File indexing completed on 2024-06-16 04:12:11

 /*
  *  SPDX-FileCopyrightText: 2014 Dmitry Kazakov <dimula73@gmail.com>
  *
  *  See LayerFX plugin for Gimp as a reference implementation of this style:
  *  http://registry.gimp.org/node/186
  *
  *  SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #include "kis_ls_bevel_emboss_filter.h"
 
 #include <cstdlib>
 
 #include <QBitArray>
 
 #include <KoUpdater.h>
 #include <resources/KoPattern.h>
 
 #include <resources/KoAbstractGradient.h>
 
 #include "psd.h"
 
 #include "kis_convolution_kernel.h"
 #include "kis_convolution_painter.h"
 #include "kis_gaussian_kernel.h"
 
 #include "kis_pixel_selection.h"
 #include "kis_fill_painter.h"
 #include "kis_gradient_painter.h"
 #include "kis_iterator_ng.h"
 #include "kis_random_accessor_ng.h"
 
 #include "kis_psd_layer_style.h"
 #include "kis_layer_style_filter_environment.h"
 
 #include "kis_ls_utils.h"
 
 #include "gimp_bump_map.h"
 #include "kis_transaction.h"
 #include "kis_multiple_projection.h"
 #include "kis_cached_paint_device.h"
 
 
 KisLsBevelEmbossFilter::KisLsBevelEmbossFilter()
     : KisLayerStyleFilter(KoID("lsstroke", i18n("Stroke (style)")))
 {
 }
 
 KisLayerStyleFilter *KisLsBevelEmbossFilter::clone() const
 {
     return new KisLsBevelEmbossFilter(*this);
 }
 
 KisLsBevelEmbossFilter::KisLsBevelEmbossFilter(const KisLsBevelEmbossFilter &rhs)
     : KisLayerStyleFilter(rhs)
 {
 }
 
 void paintBevelSelection(KisPixelSelectionSP srcSelection,
                          KisPixelSelectionSP dstSelection,
                          const QRect &applyRect,
                          int size,
                          int initialSize,
                          bool invert,
                          KisLayerStyleFilterEnvironment *env)
 {
     KisCachedSelection::Guard s1(*env->cachedSelection());
     KisSelectionSP tmpBaseSelection = s1.selection();
     KisPixelSelectionSP tmpSelection = tmpBaseSelection->pixelSelection();
 
     // NOTE: we are not using createCompositionSourceDevice() intentionally,
     //       because the source device doesn't have alpha channel
     KisCachedSelection::Guard s2(*env->cachedSelection());
     KisPixelSelectionSP fillDevice = s2.selection()->pixelSelection();
 
     KisPainter gc(dstSelection);
     gc.setCompositeOpId(COMPOSITE_COPY);
 
     for (int i = 0; i < size; i++) {
         const int growSize = initialSize - i - 1;
 
         quint8 selectedness = invert ?
             qRound(qreal(size - i - 1) / size * 255.0) :
             qRound(qreal(i + 1) / size * 255.0);
         fillDevice->setDefaultPixel(KoColor(&selectedness, fillDevice->colorSpace()));
 
         tmpSelection->makeCloneFromRough(srcSelection, srcSelection->selectedRect());
 
         QRect changeRect = KisLsUtils::growSelectionUniform(tmpSelection, growSize, applyRect);
 
         gc.setSelection(tmpBaseSelection);
         gc.bitBlt(changeRect.topLeft(), fillDevice, changeRect);
     }
 }
 
 struct ContrastOp {
     static const bool supportsCaching = false;
 
