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
|
/* -*- 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 .
*/
#include <sal/config.h>
#include <sal/log.hxx>
#include <basegfx/polygon/b2dpolypolygon.hxx>
#include <basegfx/polygon/b2dpolygontriangulator.hxx>
#include <basegfx/polygon/b2dpolypolygontools.hxx>
#include <utility>
#include "surfaceproxy.hxx"
namespace canvas
{
SurfaceProxy::SurfaceProxy( std::shared_ptr<canvas::IColorBuffer> xBuffer,
PageManagerSharedPtr xPageManager ) :
mpPageManager(std::move( xPageManager )),
mpBuffer(std::move( xBuffer ))
{
const ::basegfx::B2ISize aImageSize(mpBuffer->getWidth(),mpBuffer->getHeight());
const ::basegfx::B2ISize aPageSize(mpPageManager->getPageSize());
const sal_Int32 aPageSizeX(aPageSize.getWidth());
const sal_Int32 aPageSizeY(aPageSize.getHeight());
const sal_Int32 aImageSizeX(aImageSize.getWidth());
const sal_Int32 aImageSizeY(aImageSize.getHeight());
// see if the size of the colorbuffer is larger than the size
// of a single page. if this is the case we divide the
// colorbuffer into as many surfaces as we need to get the
// whole area distributed. otherwise (the colorbuffer is
// smaller than the size of a single page) we search for free
// pages or create a new one.
// the incoming image is too large to fit into a single
// page. strategy: we split the image into rectangular
// areas that are as large as the maximum page size
// dictates and follow the strategy for fitting images.
size_t dwNumSurfaces(0);
for(sal_Int32 y=0; y<aImageSizeY; y+=aPageSizeY)
for(sal_Int32 x=0; x<aImageSizeX; x+=aPageSizeX)
++dwNumSurfaces;
maSurfaceList.reserve(dwNumSurfaces);
for(sal_Int32 y=0; y<aImageSizeY; y+=aPageSizeY)
{
for(sal_Int32 x=0; x<aImageSizeX; x+=aPageSizeX)
{
// the current surface is located at the position [x,y]
// and has the size [min(restx,pagesizex),min(resty,pagesizey)
::basegfx::B2IPoint aOffset(x,y);
::basegfx::B2ISize aSize( std::min( aImageSize.getWidth()-x,
aPageSize.getWidth() ),
std::min( aImageSize.getHeight()-y,
aPageSize.getHeight() ) );
maSurfaceList.push_back(
std::make_shared<Surface>(
mpPageManager,
mpBuffer,
aOffset,
aSize));
}
}
}
void SurfaceProxy::setColorBufferDirty()
{
for( const auto& rSurfacePtr : maSurfaceList )
rSurfacePtr->setColorBufferDirty();
}
bool SurfaceProxy::draw( double fAlpha,
const ::basegfx::B2DPoint& rPos,
const ::basegfx::B2DHomMatrix& rTransform )
{
for( const auto& rSurfacePtr : maSurfaceList )
rSurfacePtr->draw( fAlpha, rPos, rTransform );
return true;
}
bool SurfaceProxy::draw( double fAlpha,
const ::basegfx::B2DPoint& rPos,
const ::basegfx::B2DRange& rArea,
const ::basegfx::B2DHomMatrix& rTransform )
{
for( const auto& rSurfacePtr : maSurfaceList )
rSurfacePtr->drawRectangularArea( fAlpha, rPos, rArea, rTransform );
return true;
}
bool SurfaceProxy::draw( double fAlpha,
const ::basegfx::B2DPoint& rPos,
const ::basegfx::B2DPolyPolygon& rClipPoly,
const ::basegfx::B2DHomMatrix& rTransform )
{
const ::basegfx::triangulator::B2DTriangleVector aTriangulatedVector(
::basegfx::triangulator::triangulate(rClipPoly));
// we have now an explicit ::B2DTriangle and ::B2DTriangleVector,
// but I do not know enough about 'drawWithClip' or 'clipTriangleListOnRange'
// to adapt to that. Convert back to old three-point-in-polygon convention
::basegfx::B2DPolygon aTriangulatedPolygon;
aTriangulatedPolygon.reserve(aTriangulatedVector.size() * 3);
for(const auto& rCandidate : aTriangulatedVector)
{
aTriangulatedPolygon.append(rCandidate.getA());
aTriangulatedPolygon.append(rCandidate.getB());
aTriangulatedPolygon.append(rCandidate.getC());
}
// dump polygons
SAL_INFO("canvas", "Original clip polygon: " << basegfx::utils::exportToSvgD( rClipPoly, true, true, false ));
SAL_INFO("canvas", "Triangulated polygon: " << basegfx::utils::exportToSvgD(basegfx::B2DPolyPolygon(aTriangulatedPolygon), true, true, false ));
for( const auto& rSurfacePtr : maSurfaceList )
rSurfacePtr->drawWithClip( fAlpha, rPos, aTriangulatedPolygon, rTransform );
return true;
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
