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310 lines
6.8 KiB
310 lines
6.8 KiB
/* This file is part of ksquirrel-libs (http://ksquirrel.sf.net)
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Copyright (c) 2004 Dmitry Baryshev <ksquirrel@tut.by>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation;
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either version 2 of the License, or (at your option) any later
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version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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as32 with this library; see the file COPYING. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include <csetjmp>
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#include <iostream>
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#include <cstdio>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "ksquirrel-libs/fmt_types.h"
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#include "ksquirrel-libs/fileio.h"
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#include "ksquirrel-libs/error.h"
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#include "ksquirrel-libs/fmt_utils.h"
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#include "fmt_codec_jpeg_defs.h"
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#include "fmt_codec_jpeg.h"
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#include "../xpm/codec_jpeg.xpm"
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/*
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*
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* JPEG (Joint Photographic Experts Group) refers to a
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* standards organization, a method of file compression, and sometimes a
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* file format. In fact, the JPEG specification
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* itself does not define a common file interchange
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* format to store and transport JPEG data between
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* computer platforms and operating systems. The JPEG
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* File Interchange Format (JFIF) is a development of
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* C-Cube Microsystems for the purpose of storing
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* JPEG-encoded data. JFIF is
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* designed to allow files containing JPEG-encoded
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* data streams to be exchanged between otherwise incompatible systems
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* and applications.
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*
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*/
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METHODDEF(void) my_error_exit(j_common_ptr cinfo)
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{
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my_error_ptr myerr;
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myerr = (my_error_ptr) cinfo->err;
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(*cinfo->err->output_message) (cinfo);
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longjmp(myerr->setjmp_buffer, 1);
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}
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fmt_codec::fmt_codec() : fmt_codec_base()
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{}
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fmt_codec::~fmt_codec()
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{}
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void fmt_codec::options(codec_options *o)
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{
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o->version = "1.3.4.1";
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o->name = "JPEG compressed";
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o->filter = "*.jpg *.jpeg *.jpe ";
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o->config = "";
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o->mime = "\x00FF\x00D8\x00FF";
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o->mimetype = "image/jpeg";
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o->pixmap = codec_jpeg;
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o->readable = true;
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o->canbemultiple = false;
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o->writestatic = true;
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o->writeanimated = false;
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o->needtempfile = false;
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}
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s32 fmt_codec::read_init(const std::string &file)
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{
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zerror = false;
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fptr = fopen(file.c_str(), "rb");
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if(!fptr)
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return SQE_R_NOFILE;
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currentImage = -1;
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finfo.animated = false;
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return SQE_OK;
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}
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s32 fmt_codec::read_next()
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{
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currentImage++;
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if(currentImage)
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return SQE_NOTOK;
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fmt_image image;
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cinfo.err = jpeg_std_error(&jerr.pub);
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jerr.pub.error_exit = my_error_exit;
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if(setjmp(jerr.setjmp_buffer))
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{
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zerror = true;
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return SQE_R_BADFILE;
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}
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jpeg_create_decompress(&cinfo);
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jpeg_stdio_src(&cinfo, fptr);
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jpeg_save_markers(&cinfo, JPEG_COM, 0xffff);
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jpeg_read_header(&cinfo, TRUE);
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if(cinfo.jpeg_color_space == JCS_GRAYSCALE)
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{
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cinfo.out_color_space = JCS_RGB;
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cinfo.desired_number_of_colors = 256;
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cinfo.quantize_colors = FALSE;
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cinfo.two_pass_quantize = FALSE;
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}
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jpeg_start_decompress(&cinfo);
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image.w = cinfo.output_width;
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image.h = cinfo.output_height;
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buffer = (*cinfo.mem->alloc_sarray)((j_common_ptr)&cinfo, JPOOL_IMAGE, cinfo.output_width * cinfo.output_components, 1);
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std::string type;
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switch(cinfo.jpeg_color_space)
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{
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case JCS_GRAYSCALE: type = "Grayscale"; image.bpp = 8; break;
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case JCS_RGB: type = "RGB"; image.bpp = 24; break;
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case JCS_YCbCr: type = "YUV"; image.bpp = 24; break;
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case JCS_CMYK: type = "CMYK"; image.bpp = 32; break;
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case JCS_YCCK: type = "YCCK"; image.bpp = 32; break;
