ckplot

commit 4f191e74da22f0c98ff91fa2bdd890ca858440ef
parent 2729af259a99d7a65dd21904dc6fc8cb4d376d18
Author: aabacchus <ben@bvnf.space>
Date:   Sun,  3 Oct 2021 01:00:41 +0100

kplot: add -w -h width/height flags

Diffstat:
M
kplot.c
 | 
32
++++++++++++++++++++++++++------

1 file changed, 26 insertions(+), 6 deletions(-)
diff --git a/kplot.c b/kplot.c
@@ -10,25 +10,29 @@
 
 void
 usage(char *argv0) {
-    fprintf(stderr, "usage: %s [-HTo] [file.csv]\n", argv0);
+    fprintf(stderr, "usage: %s [-HTwoh] [file.csv]\n", argv0);
     fprintf(stderr, "    -H          treat first line as header\n");
     fprintf(stderr, "    -T format   output format (options \"png\", \"pdf\")"
             " (default: \"pdf\")\n");
     fprintf(stderr, "    -o outfile  output filename\n");
+    fprintf(stderr, "    -w width\n");
+    fprintf(stderr, "    -h height\n");
 }
 
 int
 main(int argc, char **argv) {
-    int ch, flag_H, flag_o, output_type;
+    int ch, flag_H, flag_o, output_type, width, height, w, h;
     char *outfile;
     flag_H = flag_o = 0;
+    width = 600;
+    height = 400;
     enum {
         OUT_PNG,
         OUT_PDF
     };
     output_type = OUT_PDF;
     outfile = "out.pdf";
-    while ((ch = getopt(argc, argv, "HT:o:")) != -1) {
+    while ((ch = getopt(argc, argv, "HT:o:w:h:")) != -1) {
         switch (ch) {
             case 'H':
                 flag_H = 1;
@@ -48,6 +52,22 @@ main(int argc, char **argv) {
                 flag_o = 1;
                 outfile = optarg;
                 break;
+            case 'h':
+                h = atoi(optarg);
+                if (h <= 0) {
+                    fprintf(stderr, "bad height \"%s\"\n", optarg);
+                    return 1;
+                }
+                height = h;
+                break;
+            case 'w':
+                w = atoi(optarg);
+                if (w <= 0) {
+                    fprintf(stderr, "bad width \"%s\"\n", optarg);
+                    return 1;
+                }
+                width = w;
+                break;
             case '?':
                 usage(*argv);
                 return 1;
@@ -101,12 +121,12 @@ main(int argc, char **argv) {
     kplot_attach_data(p, d1, KPLOT_POINTS, NULL);
     kdata_destroy(d1);
     if (output_type == OUT_PNG)
-        surf = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 600, 400);
+        surf = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
     else
-        surf = cairo_pdf_surface_create(outfile, 600, 400);
+        surf = cairo_pdf_surface_create(outfile, width, height);
     cr = cairo_create(surf);
     cairo_surface_destroy(surf);
-    kplot_draw(p, 600.0, 400.0, cr);
+    kplot_draw(p, (double) width, (double) height, cr);
     if (output_type == OUT_PNG)
         cairo_surface_write_to_png(cairo_get_target(cr), outfile);
     cairo_destroy(cr);