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Diffstat (limited to 'externals/gridflow/format/png.c')
| -rw-r--r-- | externals/gridflow/format/png.c | 138 |
1 files changed, 0 insertions, 138 deletions
diff --git a/externals/gridflow/format/png.c b/externals/gridflow/format/png.c deleted file mode 100644 index 5db0c254..00000000 --- a/externals/gridflow/format/png.c +++ /dev/null @@ -1,138 +0,0 @@ -/* - $Id: png.c,v 1.2 2006-03-15 04:37:46 matju Exp $ - - GridFlow - Copyright (c) 2001,2002,2003,2004 by Mathieu Bouchard - - 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. - - See file ../COPYING for further informations on licensing terms. - - 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. -*/ - -/* !@#$ not handling abort on compress */ -/* !@#$ not handling abort on decompress */ - -#include "../base/grid.h.fcs" -extern "C" { -#include <libpng12/png.h> -}; - -\class FormatPNG < Format -struct FormatPNG : Format { - P<BitPacking> bit_packing; - png_structp png; - png_infop info; - int fd; - FILE *f; - FormatPNG () : bit_packing(0), png(0), f(0) {} - \decl Ruby frame (); - \decl void initialize (Symbol mode, Symbol source, String filename); - \grin 0 int -}; - -GRID_INLET(FormatPNG,0) { - if (in->dim->n != 3) - RAISE("expecting 3 dimensions: rows,columns,channels"); - if (in->dim->get(2) != 3) - RAISE("expecting 3 channels (got %d)",in->dim->get(2)); - in->set_factor(in->dim->get(1)*in->dim->get(2)); - RAISE("bother, said pooh, as the PNG encoding was found unimplemented"); -} GRID_FLOW { - int rowsize = in->dim->get(1)*in->dim->get(2); - int rowsize2 = in->dim->get(1)*3; - uint8 row[rowsize2]; - while (n) { - bit_packing->pack(in->dim->get(1),data,Pt<uint8>(row,rowsize)); - n-=rowsize; data+=rowsize; - } -} GRID_FINISH { -} GRID_END - -\def Ruby frame () { - uint8 sig[8]; - if (!fread(sig, 1, 8, f)) return Qfalse; - if (!png_check_sig(sig, 8)) RAISE("bad signature"); - png = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); - if (!png) RAISE("!png"); - info = png_create_info_struct(png); - if (!info) { - png_destroy_read_struct(&png, NULL, NULL); RAISE("!info"); - } - if (setjmp(png_jmpbuf(png))) { - png_destroy_read_struct(&png, &info, NULL); RAISE("png read error"); - } - png_init_io(png, f); - png_set_sig_bytes(png, 8); // we already read the 8 signature bytes - png_read_info(png, info); // read all PNG info up to image data - png_uint_32 width, height; - int bit_depth, color_type; - png_get_IHDR(png, info, &width, &height, &bit_depth, &color_type, 0,0,0); - - png_bytepp row_pointers = 0; - if (color_type == PNG_COLOR_TYPE_PALETTE - || (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) - || png_get_valid(png, info, PNG_INFO_tRNS)) - png_set_expand(png); - // 16bpp y, 32bpp ya, 48bpp rgb, 64bpp rgba... - if (bit_depth == 16) png_set_strip_16(png); - - double display_gamma = 2.2; - double gamma; - if (png_get_gAMA(png, info, &gamma)) - png_set_gamma(png, display_gamma, gamma); - png_read_update_info(png, info); - - int rowbytes = png_get_rowbytes(png, info); - int channels = (int)png_get_channels(png, info); - Pt<uint8> image_data = ARRAY_NEW(uint8,rowbytes*height); - row_pointers = new png_bytep[height]; - //gfpost("png: color_type=%d channels=%d, width=%d, rowbytes=%ld, height=%ld, gamma=%f", - // color_type, channels, width, rowbytes, height, gamma); - for (int i=0; i<(int)height; i++) row_pointers[i] = image_data + i*rowbytes; - if ((uint32)rowbytes != width*channels) - RAISE("rowbytes mismatch: %d is not %d*%d=%d", - rowbytes, width, channels, width*channels); - png_read_image(png, row_pointers); - delete row_pointers; - row_pointers = 0; - png_read_end(png, 0); - - GridOutlet out(this,0,new Dim(height, width, channels), - NumberTypeE_find(rb_ivar_get(rself,SI(@cast)))); - out.send(rowbytes*height,image_data); - free(image_data); - png_destroy_read_struct(&png, &info, NULL); - return Qnil; -} - -\def void initialize (Symbol mode, Symbol source, String filename) { - rb_call_super(argc,argv); - if (source!=SYM(file)) RAISE("usage: png file <filename>"); - rb_funcall(rself,SI(raw_open),3,mode,source,filename); - Ruby stream = rb_ivar_get(rself,SI(@stream)); - fd = NUM2INT(rb_funcall(stream,SI(fileno),0)); - f = fdopen(fd,mode==SYM(in)?"r":"w"); - uint32 mask[3] = {0x0000ff,0x00ff00,0xff0000}; - bit_packing = new BitPacking(is_le(),3,3,mask); -} - -\classinfo { - IEVAL(rself, - "install '#io:png',1,1;@mode=4;include GridFlow::EventIO; suffixes_are'png'"); -} -\end class FormatPNG -void startup_png () { - \startall -} |