/*
*
*
* Copyright 1990-2007 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
package javax.microedition.lcdui;
import java.io.InputStream;
import java.io.IOException;
import com.sun.midp.midlet.MIDletSuite;
import com.sun.midp.midlet.MIDletStateHandler;
/**
* ImageFactory implementation based on putpixel graphics library and stores
* data on Java heap.
*/
class ImageDataFactory implements AbstractImageDataFactory {
/**
* PNG Header Data
*/
private static final byte[] pngHeader = new byte[] {
(byte)0x89, (byte)0x50, (byte)0x4e, (byte)0x47,
(byte)0x0d, (byte)0x0a, (byte)0x1a, (byte)0x0a,
(byte)0x00, (byte)0x00, (byte)0x00, (byte)0x0d,
(byte)0x49, (byte)0x48, (byte)0x44, (byte)0x52
};
/**
* JPEG Header Data
*/
private static final byte[] jpegHeader = new byte[] {
(byte)0xff, (byte)0xd8, (byte)0xff, (byte)0xe0
};
/**
* RAW Header Data
*/
private static final byte[] rawHeader = new byte[] {
(byte)0x89, (byte)0x53, (byte)0x55, (byte)0x4E
};
/**
* ImageDataFactory singleton used for <code>ImageData</code>
* creation.
*/
private static ImageDataFactory imageDataFactory =
new ImageDataFactory();
/**
* Returns the singleton <code>ImageDataFactory</code> instance.
*
* @return the singleton <code>ImageDataFactory</code> instance.
*/
public static AbstractImageDataFactory getImageDataFactory() {
return imageDataFactory;
}
/**
* Creates a new, mutable image for off-screen drawing. Every pixel
* within the newly created image is white. The width and height of the
* image must both be greater than zero.
*
* @param width the width of the new image, in pixels
* @param height the height of the new image, in pixels
* @return the created image
*/
public ImageData createOffScreenImageData(int width, int height) {
return new ImageData(width, height, true, true, false);
}
/**
* Creates an immutable <code>ImageData</code> from
* a <code>mutableSource ImageData</code>.
* If the source image data is mutable, an immutable copy is created and
* returned. If the source image data is immutable, the implementation may
* simply return it without creating a new image. If an immutable source
* image data contains transparency information,
* this information is copied to the new image data unchanged.
*
* <p> This method is useful for placing the contents of mutable images
* into <code>Choice</code> objects. The application can create
* an off-screen image
* using the
* {@link #createImage(int, int) createImage(w, h)}
* method, draw into it using a <code>Graphics</code> object
* obtained with the
* {@link #getGraphics() getGraphics()}
* method, and then create an immutable copy of it with this method.
* The immutable copy may then be placed into <code>Choice</code>
* objects. </p>
*
* @param mutableSource the source mutable image to be copied
* @return the new immutable image data
*
* @throws NullPointerException if <code>source</code> is <code>null</code>
*/
public ImageData createImmutableCopy(ImageData mutableSource) {
int width = mutableSource.getWidth();
int height = mutableSource.getHeight();
int length = width * height * 2;
return new ImageData(width, height, false,
mutableSource.getPixelData());
}
/**
* Creates an immutable <code>ImageData</code>
* from decoded image data obtained from the
* named resource. The name parameter is a resource name as defined by
* {@link Class#getResourceAsStream(String)
* Class.getResourceAsStream(name)}. The rules for resolving resource
* names are defined in the
* <a href="../../../java/lang/package-summary.html">
* Application Resource Files</a> section of the
* <code>java.lang</code> package documentation.
*
* @param name the name of the resource containing the image data in one of
* the supported image formats
* @return the created image data
* @throws NullPointerException if <code>name</code> is <code>null</code>
* @throws java.io.IOException if the resource does not exist,
* the data cannot
* be loaded, or the image data cannot be decoded
*/
public ImageData createResourceImageData(String name) throws IOException {
ImageData data = new ImageData();
/*
* Load native image data from cache and create
* image, if available. If image is not cached,
* proceed to load and create image normally.
