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Diffstat (limited to 'src/ui/tools/flood-tool.cpp')
| -rw-r--r-- | src/ui/tools/flood-tool.cpp | 1230 |
1 files changed, 1230 insertions, 0 deletions
diff --git a/src/ui/tools/flood-tool.cpp b/src/ui/tools/flood-tool.cpp new file mode 100644 index 0000000..3e94f35 --- /dev/null +++ b/src/ui/tools/flood-tool.cpp @@ -0,0 +1,1230 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/** + * @file + * Bucket fill drawing context, works by bitmap filling an area on a rendered version + * of the current display and then tracing the result using potrace. + */ +/* Author: + * Lauris Kaplinski <lauris@kaplinski.com> + * bulia byak <buliabyak@users.sf.net> + * John Bintz <jcoswell@coswellproductions.org> + * Jon A. Cruz <jon@joncruz.org> + * Abhishek Sharma + * + * Copyright (C) 2006 Johan Engelen <johan@shouraizou.nl> + * Copyright (C) 2000-2005 authors + * Copyright (C) 2000-2001 Ximian, Inc. + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include "flood-tool.h" + +#include <cmath> +#include <queue> + +#include <gdk/gdkkeysyms.h> +#include <glibmm/i18n.h> + +#include <2geom/pathvector.h> + +#include "async/progress.h" +#include "color.h" +#include "context-fns.h" +#include "desktop-style.h" +#include "desktop.h" +#include "document-undo.h" +#include "document.h" +#include "layer-manager.h" +#include "message-context.h" +#include "message-stack.h" +#include "rubberband.h" +#include "selection.h" +#include "page-manager.h" + +#include "display/cairo-utils.h" +#include "display/drawing-context.h" +#include "display/drawing-image.h" +#include "display/drawing.h" + +#include "include/macros.h" + +#include "livarot/Path.h" +#include "livarot/Shape.h" + +#include "object/sp-namedview.h" +#include "object/sp-path.h" +#include "object/sp-root.h" + +#include "svg/svg.h" + +#include "trace/imagemap.h" +#include "trace/potrace/inkscape-potrace.h" + +#include "ui/icon-names.h" +#include "ui/shape-editor.h" +#include "ui/widget/canvas.h" // Canvas area + +using Inkscape::DocumentUndo; + +using Inkscape::Display::ExtractARGB32; +using Inkscape::Display::ExtractRGB32; +using Inkscape::Display::AssembleARGB32; + +namespace Inkscape { +namespace UI { +namespace Tools { + +// TODO: Replace by C++11 initialization +// Must match PaintBucketChannels enum +Glib::ustring ch_init[8] = { + _("Visible Colors"), + _("Red"), + _("Green"), + _("Blue"), + _("Hue"), + _("Saturation"), + _("Lightness"), + _("Alpha"), +}; +const std::vector<Glib::ustring> FloodTool::channel_list( ch_init, ch_init+8 ); + +Glib::ustring gap_init[4] = { + NC_("Flood autogap", "None"), + NC_("Flood autogap", "Small"), + NC_("Flood autogap", "Medium"), + NC_("Flood autogap", "Large") +}; +const std::vector<Glib::ustring> FloodTool::gap_list( gap_init, gap_init+4 ); + +FloodTool::FloodTool(SPDesktop *desktop) + : ToolBase(desktop, "/tools/paintbucket", "flood.svg") + , item(nullptr) +{ + // TODO: Why does the flood tool use a hardcoded tolerance instead of a pref? + this->tolerance = 4; + + this->shape_editor = new ShapeEditor(desktop); + + SPItem *item = desktop->getSelection()->singleItem(); + if (item) { + this->shape_editor->set_item(item); + } + + this->sel_changed_connection.disconnect(); + this->sel_changed_connection = desktop->getSelection()->connectChanged( + sigc::mem_fun(*this, &FloodTool::selection_changed) + ); + + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + + if (prefs->getBool("/tools/paintbucket/selcue")) { + this->enableSelectionCue(); + } +} + +FloodTool::~FloodTool() { + this->sel_changed_connection.disconnect(); + + delete shape_editor; + shape_editor = nullptr; + + /* fixme: This is necessary because we do not grab */ + if (this->item) { + this->finishItem(); + } +} + +/** + * Callback that processes the "changed" signal on the selection; + * destroys old and creates new knotholder. + */ +void FloodTool::selection_changed(Inkscape::Selection* selection) { + this->shape_editor->unset_item(); + this->shape_editor->set_item(selection->singleItem()); +} + +// Changes from 0.48 -> 0.49 (Cairo) +// 0.49: Ignores alpha in background +// 0.48: RGBA, 0.49 ARGB +// 0.49: premultiplied alpha +inline static guint32 compose_onto(guint32 px, guint32 bg) +{ + guint ap = 0, rp = 0, gp = 0, bp = 0; + guint rb = 0, gb = 0, bb = 0; + ExtractARGB32(px, ap, rp, gp, bp); + ExtractRGB32(bg, rb, gb, bb); + + // guint ao = 255*255 - (255-ap)*(255-bp); ao = (ao + 127) / 255; + // guint ao = (255-ap)*ab + 255*ap; ao = (ao + 127) / 255; + guint ao = 255; // Cairo version doesn't allow background to have alpha != 1. + guint ro = (255-ap)*rb + 255*rp; ro = (ro + 127) / 255; + guint go = (255-ap)*gb + 255*gp; go = (go + 127) / 255; + guint bo = (255-ap)*bb + 255*bp; bo = (bo + 127) / 255; + + guint pxout = AssembleARGB32(ao, ro, go, bo); + return pxout; +} + +/** + * Get the