SkYUVAInfo.cpp File Reference

#include "include/core/SkYUVAInfo.h"
#include "include/core/SkColor.h"
#include "src/base/SkSafeMath.h"
#include "src/core/SkYUVAInfoLocation.h"
#include <algorithm>

Go to the source code of this file.

Functions
static bool	is_plane_config_compatible_with_subsampling (SkYUVAInfo::PlaneConfig config, SkYUVAInfo::Subsampling subsampling)
static bool	channel_index_to_channel (uint32_t channelFlags, int channelIdx, SkColorChannel *channel)

Function Documentation

channel_index_to_channel()

static bool channel_index_to_channel ( uint32_t  channelFlags, int  channelIdx, SkColorChannel *  channel  )

static

Definition at line 144 of file SkYUVAInfo.cpp.

                                                              {
    switch (channelFlags) {
        case kGray_SkColorChannelFlag:  // For gray returning any of R, G, or B for index 0 is ok.
        case kRed_SkColorChannelFlag:
            if (channelIdx == 0) {
                *channel = SkColorChannel::kR;
                return true;
            }
            return false;
        case kGrayAlpha_SkColorChannelFlags:
            switch (channelIdx) {
                case 0: *channel = SkColorChannel::kR; return true;
                case 1: *channel = SkColorChannel::kA; return true;
 
                default: return false;
            }
        case kAlpha_SkColorChannelFlag:
            if (channelIdx == 0) {
                *channel = SkColorChannel::kA;
                return true;
            }
            return false;
        case kRG_SkColorChannelFlags:
            if (channelIdx == 0 || channelIdx == 1) {
                *channel = static_cast<SkColorChannel>(channelIdx);
                return true;
            }
            return false;
        case kRGB_SkColorChannelFlags:
            if (channelIdx >= 0 && channelIdx <= 2) {
                *channel = static_cast<SkColorChannel>(channelIdx);
                return true;
            }
            return false;
        case kRGBA_SkColorChannelFlags:
            if (channelIdx >= 0 && channelIdx <= 3) {
                *channel = static_cast<SkColorChannel>(channelIdx);
                return true;
            }
            return false;
        default:
            return false;
    }
}

is_plane_config_compatible_with_subsampling()

static bool is_plane_config_compatible_with_subsampling ( SkYUVAInfo::PlaneConfig  config, SkYUVAInfo::Subsampling  subsampling  )

static

Definition at line 16 of file SkYUVAInfo.cpp.

                                                                                           {
    if (config      == SkYUVAInfo::PlaneConfig::kUnknown ||
        subsampling == SkYUVAInfo::Subsampling::kUnknown) {
        return false;
    }
    return subsampling == SkYUVAInfo::Subsampling::k444 ||
           (config != SkYUVAInfo::PlaneConfig::kYUV  &&
            config != SkYUVAInfo::PlaneConfig::kYUVA &&
            config != SkYUVAInfo::PlaneConfig::kUYV  &&
            config != SkYUVAInfo::PlaneConfig::kUYVA);
}