/* * Copyright (C) 2010 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 com.android.ide.common.rendering.api.LayoutLog; import com.android.layoutlib.bridge.Bridge; import com.android.layoutlib.bridge.impl.DelegateManager; import com.android.tools.layoutlib.annotations.LayoutlibDelegate; import android.graphics.Shader.TileMode; /** * Delegate implementing the native methods of android.graphics.BitmapShader * * Through the layoutlib_create tool, the original native methods of BitmapShader have been * replaced by calls to methods of the same name in this delegate class. * * This class behaves like the original native implementation, but in Java, keeping previously * native data into its own objects and mapping them to int that are sent back and forth between * it and the original BitmapShader class. * * Because this extends {@link Shader_Delegate}, there's no need to use a {@link DelegateManager}, * as all the Shader classes will be added to the manager owned by {@link Shader_Delegate}. * * @see Shader_Delegate * */ public class BitmapShader_Delegate extends Shader_Delegate { // ---- delegate data ---- private java.awt.Paint mJavaPaint; // ---- Public Helper methods ---- @Override public java.awt.Paint getJavaPaint() { return mJavaPaint; } @Override public boolean isSupported() { return true; } @Override public String getSupportMessage() { // no message since isSupported returns true; return null; } // ---- native methods ---- @LayoutlibDelegate /*package*/ static long nativeCreate(long native_bitmap, int shaderTileModeX, int shaderTileModeY) { Bitmap_Delegate bitmap = Bitmap_Delegate.getDelegate(native_bitmap); if (bitmap == null) { return 0; } BitmapShader_Delegate newDelegate = new BitmapShader_Delegate( bitmap.getImage(), Shader_Delegate.getTileMode(shaderTileModeX), Shader_Delegate.getTileMode(shaderTileModeY)); return sManager.addNewDelegate(newDelegate); } @LayoutlibDelegate /*package*/ static long nativePostCreate(long native_shader, long native_bitmap, int shaderTileModeX, int shaderTileModeY) { // pass, not needed. return 0; } // ---- Private delegate/helper methods ---- private BitmapShader_Delegate(java.awt.image.BufferedImage image, TileMode tileModeX, TileMode tileModeY) { mJavaPaint = new BitmapShaderPaint(image, tileModeX, tileModeY); } private class BitmapShaderPaint implements java.awt.Paint { private final java.awt.image.BufferedImage mImage; private final TileMode mTileModeX; private final TileMode mTileModeY; BitmapShaderPaint(java.awt.image.BufferedImage image, TileMode tileModeX, TileMode tileModeY) { mImage = image; mTileModeX = tileModeX; mTileModeY = tileModeY; } @Override public java.awt.PaintContext createContext( java.awt.image.ColorModel colorModel, java.awt.Rectangle deviceBounds, java.awt.geom.Rectangle2D userBounds, java.awt.geom.AffineTransform xform, java.awt.RenderingHints hints) { java.awt.geom.AffineTransform canvasMatrix; try { canvasMatrix = xform.createInverse(); } catch (java.awt.geom.NoninvertibleTransformException e) { Bridge.getLog().fidelityWarning(LayoutLog.TAG_MATRIX_INVERSE, "Unable to inverse matrix in BitmapShader", e, null /*data*/); canvasMatrix = new java.awt.geom.AffineTransform(); } java.awt.geom.AffineTransform localMatrix = getLocalMatrix(); try { localMatrix = localMatrix.createInverse(); } catch (java.awt.geom.NoninvertibleTransformException e) { Bridge.getLog().fidelityWarning(LayoutLog.TAG_MATRIX_INVERSE, "Unable to inverse matrix in BitmapShader", e, null /*data*/); localMatrix = new java.awt.geom.AffineTransform(); } return new BitmapShaderContext(canvasMatrix, localMatrix, colorModel); } private class BitmapShaderContext implements java.awt.PaintContext { private final java.awt.geom.AffineTransform mCanvasMatrix; private final java.awt.geom.AffineTransform mLocalMatrix; private final java.awt.image.ColorModel mColorModel; public BitmapShaderContext( java.awt.geom.AffineTransform canvasMatrix, java.awt.geom.AffineTransform localMatrix, java.awt.image.ColorModel colorModel) { mCanvasMatrix = canvasMatrix; mLocalMatrix = localMatrix; mColorModel = colorModel; } @Override public void dispose() { } @Override public java.awt.image.ColorModel getColorModel() { return mColorModel; } @Override public java.awt.image.Raster getRaster(int x, int y, int w, int h) { java.awt.image.BufferedImage image = new java.awt.image.BufferedImage(w, h, java.awt.image.BufferedImage.TYPE_INT_ARGB); int[] data = new int[w*h]; int index = 0; float[] pt1 = new float[2]; float[] pt2 = new float[2]; for (int iy = 0 ; iy < h ; iy++) { for (int ix = 0 ; ix < w ; ix++) { // handle the canvas transform pt1[0] = x + ix; pt1[1] = y + iy; mCanvasMatrix.transform(pt1, 0, pt2, 0, 1); // handle the local matrix. pt1[0] = pt2[0]; pt1[1] = pt2[1]; mLocalMatrix.transform(pt1, 0, pt2, 0, 1); data[index++] = getColor(pt2[0], pt2[1]); } } image.setRGB(0 /*startX*/, 0 /*startY*/, w, h, data, 0 /*offset*/, w /*scansize*/); return image.getRaster(); } } /** * Returns a color for an arbitrary point. */ private int getColor(float fx, float fy) { int x = getCoordinate(Math.round(fx), mImage.getWidth(), mTileModeX); int y = getCoordinate(Math.round(fy), mImage.getHeight(), mTileModeY); return mImage.getRGB(x, y); } private int getCoordinate(int i, int size, TileMode mode) { if (i < 0) { switch (mode) { case CLAMP: i = 0; break; case REPEAT: i = size - 1 - (-i % size); break; case MIRROR: // this is the same as the positive side, just make the value positive // first. i = -i; int count = i / size; i = i % size; if ((count % 2) == 1) { i = size - 1 - i; } break; } } else if (i >= size) { switch (mode) { case CLAMP: i = size - 1; break; case REPEAT: i = i % size; break; case MIRROR: int count = i / size; i = i % size; if ((count % 2) == 1) { i = size - 1 - i; } break; } } return i; } @Override public int getTransparency() { return java.awt.Paint.TRANSLUCENT; } } }