147 lines
4.6 KiB
C++
147 lines
4.6 KiB
C++
/*
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* Copyright (C) 2007 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 <ui/PixelFormat.h>
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#include <hardware/hardware.h>
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// ----------------------------------------------------------------------------
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namespace android {
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// ----------------------------------------------------------------------------
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static const int COMPONENT_YUV = 0xFF;
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struct Info {
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size_t size;
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size_t bitsPerPixel;
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struct {
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uint8_t ah;
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uint8_t al;
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uint8_t rh;
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uint8_t rl;
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uint8_t gh;
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uint8_t gl;
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uint8_t bh;
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uint8_t bl;
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};
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uint8_t components;
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};
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static Info const sPixelFormatInfos[] = {
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{ 0, 0, { 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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{ 4, 32, {32,24, 8, 0, 16, 8, 24,16 }, PixelFormatInfo::RGBA },
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{ 4, 24, { 0, 0, 8, 0, 16, 8, 24,16 }, PixelFormatInfo::RGB },
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{ 3, 24, { 0, 0, 8, 0, 16, 8, 24,16 }, PixelFormatInfo::RGB },
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{ 2, 16, { 0, 0, 16,11, 11, 5, 5, 0 }, PixelFormatInfo::RGB },
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{ 4, 32, {32,24, 24,16, 16, 8, 8, 0 }, PixelFormatInfo::RGBA },
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{ 2, 16, { 1, 0, 16,11, 11, 6, 6, 1 }, PixelFormatInfo::RGBA },
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{ 2, 16, { 4, 0, 16,12, 12, 8, 8, 4 }, PixelFormatInfo::RGBA },
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{ 1, 8, { 8, 0, 0, 0, 0, 0, 0, 0 }, PixelFormatInfo::ALPHA},
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{ 1, 8, { 0, 0, 8, 0, 8, 0, 8, 0 }, PixelFormatInfo::L },
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{ 2, 16, {16, 8, 8, 0, 8, 0, 8, 0 }, PixelFormatInfo::LA },
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{ 1, 8, { 0, 0, 8, 5, 5, 2, 2, 0 }, PixelFormatInfo::RGB },
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};
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static const Info* gGetPixelFormatTable(size_t* numEntries) {
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if (numEntries) {
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*numEntries = sizeof(sPixelFormatInfos)/sizeof(Info);
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}
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return sPixelFormatInfos;
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}
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// ----------------------------------------------------------------------------
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size_t PixelFormatInfo::getScanlineSize(unsigned int width) const
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{
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size_t size;
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if (components == COMPONENT_YUV) {
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// YCbCr formats are different.
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size = (width * bitsPerPixel)>>3;
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} else {
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size = width * bytesPerPixel;
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}
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return size;
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}
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ssize_t bytesPerPixel(PixelFormat format)
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{
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PixelFormatInfo info;
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status_t err = getPixelFormatInfo(format, &info);
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return (err < 0) ? err : info.bytesPerPixel;
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}
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ssize_t bitsPerPixel(PixelFormat format)
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{
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PixelFormatInfo info;
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status_t err = getPixelFormatInfo(format, &info);
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return (err < 0) ? err : info.bitsPerPixel;
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}
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status_t getPixelFormatInfo(PixelFormat format, PixelFormatInfo* info)
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{
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if (format <= 0)
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return BAD_VALUE;
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if (info->version != sizeof(PixelFormatInfo))
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return INVALID_OPERATION;
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// YUV format from the HAL are handled here
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switch (format) {
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case HAL_PIXEL_FORMAT_YCbCr_422_SP:
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case HAL_PIXEL_FORMAT_YCbCr_422_I:
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info->bitsPerPixel = 16;
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goto done;
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case HAL_PIXEL_FORMAT_YCrCb_420_SP:
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case HAL_PIXEL_FORMAT_YV12:
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info->bitsPerPixel = 12;
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done:
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info->format = format;
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info->components = COMPONENT_YUV;
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info->bytesPerPixel = 1;
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info->h_alpha = 0;
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info->l_alpha = 0;
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info->h_red = info->h_green = info->h_blue = 8;
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info->l_red = info->l_green = info->l_blue = 0;
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return NO_ERROR;
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}
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size_t numEntries;
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const Info *i = gGetPixelFormatTable(&numEntries) + format;
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bool valid = uint32_t(format) < numEntries;
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if (!valid) {
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return BAD_INDEX;
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}
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info->format = format;
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info->bytesPerPixel = i->size;
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info->bitsPerPixel = i->bitsPerPixel;
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info->h_alpha = i->ah;
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info->l_alpha = i->al;
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info->h_red = i->rh;
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info->l_red = i->rl;
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info->h_green = i->gh;
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info->l_green = i->gl;
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info->h_blue = i->bh;
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info->l_blue = i->bl;
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info->components = i->components;
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return NO_ERROR;
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}
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// ----------------------------------------------------------------------------
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}; // namespace android
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// ----------------------------------------------------------------------------
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