pointer to a pixel in a pixel buffer. + * @param px The pixel buffer. + * @param x The X coordinate. + * @param y The Y coordinate. + * @param stride The rowstride of the pixel buffer. + */ +inline guint32 get_pixel(guchar *px, int x, int y, int stride) { + return *reinterpret_cast<guint32*>(px + y * stride + x * 4); +} + +inline unsigned char * get_trace_pixel(guchar *trace_px, int x, int y, int width) { + return trace_px + (x + y * width); +} + +/** + * \brief Check whether two unsigned integers are close to each other + * + * \param[in] a The 1st unsigned int + * \param[in] b The 2nd unsigned int + * \param[in] d The threshold for comparison + * + * \return true if |a-b| <= d; false otherwise + */ +static bool compare_guint32(guint32 const a, guint32 const b, guint32 const d) +{ + const int difference = std::abs(static_cast<int>(a) - static_cast<int>(b)); + return difference <= d; +} + +/** + * Compare a pixel in a pixel buffer with another pixel to determine if a point should be included in the fill operation. + * @param check The pixel in the pixel buffer to check. + * @param orig The original selected pixel to use as the fill target color. + * @param merged_orig_pixel The original pixel merged with the background. + * @param dtc The desktop background color. + * @param threshold The fill threshold. + * @param method The fill method to use as defined in PaintBucketChannels. + */ +static bool compare_pixels(guint32 check, guint32 orig, guint32 merged_orig_pixel, guint32 dtc, int threshold, PaintBucketChannels method) +{ + float hsl_check[3] = {0,0,0}, hsl_orig[3] = {0,0,0}; + + guint32 ac = 0, rc = 0, gc = 0, bc = 0; + ExtractARGB32(check, ac, rc, gc, bc); + + guint32 ao = 0, ro = 0, go = 0, bo = 0; + ExtractARGB32(orig, ao, ro, go, bo); + + guint32 ad = 0, rd = 0, gd = 0, bd = 0; + ExtractARGB32(dtc, ad, rd, gd, bd); + + guint32 amop = 0, rmop = 0, gmop = 0, bmop = 0; + ExtractARGB32(merged_orig_pixel, amop, rmop, gmop, bmop); + + if ((method == FLOOD_CHANNELS_H) || + (method == FLOOD_CHANNELS_S) || + (method == FLOOD_CHANNELS_L)) { + double dac = ac; + double dao = ao; + SPColor::rgb_to_hsl_floatv(hsl_check, rc / dac, gc / dac, bc / dac); + SPColor::rgb_to_hsl_floatv(hsl_orig, ro / dao, go / dao, bo / dao); + } + + switch (method) { + case FLOOD_CHANNELS_ALPHA: + return compare_guint32(ac, ao, threshold); + case FLOOD_CHANNELS_R: + return compare_guint32(ac ? unpremul_alpha(rc, ac) : 0, + ao ? unpremul_alpha(ro, ao) : 0, + threshold); + case FLOOD_CHANNELS_G: + return compare_guint32(ac ? unpremul_alpha(gc, ac) : 0, + ao ? unpremul_alpha(go, ao) : 0, + threshold); + case FLOOD_CHANNELS_B: + return compare_guint32(ac ? unpremul_alpha(bc, ac) : 0, + ao ? unpremul_alpha(bo, ao) : 0, + threshold); + case FLOOD_CHANNELS_RGB: + { + guint32 amc, rmc, bmc, gmc; + //amc = 255*255 - (255-ac)*(255-ad); amc = (amc + 127) / 255; + //amc = (255-ac)*ad + 255*ac; amc = (amc + 127) / 255; + amc = 255; // Why are we looking at desktop? Cairo version ignores destop alpha + rmc = (255-ac)*rd + 255*rc; rmc = (rmc + 127) / 255; + gmc = (255-ac)*gd + 255*gc; gmc = (gmc + 127) / 255; + bmc = (255-ac)*bd + 255*bc; bmc = (bmc + 127) / 255; + + int diff = 0; // The total difference between each of the 3 color components + diff += std::abs(static_cast<int>(amc ? unpremul_alpha(rmc, amc) : 0) - static_cast<int>(amop ? unpremul_alpha(rmop, amop) : 0)); + diff += std::abs(static_cast<int>(amc ? unpremul_alpha(gmc, amc) : 0) - static_cast<int>(amop ? unpremul_alpha(gmop, amop) : 0)); + diff += std::abs(static_cast<int>(amc ? unpremul_alpha(bmc, amc) : 0) - static_cast<int>(amop ? unpremul_alpha(bmop, amop) : 0)); + return ((diff / 3) <= ((threshold * 3) / 4)); + } + case FLOOD_CHANNELS_H: + return ((int)(fabs(hsl_check[0] - hsl_orig[0]) * 100.0) <= threshold); + case FLOOD_CHANNELS_S: + return ((int)(fabs(hsl_check[1] - hsl_orig[1]) * 100.0) <= threshold); + case FLOOD_CHANNELS_L: + return ((int)(fabs(hsl_check[2] - hsl_orig[2]) * 100.0) <= threshold); + } + + return false; +} + +enum { + PIXEL_CHECKED = 1, + PIXEL_QUEUED = 2, + PIXEL_PAINTABLE = 4, + PIXEL_NOT_PAINTABLE = 8, + PIXEL_COLORED = 16 +}; + +static inline bool is_pixel_checked(unsigned char *t) { return (*t & PIXEL_CHECKED) == PIXEL_CHECKED; } +static inline bool is_pixel_queued(unsigned char *t) { return (*t & PIXEL_QUEUED) == PIXEL_QUEUED; } +static inline bool is_pixel_paintability_checked(unsigned char *t) { + return !