gfx::Transform Class Reference

#include <transform.h>

Public Member Functions
	Transform ()
	Transform (float col1row1, float col2row1, float col3row1, float col4row1, float col1row2, float col2row2, float col3row2, float col4row2, float col1row3, float col2row3, float col3row3, float col4row3, float col1row4, float col2row4, float col3row4, float col4row4)
	Transform (float col1row1, float col2row1, float col1row2, float col2row2, float x_translation, float y_translation)
bool	operator== (const Transform &rhs) const
bool	operator!= (const Transform &rhs) const
float	operator[] (int index) const
bool	IsIdentity () const
void	Scale (float x, float y)
void	TransformRect (RectF *rect) const
void	TransformPoint (PointF *point) const
std::string	ToString () const

Detailed Description

Definition at line 20 of file transform.h.

Constructor & Destructor Documentation

Transform() [1/3]

gfx::Transform::Transform

(

)

Definition at line 11 of file transform.cc.

    : matrix_{1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1},
      is_identity_(true) {}

Transform() [2/3]

gfx::Transform::Transform	(	float	col1row1,
		float	col2row1,
		float	col3row1,
		float	col4row1,
		float	col1row2,
		float	col2row2,
		float	col3row2,
		float	col4row2,
		float	col1row3,
		float	col2row3,
		float	col3row3,
		float	col4row3,
		float	col1row4,
		float	col2row4,
		float	col3row4,
		float	col4row4
	)

Definition at line 15 of file transform.cc.

    : matrix_{col1row1, col2row1, col3row1, col4row1, col1row2, col2row2,
              col3row2, col4row2, col1row3, col2row3, col3row3, col4row3,
              col4row4, col2row4, col3row4, col4row4} {
  UpdateIdentity();
}

Transform() [3/3]

gfx::Transform::Transform	(	float	col1row1,
		float	col2row1,
		float	col1row2,
		float	col2row2,
		float	x_translation,
		float	y_translation
	)

Definition at line 37 of file transform.cc.

    : matrix_{col1row1,
              col2row1,
              x_translation,
              0,
              col1row2,
              col2row2,
              y_translation,
              0,
              0,
              0,
              1,
              0,
              0,
              0,
              0,
              1} {
  UpdateIdentity();
}

Member Function Documentation

IsIdentity()

bool gfx::Transform::IsIdentity

(

)

const

Definition at line 72 of file transform.cc.

                                 {
  return is_identity_;
}

operator!=()

bool gfx::Transform::operator!= ( const Transform &  rhs ) const

inline

Definition at line 51 of file transform.h.

{ return !(*this == rhs); };

operator==()

bool gfx::Transform::operator==

(

const Transform &

rhs

)

const

Definition at line 62 of file transform.cc.

                                                     {
  return matrix_[0] == rhs[0] && matrix_[1] == rhs[1] && matrix_[2] == rhs[2] &&
         matrix_[3] == rhs[3] && matrix_[4] == rhs[4] && matrix_[5] == rhs[5] &&
         matrix_[6] == rhs[6] && matrix_[7] == rhs[7] && matrix_[8] == rhs[8] &&
         matrix_[9] == rhs[9] && matrix_[10] == rhs[10] &&
         matrix_[11] == rhs[11] && matrix_[12] == rhs[12] &&
         matrix_[13] == rhs[13] && matrix_[14] == rhs[14] &&
         matrix_[15] == rhs[15];
}

operator[]()

float gfx::Transform::operator[] ( int  index ) const

inline

Definition at line 53 of file transform.h.

                                    {
    BASE_DCHECK((unsigned)index < 16);
    return matrix_[index];
  }

Scale()

void gfx::Transform::Scale	(	float	x,
		float	y
	)

Definition at line 87 of file transform.cc.

                                      {
  matrix_[0] *= x;
  matrix_[5] *= y;
  UpdateIdentity();
}

ToString()

std::string gfx::Transform::ToString

(

)

const

Definition at line 76 of file transform.cc.

                                    {
  return base::StringPrintf(
      "[ %+0.4f %+0.4f %+0.4f %+0.4f  \n"
      "  %+0.4f %+0.4f %+0.4f %+0.4f  \n"
      "  %+0.4f %+0.4f %+0.4f %+0.4f  \n"
      "  %+0.4f %+0.4f %+0.4f %+0.4f ]\n",
      matrix_[0], matrix_[1], matrix_[2], matrix_[3], matrix_[4], matrix_[5],
      matrix_[6], matrix_[7], matrix_[8], matrix_[9], matrix_[10], matrix_[11],
      matrix_[12], matrix_[13], matrix_[14], matrix_[15]);
}

TransformPoint()

void gfx::Transform::TransformPoint

(

PointF *

point

)

const

Definition at line 107 of file transform.cc.

                                                  {
  if (IsIdentity())
    return;
  float x = point->x();
  float y = point->y();
  point->SetPoint(x * matrix_[0] + y * matrix_[1] + matrix_[2],
                  x * matrix_[4] + y * matrix_[5] + matrix_[6]);
  return;
}

TransformRect()

void gfx::Transform::TransformRect

(

RectF *

rect

)

const

Definition at line 93 of file transform.cc.

                                               {
  if (IsIdentity())
    return;
  PointF origin = rect->origin();
  PointF top_right = rect->top_right();
  PointF bottom_left = rect->bottom_left();
  TransformPoint(&origin);
  TransformPoint(&top_right);
  TransformPoint(&bottom_left);
  rect->set_origin(origin);
  rect->set_width(top_right.x() - origin.x());
  rect->set_height(bottom_left.y() - origin.y());
}

---

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

• third_party/accessibility/gfx/transform.h
• third_party/accessibility/gfx/transform.cc