Module basics 

Foundation types, constants, and path command utilities.

Port of agg_basics.h — the most fundamental types in AGG that everything else depends on.

Structs

ConstRowInfo

Const version of row info.

PointBase

A 2D point. Port of C++ point_base<T>.

Rect

A rectangle defined by two corner points. Port of C++ rect_base<T>.

RowInfo

Information about a row in a rendering buffer. Port of C++ row_info<T> — used with raw pointers for pixel buffer access.

VertexBase

A vertex with coordinates and a path command. Port of C++ vertex_base<T>.

Enums

FillingRule

Filling rule for polygon rasterization.

Constants

COVER_FULL

COVER_MASK

COVER_NONE

COVER_SHIFT

COVER_SIZE

PATH_CMD_CATROM

PATH_CMD_CURVE3

PATH_CMD_CURVE4

PATH_CMD_CURVE_N

PATH_CMD_END_POLY

PATH_CMD_LINE_TO

PATH_CMD_MASK

PATH_CMD_MOVE_TO

PATH_CMD_STOP

PATH_CMD_UBSPLINE

PATH_FLAGS_CCW

PATH_FLAGS_CLOSE

PATH_FLAGS_CW

PATH_FLAGS_MASK

PATH_FLAGS_NONE

PI

POLY_SUBPIXEL_MASK

POLY_SUBPIXEL_SCALE

POLY_SUBPIXEL_SHIFT

These constants determine the subpixel accuracy (number of fractional bits). With 8-bit fractional part and 32-bit integers, coordinate capacity is 24 bits.

Traits

VertexSource

The fundamental vertex source interface. Every shape, path, and converter in AGG implements this trait to produce a stream of vertices.

Functions

clear_orientation

Remove orientation flags from a command.

deg2rad

Convert degrees to radians.

get_close_flag

Extract the close flag from a command.

get_orientation

Extract the orientation flags from a command.

iceil

Ceiling of a double as a signed integer. Matches C++ AGG’s iceil.

ifloor

Floor a double to the nearest integer toward negative infinity. Matches C++ AGG’s ifloor.

intersect_rectangles

Compute the intersection of two rectangles.

iround

Round a double to the nearest integer (round half away from zero). Matches C++ AGG’s iround (non-FISTP, non-QIFIST path).

is_ccw

Returns true if c has the counter-clockwise flag set.

is_close

Returns true if c is a close polygon command.

is_closed

Returns true if c has the close flag set.

is_curve

Returns true if c is a curve command (curve3 or curve4).

is_curve3

Returns true if c is a quadratic curve command.

is_curve4

Returns true if c is a cubic curve command.

is_cw

Returns true if c has the clockwise flag set.

is_drawing

Returns true if c is a drawing command (line_to through curveN).

is_end_poly

Returns true if c is an end_poly command (with any flags).

is_equal_eps

Compare two floating-point values for approximate equality using relative comparison scaled by the smaller exponent. Port of C++ is_equal_eps.

is_line_to

Returns true if c is a line_to command.

is_move_to

Returns true if c is a move_to command.

is_next_poly

Returns true if c starts a new polygon (stop, move_to, or end_poly).

is_oriented

Returns true if c has any orientation flag set.

is_stop

Returns true if c is the stop command.

is_vertex

Returns true if c is a vertex command (move_to through curveN).

mul_one

Fixed-point multiply: (a * b + half) >> shift, with rounding. Replaces C++ template mul_one<Shift>::mul.

rad2deg

Convert radians to degrees.

saturation_iround

Round v to int, clamping to [-limit, limit]. Replaces C++ template saturation<Limit>::iround.

set_orientation

Set the orientation flags on a command.

uceil

Ceiling of a double as an unsigned integer. Matches C++ AGG’s uceil.

ufloor

Floor a double to the nearest unsigned integer (truncation toward zero). Matches C++ AGG’s ufloor.

unite_rectangles

Compute the union (bounding box) of two rectangles.

uround

Round a double to the nearest unsigned integer (round half up). Matches C++ AGG’s uround.

Type Aliases

CoverType

The type used for anti-aliasing coverage values.

PointD

PointF

PointI

RectD

Rectangle with f64 coordinates.

RectF

Rectangle with f32 coordinates.

RectI

Rectangle with i32 coordinates.

VertexD

VertexF

VertexI