John Reck
947eade98b
When doing the fallback from alpha8 to rgba8888 when alpha8 gralloc buffers are not available, we need to convert the contents as well to ensure that the gainmap shader processes the correct channel(s) Bug: 356778382 Test: silkfx w/ hardware allocation; updated uirendering GainmapTests Flag: EXEMPT bugfix Change-Id: I4bc571cd9e1f7715a1e269e516ce2678df297274
57 lines
2.3 KiB
C++
57 lines
2.3 KiB
C++
/**
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* Copyright (C) 2023 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "Gainmap.h"
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#include <SkBitmap.h>
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#include <SkCanvas.h>
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#include <SkColorFilter.h>
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#include <SkImagePriv.h>
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#include <SkPaint.h>
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#include "HardwareBitmapUploader.h"
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namespace android::uirenderer {
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sp<Gainmap> Gainmap::allocateHardwareGainmap(const sp<Gainmap>& srcGainmap) {
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auto gainmap = sp<Gainmap>::make();
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gainmap->info = srcGainmap->info;
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SkBitmap skSrcBitmap = srcGainmap->bitmap->getSkBitmap();
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if (skSrcBitmap.info().colorType() == kAlpha_8_SkColorType &&
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!HardwareBitmapUploader::hasAlpha8Support()) {
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// The regular Bitmap::allocateHardwareBitmap will do a conversion that preserves channels,
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// so alpha8 maps to the alpha channel of rgba. However, for gainmaps we will interpret
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// the data of an rgba buffer differently as we'll only look at the rgb channels
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// So we need to map alpha8 to rgbx_8888 essentially
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SkBitmap bitmap;
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bitmap.allocPixels(skSrcBitmap.info().makeColorType(kN32_SkColorType));
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SkCanvas canvas(bitmap);
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SkPaint paint;
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const float alphaToOpaque[] = {0, 0, 0, 1, 0, 0, 0, 0, 1, 0,
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0, 0, 0, 1, 0, 0, 0, 0, 0, 255};
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paint.setColorFilter(SkColorFilters::Matrix(alphaToOpaque, SkColorFilters::Clamp::kNo));
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canvas.drawImage(SkMakeImageFromRasterBitmap(skSrcBitmap, kNever_SkCopyPixelsMode), 0, 0,
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SkSamplingOptions{}, &paint);
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skSrcBitmap = bitmap;
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}
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sk_sp<Bitmap> skBitmap(Bitmap::allocateHardwareBitmap(skSrcBitmap));
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if (!skBitmap.get()) {
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return nullptr;
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}
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gainmap->bitmap = std::move(skBitmap);
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return gainmap;
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}
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} // namespace android::uirenderer
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