/
SDL_windowsmodes.c
454 lines (398 loc) · 14.7 KB
1
2
/*
Simple DirectMedia Layer
3
Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
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_internal.h"
#if SDL_VIDEO_DRIVER_WINDOWS
#include "SDL_windowsvideo.h"
26
#include "../../../include/SDL_assert.h"
27
28
29
30
31
32
/* Windows CE compatibility */
#ifndef CDS_FULLSCREEN
#define CDS_FULLSCREEN 0
#endif
33
typedef struct _WIN_GetMonitorDPIData {
34
35
36
SDL_VideoData *vid_data;
SDL_DisplayMode *mode;
SDL_DisplayModeData *mode_data;
37
38
39
40
} WIN_GetMonitorDPIData;
static BOOL CALLBACK
WIN_GetMonitorDPI(HMONITOR hMonitor,
41
42
43
HDC hdcMonitor,
LPRECT lprcMonitor,
LPARAM dwData)
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
WIN_GetMonitorDPIData *data = (WIN_GetMonitorDPIData*) dwData;
UINT hdpi, vdpi;
if (data->vid_data->GetDpiForMonitor(hMonitor, MDT_EFFECTIVE_DPI, &hdpi, &vdpi) == S_OK &&
hdpi > 0 &&
vdpi > 0) {
float hsize, vsize;
data->mode_data->HorzDPI = (float)hdpi;
data->mode_data->VertDPI = (float)vdpi;
// Figure out the monitor size and compute the diagonal DPI.
hsize = data->mode->w / data->mode_data->HorzDPI;
vsize = data->mode->h / data->mode_data->VertDPI;
data->mode_data->DiagDPI = SDL_ComputeDiagonalDPI( data->mode->w,
data->mode->h,
hsize,
vsize );
// We can only handle one DPI per display mode so end the enumeration.
return FALSE;
}
// We didn't get DPI information so keep going.
return TRUE;
71
72
}
73
74
static void
WIN_UpdateDisplayMode(_THIS, LPCTSTR deviceName, DWORD index, SDL_DisplayMode * mode)
75
{
76
SDL_VideoData *vid_data = (SDL_VideoData *) _this->driverdata;
77
SDL_DisplayModeData *data = (SDL_DisplayModeData *) mode->driverdata;
78
79
80
81
82
83
84
85
86
87
88
HDC hdc;
data->DeviceMode.dmFields =
(DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT | DM_DISPLAYFREQUENCY |
DM_DISPLAYFLAGS);
if (index == ENUM_CURRENT_SETTINGS
&& (hdc = CreateDC(deviceName, NULL, NULL, NULL)) != NULL) {
char bmi_data[sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD)];
LPBITMAPINFO bmi;
HBITMAP hbm;
89
90
91
int logical_width = GetDeviceCaps( hdc, HORZRES );
int logical_height = GetDeviceCaps( hdc, VERTRES );
92
93
data->ScaleX = (float)logical_width / data->DeviceMode.dmPelsWidth;
data->ScaleY = (float)logical_height / data->DeviceMode.dmPelsHeight;
94
95
96
97
98
99
100
mode->w = logical_width;
mode->h = logical_height;
// WIN_GetMonitorDPI needs mode->w and mode->h
// so only call after those are set.
if (vid_data->GetDpiForMonitor) {
WIN_GetMonitorDPIData dpi_data;
101
RECT monitor_rect;
102
103
104
105
dpi_data.vid_data = vid_data;
dpi_data.mode = mode;
dpi_data.mode_data = data;
106
107
monitor_rect.left = data->DeviceMode.dmPosition.x;
monitor_rect.top = data->DeviceMode.dmPosition.y;
108
109
monitor_rect.right = monitor_rect.left + 1;
monitor_rect.bottom = monitor_rect.top + 1;
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
EnumDisplayMonitors(NULL, &monitor_rect, WIN_GetMonitorDPI, (LPARAM)&dpi_data);
} else {
// We don't have the Windows 8.1 routine so just
// get system DPI.
