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Ink management in output preview

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Jakub Melka
2021-02-14 18:38:53 +01:00
parent 9da1efe4ef
commit e63d5aa242
5 changed files with 483 additions and 25 deletions
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185
Pdf4QtLib/sources/pdftransparencyrenderer.cpp
View File

@@ -641,6 +641,9 @@ void PDFTransparencyRenderer::beginPaint(QSize pixelSize)
}
m_pageTransparencyGroupGuard.reset(new PDFTransparencyGroupGuard(this, qMove(transparencyGroup)));
m_transparencyGroupDataStack.back().filterColorsUsingMask = (m_settings.flags.testFlag(PDFTransparencyRendererSettings::ActiveColorMask) &&
m_settings.activeColorMask != PDFPixelFormat::getAllColorsMask());
m_transparencyGroupDataStack.back().activeColorMask = m_settings.activeColorMask;
}
const PDFFloatBitmap& PDFTransparencyRenderer::endPaint()
@@ -1093,6 +1096,28 @@ void PDFTransparencyRenderer::performEndTransparencyGroup(ProcessOrder order, co
PDFTransparencyGroupPainterData sourceData = qMove(m_transparencyGroupDataStack.back());
m_transparencyGroupDataStack.pop_back();
// Filter inactive colors - clear all colors in immediate mask,
// which are set to inactive.
if (sourceData.filterColorsUsingMask)
{
const PDFPixelFormat pixelFormat = sourceData.immediateBackdrop.getPixelFormat();
const uint32_t colorChannelStart = pixelFormat.getColorChannelIndexStart();
const uint32_t colorChannelEnd = pixelFormat.getColorChannelIndexEnd();
const uint32_t processColorChannelEnd = pixelFormat.getProcessColorChannelIndexEnd();
for (uint32_t colorChannelIndex = colorChannelStart; colorChannelIndex < colorChannelEnd; ++colorChannelIndex)
{
const uint32_t flag = 1 << colorChannelIndex;
if (!(sourceData.activeColorMask & flag))
{
const bool isProcessColor = colorChannelIndex < processColorChannelEnd;
const bool isSubtractive = isProcessColor ? pixelFormat.hasProcessColorsSubtractive() : pixelFormat.hasSpotColorsSubtractive();
sourceData.immediateBackdrop.fillChannel(colorChannelIndex, isSubtractive ? 0.0f : 1.0f);
}
}
}
PDFTransparencyGroupPainterData& targetData = m_transparencyGroupDataStack.back();
sourceData.immediateBackdrop.convertToColorSpace(getCMS(), targetData.renderingIntent, targetData.blendColorSpace, this);
@@ -1429,6 +1454,118 @@ PDFInkMapper::PDFInkMapper(const PDFDocument* document) :
}
std::vector<PDFInkMapper::ColorInfo> PDFInkMapper::getSeparations(uint32_t processColorCount) const
{
std::vector<ColorInfo> result;
result.reserve(getActiveSpotColorCount() + processColorCount);
switch (processColorCount)
{
case 1:
{
ColorInfo gray;
gray.name = "Process Gray";
gray.textName = PDFTranslationContext::tr("Process Gray");
gray.canBeActive = true;
gray.active = true;
gray.isSpot = false;
result.emplace_back(qMove(gray));
break;
}
case 3:
{
ColorInfo red;
red.name = "Process Red";
red.textName = PDFTranslationContext::tr("Process Red");
red.canBeActive = true;
red.active = true;
red.isSpot = false;
result.emplace_back(qMove(red));
ColorInfo green;
green.name = "Process Green";
green.textName = PDFTranslationContext::tr("Process Green");
green.canBeActive = true;
green.active = true;
green.isSpot = false;
result.emplace_back(qMove(green));
ColorInfo blue;
blue.name = "Process Blue";
blue.textName = PDFTranslationContext::tr("Process Blue");
blue.canBeActive = true;
blue.active = true;
blue.isSpot = false;
result.emplace_back(qMove(blue));
break;
}
case 4:
{
ColorInfo cyan;
cyan.name = "Process Cyan";
cyan.textName = PDFTranslationContext::tr("Process Cyan");
cyan.canBeActive = true;
cyan.active = true;
cyan.isSpot = false;
result.emplace_back(qMove(cyan));
ColorInfo magenta;
magenta.name = "Process Magenta";
magenta.textName = PDFTranslationContext::tr("Process Magenta");
magenta.canBeActive = true;
magenta.active = true;
magenta.isSpot = false;
result.emplace_back(qMove(magenta));
ColorInfo yellow;
yellow.name = "Process Yellow";
yellow.textName = PDFTranslationContext::tr("Process Yellow");
yellow.canBeActive = true;
yellow.active = true;
yellow.isSpot = false;