((*t & PIXEL_PAINTABLE) == 0) && ((*t & PIXEL_NOT_PAINTABLE) == 0); +} +static inline bool is_pixel_paintable(unsigned char *t) { return (*t & PIXEL_PAINTABLE) == PIXEL_PAINTABLE; } +static inline bool is_pixel_colored(unsigned char *t) { return (*t & PIXEL_COLORED) == PIXEL_COLORED; } + +static inline void mark_pixel_checked(unsigned char *t) { *t |= PIXEL_CHECKED; } +static inline void mark_pixel_queued(unsigned char *t) { *t |= PIXEL_QUEUED; } +static inline void mark_pixel_paintable(unsigned char *t) { *t |= PIXEL_PAINTABLE; *t ^= PIXEL_NOT_PAINTABLE; } +static inline void mark_pixel_not_paintable(unsigned char *t) { *t |= PIXEL_NOT_PAINTABLE; *t ^= PIXEL_PAINTABLE; } +static inline void mark_pixel_colored(unsigned char *t) { *t |= PIXEL_COLORED; } + +static inline void clear_pixel_paintability(unsigned char *t) { *t ^= PIXEL_PAINTABLE; *t ^= PIXEL_NOT_PAINTABLE; } + +struct bitmap_coords_info { + bool is_left; + unsigned int x; + unsigned int y; + int y_limit; + unsigned int width; + unsigned int height; + unsigned int stride; + unsigned int threshold; + unsigned int radius; + PaintBucketChannels method; + guint32 dtc; + guint32 merged_orig_pixel; + Geom::Rect bbox; + Geom::Rect screen; + unsigned int max_queue_size; + unsigned int current_step; +}; + +/** + * Check if a pixel can be included in the fill. + * @param px The rendered pixel buffer to check. + * @param trace_t The pixel in the trace pixel buffer to check or mark. + * @param x The X coordinate. + * @param y The y coordinate. + * @param orig_color The original selected pixel to use as the fill target color. + * @param bci The bitmap_coords_info structure. + */ +inline static bool check_if_pixel_is_paintable(guchar *px, unsigned char *trace_t, int x, int y, guint32 orig_color, bitmap_coords_info bci) { + if (is_pixel_paintability_checked(trace_t)) { + return is_pixel_paintable(trace_t); + } else { + guint32 pixel = get_pixel(px, x, y, bci.stride); + if (compare_pixels(pixel, orig_color, bci.merged_orig_pixel, bci.dtc, bci.threshold, bci.method)) { + mark_pixel_paintable(trace_t); + return true; + } else { + mark_pixel_not_paintable(trace_t); + return false; + } + } +} + +/** + * Perform the bitmap-to-vector tracing and place the traced path onto the document. + * @param px The trace pixel buffer to trace to SVG. + * @param desktop The desktop on which to place the final SVG path. + * @param transform The transform to apply to the final SVG path. + * @param union_with_selection If true, merge the final SVG path with the current selection. + */ +static void do_trace(bitmap_coords_info bci, guchar *trace_px, SPDesktop *desktop, Geom::Affine transform, unsigned int min_x, unsigned int max_x, unsigned int min_y, unsigned int max_y, bool union_with_selection) +{ + SPDocument *document = desktop->getDocument(); + + unsigned char *trace_t; + + auto gray_map = Trace::GrayMap(max_x - min_x + 1, max_y - min_y + 1); + unsigned gray_map_y = 0; + for (unsigned y = min_y; y <= max_y; y++) { + auto gray_map_t = gray_map.row(gray_map_y); + + trace_t = get_trace_pixel(trace_px, min_x, y, bci.width); + for (unsigned x = min_x; x <= max_x; x++) { + *gray_map_t = is_pixel_colored(trace_t) ? Trace::GrayMap::BLACK : Trace::GrayMap::WHITE; + gray_map_t++; + trace_t++; + } + gray_map_y++; + } + + Trace::Potrace::PotraceTracingEngine pte; + auto progress = Async::ProgressAlways<double>(); + auto results = pte.traceGrayMap(gray_map, progress); + + // XML Tree being used here directly while it shouldn't be...." + Inkscape::XML::Document *xml_doc = desktop->doc()->getReprDoc(); + + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + double offset = prefs->getDouble("/tools/paintbucket/offset", 0.0); + + for (auto result : results) { + + Inkscape::XML::Node *pathRepr = xml_doc->createElement("svg:path"); + /* Set style */ + sp_desktop_apply_style_tool (desktop, pathRepr, "/tools/paintbucket", false); + + Path *path = new Path; + path->LoadPathVector(result.path); + + if (offset != 0) { + + Shape *path_shape = new Shape(); + + path->ConvertWithBackData(0.03); + path->Fill(path_shape, 0); + delete path; + + Shape *expanded_path_shape = new Shape(); + + expanded_path_shape->ConvertToShape(path_shape, fill_nonZero); + path_shape->MakeOffset(expanded_path_shape, offset * desktop->current_zoom(), join_round, 4); + expanded_path_shape->ConvertToShape(path_shape, fill_positive); + + Path *expanded_path = new Path(); + + expanded_path->Reset(); + expanded_path_shape->ConvertToForme(expanded_path); + expanded_path->ConvertEvenLines(1.0); + expanded_path->Simplify(1.0); + + delete path_shape; + delete expanded_path_shape; + + gchar *str = expanded_path->svg_dump_path(); + if (str && *str) { + pathRepr->setAttribute("d", str); + g_free(str); + } else { + desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Too much inset</b>, the result is empty.")); + Inkscape::GC::release(pathRepr); + g_free(str); + return; + } + + delete expanded_path; + + } else { + gchar *str = path->svg_dump_path(); + delete path; + pathRepr->setAttribute("d", str); + g_free(str); + } + + auto layer = desktop->layerManager().currentLayer(); + layer->addChild(pathRepr, nullptr); + + SPObject *reprobj = document->getObjectByRepr(pathRepr); + if (reprobj) { + cast<SPItem>(reprobj)->doWriteTransform(transform); + + // premultiply the item transform by the accumulated parent transform in the paste layer + Geom::Affine local (layer->i2doc_affine()); + if (!local.isIdentity()) { + gchar const *t_str = pathRepr->attribute("transform"); + Geom::Affine item_t (Geom::identity()); + if (t_str) + sp_svg_transform_read(t_str, &item_t); + item_t *= local.inverse(); + // (we're dealing with unattached repr, so we write to its attr instead of using sp_item_set_transform) + pathRepr->setAttributeOrRemoveIfEmpty("transform", sp_svg_transform_write(item_t)); + } + + Inkscape::Selection *selection = desktop->getSelection(); + + pathRepr->setPosition(-1); + + if (union_with_selection) { + desktop->messageStack()->flashF( Inkscape::WARNING_MESSAGE, + ngettext("Area filled, path with <b>%d</b> node created and unioned with selection.","Area filled, path with <b>%d</b> nodes created and unioned with selection.", + cast<SPPath>(reprobj)->nodesInPath()), cast<SPPath>(reprobj)->nodesInPath() ); + selection->add(reprobj); + selection->pathUnion(true); + } else { + desktop->messageStack()->flashF( Inkscape::WARNING_MESSAGE, + ngettext("Area filled, path with <b>%d</b> node created.","Area filled, path with <b>%d</b> nodes created.", + cast<SPPath>(reprobj)->nodesInPath()), cast<SPPath>(reprobj)->nodesInPath() ); + selection->set(reprobj); + } + + } + + Inkscape::GC::release(pathRepr); + + } +} + +/** + * The possible return states of perform_bitmap_scanline_check(). + */ +enum ScanlineCheckResult { + SCANLINE_CHECK_OK, + SCANLINE_CHECK_ABORTED, + SCANLINE_CHECK_BOUNDARY +}; + +/** + * Determine if the provided coordinates are within the pixel buffer limits. + * @param x The X coordinate. + * @param y The Y coordinate. + * @param bci The bitmap_coords_info structure. + */ +inline static bool coords_in_range(unsigned int x, unsigned int y, bitmap_coords_info bci) { + return (x < bci.width) && + (y < bci.height); +} + +#define PAINT_DIRECTION_LEFT 1 +#define PAINT_DIRECTION_RIGHT 2 +#define PAINT_DIRECTION_UP 4 +#define PAINT_DIRECTION_DOWN 8 +#define PAINT_DIRECTION_ALL 15 + +/** + * Paint a pixel or a square (if autogap is enabled) on the trace pixel buffer. + * @param px The rendered pixel buffer to check. + * @param trace_px The trace pixel buffer. + * @param orig_color The original selected pixel to use as the fill target color. + * @param bci The bitmap_coords_info structure. + * @param original_point_trace_t The original pixel in the trace pixel buffer to check. + */ +inline static unsigned int paint_pixel(guchar *px, guchar *trace_px, guint32 orig_color, bitmap_coords_info bci, unsigned char *original_point_trace_t) { + if (bci.radius == 0) { + mark_pixel_colored(original_point_trace_t); + return PAINT_DIRECTION_ALL; + } else { + unsigned char *trace_t; + + bool can_paint_up = true; + bool can_paint_down = true; + bool can_paint_left = true; + bool can_paint_right = true; + + for (unsigned int ty = bci.y - bci.radius; ty <= bci.y + bci.radius; ty++) { + for (unsigned int tx = bci.x - bci.radius; tx <= bci.x + bci.radius; tx++) { + if (coords_in_range(tx, ty, bci)) { + trace_t = get_trace_pixel(trace_px, tx, ty, bci.width); + if (!is_pixel_colored(trace_t)) { + if (check_if_pixel_is_paintable(px, trace_t, tx, ty, orig_color, bci)) { + mark_pixel_colored(trace_t); + } else { + if (tx < bci.x) { can_paint_left = false; } + if (tx > bci.x) { can_paint_right = false; } + if (ty < bci.y) { can_paint_up = false; } + if (ty > bci.y) { can_paint_down = false; } + } + } + } + } + } + + unsigned int paint_directions = 0; + if (can_paint_left) { paint_directions += PAINT_DIRECTION_LEFT; } + if (can_paint_right) { paint_directions += PAINT_DIRECTION_RIGHT; } + if (can_paint_up) { paint_directions += PAINT_DIRECTION_UP; } + if (can_paint_down) { paint_directions += PAINT_DIRECTION_DOWN; } + + return paint_directions; + } +} + +/** + * Push a point to be checked onto the bottom of the rendered pixel buffer check queue. + * @param fill_queue The fill queue to add the point to. + * @param max_queue_size The maximum size of the fill queue. + * @param trace_t The trace pixel buffer pixel. + * @param x The X coordinate. + * @param y The Y coordinate. + */ +static void push_point_onto_queue(std::deque<Geom::Point> *fill_queue, unsigned int max_queue_size, unsigned char *trace_t, unsigned int x, unsigned int y) { + if (!is_pixel_queued(trace_t)) { + if ((fill_queue->size() < max_queue_size)) { + fill_queue->push_back(Geom::Point(x, y)); + mark_pixel_queued(trace_t); + } + } +} + +/** + * Shift a point to be checked onto the top of the rendered pixel buffer check queue. + * @param fill_queue The fill queue to add the point to. + * @param max_queue_size The maximum size of the fill queue. + * @param trace_t The trace pixel buffer pixel. + * @param x The X coordinate. + * @param y The Y coordinate. + */ +static void shift_point_onto_queue(std::deque<Geom::Point> *fill_queue, unsigned int max_queue_size, unsigned char *trace_t, unsigned int x, unsigned int y) { + if (!is_pixel_queued(trace_t)) { + if ((fill_queue->size() < max_queue_size)) { + fill_queue->push_front(Geom::Point(x, y)); + mark_pixel_queued(trace_t); + } + } +} + +/** + * Scan a row in the rendered pixel buffer and add points to the fill queue as necessary. + * @param fill_queue The fill queue to add the point to. + * @param px The rendered pixel buffer. + * @param trace_px The trace pixel buffer. + * @param orig_color The original selected pixel to use as the fill target color. + * @param bci The bitmap_coords_info structure. + */ +static ScanlineCheckResult perform_bitmap_scanline_check(std::deque<Geom::Point> *fill_queue, guchar *px, guchar *trace_px, guint32 orig_color, bitmap_coords_info bci, unsigned int *min_x, unsigned int *max_x) { + bool aborted = false; + bool reached_screen_boundary = false; + bool ok; + + bool keep_tracing; + bool initial_paint = true; + + unsigned char *current_trace_t = get_trace_pixel(trace_px, bci.x, bci.y, bci.width); + unsigned int paint_directions; + + bool currently_painting_top = false; + bool currently_painting_bottom = false; + + unsigned int top_ty = (bci.y > 0) ? bci.y - 1 : 0; + unsigned int bottom_ty = bci.y + 1; + + bool can_paint_top = (top_ty > 0); + bool can_paint_bottom = (bottom_ty < bci.height); + + Geom::Point front_of_queue = fill_queue->empty() ? Geom::Point() : fill_queue->front(); + + do { + ok = false; + if (bci.is_left) { + keep_tracing = (bci.x != 0); + } else { + keep_tracing = (bci.x < bci.width); + } + + *min_x = MIN(*min_x, bci.x); + *max_x = MAX(*max_x, bci.x); + + if (keep_tracing) { + if (check_if_pixel_is_paintable(px, current_trace_t, bci.x, bci.y, orig_color, bci)) { + paint_directions = paint_pixel(px, trace_px, orig_color, bci, current_trace_t); + if (bci.radius == 0) { + mark_pixel_checked(current_trace_t); + if ((!fill_queue->empty()) && + (front_of_queue[Geom::X] == bci.x) && + (front_of_queue[Geom::Y] == bci.y)) { + fill_queue->pop_front(); + front_of_queue = fill_queue->empty() ? Geom::Point() : fill_queue->front(); + } + } + + if (can_paint_top) { + if (paint_directions & PAINT_DIRECTION_UP) { + unsigned char *trace_t = current_trace_t - bci.width; + if (!is_pixel_queued(trace_t)) { + bool ok_to_paint = check_if_pixel_is_paintable(px, trace_t, bci.x, top_ty, orig_color, bci); + + if (initial_paint) { currently_painting_top = !ok_to_paint; } + + if (ok_to_paint && (!currently_painting_top)) { + currently_painting_top = true; + push_point_onto_queue(fill_queue, bci.max_queue_size, trace_t, bci.x, top_ty); + } + if ((!ok_to_paint) && currently_painting_top) { + currently_painting_top = false; + } + } + } + } + + if (can_paint_bottom) { + if (paint_directions & PAINT_DIRECTION_DOWN) { + unsigned char *trace_t = current_trace_t + bci.width; + if (!is_pixel_queued(trace_t)) { + bool ok_to_paint = check_if_pixel_is_paintable(px, trace_t, bci.x, bottom_ty, orig_color, bci); + + if (initial_paint) { currently_painting_bottom = !ok_to_paint; } + + if (ok_to_paint && (!currently_painting_bottom)) { + currently_painting_bottom = true; + push_point_onto_queue(fill_queue, bci.max_queue_size, trace_t, bci.x, bottom_ty); + } + if ((!ok_to_paint) && currently_painting_bottom) { + currently_painting_bottom = false; + } + } + } + } + + if (bci.is_left) { + if (paint_directions & PAINT_DIRECTION_LEFT) { + bci.x--; current_trace_t--; + ok = true; + } + } else { + if (paint_directions & PAINT_DIRECTION_RIGHT) { + bci.x++; current_trace_t++; + ok = true; + } + } + + initial_paint = false; + } + } else { + if (bci.bbox.min()[Geom::X] > bci.screen.min()[Geom::X]) { + aborted = true; break; + } else { + reached_screen_boundary = true; + } + } + } while (ok); + + if (aborted) { return SCANLINE_CHECK_ABORTED; } + if (reached_screen_boundary) { return SCANLINE_CHECK_BOUNDARY; } + return SCANLINE_CHECK_OK; +} + +/** + * Sort the rendered pixel buffer check queue vertically. + */ +static bool sort_fill_queue_vertical(Geom::Point a, Geom::Point b) { + return a[Geom::Y] > b[Geom::Y]; +} + +/** + * Sort the rendered pixel buffer check queue horizontally. + */ +static bool sort_fill_queue_horizontal(Geom::Point a, Geom::Point b) { + return a[Geom::X] > b[Geom::X]; +} + +/** + * Perform a flood fill operation. + * @param desktop The desktop of this tool's event context. + * @param event The details of this event. + * @param union_with_selection If true, union the new fill with the current selection. + * @param is_point_fill If false, use the Rubberband "touch selection" to get the initial points for the fill. + * @param is_touch_fill If true, use only the initial contact point in the Rubberband "touch selection" as the fill target color. + */ +static void