| /* |
| * Copyright (C) 2006 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.graphics; |
| |
| import android.view.HardwareRenderer; |
| |
| /** |
| * The Path class encapsulates compound (multiple contour) geometric paths |
| * consisting of straight line segments, quadratic curves, and cubic curves. |
| * It can be drawn with canvas.drawPath(path, paint), either filled or stroked |
| * (based on the paint's Style), or it can be used for clipping or to draw |
| * text on a path. |
| */ |
| public class Path { |
| /** |
| * @hide |
| */ |
| public final int mNativePath; |
| |
| /** |
| * @hide |
| */ |
| public boolean isSimplePath = true; |
| /** |
| * @hide |
| */ |
| public Region rects; |
| private boolean mDetectSimplePaths; |
| private Direction mLastDirection = null; |
| |
| /** |
| * Create an empty path |
| */ |
| public Path() { |
| mNativePath = init1(); |
| mDetectSimplePaths = HardwareRenderer.isAvailable(); |
| } |
| |
| /** |
| * Create a new path, copying the contents from the src path. |
| * |
| * @param src The path to copy from when initializing the new path |
| */ |
| public Path(Path src) { |
| int valNative = 0; |
| if (src != null) { |
| valNative = src.mNativePath; |
| } |
| mNativePath = init2(valNative); |
| mDetectSimplePaths = HardwareRenderer.isAvailable(); |
| } |
| |
| /** |
| * Clear any lines and curves from the path, making it empty. |
| * This does NOT change the fill-type setting. |
| */ |
| public void reset() { |
| isSimplePath = true; |
| if (mDetectSimplePaths) { |
| mLastDirection = null; |
| if (rects != null) rects.setEmpty(); |
| } |
| native_reset(mNativePath); |
| } |
| |
| /** |
| * Rewinds the path: clears any lines and curves from the path but |
| * keeps the internal data structure for faster reuse. |
| */ |
| public void rewind() { |
| isSimplePath = true; |
| if (mDetectSimplePaths) { |
| mLastDirection = null; |
| if (rects != null) rects.setEmpty(); |
| } |
| native_rewind(mNativePath); |
| } |
| |
| /** Replace the contents of this with the contents of src. |
| */ |
| public void set(Path src) { |
| if (this != src) { |
| isSimplePath = src.isSimplePath; |
| native_set(mNativePath, src.mNativePath); |
| } |
| } |
| |
| /** Enum for the ways a path may be filled |
| */ |
| public enum FillType { |
| // these must match the values in SkPath.h |
| WINDING (0), |
| EVEN_ODD (1), |
| INVERSE_WINDING (2), |
| INVERSE_EVEN_ODD(3); |
| |
| FillType(int ni) { |
| nativeInt = ni; |
| } |
| final int nativeInt; |
| } |
| |
| // these must be in the same order as their native values |
| private static final FillType[] sFillTypeArray = { |
| FillType.WINDING, |
| FillType.EVEN_ODD, |
| FillType.INVERSE_WINDING, |
| FillType.INVERSE_EVEN_ODD |
| }; |
| |
| /** |
| * Return the path's fill type. This defines how "inside" is |
| * computed. The default value is WINDING. |
| * |
| * @return the path's fill type |
| */ |
| public FillType getFillType() { |
| return sFillTypeArray[native_getFillType(mNativePath)]; |
| } |
| |
| /** |
| * Set the path's fill type. This defines how "inside" is computed. |
| * |
| * @param ft The new fill type for this path |
| */ |
| public void setFillType(FillType ft) { |
| native_setFillType(mNativePath, ft.nativeInt); |
| } |
| |
| /** |
| * Returns true if the filltype is one of the INVERSE variants |
| * |
| * @return true if the filltype is one of the INVERSE variants |
| */ |
| public boolean isInverseFillType() { |
| final int ft = native_getFillType(mNativePath); |
| return (ft & 2) != 0; |
| } |
| |
| /** |
| * Toggles the INVERSE state of the filltype |
| */ |
| public void toggleInverseFillType() { |
| int ft = native_getFillType(mNativePath); |
| ft ^= 2; |
| native_setFillType(mNativePath, ft); |
| } |
| |
| /** |
| * Returns true if the path is empty (contains no lines or curves) |
