This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
/
SDL_win32modes.c
280 lines (251 loc) · 8.34 KB
1
2
/*
SDL - Simple DirectMedia Layer
3
Copyright (C) 1997-2010 Sam Lantinga
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
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
#include "SDL_win32video.h"
static SDL_bool
WIN_GetDisplayMode(LPCTSTR deviceName, DWORD index, SDL_DisplayMode * mode)
{
SDL_DisplayModeData *data;
DEVMODE devmode;
HDC hdc;
devmode.dmSize = sizeof(devmode);
devmode.dmDriverExtra = 0;
if (!EnumDisplaySettings(deviceName, index, &devmode)) {
return SDL_FALSE;
}
data = (SDL_DisplayModeData *) SDL_malloc(sizeof(*data));
if (!data) {
return SDL_FALSE;
}
data->DeviceMode = devmode;
data->DeviceMode.dmFields =
(DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT | DM_DISPLAYFREQUENCY |
DM_DISPLAYFLAGS);
/* Fill in the mode information */
50
mode->format = SDL_PIXELFORMAT_UNKNOWN;
51
52
53
54
mode->w = devmode.dmPelsWidth;
mode->h = devmode.dmPelsHeight;
mode->refresh_rate = devmode.dmDisplayFrequency;
mode->driverdata = data;
55
56
#ifdef _WIN32_WCE
/* In WinCE EnumDisplaySettings(ENUM_CURRENT_SETTINGS) doesn't take the user defined orientation
57
into account but GetSystemMetrics does. */
58
59
60
if (index == ENUM_CURRENT_SETTINGS) {
mode->w = GetSystemMetrics(SM_CXSCREEN);
mode->h = GetSystemMetrics(SM_CYSCREEN);
61
62
}
#endif
63
64
65
/* WinCE has no GetDIBits, therefore we can't use it to get the display format */
#ifndef _WIN32_WCE
66
67
if (index == ENUM_CURRENT_SETTINGS
&& (hdc = CreateDC(deviceName, NULL, NULL, NULL)) != NULL) {
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
char bmi_data[sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD)];
LPBITMAPINFO bmi;
HBITMAP hbm;
SDL_zero(bmi_data);
bmi = (LPBITMAPINFO) bmi_data;
bmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
hbm = CreateCompatibleBitmap(hdc, 1, 1);
GetDIBits(hdc, hbm, 0, 1, NULL, bmi, DIB_RGB_COLORS);
GetDIBits(hdc, hbm, 0, 1, NULL, bmi, DIB_RGB_COLORS);
DeleteObject(hbm);
DeleteDC(hdc);
if (bmi->bmiHeader.biCompression == BI_BITFIELDS) {
switch (*(Uint32 *) bmi->bmiColors) {
case 0x00FF0000:
84
mode->format = SDL_PIXELFORMAT_RGB888;
85
86
break;
case 0x000000FF:
87
mode->format = SDL_PIXELFORMAT_BGR888;
88
89
break;
case 0xF800:
90
mode->format = SDL_PIXELFORMAT_RGB565;
91
92
break;
case 0x7C00:
93
mode->format = SDL_PIXELFORMAT_RGB555;
94
95
96
break;
}
} else if (bmi->bmiHeader.biBitCount == 8) {
97
mode->format = SDL_PIXELFORMAT_INDEX8;
98
99
} else if (bmi->bmiHeader.biBitCount == 4) {
mode->format = SDL_PIXELFORMAT_INDEX4LSB;
100
}
101
102
103
} else
#endif /* _WIN32_WCE */
{
104
/* FIXME: Can we tell what this will be? */
105
if ((devmode.dmFields & DM_BITSPERPEL) == DM_BITSPERPEL) {
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
switch (devmode.dmBitsPerPel) {
case 32:
mode->format = SDL_PIXELFORMAT_RGB888;
break;
case 24:
mode->format = SDL_PIXELFORMAT_RGB24;
break;
case 16:
mode->format = SDL_PIXELFORMAT_RGB565;
break;
case 15:
mode->format = SDL_PIXELFORMAT_RGB555;
break;
case 8:
mode->format = SDL_PIXELFORMAT_INDEX8;
break;
case 4:
mode->format = SDL_PIXELFORMAT_INDEX4LSB;
break;
}
126
}
127
128
129
130
}
return SDL_TRUE;
}
131
static SDL_bool
132
133
134
135
136
137
138
139
140
141
WIN_AddDisplay(LPTSTR DeviceName)
{
SDL_VideoDisplay display;
SDL_DisplayData *displaydata;
SDL_DisplayMode mode;
#ifdef DEBUG_MODES
printf("Display: %s\n", WIN_StringToUTF8(DeviceName));
#endif
if (!WIN_GetDisplayMode(DeviceName, ENUM_CURRENT_SETTINGS, &mode)) {
