SkEncodedOrigin.h File Reference

#include "include/core/SkMatrix.h"

Go to the source code of this file.

Enumerations
enum	SkEncodedOrigin {   kTopLeft_SkEncodedOrigin = 1 , kTopRight_SkEncodedOrigin = 2 , kBottomRight_SkEncodedOrigin = 3 , kBottomLeft_SkEncodedOrigin = 4 ,   kLeftTop_SkEncodedOrigin = 5 , kRightTop_SkEncodedOrigin = 6 , kRightBottom_SkEncodedOrigin = 7 , kLeftBottom_SkEncodedOrigin = 8 ,   kDefault_SkEncodedOrigin = kTopLeft_SkEncodedOrigin , kLast_SkEncodedOrigin = kLeftBottom_SkEncodedOrigin }

Functions
static SkMatrix	SkEncodedOriginToMatrix (SkEncodedOrigin origin, int w, int h)
static bool	SkEncodedOriginSwapsWidthHeight (SkEncodedOrigin origin)

Enumeration Type Documentation

SkEncodedOrigin

enum SkEncodedOrigin

Enumerator
kTopLeft_SkEncodedOrigin
kTopRight_SkEncodedOrigin
kBottomRight_SkEncodedOrigin
kBottomLeft_SkEncodedOrigin
kLeftTop_SkEncodedOrigin
kRightTop_SkEncodedOrigin
kRightBottom_SkEncodedOrigin
kLeftBottom_SkEncodedOrigin
kDefault_SkEncodedOrigin
kLast_SkEncodedOrigin

Definition at line 14 of file SkEncodedOrigin.h.

                     {
    kTopLeft_SkEncodedOrigin     = 1, // Default
    kTopRight_SkEncodedOrigin    = 2, // Reflected across y-axis
    kBottomRight_SkEncodedOrigin = 3, // Rotated 180
    kBottomLeft_SkEncodedOrigin  = 4, // Reflected across x-axis
    kLeftTop_SkEncodedOrigin     = 5, // Reflected across x-axis, Rotated 90 CCW
    kRightTop_SkEncodedOrigin    = 6, // Rotated 90 CW
    kRightBottom_SkEncodedOrigin = 7, // Reflected across x-axis, Rotated 90 CW
    kLeftBottom_SkEncodedOrigin  = 8, // Rotated 90 CCW
    kDefault_SkEncodedOrigin     = kTopLeft_SkEncodedOrigin,
    kLast_SkEncodedOrigin        = kLeftBottom_SkEncodedOrigin,
};

Function Documentation

SkEncodedOriginSwapsWidthHeight()

static bool SkEncodedOriginSwapsWidthHeight ( SkEncodedOrigin  origin )

inlinestatic

Return true if the encoded origin includes a 90 degree rotation, in which case the width and height of the source data are swapped relative to a correctly oriented destination.

Definition at line 50 of file SkEncodedOrigin.h.

                                                                           {
    return origin >= kLeftTop_SkEncodedOrigin;
}

SkEncodedOriginToMatrix()

static SkMatrix SkEncodedOriginToMatrix ( SkEncodedOrigin  origin, int  w, int  h  )

inlinestatic

Given an encoded origin and the width and height of the source data, returns a matrix that transforms the source rectangle with upper left corner at [0, 0] and origin to a correctly oriented destination rectangle of [0, 0, w, h].

Definition at line 32 of file SkEncodedOrigin.h.

                                                                                     {
    switch (origin) {
        case     kTopLeft_SkEncodedOrigin: return SkMatrix::I();
        case    kTopRight_SkEncodedOrigin: return SkMatrix::MakeAll(-1,  0, w,  0,  1, 0, 0, 0, 1);
        case kBottomRight_SkEncodedOrigin: return SkMatrix::MakeAll(-1,  0, w,  0, -1, h, 0, 0, 1);
        case  kBottomLeft_SkEncodedOrigin: return SkMatrix::MakeAll( 1,  0, 0,  0, -1, h, 0, 0, 1);
        case     kLeftTop_SkEncodedOrigin: return SkMatrix::MakeAll( 0,  1, 0,  1,  0, 0, 0, 0, 1);
        case    kRightTop_SkEncodedOrigin: return SkMatrix::MakeAll( 0, -1, w,  1,  0, 0, 0, 0, 1);
        case kRightBottom_SkEncodedOrigin: return SkMatrix::MakeAll( 0, -1, w, -1,  0, h, 0, 0, 1);
        case  kLeftBottom_SkEncodedOrigin: return SkMatrix::MakeAll( 0,  1, 0, -1,  0, h, 0, 0, 1);
    }
    SK_ABORT("Unexpected origin");
}