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frodo |
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/* |
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generate_image.c - Part of psiconv, a PSION 5 file formats converter |
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Copyright (c) 1999, 2000 Frodo Looijaard <frodol@dds.nl> |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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This program 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 |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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#include "config.h" |
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#include "compat.h" |
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#include "generate_routines.h" |
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#include "error.h" |
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frodo |
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#ifdef DMALLOC |
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#include <dmalloc.h> |
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#endif |
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frodo |
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typedef psiconv_list psiconv_pixel_bytes; /* psiconv_u8 */ |
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frodo |
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|
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frodo |
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typedef psiconv_list psiconv_pixel_ints; /* of psiconv_u32 */ |
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typedef struct psiconv_pixel_float_s |
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{ |
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float *red; |
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float *green; |
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float *blue; |
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} psiconv_pixel_floats_t; |
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static int psiconv_collect_pixel_data(const psiconv_config config, |
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psiconv_pixel_ints *pixels,int xsize, |
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int ysize, |
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const psiconv_pixel_floats_t data, |
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int colordepth, int palet_len, |
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const psiconv_pixel_floats_t palet); |
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static int psiconv_pixel_data_to_bytes(const psiconv_config config, psiconv_pixel_bytes *bytes, int xsize, |
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int ysize, const psiconv_pixel_ints pixels, |
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int colordepth); |
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float palet_grey_2_rgb[4] = {0.0/3, 1.0/3, 2.0/3, 3.0/3}; |
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float palet_grey_4_rgb[16] = { 0.0/15, 1.0/15, 2.0/15, 3.0/15, |
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4.0/15, 5.0/15, 6.0/15, 7.0/15, |
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8.0/15, 9.0/15, 10.0/15, 11.0/15, |
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12.0/15, 13.0/15, 14.0/15, 15.0/15}; |
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psiconv_pixel_floats_t palet_grey_2 = |
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{ |
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(float *) palet_grey_2_rgb, |
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(float *) palet_grey_2_rgb, |
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(float *) palet_grey_2_rgb |
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}; |
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psiconv_pixel_floats_t palet_grey_4 = |
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{ |
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(float *) palet_grey_4_rgb, |
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(float *) palet_grey_4_rgb, |
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(float *) palet_grey_4_rgb |
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}; |
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/* For now, we only write 2-bit non-RLE-encoded stuff */ |
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int psiconv_write_paint_data_section(const psiconv_config config, |
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psiconv_buffer buf, |
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const psiconv_paint_data_section value) |
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{ |
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int res; |
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psiconv_buffer pix_buf; |
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if (!value) { |
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psiconv_warn(config,0,psiconv_buffer_length(buf),"Null paint data section"); |
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res = -PSICONV_E_GENERATE; |
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goto ERROR1; |
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} |
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if (!(pix_buf = psiconv_buffer_new())) { |
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res = -PSICONV_E_NOMEM; |
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goto ERROR1; |
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} |
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return 0; |
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ERROR2: |
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psiconv_buffer_free(pix_buf); |
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ERROR1: |
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return res; |
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} |
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/* Translate the floating point RGB information into pixel values. |
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The palet is optional; without it, we just use the |
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colordepth. With a large palet this is not very fast, but it will do for |
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now. For greyscale pictures, just use the palet. */ |
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int psiconv_collect_pixel_data(const psiconv_config config, |
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psiconv_pixel_ints *pixels,int xsize,int ysize, |
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const psiconv_pixel_floats_t data, |
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int colordepth, int palet_len, |
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const psiconv_pixel_floats_t palet) |
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{ |
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int res,x,y,i; |
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psiconv_u32 index,mask,pixel; |
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float p_red,p_green,p_blue,mult,dist,new_dist; |
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if (!(*pixels = psiconv_list_new(sizeof(psiconv_u32)))) { |
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res = -PSICONV_E_NOMEM; |
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goto ERROR1; |
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} |
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mult = 1 << colordepth; |
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mask = mult -1; |
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for (y = 0; y < ysize; y++) { |
