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
|
// asview.cpp : Defines the entry point for the application.
//
#include "stdafx.h"
void usage()
{
printf( "Usage: asview [-h]|[image]\n");
printf( "Where: image - filename of the image to display.\n");
}
LRESULT CALLBACK MyWindowProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
void show_system_error();
HINSTANCE hinst;
HWND hWnd = NULL ;
void *bmbits = NULL ;
BITMAPINFO *bmi = NULL ;
int APIENTRY
WinMain(HINSTANCE hInstance, HINSTANCE, LPSTR lpCmdLine, int nCmdShow)
{
char *image_file = "../apps/rose512.jpg" ;
// char *image_file = "../apps/fore.xpm" ;
ASImage *im ;
WNDCLASSEX wnd_class ;
ASVisual *asv ;
MSG msg;
if( lpCmdLine != NULL && strncmp( lpCmdLine, "-h", 2 ) == 0 )
{
usage();
return 0;
}else if( lpCmdLine != NULL && strlen(lpCmdLine) > 0 )
image_file = lpCmdLine ;
else
usage();
if( image_file[0] == '\"' )
{
int i = 0;
while( image_file[i+1] != '\0' && image_file[i+1] != '\"')
{
image_file[i] = image_file[i+1] ;
++i ;
}
image_file[i] = '\0' ;
}
asv = create_asvisual( NULL, 0, 0, NULL );
im = file2ASImage( image_file, 0xFFFFFFFF, SCREEN_GAMMA, 0, NULL );
if( im == NULL )
{
MessageBox( NULL, "Unable to load image from file.", image_file, MB_OK | MB_ICONINFORMATION );
return 0 ;
}
/* converting result into BMP file ( as an example ) */
/* ASImage2file( im, NULL, "asview.bmp", ASIT_Bmp, NULL ); */
/* The following could be used to dump JPEG version of the image into
* stdout : */
/* ASImage2file( im, NULL, NULL, ASIT_Jpeg, NULL ); */
bmbits = NULL ;
// Convert ASImage into DIB:
bmi = ASImage2DBI( asv, im, 0, 0, im->width, im->height, &bmbits );
if( bmi == NULL )
{
MessageBox( NULL, "Failed to convert image into Windows bitmap.", image_file, MB_OK | MB_ICONINFORMATION );
return 0 ;
}
memset( &wnd_class, 0x00, sizeof(wnd_class));
wnd_class.cbSize = sizeof(wnd_class);
wnd_class.hInstance = hInstance ;
wnd_class.lpszClassName = "ASView" ;
wnd_class.lpfnWndProc = MyWindowProc ;
wnd_class.hIcon = LoadIcon((HINSTANCE) NULL, IDI_APPLICATION);
wnd_class.hCursor = LoadCursor((HINSTANCE) NULL, IDC_ARROW);
wnd_class.hbrBackground = (struct HBRUSH__ *)GetStockObject(WHITE_BRUSH);
if( !RegisterClassEx( &wnd_class ) )
{
show_system_error();
return 0 ;
}
hinst = hInstance ;
/* Now let us create a window and display image in that window : */
hWnd = CreateWindow( "ASView", image_file,
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
bmi->bmiHeader.biWidth, bmi->bmiHeader.biHeight,
(HWND) NULL, (HMENU)NULL, hinst, NULL );
if (!hWnd)
{
show_system_error();
return FALSE;
}
// Show the window and paint its contents.
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
// Start the message loop.
while (GetMessage(&msg, hWnd, 0, 0) > 0 )
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return 0;
}
LRESULT CALLBACK
MyWindowProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
if( uMsg == WM_PAINT )
{
// Paint image in responce to WM_PAINT event :
if( bmi != NULL && bmbits != NULL )
{
PAINTSTRUCT ps ;
HDC dc = BeginPaint(hWnd, &ps );
StretchDIBits( dc, // handle to device context
0, 0, bmi->bmiHeader.biWidth, bmi->bmiHeader.biHeight,
0, 0, bmi->bmiHeader.biWidth, bmi->bmiHeader.biHeight,
bmbits, bmi, DIB_RGB_COLORS, SRCCOPY );
EndPaint(hWnd, &ps );
}
return 0;
}
return DefWindowProc( hwnd, uMsg, wParam, lParam ) ;
}
void
show_system_error()
{
LPVOID lpMsgBuf;
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR) &lpMsgBuf,
0, NULL );
MessageBox( NULL, (LPCTSTR)lpMsgBuf, "ASView System Error", MB_OK | MB_ICONINFORMATION );
// Free the buffer.
LocalFree( lpMsgBuf );
}
|
