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
213
214
215
216
217
218
|
/* This file is part of the KDE libraries
Copyright (C) 1998, 1999 Christian Tibirna <ctibirna@total.net>
(C) 1998, 1999 Daniel M. Duley <mosfet@kde.org>
(C) 1998, 1999 Dirk Mueller <mueller@kde.org>
*/
// $Id$
#ifndef __KPIXMAP_EFFECT_H
#define __KPIXMAP_EFFECT_H
#include <kdelibs_export.h>
#include <tqsize.h>
class KPixmap;
class TQColor;
/**
* This class includes various pixmap-based graphical effects.
*
* Everything is
* static, so there is no need to create an instance of this class. You can
* just call the static methods. They are encapsulated here merely to provide
* a common namespace.
*/
class TDEFX_EXPORT KPixmapEffect
{
public:
enum GradientType { VerticalGradient, HorizontalGradient,
DiagonalGradient, CrossDiagonalGradient,
PyramidGradient, RectangleGradient,
PipeCrossGradient, EllipticGradient };
enum RGBComponent { Red, Green, Blue };
enum Lighting {NorthLite, NWLite, WestLite, SWLite,
SouthLite, SELite, EastLite, NELite};
/**
* Creates a gradient from color a to color b of the specified type.
*
* @param pixmap The pixmap to process.
* @param ca Color a.
* @param cb Color b.
* @param type The type of gradient.
* @param ncols The number of colors to use when not running on a
* truecolor display. The gradient will be dithered to this number of
* colors. Pass 0 to prevent dithering.
* @return Returns the generated pixmap, for convenience.
*/
static KPixmap& gradient(KPixmap& pixmap, const TQColor &ca, const TQColor &cb,
GradientType type, int ncols=3);
/**
* Creates an unbalanced gradient.
*
* An unbalanced gradient is a gradient where the transition from
* color a to color b is not linear, but in this case, exponential.
*
* @param pixmap The pixmap that should be written.
* @param ca Color a.
* @param cb Color b.
* @param type The type of gradient.
* @param xfactor The x decay length. Use a value between -200 and 200.
* @param yfactor The y decay length.
* @param ncols The number of colors. See #gradient.
* @return The generated pixmap, for convencience.
*/
static KPixmap& unbalancedGradient(KPixmap& pixmap, const TQColor &ca,
const TQColor &cb, GradientType type, int xfactor = 100,
int yfactor = 100, int ncols=3);
/**
* Creates a pixmap of a given size with the given pixmap.
*
* if the
* given size is bigger than the size of the pixmap, the pixmap is
* tiled.
*
* @param pixmap This is the source pixmap
* @param size The size the new pixmap should have.
* @return The generated, tiled pixmap.
*/
static KPixmap createTiled(const KPixmap& pixmap, TQSize size);
/**
* Either brightens or dims a pixmap by a specified ratio.
*
* @param pixmap The pixmap to process.
* @param ratio The ratio to use. Use negative value to dim.
* @return Returns The pixmap(), provided for convenience.
*/
static KPixmap& intensity(KPixmap& pixmap, float ratio);
/**
* Modifies the intensity of a pixmap's RGB channel component.
*
* @param pixmap The pixmap to process.
* @param ratio value. Use negative value to dim.
* @param channel Which channel(s) should be modified
* @return Returns the pixmap(), provided for convenience.
*/
static KPixmap& channelIntensity(KPixmap& pixmap, float ratio,
RGBComponent channel);
/**
* Blends the provided pixmap into a background of the indicated color.
*
* @param pixmap The pixmap to process.
* @param initial_intensity this parameter takes values from -1 to 1:
* @li If positive, it tells how much to fade the image in its
* less affected spot.
* @li If negative, it tells roughly indicates how much of the image
* remains unaffected
* @param bgnd Indicates the color of the background to blend in.
* @param eff Lets you choose what kind of blending you like.
* @param anti_dir Blend in the opposite direction (makes no much sense
* with concentric blending effects).
* @param ncols The number of colors to dither the pixmap to. Only
* used for 8 bpp pixmaps.
* @return Returns the pixmap(), provided for convenience.
*/
static KPixmap& blend(KPixmap& pixmap, float initial_intensity,
const TQColor &bgnd, GradientType eff,
bool anti_dir=false, int ncols=3);
/**
* Builds a hash on any given pixmap.
*
* @param pixmap The pixmap to process.
* @param lite The hash faces the indicated lighting (cardinal poles)
* @param spacing How many unmodified pixels inbetween hashes.
* @param ncols The number of colors to dither the pixmap to.
* Only used for 8 bpp pixmaps.
* @return Returns The pixmap(), provided for convenience.
*/
static KPixmap& hash(KPixmap& pixmap, Lighting lite=NorthLite,
unsigned int spacing=0, int ncols=3);
/**
* Creates a pattern from a pixmap.
*
* The given pixmap is "flattened"
* between color a to color b.
* Doesn't change the original pixmap.
*
* @param pixmap The pixmap to process.
* @param size The size of the returned pixmap. If @p size is larger than
* the original, the resulting pixmap will be tiled.
* @param ca Color a.
* @param cb Color b.
* @param ncols The number of colors to use. The image will be
* dithered to this depth. Pass zero to prevent dithering.
* @return The resulting pixmap.
*/
static KPixmap pattern(const KPixmap& pixmap, TQSize size,
const TQColor &ca, const TQColor &cb, int ncols=8);
/**
* Fades a pixmap to a certain color.
*
* @param pixmap The pixmap to process.
* @param val The strength of the effect. 0 <= val <= 1.
* @param color The color to blend to.
* @return Returns the pixmap(), provided for convenience.
*/
static KPixmap& fade(KPixmap& pixmap, double val, const TQColor &color);
/**
* Converts a pixmap to grayscale.
*
* @param pixmap The pixmap to process.
* @param fast Set to @p true in order to use a faster but non-photographic
* quality algorithm. Appropriate for things such as toolbar icons.
* @return Returns the pixmap(), provided for convenience.
*/
static KPixmap& toGray(KPixmap& pixmap, bool fast=false);
/**
* Desaturates a pixmap.
*
* @param pixmap The pixmap to process.
* @param desat A value between 0 and 1 setting the degree of desaturation
* @return Returns The pixmap(), provided for convenience.
*/
static KPixmap& desaturate(KPixmap& pixmap, float desat = 0.3);
/**
* Modifies the contrast of a pixmap.
*
* @param pixmap The pixmap to process.
* @param c A contrast value between -255 and 255.
* @return Returns the pixmap(), provided for convenience.
*/
static KPixmap& contrast(KPixmap& pixmap, int c);
/**
* Dithers a pixmap using Floyd-Steinberg dithering for low-color
* situations.
*
* @param pixmap The pixmap to process.
* @param palette The color palette to use.
* @param size The size of the palette.
* @return Returns the pixmap(), provided for convenience.
*/
static KPixmap& dither(KPixmap &pixmap, const TQColor *palette, int size);
/**
* Calculate a 'selected' pixmap, for instance a selected icon
* on the desktop.
* @param pixmap the pixmap to select
* @param col the selected color, usually from TQColorGroup::highlight().
*/
static KPixmap selectedPixmap( const KPixmap &pixmap, const TQColor &col );
};
#endif
|
