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
|
/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2022 - Raw Material Software Limited
JUCE is an open source library subject to commercial or open-source
licensing.
By using JUCE, you agree to the terms of both the JUCE 7 End-User License
Agreement and JUCE Privacy Policy.
End User License Agreement: www.juce.com/juce-7-licence
Privacy Policy: www.juce.com/juce-privacy-policy
Or: You may also use this code under the terms of the GPL v3 (see
www.gnu.org/licenses).
JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
DISCLAIMED.
==============================================================================
*/
namespace juce
{
static void blurDataTriplets (uint8* d, int num, const int delta) noexcept
{
uint32 last = d[0];
d[0] = (uint8) ((d[0] + d[delta] + 1) / 3);
d += delta;
num -= 2;
do
{
const uint32 newLast = d[0];
d[0] = (uint8) ((last + d[0] + d[delta] + 1) / 3);
d += delta;
last = newLast;
}
while (--num > 0);
d[0] = (uint8) ((last + d[0] + 1) / 3);
}
static void blurSingleChannelImage (uint8* const data, const int width, const int height,
const int lineStride, const int repetitions) noexcept
{
jassert (width > 2 && height > 2);
for (int y = 0; y < height; ++y)
for (int i = repetitions; --i >= 0;)
blurDataTriplets (data + lineStride * y, width, 1);
for (int x = 0; x < width; ++x)
for (int i = repetitions; --i >= 0;)
blurDataTriplets (data + x, height, lineStride);
}
static void blurSingleChannelImage (Image& image, int radius)
{
const Image::BitmapData bm (image, Image::BitmapData::readWrite);
blurSingleChannelImage (bm.data, bm.width, bm.height, bm.lineStride, 2 * radius);
}
//==============================================================================
DropShadow::DropShadow (Colour shadowColour, const int r, Point<int> o) noexcept
: colour (shadowColour), radius (r), offset (o)
{
jassert (radius > 0);
}
void DropShadow::drawForImage (Graphics& g, const Image& srcImage) const
{
jassert (radius > 0);
if (srcImage.isValid())
{
Image shadowImage (srcImage.convertedToFormat (Image::SingleChannel));
shadowImage.duplicateIfShared();
blurSingleChannelImage (shadowImage, radius);
g.setColour (colour);
g.drawImageAt (shadowImage, offset.x, offset.y, true);
}
}
void DropShadow::drawForPath (Graphics& g, const Path& path) const
{
jassert (radius > 0);
auto area = (path.getBounds().getSmallestIntegerContainer() + offset)
.expanded (radius + 1)
.getIntersection (g.getClipBounds().expanded (radius + 1));
if (area.getWidth() > 2 && area.getHeight() > 2)
{
Image renderedPath (Image::SingleChannel, area.getWidth(), area.getHeight(), true);
{
Graphics g2 (renderedPath);
g2.setColour (Colours::white);
g2.fillPath (path, AffineTransform::translation ((float) (offset.x - area.getX()),
(float) (offset.y - area.getY())));
}
blurSingleChannelImage (renderedPath, radius);
g.setColour (colour);
g.drawImageAt (renderedPath, area.getX(), area.getY(), true);
}
}
static void drawShadowSection (Graphics& g, ColourGradient& cg, Rectangle<float> area,
bool isCorner, float centreX, float centreY, float edgeX, float edgeY)
{
cg.point1 = area.getRelativePoint (centreX, centreY);
cg.point2 = area.getRelativePoint (edgeX, edgeY);
cg.isRadial = isCorner;
g.setGradientFill (cg);
g.fillRect (area);
}
void DropShadow::drawForRectangle (Graphics& g, const Rectangle<int>& targetArea) const
{
ColourGradient cg (colour, 0, 0, colour.withAlpha (0.0f), 0, 0, false);
for (float i = 0.05f; i < 1.0f; i += 0.1f)
cg.addColour (1.0 - i, colour.withMultipliedAlpha (i * i));
const float radiusInset = (float) radius / 2.0f;
const float expandedRadius = (float) radius + radiusInset;
auto area = targetArea.toFloat().reduced (radiusInset) + offset.toFloat();
auto r = area.expanded (expandedRadius);
auto top = r.removeFromTop (expandedRadius);
auto bottom = r.removeFromBottom (expandedRadius);
drawShadowSection (g, cg, top.removeFromLeft (expandedRadius), true, 1.0f, 1.0f, 0, 1.0f);
drawShadowSection (g, cg, top.removeFromRight (expandedRadius), true, 0, 1.0f, 1.0f, 1.0f);
drawShadowSection (g, cg, top, false, 0, 1.0f, 0, 0);
drawShadowSection (g, cg, bottom.removeFromLeft (expandedRadius), true, 1.0f, 0, 0, 0);
drawShadowSection (g, cg, bottom.removeFromRight (expandedRadius), true, 0, 0, 1.0f, 0);
drawShadowSection (g, cg, bottom, false, 0, 0, 0, 1.0f);
drawShadowSection (g, cg, r.removeFromLeft (expandedRadius), false, 1.0f, 0, 0, 0);
drawShadowSection (g, cg, r.removeFromRight (expandedRadius), false, 0, 0, 1.0f, 0);
g.setColour (colour);
g.fillRect (area);
}
//==============================================================================
DropShadowEffect::DropShadowEffect() {}
DropShadowEffect::~DropShadowEffect() {}
void DropShadowEffect::setShadowProperties (const DropShadow& newShadow)
{
shadow = newShadow;
}
void DropShadowEffect::applyEffect (Image& image, Graphics& g, float scaleFactor, float alpha)
{
DropShadow s (shadow);
s.radius = roundToInt ((float) s.radius * scaleFactor);
s.colour = s.colour.withMultipliedAlpha (alpha);
s.offset.x = roundToInt ((float) s.offset.x * scaleFactor);
s.offset.y = roundToInt ((float) s.offset.y * scaleFactor);
s.drawForImage (g, image);
g.setOpacity (alpha);
g.drawImageAt (image, 0, 0);
}
} // namespace juce
|
