1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#pragma once
#include <drawinglayer/drawinglayerdllapi.h>
#include <drawinglayer/primitive2d/Primitive2DContainer.hxx>
#include <drawinglayer/primitive2d/Primitive2DVisitor.hxx>
#include <drawinglayer/geometry/viewinformation2d.hxx>
#include <com/sun/star/util/XAccounting.hpp>
#include <basegfx/range/b2drange.hxx>
#include <com/sun/star/graphic/XPrimitive2D.hpp>
#include <comphelper/compbase.hxx>
#include <salhelper/simplereferenceobject.hxx>
#include <rtl/ref.hxx>
#include <deque>
#include <utility>
namespace drawinglayer::geometry
{
class ViewInformation2D;
}
typedef comphelper::WeakComponentImplHelper<css::graphic::XPrimitive2D, css::util::XAccounting>
BasePrimitive2DImplBase;
namespace drawinglayer::primitive2d
{
/** BasePrimitive2D class
Baseclass for all C++ implementations of css::graphic::XPrimitive2D
This class is strongly virtual due to the lack of getPrimitiveID() implementation.
This is by purpose, this base class shall not be incarnated and be used directly as
a XPrimitive2D.
It is noncopyable to make clear that a primitive is a read-only
instance and copying or changing values is not intended. The idea is to hold all data
needed for visualisation of this primitive in unchangeable form.
It is derived from cppu::BaseMutex to have a Mutex at hand; in a base
implementation this may not be needed, but e.g. when buffering at last decomposition
in a local member, multiple threads may try to decompose at the same time, so locking
is needed to avoid race conditions seen from the UNO object implementation.
A method to get a simplified representation is provided by get2DDecomposition. The
default implementation returns an empty sequence. The idea is that processors
using this primitive and do not know it, may get the decomposition and process
these instead. An example is e.g. a fat line, who's decomposition may contain
the geometric representation of that line using filled polygon primitives. When
the renderer knows how to handle fat lines, he may process this primitive directly;
if not he can use the decomposition. With this functionality, renderers may operate by
knowing only a small set of primitives.
When a primitive does not implement get2DDecomposition, it is called a 'Basic Primitive' and
belongs to the set of primitives which a processor should be able to handle. Practice
will define this minimal sets of primitives. When defined and the concept is proved,
unique UNO APIs may be defined/implemented for these set to allow more intense work
with primitives using UNO.
Current Basic 2D Primitives are:
- BitmapPrimitive2D (bitmap data, evtl. with transparence)
- PointArrayPrimitive2D (single points)
- PolygonHairlinePrimitive2D (hairline curves/polygons)
- PolyPolygonColorPrimitive2D (colored polygons)
UPDATE: MetafilePrimitive2D (VCL Metafile) is taken off this list since
it is implemented with the integration of CWS aw078 into DV300m69.
All other implemented primitives have a defined decomposition and can thus be
decomposed down to this small set.
A renderer implementing support for this minimal set of primitives can completely
render primitive-based visualisations. Of course, he also has to take states into account
which are represented by GroupPrimitive2D derivations, see groupprimitive2d.hxx
To support getting the geometric BoundRect, getB2DRange is used. The default
implementation will use the get2DDecomposition result and merge a range from the
entries. Thus, an implementation is only necessary for the Basic Primitives, but
of course speedups are possible (and are used) by implementing the method at higher-level
primitives.
For primitive identification, getPrimitiveID is used currently in this implementations
to allow a fast switch/case processing. This needs a unique identifier mechanism which
currently uses defines (see drawinglayer_primitivetypes2d.hxx). For UNO primitive API
it will be needed to add a unique descriptor (Name?) later to the API.
This base implementation provides mappings from the methods from XPrimitive2D
(getDecomposition/getRange) to the appropriate methods in the C++ implementations
(get2DDecomposition/getB2DRange). The PropertyValue ViewParameters is converted to
the appropriate C++ implementation class ViewInformation2D.
