openharmony/third_party_qrcodegen
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In Java version, added parameters for custom module colors when rendering to BufferedImage, changed some demo code to use non-black/white colors.

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Project Nayuki 2021-07-28 17:48:21 +00:00
parent 87db45ef9c
commit bfd18b2fb8
1 changed files with 17 additions and 10 deletions
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27
java/src/main/java/io/nayuki/qrcodegen/QrCodeGeneratorDemo.java
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@ -132,11 +132,11 @@ public final class QrCodeGeneratorDemo {
// Illustration "Madoka": kanji, kana, Cyrillic, full-width Latin, Greek characters
String madoka = "「魔法少女まどか☆マギカ」って、　ИАИ　ｄｅｓｕ　κα？";
qr = QrCode.encodeText(madoka, QrCode.Ecc.LOW);
writePng(toImage(qr, 9, 4), "madoka-utf8-QR.png");
writePng(toImage(qr, 9, 4, 0xFFFFE0, 0x303080), "madoka-utf8-QR.png");
segs = Arrays.asList(QrSegmentAdvanced.makeKanji(madoka));
qr = QrCode.encodeSegments(segs, QrCode.Ecc.LOW);
writePng(toImage(qr, 9, 4), "madoka-kanji-QR.png");
writePng(toImage(qr, 9, 4, 0xE0F0FF, 0x404040), "madoka-kanji-QR.png");
}
@ -148,9 +148,9 @@ public final class QrCodeGeneratorDemo {
// Project Nayuki URL
segs = QrSegment.makeSegments("https://www.nayuki.io/");
qr = QrCode.encodeSegments(segs, QrCode.Ecc.HIGH, QrCode.MIN_VERSION, QrCode.MAX_VERSION, -1, true); // Automatic mask
writePng(toImage(qr, 8, 6), "project-nayuki-automask-QR.png");
writePng(toImage(qr, 8, 6, 0xE0FFE0, 0x206020), "project-nayuki-automask-QR.png");
qr = QrCode.encodeSegments(segs, QrCode.Ecc.HIGH, QrCode.MIN_VERSION, QrCode.MAX_VERSION, 3, true); // Force mask 3
writePng(toImage(qr, 8, 6), "project-nayuki-mask3-QR.png");
writePng(toImage(qr, 8, 6, 0xFFE0E0, 0x602020), "project-nayuki-mask3-QR.png");
// Chinese text as UTF-8
segs = QrSegment.makeSegments("維基百科（Wikipedia，聆聽i/ˌwɪkᵻˈpiːdi.ə/）是一個自由內容、公開編輯且多語言的網路百科全書協作計畫");
@ -168,20 +168,27 @@ public final class QrCodeGeneratorDemo {
/*---- Utilities ----*/
private static BufferedImage toImage(QrCode qr, int scale, int border) {
return toImage(qr, scale, border, 0xFFFFFF, 0x000000);
}
/**
* Returns a raster image depicting the specified QR Code, with the specified module scale and border modules.
* <p>For example, toImage(qr, scale=10, border=4) means to pad the QR Code with 4 light
* border modules on all four sides, and use 10&#xD7;10 pixels to represent each module.
* The resulting image only contains the hex colors 000000 and FFFFFF.
* Returns a raster image depicting the specified QR Code, with
* the specified module scale, border modules, and module colors.
* <p>For example, scale=10 and border=4 means to pad the QR Code with 4 light border
* modules on all four sides, and use 10&#xD7;10 pixels to represent each module.
* @param qr the QR Code to render (not {@code null})
* @param scale the side length (measured in pixels, must be positive) of each module
* @param border the number of border modules to add, which must be non-negative
* @param lightColor the color to use for light modules, in 0xRRGGBB format
* @param darkColor the color to use for dark modules, in 0xRRGGBB format
* @return a new image representing the QR Code, with padding and scaling
* @throws NullPointerException if the QR Code is {@code null}
* @throws IllegalArgumentException if the scale or border is out of range, or if
* {scale, border, size} cause the image dimensions to exceed Integer.MAX_VALUE
*/
private static BufferedImage toImage(QrCode qr, int scale, int border) {
private static BufferedImage toImage(QrCode qr, int scale, int border, int lightColor, int darkColor) {
Objects.requireNonNull(qr);
if (scale <= 0 || border < 0)
throw new IllegalArgumentException("Value out of range");
@ -192,7 +199,7 @@ public final class QrCodeGeneratorDemo {
for (int y = 0; y < result.getHeight(); y++) {
for (int x = 0; x < result.getWidth(); x++) {
boolean color = qr.getModule(x / scale - border, y / scale - border);
result.setRGB(x, y, color ? 0x000000 : 0xFFFFFF);
result.setRGB(x, y, color ? darkColor : lightColor);
}
}
return result;