--- /dev/null
+/*
+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>
+#include "pixmap.h"
+
+Pixmap::Pixmap()
+{
+ width = height = 0;
+ 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) {
+ delete [] pixels;
+ }
+}
+
+int Pixmap::get_width() const
+{
+ return width;
+}
+
+int Pixmap::get_height() const
+{
+ return height;
+}
+
+Rect Pixmap::get_rect() const
+{
+ Rect rect(0, 0, width, height);
+ return rect;
+}
+
+bool Pixmap::set_image(int x, int y, unsigned char *pix)
+{
+ delete [] pixels;
+
+ pixels = new unsigned char[x * y * 4];
+ width = x;
+ height = y;
+
+ if(pix) {
+ memcpy(pixels, pix, x * y * 4);
+ }
+ return true;
+}
+
+const unsigned char *Pixmap::get_image() const
+{
+ return pixels;
+}
+
+unsigned char *Pixmap::get_image()
+{
+ return pixels;
+}
+
+bool Pixmap::load(const char *fname)
+{
+ 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
+{
+ if(!pixels) {
+ return false;
+ }
+
+ FILE *fp = fopen(fname, "wb");
+ if(!fp) {
+ fprintf(stderr, "failed to save pixmap: %s: %s\n", fname, strerror(errno));
+ return false;
+ }
+
+ fprintf(fp, "P6\n%d %d\n255\n", width, height);
+
+ for(int i=0; i<width * height; i++) {
+ fputc(pixels[i * 4], fp);
+ fputc(pixels[i * 4 + 1], fp);
+ fputc(pixels[i * 4 + 2], fp);
+ }
+
+ fclose(fp);
+ return true;
+}