diff options
| -rw-r--r-- | src/fl_write_png.cxx | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/fl_write_png.cxx b/src/fl_write_png.cxx index 855e03551..c46072933 100644 --- a/src/fl_write_png.cxx +++ b/src/fl_write_png.cxx @@ -158,6 +158,10 @@ int fl_write_png(const char *filename, const char *pixels, int w, int h, int d, PNG_FILTER_TYPE_DEFAULT); png_set_sRGB(pptr, iptr, PNG_sRGB_INTENT_PERCEPTUAL); + double dpi = 300.0; + int dots_per_meter = (int)(dpi / (2.54 / 100.0)); + png_set_pHYs(pptr, iptr, dots_per_meter, dots_per_meter, PNG_RESOLUTION_METER); + png_write_info(pptr, iptr); for (int i = 0; i < h; i++, ptr += ld) { |