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Feature: adding luminance inversion to mupdf fitz android #76

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Feature: adding luminance inversion to mupdf fitz android #76

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afa8f7e
feat: Added additional argument to AndroidDrawDevice.drawPage to allo…
siddarth0vader Aug 2, 2025
a2de380
fix: Corrected order of luminance inversion operation
siddarth0vader Aug 2, 2025
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11 changes: 8 additions & 3 deletions platform/java/src/com/artifex/mupdf/fitz/android/AndroidDrawDevice.java
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Original file line number Diff line number Diff line change
Expand Up @@ -64,27 +64,32 @@ public AndroidDrawDevice(Bitmap bitmap) {
this(bitmap, 0, 0, true);
}

public static Bitmap drawPage(Page page, Matrix ctm) {
public static Bitmap drawPage(Page page, Matrix ctm, boolean isLuminanceInverted) {
RectI ibox = new RectI(page.getBounds().transform(ctm));
int w = ibox.x1 - ibox.x0;
int h = ibox.y1 - ibox.y0;
Bitmap bmp = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
AndroidDrawDevice dev = new AndroidDrawDevice(bmp, ibox.x0, ibox.y0);
try {
page.run(dev, ctm, null);
if (isLuminanceInverted) dev.invertLuminance();
dev.close();
} finally {
dev.destroy();
}
return bmp;
}

public static Bitmap drawPage(Page page, Matrix ctm) {
return drawPage(page, ctm, false);
}

public static Bitmap drawPage(Page page, float dpi, int rotate) {
return drawPage(page, new Matrix(dpi / 72).rotate(rotate));
return drawPage(page, new Matrix(dpi / 72).rotate(rotate), false);
}

public static Bitmap drawPage(Page page, float dpi) {
return drawPage(page, new Matrix(dpi / 72));
return drawPage(page, new Matrix(dpi / 72), false);
}

public static Matrix fitPage(Page page, int fitW, int fitH) {
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