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Issue #108: Add accessibility options in pdf reader

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Jakub Melka
2023-11-18 18:52:18 +01:00
parent 2408c61b5f
commit 6f6ddaab04
23 changed files with 600 additions and 89 deletions
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38
Pdf4QtLib/sources/pdfrenderer.h
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@ -23,6 +23,7 @@
#include "pdfoperationcontrol.h"
#include "pdfmeshqualitysettings.h"
#include "pdfutils.h"
#include "pdfcolorconvertor.h"
#include <QMutex>
#include <QSemaphore>
@ -76,19 +77,24 @@ public:
enum Feature
{
None = 0x0000,
Antialiasing = 0x0001, ///< Antialiasing for lines, shapes, etc.
TextAntialiasing = 0x0002, ///< Antialiasing for drawing text
SmoothImages = 0x0004, ///< Adjust images to the device space using smooth transformation (slower, but better image quality)
IgnoreOptionalContent = 0x0008, ///< Ignore optional content (so all is drawn ignoring settings of optional content)
ClipToCropBox = 0x0010, ///< Clip page content to crop box (items outside crop box will not be visible)
DisplayTimes = 0x0020, ///< Display page compile/draw time
DebugTextBlocks = 0x0040, ///< Debug text block layout algorithm
DebugTextLines = 0x0080, ///< Debug text line layout algorithm
InvertColors = 0x0100, ///< Invert colors
DenyExtraGraphics = 0x0200, ///< Do not display additional graphics, for example from tools
DisplayAnnotations = 0x0400, ///< Display annotations
LogicalSizeZooming = 0x0800, ///< Use logical pixel resolution instead of physical one when zooming
None = 0x0000,
Antialiasing = 0x0001, ///< Antialiasing for lines, shapes, etc.
TextAntialiasing = 0x0002, ///< Antialiasing for drawing text
SmoothImages = 0x0004, ///< Adjust images to the device space using smooth transformation (slower, but better image quality)
IgnoreOptionalContent = 0x0008, ///< Ignore optional content (so all is drawn ignoring settings of optional content)
ClipToCropBox = 0x0010, ///< Clip page content to crop box (items outside crop box will not be visible)
DisplayTimes = 0x0020, ///< Display page compile/draw time
DebugTextBlocks = 0x0040, ///< Debug text block layout algorithm
DebugTextLines = 0x0080, ///< Debug text line layout algorithm
DenyExtraGraphics = 0x0100, ///< Do not display additional graphics, for example from tools
DisplayAnnotations = 0x0200, ///< Display annotations
LogicalSizeZooming = 0x0400, ///< Use logical pixel resolution instead of physical one when zooming
ColorAdjust_Invert = 0x0800, ///< Invert colors
ColorAdjust_Grayscale = 0x1000, ///< Convert colors to grayscale
ColorAdjust_HighContrast = 0x2000, ///< Convert colors to high constrast colors
ColorAdjust_Bitonal = 0x4000, ///< Convert colors to bitonal (monochromatic)
ColorAdjust_CustomColors = 0x8000, ///< Convert colors to custom color settings
};
Q_DECLARE_FLAGS(Features, Feature)
@ -137,9 +143,15 @@ public:
const QRectF& rectangle,
PageRotation rotation);
/// Applies rendering flags to the color convertor
static void applyFeaturesToColorConvertor(const Features& features, PDFColorConvertor& convertor);
/// Returns default renderer features
static constexpr Features getDefaultFeatures() { return Features(Antialiasing | TextAntialiasing | ClipToCropBox | DisplayAnnotations); }
/// Returns color transformation features
static constexpr Features getColorFeatures() { return Features(ColorAdjust_Invert | ColorAdjust_Grayscale | ColorAdjust_HighContrast | ColorAdjust_Bitonal | ColorAdjust_CustomColors); }
const PDFOperationControl* getOperationControl() const;
void setOperationControl(const PDFOperationControl* newOperationControl);