This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
/
SDL_windows.c
129 lines (106 loc) · 3.78 KB
/
SDL_windows.c
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
/*
Simple DirectMedia Layer
Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "SDL_config.h"
#ifdef __WIN32__
#include "SDL_error.h"
#include "SDL_windows.h"
#include "SDL_assert.h"
#include <objbase.h> /* for CoInitialize/CoUninitialize */
XInputGetState_t SDL_XInputGetState = NULL;
XInputSetState_t SDL_XInputSetState = NULL;
XInputGetCapabilities_t SDL_XInputGetCapabilities = NULL;
DWORD SDL_XInputVersion = 0;
static HANDLE s_pXInputDLL = 0;
static int s_XInputDLLRefCount = 0;
int
WIN_LoadXInputDLL(void)
{
DWORD version = 0;
if (s_pXInputDLL) {
SDL_assert(s_XInputDLLRefCount > 0);
s_XInputDLLRefCount++;
return 0; /* already loaded */
}
version = (1 << 16) | 4;
s_pXInputDLL = LoadLibrary( L"XInput1_4.dll" ); // 1.4 Ships with Windows 8.
if (!s_pXInputDLL) {
version = (1 << 16) | 3;
s_pXInputDLL = LoadLibrary( L"XInput1_3.dll" ); // 1.3 Ships with Vista and Win7, can be installed as a restributable component.
}
if (!s_pXInputDLL) {
s_pXInputDLL = LoadLibrary( L"bin\\XInput1_3.dll" );
}
if (!s_pXInputDLL) {
return -1;
}
SDL_assert(s_XInputDLLRefCount == 0);
SDL_XInputVersion = version;
s_XInputDLLRefCount = 1;
/* 100 is the ordinal for _XInputGetStateEx, which returns the same struct as XinputGetState, but with extra data in wButtons for the guide button, we think... */
SDL_XInputGetState = (XInputGetState_t)GetProcAddress( (HMODULE)s_pXInputDLL, (LPCSTR)100 );
SDL_XInputSetState = (XInputSetState_t)GetProcAddress( (HMODULE)s_pXInputDLL, "XInputSetState" );
SDL_XInputGetCapabilities = (XInputGetCapabilities_t)GetProcAddress( (HMODULE)s_pXInputDLL, "XInputGetCapabilities" );
if ( !SDL_XInputGetState || !SDL_XInputSetState || !SDL_XInputGetCapabilities ) {
WIN_UnloadXInputDLL();
return -1;
}
return 0;
}
void
WIN_UnloadXInputDLL(void)
{
if ( s_pXInputDLL ) {
SDL_assert(s_XInputDLLRefCount > 0);
if (--s_XInputDLLRefCount == 0) {
FreeLibrary( s_pXInputDLL );
s_pXInputDLL = NULL;
}
} else {
SDL_assert(s_XInputDLLRefCount == 0);
}
}
/* Sets an error message based on GetLastError() */
void
WIN_SetError(const char *prefix)
{
TCHAR buffer[1024];
char *message;
FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(), 0,
buffer, SDL_arraysize(buffer), NULL);
message = WIN_StringToUTF8(buffer);
SDL_SetError("%s%s%s", prefix ? prefix : "", prefix ? ": " : "", message);
SDL_free(message);
}
HRESULT
WIN_CoInitialize(void)
{
const HRESULT hr = CoInitialize(NULL);
/* S_FALSE means success, but someone else already initialized. */
/* You still need to call CoUninitialize in this case! */
if (hr == S_FALSE) {
return S_OK;
}
return hr;
}
void
WIN_CoUninitialize(void)
{
CoUninitialize();
}
#endif /* __WIN32__ */
/* vi: set ts=4 sw=4 expandtab: */