| * |
| * @return true if the path is empty (contains no lines or curves) |
| */ |
| public boolean isEmpty() { |
| return native_isEmpty(mNativePath); |
| } |
| |
| /** |
| * Returns true if the path specifies a rectangle. If so, and if rect is |
| * not null, set rect to the bounds of the path. If the path does not |
| * specify a rectangle, return false and ignore rect. |
| * |
| * @param rect If not null, returns the bounds of the path if it specifies |
| * a rectangle |
| * @return true if the path specifies a rectangle |
| */ |
| public boolean isRect(RectF rect) { |
| return native_isRect(mNativePath, rect); |
| } |
| |
| /** |
| * Compute the bounds of the control points of the path, and write the |
| * answer into bounds. If the path contains 0 or 1 points, the bounds is |
| * set to (0,0,0,0) |
| * |
| * @param bounds Returns the computed bounds of the path's control points. |
| * @param exact This parameter is no longer used. |
| */ |
| @SuppressWarnings({"UnusedDeclaration"}) |
| public void computeBounds(RectF bounds, boolean exact) { |
| native_computeBounds(mNativePath, bounds); |
| } |
| |
| /** |
| * Hint to the path to prepare for adding more points. This can allow the |
| * path to more efficiently allocate its storage. |
| * |
| * @param extraPtCount The number of extra points that may be added to this |
| * path |
| */ |
| public void incReserve(int extraPtCount) { |
| native_incReserve(mNativePath, extraPtCount); |
| } |
| |
| /** |
| * Set the beginning of the next contour to the point (x,y). |
| * |
| * @param x The x-coordinate of the start of a new contour |
| * @param y The y-coordinate of the start of a new contour |
| */ |
| public void moveTo(float x, float y) { |
| native_moveTo(mNativePath, x, y); |
| } |
| |
| /** |
| * Set the beginning of the next contour relative to the last point on the |
| * previous contour. If there is no previous contour, this is treated the |
| * same as moveTo(). |
| * |
| * @param dx The amount to add to the x-coordinate of the end of the |
| * previous contour, to specify the start of a new contour |
| * @param dy The amount to add to the y-coordinate of the end of the |
| * previous contour, to specify the start of a new contour |
| */ |
| public void rMoveTo(float dx, float dy) { |
| native_rMoveTo(mNativePath, dx, dy); |
| } |
| |
| /** |
| * Add a line from the last point to the specified point (x,y). |
| * If no moveTo() call has been made for this contour, the first point is |
| * automatically set to (0,0). |
| * |
| * @param x The x-coordinate of the end of a line |
| * @param y The y-coordinate of the end of a line |
| */ |
| public void lineTo(float x, float y) { |
| isSimplePath = false; |
| native_lineTo(mNativePath, x, y); |
| } |
| |
| /** |
| * Same as lineTo, but the coordinates are considered relative to the last |
| * point on this contour. If there is no previous point, then a moveTo(0,0) |
| * is inserted automatically. |
| * |
| * @param dx The amount to add to the x-coordinate of the previous point on |
| * this contour, to specify a line |
| * @param dy The amount to add to the y-coordinate of the previous point on |
| * this contour, to specify a line |
| */ |
| public void rLineTo(float dx, float dy) { |
| isSimplePath = false; |
| native_rLineTo(mNativePath, dx, dy); |
| } |
| |
| /** |
| * Add a quadratic bezier from the last point, approaching control point |
| * (x1,y1), and ending at (x2,y2). If no moveTo() call has been made for |
| * this contour, the first point is automatically set to (0,0). |
| * |
| * @param x1 The x-coordinate of the control point on a quadratic curve |
| * @param y1 The y-coordinate of the control point on a quadratic curve |
| * @param x2 The x-coordinate of the end point on a quadratic curve |
