 >> 4) & 0x0f; + b1 = ((b1 << 4) & 0xf0)|((b1 >> 4) & 0x0f); + b0--; + h++; + } + nbytes = (b0 + 1)/2; + memset(p, b1, nbytes); + h += b0; + if (h % 2) + p[nbytes-1] &= 0xf0; + } + } + + /* Check for EOL and EOI marker */ + if (!eol && !eoi) { + b0 = get_unsigned_byte(fp); + b1 = get_unsigned_byte(fp); + if (b0 != 0x00) { + WARN("No EOL/EOI marker. RLE decode failed..."); + return -1; + } else if (b1 == 0x01) { + eoi = 1; + } else if (b1 != 0x00) { + WARN("No EOL/EOI marker. RLE decode failed..."); + return -1; + } + } + + /* next row ... */ + } + + return count; +} |