data->HorzDPI = (float)GetDeviceCaps( hdc, LOGPIXELSX );
data->VertDPI = (float)GetDeviceCaps( hdc, LOGPIXELSY );
if (data->HorzDPI == data->VertDPI) {
data->DiagDPI = data->HorzDPI;
} else {
data->DiagDPI = SDL_ComputeDiagonalDPI( mode->w,
mode->h,
(float)GetDeviceCaps( hdc, HORZSIZE ) / 25.4f,
(float)GetDeviceCaps( hdc, VERTSIZE ) / 25.4f );
}
}
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
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:
mode->format = SDL_PIXELFORMAT_RGB888;
break;
case 0x000000FF:
mode->format = SDL_PIXELFORMAT_BGR888;
break;
case 0xF800:
mode->format = SDL_PIXELFORMAT_RGB565;
break;
case 0x7C00:
mode->format = SDL_PIXELFORMAT_RGB555;
break;
}
} else if (bmi->bmiHeader.biBitCount == 8) {
mode->format = SDL_PIXELFORMAT_INDEX8;
} else if (bmi->bmiHeader.biBitCount == 4) {
mode->format = SDL_PIXELFORMAT_INDEX4LSB;
}
155
} else if (mode->format == SDL_PIXELFORMAT_UNKNOWN) {
156
/* FIXME: Can we tell what this will be? */
157
158
if ((data->DeviceMode.dmFields & DM_BITSPERPEL) == DM_BITSPERPEL) {
switch (data->DeviceMode.dmBitsPerPel) {
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
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;
}
}
}
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
}
static SDL_bool
WIN_GetDisplayMode(_THIS, LPCTSTR deviceName, DWORD index, SDL_DisplayMode * mode)
{
SDL_DisplayModeData *data;
DEVMODE devmode;
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;
}
mode->driverdata = data;
data->DeviceMode = devmode;
/* Default basic information */
data->ScaleX = 1.0f;
data->ScaleY = 1.0f;
data->DiagDPI = 0.0f;
data->HorzDPI = 0.0f;
data->VertDPI = 0.0f;
mode->format = SDL_PIXELFORMAT_UNKNOWN;
mode->w = data->DeviceMode.dmPelsWidth;
mode->h = data->DeviceMode.dmPelsHeight;
mode->refresh_rate = data->DeviceMode.dmDisplayFrequency;
/* Fill in the mode information */
WIN_UpdateDisplayMode(_this, deviceName, index, mode);
216
217
218
219
return SDL_TRUE;
}
static SDL_bool
220
WIN_AddDisplay(_THIS, LPTSTR DeviceName)
221
222
223
224
225
226
227
228
229
{
SDL_VideoDisplay display;
SDL_DisplayData *displaydata;
SDL_DisplayMode mode;
DISPLAY_DEVICE device;
#ifdef DEBUG_MODES
printf("Display: %s\n", WIN_StringToUTF8(DeviceName));
#endif
230
if (!WIN_GetDisplayMode(_this, DeviceName, ENUM_CURRENT_SETTINGS, &mode)) {
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
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
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
return SDL_FALSE;
}
displaydata = (SDL_DisplayData *) SDL_malloc(sizeof(*displaydata));
if (!displaydata) {
return SDL_FALSE;
}
SDL_memcpy(displaydata->DeviceName, DeviceName,
sizeof(displaydata->DeviceName));
SDL_zero(display);
device.cb = sizeof(device);
if (EnumDisplayDevices(DeviceName, 0, &device, 0)) {
display.name = WIN_StringToUTF8(device.DeviceString);
}
display.desktop_mode = mode;
display.current_mode = mode;
display.driverdata = displaydata;
SDL_AddVideoDisplay(&display);
SDL_free(display.name);
return SDL_TRUE;
}
int
WIN_InitModes(_THIS)
{
int pass;
DWORD i, j, count;
DISPLAY_DEVICE device;
device.cb = sizeof(device);
/* Get the primary display in the first pass */
for (pass = 0; pass < 2; ++pass) {
for (i = 0; ; ++i) {
TCHAR DeviceName[32];
if (!EnumDisplayDevices(NULL, i, &device, 0)) {
break;
}
if (!(device.StateFlags & DISPLAY_DEVICE_ATTACHED_TO_DESKTOP)) {
continue;
}
if (pass == 0) {
if (!(device.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE)) {
continue;
}
} else {
if (device.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE) {
continue;
}
}
SDL_memcpy(DeviceName, device.DeviceName, sizeof(DeviceName));
#ifdef DEBUG_MODES
printf("Device: %s\n", WIN_StringToUTF8(DeviceName));
#endif
count = 0;
for (j = 0; ; ++j) {
if (!EnumDisplayDevices(DeviceName, j, &device, 0)) {
break;
}
if (!(device.StateFlags & DISPLAY_DEVICE_ATTACHED_TO_DESKTOP)) {
continue;
}
if (pass == 0) {
if (!(device.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE)) {
continue;
}
} else {
if (device.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE) {
continue;
