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android_frameworks_base/graphics/java/android/graphics/Paint.java
Chris Craik d1d7389880 Update setShadowLayer doc 
bug:17134528
Change-Id: I436bb0163b18d0b88954bf9dac16e51d14a533eb
2014-08-19 22:40:41 +00:00

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/*
* 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.text.GraphicsOperations;
import android.text.SpannableString;
import android.text.SpannedString;
import android.text.TextUtils;
import java.util.Locale;
/**
* The Paint class holds the style and color information about how to draw
* geometries, text and bitmaps.
*/
public class Paint {
/**
* @hide
*/
public long mNativePaint;
/**
* @hide
*/
public long mNativeTypeface;
private ColorFilter mColorFilter;
private MaskFilter mMaskFilter;
private PathEffect mPathEffect;
private Rasterizer mRasterizer;
private Shader mShader;
private Typeface mTypeface;
private Xfermode mXfermode;
private boolean mHasCompatScaling;
private float mCompatScaling;
private float mInvCompatScaling;
private Locale mLocale;
private String mFontFeatureSettings;
/**
* @hide
*/
public int mBidiFlags = BIDI_DEFAULT_LTR;
static final Style[] sStyleArray = {
Style.FILL, Style.STROKE, Style.FILL_AND_STROKE
};
static final Cap[] sCapArray = {
Cap.BUTT, Cap.ROUND, Cap.SQUARE
};
static final Join[] sJoinArray = {
Join.MITER, Join.ROUND, Join.BEVEL
};
static final Align[] sAlignArray = {
Align.LEFT, Align.CENTER, Align.RIGHT
};
/**
* Paint flag that enables antialiasing when drawing.
*
* <p>Enabling this flag will cause all draw operations that support
* antialiasing to use it.</p>
*
* @see #Paint(int)
* @see #setFlags(int)
*/
public static final int ANTI_ALIAS_FLAG = 0x01;
/**
* Paint flag that enables bilinear sampling on scaled bitmaps.
*
* <p>If cleared, scaled bitmaps will be drawn with nearest neighbor
* sampling, likely resulting in artifacts. This should generally be on
* when drawing bitmaps, unless performance-bound (rendering to software
* canvas) or preferring pixelation artifacts to blurriness when scaling
* significantly.</p>
*
* <p>If bitmaps are scaled for device density at creation time (as
* resource bitmaps often are) the filtering will already have been
* done.</p>
*
* @see #Paint(int)
* @see #setFlags(int)
*/
public static final int FILTER_BITMAP_FLAG = 0x02;
/**
* Paint flag that enables dithering when blitting.
*
* <p>Enabling this flag applies a dither to any blit operation where the
* target's colour space is more constrained than the source.
*
* @see #Paint(int)
* @see #setFlags(int)
*/
public static final int DITHER_FLAG = 0x04;
/**
* Paint flag that applies an underline decoration to drawn text.
*
* @see #Paint(int)
* @see #setFlags(int)
*/
public static final int UNDERLINE_TEXT_FLAG = 0x08;
/**
* Paint flag that applies a strike-through decoration to drawn text.
*
* @see #Paint(int)
* @see #setFlags(int)
*/
public static final int STRIKE_THRU_TEXT_FLAG = 0x10;
/**
* Paint flag that applies a synthetic bolding effect to drawn text.
*
* <p>Enabling this flag will cause text draw operations to apply a
* simulated bold effect when drawing a {@link Typeface} that is not
* already bold.</p>
*
* @see #Paint(int)
* @see #setFlags(int)
*/
public static final int FAKE_BOLD_TEXT_FLAG = 0x20;
/**
* Paint flag that enables smooth linear scaling of text.
*
* <p>Enabling this flag does not actually scale text, but rather adjusts
* text draw operations to deal gracefully with smooth adjustment of scale.
* When this flag is enabled, font hinting is disabled to prevent shape
* deformation between scale factors, and glyph caching is disabled due to
* the large number of glyph images that will be generated.</p>
*
* <p>{@link #SUBPIXEL_TEXT_FLAG} should be used in conjunction with this
* flag to prevent glyph positions from snapping to whole pixel values as
* scale factor is adjusted.</p>
*
* @see #Paint(int)
* @see #setFlags(int)
*/
public static final int LINEAR_TEXT_FLAG = 0x40;
/**
* Paint flag that enables subpixel positioning of text.
*
* <p>Enabling this flag causes glyph advances to be computed with subpixel
* accuracy.</p>
*
* <p>This can be used with {@link #LINEAR_TEXT_FLAG} to prevent text from
* jittering during smooth scale transitions.</p>
*
* @see #Paint(int)
* @see #setFlags(int)
*/
public static final int SUBPIXEL_TEXT_FLAG = 0x80;
/** Legacy Paint flag, no longer used. */
public static final int DEV_KERN_TEXT_FLAG = 0x100;
/** @hide bit mask for the flag enabling subpixel glyph rendering for text */
public static final int LCD_RENDER_TEXT_FLAG = 0x200;
/**
* Paint flag that enables the use of bitmap fonts when drawing text.
*
* <p>Disabling this flag will prevent text draw operations from using
* embedded bitmap strikes in fonts, causing fonts with both scalable
* outlines and bitmap strikes to draw only the scalable outlines, and
* fonts with only bitmap strikes to not draw at all.</p>
*
* @see #Paint(int)
* @see #setFlags(int)
*/
public static final int EMBEDDED_BITMAP_TEXT_FLAG = 0x400;
/** @hide bit mask for the flag forcing freetype's autohinter on for text */
public static final int AUTO_HINTING_TEXT_FLAG = 0x800;
/** @hide bit mask for the flag enabling vertical rendering for text */
public static final int VERTICAL_TEXT_FLAG = 0x1000;
// we use this when we first create a paint
static final int DEFAULT_PAINT_FLAGS = DEV_KERN_TEXT_FLAG | EMBEDDED_BITMAP_TEXT_FLAG;
/**
* Font hinter option that disables font hinting.
*
* @see #setHinting(int)
*/
public static final int HINTING_OFF = 0x0;
/**
* Font hinter option that enables font hinting.
*
* @see #setHinting(int)
*/
public static final int HINTING_ON = 0x1;
/**
* Bidi flag to set LTR paragraph direction.
*
* @hide
*/
public static final int BIDI_LTR = 0x0;
/**
* Bidi flag to set RTL paragraph direction.
*
* @hide
*/
public static final int BIDI_RTL = 0x1;
/**
* Bidi flag to detect paragraph direction via heuristics, defaulting to
* LTR.
*
* @hide
*/
public static final int BIDI_DEFAULT_LTR = 0x2;
/**
* Bidi flag to detect paragraph direction via heuristics, defaulting to
* RTL.
*
* @hide
*/
public static final int BIDI_DEFAULT_RTL = 0x3;
/**
* Bidi flag to override direction to all LTR (ignore bidi).
*
* @hide
*/
public static final int BIDI_FORCE_LTR = 0x4;
/**
* Bidi flag to override direction to all RTL (ignore bidi).
*
* @hide
*/
public static final int BIDI_FORCE_RTL = 0x5;
/**
* Maximum Bidi flag value.
* @hide
*/
private static final int BIDI_MAX_FLAG_VALUE = BIDI_FORCE_RTL;
/**
* Mask for bidi flags.
* @hide
*/
private static final int BIDI_FLAG_MASK = 0x7;
/**
* Flag for getTextRunAdvances indicating left-to-right run direction.
* @hide
*/
public static final int DIRECTION_LTR = 0;
/**
* Flag for getTextRunAdvances indicating right-to-left run direction.
* @hide
*/
public static final int DIRECTION_RTL = 1;
/**
* Option for getTextRunCursor to compute the valid cursor after
* offset or the limit of the context, whichever is less.
* @hide
*/
public static final int CURSOR_AFTER = 0;
/**
* Option for getTextRunCursor to compute the valid cursor at or after
* the offset or the limit of the context, whichever is less.
* @hide
*/
public static final int CURSOR_AT_OR_AFTER = 1;
/**
* Option for getTextRunCursor to compute the valid cursor before
* offset or the start of the context, whichever is greater.
* @hide
*/
public static final int CURSOR_BEFORE = 2;
/**
* Option for getTextRunCursor to compute the valid cursor at or before
* offset or the start of the context, whichever is greater.
* @hide
*/
public static final int CURSOR_AT_OR_BEFORE = 3;
/**
* Option for getTextRunCursor to return offset if the cursor at offset
* is valid, or -1 if it isn't.
* @hide
*/
public static final int CURSOR_AT = 4;
/**
* Maximum cursor option value.
