claw::graphic::gif::screen_descriptor Struct Reference

Some informations on the screen where the image is rendered. More...

List of all members.

Public Member Functions
bool	has_global_color_table () const
	Tell if the file contains a global palette.
unsigned int	color_palette_size () const
	Get the size of the palette, if any.
Public Attributes
u_int_16	screen_width
	Logical screen width.
u_int_16	screen_height
	Logical screen height.
u_int_8	packed
	Some flags.
u_int_8	background_color
	Background color index.
u_int_8	aspect_ratio
	Pixel aspect ratio.

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Detailed Description

Some informations on the screen where the image is rendered.

Definition at line 111 of file gif.hpp.

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Member Function Documentation

unsigned int claw::graphic::gif::screen_descriptor::color_palette_size

(

)

const

Get the size of the palette, if any.

Definition at line 48 of file gif.cpp.

Referenced by claw::graphic::gif::reader::read_screen_descriptor().

{
  if ( !has_global_color_table() )
    return 0;
  else
    return 1 << ((packed & 0x07) + 1);
} // gif::screen_descriptor::color_palette_size()

bool claw::graphic::gif::screen_descriptor::has_global_color_table

(

)

const

Tell if the file contains a global palette.

Definition at line 39 of file gif.cpp.

References packed.

Referenced by claw::graphic::gif::reader::fill_background(), and claw::graphic::gif::reader::read_screen_descriptor().

{
  return (packed & 0x80) != 0;
} // gif::screen_descriptor::has_global_color_table()

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Member Data Documentation

u_int_8 claw::graphic::gif::screen_descriptor::aspect_ratio

Pixel aspect ratio.

Definition at line 131 of file gif.hpp.

u_int_8 claw::graphic::gif::screen_descriptor::background_color

Background color index.

Definition at line 128 of file gif.hpp.

Referenced by claw::graphic::gif::reader::fill_background().

u_int_8 claw::graphic::gif::screen_descriptor::packed

Some flags.

Definition at line 125 of file gif.hpp.

Referenced by has_global_color_table().

u_int_16 claw::graphic::gif::screen_descriptor::screen_height

Logical screen height.

Definition at line 122 of file gif.hpp.

Referenced by claw::graphic::gif::reader::make_frames(), and claw::graphic::gif::reader::read_frame_data().

u_int_16 claw::graphic::gif::screen_descriptor::screen_width

Logical screen width.

Definition at line 119 of file gif.hpp.

Referenced by claw::graphic::gif::reader::make_frames(), and claw::graphic::gif::reader::read_frame_data().

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The documentation for this struct was generated from the following files:

• gif.hpp
• code/gif.cpp