*/
if (!loadCachedImage(data, name)) {
createImageFromStream(data,
ImageData.class.getResourceAsStream(name));
}
return data;
}
/**
* Creates an immutable <code>ImageData</code>
* which is decoded from the data stored in
* the specified byte array at the specified offset and length. The data
* must be in a self-identifying image file format supported by the
* implementation, such as <a href="#PNG">PNG</A>.
*
* <p>The <code>imageoffset</code> and <code>imagelength</code>
* parameters specify a range of
* data within the <code>imageData</code> byte array. The
* <code>imageOffset</code> parameter
* specifies the
* offset into the array of the first data byte to be used. It must
* therefore lie within the range
* <code>[0..(imageData.length-1)]</code>. The
* <code>imageLength</code>
* parameter specifies the number of data bytes to be used. It must be a
* positive integer and it must not cause the range to extend beyond
* the end
* of the array. That is, it must be true that
* <code>imageOffset + imageLength < imageData.length</code>. </p>
*
* <p> This method is intended for use when loading an
* image from a variety of sources, such as from
* persistent storage or from the network.</p>
*
* @param imageBytes the array of image data in a supported image format
* @param imageOffset the offset of the start of the data in the array
* @param imageLength the length of the data in the array
*
* @return the created image
* @throws ArrayIndexOutOfBoundsException if <code>imageOffset</code>
* and <code>imageLength</code>
* specify an invalid range
* @throws NullPointerException if <code>imageData</code> is
* <code>null</code>
* @throws IllegalArgumentException if <code>imageData</code> is incorrectly
* formatted or otherwise cannot be decoded
*/
public ImageData createImmutableImageData(byte[] imageBytes,
int imageOffset,
int imageLength) {
ImageData data = new ImageData();
// parse the pixel data
decode(data, imageBytes, imageOffset, imageLength);
return data;
}
/**
* Creates an immutable <code>ImageData</code>
* using pixel data from the specified
* region of a source <code>ImageData</code>, transformed as specified.
*
* <p>The source image dara may be mutable or immutable.
* For immutable source image data,
* transparency information, if any, is copied to the new
* image data unchanged.</p>
*
* <p>On some devices, pre-transformed images may render more quickly
* than images that are transformed on the fly using
* <code>drawRegion</code>.
* However, creating such images does consume additional heap space,
* so this technique should be applied only to images whose rendering
* speed is critical.</p>
*
* <p>The transform function used must be one of the following, as defined
* in the {@link javax.microedition.lcdui.game.Sprite Sprite} class:<br>
*
* <code>Sprite.TRANS_NONE</code> - causes the specified image
* region to be copied unchanged<br>
* <code>Sprite.TRANS_ROT90</code> - causes the specified image
* region to be rotated clockwise by 90 degrees.<br>
* <code>Sprite.TRANS_ROT180</code> - causes the specified image
* region to be rotated clockwise by 180 degrees.<br>
* <code>Sprite.TRANS_ROT270</code> - causes the specified image
* region to be rotated clockwise by 270 degrees.<br>
* <code>Sprite.TRANS_MIRROR</code> - causes the specified image
* region to be reflected about its vertical center.<br>
* <code>Sprite.TRANS_MIRROR_ROT90</code> - causes the specified image
* region to be reflected about its vertical center and then rotated
* clockwise by 90 degrees.<br>
* <code>Sprite.TRANS_MIRROR_ROT180</code> - causes the specified image
* region to be reflected about its vertical center and then rotated
* clockwise by 180 degrees.<br>
* <code>Sprite.TRANS_MIRROR_ROT270</code> - causes the specified image
* region to be reflected about its vertical center and then rotated
* clockwise by 270 degrees.<br></p>
*
* <p>
* The size of the returned image will be the size of the specified region
* with the transform applied. For example, if the region is
* <code>100 x 50</code> pixels and the transform is
* <code>TRANS_ROT90</code>, the