*/
private static final int CURSOR_OPT_MAX_VALUE = CURSOR_AT;
/**
* The Style specifies if the primitive being drawn is filled, stroked, or
* both (in the same color). The default is FILL.
*/
public enum Style {
/**
* Geometry and text drawn with this style will be filled, ignoring all
* stroke-related settings in the paint.
*/
FILL (0),
/**
* Geometry and text drawn with this style will be stroked, respecting
* the stroke-related fields on the paint.
*/
STROKE (1),
/**
* Geometry and text drawn with this style will be both filled and
* stroked at the same time, respecting the stroke-related fields on
* the paint. This mode can give unexpected results if the geometry
* is oriented counter-clockwise. This restriction does not apply to
* either FILL or STROKE.
*/
FILL_AND_STROKE (2);
Style(int nativeInt) {
this.nativeInt = nativeInt;
}
final int nativeInt;
}
/**
* The Cap specifies the treatment for the beginning and ending of
* stroked lines and paths. The default is BUTT.
*/
public enum Cap {
/**
* The stroke ends with the path, and does not project beyond it.
*/
BUTT (0),
/**
* The stroke projects out as a semicircle, with the center at the
* end of the path.
*/
ROUND (1),
/**
* The stroke projects out as a square, with the center at the end
* of the path.
*/
SQUARE (2);
private Cap(int nativeInt) {
this.nativeInt = nativeInt;
}
final int nativeInt;
}
/**
* The Join specifies the treatment where lines and curve segments
* join on a stroked path. The default is MITER.
*/
public enum Join {
/**
* The outer edges of a join meet at a sharp angle
*/
MITER (0),
/**
* The outer edges of a join meet in a circular arc.
*/
ROUND (1),
/**
* The outer edges of a join meet with a straight line
*/
BEVEL (2);
private Join(int nativeInt) {
this.nativeInt = nativeInt;
}
final int nativeInt;
}
/**
* Align specifies how drawText aligns its text relative to the
* [x,y] coordinates. The default is LEFT.
*/
public enum Align {
/**
* The text is drawn to the right of the x,y origin
*/
LEFT (0),
/**
* The text is drawn centered horizontally on the x,y origin
*/
CENTER (1),
/**
* The text is drawn to the left of the x,y origin
*/
RIGHT (2);
private Align(int nativeInt) {
this.nativeInt = nativeInt;
}
final int nativeInt;
}
/**
* Create a new paint with default settings.
*/
public Paint() {
this(0);
}
/**
* Create a new paint with the specified flags. Use setFlags() to change
* these after the paint is created.
*
* @param flags initial flag bits, as if they were passed via setFlags().
*/
public Paint(int flags) {
mNativePaint = native_init();
setFlags(flags | DEFAULT_PAINT_FLAGS);
// TODO: Turning off hinting has undesirable side effects, we need to
// revisit hinting once we add support for subpixel positioning
// setHinting(DisplayMetrics.DENSITY_DEVICE >= DisplayMetrics.DENSITY_TV
// ? HINTING_OFF : HINTING_ON);
mCompatScaling = mInvCompatScaling = 1;
setTextLocale(Locale.getDefault());
}
/**
* Create a new paint, initialized with the attributes in the specified
* paint parameter.
*
* @param paint Existing paint used to initialized the attributes of the
* new paint.
*/
public Paint(Paint paint) {
mNativePaint = native_initWithPaint(paint.mNativePaint);
setClassVariablesFrom(paint);
}
/** Restores the paint to its default settings. */
public void reset() {
native_reset(mNativePaint);
setFlags(DEFAULT_PAINT_FLAGS);
// TODO: Turning off hinting has undesirable side effects, we need to
// revisit hinting once we add support for subpixel positioning
// setHinting(DisplayMetrics.DENSITY_DEVICE >= DisplayMetrics.DENSITY_TV
// ? HINTING_OFF : HINTING_ON);
mColorFilter = null;
mMaskFilter = null;
mPathEffect = null;
mRasterizer = null;
mShader = null;
mTypeface = null;
mNativeTypeface = 0;
mXfermode = null;
mHasCompatScaling = false;
mCompatScaling = 1;
mInvCompatScaling = 1;
mBidiFlags = BIDI_DEFAULT_LTR;
setTextLocale(Locale.getDefault());
setElegantTextHeight(false);
mFontFeatureSettings = null;
}
/**
* Copy the fields from src into this paint. This is equivalent to calling
* get() on all of the src fields, and calling the corresponding set()
* methods on this.
*/
public void set(Paint src) {
if (this != src) {
// copy over the native settings
native_set(mNativePaint, src.mNativePaint);
setClassVariablesFrom(src);
}
}
/**
* Set all class variables using current values from the given
* {@link Paint}.
*/
private void setClassVariablesFrom(Paint paint) {
mColorFilter = paint.mColorFilter;
mMaskFilter = paint.mMaskFilter;
mPathEffect = paint.mPathEffect;
mRasterizer = paint.mRasterizer;
if (paint.mShader != null) {
mShader = paint.mShader.copy();
} else {
mShader = null;
}
mTypeface = paint.mTypeface;
mNativeTypeface = paint.mNativeTypeface;
mXfermode = paint.mXfermode;
mHasCompatScaling = paint.mHasCompatScaling;
mCompatScaling = paint.mCompatScaling;
mInvCompatScaling = paint.mInvCompatScaling;
mBidiFlags = paint.mBidiFlags;
mLocale = paint.mLocale;
mFontFeatureSettings = paint.mFontFeatureSettings;
}
/** @hide */
public void setCompatibilityScaling(float factor) {
if (factor == 1.0) {
mHasCompatScaling = false;
mCompatScaling = mInvCompatScaling = 1.0f;
} else {
mHasCompatScaling = true;
mCompatScaling = factor;
mInvCompatScaling = 1.0f/factor;
}
}
/**
* Return the bidi flags on the paint.
*
* @return the bidi flags on the paint
* @hide
*/
public int getBidiFlags() {
return mBidiFlags;
}
/**
* Set the bidi flags on the paint.
* @hide
*/
public void setBidiFlags(int flags) {
// only flag value is the 3-bit BIDI control setting
flags &= BIDI_FLAG_MASK;
if (flags > BIDI_MAX_FLAG_VALUE) {
throw new IllegalArgumentException("unknown bidi flag: " + flags);
}
mBidiFlags = flags;
}
/**
* Return the paint's flags. Use the Flag enum to test flag values.
*
* @return the paint's flags (see enums ending in _Flag for bit masks)
*/
public native int getFlags();
/**
* Set the paint's flags. Use the Flag enum to specific flag values.
*
* @param flags The new flag bits for the paint
*/
public native void setFlags(int flags);
/**
* Return the paint's hinting mode. Returns either
* {@link #HINTING_OFF} or {@link #HINTING_ON}.
*/
public native int getHinting();
/**
* Set the paint's hinting mode. May be either
* {@link #HINTING_OFF} or {@link #HINTING_ON}.
*/
public native void setHinting(int mode);
/**
* Helper for getFlags(), returning true if ANTI_ALIAS_FLAG bit is set
* AntiAliasing smooths out the edges of what is being drawn, but is has
* no impact on the interior of the shape. See setDither() and
* setFilterBitmap() to affect how colors are treated.
*
* @return true if the antialias bit is set in the paint's flags.
*/
public final boolean isAntiAlias() {
return (getFlags() & ANTI_ALIAS_FLAG) != 0;
}
/**
* Helper for setFlags(), setting or clearing the ANTI_ALIAS_FLAG bit
* AntiAliasing smooths out the edges of what is being drawn, but is has
* no impact on the interior of the shape. See setDither() and
* setFilterBitmap() to affect how colors are treated.
*
* @param aa true to set the antialias bit in the flags, false to clear it
*/
public native void setAntiAlias(boolean aa);
/**
* Helper for getFlags(), returning true if DITHER_FLAG bit is set
* Dithering affects how colors that are higher precision than the device
* are down-sampled. No dithering is generally faster, but higher precision
* colors are just truncated down (e.g. 8888 -> 565). Dithering tries to
* distribute the error inherent in this process, to reduce the visual
* artifacts.
*
* @return true if the dithering bit is set in the paint's flags.
*/
public final boolean isDither() {
return (getFlags() & DITHER_FLAG) != 0;
}
/**
* Helper for setFlags(), setting or clearing the DITHER_FLAG bit
* Dithering affects how colors that are higher precision than the device
* are down-sampled. No dithering is generally faster, but higher precision
* colors are just truncated down (e.g. 8888 -> 565). Dithering tries to
* distribute the error inherent in this process, to reduce the visual
* artifacts.