     ContrastOp(qreal contrast)
         : m_contrast(contrast)
     {
     }
 
     int operator() (int iValue) {
         qreal value = qreal(iValue - 127) / 127.0;
 
         qreal slant = std::tan ((m_contrast + 1) * M_PI_4);
         value = (value - 0.5) * slant + 0.5;
 
         return qRound(value * 255.0);
     }
 
 private:
     qreal m_contrast;
 };
 
 struct HighlightsFetchOp {
     static const bool supportsCaching = true;
 
     int operator() (int value) {
         return qRound(qMax(0, value - 127) * (255.0 / (255 - 127)));
     }
 };
 
 struct ShadowsFetchOp {
     static const bool supportsCaching = true;
 
     int operator() (int value) {
         return 255 - qRound(qMin(value, 127) * (255.0 / 127.0));
     }
 };
 
 template <class MapOp>
 void mapPixelValues(KisPixelSelectionSP srcSelection,
                     KisPixelSelectionSP dstSelection,
                     MapOp mapOp,
                     const QRect &applyRect)
 {
     static quint8 mapTable[256];
     static bool mapInitialized = false;
 
     if (!MapOp::supportsCaching || !mapInitialized) {
         mapInitialized = true;
 
         for (int i = 0; i < 256; i++) {
             mapTable[i] = mapOp(i);
         }
     }
 
     KisSequentialConstIterator srcIt(srcSelection, applyRect);
     KisSequentialIterator dstIt(dstSelection, applyRect);
 
     while (srcIt.nextPixel() && dstIt.nextPixel()) {
         const quint8 *srcPtr = srcIt.rawDataConst();
         quint8 *dstPtr = dstIt.rawData();
         *dstPtr = mapTable[*srcPtr];
     }
 }
 
 template <class MapOp>
 void mapPixelValues(KisPixelSelectionSP dstSelection,
                     MapOp mapOp,
                     const QRect &applyRect)
 {
     static quint8 mapTable[256];
     static bool mapInitialized = false;
 
     if (!MapOp::supportsCaching || !mapInitialized) {
         mapInitialized = true;
 
         for (int i = 0; i < 256; i++) {
             mapTable[i] = mapOp(i);
         }
     }
 
     KisSequentialIterator dstIt(dstSelection, applyRect);
 
     while (dstIt.nextPixel()) {
         quint8 *dstPtr = dstIt.rawData();
         *dstPtr = mapTable[*dstPtr];
     }
 }
 
 struct BevelEmbossRectCalculator
 {
     BevelEmbossRectCalculator(const QRect &applyRect,
                               const psd_layer_effects_bevel_emboss *config) {
 
         shadowHighlightsFinalRect = applyRect;
         applyGaussianRect = shadowHighlightsFinalRect;
         applyGlossContourRect = KisLsUtils::growRectFromRadius(applyGaussianRect, config->soften());
         applyBumpmapRect = applyGlossContourRect;
         applyContourRect = applyBumpmapRect;
         applyTextureRect = applyContourRect;
         applyBevelRect = calcBevelNeedRect(applyTextureRect, config);
         initialFetchRect = kisGrowRect(applyBevelRect, 1);
     }
 
     QRect totalChangeRect(const QRect &applyRect, const psd_layer_effects_bevel_emboss *config) {
         QRect changeRect = calcBevelChangeRect(applyRect, config);
         changeRect = kisGrowRect(changeRect, 1); // bumpmap method
         changeRect = KisLsUtils::growRectFromRadius(changeRect, config->soften());
         return changeRect;
     }
 
     QRect totalNeedRect(const QRect &applyRect, const psd_layer_effects_bevel_emboss *config) {
         QRect changeRect = applyRect;
         changeRect = KisLsUtils::growRectFromRadius(changeRect, config->soften());
         changeRect = kisGrowRect(changeRect, 1); // bumpmap method
         changeRect = calcBevelNeedRect(applyRect, config);
         return changeRect;
     }
 