* returned image will be <code>50 x 100</code> pixels.</p>
*
* <p><strong>Note:</strong> If all of the following conditions
* are met, this method may
* simply return the source <code>Image</code> without creating a
* new one:</p>
* <ul>
* <li>the source image is immutable;</li>
* <li>the region represents the entire source image; and</li>
* <li>the transform is <code>TRANS_NONE</code>.</li>
* </ul>
*
* @param dataSource the source image data to be copied from
* @param x the horizontal location of the region to be copied
* @param y the vertical location of the region to be copied
* @param w the width of the region to be copied
* @param h the height of the region to be copied
* @param transform the transform to be applied to the region
* @return the new, immutable image
*
* @throws NullPointerException if <code>image</code> is <code>null</code>
* @throws IllegalArgumentException if the region to be copied exceeds
* the bounds of the source image
* @throws IllegalArgumentException if either <code>width</code> or
* <code>height</code> is zero or less
* @throws IllegalArgumentException if the <code>transform</code>
* is not valid
*
*/
public ImageData createImmutableImageData(ImageData dataSource,
int x, int y, int w, int h,
int transform) {
ImageData dataDest = null;
if ((transform & Image.TRANSFORM_SWAP_AXIS) ==
Image.TRANSFORM_SWAP_AXIS) {
dataDest = new ImageData(h, w, false, false,
dataSource.hasAlpha());
} else {
dataDest = new ImageData(w, h, false, false,
dataSource.hasAlpha());
}
// Copy either the Java or romized data to its own array
loadRegion(dataDest, dataSource, x, y, w, h, transform);
return dataDest;
}
/**
* Creates an immutable <code>ImageData</code>
* from a sequence of ARGB values, specified
* as <code>0xAARRGGBB</code>.
* The ARGB data within the <code>rgb</code> array is arranged
* horizontally from left to right within each row,
* row by row from top to bottom.
* If <code>processAlpha</code> is <code>true</code>,
* the high-order byte specifies opacity; that is,
* <code>0x00RRGGBB</code> specifies
* a fully transparent pixel and <code>0xFFRRGGBB</code> specifies
* a fully opaque
* pixel. Intermediate alpha values specify semitransparency. If the
* implementation does not support alpha blending for image rendering
* operations, it must replace any semitransparent pixels with fully
* transparent pixels. (See <a href="#alpha">Alpha Processing</a>
* for further discussion.) If <code>processAlpha</code> is
* <code>false</code>, the alpha values
* are ignored and all pixels must be treated as fully opaque.
*
* <p>Consider <code>P(a,b)</code> to be the value of the pixel
* located at column <code>a</code> and row <code>b</code> of the
* Image, where rows and columns are numbered downward from the
* top starting at zero, and columns are numbered rightward from
* the left starting at zero. This operation can then be defined
* as:</p>
*
* <TABLE BORDER="2">
* <TR>
* <TD ROWSPAN="1" COLSPAN="1">
* <pre><code>
* P(a, b) = rgb[a + b * width]; </code></pre>
* </TD>
* </TR>
* </TABLE>
* <p>for</p>
*
* <TABLE BORDER="2">
* <TR>
* <TD ROWSPAN="1" COLSPAN="1">
* <pre><code>
* 0 <= a < width
* 0 <= b < height </code></pre>
* </TD>
* </TR>
* </TABLE>
* <p> </p>
*
* @param rgb an array of ARGB values that composes the image
* @param width the width of the image
* @param height the height of the image
* @param processAlpha <code>true</code> if <code>rgb</code>
* has an alpha channel,
* <code>false</code> if all pixels are fully opaque
* @return the created <code>ImageData</code>
* @throws NullPointerException if <code>rgb</code> is <code>null</code>.
* @throws IllegalArgumentException if either <code>width</code> or
* <code>height</code> is zero or less
* @throws ArrayIndexOutOfBoundsException if the length of
* <code>rgb</code> is
* less than<code> width * height</code>.
*
*/
public ImageData createImmutableImageData(int rgb[], int width, int height,
boolean processAlpha) {
ImageData data = new ImageData(width, height, false, false,
processAlpha);
loadRGB(data, rgb);
return data;
}
/**
* Function to decode an <code>ImageData</code> from romized data.
