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
|
{ $Id: win32debug.pp 41387 2013-05-24 18:30:06Z juha $ }
{
------------------------------------
win32debug.pp - graphic dump utils
------------------------------------
@created(Fri Jun 1th WET 2007)
@lastmod($Date: 2013-05-24 20:30:06 +0200 (Fr, 24 Mai 2013) $)
@author(Marc Weustink <marc@@lazarus.dommelstein.net>)
This unit contains utility functions to show the contents of graphics
*****************************************************************************
This file is part of the Lazarus Component Library (LCL)
See the file COPYING.modifiedLGPL.txt, included in this distribution,
for details about the license.
*****************************************************************************
}
unit Win32Debug;
{$mode objfpc}{$H+}
interface
uses
Windows, SysUtils, Win32Extra;
procedure DbgDumpBitmap(ABitmap: HBITMAP; ATitle: String = ''; AUseBitBlt: Boolean = False; AWidth: Integer = -1; AHeight: Integer = -1);
procedure DbgDumpDC(ADC: HDC; ATitle: String = ''; AUseBitBlt: Boolean = False; AWidth: Integer = -1; AHeight: Integer = -1);
implementation
type
PDbgDumpInfo = ^TDbgDumpInfo;
TDbgDumpInfo = record
Width, Height: Integer;
OrgWidth, OrgHeight: Integer;
Bitmap: HBITMAP;
ColorIdx: Byte;
UseAlphaBlend: Boolean;
end;
function DbgWindowProc(Wnd: HWnd; Msg: UINT; WParam: WPAram; LParam: LPARAM): LRESULT; stdcall;
function GetInfo: Pointer;
begin
// grrr.... this function isn't mapped to GetWindowLong
{$ifdef CPU64}
Result := Pointer(GetWindowLongPtr(wnd, GWL_USERDATA));
{$else}
Result := Pointer(GetWindowLong(wnd, GWL_USERDATA));
{$endif}
end;
const
COLORS: array[0..7] of COLORREF = (
$00000000,
$000000FF,
$0000FF00,
$0000FFFF,
$00FF0000,
$00FF00FF,
$00FFFF00,
$00FFFFFF
);
var
Info: PDbgDumpInfo;
PS: TPaintStruct;
DC: HDC;
OldBmp: HBITMAP;
Blend: TBlendFunction;
br: HBRUSH;
begin
Result := 0;
case Msg of
WM_PAINT: begin
Info := GetInfo;
BeginPaint(Wnd, PS);
br := CreateSolidBrush(COLORS[Info^.ColorIdx and $7]);
FillRect(PS.hDC, PS.rcPaint, br);
DeleteObject(br);
DC := CreateCompatibleDC(PS.hdc);
OldBmp := SelectObject(DC, Info^.Bitmap);
if Info^.UseAlphaBlend
then begin
Blend.BlendOp := AC_SRC_OVER;
Blend.BlendFlags := 0;
Blend.SourceConstantAlpha := 255;
Blend.AlphaFormat := AC_SRC_ALPHA;
Win32Extra.AlphaBlend(PS.hDC, 0, 0, Info^.Width, Info^.Height, DC, 0,0, Info^.OrgWidth, Info^.OrgHeight, Blend);
end
else begin
BitBlt(PS.hDC, 0, 0, Info^.Width, Info^.Height, DC, 0,0, SRCCOPY);
end;
SelectObject(DC, OldBmp);
DeleteDC(DC);
EndPaint(Wnd, PS);
end;
WM_DESTROY: begin
Info := GetInfo;
DeleteObject(Info^.Bitmap);
Dispose(Info);
end;
WM_LBUTTONUP: begin
Info := GetInfo;
Info^.ColorIdx := (Info^.ColorIdx + 1) and $7;
InvalidateRect(Wnd, nil, False);
end;
else
Result := DefWindowProc(wnd, Msg, WParam, LParam);
end;
end;
var
MDbgClassCreated: Boolean = False;
procedure DbgCreateClass;
var
wc: TWndClass;
begin
if MDbgClassCreated then Exit;
FillByte(wc, SizeOf(wc), 0);
wc.style := CS_HREDRAW or CS_VREDRAW;
wc.lpfnWndProc := @DbgWindowProc;
wc.hInstance := hinstance;
wc.hbrBackground := GetStockObject(BLACK_BRUSH);
wc.lpszClassName := 'LazDbgWindow';
RegisterClass(wc);
MDbgClassCreated := True;
end;
procedure DbgCreateWindow(AInfo: PDbgDumpInfo; const ATitle: String);
var
window: HWND;
w, h: Integer;
begin
DbgCreateClass;
if AInfo^.Width < 50 then W := 50 else w := AInfo^.Width;
if AInfo^.Height < 25 then H := 25 else H := AInfo^.Height;
window := CreateWindowEx(WS_EX_TOOLWINDOW, 'LazDbgWindow', PChar(ATitle), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, W + 8, H+ 25, 0, 0, HINSTANCE, nil);
{$ifdef CPU64}
SetWindowLongPtr(window, GWL_USERDATA, PtrInt(AInfo));
{$else}
SetWindowLong(window, GWL_USERDATA, PtrInt(AInfo));
{$endif}
ShowWindow(window, SW_SHOWNOACTIVATE);
end;
procedure InternalDumpBitmap(ABitmap: HBITMAP; ADesc, ATitle: String; AWidth: Integer; AHeight: Integer; AUseBitBlt: Boolean);
var
Info: PDbgDumpInfo;
h,w,d: Integer;
WinBmp: Windows.TBitmap;
begin
New(Info);
if (ABitmap = 0)
or (Windows.GetObject(ABitmap, SizeOf(WinBmp), @WinBmp) = 0)
then begin
w := 0; h:= 0; d := 0;
Info^.Bitmap := 0;
if AWidth = -1 then AWidth := 0;
if AHeight = -1 then AHeight := 0;
end
else begin
w := WinBmp.bmWidth;
h := WinBmp.bmHeight;
d := WinBmp.bmBitsPixel;
if AWidth = -1 then AWidth := W;
if AHeight = -1 then AHeight := H;
Info^.Bitmap := CopyImage(ABitmap, IMAGE_BITMAP, AWidth, AHeight, 0);
end;
Info^.Width := AWidth;
Info^.Height := AHeight;
Info^.OrgWidth := w;
Info^.OrgHeight := h;
Info^.UseAlphaBlend := (d > 24) and not AUseBitBlt;
ATitle := ATitle + Format(' (%s W:%d H:%d D:%d)', [ADesc, w, h, d]);
DbgCreateWindow(Info, ATitle);
end;
procedure DbgDumpBitmap(ABitmap: HBITMAP; ATitle: String; AUseBitBlt: Boolean; AWidth, AHeight: Integer);
begin
InternalDumpBitmap(ABitmap, Format('Bitmap:$%x', [ABitmap]), ATitle, AWidth, AHeight, AUseBitBlt);
end;
procedure DbgDumpDC(ADC: HDC; ATitle: String; AUseBitBlt: Boolean; AWidth, AHeight: Integer);
var
bmp: HBITMAP;
begin
bmp := CreateBitmap(1,1,1,1,nil);
// select dummy to get selected bitmap
bmp := SelectObject(ADC, bmp);
InternalDumpBitmap(bmp, Format('DC:$%x', [ADC]), ATitle, AWidth, AHeight, AUseBitBlt);
// restore bitmap and delete dummy
DeleteObject(SelectObject(ADC, bmp));
end;
end.
|