sp_flood_do_flood_fill(SPDesktop *desktop, GdkEvent *event, + bool union_with_selection, bool is_point_fill, bool is_touch_fill) { + + SPDocument *document = desktop->getDocument(); + + document->ensureUpToDate(); + + Geom::OptRect bbox = document->getRoot()->visualBounds(); + + if (!bbox) { + desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill.")); + return; + } + + // Render 160% of the physical display to the render pixel buffer, so that available + // fill areas off the screen can be included in the fill. + double padding = 1.6; + + // image space is world space with an offset + Geom::Rect const screen_world = desktop->getCanvas()->get_area_world(); + Geom::Rect const screen = screen_world * desktop->w2d(); + Geom::IntPoint const img_dims = (screen_world.dimensions() * padding).ceil(); + Geom::Affine const world2img = Geom::Translate((img_dims - screen_world.dimensions()) / 2.0 - screen_world.min()); + Geom::Affine const doc2img = desktop->doc2dt() * desktop->d2w() * world2img; + + auto const width = img_dims.x(); + auto const height = img_dims.y(); + + int stride = cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, width); + guchar *px = g_new(guchar, stride * height); + guint32 bgcolor, dtc; + + // Draw image into data block px + { // this block limits the lifetime of Drawing and DrawingContext + /* Create DrawingItems and set transform */ + unsigned dkey = SPItem::display_key_new(1); + Inkscape::Drawing drawing; + Inkscape::DrawingItem *root = document->getRoot()->invoke_show( drawing, dkey, SP_ITEM_SHOW_DISPLAY); + root->setTransform(doc2img); + drawing.setRoot(root); + + Geom::IntRect final_bbox = Geom::IntRect::from_xywh(0, 0, width, height); + drawing.update(final_bbox); + + cairo_surface_t *s = cairo_image_surface_create_for_data( + px, CAIRO_FORMAT_ARGB32, width, height, stride); + Inkscape::DrawingContext dc(s, Geom::Point(0,0)); + // cairo_translate not necessary here - surface origin is at 0,0 + + bgcolor = document->getPageManager().background_color; + bgcolor &= 0xffffff00; // make color transparent for 'alpha' flood mode to work + // bgcolor is 0xrrggbbaa, we need 0xaarrggbb + dtc = bgcolor >> 8; // keep color transparent; page color doesn't support transparency anymore + + dc.setSource(bgcolor); + dc.setOperator(CAIRO_OPERATOR_SOURCE); + dc.paint(); + dc.setOperator(CAIRO_OPERATOR_OVER); + + drawing.render(dc, final_bbox); + + //cairo_surface_write_to_png( s, "cairo.png" ); + + cairo_surface_flush(s); + cairo_surface_destroy(s); + + // Hide items + document->getRoot()->invoke_hide(dkey); + } + + // { + // // Dump data to png + // cairo_surface_t *s = cairo_image_surface_create_for_data( + // px, CAIRO_FORMAT_ARGB32, width, height, stride); + // cairo_surface_write_to_png( s, "cairo2.png" ); + // std::cout << " Wrote cairo2.png" << std::endl; + // } + + guchar *trace_px = g_new(guchar, width * height); + memset(trace_px, 0x00, width * height); + + std::deque<Geom::Point> fill_queue; + std::queue<Geom::Point> color_queue; + + std::vector<Geom::Point> fill_points; + + bool aborted = false; + int y_limit = height - 1; + + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + PaintBucketChannels method = (PaintBucketChannels) prefs->getInt("/tools/paintbucket/channels", 0); + int threshold = prefs->getIntLimited("/tools/paintbucket/threshold", 1, 0, 100); + + switch(method) { + case FLOOD_CHANNELS_ALPHA: + case FLOOD_CHANNELS_RGB: + case FLOOD_CHANNELS_R: + case FLOOD_CHANNELS_G: + case FLOOD_CHANNELS_B: + threshold = (255 * threshold) / 100; + break; + case FLOOD_CHANNELS_H: + case FLOOD_CHANNELS_S: + case FLOOD_CHANNELS_L: + break; + } + + bitmap_coords_info bci; + + bci.y_limit = y_limit; + bci.width = width; + bci.height = height; + bci.stride = stride; + bci.threshold = threshold; + bci.method = method; + bci.bbox = *bbox; + bci.screen = screen; + bci.dtc = dtc; + bci.radius = prefs->getIntLimited("/tools/paintbucket/autogap", 0, 0, 3); + bci.max_queue_size = (width * height) / 4; + bci.current_step = 0; + + if (is_point_fill) { + fill_points.emplace_back(event->button.x, event->button.y); + } else { + Inkscape::Rubberband *r = Inkscape::Rubberband::get(desktop); + fill_points = r->getPoints(); + } + + auto const img_max_indices = Geom::Rect::from_xywh(0, 0, width - 1, height - 1); + + for (unsigned int i = 0; i < fill_points.size(); i++) { + Geom::Point pw = fill_points[i] * world2img; + + pw = img_max_indices.clamp(pw); + + if (is_touch_fill) { + if (i == 0) { + color_queue.push(pw); + } else { + unsigned char *trace_t = get_trace_pixel(trace_px, (int)pw[Geom::X], (int)pw[Geom::Y], width); + push_point_onto_queue(&fill_queue, bci.max_queue_size, trace_t, (int)pw[Geom::X], (int)pw[Geom::Y]); + } + } else { + color_queue.push(pw); + } + } + + bool reached_screen_boundary = false; + + bool first_run = true; + + unsigned long sort_size_threshold = 5; + + unsigned int min_y = height; + unsigned int max_y = 0; + unsigned int min_x = width; + unsigned int max_x = 0; + + while (!color_queue.empty() && !aborted) { + Geom::Point color_point = color_queue.front(); + color_queue.pop(); + + int cx = (int)color_point[Geom::X]; + int cy = (int)color_point[Geom::Y]; + + guint32 orig_color = get_pixel(px, cx, cy, stride); + bci.merged_orig_pixel = compose_onto(orig_color, dtc); + + unsigned char *trace_t = get_trace_pixel(trace_px, cx, cy, width); + if (!is_pixel_checked(trace_t) && !is_pixel_colored(trace_t)) { + if (check_if_pixel_is_paintable(px, trace_px, cx, cy, orig_color, bci)) { + shift_point_onto_queue(&fill_queue, bci.max_queue_size, trace_t, cx, cy); + + if (!first_run) { + for (unsigned int y = 0; y < height; y++) { + trace_t = get_trace_pixel(trace_px, 0, y, width); + for (unsigned int x = 0; x < width; x++) { + clear_pixel_paintability(trace_t); + trace_t++; + } + } + } + first_run = false; + } + } + + unsigned long old_fill_queue_size = fill_queue.size(); + + while (!fill_queue.empty() && !aborted) { + Geom::Point cp = fill_queue.front(); + + if (bci.radius == 0) { + unsigned long new_fill_queue_size = fill_queue.size(); + + /* + * To reduce the number of points in the fill queue, periodically + * resort all of the points in the queue so that scanline checks + * can complete more quickly. A point cannot be checked twice + * in a normal scanline checks, so forcing scanline checks to start + * from one corner of the rendered area as often as possible + * will reduce the number of points that need to be checked and queued. + */ + if (new_fill_queue_size > sort_size_threshold) { + if (new_fill_queue_size > old_fill_queue_size) { + std::sort(fill_queue.begin(), fill_queue.end(), sort_fill_queue_vertical); + + std::deque<Geom::Point>::iterator start_sort = fill_queue.begin(); + std::deque<Geom::Point>::iterator end_sort = fill_queue.begin(); + unsigned int sort_y = (unsigned int)cp[Geom::Y]; + unsigned int current_y; + + for (std::deque<Geom::Point>::iterator i = fill_queue.begin(); i != fill_queue.end(); ++i) { + Geom::Point current = *i; + current_y = (unsigned int)current[Geom::Y]; + if (current_y != sort_y) { + if (start_sort != end_sort) { + std::sort(start_sort, end_sort, sort_fill_queue_horizontal); + } + sort_y = current_y; + start_sort = i; + } + end_sort = i; + } + if (start_sort != end_sort) { + std::sort(start_sort, end_sort, sort_fill_queue_horizontal); + } + + cp = fill_queue.front(); + } + } + + old_fill_queue_size = new_fill_queue_size; + } + + fill_queue.pop_front(); + + int x = (int)cp[Geom::X]; + int y = (int)cp[Geom::Y]; + + min_y = MIN((unsigned int)y, min_y); + max_y = MAX((unsigned int)y, max_y); + + unsigned char *trace_t = get_trace_pixel(trace_px, x, y, width); + if (!is_pixel_checked(trace_t)) { + mark_pixel_checked(trace_t); + + if (y == 0) { + if (bbox->min()[Geom::Y] > screen.min()[Geom::Y]) { + aborted = true; break; + } else { + reached_screen_boundary = true; + } + } + + if (y == y_limit) { + if (bbox->max()[Geom::Y] < screen.max()[Geom::Y]) { + aborted = true; break; + } else { + reached_screen_boundary = true; + } + } + + bci.is_left = true; + bci.x = x; + bci.y = y; + + ScanlineCheckResult result = perform_bitmap_scanline_check(&fill_queue, px, trace_px, orig_color, bci, &min_x, &max_x); + + switch (result) { + case SCANLINE_CHECK_ABORTED: + aborted = true; + break; + case SCANLINE_CHECK_BOUNDARY: + reached_screen_boundary = true; + break; + default: + break; + } + + if (bci.x < width) { + trace_t++; + if (!is_pixel_checked(trace_t) && !is_pixel_queued(trace_t)) { + mark_pixel_checked(trace_t); + bci.is_left = false; + bci.x = x + 1; + + result = perform_bitmap_scanline_check(&fill_queue, px, trace_px, orig_color, bci, &min_x, &max_x); + + switch (result) { + case SCANLINE_CHECK_ABORTED: + aborted = true; + break; + case SCANLINE_CHECK_BOUNDARY: + reached_screen_boundary = true; + break; + default: + break; + } + } + } + } + + bci.current_step++; + + if (bci.current_step > bci.max_queue_size) { + aborted = true; + } + } + } + + g_free(px); + + if (aborted) { + g_free(trace_px); + desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill.")); + return; + } + + if (reached_screen_boundary) { + desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Only the visible part of the bounded area was filled.