*
* @param imageDataArrayPtr native pointer to image data as Java int
* @param imageDataArrayLength length of image data array
* @return <code>ImageData</code> created from romized data.
* @throws IllegalArgumentException if the id is invalid
*/
public ImageData createImmutableImageData(int imageDataArrayPtr,
int imageDataArrayLength) {
ImageData data = new ImageData();
if (!loadRomizedImage(data, imageDataArrayPtr,
imageDataArrayLength)) {
throw new IllegalArgumentException();
}
return data;
}
/**
* Creates an immutable image from decoded image data obtained from an
* <code>InputStream</code>. This method blocks until all image data has
* been read and decoded. After this method completes (whether by
* returning or by throwing an exception) the stream is left open and its
* current position is undefined.
*
* @param stream the name of the resource containing the image data
* in one of the supported image formats
*
* @return the created image
* @throws NullPointerException if <code>stream</code> is <code>null</code>
* @throws java.io.IOException if an I/O error occurs, if the image data
* cannot be loaded, or if the image data cannot be decoded
*
*/
public ImageData createImmutableImageData(InputStream stream)
throws IOException {
ImageData data = new ImageData();
createImageFromStream(data, stream);
return data;
}
/**
* Populates an immutable <code>ImageData</code>
* from decoded data obtained from an <code>InputStream</code>.
* This method blocks until all image data has
* been read and decoded. After this method completes (whether by
* returning or by throwing an exception) the stream is left open and its
* current position is undefined.
*
* @param data The <code>ImageData</code> to be populated
* @param stream the name of the resource containing the image data
* in one of the supported image formats
*
* @throws NullPointerException if <code>stream</code> is <code>null</code>
* @throws java.io.IOException if an I/O error occurs, if the image data
* cannot be loaded, or if the image data cannot be decoded
*
*/
private void createImageFromStream(ImageData data, InputStream stream)
throws java.io.IOException {
if (stream == null) {
throw new java.io.IOException();
} else {
/*
* Allocate an array assuming available is correct.
* Only reading an EOF is the real end of file
* so allocate an extra byte to read the EOF into.
* If available is incorrect, increase the buffer
* size and keep reading.
*/
int l = stream.available();
byte[] buffer = new byte[l+1];
int length = 0;
// TBD: Guard against an implementation with incorrect available
while ((l = stream.read(buffer, length, buffer.length-length))
!= -1) {
length += l;
if (length == buffer.length) {
byte[] b = new byte[buffer.length + 4096];
System.arraycopy(buffer, 0, b, 0, length);
buffer = b;
}
}
stream.close();
try {
decode(data, buffer, 0, length);
} catch (IllegalArgumentException e) {
throw new java.io.IOException();
}
}
}
/**
* Load an <code>ImageData</code> from cache. The real work is done in
* the native function.
*
* @param imageData The <code>ImageData</code> to be populated
* @param resName Image resource name
* @return true if image was loaded and created, false otherwise
*/
private boolean loadCachedImage(ImageData imageData,
String resName) {
MIDletSuite midletSuite =
MIDletStateHandler.getMidletStateHandler().getMIDletSuite();
int suiteId = midletSuite.getID();
return loadCachedImage0(imageData, suiteId, resName);
}
/**
* Native function to load native image data from cache and populate
* an immutable <code>ImageData</code>.
* pixelData and alphaData, width and height, will be set
* in native upon success.
*
* @param imageData The <code>ImageData</code> to populate
* @param suiteId The suite id
* @param resName The image resource name
* @return true if image was loaded and created, false otherwise
*/
private native boolean loadCachedImage0(ImageData imageData,
int suiteId, String resName);
/**
* Function to decode an <code>ImageData</code> from PNG data.
