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
219
220
221
222
223
224
225
226
|
unit UCovers;
interface
uses gl, Windows, Math, Classes, SysUtils, Graphics, UThemes, UTexture;
type
TCover = record
Name: string;
W: word;
H: word;
Size: integer;
Position: integer; // position of picture in the cache file
// Data: array of byte;
end;
TCovers = class
Cover: array of TCover;
W: word;
H: word;
Size: integer;
Data: array of byte;
WritetoFile: Boolean;
constructor Create;
procedure Load;
procedure Save;
procedure AddCover(Name: string);
function CoverExists(Name: string): boolean;
function CoverNumber(Name: string): integer;
procedure PrepareData(Name: string);
end;
var
Covers: TCovers;
implementation
uses UFiles, ULog, DateUtils;
constructor TCovers.Create;
begin
W := 128;
H := 128;
Size := W*H*3;
Load;
WritetoFile := True;
end;
procedure TCovers.Load;
var
F: File;
W: word;
H: word;
Bits: byte;
NLen: word;
Name: string;
// Data: array of byte;
begin
if FileExists(GamePath + 'covers.cache') then begin
AssignFile(F, GamePath + 'covers.cache');
Reset(F, 1);
WritetoFile := not FileIsReadOnly(GamePath + 'covers.cache');
SetLength(Cover, 0);
while not EOF(F) do begin
SetLength(Cover, Length(Cover)+1);
BlockRead(F, W, 2);
Cover[High(Cover)].W := W;
BlockRead(F, H, 2);
Cover[High(Cover)].H := H;
BlockRead(F, Bits, 1);
Cover[High(Cover)].Size := W * H * (Bits div 8);
// test
// W := 128;
// H := 128;
// Bits := 24;
// Seek(F, FilePos(F) + 3);
BlockRead(F, NLen, 2);
SetLength(Name, NLen);
BlockRead(F, Name[1], NLen);
Cover[High(Cover)].Name := Name;
Cover[High(Cover)].Position := FilePos(F);
Seek(F, FilePos(F) + W*H*(Bits div 8));
// SetLength(Cover[High(Cover)].Data, W*H*(Bits div 8));
// BlockRead(F, Cover[High(Cover)].Data[0], W*H*(Bits div 8));
end;
CloseFile(F);
end; // fileexists
end;
procedure TCovers.Save;
{
var
F: File;
C: integer; // cover number
W: word;
H: word;
NLen: word;
Bits: byte; }
begin
{ AssignFile(F, GamePath + 'covers.cache');
Rewrite(F, 1);
Bits := 24;
for C := 0 to High(Cover) do begin
W := Cover[C].W;
H := Cover[C].H;
BlockWrite(F, W, 2);
BlockWrite(F, H, 2);
BlockWrite(F, Bits, 1);
NLen := Length(Cover[C].Name);
BlockWrite(F, NLen, 2);
BlockWrite(F, Cover[C].Name[1], NLen);
BlockWrite(F, Cover[C].Data[0], W*H*(Bits div 8));
end;
CloseFile(F);}
end;
procedure TCovers.AddCover(Name: string);
var
//B: integer;
F: File;
//C: integer; // cover number
NLen: word;
Bits: byte;
begin
if not CoverExists(Name) then begin
SetLength(Cover, Length(Cover)+1);
Cover[High(Cover)].Name := Name;
Cover[High(Cover)].W := W;
Cover[High(Cover)].H := H;
Cover[High(Cover)].Size := Size;
// do not copy data. write them directly to file
// SetLength(Cover[High(Cover)].Data, Size);
// for B := 0 to Size-1 do
// Cover[High(Cover)].Data[B] := CacheMipmap[B];
if WritetoFile then
begin
AssignFile(F, GamePath + 'covers.cache');
if FileExists(GamePath + 'covers.cache') then begin
Reset(F, 1);
Seek(F, FileSize(F));
end else
Rewrite(F, 1);
Bits := 24;
BlockWrite(F, W, 2);
BlockWrite(F, H, 2);
BlockWrite(F, Bits, 1);
NLen := Length(Name);
BlockWrite(F, NLen, 2);
BlockWrite(F, Name[1], NLen);
Cover[High(Cover)].Position := FilePos(F);
BlockWrite(F, CacheMipmap[0], W*H*(Bits div 8));
CloseFile(F);
end;
end
else
Cover[High(Cover)].Position := 0;
end;
function TCovers.CoverExists(Name: string): boolean;
var
C: integer; // cover
begin
Result := false;
C := 0;
while (C <= High(Cover)) and (Result = false) do begin
if Cover[C].Name = Name then Result := true;
Inc(C);
end;
end;
function TCovers.CoverNumber(Name: string): integer;
var
C: integer;
begin
Result := -1;
C := 0;
while (C <= High(Cover)) and (Result = -1) do begin
if Cover[C].Name = Name then Result := C;
Inc(C);
end;
end;
procedure TCovers.PrepareData(Name: string);
var
F: File;
C: integer;
begin
if FileExists(GamePath + 'covers.cache') then begin
AssignFile(F, GamePath + 'covers.cache');
Reset(F, 1);
C := CoverNumber(Name);
SetLength(Data, Cover[C].Size);
if Length(Data) < 6 then beep;
Seek(F, Cover[C].Position);
BlockRead(F, Data[0], Cover[C].Size);
CloseFile(F);
end;
end;
end.
|