*
* @param dither true to set the dithering bit in flags, false to clear it
*/
public native void setDither(boolean dither);
/**
* Helper for getFlags(), returning true if LINEAR_TEXT_FLAG bit is set
*
* @return true if the lineartext bit is set in the paint's flags
*/
public final boolean isLinearText() {
return (getFlags() & LINEAR_TEXT_FLAG) != 0;
}
/**
* Helper for setFlags(), setting or clearing the LINEAR_TEXT_FLAG bit
*
* @param linearText true to set the linearText bit in the paint's flags,
* false to clear it.
*/
public native void setLinearText(boolean linearText);
/**
* Helper for getFlags(), returning true if SUBPIXEL_TEXT_FLAG bit is set
*
* @return true if the subpixel bit is set in the paint's flags
*/
public final boolean isSubpixelText() {
return (getFlags() & SUBPIXEL_TEXT_FLAG) != 0;
}
/**
* Helper for setFlags(), setting or clearing the SUBPIXEL_TEXT_FLAG bit
*
* @param subpixelText true to set the subpixelText bit in the paint's
* flags, false to clear it.
*/
public native void setSubpixelText(boolean subpixelText);
/**
* Helper for getFlags(), returning true if UNDERLINE_TEXT_FLAG bit is set
*
* @return true if the underlineText bit is set in the paint's flags.
*/
public final boolean isUnderlineText() {
return (getFlags() & UNDERLINE_TEXT_FLAG) != 0;
}
/**
* Helper for setFlags(), setting or clearing the UNDERLINE_TEXT_FLAG bit
*
* @param underlineText true to set the underlineText bit in the paint's
* flags, false to clear it.
*/
public native void setUnderlineText(boolean underlineText);
/**
* Helper for getFlags(), returning true if STRIKE_THRU_TEXT_FLAG bit is set
*
* @return true if the strikeThruText bit is set in the paint's flags.
*/
public final boolean isStrikeThruText() {
return (getFlags() & STRIKE_THRU_TEXT_FLAG) != 0;
}
/**
* Helper for setFlags(), setting or clearing the STRIKE_THRU_TEXT_FLAG bit
*
* @param strikeThruText true to set the strikeThruText bit in the paint's
* flags, false to clear it.
*/
public native void setStrikeThruText(boolean strikeThruText);
/**
* Helper for getFlags(), returning true if FAKE_BOLD_TEXT_FLAG bit is set
*
* @return true if the fakeBoldText bit is set in the paint's flags.
*/
public final boolean isFakeBoldText() {
return (getFlags() & FAKE_BOLD_TEXT_FLAG) != 0;
}
/**
* Helper for setFlags(), setting or clearing the FAKE_BOLD_TEXT_FLAG bit
*
* @param fakeBoldText true to set the fakeBoldText bit in the paint's
* flags, false to clear it.
*/
public native void setFakeBoldText(boolean fakeBoldText);
/**
* Whether or not the bitmap filter is activated.
* Filtering affects the sampling of bitmaps when they are transformed.
* Filtering does not affect how the colors in the bitmap are converted into
* device pixels. That is dependent on dithering and xfermodes.
*
* @see #setFilterBitmap(boolean) setFilterBitmap()
*/
public final boolean isFilterBitmap() {
return (getFlags() & FILTER_BITMAP_FLAG) != 0;
}
/**
* Helper for setFlags(), setting or clearing the FILTER_BITMAP_FLAG bit.
* Filtering affects the sampling of bitmaps when they are transformed.
* Filtering does not affect how the colors in the bitmap are converted into
* device pixels. That is dependent on dithering and xfermodes.
*
* @param filter true to set the FILTER_BITMAP_FLAG bit in the paint's
* flags, false to clear it.
*/
public native void setFilterBitmap(boolean filter);
/**
* Return the paint's style, used for controlling how primitives'
* geometries are interpreted (except for drawBitmap, which always assumes
* FILL_STYLE).
*
* @return the paint's style setting (Fill, Stroke, StrokeAndFill)
*/
public Style getStyle() {
return sStyleArray[native_getStyle(mNativePaint)];
}
/**
* Set the paint's style, used for controlling how primitives'
* geometries are interpreted (except for drawBitmap, which always assumes
* Fill).
*
* @param style The new style to set in the paint
*/
public void setStyle(Style style) {
native_setStyle(mNativePaint, style.nativeInt);
}
/**
* Return the paint's color. Note that the color is a 32bit value
* containing alpha as well as r,g,b. This 32bit value is not premultiplied,
* meaning that its alpha can be any value, regardless of the values of
* r,g,b. See the Color class for more details.
*
* @return the paint's color (and alpha).
*/
public native int getColor();
/**
* Set the paint's color. Note that the color is an int containing alpha
* as well as r,g,b. This 32bit value is not premultiplied, meaning that
* its alpha can be any value, regardless of the values of r,g,b.
* See the Color class for more details.
*
* @param color The new color (including alpha) to set in the paint.
*/
public native void setColor(int color);
/**
* Helper to getColor() that just returns the color's alpha value. This is
* the same as calling getColor() >>> 24. It always returns a value between
* 0 (completely transparent) and 255 (completely opaque).
*
* @return the alpha component of the paint's color.
*/
public native int getAlpha();
/**
* Helper to setColor(), that only assigns the color's alpha value,
* leaving its r,g,b values unchanged. Results are undefined if the alpha
* value is outside of the range [0..255]
*
* @param a set the alpha component [0..255] of the paint's color.
*/
public native void setAlpha(int a);
/**
* Helper to setColor(), that takes a,r,g,b and constructs the color int
*
* @param a The new alpha component (0..255) of the paint's color.
* @param r The new red component (0..255) of the paint's color.
* @param g The new green component (0..255) of the paint's color.
* @param b The new blue component (0..255) of the paint's color.
*/
public void setARGB(int a, int r, int g, int b) {
setColor((a << 24) | (r << 16) | (g << 8) | b);
}
/**
* Return the width for stroking.
* <p />
* A value of 0 strokes in hairline mode.
* Hairlines always draws a single pixel independent of the canva's matrix.
*
* @return the paint's stroke width, used whenever the paint's style is
* Stroke or StrokeAndFill.
*/
public native float getStrokeWidth();
/**
* Set the width for stroking.
* Pass 0 to stroke in hairline mode.
* Hairlines always draws a single pixel independent of the canva's matrix.
*
* @param width set the paint's stroke width, used whenever the paint's
* style is Stroke or StrokeAndFill.
*/
public native void setStrokeWidth(float width);
/**
* Return the paint's stroke miter value. Used to control the behavior
* of miter joins when the joins angle is sharp.
*
* @return the paint's miter limit, used whenever the paint's style is
* Stroke or StrokeAndFill.
*/
public native float getStrokeMiter();
/**
* Set the paint's stroke miter value. This is used to control the behavior
* of miter joins when the joins angle is sharp. This value must be >= 0.
*
* @param miter set the miter limit on the paint, used whenever the paint's
* style is Stroke or StrokeAndFill.
*/
public native void setStrokeMiter(float miter);
/**
* Return the paint's Cap, controlling how the start and end of stroked
* lines and paths are treated.
*
* @return the line cap style for the paint, used whenever the paint's
* style is Stroke or StrokeAndFill.
*/
public Cap getStrokeCap() {
return sCapArray[native_getStrokeCap(mNativePaint)];
}
/**
* Set the paint's Cap.
*
* @param cap set the paint's line cap style, used whenever the paint's
* style is Stroke or StrokeAndFill.
*/
public void setStrokeCap(Cap cap) {
native_setStrokeCap(mNativePaint, cap.nativeInt);
}
/**
* Return the paint's stroke join type.
*
* @return the paint's Join.
*/
public Join getStrokeJoin() {
return sJoinArray[native_getStrokeJoin(mNativePaint)];
}
/**
* Set the paint's Join.
*
* @param join set the paint's Join, used whenever the paint's style is
* Stroke or StrokeAndFill.
*/
public void setStrokeJoin(Join join) {
native_setStrokeJoin(mNativePaint, join.nativeInt);
}
/**
* Applies any/all effects (patheffect, stroking) to src, returning the
* result in dst. The result is that drawing src with this paint will be
* the same as drawing dst with a default paint (at least from the
* geometric perspective).
*
* @param src input path
* @param dst output path (may be the same as src)
* @return true if the path should be filled, or false if it should be
* drawn with a hairline (width == 0)
*/
public boolean getFillPath(Path src, Path dst) {
return native_getFillPath(mNativePaint, src.ni(), dst.ni());
}
/**
* Get the paint's shader object.
