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/* Copyright 2009-2015 Yorba Foundation
*
* This software is licensed under the GNU LGPL (version 2.1 or later).
* See the COPYING file in this distribution.
*/
public enum Orientation {
MIN = 1,
TOP_LEFT = 1,
TOP_RIGHT = 2,
BOTTOM_RIGHT = 3,
BOTTOM_LEFT = 4,
LEFT_TOP = 5,
RIGHT_TOP = 6,
RIGHT_BOTTOM = 7,
LEFT_BOTTOM = 8,
MAX = 8;
public string to_string() {
switch (this) {
case TOP_LEFT:
return "top-left";
case TOP_RIGHT:
return "top-right";
case BOTTOM_RIGHT:
return "bottom-right";
case BOTTOM_LEFT:
return "bottom-left";
case LEFT_TOP:
return "left-top";
case RIGHT_TOP:
return "right-top";
case RIGHT_BOTTOM:
return "right-bottom";
case LEFT_BOTTOM:
return "left-bottom";
default:
return "unknown orientation %d".printf((int) this);
}
}
public Orientation rotate_clockwise() {
switch (this) {
case TOP_LEFT:
return RIGHT_TOP;
case TOP_RIGHT:
return RIGHT_BOTTOM;
case BOTTOM_RIGHT:
return LEFT_BOTTOM;
case BOTTOM_LEFT:
return LEFT_TOP;
case LEFT_TOP:
return TOP_RIGHT;
case RIGHT_TOP:
return BOTTOM_RIGHT;
case RIGHT_BOTTOM:
return BOTTOM_LEFT;
case LEFT_BOTTOM:
return TOP_LEFT;
default:
error("rotate_clockwise: %d", this);
}
}
public Orientation rotate_counterclockwise() {
switch (this) {
case TOP_LEFT:
return LEFT_BOTTOM;
case TOP_RIGHT:
return LEFT_TOP;
case BOTTOM_RIGHT:
return RIGHT_TOP;
case BOTTOM_LEFT:
return RIGHT_BOTTOM;
case LEFT_TOP:
return BOTTOM_LEFT;
case RIGHT_TOP:
return TOP_LEFT;
case RIGHT_BOTTOM:
return TOP_RIGHT;
case LEFT_BOTTOM:
return BOTTOM_RIGHT;
default:
error("rotate_counterclockwise: %d", this);
}
}
public Orientation flip_top_to_bottom() {
switch (this) {
case TOP_LEFT:
return BOTTOM_LEFT;
case TOP_RIGHT:
return BOTTOM_RIGHT;
case BOTTOM_RIGHT:
return TOP_RIGHT;
case BOTTOM_LEFT:
return TOP_LEFT;
case LEFT_TOP:
return LEFT_BOTTOM;
case RIGHT_TOP:
return RIGHT_BOTTOM;
case RIGHT_BOTTOM:
return RIGHT_TOP;
case LEFT_BOTTOM:
return LEFT_TOP;
default:
error("flip_top_to_bottom: %d", this);
}
}
public Orientation flip_left_to_right() {
switch (this) {
case TOP_LEFT:
return TOP_RIGHT;
case TOP_RIGHT:
return TOP_LEFT;
case BOTTOM_RIGHT:
return BOTTOM_LEFT;
case BOTTOM_LEFT:
return BOTTOM_RIGHT;
case LEFT_TOP:
return RIGHT_TOP;
case RIGHT_TOP:
return LEFT_TOP;
case RIGHT_BOTTOM:
return LEFT_BOTTOM;
case LEFT_BOTTOM:
return RIGHT_BOTTOM;
default:
error("flip_left_to_right: %d", this);
}
}
public Orientation perform(Rotation rotation) {
switch (rotation) {
case Rotation.CLOCKWISE:
return rotate_clockwise();
case Rotation.COUNTERCLOCKWISE:
return rotate_counterclockwise();
case Rotation.MIRROR:
return flip_left_to_right();
case Rotation.UPSIDE_DOWN:
return flip_top_to_bottom();
default:
error("perform: %d", (int) rotation);
}
}
public Rotation[] to_rotations() {
switch (this) {
case TOP_LEFT:
// identity orientation
return { };
case TOP_RIGHT:
return { Rotation.MIRROR };
case BOTTOM_RIGHT:
return { Rotation.UPSIDE_DOWN };
case BOTTOM_LEFT:
// flip top-to-bottom
return { Rotation.MIRROR, Rotation.UPSIDE_DOWN };
case LEFT_TOP:
return { Rotation.COUNTERCLOCKWISE, Rotation.UPSIDE_DOWN };
case RIGHT_TOP:
return { Rotation.CLOCKWISE };
case RIGHT_BOTTOM:
return { Rotation.CLOCKWISE, Rotation.UPSIDE_DOWN };
case LEFT_BOTTOM:
return { Rotation.COUNTERCLOCKWISE };
default:
error("to_rotations: %d", this);
}
}
public Dimensions rotate_dimensions(Dimensions dim) {
switch (this) {
case Orientation.TOP_LEFT:
case Orientation.TOP_RIGHT:
case Orientation.BOTTOM_RIGHT:
case Orientation.BOTTOM_LEFT:
// fine just as it is
return dim;
case Orientation.LEFT_TOP:
case Orientation.RIGHT_TOP:
case Orientation.RIGHT_BOTTOM:
case Orientation.LEFT_BOTTOM:
// swap
return Dimensions(dim.height, dim.width);
default:
error("rotate_dimensions: %d", this);
}
}
public Dimensions derotate_dimensions(Dimensions dim) {
return rotate_dimensions(dim);
}
public Gdk.Pixbuf rotate_pixbuf(Gdk.Pixbuf pixbuf) {
Gdk.Pixbuf rotated;
switch (this) {
case TOP_LEFT:
// fine just as it is
rotated = pixbuf;
break;
case TOP_RIGHT:
// mirror
rotated = pixbuf.flip(true);
break;
case BOTTOM_RIGHT:
rotated = pixbuf.rotate_simple(Gdk.PixbufRotation.UPSIDEDOWN);
break;
case BOTTOM_LEFT:
// flip top-to-bottom
rotated = pixbuf.flip(false);
break;
case LEFT_TOP:
rotated = pixbuf.rotate_simple(Gdk.PixbufRotation.COUNTERCLOCKWISE).flip(false);
break;
case RIGHT_TOP:
rotated = pixbuf.rotate_simple(Gdk.PixbufRotation.CLOCKWISE);
break;
case RIGHT_BOTTOM:
rotated = pixbuf.rotate_simple(Gdk.PixbufRotation.CLOCKWISE).flip(false);
break;
case LEFT_BOTTOM:
rotated = pixbuf.rotate_simple(Gdk.PixbufRotation.COUNTERCLOCKWISE);
break;
default:
error("rotate_pixbuf: %d", this);
}
return rotated;
}
// space is the unrotated dimensions the point is rotating with
public Gdk.Point rotate_point(Dimensions space, Gdk.Point point) {
assert(space.has_area());
assert(point.x >= 0);
assert(point.x < space.width);
assert(point.y >= 0);
assert(point.y < space.height);
Gdk.Point rotated = Gdk.Point();
switch (this) {
case TOP_LEFT:
// fine as-is
rotated = point;
break;
case TOP_RIGHT:
// mirror
rotated.x = space.width - point.x - 1;
rotated.y = point.y;
break;
case BOTTOM_RIGHT:
// rotate 180
rotated.x = space.width - point.x - 1;
rotated.y = space.height - point.y - 1;
break;
case BOTTOM_LEFT:
// flip top-to-bottom
rotated.x = point.x;
rotated.y = space.height - point.y - 1;
break;
case LEFT_TOP:
// rotate 90, flip top-to-bottom
rotated.x = point.y;
rotated.y = point.x;
break;
case RIGHT_TOP:
// rotate 270
rotated.x = space.height - point.y - 1;
rotated.y = point.x;
break;
case RIGHT_BOTTOM:
// rotate 270, flip top-to-bottom
rotated.x = space.height - point.y - 1;
rotated.y = space.width - point.x - 1;
break;
case LEFT_BOTTOM:
// rotate 90