| * @param y2 The y-coordinate of the end point on a quadratic curve |
| */ |
| public void quadTo(float x1, float y1, float x2, float y2) { |
| isSimplePath = false; |
| native_quadTo(mNativePath, x1, y1, x2, y2); |
| } |
| |
| /** |
| * Same as quadTo, but the coordinates are considered relative to the last |
| * point on this contour. If there is no previous point, then a moveTo(0,0) |
| * is inserted automatically. |
| * |
| * @param dx1 The amount to add to the x-coordinate of the last point on |
| * this contour, for the control point of a quadratic curve |
| * @param dy1 The amount to add to the y-coordinate of the last point on |
| * this contour, for the control point of a quadratic curve |
| * @param dx2 The amount to add to the x-coordinate of the last point on |
| * this contour, for the end point of a quadratic curve |
| * @param dy2 The amount to add to the y-coordinate of the last point on |
| * this contour, for the end point of a quadratic curve |
| */ |
| public void rQuadTo(float dx1, float dy1, float dx2, float dy2) { |
| isSimplePath = false; |
| native_rQuadTo(mNativePath, dx1, dy1, dx2, dy2); |
| } |
| |
| /** |
| * Add a cubic bezier from the last point, approaching control points |
| * (x1,y1) and (x2,y2), and ending at (x3,y3). If no moveTo() call has been |
| * made for this contour, the first point is automatically set to (0,0). |
| * |
| * @param x1 The x-coordinate of the 1st control point on a cubic curve |
| * @param y1 The y-coordinate of the 1st control point on a cubic curve |
| * @param x2 The x-coordinate of the 2nd control point on a cubic curve |
| * @param y2 The y-coordinate of the 2nd control point on a cubic curve |
| * @param x3 The x-coordinate of the end point on a cubic curve |
| * @param y3 The y-coordinate of the end point on a cubic curve |
| */ |
| public void cubicTo(float x1, float y1, float x2, float y2, |
| float x3, float y3) { |
| isSimplePath = false; |
| native_cubicTo(mNativePath, x1, y1, x2, y2, x3, y3); |
| } |
| |
| /** |
| * Same as cubicTo, but the coordinates are considered relative to the |
| * current point on this contour. If there is no previous point, then a |
| * moveTo(0,0) is inserted automatically. |
| */ |
| public void rCubicTo(float x1, float y1, float x2, float y2, |
| float x3, float y3) { |
| isSimplePath = false; |
| native_rCubicTo(mNativePath, x1, y1, x2, y2, x3, y3); |
| } |
| |
| /** |
| * Append the specified arc to the path as a new contour. If the start of |
| * the path is different from the path's current last point, then an |
| * automatic lineTo() is added to connect the current contour to the |
| * start of the arc. However, if the path is empty, then we call moveTo() |
| * with the first point of the arc. The sweep angle is tread mod 360. |
| * |
| * @param oval The bounds of oval defining shape and size of the arc |
| * @param startAngle Starting angle (in degrees) where the arc begins |
| * @param sweepAngle Sweep angle (in degrees) measured clockwise, treated |
| * mod 360. |
| * @param forceMoveTo If true, always begin a new contour with the arc |
| */ |
| public void arcTo(RectF oval, float startAngle, float sweepAngle, |
| boolean forceMoveTo) { |
| isSimplePath = false; |
| native_arcTo(mNativePath, oval, startAngle, sweepAngle, forceMoveTo); |
| } |
| |
| /** |
| * Append the specified arc to the path as a new contour. If the start of |
| * the path is different from the path's current last point, then an |
| * automatic lineTo() is added to connect the current contour to the |
| * start of the arc. However, if the path is empty, then we call moveTo() |
| * with the first point of the arc. |
| * |
| * @param oval The bounds of oval defining shape and size of the arc |
| * @param startAngle Starting angle (in degrees) where the arc begins |