*
* @param imageData the <code>ImageData</code> to be populated
* @param imageBytes the array of image data in a supported image format
* @param imageOffset the offset of the start of the data in the array
* @param imageLength the length of the data in the array
*/
private void decodePNG(ImageData imageData,
byte[] imageBytes,
int imageOffset, int imageLength) {
// find the format of the image data
if (imageLength < pngHeader.length + 8) {
throw new IllegalArgumentException();
}
int width = ((imageBytes[imageOffset + 16] & 0x0ff) << 24) +
((imageBytes[imageOffset + 17] & 0x0ff) << 16) +
((imageBytes[imageOffset + 18] & 0x0ff) << 8) +
(imageBytes[imageOffset + 19] & 0x0ff);
int height = ((imageBytes[imageOffset + 20] & 0x0ff) << 24) +
((imageBytes[imageOffset + 21] & 0x0ff) << 16) +
((imageBytes[imageOffset + 22] & 0x0ff) << 8) +
(imageBytes[imageOffset + 23] & 0x0ff);
if (width <= 0 || height <= 0) {
throw new IllegalArgumentException();
}
imageData.initImageData(width, height, false, true);
// load the decoded PNG data into the data byte arrays
if (loadPNG(imageData, imageBytes, imageOffset, imageLength) ==
false) {
// if loadPNG returns false, the image contains
// only opaque pixel and the alpha data is not needed
imageData.removeAlpha();
}
}
/**
* Function to decode an <code>ImageData</code> from JPEG data.
*
* @param imageData the <code>ImageData</code> to be populated
* @param imageBytes the array of image data in a supported image format
* @param imageOffset the offset of the start of the data in the array
* @param imageLength the length of the data in the array
*/
private void decodeJPEG(ImageData imageData,
byte[] imageBytes,
int imageOffset,
int imageLength) {
// find the format of the image data
if (imageLength < jpegHeader.length + 8) {
throw new IllegalArgumentException();
}
int width = 0;
int height = 0;
/**
* Find SOF (Start Of Frame) marker:
* format of SOF
* 2 bytes Marker Identity (0xff 0xc<N>)
* 2 bytes Length of block
* 1 byte bits/sample
* 2 bytes Image Height
* 2 bytes Image Width
* 1 bytes Number of components
* n bytes the components
*
* Searching for the byte pair representing SOF is unsafe
* because a prior marker might contain the SOFn pattern
* so we must skip over the preceding markers.
*
* When editing this code, don't forget to make the appropriate changes
* in src/lowlevelui/graphics_util/reference/native/gxutl_image_util.c.
*/
int idx = imageOffset + 2;
while (idx + 8 < imageOffset + imageLength) {
if (imageBytes[idx] != (byte)0xff) {
break;
}
if ((byte) (imageBytes[idx + 1] & 0xf0) == (byte) 0xc0) {
byte code = imageBytes[idx + 1];
if (code != (byte) 0xc4 || code != (byte) 0xcc) {
/* Big endian */
height = ((imageBytes[idx + 5] & 0xff) << 8) +
(imageBytes[idx + 6] & 0xff);
width = ((imageBytes[idx + 7] & 0xff) << 8) +
(imageBytes[idx + 8] & 0xff);
break;
}
}
/* Go to the next marker */
int field_len = ((imageBytes[idx + 2] & 0xff) << 8) +
(imageBytes[idx + 3] & 0xff);
idx += field_len + 2;
}
if (width <= 0 || height <= 0) {
throw new IllegalArgumentException();
}
imageData.initImageData(width, height, false, false);
// load the decoded JPEG data into the pixelData array
loadJPEG(imageData, imageBytes, imageOffset, imageLength);
}
/**
* Function to decode an <code>ImageData</code> from RAW data.
