SkBmpCodec.cpp File Reference

#include "src/codec/SkBmpCodec.h"
#include "include/codec/SkBmpDecoder.h"
#include "include/core/SkData.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkSize.h"
#include "include/core/SkStream.h"
#include "include/private/SkEncodedInfo.h"
#include "include/private/base/SkAlign.h"
#include "src/codec/SkBmpMaskCodec.h"
#include "src/codec/SkBmpRLECodec.h"
#include "src/codec/SkBmpStandardCodec.h"
#include "src/codec/SkCodecPriv.h"
#include "src/core/SkMasks.h"
#include <cstring>
#include <memory>
#include <utility>

Go to the source code of this file.

Namespaces
namespace	SkBmpDecoder

Enumerations
enum	BmpHeaderType {   kInfoV1_BmpHeaderType , kInfoV2_BmpHeaderType , kInfoV3_BmpHeaderType , kInfoV4_BmpHeaderType ,   kInfoV5_BmpHeaderType , kOS2V1_BmpHeaderType , kOS2VX_BmpHeaderType , kUnknown_BmpHeaderType }
enum	BmpCompressionMethod {   kNone_BmpCompressionMethod = 0 , k8BitRLE_BmpCompressionMethod = 1 , k4BitRLE_BmpCompressionMethod = 2 , kBitMasks_BmpCompressionMethod = 3 ,   kJpeg_BmpCompressionMethod = 4 , kPng_BmpCompressionMethod = 5 , kAlphaBitMasks_BmpCompressionMethod = 6 , kCMYK_BmpCompressionMethod = 11 ,   kCMYK8BitRLE_BmpCompressionMethod = 12 , kCMYK4BitRLE_BmpCompressionMethod = 13 }
enum	BmpInputFormat { kStandard_BmpInputFormat , kRLE_BmpInputFormat , kBitMask_BmpInputFormat , kUnknown_BmpInputFormat }

Functions
static BmpHeaderType	get_header_type (size_t infoBytes)
SK_API bool	SkBmpDecoder::IsBmp (const void *, size_t)
SK_API std::unique_ptr< SkCodec >	SkBmpDecoder::Decode (std::unique_ptr< SkStream >, SkCodec::Result *, SkCodecs::DecodeContext=nullptr)
SK_API std::unique_ptr< SkCodec >	SkBmpDecoder::Decode (sk_sp< SkData >, SkCodec::Result *, SkCodecs::DecodeContext=nullptr)

Variables
static constexpr uint32_t	kBmpHeaderBytes = 14
static constexpr uint32_t	kBmpHeaderBytesPlusFour = kBmpHeaderBytes + 4
static constexpr uint32_t	kBmpOS2V1Bytes = 12
static constexpr uint32_t	kBmpOS2V2Bytes = 64
static constexpr uint32_t	kBmpInfoBaseBytes = 16
static constexpr uint32_t	kBmpInfoV1Bytes = 40
static constexpr uint32_t	kBmpInfoV2Bytes = 52
static constexpr uint32_t	kBmpInfoV3Bytes = 56
static constexpr uint32_t	kBmpInfoV4Bytes = 108
static constexpr uint32_t	kBmpInfoV5Bytes = 124
static constexpr uint32_t	kBmpMaskBytes = 12

Enumeration Type Documentation

BmpCompressionMethod

enum BmpCompressionMethod

Enumerator
kNone_BmpCompressionMethod
k8BitRLE_BmpCompressionMethod
k4BitRLE_BmpCompressionMethod
kBitMasks_BmpCompressionMethod
kJpeg_BmpCompressionMethod
kPng_BmpCompressionMethod
kAlphaBitMasks_BmpCompressionMethod
kCMYK_BmpCompressionMethod
kCMYK8BitRLE_BmpCompressionMethod
kCMYK4BitRLE_BmpCompressionMethod

Definition at line 45 of file SkBmpCodec.cpp.

                          {
    kNone_BmpCompressionMethod =          0,
    k8BitRLE_BmpCompressionMethod =       1,
    k4BitRLE_BmpCompressionMethod =       2,
    kBitMasks_BmpCompressionMethod =      3,
    kJpeg_BmpCompressionMethod =          4,
    kPng_BmpCompressionMethod =           5,
    kAlphaBitMasks_BmpCompressionMethod = 6,
    kCMYK_BmpCompressionMethod =          11,
    kCMYK8BitRLE_BmpCompressionMethod =   12,
    kCMYK4BitRLE_BmpCompressionMethod =   13
};

BmpHeaderType

enum BmpHeaderType

Enumerator
kInfoV1_BmpHeaderType
kInfoV2_BmpHeaderType
kInfoV3_BmpHeaderType
kInfoV4_BmpHeaderType
kInfoV5_BmpHeaderType
kOS2V1_BmpHeaderType
kOS2VX_BmpHeaderType
kUnknown_BmpHeaderType

Definition at line 31 of file SkBmpCodec.cpp.

