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Diffstat (limited to 'pdf/Thumb.cc')
| -rw-r--r-- | pdf/Thumb.cc | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/pdf/Thumb.cc b/pdf/Thumb.cc new file mode 100644 index 0000000..02b4d23 --- /dev/null +++ b/pdf/Thumb.cc @@ -0,0 +1,190 @@ +/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-indent-level: 8; c-basic-offset: 8 -*- */ +/* + * Copyright (C) 2003 Remi Cohen-Scali + * + * Author: + * Remi Cohen-Scali <Remi@Cohen-Scali.com> + * + * GPdf 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. + * + * GPdf 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. + */ + +#include <string.h> + +#ifdef USE_GCC_PRAGMAS +#pragma implementation +#endif + +#include <glib.h> +#include <goo/gmem.h> +#include <Object.h> +#include <Gfx.h> +#include <GfxState.h> +#include "Thumb.h" + +/* + * Thumb + */ + +Thumb::Thumb(XRef *xrefA, Object *obj) : + xref(xrefA), + str(NULL), + ok_flag(0) +{ + Object obj1, obj2; + Dict *dict; + GfxColorSpace *colorSpace; + + do { + /* Get stream dict */ + dict = obj->streamGetDict (); + str = obj->getStream(); + + /* Get width */ + dict->lookup ("Width", &obj1); + if (obj1.isNull ()) + { + obj1.free (); + dict->lookup ("W", &obj1); + } + if (!obj1.isInt ()) { + fprintf (stderr, "Error: Invalid Width object %s\n", + obj1.getTypeName ()); + obj1.free (); + break; + } + width = obj1.getInt (); + obj1.free (); + + /* Get heigth */ + dict->lookup ("Height", &obj1); + if (obj1.isNull ()) + { + obj1.free (); + dict->lookup ("H", &obj1); + } + if (!obj1.isInt ()) { + fprintf (stderr, "Error: Invalid Height object %s\n", + obj1.getTypeName ()); + obj1.free (); + break; + } + height = obj1.getInt (); + obj1.free (); + + /* bit depth */ + dict->lookup ("BitsPerComponent", &obj1); + if (obj1.isNull ()) + { + obj1.free (); + dict->lookup ("BPC", &obj1); + } + if (!obj1.isInt ()) { + fprintf (stderr, "Error: Invalid BitsPerComponent object %s\n", + obj1.getTypeName ()); + obj1.free (); + break; + } + bits = obj1.getInt (); + obj1.free (); + + /* Get color space */ + dict->lookup ("ColorSpace", &obj1); + if (obj1.isNull ()) + { + obj1.free (); + dict->lookup ("CS", &obj1); + } + colorSpace = GfxColorSpace::parse(&obj1); + obj1.free(); + if (!colorSpace) { + fprintf (stderr, "Error: Cannot parse color space\n"); + break; + } + + dict->lookup("Decode", &obj1); + if (obj1.isNull()) { + obj1.free(); + dict->lookup("D", &obj1); + } + colorMap = new GfxImageColorMap(bits, &obj1, colorSpace); + obj1.free(); + if (!colorMap->isOk()) { + fprintf (stderr, "Error: invalid colormap\n"); + delete colorMap; + colorMap = NULL; + } + + dict->lookup ("Length", &obj1); + if (!obj1.isInt ()) { + fprintf (stderr, "Error: Invalid Length Object %s\n", + obj1.getTypeName ()); + obj1.free (); + break; + } + length = obj1.getInt (); + obj1.free (); + + str->addFilters(obj); + + ok_flag = 1; + } + while (0); +} + +unsigned char * +Thumb::getPixbufData() +{ + ImageStream *imgstr; + unsigned char *pixbufdata; + unsigned int pixbufdatasize; + int row, col; + unsigned char *p; + + /* RGB Pixbuf data */ + pixbufdatasize = width * height * 3; + if (colorMap) { + pixbufdata =(unsigned char *)g_malloc(pixbufdatasize); + } else { + pixbufdata =(unsigned char *)g_malloc0(pixbufdatasize); + return pixbufdata; + } + + p = pixbufdata; + + imgstr = new ImageStream(str, width, colorMap->getNumPixelComps(), colorMap->getBits()); + imgstr->reset(); + for (row = 0; row < height; ++row) { + for (col = 0; col < width; ++col) { + Guchar pix[gfxColorMaxComps]; + GfxRGB rgb; + + imgstr->getPixel(pix); + colorMap->getRGB(pix, &rgb); + + *p++ = (guchar)(rgb.r * 255.99999); + *p++ = (guchar)(rgb.g * 255.99999); + *p++ = (guchar)(rgb.b * 255.99999); + } + } + delete imgstr; + + return pixbufdata; +} + +Thumb::~Thumb() { + delete colorMap; + delete str; +} + |