SDL_windowsmodes.c
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2018 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_internal.h"
#if SDL_VIDEO_DRIVER_WINDOWS
#include "SDL_windowsvideo.h"
#include "../../../include/SDL_assert.h"
#include "../../../include/SDL_log.h"
/* Windows CE compatibility */
#ifndef CDS_FULLSCREEN
#define CDS_FULLSCREEN 0
#endif
/* #define DEBUG_MODES */
static void
WIN_UpdateDisplayMode(_THIS, LPCTSTR deviceName, DWORD index, SDL_DisplayMode * mode)
{
SDL_DisplayModeData *data = (SDL_DisplayModeData *) mode->driverdata;
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;
int logical_width = GetDeviceCaps( hdc, HORZRES );
int logical_height = GetDeviceCaps( hdc, VERTRES );
mode->w = logical_width;
mode->h = logical_height;
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;
}
} else if (mode->format == SDL_PIXELFORMAT_UNKNOWN) {
/* FIXME: Can we tell what this will be? */
if ((data->DeviceMode.dmFields & DM_BITSPERPEL) == DM_BITSPERPEL) {
switch (data->DeviceMode.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;
}
}
}
}
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;
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);
return SDL_TRUE;
}
static SDL_bool
WIN_AddDisplay(_THIS, HMONITOR hMonitor, const MONITORINFOEX *info)
{
SDL_VideoDisplay display;
SDL_DisplayData *displaydata;
SDL_DisplayMode mode;
DISPLAY_DEVICE device;
#ifdef DEBUG_MODES
SDL_Log("Display: %s\n", WIN_StringToUTF8(info->szDevice));
#endif
if (!WIN_GetDisplayMode(_this, info->szDevice, ENUM_CURRENT_SETTINGS, &mode)) {
return SDL_FALSE;
}
displaydata = (SDL_DisplayData *) SDL_malloc(sizeof(*displaydata));
if (!displaydata) {
return SDL_FALSE;
}
SDL_memcpy(displaydata->DeviceName, info->szDevice,
sizeof(displaydata->DeviceName));
displaydata->MonitorHandle = hMonitor;
SDL_zero(display);
device.cb = sizeof(device);
if (EnumDisplayDevices(info->szDevice, 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;
}
typedef struct _WIN_AddDisplaysData {
SDL_VideoDevice *video_device;
SDL_bool want_primary;
} WIN_AddDisplaysData;
static BOOL CALLBACK
WIN_AddDisplaysCallback(HMONITOR hMonitor,
HDC hdcMonitor,
LPRECT lprcMonitor,
LPARAM dwData)
{
WIN_AddDisplaysData *data = (WIN_AddDisplaysData*)dwData;
MONITORINFOEX info;
SDL_zero(info);
info.cbSize = sizeof(info);
if (GetMonitorInfo(hMonitor, (LPMONITORINFO)&info) != 0) {
const SDL_bool is_primary = ((info.dwFlags & MONITORINFOF_PRIMARY) == MONITORINFOF_PRIMARY);
if (is_primary == data->want_primary) {
WIN_AddDisplay(data->video_device, hMonitor, &info);
}
}
// continue enumeration
return TRUE;
}
static void
WIN_AddDisplays(_THIS)
{
WIN_AddDisplaysData callback_data;
callback_data.video_device = _this;
callback_data.want_primary = SDL_TRUE;
EnumDisplayMonitors(NULL, NULL, WIN_AddDisplaysCallback, (LPARAM)&callback_data);
callback_data.want_primary = SDL_FALSE;
EnumDisplayMonitors(NULL, NULL, WIN_AddDisplaysCallback, (LPARAM)&callback_data);
}
int
WIN_InitModes(_THIS)
{
WIN_AddDisplays(_this);
if (_this->num_displays == 0) {
return SDL_SetError("No displays available");
}
return 0;
}
int
WIN_GetDisplayBounds(_THIS, SDL_VideoDisplay * display, SDL_Rect * rect)
{
const SDL_DisplayData *data = (const SDL_DisplayData *)display->driverdata;
MONITORINFO minfo;
BOOL rc;
SDL_zero(minfo);
minfo.cbSize = sizeof(MONITORINFO);
rc = GetMonitorInfo(data->MonitorHandle, &minfo);
if (!rc) {
return SDL_SetError("Couldn't find monitor data");
}
rect->x = minfo.rcMonitor.left;
rect->y = minfo.rcMonitor.top;
rect->w = minfo.rcMonitor.right - minfo.rcMonitor.left;
rect->h = minfo.rcMonitor.bottom - minfo.rcMonitor.top;
return 0;
}
int
WIN_GetDisplayDPI(_THIS, SDL_VideoDisplay * display, float * ddpi_out, float * hdpi_out, float * vdpi_out)
{
const SDL_DisplayData *displaydata = (SDL_DisplayData *)display->driverdata;
const SDL_VideoData *videodata = (SDL_VideoData *)display->device->driverdata;
float hdpi = 0, vdpi = 0, ddpi = 0;
if (videodata->GetDpiForMonitor) {
UINT hdpi_uint, vdpi_uint;
// Windows 8.1+ codepath
if (videodata->GetDpiForMonitor(displaydata->MonitorHandle, MDT_EFFECTIVE_DPI, &hdpi_uint, &vdpi_uint) == S_OK) {
// GetDpiForMonitor docs promise to return the same hdpi/vdpi
hdpi = (float)hdpi_uint;
vdpi = (float)hdpi_uint;
ddpi = (float)hdpi_uint;
} else {
return SDL_SetError("GetDpiForMonitor failed");
}
} else {
// Window 8.0 and below: same DPI for all monitors.
