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Avoid check for transparency when there is no alpha channel

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git-svn-id: https://zxing.googlecode.com/svn/trunk@2327 59b500cc-1b3d-0410-9834-0bbf25fbcc57
This commit is contained in:
srowen 2012-06-26 10:23:54 +00:00
parent f0fb20f055
commit 7bc138ed7a
2 changed files with 26 additions and 22 deletions
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24
core/test/src/com/google/zxing/BufferedImageLuminanceSource.java
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@ -49,18 +49,20 @@ public final class BufferedImageLuminanceSource extends LuminanceSource {
// The color of fully-transparent pixels is irrelevant. They are often, technically, fully-transparent // The color of fully-transparent pixels is irrelevant. They are often, technically, fully-transparent
// black (0 alpha, and then 0 RGB). They are often used, of course as the "white" area in a // black (0 alpha, and then 0 RGB). They are often used, of course as the "white" area in a
// barcode image. Force any such pixel to be white: // barcode image. Force any such pixel to be white:
int[] buffer = new int[width]; if (image.getAlphaRaster() != null) {
for (int y = top; y < top + height; y++) { int[] buffer = new int[width];
image.getRGB(left, y, width, 1, buffer, 0, sourceWidth); for (int y = top; y < top + height; y++) {
boolean rowChanged = false; image.getRGB(left, y, width, 1, buffer, 0, sourceWidth);
for (int x = 0; x < width; x++) { boolean rowChanged = false;
if ((buffer[x] & 0xFF000000) == 0) { for (int x = 0; x < width; x++) {
buffer[x] = 0xFFFFFFFF; // = white if ((buffer[x] & 0xFF000000) == 0) {
rowChanged = true; buffer[x] = 0xFFFFFFFF; // = white
rowChanged = true;
}
}
if (rowChanged) {
image.setRGB(left, y, width, 1, buffer, 0, sourceWidth);
} }
}
if (rowChanged) {
image.setRGB(left, y, width, 1, buffer, 0, sourceWidth);
} }
} }

24
javase/src/com/google/zxing/client/j2se/BufferedImageLuminanceSource.java
View file

@ -51,18 +51,20 @@ public final class BufferedImageLuminanceSource extends LuminanceSource {
// The color of fully-transparent pixels is irrelevant. They are often, technically, fully-transparent // The color of fully-transparent pixels is irrelevant. They are often, technically, fully-transparent
// black (0 alpha, and then 0 RGB). They are often used, of course as the "white" area in a // black (0 alpha, and then 0 RGB). They are often used, of course as the "white" area in a
// barcode image. Force any such pixel to be white: // barcode image. Force any such pixel to be white:
int[] buffer = new int[width]; if (image.getAlphaRaster() != null) {
for (int y = top; y < top + height; y++) { int[] buffer = new int[width];
image.getRGB(left, y, width, 1, buffer, 0, sourceWidth); for (int y = top; y < top + height; y++) {
boolean rowChanged = false; image.getRGB(left, y, width, 1, buffer, 0, sourceWidth);
for (int x = 0; x < width; x++) { boolean rowChanged = false;
if ((buffer[x] & 0xFF000000) == 0) { for (int x = 0; x < width; x++) {
buffer[x] = 0xFFFFFFFF; // = white if ((buffer[x] & 0xFF000000) == 0) {
rowChanged = true; buffer[x] = 0xFFFFFFFF; // = white
rowChanged = true;
}
}
if (rowChanged) {
image.setRGB(left, y, width, 1, buffer, 0, sourceWidth);
} }
}
if (rowChanged) {
image.setRGB(left, y, width, 1, buffer, 0, sourceWidth);
} }
} }