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Made zoom cache behavior configurable with var 'ZoomBehavior' (0 =no cache, 1 =x3 zoom cache, 2 = 2.5/5/10 cache). Cleanup.

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preferencesAboutTextFull
John Papale 4 years ago
parent c860e0b0b7
commit 8ba6d1b7b2
4 changed files with 83 additions and 98 deletions
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  1. 1
      src/core/UBSettings.cpp
  2. 1
      src/core/UBSettings.h
  3. 104
      src/pdf/XPDFRenderer.cpp
  4. 37
      src/pdf/XPDFRenderer.h

1
src/core/UBSettings.cpp
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@ -408,6 +408,7 @@ void UBSettings::init()
pdfMargin = new UBSetting(this, "PDF", "Margin", "20");
pdfPageFormat = new UBSetting(this, "PDF", "PageFormat", "A4");
pdfResolution = new UBSetting(this, "PDF", "Resolution", "300");
pdfZoomBehavior = new UBSetting(this, "PDF", "ZoomBehavior", "1");
podcastFramesPerSecond = new UBSetting(this, "Podcast", "FramesPerSecond", 10);
podcastVideoSize = new UBSetting(this, "Podcast", "VideoSize", "Medium");

1
src/core/UBSettings.h
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@ -359,6 +359,7 @@ class UBSettings : public QObject
UBSetting* pdfMargin;
UBSetting* pdfPageFormat;
UBSetting* pdfResolution;
UBSetting* pdfZoomBehavior;
UBSetting* podcastFramesPerSecond;
UBSetting* podcastVideoSize;