| * @param sweepAngle Sweep angle (in degrees) measured clockwise |
| */ |
| public void arcTo(RectF oval, float startAngle, float sweepAngle) { |
| isSimplePath = false; |
| native_arcTo(mNativePath, oval, startAngle, sweepAngle, false); |
| } |
| |
| /** |
| * Close the current contour. If the current point is not equal to the |
| * first point of the contour, a line segment is automatically added. |
| */ |
| public void close() { |
| isSimplePath = false; |
| native_close(mNativePath); |
| } |
| |
| /** |
| * Specifies how closed shapes (e.g. rects, ovals) are oriented when they |
| * are added to a path. |
| */ |
| public enum Direction { |
| /** clockwise */ |
| CW (0), // must match enum in SkPath.h |
| /** counter-clockwise */ |
| CCW (1); // must match enum in SkPath.h |
| |
| Direction(int ni) { |
| nativeInt = ni; |
| } |
| final int nativeInt; |
| } |
| |
| private void detectSimplePath(float left, float top, float right, float bottom, Direction dir) { |
| if (mDetectSimplePaths) { |
| if (mLastDirection == null) { |
| mLastDirection = dir; |
| } |
| if (mLastDirection != dir) { |
| isSimplePath = false; |
| } else { |
| if (rects == null) rects = new Region(); |
| rects.op((int) left, (int) top, (int) right, (int) bottom, Region.Op.UNION); |
| } |
| } |
| } |
| |
| /** |
| * Add a closed rectangle contour to the path |
| * |
| * @param rect The rectangle to add as a closed contour to the path |
| * @param dir The direction to wind the rectangle's contour |
| */ |
| public void addRect(RectF rect, Direction dir) { |
| if (rect == null) { |
| throw new NullPointerException("need rect parameter"); |
| } |
| detectSimplePath(rect.left, rect.top, rect.right, rect.bottom, dir); |
| native_addRect(mNativePath, rect, dir.nativeInt); |
| } |
| |
| /** |
| * Add a closed rectangle contour to the path |
| * |
| * @param left The left side of a rectangle to add to the path |
| * @param top The top of a rectangle to add to the path |
| * @param right The right side of a rectangle to add to the path |
| * @param bottom The bottom of a rectangle to add to the path |
| * @param dir The direction to wind the rectangle's contour |
| */ |
| public void addRect(float left, float top, float right, float bottom, Direction dir) { |
| detectSimplePath(left, top, right, bottom, dir); |
| native_addRect(mNativePath, left, top, right, bottom, dir.nativeInt); |
| } |
| |
| /** |
| * Add a closed oval contour to the path |
| * |
| * @param oval The bounds of the oval to add as a closed contour to the path |
| * @param dir The direction to wind the oval's contour |
| */ |
| public void addOval(RectF oval, Direction dir) { |
| if (oval == null) { |
| throw new NullPointerException("need oval parameter"); |
| } |
| isSimplePath = false; |
| native_addOval(mNativePath, oval, dir.nativeInt); |
| } |
| |
| /** |
| * Add a closed circle contour to the path |
| * |
| * @param x The x-coordinate of the center of a circle to add to the path |
| * @param y The y-coordinate of the center of a circle to add to the path |
| * @param radius The radius of a circle to add to the path |
| * @param dir The direction to wind the circle's contour |
| */ |
| public void addCircle(float x, float y, float radius, Direction dir) { |
| isSimplePath = false; |
| native_addCircle(mNativePath, x, y, radius, dir.nativeInt); |
| } |
| |
| /** |
| * Add the specified arc to the path as a new contour. |
| * |
| * @param oval The bounds of oval defining the shape and size of the arc |
| * @param startAngle Starting angle (in degrees) where the arc begins |
| * @param sweepAngle Sweep angle (in degrees) measured clockwise |
| */ |
| public void addArc(RectF oval, float startAngle, float sweepAngle) { |
| if (oval == null) { |
| throw new NullPointerException("need oval parameter"); |