*
* @return the paint's shader (or null)
*/
public Shader getShader() {
return mShader;
}
/**
* Set or clear the shader object.
* <p />
* Pass null to clear any previous shader.
* As a convenience, the parameter passed is also returned.
*
* @param shader May be null. the new shader to be installed in the paint
* @return shader
*/
public Shader setShader(Shader shader) {
long shaderNative = 0;
if (shader != null)
shaderNative = shader.getNativeInstance();
native_setShader(mNativePaint, shaderNative);
mShader = shader;
return shader;
}
/**
* Get the paint's colorfilter (maybe be null).
*
* @return the paint's colorfilter (maybe be null)
*/
public ColorFilter getColorFilter() {
return mColorFilter;
}
/**
* Set or clear the paint's colorfilter, returning the parameter.
*
* @param filter May be null. The new filter to be installed in the paint
* @return filter
*/
public ColorFilter setColorFilter(ColorFilter filter) {
long filterNative = 0;
if (filter != null)
filterNative = filter.native_instance;
native_setColorFilter(mNativePaint, filterNative);
mColorFilter = filter;
return filter;
}
/**
* Get the paint's xfermode object.
*
* @return the paint's xfermode (or null)
*/
public Xfermode getXfermode() {
return mXfermode;
}
/**
* Set or clear the xfermode object.
* <p />
* Pass null to clear any previous xfermode.
* As a convenience, the parameter passed is also returned.
*
* @param xfermode May be null. The xfermode to be installed in the paint
* @return xfermode
*/
public Xfermode setXfermode(Xfermode xfermode) {
long xfermodeNative = 0;
if (xfermode != null)
xfermodeNative = xfermode.native_instance;
native_setXfermode(mNativePaint, xfermodeNative);
mXfermode = xfermode;
return xfermode;
}
/**
* Get the paint's patheffect object.
*
* @return the paint's patheffect (or null)
*/
public PathEffect getPathEffect() {
return mPathEffect;
}
/**
* Set or clear the patheffect object.
* <p />
* Pass null to clear any previous patheffect.
* As a convenience, the parameter passed is also returned.
*
* @param effect May be null. The patheffect to be installed in the paint
* @return effect
*/
public PathEffect setPathEffect(PathEffect effect) {
long effectNative = 0;
if (effect != null) {
effectNative = effect.native_instance;
}
native_setPathEffect(mNativePaint, effectNative);
mPathEffect = effect;
return effect;
}
/**
* Get the paint's maskfilter object.
*
* @return the paint's maskfilter (or null)
*/
public MaskFilter getMaskFilter() {
return mMaskFilter;
}
/**
* Set or clear the maskfilter object.
* <p />
* Pass null to clear any previous maskfilter.
* As a convenience, the parameter passed is also returned.
*
* @param maskfilter May be null. The maskfilter to be installed in the
* paint
* @return maskfilter
*/
public MaskFilter setMaskFilter(MaskFilter maskfilter) {
long maskfilterNative = 0;
if (maskfilter != null) {
maskfilterNative = maskfilter.native_instance;
}
native_setMaskFilter(mNativePaint, maskfilterNative);
mMaskFilter = maskfilter;
return maskfilter;
}
/**
* Get the paint's typeface object.
* <p />
* The typeface object identifies which font to use when drawing or
* measuring text.
*
* @return the paint's typeface (or null)
*/
public Typeface getTypeface() {
return mTypeface;
}
/**
* Set or clear the typeface object.
* <p />
* Pass null to clear any previous typeface.
* As a convenience, the parameter passed is also returned.
*
* @param typeface May be null. The typeface to be installed in the paint
* @return typeface
*/
public Typeface setTypeface(Typeface typeface) {
long typefaceNative = 0;
if (typeface != null) {
typefaceNative = typeface.native_instance;
}
native_setTypeface(mNativePaint, typefaceNative);
mTypeface = typeface;
mNativeTypeface = typefaceNative;
return typeface;
}
/**
* Get the paint's rasterizer (or null).
* <p />
* The raster controls/modifies how paths/text are turned into alpha masks.
*
* @return the paint's rasterizer (or null)
*
* @deprecated Rasterizer is not supported by either the HW or PDF backends.
*/
@Deprecated
public Rasterizer getRasterizer() {
return mRasterizer;
}
/**
* Set or clear the rasterizer object.
* <p />
* Pass null to clear any previous rasterizer.
* As a convenience, the parameter passed is also returned.
*
* @param rasterizer May be null. The new rasterizer to be installed in
* the paint.
* @return rasterizer
*
* @deprecated Rasterizer is not supported by either the HW or PDF backends.
*/
@Deprecated
public Rasterizer setRasterizer(Rasterizer rasterizer) {
long rasterizerNative = 0;
if (rasterizer != null) {
rasterizerNative = rasterizer.native_instance;
}
native_setRasterizer(mNativePaint, rasterizerNative);
mRasterizer = rasterizer;
return rasterizer;
}
/**
* This draws a shadow layer below the main layer, with the specified
* offset and color, and blur radius. If radius is 0, then the shadow
* layer is removed.
* <p>
* Can be used to create a blurred shadow underneath text. Support for use
* with other drawing operations is constrained to the software rendering
* pipeline.
* <p>
* The alpha of the shadow will be the paint's alpha if the shadow color is
* opaque, or the alpha from the shadow color if not.
*/
public void setShadowLayer(float radius, float dx, float dy, int shadowColor) {
native_setShadowLayer(mNativePaint, radius, dx, dy, shadowColor);
}
/**
* Clear the shadow layer.
*/
public void clearShadowLayer() {
setShadowLayer(0, 0, 0, 0);
}
/**
* Checks if the paint has a shadow layer attached
*
* @return true if the paint has a shadow layer attached and false otherwise
* @hide
*/
public boolean hasShadowLayer() {
return native_hasShadowLayer(mNativePaint);
}
/**
* Return the paint's Align value for drawing text. This controls how the
* text is positioned relative to its origin. LEFT align means that all of
* the text will be drawn to the right of its origin (i.e. the origin
* specifieds the LEFT edge of the text) and so on.
*
* @return the paint's Align value for drawing text.
*/
public Align getTextAlign() {
return sAlignArray[native_getTextAlign(mNativePaint)];
}
/**
* Set the paint's text alignment. This controls how the
* text is positioned relative to its origin. LEFT align means that all of
* the text will be drawn to the right of its origin (i.e. the origin
* specifieds the LEFT edge of the text) and so on.
*
* @param align set the paint's Align value for drawing text.
*/
public void setTextAlign(Align align) {
native_setTextAlign(mNativePaint, align.nativeInt);
}
/**
* Get the text Locale.
*
* @return the paint's Locale used for drawing text, never null.
*/
public Locale getTextLocale() {
return mLocale;
}
/**
* Set the text locale.
*
* The text locale affects how the text is drawn for some languages.
*
* For example, if the locale is {@link Locale#CHINESE} or {@link Locale#CHINA},
* then the text renderer will prefer to draw text using a Chinese font. Likewise,
* if the locale is {@link Locale#JAPANESE} or {@link Locale#JAPAN}, then the text
* renderer will prefer to draw text using a Japanese font.
*
* This distinction is important because Chinese and Japanese text both use many
* of the same Unicode code points but their appearance is subtly different for
* each language.
*
* By default, the text locale is initialized to the system locale (as returned
* by {@link Locale#getDefault}). This assumes that the text to be rendered will
* most likely be in the user's preferred language.
*
* If the actual language of the text is known, then it can be provided to the
* text renderer using this method. The text renderer may attempt to guess the
* language script based on the contents of the text to be drawn independent of
* the text locale here. Specifying the text locale just helps it do a better
* job in certain ambiguous cases
*
* @param locale the paint's locale value for drawing text, must not be null.
*/
public void setTextLocale(Locale locale) {
if (locale == null) {
throw new IllegalArgumentException("locale cannot be null");
}
if (locale.equals(mLocale)) return;
mLocale = locale;
native_setTextLocale(mNativePaint, locale.toString());
}
/**
* Get the elegant metrics flag.
*
* @return true if elegant metrics are enabled for text drawing.
*/
public native boolean isElegantTextHeight();
/**
* Set the paint's elegant height metrics flag. This setting selects font
* variants that have not been compacted to fit Latin-based vertical
* metrics, and also increases top and bottom bounds to provide more space.
*
* @param elegant set the paint's elegant metrics flag for drawing text.
*/
public native void setElegantTextHeight(boolean elegant);
/**
* Return the paint's text size.
*
* @return the paint's text size.
*/
public native float getTextSize();
/**
* Set the paint's text size. This value must be > 0
*
* @param textSize set the paint's text size.
