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
|
{%MainUnit ../graphics.pp}
{ TSharedCustomBitmap
*****************************************************************************
This file is part of the Lazarus Component Library (LCL)
See the file COPYING.modifiedLGPL.txt, included in this distribution,
for details about the license.
*****************************************************************************
}
constructor TSharedCustomBitmap.Create;
begin
inherited Create;
FImage.Init;
end;
destructor TSharedCustomBitmap.Destroy;
begin
FreeAndNil(FSaveStream);
FreeHandle;
FreeImage;
inherited Destroy;
end;
procedure TSharedCustomBitmap.FreeHandle;
begin
FreePalette;
inherited FreeHandle;
end;
procedure TSharedCustomBitmap.FreeImage;
begin
FImage.FreeData;
FImage.Description.Format := ricfNone;
end;
procedure TSharedCustomBitmap.FreePalette;
begin
if FPalette = 0 then Exit;
DeleteObject(FPalette);
FPalette := 0;
end;
function TSharedCustomBitmap.GetHeight: Integer;
begin
if FImage.Description.Format = ricfNone
then Result := 0
else Result := FImage.Description.Height;
end;
function TSharedCustomBitmap.HandleAllocated: boolean;
begin
Result := FHandle <> 0;
end;
function TSharedCustomBitmap.ImageAllocated: boolean;
begin
Result := FImage.Description.Format <> ricfNone;
end;
function TSharedCustomBitmap.ReleasePalette: HPALETTE;
begin
Result := FPalette;
FPalette := 0;
end;
function TSharedCustomBitmap.GetPixelFormat: TPixelFormat;
begin
if FImage.Description.Format = ricfNone then Exit(pfDevice);
case FImage.Description.Depth of
1: Exit(pf1Bit);
4: Exit(pf4Bit);
8: Exit(pf8Bit);
15: Exit(pf15Bit);
16: Exit(pf16Bit);
24: Exit(pf24Bit);
32: Exit(pf32Bit);
end;
Result := pfCustom;
end;
function TSharedCustomBitmap.IsEmpty: boolean;
begin
Result := inherited IsEmpty and not
(
(FImage.Description.Format <> ricfNone) and
(FImage.Data <> nil) and
(FImage.DataSize <> 0)
);
end;
function TSharedCustomBitmap.GetWidth: Integer;
begin
if FImage.Description.Format = ricfNone
then Result := 0
else Result := FImage.Description.Width;
end;
// included by graphics.pp
|
