added 3dengfx into the repo, probably not the correct version for this

[summerhack] / src / 3dengfx / src / gfx / image.c

diff --git a/src/3dengfx/src/gfx/image.c b/src/3dengfx/src/gfx/image.c
new file mode 100644 (file)
index 0000000..bec0b6c
--- /dev/null
+++ b/src/3dengfx/src/gfx/image.c
@@ -0,0 +1,148 @@
+/*
+This is a small image library.
+Copyright (C) 2004 John Tsiombikas <nuclear@siggraph.org>
+
+This library 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 2 of the License, or
+(at your option) any later version.
+
+This library 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 library; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+/* image file library
+ *
+ * author: John Tsiombikas 2003
+ * modified: John Tsiombikas 2004
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "image.h"
+
+#ifdef IMGLIB_USE_PNG
+int check_png(FILE *fp);
+void *load_png(FILE *fp, unsigned long *xsz, unsigned long *ysz);
+int save_png(FILE *fp, void *pixels, unsigned long xsz, unsigned long ysz);
+#endif /* IMGLIB_USE_PNG */
+
+#ifdef IMGLIB_USE_JPEG
+int check_jpeg(FILE *fp);
+void *load_jpeg(FILE *fp, unsigned long *xsz, unsigned long *ysz);
+int save_jpeg(FILE *fp, void *pixels, unsigned long xsz, unsigned long ysz);
+#endif /* IMGLIB_USE_JPEG */
+
+#ifdef IMGLIB_USE_TGA
+int check_tga(FILE *fp);
+void *load_tga(FILE *fp, unsigned long *xsz, unsigned long *ysz);
+int save_tga(FILE *fp, void *pixels, unsigned long xsz, unsigned long ysz);
+#endif /* IMGLIB_USE_TGA */
+
+#ifdef IMGLIB_USE_PPM
+int check_ppm(FILE *fp);
+void *load_ppm(FILE *fp, unsigned long *xsz, unsigned long *ysz);
+int save_ppm(FILE *fp, void *pixels, unsigned long xsz, unsigned long ysz);
+#endif /* IMGLIB_USE_PPM */
+
+
+static unsigned long save_flags;
+
+
+void *load_image(const char *fname, unsigned long *xsz, unsigned long *ysz) {
+       FILE *file;
+
+       if(!(file = fopen(fname, "rb"))) {
+               fprintf(stderr, "Image loading error: could not open file %s\n", fname);
+               return 0;
+       }
+       
+#ifdef IMGLIB_USE_PNG
+       if(check_png(file)) {
+               return load_png(file, xsz, ysz);
+       }
+#endif /* IMGLIB_USE_PNG */
+       
+#ifdef IMGLIB_USE_JPEG
+       if(check_jpeg(file)) {
+               return load_jpeg(file, xsz, ysz);
+       }
+#endif /* IMGLIB_USE_JPEG */
+       
+#ifdef IMGLIB_USE_TGA
+       if(check_tga(file)) {
+               return load_tga(file, xsz, ysz);
+       }
+#endif /* IMGLIB_USE_TGA */
+
+#ifdef IMGLIB_USE_PPM
+       if(check_ppm(file)) {
+               return load_ppm(file, xsz, ysz);
+       }
+#endif /* IMGLIB_USE_PPM */
+
+       fclose(file);
+       return 0;
+}
+
+void free_image(void *img) {
+       free(img);
+}
+
+int save_image(const char *fname, void *pixels, unsigned long xsz, unsigned long ysz, enum image_file_format fmt) {
+       FILE *fp;
+
+       if(!(fp = fopen(fname, "wb"))) {
+               fprintf(stderr, "Image saving error: could not open file %s for writing\n", fname);
+               return -1;
+       }
+
+       switch(fmt) {
+       case IMG_FMT_PNG:
+#ifdef IMGLIB_USE_PNG
+               save_png(fp, pixels, xsz, ysz);
+               break;
+#endif /* IMGLIB_USE_PNG */
+
+       case IMG_FMT_JPEG:
+#ifdef IMGLIB_USE_JPEG
+               save_jpeg(fp, pixels, xsz, ysz);
+#endif /* IMGLIB_USE_JPEG */
+               break;
+               
+       case IMG_FMT_TGA:
+#ifdef IMGLIB_USE_TGA
+               save_tga(fp, pixels, xsz, ysz);
+#endif /* IMGLIB_USE_TGA */
+               break;
+
+       case IMG_FMT_PPM:
+#ifdef IMGLIB_USE_PPM
+               save_ppm(fp, pixels, xsz, ysz);
+#endif /* IMGLIB_USE_PPM */
+               break;
+
+       default:
+               fprintf(stderr, "Image saving error: error saving %s, invalid format specification", fname);
+               break;
+       }
+
+       fclose(fp);
+       
+       return 0;
+}
+
+
+void set_image_save_flags(unsigned int flags) {
+       save_flags = flags;
+}
+
+unsigned int get_image_save_flags(void) {
+       return save_flags;
+}