*/
public native void setTextSize(float textSize);
/**
* Return the paint's horizontal scale factor for text. The default value
* is 1.0.
*
* @return the paint's scale factor in X for drawing/measuring text
*/
public native float getTextScaleX();
/**
* Set the paint's horizontal scale factor for text. The default value
* is 1.0. Values > 1.0 will stretch the text wider. Values < 1.0 will
* stretch the text narrower.
*
* @param scaleX set the paint's scale in X for drawing/measuring text.
*/
public native void setTextScaleX(float scaleX);
/**
* Return the paint's horizontal skew factor for text. The default value
* is 0.
*
* @return the paint's skew factor in X for drawing text.
*/
public native float getTextSkewX();
/**
* Set the paint's horizontal skew factor for text. The default value
* is 0. For approximating oblique text, use values around -0.25.
*
* @param skewX set the paint's skew factor in X for drawing text.
*/
public native void setTextSkewX(float skewX);
/**
* Return the paint's letter-spacing for text. The default value
* is 0.
*
* @return the paint's letter-spacing for drawing text.
*/
public float getLetterSpacing() {
return native_getLetterSpacing(mNativePaint);
}
/**
* Set the paint's letter-spacing for text. The default value
* is 0. The value is in 'EM' units. Typical values for slight
* expansion will be around 0.05. Negative values tighten text.
*
* @param letterSpacing set the paint's letter-spacing for drawing text.
*/
public void setLetterSpacing(float letterSpacing) {
native_setLetterSpacing(mNativePaint, letterSpacing);
}
/**
* Get font feature settings. Default is null.
*
* @return the paint's currently set font feature settings.
*/
public String getFontFeatureSettings() {
return mFontFeatureSettings;
}
/**
* Set font feature settings.
*
* The format is the same as the CSS font-feature-settings attribute:
* http://dev.w3.org/csswg/css-fonts/#propdef-font-feature-settings
*
* @param settings the font feature settings string to use, may be null.
*/
public void setFontFeatureSettings(String settings) {
if (settings != null && settings.equals("")) {
settings = null;
}
if ((settings == null && mFontFeatureSettings == null)
|| (settings != null && settings.equals(mFontFeatureSettings))) {
return;
}
mFontFeatureSettings = settings;
native_setFontFeatureSettings(mNativePaint, settings);
}
/**
* Return the distance above (negative) the baseline (ascent) based on the
* current typeface and text size.
*
* @return the distance above (negative) the baseline (ascent) based on the
* current typeface and text size.
*/
public native float ascent();
/**
* Return the distance below (positive) the baseline (descent) based on the
* current typeface and text size.
*
* @return the distance below (positive) the baseline (descent) based on
* the current typeface and text size.
*/
public native float descent();
/**
* Class that describes the various metrics for a font at a given text size.
* Remember, Y values increase going down, so those values will be positive,
* and values that measure distances going up will be negative. This class
* is returned by getFontMetrics().
*/
public static class FontMetrics {
/**
* The maximum distance above the baseline for the tallest glyph in
* the font at a given text size.
*/
public float top;
/**
* The recommended distance above the baseline for singled spaced text.
*/
public float ascent;
/**
* The recommended distance below the baseline for singled spaced text.
*/
public float descent;
/**
* The maximum distance below the baseline for the lowest glyph in
* the font at a given text size.
*/
public float bottom;
/**
* The recommended additional space to add between lines of text.
*/
public float leading;
}
/**
* Return the font's recommended interline spacing, given the Paint's
* settings for typeface, textSize, etc. If metrics is not null, return the
* fontmetric values in it.
*
* @param metrics If this object is not null, its fields are filled with
* the appropriate values given the paint's text attributes.
* @return the font's recommended interline spacing.
*/
public native float getFontMetrics(FontMetrics metrics);
/**
* Allocates a new FontMetrics object, and then calls getFontMetrics(fm)
* with it, returning the object.
*/
public FontMetrics getFontMetrics() {
FontMetrics fm = new FontMetrics();
getFontMetrics(fm);
return fm;
}
/**
* Convenience method for callers that want to have FontMetrics values as
* integers.
*/
public static class FontMetricsInt {
public int top;
public int ascent;
public int descent;
public int bottom;
public int leading;
@Override public String toString() {
return "FontMetricsInt: top=" + top + " ascent=" + ascent +
" descent=" + descent + " bottom=" + bottom +
" leading=" + leading;
}
}
/**
* Return the font's interline spacing, given the Paint's settings for
* typeface, textSize, etc. If metrics is not null, return the fontmetric
* values in it. Note: all values have been converted to integers from
* floats, in such a way has to make the answers useful for both spacing
* and clipping. If you want more control over the rounding, call
* getFontMetrics().
*
* @return the font's interline spacing.
*/
public native int getFontMetricsInt(FontMetricsInt fmi);
public FontMetricsInt getFontMetricsInt() {
FontMetricsInt fm = new FontMetricsInt();
getFontMetricsInt(fm);
return fm;
}
/**
* Return the recommend line spacing based on the current typeface and
* text size.
*
* @return recommend line spacing based on the current typeface and
* text size.
*/
public float getFontSpacing() {
return getFontMetrics(null);
}
/**
* Return the width of the text.
*
* @param text The text to measure. Cannot be null.
* @param index The index of the first character to start measuring
* @param count THe number of characters to measure, beginning with start
* @return The width of the text
*/
public float measureText(char[] text, int index, int count) {
if (text == null) {
throw new IllegalArgumentException("text cannot be null");
}
if ((index | count) < 0 || index + count > text.length) {
throw new ArrayIndexOutOfBoundsException();
}
if (text.length == 0 || count == 0) {
return 0f;
}
if (!mHasCompatScaling) {
return (float) Math.ceil(native_measureText(text, index, count, mBidiFlags));
}
final float oldSize = getTextSize();
setTextSize(oldSize*mCompatScaling);
float w = native_measureText(text, index, count, mBidiFlags);
setTextSize(oldSize);
return (float) Math.ceil(w*mInvCompatScaling);
}
private native float native_measureText(char[] text, int index, int count, int bidiFlags);
/**
* Return the width of the text.
*
* @param text The text to measure. Cannot be null.
* @param start The index of the first character to start measuring
* @param end 1 beyond the index of the last character to measure
* @return The width of the text
*/
public float measureText(String text, int start, int end) {
if (text == null) {
throw new IllegalArgumentException("text cannot be null");
}
if ((start | end | (end - start) | (text.length() - end)) < 0) {
throw new IndexOutOfBoundsException();
}
if (text.length() == 0 || start == end) {
return 0f;
}
if (!mHasCompatScaling) {
return (float) Math.ceil(native_measureText(text, start, end, mBidiFlags));
}
final float oldSize = getTextSize();
setTextSize(oldSize*mCompatScaling);
float w = native_measureText(text, start, end, mBidiFlags);
setTextSize(oldSize);
return (float) Math.ceil(w*mInvCompatScaling);
}
private native float native_measureText(String text, int start, int end, int bidiFlags);
/**
* Return the width of the text.
*
* @param text The text to measure. Cannot be null.
* @return The width of the text
*/
public float measureText(String text) {
if (text == null) {
throw new IllegalArgumentException("text cannot be null");
}
if (text.length() == 0) {
return 0f;
}
if (!mHasCompatScaling) {
return (float) Math.ceil(native_measureText(text, mBidiFlags));
}
final float oldSize = getTextSize();
setTextSize(oldSize*mCompatScaling);
float w = native_measureText(text, mBidiFlags);
setTextSize(oldSize);
return (float) Math.ceil(w*mInvCompatScaling);
}
private native float native_measureText(String text, int bidiFlags);
/**
* Return the width of the text.
*
* @param text The text to measure
* @param start The index of the first character to start measuring
* @param end 1 beyond the index of the last character to measure
* @return The width of the text
*/
public float measureText(CharSequence text, int start, int end) {
if (text == null) {
throw new IllegalArgumentException("text cannot be null");
}
if ((start | end | (end - start) | (text.length() - end)) < 0) {
throw new IndexOutOfBoundsException();
}
if (text.length() == 0 || start == end) {
return 0f;
}
if (text instanceof String) {
return measureText((String)text, start, end);
}
if (text instanceof SpannedString ||
text instanceof SpannableString) {
return measureText(text.toString(), start, end);
}
if (text instanceof GraphicsOperations) {
return ((GraphicsOperations)text).measureText(start, end, this);
}
char[] buf = TemporaryBuffer.obtain(end - start);
TextUtils.getChars(text, start, end, buf, 0);
float result = measureText(buf, 0, end - start);
TemporaryBuffer.recycle(buf);
return result;
}
/**
* Measure the text, stopping early if the measured width exceeds maxWidth.