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default:
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type = "Unknown";
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}
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image.compression = "JPEG";
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image.colorspace = type;
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jpeg_saved_marker_ptr it = cinfo.marker_list;
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while(it)
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{
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if(it->marker == JPEG_COM)
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{
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fmt_metaentry mt;
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mt.group = "Comment";
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s8 data[it->data_length+1];
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memcpy(data, it->data, it->data_length);
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data[it->data_length] = '\0';
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mt.data = data;
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addmeta(mt);
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break;
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}
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it = it->next;
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}
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finfo.image.push_back(image);
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return SQE_OK;
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}
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s32 fmt_codec::read_next_pass()
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{
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return SQE_OK;
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}
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s32 fmt_codec::read_scanline(RGBA *scan)
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{
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fmt_image *im = image(currentImage);
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fmt_utils::fillAlpha(scan, im->w);
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if(zerror || setjmp(jerr.setjmp_buffer))
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{
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zerror = true;
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return SQE_R_BADFILE;
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}
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(void)jpeg_read_scanlines(&cinfo, buffer, 1);
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for(s32 i = 0;i < im->w;i++)
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memcpy(scan+i, buffer[0] + i*3, 3);
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return SQE_OK;
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}
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void fmt_codec::read_close()
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{
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jpeg_abort_decompress(&cinfo);
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jpeg_destroy_decompress(&cinfo);
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if(fptr)
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fclose(fptr);
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finfo.meta.clear();
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finfo.image.clear();
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}
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void fmt_codec::getwriteoptions(fmt_writeoptionsabs *opt)
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{
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opt->interlaced = false;
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opt->compression_scheme = CompressionInternal;
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opt->compression_min = 0;
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opt->compression_max = 100;
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opt->compression_def = 25;
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opt->passes = 1;
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opt->needflip = false;
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opt->palette_flags = 0 | fmt_image::pure32;
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}
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s32 fmt_codec::write_init(const std::string &file, const fmt_image &image, const fmt_writeoptions &opt)
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{
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if(!image.w || !image.h || file.empty())
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return SQE_W_WRONGPARAMS;
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writeimage = image;
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writeopt = opt;
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m_fptr = fopen(file.c_str(), "wb");
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if(!m_fptr)
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return SQE_W_NOFILE;
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m_cinfo.err = jpeg_std_error(&m_jerr);
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jpeg_create_compress(&m_cinfo);
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jpeg_stdio_dest(&m_cinfo, m_fptr);
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m_cinfo.image_width = image.w;
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m_cinfo.image_height = image.h;
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m_cinfo.input_components = 3;
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m_cinfo.in_color_space = JCS_RGB;
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jpeg_set_defaults(&m_cinfo);
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jpeg_set_quality(&m_cinfo, 100-opt.compression_level, true);
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jpeg_start_compress(&m_cinfo, true);
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return SQE_OK;
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}
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s32 fmt_codec::write_next()
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{
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return SQE_OK;
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}
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s32 fmt_codec::write_next_pass()
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{
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return SQE_OK;
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}
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s32 fmt_codec::write_scanline(RGBA *scan)
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{
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RGB *sr = new RGB[writeimage.w];
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for(s32 s = 0;s < writeimage.w;s++)
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{
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memcpy(sr+s, scan+s, sizeof(RGB));
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}
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row_pointer = (JSAMPLE *)sr;
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(void)jpeg_write_scanlines(&m_cinfo, &row_pointer, 1);
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delete [] sr;
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return SQE_OK;
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}
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void fmt_codec::write_close()
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{
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jpeg_finish_compress(&m_cinfo);
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fclose(m_fptr);
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jpeg_destroy_compress(&m_cinfo);
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}
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std::string fmt_codec::extension(const s32 /*bpp*/)
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{
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return std::string("jpeg");
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}
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#include "fmt_codec_cd_func.h"
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