HDC hdc;
int hdpi_int, vdpi_int, hpoints, vpoints, hpix, vpix;
float hinches, vinches;
hdc = GetDC(NULL);
if (hdc == NULL) {
return SDL_SetError("GetDC failed");
}
hdpi_int = GetDeviceCaps(hdc, LOGPIXELSX);
vdpi_int = GetDeviceCaps(hdc, LOGPIXELSY);
ReleaseDC(NULL, hdc);
hpoints = GetSystemMetrics(SM_CXVIRTUALSCREEN);
vpoints = GetSystemMetrics(SM_CYVIRTUALSCREEN);
hpix = MulDiv(hpoints, hdpi_int, 96);
vpix = MulDiv(vpoints, vdpi_int, 96);
hinches = (float)hpoints / 96.0f;
vinches = (float)vpoints / 96.0f;
hdpi = (float)hdpi_int;
vdpi = (float)vdpi_int;
ddpi = SDL_ComputeDiagonalDPI(hpix, vpix, hinches, vinches);
}
if (ddpi_out) {
*ddpi_out = ddpi;
}
if (hdpi_out) {
*hdpi_out = hdpi;
}
if (vdpi_out) {
*vdpi_out = vdpi;
}
return ddpi != 0.0f ? 0 : SDL_SetError("Couldn't get DPI");
}
int
WIN_GetDisplayUsableBounds(_THIS, SDL_VideoDisplay * display, SDL_Rect * rect)
{
const SDL_DisplayData *data = (const SDL_DisplayData *)display->driverdata;
MONITORINFO minfo;
BOOL rc;
SDL_zero(minfo);
minfo.cbSize = sizeof(MONITORINFO);
rc = GetMonitorInfo(data->MonitorHandle, &minfo);
if (!rc) {
return SDL_SetError("Couldn't find monitor data");
}
rect->x = minfo.rcWork.left;
rect->y = minfo.rcWork.top;
rect->w = minfo.rcWork.right - minfo.rcWork.left;
rect->h = minfo.rcWork.bottom - minfo.rcWork.top;
return 0;
}
void
WIN_GetDisplayModes(_THIS, SDL_VideoDisplay * display)
{
SDL_DisplayData *data = (SDL_DisplayData *) display->driverdata;
DWORD i;
SDL_DisplayMode mode;
for (i = 0;; ++i) {
if (!WIN_GetDisplayMode(_this, data->DeviceName, i, &mode)) {
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) {
status = ChangeDisplaySettingsEx(displaydata->DeviceName, NULL, NULL, CDS_FULLSCREEN, NULL);
} 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);
WIN_UpdateDisplayMode(_this, displaydata->DeviceName, ENUM_CURRENT_SETTINGS, mode);
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: */
SDL_PIXELFORMAT_INDEX4LSB
Definition: SDL_pixels.h:180
SDL_TRUE
Definition: SDL_stdinc.h:142
WIN_QuitModes
void WIN_QuitModes(_THIS)
SDL_DisplayMode::w
int w
Definition: SDL_video.h:56
SDL_DisplayModeData::DeviceMode
DEVMODE DeviceMode
Definition: SDL_windowsmodes.h:34
SDL_ISPIXELFORMAT_INDEXED
#define SDL_ISPIXELFORMAT_INDEXED(format)
Definition: SDL_pixels.h:134
rect
SDL_Rect rect
Definition: testrelative.c:27
SDL_VideoDisplay::name
char * name
Definition: SDL_sysvideo.h:127
SDL_FALSE
Definition: SDL_stdinc.h:141
SDL_VideoDevice::driverdata
void * driverdata
Definition: SDL_sysvideo.h:377
SDL_DisplayMode
The structure that defines a display mode.