     QRect initialFetchRect;
     QRect applyBevelRect;
     QRect applyTextureRect;
     QRect applyContourRect;
     QRect applyBumpmapRect;
     QRect applyGlossContourRect;
     QRect applyGaussianRect;
     QRect shadowHighlightsFinalRect;
 
 private:
     QRect calcBevelChangeRect(const QRect &applyRect, const psd_layer_effects_bevel_emboss *config) {
         const int size = config->size();
         int limitingGrowSize = 0;
 
         switch (config->style()) {
         case psd_bevel_outer_bevel:
             limitingGrowSize = size;
             break;
         case psd_bevel_inner_bevel:
             limitingGrowSize = 0;
             break;
         case psd_bevel_emboss: {
             const int initialSize = std::ceil(qreal(size) / 2.0);
             limitingGrowSize = initialSize;
             break;
         }
         case psd_bevel_pillow_emboss: {
             const int halfSizeC = std::ceil(qreal(size) / 2.0);
             limitingGrowSize = halfSizeC;
             break;
         }
         case psd_bevel_stroke_emboss:
             warnKrita << "WARNING: Stroke Emboss style is not implemented yet!";
             return applyRect;
         }
 
         return kisGrowRect(applyRect, limitingGrowSize);
     }
 
     QRect calcBevelNeedRect(const QRect &applyRect, const psd_layer_effects_bevel_emboss *config) {
         const int size = config->size();
         int limitingGrowSize = size;
 
         return kisGrowRect(applyRect, limitingGrowSize);
     }
 };
 
 void KisLsBevelEmbossFilter::applyBevelEmboss(KisPaintDeviceSP srcDevice,
                                               KisMultipleProjection *dst,
                                               const QRect &applyRect,
                                               const psd_layer_effects_bevel_emboss *config,
                                               KisResourcesInterfaceSP resourcesInterface,
                                               KisLayerStyleFilterEnvironment *env) const
 {
     if (applyRect.isEmpty()) return;
 
     BevelEmbossRectCalculator d(applyRect, config);
 
     KisCachedSelection::Guard s1(*env->cachedSelection());
     KisSelectionSP baseSelection = s1.selection();
     KisLsUtils::selectionFromAlphaChannel(srcDevice, baseSelection, d.initialFetchRect);
 
     KisPixelSelectionSP selection = baseSelection->pixelSelection();
 
     const int size = config->size();
 
     int limitingGrowSize = 0;
     KisCachedSelection::Guard s2(*env->cachedSelection());
     KisPixelSelectionSP bumpmapSelection = s2.selection()->pixelSelection();
 
     switch (config->style()) {
     case psd_bevel_outer_bevel:
         paintBevelSelection(selection, bumpmapSelection, d.applyBevelRect, size, size, false, env);
         limitingGrowSize = size;
         break;
     case psd_bevel_inner_bevel:
         paintBevelSelection(selection, bumpmapSelection, d.applyBevelRect, size, 0, false, env);
         limitingGrowSize = 0;
         break;
     case psd_bevel_emboss: {
         const int initialSize = std::ceil(qreal(size) / 2.0);
         paintBevelSelection(selection, bumpmapSelection, d.applyBevelRect, size, initialSize, false, env);
         limitingGrowSize = initialSize;
         break;
     }
     case psd_bevel_pillow_emboss: {
         const int halfSizeF = std::floor(qreal(size) / 2.0);
         const int halfSizeC = std::ceil(qreal(size) / 2.0);
         // TODO: probably not correct!
         paintBevelSelection(selection, bumpmapSelection, d.applyBevelRect, halfSizeC, halfSizeC, false, env);
         paintBevelSelection(selection, bumpmapSelection, d.applyBevelRect, halfSizeF, 0, true, env);
         limitingGrowSize = halfSizeC;
         break;
     }
     case psd_bevel_stroke_emboss:
         warnKrita << "WARNING: Stroke Emboss style is not implemented yet!";
         return;
     }
 
     KisCachedSelection::Guard s3(*env->cachedSelection());
     KisPixelSelectionSP limitingSelection = s3.selection()->pixelSelection();
     limitingSelection->makeCloneFromRough(selection, selection->selectedRect());
     {
         QRect changeRectUnused =
             KisLsUtils::growSelectionUniform(limitingSelection,
                                              limitingGrowSize,
                                              d.applyBevelRect);
         Q_UNUSED(changeRectUnused);
     }
 
