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61 lines
1.9 KiB
61 lines
1.9 KiB
/*
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* Copyright 2020, 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 <stddef.h>
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#include <teeui/label.h>
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#include <teeui/localization/ConfirmationUITranslations.h>
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#include "example_utils.h"
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namespace teeui {
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namespace example {
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uint32_t alfaCombineChannel(uint32_t shift, double alfa, uint32_t a, uint32_t b) {
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a >>= shift;
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a &= 0xff;
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b >>= shift;
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b &= 0xff;
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double acc = alfa * a + (1 - alfa) * b;
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if (acc <= 0) return 0;
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uint32_t result = acc;
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if (result > 255) return 255 << shift;
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return result << shift;
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}
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Error FrameBuffer::drawPixel(uint32_t x, uint32_t y, uint32_t color) const {
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size_t pos = (top_ + y) * lineStride_ + x + left_;
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if (pos >= size_in_elements_) {
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return Error::OutOfBoundsDrawing;
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}
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double alfa = (color & 0xff000000) >> 24;
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alfa /= 255.0;
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auto acc = buffer_[pos];
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buffer_[pos] = alfaCombineChannel(0, alfa, color, acc) |
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alfaCombineChannel(8, alfa, color, acc) |
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alfaCombineChannel(16, alfa, color, acc);
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return Error::OK;
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}
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void translate(LabelImpl* label) {
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uint64_t textId = label->textId();
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const char* translation =
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localization::lookup(static_cast<localization::TranslationId>(textId));
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label->setText({&translation[0], &translation[strlen(translation)]});
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}
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} // namespace example
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} // namespace teeui
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