diff options
Diffstat (limited to 'graphics')
| -rw-r--r-- | graphics/java/android/graphics/Canvas.java | 137 | ||||
| -rw-r--r-- | graphics/java/android/graphics/Paint.java | 95 |
2 files changed, 210 insertions, 22 deletions
diff --git a/graphics/java/android/graphics/Canvas.java b/graphics/java/android/graphics/Canvas.java index 345f810..064fab6 100644 --- a/graphics/java/android/graphics/Canvas.java +++ b/graphics/java/android/graphics/Canvas.java @@ -16,11 +16,10 @@ package android.graphics; -import android.text.TextUtils; -import android.text.SpannedString; -import android.text.SpannableString; import android.text.GraphicsOperations; -import android.util.DisplayMetrics; +import android.text.SpannableString; +import android.text.SpannedString; +import android.text.TextUtils; import javax.microedition.khronos.opengles.GL; @@ -59,6 +58,18 @@ public class Canvas { private int mSurfaceFormat; /** + * Flag for drawTextRun indicating left-to-right run direction. + * @hide + */ + public static final int DIRECTION_LTR = 0; + + /** + * Flag for drawTextRun indicating right-to-left run direction. + * @hide + */ + public static final int DIRECTION_RTL = 1; + + /** * Construct an empty raster canvas. Use setBitmap() to specify a bitmap to * draw into. The initial target density is {@link Bitmap#DENSITY_NONE}; * this will typically be replaced when a target bitmap is set for the @@ -1246,8 +1257,8 @@ public class Canvas { (text.length - index - count)) < 0) { throw new IndexOutOfBoundsException(); } - native_drawText(mNativeCanvas, text, index, count, x, y, - paint.mNativePaint); + native_drawText(mNativeCanvas, text, index, count, x, y, paint.mBidiFlags, + paint.mNativePaint); } /** @@ -1259,7 +1270,10 @@ public class Canvas { * @param y The y-coordinate of the origin of the text being drawn * @param paint The paint used for the text (e.g. color, size, style) */ - public native void drawText(String text, float x, float y, Paint paint); + public void drawText(String text, float x, float y, Paint paint) { + native_drawText(mNativeCanvas, text, 0, text.length(), x, y, paint.mBidiFlags, + paint.mNativePaint); + } /** * Draw the text, with origin at (x,y), using the specified paint. @@ -1277,8 +1291,8 @@ public class Canvas { if ((start | end | (end - start) | (text.length() - end)) < 0) { throw new IndexOutOfBoundsException(); } - native_drawText(mNativeCanvas, text, start, end, x, y, - paint.mNativePaint); + native_drawText(mNativeCanvas, text, start, end, x, y, paint.mBidiFlags, + paint.mNativePaint); } /** @@ -1299,16 +1313,100 @@ public class Canvas { if (text instanceof String || text instanceof SpannedString || text instanceof SpannableString) { native_drawText(mNativeCanvas, text.toString(), start, end, x, y, - paint.mNativePaint); - } - else if (text instanceof GraphicsOperations) { + paint.mBidiFlags, paint.mNativePaint); + } else if (text instanceof GraphicsOperations) { ((GraphicsOperations) text).drawText(this, start, end, x, y, paint); + } else { + char[] buf = TemporaryBuffer.obtain(end - start); + TextUtils.getChars(text, start, end, buf, 0); + native_drawText(mNativeCanvas, buf, 0, end - start, x, y, + paint.mBidiFlags, paint.mNativePaint); + TemporaryBuffer.recycle(buf); } - else { + } + + /** + * Render a run of all LTR or all RTL text, with shaping. This does not run + * bidi on the provided text, but renders it as a uniform right-to-left or + * left-to-right run, as indicated by dir. Alignment of the text is as + * determined by the Paint's TextAlign value. + * + * @param text the text to render + * @param index the start of the text to render. Data before this position + * can be used for shaping context. + * @param length the length of the text to render. Data at or after this + * position (start + length) can be used for shaping context. + * @param x the x position at which to draw the text + * @param y the y position at which to draw the text + * @param dir the run direction, either {@link DIRECTION_LTR} or + * {@link DIRECTION_RTL}. + * @param paint the paint + * @hide + */ + public void drawTextRun(char[] text, int index, int length, float x, float y, int dir, + Paint paint) { + + if (text == null) { + throw new NullPointerException("text is null"); + } + if (paint == null) { + throw new NullPointerException("paint is null"); + } + if ((index | length | text.length - index - length) < 0) { + throw new IndexOutOfBoundsException(); + } + if (dir != DIRECTION_LTR && dir != DIRECTION_RTL) { + throw new IllegalArgumentException("unknown dir: " + dir); + } + + native_drawTextRun(mNativeCanvas, text, index, length, x, y, dir, paint.mNativePaint); + } + + /** + * Render