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Proper active color masking

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This commit is contained in:
Jakub Melka
2021-02-17 19:44:57 +01:00
parent 20f4e7f554
commit 63218a40dd
2 changed files with 143 additions and 79 deletions
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49
Pdf4QtLib/sources/pdftransparencyrenderer.h
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@ -50,6 +50,7 @@ public:
constexpr bool hasOpacityChannel() const { return m_flags & FLAG_HAS_OPACITY_CHANNEL; }
constexpr bool hasProcessColorsSubtractive() const { return m_flags & FLAG_PROCESS_COLORS_SUBTRACTIVE; }
constexpr bool hasSpotColorsSubtractive() const { return true; }
constexpr bool hasActiveColorMask() const { return m_flags & FLAG_HAS_ACTIVE_COLOR_MASK; }
constexpr uint8_t getFlags() const { return m_flags; }
constexpr uint8_t getMaximalColorChannelCount() const { return 32; }
@ -89,9 +90,9 @@ public:
}
static constexpr PDFPixelFormat createOpacityMask() { return PDFPixelFormat(0, 0, FLAG_HAS_OPACITY_CHANNEL); }
static constexpr PDFPixelFormat createFormatDefaultGray(uint8_t spotColors) { return createFormat(1, spotColors, true, false); }
static constexpr PDFPixelFormat createFormatDefaultRGB(uint8_t spotColors) { return createFormat(3, spotColors, true, false); }
static constexpr PDFPixelFormat createFormatDefaultCMYK(uint8_t spotColors) { return createFormat(4, spotColors, true, true); }
static constexpr PDFPixelFormat createFormatDefaultGray(uint8_t spotColors) { return createFormat(1, spotColors, true, false, false); }
static constexpr PDFPixelFormat createFormatDefaultRGB(uint8_t spotColors) { return createFormat(3, spotColors, true, false, false); }
static constexpr PDFPixelFormat createFormatDefaultCMYK(uint8_t spotColors) { return createFormat(4, spotColors, true, true, false); }
static constexpr PDFPixelFormat removeProcessColors(PDFPixelFormat format) { return PDFPixelFormat(0, format.getSpotColorChannelCount(), format.getFlags()); }
static constexpr PDFPixelFormat removeSpotColors(PDFPixelFormat format) { return PDFPixelFormat(format.getProcessColorChannelCount(), 0, format.getFlags()); }
@ -99,9 +100,12 @@ public:
static constexpr uint32_t getAllColorsMask() { return 0xFFFF; }
static constexpr PDFPixelFormat createFormat(uint8_t processColors, uint8_t spotColors, bool withShapeAndOpacity, bool processColorSubtractive)
static constexpr PDFPixelFormat createFormat(uint8_t processColors, uint8_t spotColors, bool withShapeAndOpacity, bool processColorSubtractive, bool hasActiveColorMask)
{
return PDFPixelFormat(processColors, spotColors, (withShapeAndOpacity ? FLAG_HAS_SHAPE_CHANNEL + FLAG_HAS_OPACITY_CHANNEL : 0) + (processColorSubtractive ? FLAG_PROCESS_COLORS_SUBTRACTIVE : 0));
const uint8_t flags = (withShapeAndOpacity ? FLAG_HAS_SHAPE_CHANNEL + FLAG_HAS_OPACITY_CHANNEL : 0) +
(processColorSubtractive ? FLAG_PROCESS_COLORS_SUBTRACTIVE : 0) +
(hasActiveColorMask ? FLAG_HAS_ACTIVE_COLOR_MASK : 0);
return PDFPixelFormat(processColors, spotColors, flags);
}
/// Calculates bitmap data length required to store bitmapt with given pixel format.
@ -121,6 +125,7 @@ private:
constexpr static uint8_t FLAG_HAS_SHAPE_CHANNEL = 0x01;
constexpr static uint8_t FLAG_HAS_OPACITY_CHANNEL = 0x02;
constexpr static uint8_t FLAG_PROCESS_COLORS_SUBTRACTIVE = 0x04;
constexpr static uint8_t FLAG_HAS_ACTIVE_COLOR_MASK = 0x08;
uint8_t m_processColors = 0;
uint8_t m_spotColors = 0;
@ -176,6 +181,30 @@ public:
/// \param y Vertical coordinate of the pixel
size_t getPixelIndex(size_t x, size_t y) const;
/// Returns true, if bitmap has active color mask
bool hasActiveColorMask() const { return !m_activeColorMask.empty(); }
/// Get color mask for given pixel. This function must be called
/// only on bitmaps, which use active color mask.
/// \param x Horizontal coordinate of the pixel
/// \param y Vertical coordinate of the pixel
uint32_t getPixelActiveColorMask(size_t x, size_t y) const;
/// Marks active color channels for given pixel as active
/// \param x Horizontal coordinate of the pixel
/// \param y Vertical coordinate of the pixel
/// \param activeColorMask Active color mask
void markPixelActiveColorMask(size_t x, size_t y, uint32_t activeColorMask);
/// Sets active color channels for given pixel
/// \param x Horizontal coordinate of the pixel
/// \param y Vertical coordinate of the pixel
/// \param activeColorMask Active color mask
void setPixelActiveColorMask(size_t x, size_t y, uint32_t activeColorMask);
/// Sets all colors as active
void setAllColorActive();
/// Extract process colors into another bitmap
PDFFloatBitmap extractProcessColors() const;
@ -204,7 +233,6 @@ public:
/// \param alphaIsShape Both soft mask and constant alpha are shapes and not opacity?
/// \param constantAlpha Constant alpha, can mean shape or opacity
/// \param mode Blend mode
/// \param activeColorChannels Active color channels
/// \param overprintMode Overprint mode
/// \param blendRegion Blend region
static void blend(const PDFFloatBitmap& source,
@ -216,7 +244,6 @@ public:
PDFColorComponent constantAlpha,
BlendMode mode,
bool knockoutGroup,
uint32_t activeColorChannels,
OverprintMode overprintMode,
QRect blendRegion);
@ -234,6 +261,7 @@ private:
std::size_t m_height;
std::size_t m_pixelSize;
std::vector<PDFColorComponent> m_data;
std::vector<uint32_t> m_activeColorMask;
};
/// Float bitmap with color space
@ -436,9 +464,6 @@ class PDFDrawBuffer : public PDFFloatBitmap
public:
using PDFFloatBitmap::PDFFloatBitmap;
/// Marks color channels as active
void markActiveColors(uint32_t activeColors);
/// Clears the draw buffer
void clear();
@ -448,9 +473,6 @@ public:
/// Returns true, if draw buffer is modified and needs to be flushed
bool isModified() const { return m_modifiedRect.isValid(); }
/// Returns active colors
uint32_t getActiveColors() const { return m_activeColors; }
/// Returns modified rectangle
QRect getModifiedRect() const { return m_modifiedRect; }
@ -458,7 +480,6 @@ public:
bool isContainsStroking() const { return m_containsStroking; }
private:
uint32_t m_activeColors = 0;
bool m_containsFilling = false;
bool m_containsStroking = false;
QRect m_modifiedRect;