142
return SDL_FALSE;
143
144
145
146
}
displaydata = (SDL_DisplayData *) SDL_malloc(sizeof(*displaydata));
if (!displaydata) {
147
return SDL_FALSE;
148
149
150
151
152
153
154
155
156
}
SDL_memcpy(displaydata->DeviceName, DeviceName,
sizeof(displaydata->DeviceName));
SDL_zero(display);
display.desktop_mode = mode;
display.current_mode = mode;
display.driverdata = displaydata;
SDL_AddVideoDisplay(&display);
157
return SDL_TRUE;
158
159
}
160
int
161
162
163
WIN_InitModes(_THIS)
{
SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
164
DWORD i, j, count;
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
DISPLAY_DEVICE device;
device.cb = sizeof(device);
for (i = 0;; ++i) {
TCHAR DeviceName[32];
if (!EnumDisplayDevices(NULL, i, &device, 0)) {
break;
}
if (!(device.StateFlags & DISPLAY_DEVICE_ATTACHED_TO_DESKTOP)) {
continue;
}
SDL_memcpy(DeviceName, device.DeviceName, sizeof(DeviceName));
#ifdef DEBUG_MODES
printf("Device: %s\n", WIN_StringToUTF8(DeviceName));
#endif
181
count = 0;
182
183
184
185
186
187
188
for (j = 0;; ++j) {
if (!EnumDisplayDevices(DeviceName, j, &device, 0)) {
break;
}
if (!(device.StateFlags & DISPLAY_DEVICE_ATTACHED_TO_DESKTOP)) {
continue;
}
189
count += WIN_AddDisplay(device.DeviceName);
190
}
191
if (count == 0) {
192
WIN_AddDisplay(DeviceName);
193
194
}
}
195
196
197
198
199
if (_this->num_displays == 0) {
SDL_SetError("No displays available");
return -1;
}
return 0;
200
201
}
202
203
204
205
206
207
208
209
210
211
212
213
int
WIN_GetDisplayBounds(_THIS, SDL_VideoDisplay * display, SDL_Rect * rect)
{
SDL_DisplayModeData *data = (SDL_DisplayModeData *) display->desktop_mode.driverdata;
rect->x = (int)data->DeviceMode.dmPosition.x;
rect->y = (int)data->DeviceMode.dmPosition.y;
rect->w = data->DeviceMode.dmPelsWidth;
rect->h = data->DeviceMode.dmPelsHeight;
return 0;
}
214
void
215
WIN_GetDisplayModes(_THIS, SDL_VideoDisplay * display)
216
{
217
SDL_DisplayData *data = (SDL_DisplayData *) display->driverdata;
218
219
220
221
222
223
224
DWORD i;
SDL_DisplayMode mode;
for (i = 0;; ++i) {
if (!WIN_GetDisplayMode(data->DeviceName, i, &mode)) {
break;
}
225
if (mode.format != SDL_PIXELFORMAT_UNKNOWN) {
226
if (!SDL_AddDisplayMode(display, &mode)) {
227
SDL_free(mode.driverdata);
228
}
229
}
230
231
232
233
}
}
int
234
WIN_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode)
235
{
236
SDL_DisplayData *displaydata = (SDL_DisplayData *) display->driverdata;
237
238
SDL_DisplayModeData *data = (SDL_DisplayModeData *) mode->driverdata;
LONG status;
239
240
241
242
243
#ifdef _WIN32_WCE
/* TODO: implement correctly.
On my Asus MyPAL, if I execute the code below
I get DISP_CHANGE_BADFLAGS and the Titlebar of the fullscreen window stays
244
visible ... (SDL_RaiseWindow() would fix that one) */
245
246
return 0;
#endif
247
248
status =
249
250
ChangeDisplaySettingsEx(displaydata->DeviceName, &data->DeviceMode,
NULL, CDS_FULLSCREEN, NULL);
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
if (status == DISP_CHANGE_SUCCESSFUL) {
return 0;
} else {
const char *reason = "Unknown reason";
switch (status) {
case DISP_CHANGE_BADFLAGS:
reason = "DISP_CHANGE_BADFLAGS";
break;
case DISP_CHANGE_BADMODE:
reason = "DISP_CHANGE_BADMODE";
break;
case DISP_CHANGE_BADPARAM:
reason = "DISP_CHANGE_BADPARAM";
break;
case DISP_CHANGE_FAILED:
reason = "DISP_CHANGE_FAILED";
break;
}
SDL_SetError("ChangeDisplaySettingsEx() failed: %s", reason);
return -1;
}
}
void
WIN_QuitModes(_THIS)
{
ChangeDisplaySettingsEx(NULL, NULL, NULL, 0, NULL);
}
/* vi: set ts=4 sw=4 expandtab: */