</b> If you want to fill all of the area, undo, zoom out, and fill again.")); + } + + unsigned int trace_padding = bci.radius + 1; + if (min_y > trace_padding) { min_y -= trace_padding; } + if (max_y < (y_limit - trace_padding)) { max_y += trace_padding; } + if (min_x > trace_padding) { min_x -= trace_padding; } + if (max_x < (width - 1 - trace_padding)) { max_x += trace_padding; } + + Geom::Affine inverted_affine = Geom::Translate(min_x, min_y) * doc2img.inverse(); + + do_trace(bci, trace_px, desktop, inverted_affine, min_x, max_x, min_y, max_y, union_with_selection); + + g_free(trace_px); + + DocumentUndo::done(document, _("Fill bounded area"), INKSCAPE_ICON("color-fill")); +} + +bool FloodTool::item_handler(SPItem* item, GdkEvent* event) { + gint ret = FALSE; + + switch (event->type) { + case GDK_BUTTON_PRESS: + if ((event->button.state & GDK_CONTROL_MASK) && event->button.button == 1) { + Geom::Point const button_w(event->button.x, event->button.y); + + SPItem *item = sp_event_context_find_item(_desktop, button_w, TRUE, TRUE); + + // Set style + _desktop->applyCurrentOrToolStyle(item, "/tools/paintbucket", false); + + DocumentUndo::done(_desktop->getDocument(), _("Set style on object"), INKSCAPE_ICON("color-fill")); + // Dead assignment: Value stored to 'ret' is never read + //ret = TRUE; + } + break; + + default: + break; + } + +// if (((ToolBaseClass *) sp_flood_context_parent_class)->item_handler) { +// ret = ((ToolBaseClass *) sp_flood_context_parent_class)->item_handler(event_context, item, event); +// } + // CPPIFY: ret is overwritten... + ret = ToolBase::item_handler(item, event); + + return ret; +} + +bool FloodTool::root_handler(GdkEvent* event) { + static bool dragging; + + gint ret = FALSE; + + switch (event->type) { + case GDK_BUTTON_PRESS: + if (event->button.button == 1) { + if (!(event->button.state & GDK_CONTROL_MASK)) { + Geom::Point const button_w(event->button.x, event->button.y); + + if (Inkscape::have_viable_layer(_desktop, this->defaultMessageContext())) { + // save drag origin + this->xp = (gint) button_w[Geom::X]; + this->yp = (gint) button_w[Geom::Y]; + this->within_tolerance = true; + + dragging = true; + + Geom::Point const p(_desktop->w2d(button_w)); + Inkscape::Rubberband::get(_desktop)->setMode(RUBBERBAND_MODE_TOUCHPATH); + Inkscape::Rubberband::get(_desktop)->start(_desktop, p); + } + } + } + + case GDK_MOTION_NOTIFY: + if ( dragging && ( event->motion.state & GDK_BUTTON1_MASK )) { + if ( this->within_tolerance + && ( abs( (gint) event->motion.x - this->xp ) < this->tolerance ) + && ( abs( (gint) event->motion.y - this->yp ) < this->tolerance ) ) { + break; // do not drag if we're within tolerance from origin + } + + this->within_tolerance = false; + + Geom::Point const motion_pt(event->motion.x, event->motion.y); + Geom::Point const p(_desktop->w2d(motion_pt)); + + if (Inkscape::Rubberband::get(_desktop)->is_started()) { + Inkscape::Rubberband::get(_desktop)->move(p); + this->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, _("<b>Draw over</b> areas to add to fill, hold <b>Alt</b> for touch fill")); + gobble_motion_events(GDK_BUTTON1_MASK); + } + } + break; + + case GDK_BUTTON_RELEASE: + if (event->button.button == 1) { + Inkscape::Rubberband *r = Inkscape::Rubberband::get(_desktop); + + if (r->is_started()) { + dragging = false; + bool is_point_fill = this->within_tolerance; + bool is_touch_fill = event->button.state & GDK_MOD1_MASK; + + // It's possible for the user to sneakily change the tool while the + // Gtk main loop has control, so we save the current desktop address: + SPDesktop* current_desktop = _desktop; + + current_desktop->setWaitingCursor(); + sp_flood_do_flood_fill(current_desktop, event, + event->button.state & GDK_SHIFT_MASK, + is_point_fill, is_touch_fill); + current_desktop->clearWaitingCursor(); + r->stop(); + + // We check whether our object was deleted by SPDesktop::setEventContext() + // TODO: fix SPDesktop so that it doesn't kill us before we're done + ToolBase *current_context = current_desktop->getEventContext(); + + if (current_context == (ToolBase*)this) { // We're still alive + this->defaultMessageContext()->clear(); + } // else just return without dereferencing `this`. + ret = true; + } + } + break; + case GDK_KEY_PRESS: + switch (get_latin_keyval (&event->key)) { + case GDK_KEY_Up: + case GDK_KEY_Down: + case GDK_KEY_KP_Up: + case GDK_KEY_KP_Down: + // prevent the zoom field from activation + if (!MOD__CTRL_ONLY(event)) + ret = TRUE; + break; + default: + break; + } + break; + + default: + break; + } + + if (!ret) { + ret = ToolBase::root_handler(event); + } + + return ret; +} + +void FloodTool::finishItem() { + this->message_context->clear(); + + if (this->item != nullptr) { + this->item->updateRepr(); + + _desktop->getSelection()->set(this->item); + DocumentUndo::done(_desktop->getDocument(), _("Fill bounded area"), INKSCAPE_ICON("color-fill")); + + this->item = nullptr; + } +} + +void FloodTool::set_channels(gint channels) { + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + prefs->setInt("/tools/paintbucket/channels", channels); +} + +} +} +} + +/* + Local Variables: + mode:c++ + c-file-style:"stroustrup" + c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) + indent-tabs-mode:nil + fill-column:99 + End: +*/ +// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 : |