bool KIPIWriteImage::write2PNG(const QString& destPath)
{
/*
check this out for b/w support:
http://lxr.kde.org/source/playground/graphics/krita-exp/kis_png_converter.cpp#607
*/
QFile file(destPath);
if (!file.open(QIODevice::ReadWrite))
{
qDebug() << "Failed to open PNG file for writing" ;
return false;
}
uchar* data = 0;
int bitsDepth = d->sixteenBit ? 16 : 8;
png_color_8 sig_bit;
png_bytep row_ptr;
png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
png_infop info_ptr = png_create_info_struct(png_ptr);
png_set_write_fn(png_ptr, (void*)&file, kipi_png_write_fn, kipi_png_flush_fn);
if (QSysInfo::ByteOrder == QSysInfo::LittleEndian) // Intel
png_set_bgr(png_ptr);
else // PPC
png_set_swap_alpha(png_ptr);
if (d->hasAlpha)
{
png_set_IHDR(png_ptr, info_ptr, d->width, d->height, bitsDepth,
PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
if (d->sixteenBit)
data = new uchar[d->width * 8 * sizeof(uchar)];
else
data = new uchar[d->width * 4 * sizeof(uchar)];
}
else
{
png_set_IHDR(png_ptr, info_ptr, d->width, d->height, bitsDepth,
PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
if (d->sixteenBit)
data = new uchar[d->width * 6 * sizeof(uchar)];
else
data = new uchar[d->width * 3 * sizeof(uchar)];
}
sig_bit.red = bitsDepth;
sig_bit.green = bitsDepth;
sig_bit.blue = bitsDepth;
sig_bit.alpha = bitsDepth;
png_set_sBIT(png_ptr, info_ptr, &sig_bit);
png_set_compression_level(png_ptr, 9);
// Write Software info.
QString libpngver(QLatin1String(PNG_HEADER_VERSION_STRING));
libpngver.replace(QLatin1Char('\n'), QLatin1Char(' '));
QByteArray softAscii = libpngver.toLatin1();
png_text text;
text.key = (png_charp)"Software";
text.text = softAscii.data();
text.compression = PNG_TEXT_COMPRESSION_zTXt;
png_set_text(png_ptr, info_ptr, &(text), 1);
png_write_info(png_ptr, info_ptr);
png_set_shift(png_ptr, &sig_bit);
png_set_packing(png_ptr);
uchar* ptr = (uchar*)d->data.data();
uint x, y, j;
for (y = 0; y < d->height; ++y)
{
if (cancel())
{
delete [] data;
file.close();
png_destroy_write_struct(&png_ptr, (png_infopp) & info_ptr);
png_destroy_info_struct(png_ptr, (png_infopp) & info_ptr);
return false;
}
j = 0;
for (x = 0; x < d->width*bytesDepth(); x+=bytesDepth())
{
if (d->sixteenBit)
{
if (d->hasAlpha)
{
data[j++] = ptr[x+1]; // Blue
data[j++] = ptr[ x ];
data[j++] = ptr[x+3]; // Green
data[j++] = ptr[x+2];
data[j++] = ptr[x+5]; // Red
data[j++] = ptr[x+4];
data[j++] = ptr[x+7]; // Alpha
data[j++] = ptr[x+6];
}
else
{
data[j++] = ptr[x+1]; // Blue
data[j++] = ptr[ x ];
data[j++] = ptr[x+3]; // Green
data[j++] = ptr[x+2];
data[j++] = ptr[x+5]; // Red
data[j++] = ptr[x+4];
}
}
else
{
if (d->hasAlpha)
{
data[j++] = ptr[ x ]; // Blue
data[j++] = ptr[x+1]; // Green
data[j++] = ptr[x+2]; // Red
data[j++] = ptr[x+3]; // Alpha
}
else
{
data[j++] = ptr[ x ]; // Blue
data[j++] = ptr[x+1]; // Green
data[j++] = ptr[x+2]; // Red
}
}
}
row_ptr = (png_bytep) data;
png_write_rows(png_ptr, &row_ptr, 1);
ptr += (d->width * bytesDepth());
}
delete [] data;
png_write_end(png_ptr, info_ptr);
png_destroy_write_struct(&png_ptr, (png_infopp) & info_ptr);
png_destroy_info_struct(png_ptr, (png_infopp) & info_ptr);
file.close();
return true;
}
bool KPWriteImage::write2PNG(const QString& destPath)
{
FILE* file = fopen(QFile::encodeName(destPath), "wb");
if (!file)
{
kDebug( 51000 ) << "Failed to open PNG file for writing" << endl;
return false;
}
uchar *data = 0;
int bitsDepth = d->sixteenBit ? 16 : 8;
png_color_8 sig_bit;
png_bytep row_ptr;
png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
png_infop info_ptr = png_create_info_struct(png_ptr);
png_init_io(png_ptr, file);
if (QSysInfo::ByteOrder == QSysInfo::LittleEndian) // Intel
png_set_bgr(png_ptr);
else // PPC
png_set_swap_alpha(png_ptr);
if (d->hasAlpha)
{
png_set_IHDR(png_ptr, info_ptr, d->width, d->height, bitsDepth,
PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
if (d->sixteenBit)
data = new uchar[d->width * 8 * sizeof(uchar)];
else
data = new uchar[d->width * 4 * sizeof(uchar)];
}
else
{
png_set_IHDR(png_ptr, info_ptr, d->width, d->height, bitsDepth,
PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
if (d->sixteenBit)
data = new uchar[d->width * 6 * sizeof(uchar)];
else
data = new uchar[d->width * 3 * sizeof(uchar)];
}
sig_bit.red = bitsDepth;
sig_bit.green = bitsDepth;
sig_bit.blue = bitsDepth;
sig_bit.alpha = bitsDepth;
png_set_sBIT(png_ptr, info_ptr, &sig_bit);
png_set_compression_level(png_ptr, 9);
// Write ICC profil.