     //bumpmapSelection->convertToQImage(0, QRect(0,0,300,300)).save("1_selection_xconv.png");
 
     if (config->textureEnabled()) {
         KisCachedSelection::Guard s4(*env->cachedSelection());
         KisPixelSelectionSP textureSelection = s4.selection()->pixelSelection();
 
         KisLsUtils::fillPattern(textureSelection, d.applyTextureRect, env,
                                 config->textureScale(),
                                 config->texturePattern(resourcesInterface),
                                 config->textureHorizontalPhase(),
                                 config->textureVerticalPhase(),
                                 config->textureAlignWithLayer());
 
         int contrastadj = 0;
 
         {
             using namespace std;
 
             int tex_depth = config->textureDepth();
 
             if (tex_depth >= 0.0) {
                 if (tex_depth <= 100.0) {
                     contrastadj = int(qRound((1-(tex_depth/100.0)) * -127));
                 } else {
                     contrastadj = int(qRound(((tex_depth-100.0)/900.0) * 127));
                 }
             } else {
                 textureSelection->invert();
                 if (tex_depth >= -100.0) {
                     contrastadj = int(qRound((1-(abs(tex_depth)/100.0)) * -127));
                 } else {
                     contrastadj = int(qRound(((abs(tex_depth)-100.0)/900.0) * 127));
                 }
             }
         }
 
         qreal contrast = qBound(-1.0, qreal(contrastadj) / 127.0, 1.0);
         mapPixelValues(textureSelection, ContrastOp(contrast), d.applyTextureRect);
 
         {
             KisPainter gc(bumpmapSelection);
             gc.setCompositeOpId(COMPOSITE_MULT);
             gc.bitBlt(d.applyTextureRect.topLeft(), textureSelection, d.applyTextureRect);
             gc.end();
         }
     }
 
     //bumpmapSelection->convertToQImage(0, QRect(0,0,300,300)).save("15_selection_texture.png");
 
     if (config->contourEnabled()) {
         if (config->range() != KisLsUtils::FULL_PERCENT_RANGE) {
             KisLsUtils::adjustRange(bumpmapSelection, d.applyContourRect, config->range());
         }
 
         KisLsUtils::applyContourCorrection(bumpmapSelection,
                                            d.applyContourRect,
                                            config->contourLookupTable(),
                                            config->antiAliased(),
                                            true);
     }
 
     bumpmap_vals_t bmvals;
 
     bmvals.azimuth = config->angle();
     bmvals.elevation = config->altitude();
     bmvals.depth = config->depth();
     bmvals.ambient = 0;
     bmvals.compensate = true;
     bmvals.invert = config->direction() == psd_direction_down;
     bmvals.type = LINEAR;
 
     bumpmap(bumpmapSelection, d.applyBumpmapRect, bmvals);
 
     //bumpmapSelection->convertToQImage(0, QRect(0,0,300,300)).save("3_selection_bumpmap.png");
 
     { // TODO: optimize!
 
         KisLsUtils::applyContourCorrection(bumpmapSelection,
                                            d.applyGlossContourRect,
                                            config->glossContourLookupTable(),
                                            config->glossAntiAliased(),
                                            true);
 
     }
 
     if (config->soften()) {
         KisLsUtils::applyGaussianWithTransaction(bumpmapSelection, d.applyGaussianRect, config->soften());
     }
 
 
     if (config->textureEnabled() && config->textureInvert()) {
         bumpmapSelection->invert();
     }
 
     selection->clear();
     mapPixelValues(bumpmapSelection, selection,
                    ShadowsFetchOp(), d.shadowHighlightsFinalRect);
     selection->applySelection(limitingSelection, SELECTION_INTERSECT);
 
     //dstDevice->convertToQImage(0, QRect(0,0,300,300)).save("4_dst_before_apply.png");
     //selection->convertToQImage(0, QRect(0,0,300,300)).save("4_shadows_sel.png");
 
