mirror of http://192.168.1.51:8099/lmh188/twain3.0
132 lines
5.0 KiB
C++
132 lines
5.0 KiB
C++
/**********************************************************************
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* File: stepblob.h (Formerly cblob.h)
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* Description: Code for C_BLOB class.
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* Author: Ray Smith
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* Created: Tue Oct 08 10:41:13 BST 1991
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*
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* (C) Copyright 1991, Hewlett-Packard Ltd.
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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** http://www.apache.org/licenses/LICENSE-2.0
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*
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**********************************************************************/
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#ifndef STEPBLOB_H
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#define STEPBLOB_H
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#include "coutln.h"
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#include "rect.h"
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class C_BLOB;
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struct Pix;
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ELISTIZEH(C_BLOB)
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class C_BLOB:public ELIST_LINK
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{
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public:
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C_BLOB() {
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}
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explicit C_BLOB(C_OUTLINE_LIST *outline_list);
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// Simpler constructor to build a blob from a single outline that has
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// already been fully initialized.
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explicit C_BLOB(C_OUTLINE* outline);
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// Builds a set of one or more blobs from a list of outlines.
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// Input: one outline on outline_list contains all the others, but the
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// nesting and order are undefined.
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// If good_blob is true, the blob is added to good_blobs_it, unless
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// an illegal (generation-skipping) parent-child relationship is found.
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// If so, the parent blob goes to bad_blobs_it, and the immediate children
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// are promoted to the top level, recursively being sent to good_blobs_it.
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// If good_blob is false, all created blobs will go to the bad_blobs_it.
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// Output: outline_list is empty. One or more blobs are added to
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// good_blobs_it and/or bad_blobs_it.
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static void ConstructBlobsFromOutlines(bool good_blob,
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C_OUTLINE_LIST* outline_list,
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C_BLOB_IT* good_blobs_it,
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C_BLOB_IT* bad_blobs_it);
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// Sets the COUT_INVERSE flag appropriately on the outlines and their
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// children recursively, reversing the outlines if needed so that
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// everything has an anticlockwise top-level.
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void CheckInverseFlagAndDirection();
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// Build and return a fake blob containing a single fake outline with no
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// steps.
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static C_BLOB* FakeBlob(const TBOX& box);
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C_OUTLINE_LIST *out_list() { //get outline list
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return &outlines;
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}
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TBOX bounding_box() const; // compute bounding box
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inT32 area(); //compute area
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inT32 perimeter(); // Total perimeter of outlines and 1st level children.
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inT32 outer_area(); //compute area
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inT32 count_transitions( //count maxima
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inT32 threshold); //size threshold
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void move(const ICOORD vec); // repostion blob by vector
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void rotate(const FCOORD& rotation); // Rotate by given vector.
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// Adds sub-pixel resolution EdgeOffsets for the outlines using greyscale
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// if the supplied pix is 8-bit or the binary edges if NULL.
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void ComputeEdgeOffsets(int threshold, Pix* pix);
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// Estimates and returns the baseline position based on the shape of the
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// outlines.
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inT16 EstimateBaselinePosition();
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// Returns a Pix rendering of the blob. pixDestroy after use.
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Pix* render();
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// Returns a Pix rendering of the outline of the blob. (no fill).
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// pixDestroy after use.
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Pix* render_outline();
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#ifndef GRAPHICS_DISABLED
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void plot( //draw one
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ScrollView* window, //window to draw in
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ScrollView::Color blob_colour, //for outer bits
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ScrollView::Color child_colour); //for holes
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// Draws the blob in the given colour, and child_colour, normalized
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// using the given denorm, making use of sub-pixel accurate information
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// if available.
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void plot_normed(const DENORM& denorm,
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ScrollView::Color blob_colour,
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ScrollView::Color child_colour,
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ScrollView* window);
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#endif // GRAPHICS_DISABLED
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C_BLOB& operator= (const C_BLOB & source) {
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if (!outlines.empty ())
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outlines.clear();
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outlines.deep_copy(&source.outlines, &C_OUTLINE::deep_copy);
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return *this;
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}
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static C_BLOB* deep_copy(const C_BLOB* src) {
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C_BLOB* blob = new C_BLOB;
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*blob = *src;
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return blob;
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}
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static int SortByXMiddle(const void *v1, const void *v2) {
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const C_BLOB* blob1 = *reinterpret_cast<const C_BLOB* const *>(v1);
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const C_BLOB* blob2 = *reinterpret_cast<const C_BLOB* const *>(v2);
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return blob1->bounding_box().x_middle() -
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blob2->bounding_box().x_middle();
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}
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private:
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C_OUTLINE_LIST outlines; //master elements
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};
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#endif
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