void QgsHttpRequestHandler::setGetMapResponse( const QString& service, QImage* img, int imageQuality = -1 )
{
Q_UNUSED( service );
QgsMessageLog::logMessage( "setting getmap response..." );
if ( img )
{
bool png16Bit = ( mFormatString.compare( "image/png; mode=16bit", Qt::CaseInsensitive ) == 0 );
bool png8Bit = ( mFormatString.compare( "image/png; mode=8bit", Qt::CaseInsensitive ) == 0 );
bool png1Bit = ( mFormatString.compare( "image/png; mode=1bit", Qt::CaseInsensitive ) == 0 );
bool isBase64 = mFormatString.endsWith( ";base64", Qt::CaseInsensitive );
if ( mFormat != "PNG" && mFormat != "JPG" && !png16Bit && !png8Bit && !png1Bit )
{
QgsMessageLog::logMessage( "service exception - incorrect image format requested..." );
setServiceException( QgsMapServiceException( "InvalidFormat", "Output format '" + mFormatString + "' is not supported in the GetMap request" ) );
return;
}
//store the image in a QByteArray and set it directly
QByteArray ba;
QBuffer buffer( &ba );
buffer.open( QIODevice::WriteOnly );
// Do not use imageQuality for PNG images
// For now, QImage expects quality to be a range 0-9 for PNG
if ( mFormat == "PNG" )
{
imageQuality = -1;
}
if ( png8Bit )
{
QVector<QRgb> colorTable;
medianCut( colorTable, 256, *img );
QImage palettedImg = img->convertToFormat( QImage::Format_Indexed8, colorTable, Qt::ColorOnly | Qt::ThresholdDither |
Qt::ThresholdAlphaDither | Qt::NoOpaqueDetection );
palettedImg.save( &buffer, "PNG", imageQuality );
}
else if ( png16Bit )
{
QImage palettedImg = img->convertToFormat( QImage::Format_ARGB4444_Premultiplied );
palettedImg.save( &buffer, "PNG", imageQuality );
}
else if ( png1Bit )
{
QImage palettedImg = img->convertToFormat( QImage::Format_Mono, Qt::MonoOnly | Qt::ThresholdDither |
Qt::ThresholdAlphaDither | Qt::NoOpaqueDetection );
palettedImg.save( &buffer, "PNG", imageQuality );
}
else
{
img->save( &buffer, mFormat.toUtf8().data(), imageQuality );
}
if ( isBase64 )
{
ba = ba.toBase64();
}
setHttpResponse( &ba, formatToMimeType( mFormat ) );
}
}
void Gif::createPalette(unsigned char* pixels) {
unsigned char* copy = new unsigned char[width*height*3];
memcpy(copy, pixels, width*height*3 * sizeof(unsigned char));
palette = medianCut((MCPoint*)copy, width*height, palette_size);
delete[] copy;
palette_created = true;
}
// Write image response
void writeImage( QgsServerResponse &response, QImage &img, const QString &formatStr,
int imageQuality )
{
ImageOutputFormat outputFormat = parseImageFormat( formatStr );
QImage result;
QString saveFormat;
QString contentType;
switch ( outputFormat )
{
case PNG:
result = img;
contentType = "image/png";
saveFormat = "PNG";
break;
case PNG8:
{
QVector<QRgb> colorTable;
medianCut( colorTable, 256, img );
result = img.convertToFormat( QImage::Format_Indexed8, colorTable,
Qt::ColorOnly | Qt::ThresholdDither |
Qt::ThresholdAlphaDither | Qt::NoOpaqueDetection );
}
contentType = "image/png";
saveFormat = "PNG";
break;
case PNG16:
result = img.convertToFormat( QImage::Format_ARGB4444_Premultiplied );
contentType = "image/png";
saveFormat = "PNG";
break;
case PNG1:
result = img.convertToFormat( QImage::Format_Mono,
Qt::MonoOnly | Qt::ThresholdDither |
Qt::ThresholdAlphaDither | Qt::NoOpaqueDetection );
contentType = "image/png";
saveFormat = "PNG";
break;
case JPEG:
result = img;
contentType = "image/jpeg";
saveFormat = "JPEG";
break;
default:
QgsMessageLog::logMessage( QString( "Unsupported format string %1" ).arg( formatStr ) );
saveFormat = UNKN;
break;
}
if ( outputFormat != UNKN )
{
response.setHeader( "Content-Type", contentType );
result.save( response.io(), qPrintable( saveFormat ), imageQuality );
}
else
{
throw QgsServiceException( "InvalidFormat",
QString( "Output format '%1' is not supported in the GetMap request" ).arg( formatStr ) );
}
}