mirror of
https://github.com/openharmony/graphic_utils.git
synced 2026-07-01 21:44:51 -04:00
baimin
77 lines
2.1 KiB
C++
77 lines
2.1 KiB
C++
/*
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* Copyright (c) 2020-2021 Huawei Device Co., Ltd.
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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 "gfx_utils/pixel_format_utils.h"
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namespace OHOS {
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static struct {
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ImagePixelFormat pixelFormat;
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int16_t bpp;
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} g_mapBpp[] = {
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{IMAGE_PIXEL_FORMAT_RGB565, 2},
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{IMAGE_PIXEL_FORMAT_ARGB1555, 2},
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{IMAGE_PIXEL_FORMAT_RGB888, 3},
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{IMAGE_PIXEL_FORMAT_ARGB8888, 4},
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};
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bool PixelFormatUtils::BppOfPixelFormat(ImagePixelFormat pixelFormat, int16_t& bpp)
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{
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int16_t len = sizeof(g_mapBpp) / sizeof(g_mapBpp[0]);
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for (int16_t i = 0; i < len; i++) {
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if (pixelFormat == g_mapBpp[i].pixelFormat) {
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bpp = g_mapBpp[i].bpp;
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return true;
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}
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}
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return false;
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}
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uint16_t PixelFormatUtils::ARGB8888ToARGB1555(uint32_t color)
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{
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PF_ARGB1555 ret;
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PF_ARGB8888 in;
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in.full = color;
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ret.alpha = in.alpha ? 1 : 0;
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/*
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* when 32-bitmap image is transformed to 16-bitmap
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* R should shift right 3 bits
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* G should shift right 3 bits
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* B should shift right 3 bits
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*/
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ret.red = in.red >> 3;
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ret.green = in.green >> 3;
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ret.blue = in.blue >> 3;
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return ret.full;
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}
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uint32_t PixelFormatUtils::ARGB1555ToARGB8888(uint16_t color)
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{
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PF_ARGB8888 ret;
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PF_ARGB1555 in;
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in.full = color;
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ret.alpha = in.alpha ? 0xFF : 0x0;
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/*
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* when 16-bitmap image is transformed to 32-bitmap
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* R should shift left 3 bits
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* G should shift left 3 bits
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* B should shift left 3 bits
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*/
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ret.red = in.red << 3;
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ret.green = in.green << 3;
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ret.blue = in.blue << 3;
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return ret.full;
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}
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} // namespace OHOS
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