This base class does not implement any buffering; e.g. buffering the decomposition
and/or the range. These may be buffered anytime since the definition is that the primitive
is read-only and thus unchangeable. This implies that the decomposition and/or getting
the range will lead to the same result as last time, under the precondition that
the parameter ViewInformation2D is the same as the last one. This is usually the case
for view-independent primitives which are defined by not using ViewInformation2D
in their get2DDecomposition/getB2DRange implementations.
*/
class DRAWINGLAYERCORE_DLLPUBLIC BasePrimitive2D : public salhelper::SimpleReferenceObject
{
BasePrimitive2D(const BasePrimitive2D&) = delete;
BasePrimitive2D& operator=(const BasePrimitive2D&) = delete;
public:
// constructor/destructor
BasePrimitive2D();
virtual ~BasePrimitive2D() override;
/** the ==operator is mainly needed to allow testing newly-created primitives against their last
incarnation which buffers/holds the made decompositions. The default implementation
uses getPrimitive2DID()-calls to test if it's the same ID at last.
Overridden implementations are then based on this implementation
*/
virtual bool operator==(const BasePrimitive2D& rPrimitive) const;
bool operator!=(const BasePrimitive2D& rPrimitive) const { return !operator==(rPrimitive); }
/// The default implementation will use getDecomposition results to create the range
virtual basegfx::B2DRange
getB2DRange(const geometry::ViewInformation2D& rViewInformation) const;
/** provide unique ID for fast identifying of known primitive implementations in renderers. These use
the defines from drawinglayer_primitivetypes2d.hxx to define unique IDs.
*/
virtual sal_uInt32 getPrimitive2DID() const = 0;
/// The default implementation will return an empty sequence
virtual void get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor,
const geometry::ViewInformation2D& rViewInformation) const;
// Methods from XPrimitive2D
/** The getDecomposition implementation for UNO API will use getDecomposition from this implementation. It
will construct a ViewInformation2D from the ViewParameters for that purpose
*/
Primitive2DContainer
getDecomposition(const css::uno::Sequence<css::beans::PropertyValue>& rViewParameters);
/** The getRange implementation for UNO API will use getRange from this implementation. It
will construct a ViewInformation2D from the ViewParameters for that purpose
*/
css::geometry::RealRectangle2D
getRange(const css::uno::Sequence<css::beans::PropertyValue>& rViewParameters);
// XAccounting
virtual sal_Int64 estimateUsage();
};
/**
Rather than make all the BasePrimitive2D classes bear the cost of being an UNO
object, we just wrap the top level BasePrimitive2D in this class when we need
to pass them over UNO
*/
class DRAWINGLAYERCORE_DLLPUBLIC UnoPrimitive2D final : public BasePrimitive2DImplBase
{
UnoPrimitive2D(const UnoPrimitive2D&) = delete;
UnoPrimitive2D& operator=(const UnoPrimitive2D&) = delete;
public:
// constructor/destructor
UnoPrimitive2D(rtl::Reference<BasePrimitive2D> xPrimitive)
: mxPrimitive(std::move(xPrimitive))
{
}
virtual ~UnoPrimitive2D() override;
// Methods from XPrimitive2D
/** The getDecomposition implementation for UNO API will use getDecomposition from this implementation. It
will construct a ViewInformation2D from the ViewParameters for that purpose
*/
virtual css::uno::Sequence<::css::uno::Reference<::css::graphic::XPrimitive2D>> SAL_CALL
getDecomposition(const css::uno::Sequence<css::beans::PropertyValue>& rViewParameters) override;
/** The getRange implementation for UNO API will use getRange from this implementation. It
will construct a ViewInformation2D from the ViewParameters for that purpose
*/
virtual css::geometry::RealRectangle2D SAL_CALL
getRange(const css::uno::Sequence<css::beans::PropertyValue>& rViewParameters) override;
// XAccounting
virtual sal_Int64 SAL_CALL estimateUsage() override;
rtl::Reference<BasePrimitive2D> const& getBasePrimitive2D() const { return mxPrimitive; }
private:
rtl::Reference<BasePrimitive2D> mxPrimitive;
};
} // end of namespace drawinglayer::primitive2d
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
