added license GPL

[winnie] / src / pixmap.cc

diff --git a/src/pixmap.cc b/src/pixmap.cc
index 5c9b242..8e50fa3 100644 (file)
--- a/src/pixmap.cc
+++ b/src/pixmap.cc
@@ -1,3 +1,24 @@
+/*
+winnie - an experimental window system
+
+Copyright (C) 2013 Eleni Maria Stea
+
+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 3 of the License, or
+(at your option) any later version.
+
+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, see <http://www.gnu.org/licenses/>.
+
+Author: Eleni Maria Stea <elene.mst@gmail.com>
+*/
+
 #include <stdio.h>
 #include <string.h>
 #include <errno.h>
@@ -9,6 +30,22 @@ Pixmap::Pixmap()
        pixels = 0;
 }
 
+Pixmap::Pixmap(const Pixmap &pixmap)
+{
+       width = height = 0;
+       pixels = 0;
+       set_image(pixmap.width, pixmap.height, pixmap.pixels);
+}
+
+Pixmap &Pixmap::operator=(const Pixmap &pixmap)
+{
+       if(this != &pixmap) {
+               set_image(pixmap.width, pixmap.height, pixmap.pixels);
+       }
+
+       return *this;
+}
+
 Pixmap::~Pixmap()
 {
        if(pixels) {
@@ -28,7 +65,7 @@ int Pixmap::get_height() const
 
 Rect Pixmap::get_rect() const
 {
-       Rect rect = {0, 0, width, height};
+       Rect rect(0, 0, width, height);
        return rect;
 }
 
@@ -58,7 +95,61 @@ unsigned char *Pixmap::get_image()
 
 bool Pixmap::load(const char *fname)
 {
-       return false;   // TODO
+       FILE *fp;
+       int hdrline = 0;
+
+       if(!(fp = fopen(fname, "rb"))) {
+               fprintf(stderr, "failed to open pixmap: %s: %s\n", fname, strerror(errno));
+               return false;
+       }
+
+       /* read ppm header */
+       while(hdrline < 3) {
+               char buf[64];
+
+               if(!fgets(buf, sizeof buf, fp))
+                       goto err;
+               
+               /* skip comments */
+               if(buf[0] == '#')
+                       continue;
+
+               switch(hdrline++) {
+               case 0:
+                       /* first header line should be P6 */
+                       if(strcmp(buf, "P6\n") != 0)
+                               goto err;
+                       break;
+
+               case 1:
+                       /* second header line contains the pixmap dimensions */
+                       if(sscanf(buf, "%d %d", &width, &height) != 2)
+                               goto err;
+                       break;
+               }
+       }
+
+       set_image(width, height, 0);
+
+       for(int i=0; i<width * height * 4; i++) {
+               int c;
+               if(i % 4 != 3) {
+                       c = fgetc(fp);
+                       if(c < 0)
+                               goto err;
+               }
+               else {
+                       c = 255;
+               }
+               pixels[i] = c;
+       }
+       fclose(fp);
+       return true;
+
+err:
+       fprintf(stderr, "failed to load pixmap: %s\n", fname);
+       fclose(fp);
+       return false;
 }
 
 bool Pixmap::save(const char *fname) const