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
|
(*
GTK-Kylix Library: GTKPixbuf - Image handling routines
Version 0.6.2 (last updated 2003-03-30)
Copyright (C) 2003 Tomas Bzatek <tbzatek@users.sourceforge.net>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307 USA.
*)
unit GTKPixbuf;
interface
uses lazglib2, gdk2pixbuf, gtk2, Classes, GTKControls, GTKStdCtrls;
type
TGTKIconSize = (isInvalid, isMenu, isSmallToolbar, isLargeToolbar, isButton, isDND, isDialog);
(****************************************** TGDKPIXBUF **************************************************************************)
TGDKPixbuf = class (TComponent)
private
function GetWidth: integer;
function GetHeight: integer;
function GetBPP: integer;
protected
public
FPixbuf: PGdkPixbuf;
constructor Create(AOwner: TComponent); override;
constructor CreateNew(AOwner: TComponent; const Width, Height, BPP: integer; const HasAlpha: boolean);
destructor Destroy; override;
function LoadFromFile(const FileName: string): boolean;
function LoadFromXPM(const Data: PPChar): boolean;
function LoadFromInline(Data: Pointer): boolean;
procedure Fill(const Pixel: Cardinal);
procedure ScaleSimple(const DestWidth, DestHeight: integer);
function Copy: PGdkPixbuf;
procedure CopyArea(Source: TGDKPixbuf; SourceX, SourceY, SourceWidth, SourceHeight, DestX, DestY: integer);
procedure SetFromStock(Stock_ID: string; IconSize: TGTKIconSize);
published
property Width: integer read GetWidth;
property Height: integer read GetHeight;
property BPP: integer read GetBPP;
end;
(****************************************** TGTKIMAGE ***************************************************************************)
TGTKImage = class(TGTKMisc)
private
protected
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure LoadFromFile(const FileName: string);
procedure SetFromPixbuf(Pixbuf: TGDKPixbuf);
function GetPixbuf: PGdkPixbuf;
procedure CopyFromPixbuf(Pixbuf: TGDKPixbuf);
procedure SetFromStock(Stock_ID: string; IconSize: TGTKIconSize);
end;
(********************************************************************************************************************************)
(********************************************************************************************************************************)
implementation
uses SysUtils, DateUtils;
(********************************************************************************************************************************)
(********************************************************************************************************************************)
constructor TGDKPixbuf.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FPixbuf := nil;
end;
constructor TGDKPixbuf.CreateNew(AOwner: TComponent; const Width, Height, BPP: integer; const HasAlpha: boolean);
begin
inherited Create(AOwner);
FPixbuf := gdk_pixbuf_new(GDK_COLORSPACE_RGB, HasAlpha, BPP, Width, Height);
end;
destructor TGDKPixbuf.Destroy;
begin
if FPixbuf <> nil then gdk_pixbuf_unref(FPixbuf);
inherited Destroy;
end;
function TGDKPixbuf.GetWidth: integer;
begin
Result := gdk_pixbuf_get_width(FPixbuf);
end;
function TGDKPixbuf.GetHeight: integer;
begin
Result := gdk_pixbuf_get_height(FPixbuf);
end;
function TGDKPixbuf.GetBPP: integer;
begin
Result := gdk_pixbuf_get_bits_per_sample(FPixbuf);
end;
function TGDKPixbuf.LoadFromFile(const FileName: string): boolean;
var P: Pointer;
Error: PGError;
begin
Error := nil;
P := gdk_pixbuf_new_from_file(PChar(FileName), @Error);
Result := P <> nil;
if P <> nil then FPixbuf := P;
end;
function TGDKPixbuf.LoadFromXPM(const Data: PPChar): boolean;
var P: Pointer;
begin
P := gdk_pixbuf_new_from_xpm_data(Data);
Result := P <> nil;
if P <> nil then FPixbuf := P;
end;
function TGDKPixbuf.LoadFromInline(Data: Pointer): boolean;
var P: Pointer;
Error: PGError;
begin
Error := nil;
P := gdk_pixbuf_new_from_inline(-1, Pguint8(Data)^, True, @Error);
Result := P <> nil;
if Error <> nil then begin
WriteLn('TGDKPixbuf.LoadFromInline error: ', Error^.message);
g_error_free(Error);
end;
if P <> nil then FPixbuf := P;
end;
procedure TGDKPixbuf.Fill(const Pixel: Cardinal);
begin
gdk_pixbuf_fill(FPixbuf, Pixel);
end;
procedure TGDKPixbuf.ScaleSimple(const DestWidth, DestHeight: integer);
begin
FPixbuf := gdk_pixbuf_scale_simple(FPixbuf, DestWidth, DestHeight, GDK_INTERP_BILINEAR);
end;
function TGDKPixbuf.Copy: PGdkPixbuf;
begin
Result := gdk_pixbuf_copy(FPixbuf);
end;
procedure TGDKPixbuf.CopyArea(Source: TGDKPixbuf; SourceX, SourceY, SourceWidth, SourceHeight, DestX, DestY: integer);
begin
gdk_pixbuf_copy_area(Source.FPixbuf, SourceX, SourceY, SourceWidth, SourceHeight, FPixbuf, DestX, DestY);
end;
procedure TGDKPixbuf.SetFromStock(Stock_ID: string; IconSize: TGTKIconSize);
begin
FPixbuf := gtk_widget_render_icon(gtk_label_new(nil), PChar(Stock_ID), Ord(IconSize), nil);
end;
(********************************************************************************************************************************)
(********************************************************************************************************************************)
constructor TGTKImage.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FWidget := gtk_image_new;
Show;
end;
destructor TGTKImage.Destroy;
begin
inherited Destroy;
end;
procedure TGTKImage.LoadFromFile(const FileName: string);
begin
gtk_image_set_from_file(PGtkImage(FWidget), PChar(FileName));
end;
function TGTKImage.GetPixbuf: PGdkPixbuf;
begin
Result := gtk_image_get_pixbuf(PGtkImage(FWidget));
end;
procedure TGTKImage.SetFromPixbuf(Pixbuf: TGDKPixbuf);
begin
gtk_image_set_from_pixbuf(PGtkImage(FWidget), Pixbuf.FPixbuf);
end;
procedure TGTKImage.CopyFromPixbuf(Pixbuf: TGDKPixbuf);
begin
gtk_image_set_from_pixbuf(PGtkImage(FWidget), Pixbuf.Copy);
end;
procedure TGTKImage.SetFromStock(Stock_ID: string; IconSize: TGTKIconSize);
begin
gtk_image_set_from_stock(PGtkImage(FWidget), PChar(Stock_ID), Ord(IconSize));
end;
(********************************************************************************************************************************)
end.
|
