1f380a6ec6
* Overhaul the image library, Phase I. The preps for our upcoming mipgen command line tool by adding filtering capabilities and unit tests for a new LinearImage class, which will subsume Image (deprecated). Filament's new image library is composed of three components: - LinearImage....simple 3D tensor of floats - ImageOps.......free functions for simple transforms - ImageSampler...high quality filtering The old Image class was a simple untyped data blob and is now deprecated. The new LinearImage class is always float32, and always stores pixels in packed scanline order. This makes it easier to implement image-based algorithms because they can be agnostic of the underlying format. Remaining refactorings: - Phase II will migrate imageio to LinearImage - Phase III will migrate all downstream tools to LinearImage - Phase IV will remove old the Image class * Image library code review feedback.
57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
/*
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* Copyright (C) 2018 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 <image/LinearImage.h>
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#include <cstring> // for memset
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#include <memory>
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namespace image {
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struct LinearImage::SharedReference {
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SharedReference(uint32_t width, uint32_t height, uint32_t channels) {
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const uint32_t nfloats = width * height * channels;
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float* floats = new float[nfloats];
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memset(floats, 0, sizeof(float) * nfloats);
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pixels = std::shared_ptr<float>(floats, std::default_delete<float[]>());
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}
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std::shared_ptr<float> pixels;
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};
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LinearImage::~LinearImage() {
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delete mDataRef;
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}
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LinearImage::LinearImage(uint32_t width, uint32_t height, uint32_t channels) :
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mDataRef(new SharedReference(width, height, channels)),
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mData(mDataRef->pixels.get()),
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mWidth(width), mHeight(height), mChannels(channels) {}
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LinearImage::LinearImage(const LinearImage& that) {
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*this = that;
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}
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LinearImage& LinearImage::operator=(const LinearImage& that) {
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mDataRef = that.mDataRef ? new SharedReference(*that.mDataRef) : nullptr;
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mData = that.mData;
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mWidth = that.mWidth;
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mHeight = that.mHeight;
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mChannels = that.mChannels;
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return *this;
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}
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} // namespace image
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