b650366d80
The pixmap_browser demo now supports all image formats via Fl_Shared_Image. Dropped image file stuff from image demo. Added Fl_Tiled_Image class, which tiles an Fl_Image, useful for tiling a background image in groups. Added tiled_image demo. git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@1725 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
162 lines
4.0 KiB
C++
162 lines
4.0 KiB
C++
//
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// "$Id: Fl_PNM_Image.cxx,v 1.1.2.1 2001/11/24 18:07:57 easysw Exp $"
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//
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// Fl_PNM_Image routines.
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//
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// Copyright 1997-2001 by Easy Software Products.
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//
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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; either
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// version 2 of the License, or (at your option) any later version.
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//
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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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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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// USA.
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//
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// Please report all bugs and problems to "fltk-bugs@fltk.org".
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//
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// Contents:
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//
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//
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//
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// Include necessary header files...
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//
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#include <FL/Fl.H>
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#include <FL/Fl_PNM_Image.H>
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#include "config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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//
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// 'Fl_PNM_Image::Fl_PNM_Image()' - Load a PNM image...
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//
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Fl_PNM_Image::Fl_PNM_Image(const char *name) // I - File to read
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: Fl_RGB_Image(0,0,0) {
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FILE *fp; // File pointer
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int x, y; // Looping vars
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char line[1024], // Input line
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*lineptr; // Pointer in line
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uchar *ptr, // Pointer to pixel values
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byte, // Byte from file
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bit; // Bit in pixel
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int format, // Format of PNM file
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val, // Pixel value
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maxval; // Maximum pixel value
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//
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// Read the file header in the format:
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//
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// Pformat
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// # comment1
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// # comment2
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// ...
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// # commentN
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// width
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// height
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// max sample
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//
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lineptr = fgets(line, sizeof(line), fp);
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lineptr ++;
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format = atoi(lineptr);
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while (isdigit(*lineptr)) lineptr ++;
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while (lineptr != NULL && w() == 0) {
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if (*lineptr == '\0' || *lineptr == '#') {
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lineptr = fgets(line, sizeof(line), fp);
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} else if (isdigit(*lineptr)) {
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w(atoi(lineptr));
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while (isdigit(*lineptr)) lineptr ++;
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} else lineptr ++;
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}
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while (lineptr != NULL && h()) {
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if (*lineptr == '\0' || *lineptr == '#') {
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lineptr = fgets(line, sizeof(line), fp);
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} else if (isdigit(*lineptr)) {
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h(atoi(lineptr));
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while (isdigit(*lineptr)) lineptr ++;
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} else lineptr ++;
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}
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if (format != 1 && format != 4) {
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maxval = 0;
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while (lineptr != NULL && maxval == 0) {
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if (*lineptr == '\0' || *lineptr == '#') {
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lineptr = fgets(line, sizeof(line), fp);
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} else if (isdigit(*lineptr)) {
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maxval = atoi(lineptr);
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while (isdigit(*lineptr)) lineptr ++;
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} else lineptr ++;
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}
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} else maxval = 1;
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// Allocate memory...
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if (format == 1 || format == 2 || format == 4 || format == 5) d(1);
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else d(3);
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array = new uchar[w() * h() * d()];
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// Read the image file...
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for (y = 0; y < h(); y ++) {
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ptr = (uchar *)array + y * w() * d();
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switch (format) {
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case 1 :
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case 2 :
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for (x = w(); x > 0; x --)
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if (fscanf(fp, "%d", &val) == 1) *ptr++ = 255 * val / maxval;
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break;
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case 3 :
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for (x = w(); x > 0; x --) {
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if (fscanf(fp, "%d", &val) == 1) *ptr++ = 255 * val / maxval;
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if (fscanf(fp, "%d", &val) == 1) *ptr++ = 255 * val / maxval;
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if (fscanf(fp, "%d", &val) == 1) *ptr++ = 255 * val / maxval;
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}
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break;
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case 4 :
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for (x = w(), byte = getc(fp), bit = 128; x > 0; x --) {
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if (byte & bit) *ptr++ = 255;
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else *ptr++ = 0;
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if (bit > 1) bit >>= 1;
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else {
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bit = 128;
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byte = getc(fp);
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}
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}
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break;
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case 5 :
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case 6 :
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fread(ptr, w(), d(), fp);
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break;
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}
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}
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fclose(fp);
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}
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//
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// End of "$Id: Fl_PNM_Image.cxx,v 1.1.2.1 2001/11/24 18:07:57 easysw Exp $".
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//
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