Definition: SDL_video.h:53
SDL_DisplayMode::refresh_rate
int refresh_rate
Definition: SDL_video.h:58
f
GLfloat f
Definition: SDL_opengl_glext.h:1870
data
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1974
Uint32
uint32_t Uint32
Definition: SDL_stdinc.h:181
WIN_InitModes
int WIN_InitModes(_THIS)
SDL_AddVideoDisplay
int SDL_AddVideoDisplay(const SDL_VideoDisplay *display)
Definition: SDL_video.c:606
SDL_DisplayData
Definition: SDL_cocoamodes.h:26
SDL_PIXELFORMAT_RGB888
Definition: SDL_pixels.h:236
SDL_PIXELFORMAT_BGR888
Definition: SDL_pixels.h:242
_this
static SDL_VideoDevice * _this
Definition: SDL_video.c:121
device
static SDL_AudioDeviceID device
Definition: loopwave.c:37
WIN_GetDisplayModes
void WIN_GetDisplayModes(_THIS, SDL_VideoDisplay *display)
SDL_DisplayModeData
Definition: SDL_cocoamodes.h:31
SDL_DisplayData::DeviceName
TCHAR DeviceName[32]
Definition: SDL_windowsmodes.h:28
SDL_Log
#define SDL_Log
Definition: SDL_dynapi_overrides.h:31
SDL_VideoDisplay::device
SDL_VideoDevice * device
Definition: SDL_sysvideo.h:136
SDL_memcpy
#define SDL_memcpy
Definition: SDL_dynapi_overrides.h:387
SDL_PIXELFORMAT_INDEX8
Definition: SDL_pixels.h:186
WIN_GetDisplayBounds
int WIN_GetDisplayBounds(_THIS, SDL_VideoDisplay *display, SDL_Rect *rect)
_THIS
#define _THIS
Definition: SDL_alsa_audio.h:31
SDL_free
#define SDL_free
Definition: SDL_dynapi_overrides.h:377
callback_data
Definition: testmultiaudio.c:24
SDL_DisplayMode::driverdata
void * driverdata
Definition: SDL_video.h:59
TRUE
#define TRUE
Definition: edid-parse.c:33
SDL_VideoDevice::num_displays
int num_displays
Definition: SDL_sysvideo.h:311
SDL_PIXELFORMAT_UNKNOWN
Definition: SDL_pixels.h:173
WIN_SetDisplayMode
int WIN_SetDisplayMode(_THIS, SDL_VideoDisplay *display, SDL_DisplayMode *mode)
SDL_VideoDisplay::current_mode
SDL_DisplayMode current_mode
Definition: SDL_sysvideo.h:132
mode
GLenum mode
Definition: SDL_opengl_glext.h:1122
WIN_StringToUTF8
#define WIN_StringToUTF8(S)
Definition: SDL_windows.h:46
SDL_zero
#define SDL_zero(x)
Definition: SDL_stdinc.h:416
SDL_DisplayMode::h
int h
Definition: SDL_video.h:57
SDL_Rect::x
int x
Definition: SDL_rect.h:66
S_OK
#define S_OK
Definition: SDL_directx.h:47
SDL_Rect::w
int w
Definition: SDL_rect.h:67
index
GLuint index
Definition: SDL_opengl_glext.h:660
BI_BITFIELDS
#define BI_BITFIELDS
Definition: SDL_bmp.c:48
SDL_VideoDisplay
Definition: SDL_sysvideo.h:125
i
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:50
NULL
#define NULL
Definition: begin_code.h:164
SDL_bool
SDL_bool
Definition: SDL_stdinc.h:139
SDL_VideoDisplay::desktop_mode
SDL_DisplayMode desktop_mode
Definition: SDL_sysvideo.h:131
SDL_SetError
#define SDL_SetError
Definition: SDL_dynapi_overrides.h:30
SDL_PIXELFORMAT_RGB565
Definition: SDL_pixels.h:224
SDL_Rect::h
int h
Definition: SDL_rect.h:67
SDL_VideoDevice
Definition: SDL_sysvideo.h:147
SDL_VideoData
Definition: SDL_androidvideo.h:35
SDL_PIXELFORMAT_RGB24
Definition: SDL_pixels.h:230
SDL_AddDisplayMode
SDL_bool SDL_AddDisplayMode(SDL_VideoDisplay *display, const SDL_DisplayMode *mode)
Definition: SDL_video.c:743
WIN_GetDisplayDPI
int WIN_GetDisplayDPI(_THIS, SDL_VideoDisplay *display, float *ddpi, float *hdpi, float *vdpi)
SDL_malloc
#define SDL_malloc
Definition: SDL_dynapi_overrides.h:374
SDL_DisplayData::MonitorHandle
HMONITOR MonitorHandle
Definition: SDL_windowsmodes.h:29
SDL_DisplayMode::format
Uint32 format
Definition: SDL_video.h:55
MDT_EFFECTIVE_DPI
Definition: SDL_windowsvideo.h:82
SDL_windowsvideo.h
SDL_Rect::y
int y
Definition: SDL_rect.h:66
SDL_ComputeDiagonalDPI
float SDL_ComputeDiagonalDPI(int hpix, int vpix, float hinches, float vinches)
Definition: SDL_video.c:3911
SDL_Rect
A rectangle, with the origin at the upper left.
Definition: SDL_rect.h:64
WIN_GetDisplayUsableBounds
int WIN_GetDisplayUsableBounds(_THIS, SDL_VideoDisplay *display, SDL_Rect *rect)
SDL_VideoDisplay::driverdata
void * driverdata
Definition: SDL_sysvideo.h:138
SDL_PIXELFORMAT_RGB555
Definition: SDL_pixels.h:194