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Diffstat (limited to 'awt/com/android/internal/awt/AndroidImageDecoder.java')
| -rw-r--r-- | awt/com/android/internal/awt/AndroidImageDecoder.java | 274 |
1 files changed, 0 insertions, 274 deletions
diff --git a/awt/com/android/internal/awt/AndroidImageDecoder.java b/awt/com/android/internal/awt/AndroidImageDecoder.java deleted file mode 100644 index 81b2e1a..0000000 --- a/awt/com/android/internal/awt/AndroidImageDecoder.java +++ /dev/null @@ -1,274 +0,0 @@ -/* - * Copyright 2007, 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 com.android.internal.awt; - -import android.graphics.Bitmap; -import android.graphics.BitmapFactory; - -import java.awt.Transparency; -import java.awt.color.ColorSpace; -//import java.awt.image.BufferedImage; -import java.awt.image.ColorModel; -import java.awt.image.ComponentColorModel; -import java.awt.image.DataBuffer; -import java.awt.image.DirectColorModel; -import java.awt.image.ImageConsumer; -import java.awt.image.IndexColorModel; -import java.io.IOException; -import java.io.InputStream; -import java.util.Hashtable; - -import org.apache.harmony.awt.gl.image.DecodingImageSource; -import org.apache.harmony.awt.gl.image.ImageDecoder; -import org.apache.harmony.awt.internal.nls.Messages; - -public class AndroidImageDecoder extends ImageDecoder { - - private static final int hintflags = - ImageConsumer.SINGLEFRAME | // PNG is a static image - ImageConsumer.TOPDOWNLEFTRIGHT | // This order is only one possible - ImageConsumer.COMPLETESCANLINES; // Don't deliver incomplete scanlines - - // Each pixel is a grayscale sample. - private static final int PNG_COLOR_TYPE_GRAY = 0; - // Each pixel is an R,G,B triple. - private static final int PNG_COLOR_TYPE_RGB = 2; - // Each pixel is a palette index, a PLTE chunk must appear. - private static final int PNG_COLOR_TYPE_PLTE = 3; - // Each pixel is a grayscale sample, followed by an alpha sample. - private static final int PNG_COLOR_TYPE_GRAY_ALPHA = 4; - // Each pixel is an R,G,B triple, followed by an alpha sample. - private static final int PNG_COLOR_TYPE_RGBA = 6; - - private static final int NB_OF_LINES_PER_CHUNK = 1; // 0 = full image - - Bitmap bm; // The image as decoded by Android - - // Header information - int imageWidth; // Image size - int imageHeight; - int colorType; // One of the PNG_ constants from above - int bitDepth; // Number of bits per color - byte cmap[]; // The color palette for index color models - ColorModel model; // The corresponding AWT color model - - boolean transferInts; // Is transfer of type int or byte? - int dataElementsPerPixel; - - // Buffers for decoded image data - byte byteOut[]; - int intOut[]; - - - public AndroidImageDecoder(DecodingImageSource src, InputStream is) { - super(src, is); - dataElementsPerPixel = 1; - } - - @Override - /** - * All the decoding is done in Android - * - * AWT???: Method returns only once the image is completly - * decoded; decoding is not done asynchronously - */ - public void decodeImage() throws IOException { - try { - bm = BitmapFactory.decodeStream(inputStream); - if (bm == null) { - throw new IOException("Input stream empty and no image cached"); - } - - // Check size - imageWidth = bm.getWidth(); - imageHeight = bm.getHeight(); - if (imageWidth < 0 || imageHeight < 0 ) { - throw new RuntimeException("Illegal image size: " - + imageWidth + ", " + imageHeight); - } - - // We got the image fully decoded; now send all image data to AWT - setDimensions(imageWidth, imageHeight); - model = createColorModel(); - setColorModel(model); - setHints(hintflags); - setProperties(new Hashtable<Object, Object>()); // Empty - sendPixels(NB_OF_LINES_PER_CHUNK != 0 ? NB_OF_LINES_PER_CHUNK : imageHeight); - imageComplete(ImageConsumer.STATICIMAGEDONE); - } catch (IOException e) { - throw e; - } catch (RuntimeException e) { - imageComplete(ImageConsumer.IMAGEERROR); - throw