}
}
304
count += WIN_AddDisplay(_this, device.DeviceName);
305
306
}
if (count == 0) {
307
WIN_AddDisplay(_this, DeviceName);
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
}
}
}
if (_this->num_displays == 0) {
return SDL_SetError("No displays available");
}
return 0;
}
int
WIN_GetDisplayBounds(_THIS, SDL_VideoDisplay * display, SDL_Rect * rect)
{
SDL_DisplayModeData *data = (SDL_DisplayModeData *) display->current_mode.driverdata;
rect->x = (int)SDL_ceil(data->DeviceMode.dmPosition.x * data->ScaleX);
rect->y = (int)SDL_ceil(data->DeviceMode.dmPosition.y * data->ScaleY);
rect->w = (int)SDL_ceil(data->DeviceMode.dmPelsWidth * data->ScaleX);
rect->h = (int)SDL_ceil(data->DeviceMode.dmPelsHeight * data->ScaleY);
return 0;
}
330
331
332
333
334
int
WIN_GetDisplayDPI(_THIS, SDL_VideoDisplay * display, float * ddpi, float * hdpi, float * vdpi)
{
SDL_DisplayModeData *data = (SDL_DisplayModeData *) display->current_mode.driverdata;
335
336
337
338
339
340
341
342
343
344
if (ddpi) {
*ddpi = data->DiagDPI;
}
if (hdpi) {
*hdpi = data->HorzDPI;
}
if (vdpi) {
*vdpi = data->VertDPI;
}
345
return data->DiagDPI != 0.0f ? 0 : SDL_SetError("Couldn't get DPI");
346
347
}
348
349
350
351
352
353
354
355
356
357
int
WIN_GetDisplayUsableBounds(_THIS, SDL_VideoDisplay * display, SDL_Rect * rect)
{
const SDL_DisplayModeData *data = (const SDL_DisplayModeData *) display->current_mode.driverdata;
const DEVMODE *pDevMode = &data->DeviceMode;
POINT pt = {
/* !!! FIXME: no scale, right? */
(LONG) (pDevMode->dmPosition.x + (pDevMode->dmPelsWidth / 2)),
(LONG) (pDevMode->dmPosition.y + (pDevMode->dmPelsHeight / 2))
};
358
HMONITOR hmon = MonitorFromPoint(pt, MONITOR_DEFAULTTONULL);
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
MONITORINFO minfo;
const RECT *work;
BOOL rc = FALSE;
SDL_assert(hmon != NULL);
if (hmon != NULL) {
SDL_zero(minfo);
minfo.cbSize = sizeof (MONITORINFO);
rc = GetMonitorInfo(hmon, &minfo);
SDL_assert(rc);
}
if (!rc) {
return SDL_SetError("Couldn't find monitor data");
}
376
work = &minfo.rcWork;
377
378
379
380
381
382
383
384
rect->x = (int)SDL_ceil(work->left * data->ScaleX);
rect->y = (int)SDL_ceil(work->top * data->ScaleY);
rect->w = (int)SDL_ceil((work->right - work->left) * data->ScaleX);
rect->h = (int)SDL_ceil((work->bottom - work->top) * data->ScaleY);
return 0;
}
385
386
387
388
389
390
391
392
void
WIN_GetDisplayModes(_THIS, SDL_VideoDisplay * display)
{
SDL_DisplayData *data = (SDL_DisplayData *) display->driverdata;
DWORD i;
SDL_DisplayMode mode;
for (i = 0;; ++i) {
393
if (!WIN_GetDisplayMode(_this, data->DeviceName, i, &mode)) {
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
break;
}
if (SDL_ISPIXELFORMAT_INDEXED(mode.format)) {
/* We don't support palettized modes now */
SDL_free(mode.driverdata);
continue;
}
if (mode.format != SDL_PIXELFORMAT_UNKNOWN) {
if (!SDL_AddDisplayMode(display, &mode)) {
SDL_free(mode.driverdata);
}
} else {
SDL_free(mode.driverdata);
}
}
}
int
WIN_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode)
{
SDL_DisplayData *displaydata = (SDL_DisplayData *) display->driverdata;
SDL_DisplayModeData *data = (SDL_DisplayModeData *) mode->driverdata;
LONG status;
if (mode->driverdata == display->desktop_mode.driverdata) {
419
status = ChangeDisplaySettingsEx(displaydata->DeviceName, NULL, NULL, CDS_FULLSCREEN, NULL);
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
} else {
status = ChangeDisplaySettingsEx(displaydata->DeviceName, &data->DeviceMode, NULL, CDS_FULLSCREEN, NULL);
}
if (status != DISP_CHANGE_SUCCESSFUL) {
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;
}
return SDL_SetError("ChangeDisplaySettingsEx() failed: %s", reason);
}
EnumDisplaySettings(displaydata->DeviceName, ENUM_CURRENT_SETTINGS, &data->DeviceMode);
442
WIN_UpdateDisplayMode(_this, displaydata->DeviceName, ENUM_CURRENT_SETTINGS, mode);
443
444
445
446
447
448
449
450
451
452
453
454
return 0;
}
void
WIN_QuitModes(_THIS)
{
/* All fullscreen windows should have restored modes by now */
}
#endif /* SDL_VIDEO_DRIVER_WINDOWS */
/* vi: set ts=4 sw=4 expandtab: */