small tweaks

Lib/.gitignore

@@ -0,0 +1,3 @@
+
+*.png
+

Lib/image.c

@@ -19,7 +19,7 @@ Image_print_version(int flag)
 char	*ptr;
 
 fflush(stdout);
-printf("-+- This is the `tthimage' library v%s (dwtfywl 2022) tTh\n",
+printf("-+- This is the `tthimage' library v%s (wtfyw 2022) tTh\n",
                                     IMAGE_VERSION_STRING);
 if (flag)
     {
@@ -594,29 +594,25 @@ fprintf(stderr, "   %p  %p  %p  %p\n", im->Rpix, im->Gpix, im->Bpix, im->Apix);
 im->magic = 0L;			/* mark dirty/invalid. */
 im->type = IMAGE_NONE;			/* -1, et tusors */
 
-if (im->Rpix != NULL)
-    {
+if (im->Rpix != NULL) {
     for (line=0; line<im->height; line++)
         if (im->Rpix[line] != NULL)     free(im->Rpix[line]);
     free(im->Rpix);	im->Rpix = NULL;
     }
 
-if (im->Gpix != NULL)
-    {
+if (im->Gpix != NULL) {
     for (line=0; line<im->height; line++)
         if (im->Gpix[line] != NULL)     free(im->Gpix[line]);
     free(im->Gpix);	im->Gpix = NULL;
     }
 
-if (im->Bpix != NULL)
-    {
+if (im->Bpix != NULL) {
     for (line=0; line<im->height; line++)
         if (im->Bpix[line] != NULL)     free(im->Bpix[line]);
     free(im->Bpix);	im->Bpix = NULL;
     }
 
-if (im->Apix != NULL)
-    {
+if (im->Apix != NULL) {
     for (line=0; line<im->height; line++)
         if (im->Apix[line] != NULL)     free(im->Apix[line]);
     free(im->Apix);	im->Apix = NULL;

Lib/pixeliz.c

@@ -11,8 +11,7 @@
 #include  "../tthimage.h"
 
 /*::------------------------------------------------------------------::*/
-int
-Image_pixeliz_0(Image_Desc *src, Image_Desc *dst, int w, int h)
+int Image_pixeliz_0(Image_Desc *src, Image_Desc *dst, int w, int h)
 {
 int		x, y, foo, N;
 int		r, g, b;

Lib/png.c

@@ -1,10 +1,12 @@
 /*
 
+		------ libtthimage ------
 	PNG aka "portable network graphics"s.
 
 */
 
 #include  <stdio.h>
+#include  <stdlib.h>
 #include  <unistd.h>
 #include  <string.h>
 #include  <png.h>
@@ -16,46 +18,69 @@
 #include  "../tthimage.h"
 
 /*
- *		   les infos et le code ici viennent de 
- *		http://www.libpng.org/pub/png/pngbook.html
+ * 		http://www.libpng.org/pub/png/pngbook.html
  */
-
-
-/* static mainprog_info wpng_info; */
-
-
-
 /*::------------------------------------------------------------------::*/
-static void writepng_version_info(void)
+void write_png_version_info(void)
 {
-  fprintf(stderr, "   Compiled with libpng %s; using libpng %s.\n",
-    PNG_LIBPNG_VER_STRING, png_libpng_ver);
-  fprintf(stderr, "   Compiled with zlib %s; using zlib %s.\n",
-    ZLIB_VERSION, zlib_version);
+fprintf(stderr, "   Compiled with libpng %s; using libpng %s.\n",
+				PNG_LIBPNG_VER_STRING, png_libpng_ver);
+fprintf(stderr, "   Compiled with zlib %s; using zlib %s.\n",
+				ZLIB_VERSION, zlib_version);
 }
 /*::------------------------------------------------------------------::*/
 Image_Desc * Image_PNG_alloc_load(char *fname, int k)
 {
 
 #if DEBUG_LEVEL
-fprintf(stderr, "%s ( '%s' %d )\n", __func__, fname, k);
-writepng_version_info();
+fprintf(stderr, ">>> %s ( '%s' %d )\n", __func__, fname, k);
+write_png_version_info();
 #endif
 
 return NULL;
 }
 /*::------------------------------------------------------------------::*/
+/*
+ *			http://zarb.org/~gc/html/libpng.html
+ *			https://gist.github.com/niw/5963798
+ */
 int Image_save_as_PNG(Image_Desc *img, char *fname, int p1, int p2)
 {
-FILE		*fp;
-int		x, y, foo;
-png_uint_32	pngv;
-
+FILE			*fp;
+int			x, y, foo;
+png_structp		png;
+png_infop		info;
 #if DEBUG_LEVEL
-fprintf(stderr, "%s ( %p '%s' %d %d )\n", __func__, img, fname, p1, p2);
-writepng_version_info();
+fprintf(stderr, ">>> %s ( %p '%s' %d %d )\n", __func__, img, fname, p1, p2);
+write_png_version_info();
 #endif
 
+fp = fopen(fname, "wb");
+if (NULL == fp) {
+	perror(fname);
+	return BASIC_IO_WR_ERR;
+	}
+
+png = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+
+info = png_create_info_struct(png);
+
+if (setjmp(png_jmpbuf(png))) abort();
+
+png_init_io(png, fp);
+
+
+png_set_IHDR(	png,
+		info,
+		img->width, img->height,
+		8,
+		PNG_COLOR_TYPE_RGBA,
+		PNG_INTERLACE_NONE,
+		PNG_COMPRESSION_TYPE_DEFAULT,
+		PNG_FILTER_TYPE_DEFAULT			);
+
+png_write_info(png, info);
+
 return FULL_NUCKED;
 }
 /*::------------------------------------------------------------------::*/

Lib/t_png.c

@@ -5,8 +5,11 @@
 #include  <stdio.h>
 #include  <stdlib.h>
 
+#include  <png.h>
+
 #include  "../tthimage.h"
 
+void write_png_version_info(void);
 
 /*::------------------------------------------------------------------::*/
 /*::------------------------------------------------------------------::*/
@@ -15,12 +18,10 @@ int main(int argc, char *argv[])
 {
 Image_Desc	*img;
 int		foo;
-char		*fname = "foo.png";
+char		*fname = "proto.png";
 
 Image_print_version(0);
 
-writepng_version_info();
-
 if (2==argc) {
 	fname = argv[1];
 	}