e; - } finally { - closeStream(); - } - } - - /** - * Create the AWT color model - * - * ???AWT: Android Bitmaps are always of type: ARGB-8888-Direct color model - * - * However, we leave the code here for a more powerfull decoder - * that returns a native model, and the conversion is then handled - * in AWT. With such a decoder, we would need to get the colorType, - * the bitDepth, (and the color palette for an index color model) - * from the image and construct the correct color model here. - */ - private ColorModel createColorModel() { - ColorModel cm = null; - int bmModel = 5; // TODO This doesn't exist: bm.getColorModel(); - cmap = null; - - switch (bmModel) { - // A1_MODEL - case 1: - colorType = PNG_COLOR_TYPE_GRAY; - bitDepth = 1; - break; - - // A8_MODEL - case 2: - colorType = PNG_COLOR_TYPE_GRAY_ALPHA; - bitDepth = 8; - break; - - // INDEX8_MODEL - // RGB_565_MODEL - // ARGB_8888_MODEL - case 3: - case 4: - case 5: - colorType = bm.hasAlpha() ? PNG_COLOR_TYPE_RGBA : PNG_COLOR_TYPE_RGB; - bitDepth = 8; - break; - - default: - // awt.3C=Unknown PNG color type - throw new IllegalArgumentException(Messages.getString("awt.3C")); //$NON-NLS-1$ - } - - switch (colorType) { - - case PNG_COLOR_TYPE_GRAY: { - if (bitDepth != 8 && bitDepth != 4 && bitDepth != 2 && bitDepth != 1) { - // awt.3C=Unknown PNG color type - throw new IllegalArgumentException(Messages.getString("awt.3C")); //$NON-NLS-1$ - } - - // Create gray color model - int numEntries = 1 << bitDepth; - int scaleFactor = 255 / (numEntries-1); - byte comps[] = new byte[numEntries]; - for (int i = 0; i < numEntries; i++) { - comps[i] = (byte) (i * scaleFactor); - } - cm = new IndexColorModel(bitDepth, numEntries, comps, comps, comps); - - transferInts = false; - break; - } - - case PNG_COLOR_TYPE_RGB: { - if (bitDepth != 8) { - // awt.3C=Unknown PNG color type - throw new IllegalArgumentException(Messages.getString("awt.3C")); //$NON-NLS-1$ - } - - cm = new DirectColorModel(24, 0xff0000, 0xFF00, 0xFF); - - transferInts = true; - break; - } - - case PNG_COLOR_TYPE_PLTE: { - if (bitDepth != 8 && bitDepth != 4 && bitDepth != 2 && bitDepth != 1) { - // awt.3C=Unknown PNG color type - throw new IllegalArgumentException(Messages.getString("awt.3C")); //$NON-NLS-1$ - } - - if (cmap == null) { - throw new IllegalStateException("Palette color type is not supported"); - } - - cm = new IndexColorModel(bitDepth, cmap.length / 3, cmap, 0, false); - - transferInts = false; - break; - } - - case PNG_COLOR_TYPE_GRAY_ALPHA: { - if (bitDepth != 8) { - // awt.3C=Unknown PNG color type - throw new IllegalArgumentException(Messages.getString("awt.3C")); //$NON-NLS-1$ - } - - cm = new ComponentColorModel(ColorSpace.getInstance(ColorSpace.CS_GRAY), - true, false, - Transparency.TRANSLUCENT, - DataBuffer.TYPE_BYTE); - - transferInts = false; - dataElementsPerPixel = 2; - break; - } - - case PNG_COLOR_TYPE_RGBA: { - if (bitDepth != 8) { - // awt.3C=Unknown PNG color type - throw new IllegalArgumentException(Messages.getString("awt.3C")); //$NON-NLS-1$ - } - - cm = ColorModel.getRGBdefault(); - - transferInts = true; - break; - } - default: - // awt.3C=Unknown PNG color type - throw new IllegalArgumentException(Messages.getString("awt.3C")); //$NON-NLS-1$ - } - - return cm; - } - - private void sendPixels(int nbOfLinesPerChunk) { - int w = imageWidth; - int h = imageHeight; - int n = 1; - if (nbOfLinesPerChunk > 0 && nbOfLinesPerChunk <= h) { - n = nbOfLinesPerChunk; - } - - if (transferInts) { - // Create output buffer - intOut = new int[w * n]; - for (int yi = 0; yi < h; yi += n) { - // Last chunk might contain less liness - if (n > 1 && h - yi < n ) { - n = h - yi; - } - bm.getPixels(intOut, 0, w, 0, yi, w, n); - setPixels(0, yi, w, n, model, intOut, 0, w); - } - } else { - // Android bitmaps always store ints (ARGB-8888 direct model) - throw new RuntimeException("Byte transfer not supported"); - } - } - -} |