rotated.x = point.y;
rotated.y = space.width - point.x - 1;
break;
default:
error("rotate_point: %d", this);
}
return rotated;
}
// space is the unrotated dimensions the point is return to
public Gdk.Point derotate_point(Dimensions space, Gdk.Point point) {
assert(space.has_area());
Gdk.Point derotated = Gdk.Point();
switch (this) {
case TOP_LEFT:
// fine as-is
derotated = point;
break;
case TOP_RIGHT:
// mirror
derotated.x = space.width - point.x - 1;
derotated.y = point.y;
break;
case BOTTOM_RIGHT:
// rotate 180
derotated.x = space.width - point.x - 1;
derotated.y = space.height - point.y - 1;
break;
case BOTTOM_LEFT:
// flip top-to-bottom
derotated.x = point.x;
derotated.y = space.height - point.y - 1;
break;
case LEFT_TOP:
// rotate 90, flip top-to-bottom
derotated.x = point.y;
derotated.y = point.x;
break;
case RIGHT_TOP:
// rotate 270
derotated.x = point.y;
derotated.y = space.height - point.x - 1;
break;
case RIGHT_BOTTOM:
// rotate 270, flip top-to-bottom
derotated.x = space.width - point.y - 1;
derotated.y = space.height - point.x - 1;
break;
case LEFT_BOTTOM:
// rotate 90
derotated.x = space.width - point.y - 1;
derotated.y = point.x;
break;
default:
error("rotate_point: %d", this);
}
return derotated;
}
// space is the unrotated dimensions the point is rotating with
public Box rotate_box(Dimensions space, Box box) {
Gdk.Point top_left, bottom_right;
box.get_points(out top_left, out bottom_right);
top_left.x = top_left.x.clamp(0, space.width - 1);
top_left.y = top_left.y.clamp(0, space.height - 1);
bottom_right.x = bottom_right.x.clamp(0, space.width - 1);
bottom_right.y = bottom_right.y.clamp(0, space.height - 1);
top_left = rotate_point(space, top_left);
bottom_right = rotate_point(space, bottom_right);
return Box.from_points(top_left, bottom_right);
}
// space is the unrotated dimensions the point is return to
public Box derotate_box(Dimensions space, Box box) {
Gdk.Point top_left, bottom_right;
box.get_points(out top_left, out bottom_right);
top_left = derotate_point(space, top_left);
bottom_right = derotate_point(space, bottom_right);
return Box.from_points(top_left, bottom_right);
}
}
public enum Rotation {
CLOCKWISE,
COUNTERCLOCKWISE,
MIRROR,
UPSIDE_DOWN;
public Gdk.Pixbuf perform(Gdk.Pixbuf pixbuf) {
switch (this) {
case CLOCKWISE:
return pixbuf.rotate_simple(Gdk.PixbufRotation.CLOCKWISE);
case COUNTERCLOCKWISE:
return pixbuf.rotate_simple(Gdk.PixbufRotation.COUNTERCLOCKWISE);
case MIRROR:
return pixbuf.flip(true);
case UPSIDE_DOWN:
return pixbuf.flip(false);
default:
error("Unknown rotation: %d", (int) this);
}
}
public Rotation opposite() {
switch (this) {
case CLOCKWISE:
return COUNTERCLOCKWISE;
case COUNTERCLOCKWISE:
return CLOCKWISE;
case MIRROR:
case UPSIDE_DOWN:
return this;
default:
error("Unknown rotation: %d", (int) this);
}
}
}
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