result.emplace_back(qMove(yellow));
ColorInfo black;
black.name = "Process Black";
black.textName = PDFTranslationContext::tr("Process Black");
black.canBeActive = true;
black.active = true;
black.isSpot = false;
result.emplace_back(qMove(black));
break;
}
default:
{
for (uint32_t i = 0; i < processColorCount; ++i)
{
ColorInfo generic;
generic.textName = PDFTranslationContext::tr("Process Generic%1").arg(i + 1);
generic.name = generic.textName.toLatin1();
generic.canBeActive = true;
generic.active = true;
generic.isSpot = false;
result.emplace_back(qMove(generic));
}
}
}
for (const auto& spotColor : m_spotColors)
{
if (!spotColor.active)
{
// Skip inactive spot colors
continue;
}
result.emplace_back(spotColor);
}
return result;
}
void PDFInkMapper::createSpotColors(bool activate)
{
m_spotColors.clear();
@@ -1477,8 +1614,9 @@ void PDFInkMapper::createSpotColors(bool activate)
const QByteArray& colorName = separationColorSpace->getColorName();
if (!containsSpotColor(colorName))
{
SpotColorInfo info;
ColorInfo info;
info.name = colorName;
info.textName = PDFEncoding::convertTextString(info.name);
info.colorSpace = colorSpacePointer;
info.spotColorIndex = uint32_t(m_spotColors.size());
m_spotColors.emplace_back(qMove(info));
@@ -1500,8 +1638,9 @@ void PDFInkMapper::createSpotColors(bool activate)
const PDFDeviceNColorSpace::ColorantInfo& colorantInfo = colorants[i];
if (!containsSpotColor(colorantInfo.name))
{
SpotColorInfo info;
ColorInfo info;
info.name = colorantInfo.name;
info.textName = PDFEncoding::convertTextString(info.name);
info.colorSpaceIndex = uint32_t(i);
info.colorSpace = colorSpacePointer;
info.spotColorIndex = uint32_t(m_spotColors.size());
@@ -1521,15 +1660,13 @@ void PDFInkMapper::createSpotColors(bool activate)
}
}
if (activate)
size_t minIndex = qMin<uint32_t>(uint32_t(m_spotColors.size()), MAX_SPOT_COLOR_COMPONENTS);
for (size_t i = 0; i < minIndex; ++i)
{
size_t minIndex = qMin<uint32_t>(uint32_t(m_spotColors.size()), MAX_SPOT_COLOR_COMPONENTS);
for (size_t i = 0; i < minIndex; ++i)
{
m_spotColors[i].active = true;
}
m_activeSpotColors = minIndex;
m_spotColors[i].canBeActive = true;
}
setSpotColorsActive(activate);
}
bool PDFInkMapper::containsSpotColor(const QByteArray& colorName) const
@@ -1537,7 +1674,7 @@ bool PDFInkMapper::containsSpotColor(const QByteArray& colorName) const
return getSpotColor(colorName) != nullptr;
}
const PDFInkMapper::SpotColorInfo* PDFInkMapper::getSpotColor(const QByteArray& colorName) const
const PDFInkMapper::ColorInfo* PDFInkMapper::getSpotColor(const QByteArray& colorName) const
{
auto it = std::find_if(m_spotColors.cbegin(), m_spotColors.cend(), [&colorName](const auto& info) { return info.name == colorName; });
if (it != m_spotColors.cend())
@@ -1548,6 +1685,30 @@ const PDFInkMapper::SpotColorInfo* PDFInkMapper::getSpotColor(const QByteArray&
return nullptr;
}
void PDFInkMapper::setSpotColorsActive(bool active)
{
m_activeSpotColors = 0;
if (active)
{
for (auto& spotColor : m_spotColors)
{
if (spotColor.canBeActive)
{
spotColor.active = true;
++m_activeSpotColors;
}
}
}
else
{
for (auto& spotColor : m_spotColors)
{
spotColor.active = false;
}
}
}
PDFInkMapping PDFInkMapper::createMapping(const PDFAbstractColorSpace* sourceColorSpace,
const PDFAbstractColorSpace* targetColorSpace,
PDFPixelFormat targetPixelFormat) const
@@ -1590,7 +1751,7 @@ PDFInkMapping PDFInkMapper::createMapping(const PDFAbstractColorSpace* sourceCol
else if (!separationColorSpace->isNone() && !separationColorSpace->getColorName().isEmpty())
{
const QByteArray& colorName = separationColorSpace->getColorName();
const SpotColorInfo* info = getSpotColor(colorName);
const ColorInfo* info = getSpotColor(colorName);
if (info && info->active && targetPixelFormat.hasSpotColors() && info->spotColorIndex < targetPixelFormat.getSpotColorChannelCount())
{
mapping.map(0, uint8_t(targetPixelFormat.getSpotColorChannelIndexStart() + info->spotColorIndex));
@@ -1610,7 +1771,7 @@ PDFInkMapping PDFInkMapper::createMapping(const PDFAbstractColorSpace* sourceCol
for (size_t i = 0; i < colorants.size(); ++i)
{
