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/*
* barrier -- mouse and keyboard sharing utility
* Copyright (C) 2014-2016 Symless Ltd.
* Patch by Ryan Chapman
*
* This package is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* found in the file LICENSE that should have accompanied this file.
*
* This package is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "platform/OSXClipboardBMPConverter.h"
#include "base/Log.h"
// BMP file header structure
struct CBMPHeader {
public:
UInt16 type;
UInt32 size;
UInt16 reserved1;
UInt16 reserved2;
UInt32 offset;
};
// BMP is little-endian
static inline
UInt32
fromLEU32(const UInt8* data)
{
return static_cast<UInt32>(data[0]) |
(static_cast<UInt32>(data[1]) << 8) |
(static_cast<UInt32>(data[2]) << 16) |
(static_cast<UInt32>(data[3]) << 24);
}
static
void
toLE(UInt8*& dst, char src)
{
dst[0] = static_cast<UInt8>(src);
dst += 1;
}
static
void
toLE(UInt8*& dst, UInt16 src)
{
dst[0] = static_cast<UInt8>(src & 0xffu);
dst[1] = static_cast<UInt8>((src >> 8) & 0xffu);
dst += 2;
}
static
void
toLE(UInt8*& dst, UInt32 src)
{
dst[0] = static_cast<UInt8>(src & 0xffu);
dst[1] = static_cast<UInt8>((src >> 8) & 0xffu);
dst[2] = static_cast<UInt8>((src >> 16) & 0xffu);
dst[3] = static_cast<UInt8>((src >> 24) & 0xffu);
dst += 4;
}
OSXClipboardBMPConverter::OSXClipboardBMPConverter()
{
// do nothing
}
OSXClipboardBMPConverter::~OSXClipboardBMPConverter()
{
// do nothing
}
IClipboard::EFormat
OSXClipboardBMPConverter::getFormat() const
{
return IClipboard::kBitmap;
}
CFStringRef
OSXClipboardBMPConverter::getOSXFormat() const
{
// TODO: does this only work with Windows?
return CFSTR("com.microsoft.bmp");
}
std::string OSXClipboardBMPConverter::fromIClipboard(const std::string& bmp) const
{
LOG((CLOG_DEBUG1 "ENTER OSXClipboardBMPConverter::doFromIClipboard()"));
// create BMP image
UInt8 header[14];
UInt8* dst = header;
toLE(dst, 'B');
toLE(dst, 'M');
toLE(dst, static_cast<UInt32>(14 + bmp.size()));
toLE(dst, static_cast<UInt16>(0));
toLE(dst, static_cast<UInt16>(0));
toLE(dst, static_cast<UInt32>(14 + 40));
return std::string(reinterpret_cast<const char*>(header), 14) + bmp;
}
std::string OSXClipboardBMPConverter::toIClipboard(const std::string& bmp) const
{
// make sure data is big enough for a BMP file
if (bmp.size() <= 14 + 40) {
return {};
}
// check BMP file header
const UInt8* rawBMPHeader = reinterpret_cast<const UInt8*>(bmp.data());
if (rawBMPHeader[0] != 'B' || rawBMPHeader[1] != 'M') {
return {};
}
// get offset to image data
UInt32 offset = fromLEU32(rawBMPHeader + 10);
// construct BMP
if (offset == 14 + 40) {
return bmp.substr(14);
}
else {
return bmp.substr(14, 40) + bmp.substr(offset, bmp.size() - offset);
}
}
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