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/*
* ========================================================
*
* h-core
* Copyright Mahrouss Logic, all rights reserved.
*
* ========================================================
*/
#include <SystemKit/MePNG.hpp>
#include <NewKit/ErrorID.hpp>
#include <NewKit/Utils.hpp>
#include <NewKit/Ref.hpp>
static const char* png_error_to_str(const int err);
enum
{
kPngErrAdler,
kPngErrCrc,
kPngErrCompr,
kPngUnknown,
};
typedef void* PNGImage;
static const char* png_error_to_str(const int err)
{
switch (err)
{
case kPngErrAdler:
return "PNG: Bad adler32.";
case kPngErrCompr:
return "PngLin: Bad compression.";
case kPngErrCrc:
return "PNG: Bad CRC32.";
case kPngUnknown:
default:
return "PNG: Error while loading image.";
}
return "PNG: Unknown error.";
}
class PngHeader final
{
public:
UInt8 Mag1;
Char* Mag2;
UInt16 DosDetect;
UInt16 DosEOF;
UInt16 UnixLF;
};
#define kIHDRMag "IHDR"
#define kIDATMag "IDAT"
#define kIENDMag "IEND"
MeFilePtr png_open_file(const char* path)
{
MeFilePtr thePng = new MeFile(path);
thePng->SetMIME("image/png");
thePng->Rewind();
return thePng;
}
static h-core::Ref<PngHeader> png_read_header(MeFilePtr thePng)
{
if (thePng)
{
h-core::Ref<PngHeader> header;
header.Leak().Mag1 = *(UInt8*)thePng->Read(sizeof(UInt8));
h-core::rt_copy_memory((h-core::voidPtr)header.Leak().Mag2,
(h-core::voidPtr)thePng->Read(h-core::string_length("PNG")),
h-core::string_length("PNG"));
header.Leak().DosDetect = *(UInt16*)thePng->Read(sizeof(UInt16));
header.Leak().DosEOF = *(UInt16*)thePng->Read(sizeof(UInt16));
header.Leak().UnixLF = *(UInt16*)thePng->Read(sizeof(UInt16));
return header;
}
return h-core::Ref<PngHeader>{ };
}
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