android svg 的源码资源

package com.libsvg; /** * * @author Pavel.B.Chernov (based on ideas of kushnarev) * */ import com.ImageViewSvg.R; import android.graphics.drawable.Drawable; import android.content.res.Resources; import android.content.res.TypedArray; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.ColorFilter; import android.graphics.Paint; import android.graphics.PixelFormat; import android.graphics.Rect; import android.util.AttributeSet; import android.view.Gravity; import android.widget.ImageView; import org.apache.http.util.EncodingUtils; import org.xmlpull.v1.XmlPullParser; import org.xmlpull.v1.XmlPullParserException; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; /** * A Drawable that wraps an Svg image and can be stretched or aligned. You can create a * SvgDrawable from a file path, an input stream, through XML inflation. * <p>It can be defined in an XML file with the <code>&lt;com.libsvg.SvgDrawable></code> element.</p> * <p> * Also see the {@link com.libsvg.SvgImageView} class, which cares about loading and operating * with svg graphics inside view container. * </p> * * @attr ref android.R.styleable#SvgDrawable_src * @attr ref android.R.styleable#SvgDrawable_antialias * @attr ref android.R.styleable#SvgDrawable_filter * @attr ref android.R.styleable#SvgDrawable_dither * @attr ref android.R.styleable#SvgDrawable_gravity */ public class SvgDrawable extends Drawable { private static final int DEFAULT_PAINT_FLAGS = Paint.FILTER_BITMAP_FLAG | Paint.DITHER_FLAG; // Load native libraries static { System.loadLibrary("svgandroid"); } // libsvg-android rasterizer id private long mSvgId; private Bitmap mBitmap; private int mGravity = Gravity.FILL; private Paint mPaint = new Paint(DEFAULT_PAINT_FLAGS); // These are scaled to match the target density. private int mWidth = -1; private int mHeight = -1; private double mOriginalAspectRatio = 1.0; private final Rect mDstRect = new Rect(); // Gravity.apply() sets this private boolean mApplyGravity; private ImageView.ScaleType mScaleType = ImageView.ScaleType.FIT_CENTER; // TODO // Native libsvgandroid SHOULD USE this value to calculate width and height in pixels // Because size in SVG image can be written in mm, cm, inches, feets .... private float mRealDPI = 0; /** * Creates a new SvgDrawable object and loads SVG by resource ID */ static public SvgDrawable getDrawable(Resources res, int id) { InputStream inStream = res.openRawResource(id); if (inStream == null) { return null; } SvgDrawable obj = new SvgDrawable(res, inStream); return obj; } /** * Create an empty drawable, not dealing with density. * @deprecated Use {@link #SvgDrawable(Resources)} to ensure * that the drawable has correctly set its target density. */ @Deprecated public SvgDrawable() { } /** * Create an empty drawable. */ public SvgDrawable(Resources res) { if (res != null) { mRealDPI = (res.getDisplayMetrics().xdpi + res.getDisplayMetrics().ydpi) / 2; } } /** * Create a drawable by opening a given file path and decoding the SVG. * @throws FileNotFoundException * @deprecated Use {@link #SvgDrawable(Resources, String)} to ensure * that the drawable has correctly set its target density. */ @Deprecated public SvgDrawable(String filepath) throws FileNotFoundException { FileInputStream f = new FileInputStream(filepath); LoadSvg(null, f); } /** * Create a drawable by opening a given file path and decoding the bitmap. * @throws FileNotFoundException */ public SvgDrawable(Resources res, String filepath) throws FileNotFoundException { FileInputStream f = new FileInputStream(filepath); LoadSvg(res, f); } /** * Create a drawable by decoding SVG from the given input stream. * @deprecated Use {@link #SvgDrawable(Resources, java.io.InputStream)} to ensure * that the drawable has correctly set its target density. */ @Deprecated public SvgDrawable(java.io.InputStream is) { LoadSvg(null, is); } /** * Create a drawable by decoding a bitmap from the given input stream. */ public SvgDrawable(Resources res, java.io.InputStream is) { LoadSvg(res, is); } /** * Decodes a drawable from the given input stream. */ public boolean LoadSvg(Resources res, java.io.InputStream is) { try { if (res != null) { // TODO mRealDPI = (res.getDisplayMetrics().xdpi + res.getDisplayMetrics().ydpi) / 2; } // Read into the buffer if (is != null) { byte[] buffer = new byte[is.available()]; is.read(buffer); is.close(); // And make a string String content = EncodingUtils.getString(buffer, "UTF-8"); buffer = null; // Parse it mSvgId = SvgRaster.svgAndroidCreate(); if (SvgRaster.svgAndroidParseBuffer(mSvgId, content) != 0) { android.util.Log.w("SvgDrawable", "SvgDrawable cannot decode " + is); } SvgRaster.svgAndroidSetAntialiasing(mSvgId, true); mWidth = SvgRaster.svgAndroidGetWidth(mSvgId); mHeight = SvgRaster.svgAndroidGetHeight(mSvgId); mOriginalAspectRatio = ((double)mWidth) / ((double)mHeight); return true; } } catch (IOException e) { e.printStackTrace(); } return false; } public final Paint getPaint() { return mPaint; } public final Bitmap getBitmap() { return mBitmap; } /** Get the gravity used to position/stretch the bitmap within its bounds. * See android.view.Gravity * @return the gravity applied to the bitmap */ public int getGravity() { return mGravity; } /** Set the gravity used to position/stretch the bitmap within its bounds. See android.view.Gravity * @param gravity the gravity */ public void setGravity(int gravity) { mApplyGravity = (mGravity != gravity); mGravity = gravity; } public void setAntiAlias(boolean aa) { com.libsvg.SvgRaster.svgAndroidSetAntialiasing(mSvgId, aa); } @Override public void setFilterBitmap(boolean filter) { mPaint.setFilterBitmap(filter); } @Override public void setDither(boolean dither) { mPaint.setDither(dither); } public void setScaleType(ImageView.ScaleType scaleType) { mScaleType = scaleType; invalidateSelf(); } /* * This is essential for correct transformation of SVG image * It is called from SvgImageView.onSizeChanged , .setImageDrawable, .setScaleType * Actual processing of scaleType is in private void ImageView.configureBounds() * But this procedure is called before that. * So we can adopt our width and height respectively to scaleType */ public void adjustToParentSize(int vWidth, int vHeight) { // Reload original width and height mWidth = SvgRaster.svgAndroidGetWidth(mSvgId); mHeight = SvgRaster.svgAndroidGetHeight(mSvgId); switch (mScaleType) { case FIT_XY: mWidth = vWidth; mHeight = vHeight; break; case CENTER: // No scaling break; case CENTER_CROP: // Scale so that both width and height of the image will be equal to or larger than view if (mWidth * vHeight > vWidth * mHeight) { mHeight = vHeight; mWidth = (int)(((double)mHeight) * mOriginalAspec