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for (x = 0; x < xsize; x++) { |
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index = y*ysize+x; |
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p_red = data.red[index]; |
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p_green = data.green[index]; |
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p_blue = data.blue[index]; |
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if (! palet_len) { |
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pixel = (((psiconv_u32) (p_red*mult) & mask) << (2*colordepth)) + |
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(((psiconv_u32) (p_green*mult) & mask) << colordepth) + |
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((psiconv_u32) (p_blue*mult) & mask); |
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} else { |
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dist = 4; /* Max distance is 3, so this is safe */ |
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pixel = -1; |
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for (i = 0; i < palet_len; i++) { |
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new_dist = (p_red - palet.red[i]) * (p_red - palet.red[i]) + |
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(p_green - palet.green[i]) * (p_green - palet.green[i]) + |
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(p_blue - palet.blue[i]) * (p_blue - palet.blue[i]); |
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if (new_dist < dist) { |
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pixel = i; |
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dist = new_dist; |
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} |
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} |
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} |
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if ((res = psiconv_list_add(*pixels,&pixel))) |
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goto ERROR2; |
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} |
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} |
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return 0; |
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ERROR2: |
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psiconv_list_free(*pixels); |
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ERROR1: |
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return res; |
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} |
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int psiconv_pixel_data_to_bytes(const psiconv_config config, psiconv_pixel_bytes *bytes, int xsize, |
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int ysize, const psiconv_pixel_ints pixels, |
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int colordepth) |
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{ |
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int res; |
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int x,y; |
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psiconv_u32 inputdata; |
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psiconv_u8 outputbyte; |
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psiconv_u32 *pixelptr; |
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int inputbitsleft,outputbitnr,bitsfit; |
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if (!bytes) { |
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psiconv_warn(config,0,0,"NULL pixel data"); |
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res = -PSICONV_E_GENERATE; |
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goto ERROR1; |
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} |
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if (!pixels) { |
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psiconv_warn(config,0,0,"NULL pixel data"); |
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res = -PSICONV_E_GENERATE; |
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goto ERROR1; |
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} |
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if (psiconv_list_length(pixels) != xsize * ysize) { |
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psiconv_warn(config,0,0,"Pixel number is not correct"); |
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res = -PSICONV_E_GENERATE; |
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goto ERROR1; |
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} |
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if (!(*bytes = psiconv_list_new(sizeof(psiconv_u8)))) { |
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res = -PSICONV_E_NOMEM; |
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goto ERROR1; |
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} |
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outputbitnr = 0; |
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outputbyte = 0; |
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for (y = 0; y < ysize; y++) { |
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for (x = 0; x < xsize; x++) { |
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if (!(pixelptr = psiconv_list_get(pixels,y*xsize+x))) { |
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psiconv_warn(config,0,0,"Massive internal corruption"); |
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res = -PSICONV_E_NOMEM; |
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goto ERROR2; |
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} |
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inputbitsleft = colordepth; |
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inputdata = *pixelptr; |
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while (inputbitsleft) { |
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bitsfit = (inputbitsleft+outputbitnr<=8?inputbitsleft:8-outputbitnr); |
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outputbyte |= (inputdata & ((1 << bitsfit) - 1)) << outputbitnr; |
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inputdata = inputdata >> bitsfit; |
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inputbitsleft -= bitsfit; |
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outputbitnr += bitsfit; |
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if (outputbitnr == 8) { |
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if ((res = psiconv_list_add(*bytes,&outputbyte))) |
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goto ERROR2; |
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outputbitnr = 0; |
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outputbyte = 0; |
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} |
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} |
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} |
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/* Always end lines on a byte border */ |
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if (outputbitnr != 0) { |
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if ((res = psiconv_list_add(*bytes,&outputbyte))) |
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goto ERROR2; |
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outputbitnr = 0; |
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outputbyte = 0; |
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} |
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} |
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return 0; |
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ERROR2: |
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psiconv_list_free(*bytes); |
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ERROR1: |
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return res; |
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} |