95 lines
2.5 KiB
C++
95 lines
2.5 KiB
C++
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/*
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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 <pixelflinger/format.h>
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namespace android {
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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 >= 6) && (components <= 8)) {
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// YCbCr formats are differents.
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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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size_t numEntries;
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const GGLFormat *i = gglGetPixelFormatTable(&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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#define COMPONENT(name) \
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case GGL_##name: info->components = PixelFormatInfo::name; break;
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switch (i->components) {
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COMPONENT(ALPHA)
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COMPONENT(RGB)
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COMPONENT(RGBA)
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COMPONENT(LUMINANCE)
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COMPONENT(LUMINANCE_ALPHA)
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default:
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return BAD_INDEX;
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}
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#undef COMPONENT
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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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return NO_ERROR;
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}
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}; // namespace android
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