104
src/pdf/XPDFRenderer.cpp
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@ -37,29 +37,27 @@
#endif
#include "core/memcheck.h"
#include "core/UBSettings.h"
#ifdef XPDFRENDERER_CACHE_ZOOM_IMAGE
#ifdef XPDFRENDERER_CACHE_ZOOM_WITH_LOSS
double const XPDFRenderer::sRatioZoomRendering[] = { 3.0 };
#else //XPDFRENDERER_CACHE_ZOOM_WITH_LOSS
double const XPDFRenderer::sRatioZoomRendering[] = { 2.5, 5, 10.0 };
#endif //XPDFRENDERER_CACHE_ZOOM_WITH_LOSS
#endif //XPDFRENDERER_CACHE_ZOOM_IMAGE
QAtomicInt XPDFRenderer::sInstancesCount = 0;
XPDFRenderer::XPDFRenderer(const QString &filename, bool importingFile) :
#ifndef XPDFRENDERER_CACHE_ZOOM_IMAGE
mSplash(nullptr),
#endif //XPDFRENDERER_CACHE_ZOOM_IMAGE
mDocument(0)
{
#ifdef XPDFRENDERER_CACHE_ZOOM_IMAGE
for (int i = 0; i < NbrZoomCache; i++)
{
m_cache.push_back(TypeCacheData(sRatioZoomRendering[i]));
mpSplashBitmapHistorical(nullptr), mSplashHistorical(nullptr), mDocument(nullptr)
{
switch (UBSettings::settings()->pdfZoomBehavior->get().toUInt()) {
case 0: // Render each time (historical initial implementation).
break;
case 1: // Render a single image, degradated quality when zoomed big.
default:
m_pdfZoomCache.push_back(3.0);
break;
case 2: // Render three images, optimal quality all the time.
m_pdfZoomCache.push_back(2.5);
m_pdfZoomCache.push_back(5.0);
m_pdfZoomCache.push_back(10.0);
break;
}
#endif //XPDFRENDERER_CACHE_ZOOM_IMAGE
Q_UNUSED(importingFile);
if (!globalParams)
@ -83,17 +81,18 @@ XPDFRenderer::XPDFRenderer(const QString &filename, bool importingFile) :
XPDFRenderer::~XPDFRenderer()
{
#ifdef XPDFRENDERER_CACHE_ZOOM_IMAGE
for(int i = 0; i < m_cache.size(); i++)
for(int i = 0; i < m_pdfZoomCache.size(); i++)
{
TypeCacheData &cacheData = m_cache[i];
TypePdfZoomCacheData &cacheData = m_pdfZoomCache[i];
if(cacheData.splash != nullptr){
cacheData.cachedImage = QImage(); // The 'cachedImage' uses a buffer from 'splash'.
delete cacheData.splash;
cacheData.splash = nullptr;
}
}
#endif //XPDFRENDERER_CACHE_ZOOM_IMAGE
if(mSplashHistorical)
delete mSplashHistorical;
if (mDocument)
{
@ -198,33 +197,17 @@ int XPDFRenderer::pageRotation(int pageNumber) const
return 0;
}
#ifndef XPDFRENDERER_CACHE_ZOOM_IMAGE
void XPDFRenderer::render(QPainter *p, int pageNumber, const QRectF &bounds)
{
if (isValid())
{
qreal xscale = p->worldTransform().m11();
qreal yscale = p->worldTransform().m22();
QImage *pdfImage = createPDFImage(pageNumber, xscale, yscale, bounds);
QTransform savedTransform = p->worldTransform();
p->resetTransform();
p->drawImage(QPointF(savedTransform.dx() + mSliceX, savedTransform.dy() + mSliceY), *pdfImage);
p->setWorldTransform(savedTransform);
delete pdfImage;
}
}
QImage* XPDFRenderer::createPDFImage(int pageNumber, qreal xscale, qreal yscale, const QRectF &bounds)
QImage* XPDFRenderer::createPDFImageHistorical(int pageNumber, qreal xscale, qreal yscale, const QRectF &bounds)
{
if (isValid())
{
SplashColor paperColor = {0xFF, 0xFF, 0xFF}; // white
if(mSplash)
delete mSplash;
mSplash = new SplashOutputDev(splashModeRGB8, 1, false, paperColor);
if(mSplashHistorical)
delete mSplashHistorical;
mSplashHistorical = new SplashOutputDev(splashModeRGB8, 1, false, paperColor);
#ifdef USE_XPDF
mSplash->startDoc(mDocument->getXRef());
mSplashHistorical->startDoc(mDocument->getXRef());
#else
mSplash->startDoc(mDocument);
#endif
@ -237,7 +220,7 @@ QImage* XPDFRenderer::createPDFImage(int pageNumber, qreal xscale, qreal yscale,
if (bounds.isNull())
{
mDocument->displayPage(mSplash, pageNumber, this->dpiForRendering * xscale, this->dpiForRendering *yscale,
mDocument->displayPage(mSplashHistorical, pageNumber, this->dpiForRendering * xscale, this->dpiForRendering *yscale,
rotation, useMediaBox, crop, printing);
}
else
@ -247,21 +230,21 @@ QImage* XPDFRenderer::createPDFImage(int pageNumber, qreal xscale, qreal yscale,
qreal sliceW = bounds.width() * xscale;
qreal sliceH = bounds.height() * yscale;
mDocument->displayPageSlice(mSplash, pageNumber, this->dpiForRendering * xscale, this->dpiForRendering * yscale,
mDocument->displayPageSlice(mSplashHistorical, pageNumber, this->dpiForRendering * xscale, this->dpiForRendering * yscale,
rotation, useMediaBox, crop, printing, mSliceX, mSliceY, sliceW, sliceH);
}
mpSplashBitmap = mSplash->getBitmap();
mpSplashBitmapHistorical = mSplashHistorical->getBitmap();
}
return new QImage(mpSplashBitmap->getDataPtr(), mpSplashBitmap->getWidth(), mpSplashBitmap->getHeight(), mpSplashBitmap->getWidth() * 3, QImage::Format_RGB888);
return new QImage(mpSplashBitmapHistorical->getDataPtr(), mpSplashBitmapHistorical->getWidth(), mpSplashBitmapHistorical->getHeight(), mpSplashBitmapHistorical->getWidth() * 3, QImage::Format_RGB888);
}
#else
void XPDFRenderer::render(QPainter *p, int pageNumber, const QRectF &bounds)
{
Q_UNUSED(bounds);
if (isValid())
{
if (m_pdfZoomCache.size() > 0)
{
qreal xscale = p->worldTransform().m11();
qreal yscale = p->worldTransform().m22();
@ -270,9 +253,9 @@ void XPDFRenderer::render(QPainter *p, int pageNumber, const QRectF &bounds)
int zoomIndex = 0;
bool foundIndex = false;
for (; zoomIndex < NbrZoomCache && !foundIndex;)
for (; zoomIndex < m_pdfZoomCache.size() && !foundIndex;)
{
if (xscale <= m_cache[zoomIndex].ratio) {
if (xscale <= m_pdfZoomCache[zoomIndex].ratio) {
foundIndex = true;
} else {
zoomIndex++;
@ -282,10 +265,11 @@ void XPDFRenderer::render(QPainter *p, int pageNumber, const QRectF &bounds)
if (!foundIndex) // Use the previous one.
zoomIndex--;
QImage const &pdfImage = createPDFImage(pageNumber, m_cache[zoomIndex]);
QImage const &pdfImage = createPDFImageCached(pageNumber, m_pdfZoomCache[zoomIndex]);
QTransform savedTransform = p->worldTransform();
double const ratioDifferenceBetweenWorldAndImage = 1.0/m_cache[zoomIndex].ratio;
double const ratioDifferenceBetweenWorldAndImage = 1.0/m_pdfZoomCache[zoomIndex].ratio;
// The 'pdfImage' is rendered with a quality equal or superior. We adjust the 'transform' to zoom it
// out the required ratio.
QTransform newTransform = savedTransform.scale(ratioDifferenceBetweenWorldAndImage, ratioDifferenceBetweenWorldAndImage);
@ -293,10 +277,21 @@ void XPDFRenderer::render(QPainter *p, int pageNumber, const QRectF &bounds)
p->drawImage(QPointF( mSliceX, mSliceY), pdfImage);
p->setWorldTransform(savedTransform);
} else {
qreal xscale = p->worldTransform().m11();
qreal yscale = p->worldTransform().m22();
QImage *pdfImage = createPDFImageHistorical(pageNumber, xscale, yscale, bounds);
QTransform savedTransform = p->worldTransform();
p->resetTransform();
p->drawImage(QPointF(savedTransform.dx() + mSliceX, savedTransform.dy() + mSliceY), *pdfImage);
p->setWorldTransform(savedTransform);
delete pdfImage;
}
}
}
QImage& XPDFRenderer::createPDFImage(int pageNumber, TypeCacheData &cacheData)
QImage& XPDFRenderer::createPDFImageCached(int pageNumber, TypePdfZoomCacheData &cacheData)
{
if (isValid())
{
@ -306,7 +301,7 @@ QImage& XPDFRenderer::createPDFImage(int pageNumber, TypeCacheData &cacheData)
{
if(cacheData.splash != nullptr)
{
cacheData.cachedImage = QImage(); // The 'm_cachedImage' uses a buffer from 'mSplash'.
cacheData.cachedImage = QImage(); // The 'm_pdfZoomCachedImage' uses a buffer from 'mSplash'.
delete cacheData.splash;
}
cacheData.splash = new SplashOutputDev(splashModeRGB8, 1, false, paperColor);
@ -339,4 +334,3 @@ QImage& XPDFRenderer::createPDFImage(int pageNumber, TypeCacheData &cacheData)
return cacheData.cachedImage;
}
#endif