                   {
    kInfoV1_BmpHeaderType,
    kInfoV2_BmpHeaderType,
    kInfoV3_BmpHeaderType,
    kInfoV4_BmpHeaderType,
    kInfoV5_BmpHeaderType,
    kOS2V1_BmpHeaderType,
    kOS2VX_BmpHeaderType,
    kUnknown_BmpHeaderType
};

BmpInputFormat

enum BmpInputFormat

Enumerator
kStandard_BmpInputFormat
kRLE_BmpInputFormat
kBitMask_BmpInputFormat
kUnknown_BmpInputFormat

Definition at line 61 of file SkBmpCodec.cpp.

                    {
    kStandard_BmpInputFormat,
    kRLE_BmpInputFormat,
    kBitMask_BmpInputFormat,
    kUnknown_BmpInputFormat
};

Function Documentation

get_header_type()

static BmpHeaderType get_header_type ( size_t  infoBytes )

static

Definition at line 108 of file SkBmpCodec.cpp.

                                                       {
    if (infoBytes >= kBmpInfoBaseBytes) {
        // Check the version of the header
        switch (infoBytes) {
            case kBmpInfoV1Bytes:
                return kInfoV1_BmpHeaderType;
            case kBmpInfoV2Bytes:
                return kInfoV2_BmpHeaderType;
            case kBmpInfoV3Bytes:
                return kInfoV3_BmpHeaderType;
            case kBmpInfoV4Bytes:
                return kInfoV4_BmpHeaderType;
            case kBmpInfoV5Bytes:
                return kInfoV5_BmpHeaderType;
            case 16:
            case 20:
            case 24:
            case 28:
            case 32:
            case 36:
            case 42:
            case 46:
            case 48:
            case 60:
            case kBmpOS2V2Bytes:
                return kOS2VX_BmpHeaderType;
            default:
                SkCodecPrintf("Error: unknown bmp header format.\n");
                return kUnknown_BmpHeaderType;
        }
    } if (infoBytes >= kBmpOS2V1Bytes) {
        // The OS2V1 is treated separately because it has a unique format
        return kOS2V1_BmpHeaderType;
    } else {
        // There are no valid bmp headers
        SkCodecPrintf("Error: second bitmap header size is invalid.\n");
        return kUnknown_BmpHeaderType;
    }
}

Variable Documentation

kBmpHeaderBytes

constexpr uint32_t kBmpHeaderBytes = 14

staticconstexpr

Definition at line 96 of file SkBmpCodec.cpp.

kBmpHeaderBytesPlusFour

constexpr uint32_t kBmpHeaderBytesPlusFour = kBmpHeaderBytes + 4

staticconstexpr

Definition at line 97 of file SkBmpCodec.cpp.

kBmpInfoBaseBytes

constexpr uint32_t kBmpInfoBaseBytes = 16

staticconstexpr

Definition at line 100 of file SkBmpCodec.cpp.

kBmpInfoV1Bytes

constexpr uint32_t kBmpInfoV1Bytes = 40

staticconstexpr

Definition at line 101 of file SkBmpCodec.cpp.

kBmpInfoV2Bytes

constexpr uint32_t kBmpInfoV2Bytes = 52

staticconstexpr

Definition at line 102 of file SkBmpCodec.cpp.

kBmpInfoV3Bytes

constexpr uint32_t kBmpInfoV3Bytes = 56

staticconstexpr

Definition at line 103 of file SkBmpCodec.cpp.

kBmpInfoV4Bytes

constexpr uint32_t kBmpInfoV4Bytes = 108

staticconstexpr

Definition at line 104 of file SkBmpCodec.cpp.

kBmpInfoV5Bytes

constexpr uint32_t kBmpInfoV5Bytes = 124

staticconstexpr

Definition at line 105 of file SkBmpCodec.cpp.

kBmpMaskBytes

constexpr uint32_t kBmpMaskBytes = 12

staticconstexpr

Definition at line 106 of file SkBmpCodec.cpp.

kBmpOS2V1Bytes

constexpr uint32_t kBmpOS2V1Bytes = 12

staticconstexpr

Definition at line 98 of file SkBmpCodec.cpp.

kBmpOS2V2Bytes

constexpr uint32_t kBmpOS2V2Bytes = 64

staticconstexpr

Definition at line 99 of file SkBmpCodec.cpp.