     {
         KisPaintDeviceSP dstDevice = dst->getProjection("00_bevel_shadow",
                                                         config->shadowBlendMode(),
                                                         config->shadowOpacity(),
                                                         QBitArray(),
                                                         srcDevice);
 
         const KoColor fillColor(config->shadowColor(), dstDevice->colorSpace());
         const QRect &fillRect = d.shadowHighlightsFinalRect;
 
         KisCachedPaintDevice::Guard d1(dstDevice, *env->cachedPaintDevice());
         KisPaintDeviceSP fillDevice = d1.device();
         fillDevice->setDefaultPixel(fillColor);
 
         KisPainter::copyAreaOptimized(fillRect.topLeft(), fillDevice, dstDevice, fillRect, baseSelection);
     }
 
     selection->clear();
     mapPixelValues(bumpmapSelection, selection,
                    HighlightsFetchOp(), d.shadowHighlightsFinalRect);
     selection->applySelection(limitingSelection, SELECTION_INTERSECT);
 
     //selection->convertToQImage(0, QRect(0,0,300,300)).save("5_highlights_sel.png");
 
     {
         KisPaintDeviceSP dstDevice = dst->getProjection("01_bevel_highlight",
                                                         config->highlightBlendMode(),
                                                         config->highlightOpacity(),
                                                         QBitArray(),
                                                         srcDevice);
 
         const KoColor fillColor(config->highlightColor(), dstDevice->colorSpace());
         const QRect &fillRect = d.shadowHighlightsFinalRect;
 
         KisCachedPaintDevice::Guard d1(dstDevice, *env->cachedPaintDevice());
         KisPaintDeviceSP fillDevice = d1.device();
         fillDevice->setDefaultPixel(fillColor);
 
         KisPainter::copyAreaOptimized(fillRect.topLeft(), fillDevice, dstDevice, fillRect, baseSelection);
     }
 }
 
 void KisLsBevelEmbossFilter::processDirectly(KisPaintDeviceSP src,
                                              KisMultipleProjection *dst,
                                              KisLayerStyleKnockoutBlower *blower,
                                              const QRect &applyRect,
                                              KisPSDLayerStyleSP style,
                                              KisLayerStyleFilterEnvironment *env) const
 {
     Q_UNUSED(env);
     Q_UNUSED(blower);
     KIS_ASSERT_RECOVER_RETURN(style);
 
     const psd_layer_effects_bevel_emboss *config = style->bevelAndEmboss();
     if (!KisLsUtils::checkEffectEnabled(config, dst)) return;
 
     KisLsUtils::LodWrapper<psd_layer_effects_bevel_emboss> w(env->currentLevelOfDetail(), config);
     applyBevelEmboss(src, dst, applyRect, w.config, style->resourcesInterface(), env);
 }
 
 QRect KisLsBevelEmbossFilter::neededRect(const QRect &rect, KisPSDLayerStyleSP style, KisLayerStyleFilterEnvironment *env) const
 {
     const psd_layer_effects_bevel_emboss *config = style->bevelAndEmboss();
     if (!config->effectEnabled()) return rect;
 
     KisLsUtils::LodWrapper<psd_layer_effects_bevel_emboss> w(env->currentLevelOfDetail(), config);
 
     BevelEmbossRectCalculator d(rect, w.config);
     return d.totalNeedRect(rect, w.config);
 }
 
 QRect KisLsBevelEmbossFilter::changedRect(const QRect &rect, KisPSDLayerStyleSP style, KisLayerStyleFilterEnvironment *env) const
 {
     const psd_layer_effects_bevel_emboss *config = style->bevelAndEmboss();
     if (!config->effectEnabled()) return rect;
 
     KisLsUtils::LodWrapper<psd_layer_effects_bevel_emboss> w(env->currentLevelOfDetail(), config);
 
     BevelEmbossRectCalculator d(rect, w.config);
     return d.totalChangeRect(rect, w.config);
 }