Linux Standard Base Desktop Specification 4.1 | ||
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png_get_x_pixels_per_meter() shall obtain the horizontal pixel density in pixels per meter from its PNG_pHYs chunk data stored in info_ptr, if the unit for resolution is pixels per meter.
On success, png_get_x_pixels_per_meter() shall return horizontal pixel density in pixels per meter. Otherwise png_get_x_pixels_per_meter() shall return 0.
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png_get_x_offset_pixels | Up | png_get_y_offset_pixels |