| } |
| isSimplePath = false; |
| native_addArc(mNativePath, oval, startAngle, sweepAngle); |
| } |
| |
| /** |
| * Add a closed round-rectangle contour to the path |
| * |
| * @param rect The bounds of a round-rectangle to add to the path |
| * @param rx The x-radius of the rounded corners on the round-rectangle |
| * @param ry The y-radius of the rounded corners on the round-rectangle |
| * @param dir The direction to wind the round-rectangle's contour |
| */ |
| public void addRoundRect(RectF rect, float rx, float ry, Direction dir) { |
| if (rect == null) { |
| throw new NullPointerException("need rect parameter"); |
| } |
| isSimplePath = false; |
| native_addRoundRect(mNativePath, rect, rx, ry, dir.nativeInt); |
| } |
| |
| /** |
| * Add a closed round-rectangle contour to the path. Each corner receives |
| * two radius values [X, Y]. The corners are ordered top-left, top-right, |
| * bottom-right, bottom-left |
| * |
| * @param rect The bounds of a round-rectangle to add to the path |
| * @param radii Array of 8 values, 4 pairs of [X,Y] radii |
| * @param dir The direction to wind the round-rectangle's contour |
| */ |
| public void addRoundRect(RectF rect, float[] radii, Direction dir) { |
| if (rect == null) { |
| throw new NullPointerException("need rect parameter"); |
| } |
| if (radii.length < 8) { |
| throw new ArrayIndexOutOfBoundsException("radii[] needs 8 values"); |
| } |
| isSimplePath = false; |
| native_addRoundRect(mNativePath, rect, radii, dir.nativeInt); |
| } |
| |
| /** |
| * Add a copy of src to the path, offset by (dx,dy) |
| * |
| * @param src The path to add as a new contour |
| * @param dx The amount to translate the path in X as it is added |
| */ |
| public void addPath(Path src, float dx, float dy) { |
| isSimplePath = false; |
| native_addPath(mNativePath, src.mNativePath, dx, dy); |
| } |
| |
| /** |
| * Add a copy of src to the path |
| * |
| * @param src The path that is appended to the current path |
| */ |
| public void addPath(Path src) { |
| isSimplePath = false; |
| native_addPath(mNativePath, src.mNativePath); |
| } |
| |
| /** |
| * Add a copy of src to the path, transformed by matrix |
| * |
| * @param src The path to add as a new contour |
| */ |
| public void addPath(Path src, Matrix matrix) { |
| if (!src.isSimplePath) isSimplePath = false; |
| native_addPath(mNativePath, src.mNativePath, matrix.native_instance); |
| } |
| |
| /** |
| * Offset the path by (dx,dy), returning true on success |
| * |
| * @param dx The amount in the X direction to offset the entire path |
| * @param dy The amount in the Y direction to offset the entire path |
| * @param dst The translated path is written here. If this is null, then |
| * the original path is modified. |
| */ |
| public void offset(float dx, float dy, Path dst) { |
| int dstNative = 0; |
| if (dst != null) { |
| dstNative = dst.mNativePath; |
| } |
| native_offset(mNativePath, dx, dy, dstNative); |
| } |
| |
| /** |
| * Offset the path by (dx,dy), returning true on success |
| * |
| * @param dx The amount in the X direction to offset the entire path |
| * @param dy The amount in the Y direction to offset the entire path |
| */ |
| public void offset(float dx, float dy) { |
| native_offset(mNativePath, dx, dy); |
| } |
| |
| /** |
| * Sets the last point of the path. |
| * |
| * @param dx The new X coordinate for the last point |
| * @param dy The new Y coordinate for the last point |
| */ |
| public void setLastPoint(float dx, float dy) { |
| isSimplePath = false; |
| native_setLastPoint(mNativePath, dx, dy); |
| } |
| |
| /** |
| * Transform the points in this path by matrix, and write the answer |
| * into dst. If dst is null, then the the original path is modified. |
| * |
| * @param matrix The matrix to apply to the path |
