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413 lines
8.1 KiB
413 lines
8.1 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 <iostream>
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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 <sys/types.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_tga_defs.h"
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#include "fmt_codec_tga.h"
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#include "../xpm/codec_tga.xpm"
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/*
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*
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* The TGA (Truevision Graphics Adapter) format
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* is used widely in paint, graphics, and imaging applications that
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* require the storage of image data containing up to 32 bits per
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* pixel. TGA is associated with the Truevision
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* product line of Targa, Vista, NuVista, and Targa 2000 graphics
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* adapters for the PC and Macintosh, all of which can capture
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* NTSC and/or PAL video image signals and store them in a digital frame buffer.
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* For this reason, TGA has also become popular in the world of
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* still-video editing.
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*
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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 = "0.7.2";
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o->name = "TarGA";
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o->filter = "*.tga ";
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o->config = "";
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o->mime = "";
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o->mimetype = "image/x-targa";
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o->pixmap = codec_tga;
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o->readable = true;
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o->canbemultiple = false;
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o->writestatic = false;
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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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frs.open(file.c_str(), ios::binary | ios::in);
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if(!frs.good())
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return SQE_R_NOFILE;
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currentImage = -1;
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pal_entr = 0;
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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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if(!frs.readK(&tfh, sizeof(TGA_FILEHEADER))) return SQE_R_BADFILE;
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image.w = tfh.ImageSpecW;
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image.h = tfh.ImageSpecH;
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image.bpp = tfh.ImageSpecDepth;
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pal_entr = 0;
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if(tfh.IDlength)
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{
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s8 data[tfh.IDlength];
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if(!frs.readK(data, tfh.IDlength)) return SQE_R_BADFILE;
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fmt_metaentry mt;
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mt.group = "TGA image identification field";
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mt.data = data;
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addmeta(mt);
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}
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if(tfh.ColorMapType)
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{
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pal_entr = tfh.ColorMapSpecLength;
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// if((pal = (RGB*)calloc(pal_entr, sizeof(RGB))) == 0)
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// return SQE_R_NOMEMORY;
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// s8 sz = tfh.ColorMapSpecEntrySize;
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s32 i;
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// u16 word;
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for(i = 0;i < pal_entr;i++)
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{
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/*if(sz==24)*/ if(!frs.readK(pal+i, sizeof(RGB))) return SQE_R_BADFILE;
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/* alpha ingored *//*else if(sz==32) { fread(finfo.pal+i, sizeof(RGB), 1, fptr); fgetc(fptr); }
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else if(sz==16)
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{
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fread(&word, 2, 1, fptr);
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(finfo.pal)[i].b = (word&0x1f) << 3;
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(finfo.pal)[i].g = ((word&0x3e0) >> 5) << 3;
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(finfo.pal)[i].r = ((word&0x7c00)>>10) << 3;
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}*/
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}
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}
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// else
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// pal = 0;
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if(tfh.ImageType == 0)
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return SQE_R_BADFILE;
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std::string comp, type;
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fliph = (bool)(tfh.ImageSpecDescriptor & 0x10);
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image.needflip = !(bool)(tfh.ImageSpecDescriptor & 0x20);
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image.hasalpha = (image.bpp == 32);
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switch(tfh.ImageType)
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{
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case 1:
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comp = "-";
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type = "Color indexed";
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break;
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case 2:
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comp = "-";
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type = (( image.bpp == 32) ? "RGBA":"RGB");
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break;
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case 3:
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comp = "-";
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type = "Monochrome";
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break;
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case 9:
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comp = "RLE";
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type = "Color indexed";
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break;
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case 10:
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comp = "RLE";
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type = (( image.bpp == 32) ? "RGBA":"RGB");
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break;
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case 11:
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comp = "RLE";
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type = "Monochrome";
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break;
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}
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image.compression = comp;
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image.colorspace = type;
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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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s32 j, counter = 0;
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RGB rgb;
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RGBA rgba;
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fmt_image *im = image(currentImage);
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fmt_utils::fillAlpha(scan, im->w);
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switch(tfh.ImageType)
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{
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case 0:
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break;
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case 1:
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{
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}
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break;
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case 2:
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{
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if(tfh.ImageSpecDepth==24)
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{
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for(j = 0;j < im->w;j++)
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{
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if(!frs.readK(&rgb, sizeof(RGB))) return SQE_R_BADFILE;
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(scan+counter)->r = rgb.b;
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(scan+counter)->g = rgb.g;
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(scan+counter)->b = rgb.r;
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counter++;
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}