a run of all LTR or all RTL text, with shaping. This does not run + * bidi on the provided text, but renders it as a uniform right-to-left or + * left-to-right run, as indicated by dir. Alignment of the text is as + * determined by the Paint's TextAlign value. + * + * @param text the text to render + * @param start the start of the text to render. Data before this position + * can be used for shaping context. + * @param end the end of the text to render. Data at or after this + * position can be used for shaping context. + * @param x the x position at which to draw the text + * @param y the y position at which to draw the text + * @param dir the run direction, either 0 for LTR or 1 for RTL. + * @param paint the paint + * @hide + */ + public void drawTextRun(CharSequence text, int start, int end, float x, + float y, int dir, Paint paint) { + + if (text == null) { + throw new NullPointerException("text is null"); + } + if (paint == null) { + throw new NullPointerException("paint is null"); + } + if ((start | end | end - start | text.length() - end) < 0) { + throw new IndexOutOfBoundsException(); + } + + int flags = dir == 0 ? 0 : 1; + + if (text instanceof String || text instanceof SpannedString || + text instanceof SpannableString) { + native_drawTextRun(mNativeCanvas, text.toString(), start, end, x, y, + flags, paint.mNativePaint); + } else if (text instanceof GraphicsOperations) { + ((GraphicsOperations) text).drawTextRun(this, start, end, x, y, flags, + paint); + } else { char[] buf = TemporaryBuffer.obtain(end - start); TextUtils.getChars(text, start, end, buf, 0); - drawText(buf, 0, end - start, x, y, paint); + native_drawTextRun(mNativeCanvas, buf, 0, end - start, x, y, + flags, paint.mNativePaint); TemporaryBuffer.recycle(buf); } } @@ -1555,10 +1653,17 @@ public class Canvas { private static native void native_drawText(int nativeCanvas, char[] text, int index, int count, float x, - float y, int paint); + float y, int flags, int paint); private static native void native_drawText(int nativeCanvas, String text, int start, int end, float x, - float y, int paint); + float y, int flags, int paint); + + private static native void native_drawTextRun(int nativeCanvas, String + text, int start, int end, float x, float y, int flags, int paint); + + private static native void native_drawTextRun(int nativeCanvas, char[] + text, int start, int len, float x, float y, int flags, int paint); + private static native void native_drawPosText(int nativeCanvas, char[] text, int index, int count, float[] pos, diff --git a/graphics/java/android/graphics/Paint.java b/graphics/java/android/graphics/Paint.java index 183c896..b564929 100644 --- a/graphics/java/android/graphics/Paint.java +++ b/graphics/java/android/graphics/Paint.java @@ -16,10 +16,10 @@ package android.graphics; -import android.text.TextUtils; +import android.text.GraphicsOperations; import android.text.SpannableString; import android.text.SpannedString; -import android.text.GraphicsOperations; +import android.text.TextUtils; /** * The Paint class holds the style and color information about how to draw @@ -39,6 +39,7 @@ public class Paint { private boolean mHasCompatScaling; private float mCompatScaling; private float mInvCompatScaling; + /* package */ int mBidiFlags = BIDI_DEFAULT_LTR; private static final Style[] sStyleArray = { Style.FILL, Style.STROKE, Style.FILL_AND_STROKE @@ -76,8 +77,64 @@ public class Paint { private static final int DEFAULT_PAINT_FLAGS = DEV_KERN_TEXT_FLAG; /** - * The Style specifies if the primitive being drawn is filled, - * stroked, or both (in the same color). The default is FILL. + * 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; + + /** + * The Style specifies if the primitive being drawn is filled, stroked, or + * both (in the same color). The default is FILL. */ public enum Style { /** @@ -210,6 +267,7 @@ public class Paint { mHasCompatScaling = paint.mHasCompatScaling; mCompatScaling = paint.mCompatScaling; mInvCompatScaling = paint.mInvCompatScaling; + mBidiFlags = paint.mBidiFlags; } /** Restores the paint to its default settings. */ @@ -218,6 +276,7 @@ public class Paint { setFlags(DEFAULT_PAINT_FLAGS); mHasCompatScaling = false; mCompatScaling = mInvCompatScaling = 1; + mBidiFlags = BIDI_DEFAULT_LTR; } /** @@ -240,6 +299,7 @@ public class Paint { mHasCompatScaling = src.mHasCompatScaling; mCompatScaling = src.mCompatScaling; mInvCompatScaling = src.mInvCompatScaling; + mBidiFlags = src.mBidiFlags; } } @@ -254,10 +314,33 @@ public class Paint { 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(); |