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Added simplistic ability to rotate an LCDUI image (once), to help out some devices that receive the image rotated 90 degrees

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git-svn-id: https://zxing.googlecode.com/svn/trunk@1607 59b500cc-1b3d-0410-9834-0bbf25fbcc57
This commit is contained in:
srowen 2010-09-30 15:11:06 +00:00
parent f1bee324b4
commit 493ddb3a13
1 changed files with 68 additions and 10 deletions
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78
javame/src/com/google/zxing/client/j2me/LCDUIImageLuminanceSource.java
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@ -62,11 +62,7 @@ public final class LCDUIImageLuminanceSource extends LuminanceSource {
}
image.getRGB(rgbData, 0, width, 0, y, width, 1);
for (int x = 0; x < width; x++) {
int pixel = rgbData[x];
int luminance = (((pixel & 0x00FF0000) >> 16) +
((pixel & 0x0000FF00) >> 7) +
(pixel & 0x000000FF )) >> 2;
row[x] = (byte) luminance;
row[x] = toLuminance(rgbData[x]);
}
return row;
}
@ -82,14 +78,76 @@ public final class LCDUIImageLuminanceSource extends LuminanceSource {
for (int y = 0; y < height; y++) {
int offset = y * width;
for (int x = 0; x < width; x++) {
int pixel = rgb[offset + x];
int luminance = (((pixel & 0x00FF0000) >> 16) +
((pixel & 0x0000FF00) >> 7) +
(pixel & 0x000000FF )) >> 2;
matrix[offset + x] = (byte) luminance;
matrix[offset + x] = toLuminance(rgb[offset + x]);
}
}
return matrix;
}
public boolean isRotateSupported() {
return true;
}
public LuminanceSource rotateCounterClockwise() {
return new CCRotatedLCDUIImageLuminanceSource(image);
}
static byte toLuminance(int pixel) {
return (byte) ((((pixel & 0x00FF0000) >> 16) +
((pixel & 0x0000FF00) >> 7) +
(pixel & 0x000000FF )) >> 2);
}
/**
* A variant on {@link LCDUIImageLuminanceSource} that acts as if the input is rotated 90 degrees
* counter-clockwise.
*/
private static final class CCRotatedLCDUIImageLuminanceSource extends LuminanceSource {
private final Image image;
private int[] rgbData;
private CCRotatedLCDUIImageLuminanceSource(Image image) {
super(image.getHeight(), image.getWidth());
this.image = image;
}
public byte[] getRow(int y, byte[] row) {
int height = getHeight();
if (y < 0 || y >= height) {
throw new IllegalArgumentException("Requested row is outside the image: " + y);
}
int width = getWidth();
if (row == null || row.length < width) {
row = new byte[width];
}
if (rgbData == null || rgbData.length < width) {
rgbData = new int[width];
}
image.getRGB(rgbData, 0, height, height - 1 - y, 0, 1, width);
for (int x = 0; x < width; x++) {
row[x] = toLuminance(rgbData[x]);
}
return row;
}
public byte[] getMatrix() {
int width = getWidth();
int height = getHeight();
int area = width * height;
byte[] matrix = new byte[area];
int[] rgb = new int[area];
image.getRGB(rgb, 0, width, 0, 0, width, height);
// This flips x/y in the target to result in a rotated image
int offset = height * (width - 1);
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
matrix[offset - height * x + y] = toLuminance(rgb[y * width + x]);
}
}
return matrix;
}
}
}