png_get_IHDR     2398 third_party/libpng/png.h extern PNG_EXPORT(png_uint_32,png_get_IHDR) PNGARG((png_structp png_ptr,
png_get_IHDR      152 tools/imagediff/image_diff_png.cc   png_get_IHDR(png_ptr, info_ptr, &w, &h, &bit_depth, &color_type,
png_get_IHDR      170 ui/gfx/codec/png_codec.cc   png_get_IHDR(png_ptr, info_ptr, &w, &h, &bit_depth, &color_type,