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}
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else if(tfh.ImageSpecDepth==32)
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{
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for(j = 0;j < im->w;j++)
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{
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if(!frs.readK(&rgba, sizeof(RGBA))) return SQE_R_BADFILE;
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(scan+counter)->r = rgba.b;
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(scan+counter)->g = rgba.g;
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(scan+counter)->b = rgba.r;
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counter++;
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}
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}
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else if(tfh.ImageSpecDepth==16)
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{
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u16 word;
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for(j = 0;j < im->w;j++)
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{
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if(!frs.readK(&word, 2)) return SQE_R_BADFILE;
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scan[counter].b = (word&0x1f) << 3;
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scan[counter].g = ((word&0x3e0) >> 5) << 3;
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scan[counter++].r = ((word&0x7c00)>>10) << 3;
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}
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}
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}
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break;
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case 3:
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break;
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// RLE + color mapped
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case 9:
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break;
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// RLE + true color
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case 10:
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{
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u8 bt, count;
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ushort counter = 0, word;
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RGBA rgba;
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for(;;)
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{
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if(!frs.readK(&bt, 1)) return SQE_R_BADFILE;
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count = (bt&127) + 1;
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// RLE packet
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if(bt >= 128)
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{
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switch(im->bpp)
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{
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case 16:
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if(!frs.readK(&word, 2)) return SQE_R_BADFILE;
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rgb.b = (word&0x1f) << 3;
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rgb.g = ((word&0x3e0) >> 5) << 3;
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rgb.r = ((word&0x7c00)>>10) << 3;
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for(j = 0;j < count;j++)
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{
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memcpy(scan+(counter++), &rgb, sizeof(RGB));
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if(counter >= im->w-1) goto lts;
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}
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break;
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case 24:
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if(!frs.readK(&rgb, sizeof(RGB))) return SQE_R_BADFILE;
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for(j = 0;j < count;j++)
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{
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(scan+counter)->r = rgb.b;
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(scan+counter)->g = rgb.g;
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(scan+counter)->b = rgb.r;
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counter++;
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if(counter >= im->w-1) goto lts;
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}
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break;
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case 32:
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if(!frs.readK(&rgba, sizeof(RGBA))) return SQE_R_BADFILE;
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for(j = 0;j < count;j++)
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{
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(scan+counter)->r = rgba.b;
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(scan+counter)->g = rgba.g;
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(scan+counter)->b = rgba.r;
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counter++;
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if(counter >= im->w-1) goto lts;
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}
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break;
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}
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}
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else // Raw packet
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{
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switch(im->bpp)
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{
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case 16:
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for(j = 0;j < count;j++)
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{
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if(!frs.readK(&word, 2)) return SQE_R_BADFILE;
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rgb.b = (word&0x1f) << 3;
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rgb.g = ((word&0x3e0) >> 5) << 3;
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rgb.r = ((word&0x7c00)>>10) << 3;
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memcpy(scan+(counter++), &rgb, sizeof(RGB));
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if(counter >= im->w-1) goto lts;
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}
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break;
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case 24:
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for(j = 0;j < count;j++)
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{
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if(!frs.readK(&rgb, sizeof(RGB))) return SQE_R_BADFILE;
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(scan+counter)->r = rgb.b;
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(scan+counter)->g = rgb.g;
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(scan+counter)->b = rgb.r;
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counter++;
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if(counter >= im->w-1) goto lts;
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}
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break;
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case 32:
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for(j = 0;j < count;j++)
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{
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if(!frs.readK(&rgba, sizeof(RGBA))) return SQE_R_BADFILE;
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(scan+counter)->r = rgba.b;
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(scan+counter)->g = rgba.g;
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(scan+counter)->b = rgba.r;
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counter++;
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if(counter >= im->w-1) goto lts;
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}
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break;
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}
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}
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}
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}
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lts:
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break;
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// RLE + B&W
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case 11:
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break;
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}
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if(fliph)
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{
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RGBA t;
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s32 ww = im->w;
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for(j = 0;j < ww / 2;j++)
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{
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t = *(scan+j);
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*(scan+j) = *(scan+ww-j-1);
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*(scan+ww-j-1) = t;
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}
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}
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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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frs.close();
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finfo.meta.clear();
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finfo.image.clear();
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}
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#include "fmt_codec_cd_func.h"
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