const PDFDeviceNColorSpace::ColorantInfo& colorantInfo = colorants[i];
const SpotColorInfo* info = getSpotColor(colorantInfo.name);
const ColorInfo* info = getSpotColor(colorantInfo.name);
if (info && info->active && targetPixelFormat.hasSpotColors() && info->spotColorIndex < targetPixelFormat.getSpotColorChannelCount())
{

35
Pdf4QtLib/sources/pdftransparencyrenderer.h
View File

@@ -97,6 +97,8 @@ public:
static constexpr PDFPixelFormat removeSpotColors(PDFPixelFormat format) { return PDFPixelFormat(format.getProcessColorChannelCount(), 0, format.getFlags()); }
static constexpr PDFPixelFormat removeShapeAndOpacity(PDFPixelFormat format) { return PDFPixelFormat(format.getProcessColorChannelCount(), format.getSpotColorChannelCount(), format.hasProcessColorsSubtractive() ? FLAG_PROCESS_COLORS_SUBTRACTIVE : 0); }
static constexpr uint32_t getAllColorsMask() { return 0xFFFF; }
static constexpr PDFPixelFormat createFormat(uint8_t processColors, uint8_t spotColors, bool withShapeAndOpacity, bool processColorSubtractive)
{
return PDFPixelFormat(processColors, spotColors, (withShapeAndOpacity ? FLAG_HAS_SHAPE_CHANNEL + FLAG_HAS_OPACITY_CHANNEL : 0) + (processColorSubtractive ? FLAG_PROCESS_COLORS_SUBTRACTIVE : 0));
@@ -277,19 +279,28 @@ class Pdf4QtLIBSHARED_EXPORT PDFInkMapper
public:
explicit PDFInkMapper(const PDFDocument* document);
struct SpotColorInfo
struct ColorInfo
{
QByteArray name;
QString textName;
uint32_t spotColorIndex = 0; ///< Index of this spot color
uint32_t colorSpaceIndex = 0; ///< Index into DeviceN color space (index of colorant)
PDFColorSpacePointer colorSpace;
bool canBeActive = false; ///< Can spot color be activated?
bool active = false; ///< Is spot color active?
bool isSpot = true;
};
static constexpr const uint32_t MAX_COLOR_COMPONENTS = PDF_MAX_COLOR_COMPONENTS;
static constexpr const uint32_t MAX_DEVICE_COLOR_COMPONENTS = 4;
static constexpr const uint32_t MAX_SPOT_COLOR_COMPONENTS = MAX_COLOR_COMPONENTS - MAX_DEVICE_COLOR_COMPONENTS - 2;
/// Returns a vector of separations correspoding to the process colors
/// and spot colors. Only active spot colors are added. Only 1, 3 and 4
/// process colors are supported.
/// \param processColorCount Process color count
std::vector<ColorInfo> getSeparations(uint32_t processColorCount) const;
/// Scan document for spot colors and fills color info
/// \param activate Set spot colors active?
void createSpotColors(bool activate);
@@ -303,7 +314,11 @@ public:
/// Returns spot color information (or nullptr, if spot color is not present)
/// \param colorName Color name
const SpotColorInfo* getSpotColor(const QByteArray& colorName) const;
const ColorInfo* getSpotColor(const QByteArray& colorName) const;
/// Activates / deactivates spot colors
/// \param active Make spot colors active?
void setSpotColorsActive(bool active);
/// Creates color mapping from source color space to the target color space.
/// If mapping cannot be created, then invalid mapping is returned. Target
@@ -318,7 +333,7 @@ public:
private:
const PDFDocument* m_document;
std::vector<SpotColorInfo> m_spotColors;
std::vector<ColorInfo> m_spotColors;
size_t m_activeSpotColors = 0;
};
@@ -456,13 +471,23 @@ struct PDFTransparencyRendererSettings
/// Use multithreading when painter paths are painted?
/// Multithreading is used to
MultithreadedPathSampler = 0x0002
MultithreadedPathSampler = 0x0002,
/// When using CMYK process color space, transfer spot
/// colors to the CMYK color space.
SeparationSimulation = 0x0004,
/// Use active color mask
ActiveColorMask = 0x0008
};
Q_DECLARE_FLAGS(Flags, Flag)
/// Flags
Flags flags = None;
/// Active color mask
uint32_t activeColorMask = PDFPixelFormat::getAllColorsMask();
};
/// Renders PDF pages with transparency, using 32-bit floating point precision.
@@ -550,6 +575,8 @@ private:
PDFFloatBitmapWithColorSpace immediateBackdrop; ///< Immediate backdrop
PDFFloatBitmap softMask; ///< Soft mask for this group
PDFColorSpacePointer blendColorSpace;
bool filterColorsUsingMask = false;
uint32_t activeColorMask = PDFPixelFormat::getAllColorsMask();
};
struct PDFTransparencyPainterState