diff options
| author | Matthias Melcher <github@matthiasm.com> | 2025-05-11 12:34:04 +0200 |
|---|---|---|
| committer | Matthias Melcher <github@matthiasm.com> | 2025-05-11 12:34:04 +0200 |
| commit | c28237d7567541f50a6d303c52c9618bfed5ea26 (patch) | |
| tree | 8905327b0fd057cc90b4a935cc9fe7d3245f4ade /src | |
| parent | 74b0dc7d950c98ed38015a5f8f85e199637f7948 (diff) | |
Set default DPI to 300 in fl_write_png
Previously, the DPI value was completely random, resulting
in some interesting scaling when reading the png in other apps.
Diffstat (limited to 'src')
| -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) { |