37
src/pdf/XPDFRenderer.h
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@ -51,9 +51,6 @@
class PDFDoc;
#define XPDFRENDERER_CACHE_ZOOM_IMAGE
//#define XPDFRENDERER_CACHE_ZOOM_WITH_LOSS
class XPDFRenderer : public PDFRenderer
{
Q_OBJECT
@ -77,20 +74,10 @@ class XPDFRenderer : public PDFRenderer
private:
void init();
#ifdef XPDFRENDERER_CACHE_ZOOM_IMAGE
enum {
#ifndef XPDFRENDERER_CACHE_ZOOM_WITH_LOSS
NbrZoomCache = 3
#else //XPDFRENDERER_CACHE_ZOOM_WITH_LOSS
NbrZoomCache = 1
#endif //XPDFRENDERER_CACHE_ZOOM_WITH_LOSS
};
class TypeCacheData {
public:
TypeCacheData(double const a_ratio) : splashBitmap(nullptr), cachedPageNumber(-1), splash(nullptr), ratio(a_ratio) {};
~TypeCacheData() {};
struct TypePdfZoomCacheData {
TypePdfZoomCacheData(double const a_ratio) : splashBitmap(nullptr), cachedPageNumber(-1), splash(nullptr), ratio(a_ratio) {};
~TypePdfZoomCacheData() {};
SplashBitmap* splashBitmap;
QImage cachedImage;
int cachedPageNumber;
@ -98,16 +85,18 @@ class XPDFRenderer : public PDFRenderer
double const ratio;
};
QImage &createPDFImage(int pageNumber, TypeCacheData &cacheData);
QImage &createPDFImageCached(int pageNumber, TypePdfZoomCacheData &cacheData);
QImage* createPDFImageHistorical(int pageNumber, qreal xscale, qreal yscale, const QRectF &bounds);
static const double sRatioZoomRendering[NbrZoomCache];
QVector<TypeCacheData> m_cache;
#else
QImage* createPDFImage(int pageNumber, qreal xscale = 0.5, qreal yscale = 0.5, const QRectF &bounds = QRectF());
// Used when 'ZoomBehavior == 1 or 2'.
// =1 has only x3 zoom in cache (= loss if user zoom > 3.0).
// =2, has 2.5, 5 and 10 (= no loss, but a bit slower).
QVector<TypePdfZoomCacheData> m_pdfZoomCache;
SplashBitmap* mpSplashBitmap;
SplashOutputDev* mSplash;
#endif
// Used when 'ZoomBehavior == 0' (no cache).
SplashBitmap* mpSplashBitmapHistorical;
// Used when 'ZoomBehavior == 0' (no cache).
SplashOutputDev* mSplashHistorical;
PDFDoc *mDocument;
static QAtomicInt sInstancesCount;

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