Bug 702522: Add resolution to output PNG files.

diff --git a/source/fitz/output-png.c b/source/fitz/output-png.c
index 8016588a483053b6912a918a954a5ee0786281f1..60958dbae7ed6da695f46c36b91e0e41000a9308 100644 (file)
--- a/source/fitz/output-png.c
+++ b/source/fitz/output-png.c
@@ -171,6 +171,11 @@ png_write_header(fz_context *ctx, fz_band_writer *writer_, fz_colorspace *cs)
        fz_write_data(ctx, out, pngsig, 8);
        putchunk(ctx, out, "IHDR", head, 13);
 
+       big32(head+0, writer->super.xres * 100/2.54f + 0.5f);
+       big32(head+4, writer->super.yres * 100/2.54f + 0.5f);
+       head[8] = 1; /* metre */
+       putchunk(ctx, out, "pHYs", head, 9);
+
        png_write_icc(ctx, writer, cs);
 }