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Create mapped color

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Jakub Melka
2021-02-05 19:45:58 +01:00
parent 975bdba6f6
commit 3fdbcfb4c5
2 changed files with 291 additions and 4 deletions
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61
Pdf4QtLib/sources/pdftransparencyrenderer.h
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@ -22,6 +22,7 @@
#include "pdfcolorspaces.h"
#include "pdfpagecontentprocessor.h"
#include "pdfconstants.h"
#include "pdfutils.h"
namespace pdf
{
@ -236,6 +237,29 @@ private:
PDFColorSpacePointer m_colorSpace;
};
/// Ink mapping
struct PDFInkMapping
{
inline bool isValid() const { return !mapping.empty(); }
inline void reserve(size_t size) { mapping.reserve(size); }
inline void map(uint8_t source, uint8_t target) { mapping.emplace_back(Mapping{ source, target, Pass}); activeChannels |= 1 << target; }
enum Type
{
Pass
};
struct Mapping
{
uint8_t source = 0;
uint8_t target = 0;
Type type = Pass;
};
std::vector<Mapping> mapping;
uint32_t activeChannels = 0;
};
/// Ink mapper for mapping device inks (device colors) and spot inks (spot colors).
class Pdf4QtLIBSHARED_EXPORT PDFInkMapper
{
@ -245,7 +269,8 @@ public:
struct SpotColorInfo
{
QByteArray name;
uint32_t index = 0; ///< Index into DeviceN color space (index of colorant)
uint32_t spotColorIndex = 0; ///< Index of this spot color
uint32_t colorSpaceIndex = 0; ///< Index into DeviceN color space (index of colorant)
PDFColorSpacePointer colorSpace;
bool active = false; ///< Is spot color active?
};
@ -269,6 +294,17 @@ public:
/// \param colorName Color name
const SpotColorInfo* getSpotColor(const QByteArray& colorName) const;
/// Creates color mapping from source color space to the target color space.
/// If mapping cannot be created, then invalid mapping is returned. Target
/// color space must be blending color space and must correspond to active
/// blending space, if used when painting.
/// \param sourceColorSpace Source color space
/// \param targetColorSpace Target color space
/// \param targetPixelFormat
PDFInkMapping createMapping(const PDFAbstractColorSpace* sourceColorSpace,
const PDFAbstractColorSpace* targetColorSpace,
PDFPixelFormat targetPixelFormat) const;
private:
const PDFDocument* m_document;
@ -352,8 +388,23 @@ private:
QPainterPath clipPath; ///< Clipping path in device state coordinates
};
struct PDFMappedColor
{
PDFColor mappedColor;
uint32_t activeChannels = 0;
};
void invalidateCachedItems();
void removeInitialBackdrop();
void fillMappedColorUsingMapping(const PDFPixelFormat pixelFormat,
PDFMappedColor& result,
const PDFInkMapping& inkMapping,
const PDFColor& sourceColor);
PDFMappedColor createMappedColor(const PDFColor& sourceColor,
const PDFAbstractColorSpace* sourceColorSpace);
PDFFloatBitmapWithColorSpace* getInitialBackdrop();
PDFFloatBitmapWithColorSpace* getImmediateBackdrop();
PDFFloatBitmapWithColorSpace* getBackdrop();
@ -364,6 +415,12 @@ private:
bool isTransparencyGroupIsolated() const;
bool isTransparencyGroupKnockout() const;
const PDFMappedColor& getMappedStrokeColor();
const PDFMappedColor& getMappedFillColor();
PDFMappedColor getMappedStrokeColorImpl();
PDFMappedColor getMappedFillColorImpl();
PDFColorSpacePointer m_deviceColorSpace; ///< Device color space (color space for final result)
PDFColorSpacePointer m_processColorSpace; ///< Process color space (color space, in which is page graphic's blended)
std::unique_ptr<PDFTransparencyGroupGuard> m_pageTransparencyGroupGuard;
@ -371,6 +428,8 @@ private:
std::stack<PDFTransparencyPainterState> m_painterStateStack;
const PDFInkMapper* m_inkMapper;
bool m_active;
PDFCachedItem<PDFMappedColor> m_mappedStrokeColor;
PDFCachedItem<PDFMappedColor> m_mappedFillColor;
};
} // namespace pdf