* Return the number of chars that were measured, and if measuredWidth is
* not null, return in it the actual width measured.
*
* @param text The text to measure. Cannot be null.
* @param index The offset into text to begin measuring at
* @param count The number of maximum number of entries to measure. If count
* is negative, then the characters are measured in reverse order.
* @param maxWidth The maximum width to accumulate.
* @param measuredWidth Optional. If not null, returns the actual width
* measured.
* @return The number of chars that were measured. Will always be <=
* abs(count).
*/
public int breakText(char[] text, int index, int count,
float maxWidth, float[] measuredWidth) {
if (text == null) {
throw new IllegalArgumentException("text cannot be null");
}
if (index < 0 || text.length - index < Math.abs(count)) {
throw new ArrayIndexOutOfBoundsException();
}
if (text.length == 0 || count == 0) {
return 0;
}
if (!mHasCompatScaling) {
return native_breakText(mNativePaint, mNativeTypeface, text, index, count, maxWidth,
mBidiFlags, measuredWidth);
}
final float oldSize = getTextSize();
setTextSize(oldSize * mCompatScaling);
int res = native_breakText(mNativePaint, mNativeTypeface, text, index, count,
maxWidth * mCompatScaling, mBidiFlags, measuredWidth);
setTextSize(oldSize);
if (measuredWidth != null) measuredWidth[0] *= mInvCompatScaling;
return res;
}
private static native int native_breakText(long native_object, long native_typeface,
char[] text, int index, int count,
float maxWidth, int bidiFlags, float[] measuredWidth);
/**
* Measure the text, stopping early if the measured width exceeds maxWidth.
* Return the number of chars that were measured, and if measuredWidth is
* not null, return in it the actual width measured.
*
* @param text The text to measure. Cannot be null.
* @param start The offset into text to begin measuring at
* @param end The end of the text slice to measure.
* @param measureForwards If true, measure forwards, starting at start.
* Otherwise, measure backwards, starting with end.
* @param maxWidth The maximum width to accumulate.
* @param measuredWidth Optional. If not null, returns the actual width
* measured.
* @return The number of chars that were measured. Will always be <=
* abs(end - start).
*/
public int breakText(CharSequence text, int start, int end,
boolean measureForwards,
float maxWidth, float[] measuredWidth) {
if (text == null) {
throw new IllegalArgumentException("text cannot be null");
}
if ((start | end | (end - start) | (text.length() - end)) < 0) {
throw new IndexOutOfBoundsException();
}
if (text.length() == 0 || start == end) {
return 0;
}
if (start == 0 && text instanceof String && end == text.length()) {
return breakText((String) text, measureForwards, maxWidth,
measuredWidth);
}
char[] buf = TemporaryBuffer.obtain(end - start);
int result;
TextUtils.getChars(text, start, end, buf, 0);
if (measureForwards) {
result = breakText(buf, 0, end - start, maxWidth, measuredWidth);
} else {
result = breakText(buf, 0, -(end - start), maxWidth, measuredWidth);
}
TemporaryBuffer.recycle(buf);
return result;
}
/**
* Measure the text, stopping early if the measured width exceeds maxWidth.
* Return the number of chars that were measured, and if measuredWidth is
* not null, return in it the actual width measured.
*
* @param text The text to measure. Cannot be null.
* @param measureForwards If true, measure forwards, starting with the
* first character in the string. Otherwise,
* measure backwards, starting with the
* last character in the string.
* @param maxWidth The maximum width to accumulate.
* @param measuredWidth Optional. If not null, returns the actual width
* measured.
* @return The number of chars that were measured. Will always be <=
* abs(count).
*/
public int breakText(String text, boolean measureForwards,
float maxWidth, float[] measuredWidth) {
if (text == null) {
throw new IllegalArgumentException("text cannot be null");
}
if (text.length() == 0) {
return 0;
}
if (!mHasCompatScaling) {
return native_breakText(mNativePaint, mNativeTypeface, text, measureForwards,
maxWidth, mBidiFlags, measuredWidth);
}
final float oldSize = getTextSize();
setTextSize(oldSize*mCompatScaling);
int res = native_breakText(mNativePaint, mNativeTypeface, text, measureForwards,
maxWidth*mCompatScaling, mBidiFlags, measuredWidth);
setTextSize(oldSize);
if (measuredWidth != null) measuredWidth[0] *= mInvCompatScaling;
return res;
}
private static native int native_breakText(long native_object, long native_typeface,
String text, boolean measureForwards,
float maxWidth, int bidiFlags, float[] measuredWidth);
/**
* Return the advance widths for the characters in the string.
*
* @param text The text to measure. Cannot be null.
* @param index The index of the first char to to measure
* @param count The number of chars starting with index to measure
* @param widths array to receive the advance widths of the characters.
* Must be at least a large as count.
* @return the actual number of widths returned.
*/
public int getTextWidths(char[] text, int index, int count,
float[] widths) {
if (text == null) {
throw new IllegalArgumentException("text cannot be null");
}
if ((index | count) < 0 || index + count > text.length
|| count > widths.length) {
throw new ArrayIndexOutOfBoundsException();
}
if (text.length == 0 || count == 0) {
return 0;
}
if (!mHasCompatScaling) {
return native_getTextWidths(mNativePaint, mNativeTypeface, text, index, count, mBidiFlags, widths);
}
final float oldSize = getTextSize();
setTextSize(oldSize*mCompatScaling);
int res = native_getTextWidths(mNativePaint, mNativeTypeface, text, index, count, mBidiFlags, widths);
setTextSize(oldSize);
for (int i=0; i<res; i++) {
widths[i] *= mInvCompatScaling;
}
return res;
}
/**
* Return the advance widths for the characters in the string.
*
* @param text The text to measure. Cannot be null.
* @param start The index of the first char to to measure
* @param end The end of the text slice to measure
* @param widths array to receive the advance widths of the characters.
* Must be at least a large as (end - start).
* @return the actual number of widths returned.
*/
public int getTextWidths(CharSequence text, int start, int end,
float[] widths) {
if (text == null) {
throw new IllegalArgumentException("text cannot be null");
}
if ((start | end | (end - start) | (text.length() - end)) < 0) {
throw new IndexOutOfBoundsException();
}
if (end - start > widths.length) {
throw new ArrayIndexOutOfBoundsException();
}
if (text.length() == 0 || start == end) {
return 0;
}
if (text instanceof String) {
return getTextWidths((String) text, start, end, widths);
}
if (text instanceof SpannedString ||
text instanceof SpannableString) {
return getTextWidths(text.toString(), start, end, widths);
}
if (text instanceof GraphicsOperations) {
return ((GraphicsOperations) text).getTextWidths(start, end,
widths, this);
}
char[] buf = TemporaryBuffer.obtain(end - start);
TextUtils.getChars(text, start, end, buf, 0);
int result = getTextWidths(buf, 0, end - start, widths);
TemporaryBuffer.recycle(buf);
return result;
}
/**
* Return the advance widths for the characters in the string.
*
* @param text The text to measure. Cannot be null.
* @param start The index of the first char to to measure
* @param end The end of the text slice to measure
* @param widths array to receive the advance widths of the characters.
* Must be at least a large as the text.
* @return the number of unichars in the specified text.
*/
public int getTextWidths(String text, int start, int end, float[] widths) {
if (text == null) {
throw new IllegalArgumentException("text cannot be null");
}
if ((start | end | (end - start) | (text.length() - end)) < 0) {
throw new IndexOutOfBoundsException();
}
if (end - start > widths.length) {
throw new ArrayIndexOutOfBoundsException();
}
if (text.length() == 0 || start == end) {
return 0;
}
if (!mHasCompatScaling) {
return native_getTextWidths(mNativePaint, mNativeTypeface, text, start, end, mBidiFlags, widths);
}
final float oldSize = getTextSize();
setTextSize(oldSize*mCompatScaling);
int res = native_getTextWidths(mNativePaint, mNativeTypeface, text, start, end, mBidiFlags, widths);
setTextSize(oldSize);
for (int i=0; i<res; i++) {
widths[i] *= mInvCompatScaling;
}
return res;
}
/**
* Return the advance widths for the characters in the string.
*
* @param text The text to measure
* @param widths array to receive the advance widths of the characters.
* Must be at least a large as the text.
* @return the number of unichars in the specified text.
*/
public int getTextWidths(String text, float[] widths) {
return getTextWidths(text, 0, text.length(), widths);
}
/**
* Convenience overload that takes a char array instead of a
* String.