| * @param dst The transformed path is written here. If dst is null, |
| * then the the original path is modified |
| */ |
| public void transform(Matrix matrix, Path dst) { |
| int dstNative = 0; |
| if (dst != null) { |
| dstNative = dst.mNativePath; |
| } |
| native_transform(mNativePath, matrix.native_instance, dstNative); |
| } |
| |
| /** |
| * Transform the points in this path by matrix. |
| * |
| * @param matrix The matrix to apply to the path |
| */ |
| public void transform(Matrix matrix) { |
| native_transform(mNativePath, matrix.native_instance); |
| } |
| |
| protected void finalize() throws Throwable { |
| try { |
| finalizer(mNativePath); |
| } finally { |
| super.finalize(); |
| } |
| } |
| |
| final int ni() { |
| return mNativePath; |
| } |
| |
| private static native int init1(); |
| private static native int init2(int nPath); |
| private static native void native_reset(int nPath); |
| private static native void native_rewind(int nPath); |
| private static native void native_set(int native_dst, int native_src); |
| private static native int native_getFillType(int nPath); |
| private static native void native_setFillType(int nPath, int ft); |
| private static native boolean native_isEmpty(int nPath); |
| private static native boolean native_isRect(int nPath, RectF rect); |
| private static native void native_computeBounds(int nPath, RectF bounds); |
| private static native void native_incReserve(int nPath, int extraPtCount); |
| private static native void native_moveTo(int nPath, float x, float y); |
| private static native void native_rMoveTo(int nPath, float dx, float dy); |
| private static native void native_lineTo(int nPath, float x, float y); |
| private static native void native_rLineTo(int nPath, float dx, float dy); |
| private static native void native_quadTo(int nPath, float x1, float y1, |
| float x2, float y2); |
| private static native void native_rQuadTo(int nPath, float dx1, float dy1, |
| float dx2, float dy2); |
| private static native void native_cubicTo(int nPath, float x1, float y1, |
| float x2, float y2, float x3, float y3); |
| private static native void native_rCubicTo(int nPath, float x1, float y1, |
| float x2, float y2, float x3, float y3); |
| private static native void native_arcTo(int nPath, RectF oval, |
| float startAngle, float sweepAngle, boolean forceMoveTo); |
| private static native void native_close(int nPath); |
| private static native void native_addRect(int nPath, RectF rect, int dir); |
| private static native void native_addRect(int nPath, float left, float top, |
| float right, float bottom, int dir); |
| private static native void native_addOval(int nPath, RectF oval, int dir); |
| private static native void native_addCircle(int nPath, float x, float y, |
| float radius, int dir); |
| private static native void native_addArc(int nPath, RectF oval, |
| float startAngle, float sweepAngle); |
| private static native void native_addRoundRect(int nPath, RectF rect, |
| float rx, float ry, int dir); |
| private static native void native_addRoundRect(int nPath, RectF r, |
| float[] radii, int dir); |
| private static native void native_addPath(int nPath, int src, float dx, |
| float dy); |
| private static native void native_addPath(int nPath, int src); |
| private static native void native_addPath(int nPath, int src, int matrix); |
| private static native void native_offset(int nPath, float dx, float dy, |
| int dst_path); |
| private static native void native_offset(int nPath, float dx, float dy); |
| private static native void native_setLastPoint(int nPath, float dx, float dy); |
| private static native void native_transform(int nPath, int matrix, |
| int dst_path); |
| private static native void native_transform(int nPath, int matrix); |
| private static native void finalizer(int nPath); |
| } |
