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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 <pixelflinger/format.h>
#include <hardware/hardware.h>
namespace android {
static const int COMPONENT_YUV = 0xFF;
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 GGLFormat *i = gglGetPixelFormatTable(&numEntries) + format;
bool valid = uint32_t(format) < numEntries;
if (!valid) {
return BAD_INDEX;
}
#define COMPONENT(name) \
case GGL_##name: info->components = PixelFormatInfo::name; break;
switch (i->components) {
COMPONENT(ALPHA)
COMPONENT(RGB)
COMPONENT(RGBA)
COMPONENT(LUMINANCE)
COMPONENT(LUMINANCE_ALPHA)
default:
return BAD_INDEX;
}
#undef COMPONENT
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;
return NO_ERROR;
}
}; // namespace android
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