*
* @see #getTextRunAdvances(String, int, int, int, int, int, float[], int)
* @hide
*/
public float getTextRunAdvances(char[] chars, int index, int count,
int contextIndex, int contextCount, boolean isRtl, float[] advances,
int advancesIndex) {
if (chars == null) {
throw new IllegalArgumentException("text cannot be null");
}
if ((index | count | contextIndex | contextCount | advancesIndex
| (index - contextIndex) | (contextCount - count)
| ((contextIndex + contextCount) - (index + count))
| (chars.length - (contextIndex + contextCount))
| (advances == null ? 0 :
(advances.length - (advancesIndex + count)))) < 0) {
throw new IndexOutOfBoundsException();
}
if (chars.length == 0 || count == 0){
return 0f;
}
if (!mHasCompatScaling) {
return native_getTextRunAdvances(mNativePaint, mNativeTypeface, chars, index, count,
contextIndex, contextCount, isRtl, advances, advancesIndex);
}
final float oldSize = getTextSize();
setTextSize(oldSize * mCompatScaling);
float res = native_getTextRunAdvances(mNativePaint, mNativeTypeface, chars, index, count,
contextIndex, contextCount, isRtl, advances, advancesIndex);
setTextSize(oldSize);
if (advances != null) {
for (int i = advancesIndex, e = i + count; i < e; i++) {
advances[i] *= mInvCompatScaling;
}
}
return res * mInvCompatScaling; // assume errors are not significant
}
/**
* Convenience overload that takes a CharSequence instead of a
* String.
*
* @see #getTextRunAdvances(String, int, int, int, int, int, float[], int)
* @hide
*/
public float getTextRunAdvances(CharSequence text, int start, int end,
int contextStart, int contextEnd, boolean isRtl, float[] advances,
int advancesIndex) {
if (text == null) {
throw new IllegalArgumentException("text cannot be null");
}
if ((start | end | contextStart | contextEnd | advancesIndex | (end - start)
| (start - contextStart) | (contextEnd - end)
| (text.length() - contextEnd)
| (advances == null ? 0 :
(advances.length - advancesIndex - (end - start)))) < 0) {
throw new IndexOutOfBoundsException();
}
if (text instanceof String) {
return getTextRunAdvances((String) text, start, end,
contextStart, contextEnd, isRtl, advances, advancesIndex);
}
if (text instanceof SpannedString ||
text instanceof SpannableString) {
return getTextRunAdvances(text.toString(), start, end,
contextStart, contextEnd, isRtl, advances, advancesIndex);
}
if (text instanceof GraphicsOperations) {
return ((GraphicsOperations) text).getTextRunAdvances(start, end,
contextStart, contextEnd, isRtl, advances, advancesIndex, this);
}
if (text.length() == 0 || end == start) {
return 0f;
}
int contextLen = contextEnd - contextStart;
int len = end - start;
char[] buf = TemporaryBuffer.obtain(contextLen);
TextUtils.getChars(text, contextStart, contextEnd, buf, 0);
float result = getTextRunAdvances(buf, start - contextStart, len,
0, contextLen, isRtl, advances, advancesIndex);
TemporaryBuffer.recycle(buf);
return result;
}
/**
* Returns the total advance width for the characters in the run
* between start and end, and if advances is not null, the advance
* assigned to each of these characters (java chars).
*
* <p>The trailing surrogate in a valid surrogate pair is assigned
* an advance of 0. Thus the number of returned advances is
* always equal to count, not to the number of unicode codepoints
* represented by the run.
*
* <p>In the case of conjuncts or combining marks, the total
* advance is assigned to the first logical character, and the
* following characters are assigned an advance of 0.
*
* <p>This generates the sum of the advances of glyphs for
* characters in a reordered cluster as the width of the first
* logical character in the cluster, and 0 for the widths of all
* other characters in the cluster. In effect, such clusters are
* treated like conjuncts.
*
* <p>The shaping bounds limit the amount of context available
* outside start and end that can be used for shaping analysis.
* These bounds typically reflect changes in bidi level or font
* metrics across which shaping does not occur.
*
* @param text the text to measure. Cannot be null.
* @param start the index of the first character to measure
* @param end the index past the last character to measure
* @param contextStart the index of the first character to use for shaping context,
* must be <= start
* @param contextEnd the index past the last character to use for shaping context,
* must be >= end
* @param isRtl whether the run is in RTL direction
* @param advances array to receive the advances, must have room for all advances,
* can be null if only total advance is needed
* @param advancesIndex the position in advances at which to put the
* advance corresponding to the character at start
* @return the total advance
*
* @hide
*/
public float getTextRunAdvances(String text, int start, int end, int contextStart,
int contextEnd, boolean isRtl, float[] advances, int advancesIndex) {
if (text == null) {
throw new IllegalArgumentException("text cannot be null");
}
if ((start | end | contextStart | contextEnd | advancesIndex | (end - start)
| (start - contextStart) | (contextEnd - end)
| (text.length() - contextEnd)
| (advances == null ? 0 :
(advances.length - advancesIndex - (end - start)))) < 0) {
throw new IndexOutOfBoundsException();
}
if (text.length() == 0 || start == end) {
return 0f;
}
if (!mHasCompatScaling) {
return native_getTextRunAdvances(mNativePaint, mNativeTypeface, text, start, end,
contextStart, contextEnd, isRtl, advances, advancesIndex);
}
final float oldSize = getTextSize();
setTextSize(oldSize * mCompatScaling);
float totalAdvance = native_getTextRunAdvances(mNativePaint, mNativeTypeface, text, start, end,
contextStart, contextEnd, isRtl, advances, advancesIndex);
setTextSize(oldSize);
if (advances != null) {
for (int i = advancesIndex, e = i + (end - start); i < e; i++) {
advances[i] *= mInvCompatScaling;
}
}
return totalAdvance * mInvCompatScaling; // assume errors are insignificant
}
/**
* Returns the next cursor position in the run. This avoids placing the
* cursor between surrogates, between characters that form conjuncts,
* between base characters and combining marks, or within a reordering
* cluster.
*
* <p>ContextStart and offset are relative to the start of text.
* The context is the shaping context for cursor movement, generally
* the bounds of the metric span enclosing the cursor in the direction of
* movement.
*
* <p>If cursorOpt is {@link #CURSOR_AT} and the offset is not a valid
* cursor position, this returns -1. Otherwise this will never return a
* value before contextStart or after contextStart + contextLength.
*
* @param text the text
* @param contextStart the start of the context
* @param contextLength the length of the context
* @param dir either {@link #DIRECTION_RTL} or {@link #DIRECTION_LTR}
* @param offset the cursor position to move from
* @param cursorOpt how to move the cursor, one of {@link #CURSOR_AFTER},
* {@link #CURSOR_AT_OR_AFTER}, {@link #CURSOR_BEFORE},
* {@link #CURSOR_AT_OR_BEFORE}, or {@link #CURSOR_AT}
* @return the offset of the next position, or -1
* @hide
*/
public int getTextRunCursor(char[] text, int contextStart, int contextLength,
int dir, int offset, int cursorOpt) {
int contextEnd = contextStart + contextLength;
if (((contextStart | contextEnd | offset | (contextEnd - contextStart)
| (offset - contextStart) | (contextEnd - offset)
| (text.length - contextEnd) | cursorOpt) < 0)
|| cursorOpt > CURSOR_OPT_MAX_VALUE) {
throw new IndexOutOfBoundsException();
}
return native_getTextRunCursor(mNativePaint, text,
contextStart, contextLength, dir, offset, cursorOpt);
}
/**
* Returns the next cursor position in the run. This avoids placing the
* cursor between surrogates, between characters that form conjuncts,
* between base characters and combining marks, or within a reordering
* cluster.
*
* <p>ContextStart, contextEnd, and offset are relative to the start of
* text. The context is the shaping context for cursor movement, generally
* the bounds of the metric span enclosing the cursor in the direction of
* movement.
*
* <p>If cursorOpt is {@link #CURSOR_AT} and the offset is not a valid
* cursor position, this returns -1. Otherwise this will never return a
* value before contextStart or after contextEnd.