if (!d->iccProfile.isEmpty())
{
png_set_iCCP(png_ptr, info_ptr, (png_charp)"icc", PNG_COMPRESSION_TYPE_BASE,
d->iccProfile.data(), d->iccProfile.size());
}
// Write Software info.
QString libpngver(PNG_HEADER_VERSION_STRING);
libpngver.replace('\n', ' ');
QString soft = d->kipipluginsVer;
soft.append(QString(" (%1)").arg(libpngver));
png_text text;
text.key = (png_charp)"Software";
text.text = soft.toAscii().data();
text.compression = PNG_TEXT_COMPRESSION_zTXt;
png_set_text(png_ptr, info_ptr, &(text), 1);
// Store Exif data.
QByteArray ba = d->metadata.getExif(true);
writeRawProfile(png_ptr, info_ptr, (png_charp)"exif", ba.data(), (png_uint_32) ba.size());
// Store Iptc data.
QByteArray ba2 = d->metadata.getIptc();
writeRawProfile(png_ptr, info_ptr, (png_charp)"iptc", ba2.data(), (png_uint_32) ba2.size());
// Store Xmp data.
QByteArray ba3 = d->metadata.getXmp();
writeRawProfile(png_ptr, info_ptr, (png_charp)("xmp"), ba3.data(), (png_uint_32) ba3.size());
png_write_info(png_ptr, info_ptr);
png_set_shift(png_ptr, &sig_bit);
png_set_packing(png_ptr);
uchar* ptr = (uchar*)d->data.data();
uint x, y, j;
for (y = 0; y < d->height; y++)
{
if (cancel())
{
delete [] data;
fclose(file);
png_destroy_write_struct(&png_ptr, (png_infopp) & info_ptr);
png_destroy_info_struct(png_ptr, (png_infopp) & info_ptr);
return false;
}
j = 0;
for (x = 0; x < d->width*bytesDepth(); x+=bytesDepth())
{
if (d->sixteenBit)
{
if (d->hasAlpha)
{
data[j++] = ptr[x+1]; // Blue
data[j++] = ptr[ x ];
data[j++] = ptr[x+3]; // Green
data[j++] = ptr[x+2];
data[j++] = ptr[x+5]; // Red
data[j++] = ptr[x+4];
data[j++] = ptr[x+7]; // Alpha
data[j++] = ptr[x+6];
}
else
{
data[j++] = ptr[x+1]; // Blue
data[j++] = ptr[ x ];
data[j++] = ptr[x+3]; // Green
data[j++] = ptr[x+2];
data[j++] = ptr[x+5]; // Red
data[j++] = ptr[x+4];
}
}
else
{
if (d->hasAlpha)
{
data[j++] = ptr[ x ]; // Blue
data[j++] = ptr[x+1]; // Green
data[j++] = ptr[x+2]; // Red
data[j++] = ptr[x+3]; // Alpha
}
else
{
data[j++] = ptr[ x ]; // Blue
data[j++] = ptr[x+1]; // Green
data[j++] = ptr[x+2]; // Red
}
}
}
row_ptr = (png_bytep) data;
png_write_rows(png_ptr, &row_ptr, 1);
ptr += (d->width * bytesDepth());
}
delete [] data;
png_write_end(png_ptr, info_ptr);
png_destroy_write_struct(&png_ptr, (png_infopp) & info_ptr);
png_destroy_info_struct(png_ptr, (png_infopp) & info_ptr);
fclose(file);
return true;
}
