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Commit 280b4409 authored by John Reck's avatar John Reck
Browse files

Implement encoding alpha8 gainmaps 

Fixes: 269746611
Test: atest android.graphics.cts.GainmapTest

Change-Id: I292a077ec75e7af8f8e8756fd0f36869415307c1
parent 6143bf4c

graphics/java/android/graphics/Bitmap.java

+1 −1
Original line number Diff line number Diff line
@@ -2001,7 +2001,7 @@ public final class Bitmap implements Parcelable { 
        checkPixelAccess(x, y);



        final ColorSpace cs = getColorSpace();

        if (cs.equals(ColorSpace.get(ColorSpace.Named.SRGB))) {

        if (cs == null || cs.equals(ColorSpace.get(ColorSpace.Named.SRGB))) {

            return Color.valueOf(nativeGetPixel(mNativePtr, x, y));

        }

        // The returned value is in kRGBA_F16_SkColorType, which is packed as

libs/hwui/hwui/Bitmap.cpp

+7 −0
Original line number Diff line number Diff line
@@ -463,6 +463,13 @@ bool Bitmap::compress(JavaCompressFormat format, int32_t quality, SkWStream* str 
    if (hasGainmap() && format == JavaCompressFormat::Jpeg) {

        SkBitmap baseBitmap = getSkBitmap();

        SkBitmap gainmapBitmap = gainmap()->bitmap->getSkBitmap();

        if (gainmapBitmap.colorType() == SkColorType::kAlpha_8_SkColorType) {

            SkBitmap greyGainmap;

            auto greyInfo = gainmapBitmap.info().makeColorType(SkColorType::kGray_8_SkColorType);

            greyGainmap.setInfo(greyInfo, gainmapBitmap.rowBytes());

            greyGainmap.setPixelRef(sk_ref_sp(gainmapBitmap.pixelRef()), 0, 0);

            gainmapBitmap = std::move(greyGainmap);

        }

        SkJpegEncoder::Options options{.fQuality = quality};

        return SkJpegGainmapEncoder::EncodeHDRGM(stream, baseBitmap.pixmap(), options,

                                                 gainmapBitmap.pixmap(), options, gainmap()->info);

tests/SilkFX/src/com/android/test/silkfx/hdr/GainmapImage.kt

+20 −14
Original line number Diff line number Diff line
@@ -174,8 +174,14 @@ class GainmapImage(context: Context, attrs: AttributeSet?) : FrameLayout(context 
        if (bitmap == null) return



        imageView.setImage(ImageSource.cachedBitmap(when (outputMode) {

            R.id.output_hdr -> { bitmap!!.gainmap = gainmap; bitmap!! }

            R.id.output_sdr -> { bitmap!!.gainmap = null; bitmap!! }

            R.id.output_hdr -> {

                bitmap!!.gainmap = gainmap; bitmap!!

            }



            R.id.output_sdr -> {

                bitmap!!.gainmap = null; bitmap!!

            }



            R.id.output_gainmap -> gainmapVisualizer!!

            else -> throw IllegalStateException()

        }))