Method rasterInto

valdi/src/valdi/android/AndroidViewHolder.cpp:76–127

}

Valdi::Result<Valdi::Void> AndroidViewHolder::rasterInto(const Valdi::Ref<Valdi::IBitmap>& bitmap,
                                                         const Valdi::Frame& frame,
                                                         const Valdi::Matrix& transform,
                                                         float rasterScaleX,
                                                         float rasterScaleY) {
    auto androidBitmap = Valdi::castOrNull<AndroidBitmap>(bitmap);
    SC_ASSERT_NOTNULL(androidBitmap);
    if (androidBitmap == nullptr) {
        return Valdi::Error("Invalid bitmap");
    }

    Valdi::CoordinateResolver resolver(_viewManager.getPointScale());
    auto left = resolver.toPixels(frame.getLeft());
    auto top = resolver.toPixels(frame.getTop());
    auto right = resolver.toPixels(frame.getRight());
    auto bottom = resolver.toPixels(frame.getBottom());

    auto javaTransform = JavaObject(JavaEnv());
    if (!transform.isIdentity()) {
        auto affineValues = transform.values;
        const float a = affineValues[0];
        const float b = affineValues[1];
        const float c = affineValues[2];
        const float d = affineValues[3];
        const float tx = resolver.toPixelsF(affineValues[4]);
        const float ty = resolver.toPixelsF(affineValues[5]);

        // Android Matrix.setValues expects 9 floats in row-major order:
        // [ MSCALE_X, MSKEW_X, MTRANS_X,
        //   MSKEW_Y, MSCALE_Y, MTRANS_Y,
        //   MPERSP_0, MPERSP_1, MPERSP_2 ]
        // Map from affine [a, b, c, d, tx, ty]
        float matrix9[9] = {a, c, tx, b, d, ty, 0.f, 0.f, 1.f};
        javaTransform = toJavaFloatArray(JavaEnv(), matrix9, 9);
    }

    auto errorMessage = JavaEnv::getCache().getViewRefRasterMethod().call(toObject(),
                                                                          androidBitmap->getJavaBitmap(),
                                                                          left,
                                                                          top,
                                                                          right,
                                                                          bottom,
                                                                          rasterScaleX,
                                                                          rasterScaleY,
                                                                          javaTransform);

    if (errorMessage.isNull()) {
        return Valdi::Void();
    }

    return Valdi::Error(toInternedString(JavaEnv(), errorMessage));
}

VALDI_CLASS_IMPL(AndroidViewHolder)