bug fixes, added background image

[winnie] / src / pixmap.cc

diff --git a/src/pixmap.cc b/src/pixmap.cc
index 5c9b242..ada337d 100644 (file)
--- a/src/pixmap.cc
+++ b/src/pixmap.cc
@@ -9,6 +9,22 @@ 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 +44,7 @@ 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 +74,61 @@ 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