*
* @param imageData the <code>ImageData</code> to be populated
* @param imageBytes the array of image data in a supported image format
* @param imageOffset the offset of the start of the data in the array
* @param imageLength the length of the data in the array
*/
private void decodeRAW(ImageData imageData,
byte[] imageBytes,
int imageOffset,
int imageLength) {
// find the format of the image data
if (imageLength < rawHeader.length + 8) {
throw new IllegalArgumentException();
}
loadRAW(imageData, imageBytes, imageOffset, imageLength);
}
/**
* Function to compare byte data to the given header
*
* @param header header data to compare imageData with
* @param imageData the array of image data in a supported image format
* @param imageOffset the offset of the start of the data in the array
* @param imageLength the length of the data in the array
* @return true if the header.length bytes at imageData[imageOffset]
* are equal to the bytes in header array, false otherwise
*/
private boolean headerMatch(byte[] header,
byte[] imageData,
int imageOffset,
int imageLength) {
if (imageLength < header.length) {
return false;
}
for (int i = 0; i < header.length; i++) {
if (imageData[imageOffset + i] != header[i]) {
return false;
}
}
return true;
}
/**
* Function to decode an <code>ImageData</code> from byte data.
*
* @param imageData the <code>ImageData<code> to populate
* @param imageBytes the array of image data in a supported image format
* @param imageOffset the offset of the start of the data in the array
* @param imageLength the length of the data in the array
* @throws IllegalArgumentException if the data is not formatted correctly
*/
private void decode(ImageData imageData,
byte[] imageBytes, int imageOffset, int imageLength) {
// check if it is a PNG image
if (headerMatch(pngHeader, imageBytes, imageOffset, imageLength)) {
// image type is PNG
decodePNG(imageData, imageBytes, imageOffset, imageLength);
} else if (headerMatch(jpegHeader, imageBytes,
imageOffset, imageLength)) {
// image type is JPEG
decodeJPEG(imageData, imageBytes, imageOffset, imageLength);
} else if (headerMatch(rawHeader, imageBytes,
imageOffset, imageLength)) {
// image type is RAW
decodeRAW(imageData, imageBytes, imageOffset, imageLength);
} else {
// does not match supported image type
throw new IllegalArgumentException();
}
}
/**
* Native function to load an <code>ImageData</code> from PNG data.
*
* @param imageData the <code>ImageData</code> to load to
* @param imageBytes the array of image data in a supported image format
* @param imageOffset the offset of the start of the data in the array
* @param imageLength the length of the data in the array
*
* @return true if there is alpha data
*/
private native boolean loadPNG(ImageData imageData,
byte[] imageBytes,
int imageOffset,
int imageLength);
/**
* Native function to load an <code>ImageData </code>from JPEG data.
*
* @param imageData the <code>ImageData</code> to load to
* @param imageBytes the array of image data in a supported image format
* @param imageOffset the offset of the start of the data in the array
* @param imageLength the length of the data in the array
*/
private native void loadJPEG(ImageData imageData,
byte[] imageBytes,
int imageOffset,
int imageLength);
/**
* Native function to load an <code>ImageData</code>
* directly out of the rom image.
*
* @param data The <code>ImageData</code> to load to
* @param imageDataArrayPtr native pointer to image data as Java int
* @param imageDataArrayLength length of image data array
* @return true if romized image was loaded successfully,
* false - otherwise
*/
private native boolean loadRomizedImage(ImageData data,
int imageDataArrayPtr, int imageDataArrayLength);
/**
* Native function to load an <code>ImageData</code> from ARGB data.
*
* @param imgData The <code>ImageData</code> to load to
* @param rgb the array of image data in a ARGB format
*/
private native void loadRGB(ImageData imgData, int[] rgb);
/**
* Native function to load an <code>ImageData</code> from RAW data.
*
* @param imgData The <code>ImageData</code> to load to
* @param imageBytes the array of image data in a RAW format
*/
private native void loadRAW(ImageData imgData,
byte[] imageBytes,
int imageOffset,
int imageLength);
/**
* Copy either Java or romized data into another <code>ImageData</code>
* from an <code>ImageData</code> region.
*
* @param dest the <code>ImageData</code> to copy to
* @param source the source image to be copied from
* @param x the horizontal location of the region to be copied
* @param y the vertical location of the region to be copied
* @param width the width of the region to be copied
* @param height the height of the region to be copied
* @param transform the transform to be applied to the region
*/
private native void loadRegion(ImageData dest, ImageData source,
int x, int y,
int width, int height,
int transform);
}
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