diff options
Diffstat (limited to 'src/vcr.c')
| -rw-r--r-- | src/vcr.c | 34 |
1 files changed, 33 insertions, 1 deletions
@@ -58,6 +58,7 @@ #include <stdarg.h> #include <stdint.h> #include <stdlib.h> +#include <time.h> #ifdef USE_XLIB #include <X11/Xlib.h> @@ -204,6 +205,7 @@ typedef struct vcr_dest_t { png_infop info_ctx; png_structp png_ctx; FILE *output; + png_text text[3]; } png; #endif /* USE_PNG */ }; @@ -617,7 +619,7 @@ vcr_dest_t * vcr_dest_xpicture_new(vcr_backend_t *vbe, Picture picture) #ifdef USE_PNG -vcr_dest_t * vcr_dest_png_new(vcr_backend_t *vbe, FILE *output) +vcr_dest_t * vcr_dest_png_new(vcr_backend_t *vbe, FILE *output, const char *name, const char *payload) { vcr_dest_t *dest; @@ -651,6 +653,36 @@ vcr_dest_t * vcr_dest_png_new(vcr_backend_t *vbe, FILE *output) return NULL; } + { + time_t now = time(NULL); + struct tm *t = localtime(&now); + char t_str[32]; + + strftime(t_str, sizeof(t_str), "%F %T %Z", t); + + /* we always stick three text fields into the PNGs, the caller is expected to always + * provide a `date` style string for timestamp, the chart name for name, and the + * payload is flexible. For strobes it's expected the payload may contain some + * context about the cause for strobing. + */ + dest->png.text[0].compression = -1; /* none */ + dest->png.text[0].key = "timestamp"; + dest->png.text[0].text = t_str; + dest->png.text[0].text_length = strlen(t_str); + + dest->png.text[1].compression = -1; /* none */ + dest->png.text[1].key = "name"; + dest->png.text[1].text = (char *)name; + dest->png.text[1].text_length = name ? strlen(name) : 0; + + dest->png.text[2].compression = -1; /* none */ + dest->png.text[2].key = "payload"; + dest->png.text[2].text = (char *)payload; + dest->png.text[2].text_length = payload ? strlen(payload) : 0; + + png_set_text(dest->png.png_ctx, dest->png.info_ctx, dest->png.text, 3); + } + png_init_io(dest->png.png_ctx, output); return dest; |