*
* @param text the text
* @param contextStart the start of the context
* @param contextEnd the end of the context
* @param dir either {@link #DIRECTION_RTL} or {@link #DIRECTION_LTR}
* @param offset the cursor position to move from
* @param cursorOpt how to move the cursor, one of {@link #CURSOR_AFTER},
* {@link #CURSOR_AT_OR_AFTER}, {@link #CURSOR_BEFORE},
* {@link #CURSOR_AT_OR_BEFORE}, or {@link #CURSOR_AT}
* @return the offset of the next position, or -1
* @hide
*/
public int getTextRunCursor(CharSequence text, int contextStart,
int contextEnd, int dir, int offset, int cursorOpt) {
if (text instanceof String || text instanceof SpannedString ||
text instanceof SpannableString) {
return getTextRunCursor(text.toString(), contextStart, contextEnd,
dir, offset, cursorOpt);
}
if (text instanceof GraphicsOperations) {
return ((GraphicsOperations) text).getTextRunCursor(
contextStart, contextEnd, dir, offset, cursorOpt, this);
}
int contextLen = contextEnd - contextStart;
char[] buf = TemporaryBuffer.obtain(contextLen);
TextUtils.getChars(text, contextStart, contextEnd, buf, 0);
int result = getTextRunCursor(buf, 0, contextLen, dir, offset - contextStart, cursorOpt);
TemporaryBuffer.recycle(buf);
return result;
}
/**
* Returns the next cursor position in the run. This avoids placing the
* cursor between surrogates, between characters that form conjuncts,
* between base characters and combining marks, or within a reordering
* cluster.
*
* <p>ContextStart, contextEnd, and offset are relative to the start of
* text. The context is the shaping context for cursor movement, generally
* the bounds of the metric span enclosing the cursor in the direction of
* movement.
*
* <p>If cursorOpt is {@link #CURSOR_AT} and the offset is not a valid
* cursor position, this returns -1. Otherwise this will never return a
* value before contextStart or after contextEnd.
*
* @param text the text
* @param contextStart the start of the context
* @param contextEnd the end of the context
* @param dir either {@link #DIRECTION_RTL} or {@link #DIRECTION_LTR}
* @param offset the cursor position to move from
* @param cursorOpt how to move the cursor, one of {@link #CURSOR_AFTER},
* {@link #CURSOR_AT_OR_AFTER}, {@link #CURSOR_BEFORE},
* {@link #CURSOR_AT_OR_BEFORE}, or {@link #CURSOR_AT}
* @return the offset of the next position, or -1
* @hide
*/
public int getTextRunCursor(String text, int contextStart, int contextEnd,
int dir, int offset, int cursorOpt) {
if (((contextStart | contextEnd | offset | (contextEnd - contextStart)
| (offset - contextStart) | (contextEnd - offset)
| (text.length() - contextEnd) | cursorOpt) < 0)
|| cursorOpt > CURSOR_OPT_MAX_VALUE) {
throw new IndexOutOfBoundsException();
}
return native_getTextRunCursor(mNativePaint, text,
contextStart, contextEnd, dir, offset, cursorOpt);
}
/**
* Return the path (outline) for the specified text.
* Note: just like Canvas.drawText, this will respect the Align setting in
* the paint.
*
* @param text The text to retrieve the path from
* @param index The index of the first character in text
* @param count The number of characterss starting with index
* @param x The x coordinate of the text's origin
* @param y The y coordinate of the text's origin
* @param path The path to receive the data describing the text. Must
* be allocated by the caller.
*/
public void getTextPath(char[] text, int index, int count,
float x, float y, Path path) {
if ((index | count) < 0 || index + count > text.length) {
throw new ArrayIndexOutOfBoundsException();
}
native_getTextPath(mNativePaint, mNativeTypeface, mBidiFlags, text, index, count, x, y,
path.ni());
}
/**
* Return the path (outline) for the specified text.
* Note: just like Canvas.drawText, this will respect the Align setting
* in the paint.
*
* @param text The text to retrieve the path from
* @param start The first character in the text
* @param end 1 past the last charcter in the text
* @param x The x coordinate of the text's origin
* @param y The y coordinate of the text's origin
* @param path The path to receive the data describing the text. Must
* be allocated by the caller.
*/
public void getTextPath(String text, int start, int end,
float x, float y, Path path) {
if ((start | end | (end - start) | (text.length() - end)) < 0) {
throw new IndexOutOfBoundsException();
}
native_getTextPath(mNativePaint, mNativeTypeface, mBidiFlags, text, start, end, x, y,
path.ni());
}
/**
* Return in bounds (allocated by the caller) the smallest rectangle that
* encloses all of the characters, with an implied origin at (0,0).
*
* @param text String to measure and return its bounds
* @param start Index of the first char in the string to measure
* @param end 1 past the last char in the string measure
* @param bounds Returns the unioned bounds of all the text. Must be
* allocated by the caller.
*/
public void getTextBounds(String text, int start, int end, Rect bounds) {
if ((start | end | (end - start) | (text.length() - end)) < 0) {
throw new IndexOutOfBoundsException();
}
if (bounds == null) {
throw new NullPointerException("need bounds Rect");
}
nativeGetStringBounds(mNativePaint, mNativeTypeface, text, start, end, mBidiFlags, bounds);
}
/**
* Return in bounds (allocated by the caller) the smallest rectangle that
* encloses all of the characters, with an implied origin at (0,0).
*
* @param text Array of chars to measure and return their unioned bounds
* @param index Index of the first char in the array to measure
* @param count The number of chars, beginning at index, to measure
* @param bounds Returns the unioned bounds of all the text. Must be
* allocated by the caller.
*/
public void getTextBounds(char[] text, int index, int count, Rect bounds) {
if ((index | count) < 0 || index + count > text.length) {
throw new ArrayIndexOutOfBoundsException();
}
if (bounds == null) {
throw new NullPointerException("need bounds Rect");
}
nativeGetCharArrayBounds(mNativePaint, mNativeTypeface, text, index, count, mBidiFlags,
bounds);
}
@Override
protected void finalize() throws Throwable {
try {
finalizer(mNativePaint);
} finally {
super.finalize();
}
}
private static native long native_init();
private static native long native_initWithPaint(long paint);
private static native void native_reset(long native_object);
private static native void native_set(long native_dst, long native_src);
private static native int native_getStyle(long native_object);
private static native void native_setStyle(long native_object, int style);
private static native int native_getStrokeCap(long native_object);
private static native void native_setStrokeCap(long native_object, int cap);
private static native int native_getStrokeJoin(long native_object);
private static native void native_setStrokeJoin(long native_object,
int join);
private static native boolean native_getFillPath(long native_object,
long src, long dst);
private static native long native_setShader(long native_object, long shader);
private static native long native_setColorFilter(long native_object,
long filter);
private static native long native_setXfermode(long native_object,
long xfermode);
private static native long native_setPathEffect(long native_object,
long effect);
private static native long native_setMaskFilter(long native_object,
long maskfilter);
private static native long native_setTypeface(long native_object,
long typeface);
private static native long native_setRasterizer(long native_object,
long rasterizer);
private static native int native_getTextAlign(long native_object);
private static native void native_setTextAlign(long native_object,
int align);
private static native void native_setTextLocale(long native_object,
String locale);
private static native int native_getTextWidths(long native_object, long native_typeface,
char[] text, int index, int count, int bidiFlags, float[] widths);
private static native int native_getTextWidths(long native_object, long native_typeface,
String text, int start, int end, int bidiFlags, float[] widths);
private static native int native_getTextGlyphs(long native_object,
String text, int start, int end, int contextStart, int contextEnd,
int flags, char[] glyphs);
private static native float native_getTextRunAdvances(long native_object, long native_typeface,
char[] text, int index, int count, int contextIndex, int contextCount,
boolean isRtl, float[] advances, int advancesIndex);
private static native float native_getTextRunAdvances(long native_object, long native_typeface,
String text, int start, int end, int contextStart, int contextEnd,
boolean isRtl, float[] advances, int advancesIndex);
private native int native_getTextRunCursor(long native_object, char[] text,
int contextStart, int contextLength, int dir, int offset, int cursorOpt);
private native int native_getTextRunCursor(long native_object, String text,
int contextStart, int contextEnd, int dir, int offset, int cursorOpt);
private static native void native_getTextPath(long native_object, long native_typeface,
int bidiFlags, char[] text, int index, int count, float x, float y, long path);
private static native void native_getTextPath(long native_object, long native_typeface,
int bidiFlags, String text, int start, int end, float x, float y, long path);
private static native void nativeGetStringBounds(long nativePaint, long native_typeface,
String text, int start, int end, int bidiFlags, Rect bounds);
private static native void nativeGetCharArrayBounds(long nativePaint, long native_typeface,
char[] text, int index, int count, int bidiFlags, Rect bounds);
private static native void finalizer(long nativePaint);
private static native void native_setShadowLayer(long native_object,
float radius, float dx, float dy, int color);
private static native boolean native_hasShadowLayer(long native_object);
private static native float native_getLetterSpacing(long native_object);
private static native void native_setLetterSpacing(long native_object,
float letterSpacing);
private static native void native_setFontFeatureSettings(long native_object,
String settings);
}
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