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Improve a bit the image generator, even if it's just a toy:

Browse source 
- use QImage instead of QPixmap, and save some QPixmap <-> QImage conversions
- make it able to read from raw data (read from stdin) as a simple example of the functionality

svn path=/trunk/playground/graphics/okular/; revision=622775
This commit is contained in:
Pino Toscano 2007-01-12 23:03:12 +00:00
parent 24ec1e37c5
commit 4f8724b62b
2 changed files with 30 additions and 8 deletions
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31
generators/kimgio/generator_kimgio.cpp
View file

@ -8,7 +8,6 @@
***************************************************************************/
#include <qpainter.h>
#include <qimage.h>
#include <kprinter.h>
#include <okular/core/page.h>
@ -27,11 +26,25 @@ KIMGIOGenerator::~KIMGIOGenerator()
bool KIMGIOGenerator::loadDocument( const QString & fileName, QVector<Okular::Page*> & pagesVector )
{
m_pix = new QPixmap(fileName);
if ( !m_img.load( fileName ) )
return false;
pagesVector.resize( 1 );
Okular::Page * page = new Okular::Page( 0, m_pix->width(), m_pix->height(), Okular::Rotation0 );
Okular::Page * page = new Okular::Page( 0, m_img.width(), m_img.height(), Okular::Rotation0 );
pagesVector[0] = page;
return true;
}
bool KIMGIOGenerator::loadDocumentFromData( const QByteArray & fileData, QVector<Okular::Page*> & pagesVector )
{
if ( !m_img.loadFromData( fileData ) )
return false;
pagesVector.resize( 1 );
Okular::Page * page = new Okular::Page( 0, m_img.width(), m_img.height(), Okular::Rotation0 );
pagesVector[0] = page;
return true;
@ -39,8 +52,7 @@ bool KIMGIOGenerator::loadDocument( const QString & fileName, QVector<Okular::Pa
bool KIMGIOGenerator::closeDocument()
{
delete m_pix;
m_pix = 0;
m_img = QImage();
return true;
}
@ -57,7 +69,7 @@ void KIMGIOGenerator::generatePixmap( Okular::PixmapRequest * request )
int height = request->height();
if ( request->page()->rotation() % 2 == 1 )
qSwap( width, height );
QImage image = m_pix->toImage().scaled( width, height, Qt::IgnoreAspectRatio, Qt::SmoothTransformation );
QImage image = m_img.scaled( width, height, Qt::IgnoreAspectRatio, Qt::SmoothTransformation );
request->page()->setPixmap( request->id(), new QPixmap( QPixmap::fromImage( image ) ) );
// signal that the request has been accomplished
@ -67,9 +79,14 @@ void KIMGIOGenerator::generatePixmap( Okular::PixmapRequest * request )
bool KIMGIOGenerator::print( KPrinter& printer )
{
QPainter p( &printer );
p.drawPixmap( 0, 0, *m_pix );
p.drawImage( 0, 0, m_img );
return true;
}
bool KIMGIOGenerator::hasFeature( GeneratorFeature feature ) const
{
return feature == Okular::Generator::ReadRawData;
}
#include "generator_kimgio.moc"

7
generators/kimgio/generator_kimgio.h
View file

@ -12,6 +12,8 @@
#include <okular/core/generator.h>
#include <qimage.h>
class KIMGIOGenerator : public Okular::Generator
{
Q_OBJECT
@ -21,6 +23,7 @@ class KIMGIOGenerator : public Okular::Generator
// [INHERITED] load a document and fill up the pagesVector
bool loadDocument( const QString & fileName, QVector<Okular::Page*> & pagesVector );
bool loadDocumentFromData( const QByteArray & fileData, QVector<Okular::Page*> & pagesVector );
bool closeDocument();
// [INHERITED] perform actions on document / pages
@ -30,8 +33,10 @@ class KIMGIOGenerator : public Okular::Generator
// [INHERITED] print document using already configured kprinter
bool print( KPrinter& printer );
bool hasFeature( GeneratorFeature feature ) const;
private:
QPixmap *m_pix;
QImage m_img;
};
#endif