def dpi_fixture(self, chunks_):
horz_px_per_unit, vert_px_per_unit, units_specifier = 1654, 945, 1
horz_dpi, vert_dpi = 42, 24
chunks_.pHYs.horz_px_per_unit = horz_px_per_unit
chunks_.pHYs.vert_px_per_unit = vert_px_per_unit
chunks_.pHYs.units_specifier = units_specifier
png_parser = _PngParser(chunks_)
return png_parser, horz_dpi, vert_dpi
def dpi_fixture(self, chunks_):
horz_px_per_unit, vert_px_per_unit, units_specifier = 1654, 945, 1
horz_dpi, vert_dpi = 42, 24
chunks_.pHYs.horz_px_per_unit = horz_px_per_unit
chunks_.pHYs.vert_px_per_unit = vert_px_per_unit
chunks_.pHYs.units_specifier = units_specifier
png_parser = _PngParser(chunks_)
return png_parser, horz_dpi, vert_dpi
def no_dpi_fixture(self, request, chunks_):
"""
Scenarios are: 1) no pHYs chunk in PNG stream, 2) units specifier
other than 1; 3) px_per_unit is 0; 4) px_per_unit is None
"""
units_specifier, px_per_unit = request.param
if units_specifier == -1:
chunks_.pHYs = None
else:
chunks_.pHYs.horz_px_per_unit = px_per_unit
chunks_.pHYs.vert_px_per_unit = px_per_unit
chunks_.pHYs.units_specifier = units_specifier
png_parser = _PngParser(chunks_)
return png_parser
def no_dpi_fixture(self, request, chunks_):
"""
Scenarios are: 1) no pHYs chunk in PNG stream, 2) units specifier
other than 1; 3) px_per_unit is 0; 4) px_per_unit is None
"""
units_specifier, px_per_unit = request.param
if units_specifier == -1:
chunks_.pHYs = None
else:
chunks_.pHYs.horz_px_per_unit = px_per_unit
chunks_.pHYs.vert_px_per_unit = px_per_unit
chunks_.pHYs.units_specifier = units_specifier
png_parser = _PngParser(chunks_)
return png_parser
def dimensions_fixture(self, chunks_):
px_width, px_height = 12, 34
chunks_.IHDR.px_width = px_width
chunks_.IHDR.px_height = px_height
png_parser = _PngParser(chunks_)
return png_parser, px_width, px_height
def dimensions_fixture(self, chunks_):
px_width, px_height = 12, 34
chunks_.IHDR.px_width = px_width
chunks_.IHDR.px_height = px_height
png_parser = _PngParser(chunks_)
return png_parser, px_width, px_height
