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/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <ui/PixelFormat.h>
#include <hardware/hardware.h>
// ----------------------------------------------------------------------------
namespace android {
// ----------------------------------------------------------------------------
static const int COMPONENT_YUV = 0xFF;
struct Info {
size_t size;
size_t bitsPerPixel;
struct {
uint8_t ah;
uint8_t al;
uint8_t rh;
uint8_t rl;
uint8_t gh;
uint8_t gl;
uint8_t bh;
uint8_t bl;
};
uint8_t components;
};
static Info const sPixelFormatInfos[] = {
{ 0, 0, { 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
{ 4, 32, {32,24, 8, 0, 16, 8, 24,16 }, PixelFormatInfo::RGBA },
{ 4, 24, { 0, 0, 8, 0, 16, 8, 24,16 }, PixelFormatInfo::RGB },
{ 3, 24, { 0, 0, 8, 0, 16, 8, 24,16 }, PixelFormatInfo::RGB },
{ 2, 16, { 0, 0, 16,11, 11, 5, 5, 0 }, PixelFormatInfo::RGB },
{ 4, 32, {32,24, 24,16, 16, 8, 8, 0 }, PixelFormatInfo::RGBA },
{ 2, 16, { 1, 0, 16,11, 11, 6, 6, 1 }, PixelFormatInfo::RGBA },
{ 2, 16, { 4, 0, 16,12, 12, 8, 8, 4 }, PixelFormatInfo::RGBA },
{ 1, 8, { 8, 0, 0, 0, 0, 0, 0, 0 }, PixelFormatInfo::ALPHA},
{ 1, 8, { 0, 0, 8, 0, 8, 0, 8, 0 }, PixelFormatInfo::L },
{ 2, 16, {16, 8, 8, 0, 8, 0, 8, 0 }, PixelFormatInfo::LA },
{ 1, 8, { 0, 0, 8, 5, 5, 2, 2, 0 }, PixelFormatInfo::RGB },
};
static const Info* gGetPixelFormatTable(size_t* numEntries) {
if (numEntries) {
*numEntries = sizeof(sPixelFormatInfos)/sizeof(Info);
}
return sPixelFormatInfos;
}
// ----------------------------------------------------------------------------
size_t PixelFormatInfo::getScanlineSize(unsigned int width) const
{
size_t size;
if (components == COMPONENT_YUV) {
// YCbCr formats are different.
size = (width * bitsPerPixel)>>3;
} else {
size = width * bytesPerPixel;
}
return size;
}
ssize_t bytesPerPixel(PixelFormat format)
{
PixelFormatInfo info;
status_t err = getPixelFormatInfo(format, &info);
return (err < 0) ? err : info.bytesPerPixel;
}
ssize_t bitsPerPixel(PixelFormat format)
{
PixelFormatInfo info;
status_t err = getPixelFormatInfo(format, &info);
return (err < 0) ? err : info.bitsPerPixel;
}
status_t getPixelFormatInfo(PixelFormat format, PixelFormatInfo* info)
{
if (format <= 0)
return BAD_VALUE;
if (info->version != sizeof(PixelFormatInfo))
return INVALID_OPERATION;
// YUV format from the HAL are handled here
switch (format) {
case HAL_PIXEL_FORMAT_YCbCr_422_SP:
case HAL_PIXEL_FORMAT_YCbCr_422_I:
info->bitsPerPixel = 16;
goto done;
case HAL_PIXEL_FORMAT_YCrCb_420_SP:
case HAL_PIXEL_FORMAT_YV12:
info->bitsPerPixel = 12;
done:
info->format = format;
info->components = COMPONENT_YUV;
info->bytesPerPixel = 1;
info->h_alpha = 0;
info->l_alpha = 0;
info->h_red = info->h_green = info->h_blue = 8;
info->l_red = info->l_green = info->l_blue = 0;
return NO_ERROR;
}
size_t numEntries;
const Info *i = gGetPixelFormatTable(&numEntries) + format;
bool valid = uint32_t(format) < numEntries;
if (!valid) {
return BAD_INDEX;
}
info->format = format;
info->bytesPerPixel = i->size;
info->bitsPerPixel = i->bitsPerPixel;
info->h_alpha = i->ah;
info->l_alpha = i->al;
info->h_red = i->rh;
info->l_red = i->rl;
info->h_green = i->gh;
info->l_green = i->gl;
info->h_blue = i->bh;
info->l_blue = i->bl;
info->components = i->components;
return NO_ERROR;
}
// ----------------------------------------------------------------------------
}; // namespace android
// ----------------------------------------------------------------------------
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