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Fixed display mode calculations for applications which are not DPI aware.

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If your application wants to have access to the full resolution even when the system has DPI scaling enabled, call SetProcessDPIAware() before calling SDL_Init()

e.g.
	typedef BOOL (WINAPI *SetProcessDPIAware_t)(void);
	HMODULE hMod = LoadLibrary("user32.dll");
	if ( hMod ) {
		SetProcessDPIAware_t pSetProcessDPIAware = GetProcAddress( hMod, "SetProcessDPIAware" );
		if ( pSetProcessDPIAware ) {
			pSetProcessDPIAware();
		}
		FreeLibrary( hMod );
	}
This commit is contained in:
Sam Lantinga 2013-12-30 12:49:15 -08:00
parent 6915319683
commit b44e7470de
2 changed files with 17 additions and 7 deletions
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22
src/video/windows/SDL_windowsmodes.c
View file

@ -50,6 +50,8 @@ WIN_GetDisplayMode(LPCTSTR deviceName, DWORD index, SDL_DisplayMode * mode)
data->DeviceMode.dmFields =
(DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT | DM_DISPLAYFREQUENCY |
DM_DISPLAYFLAGS);
data->ScaleX = 1.0f;
data->ScaleY = 1.0f;
/* Fill in the mode information */
mode->format = SDL_PIXELFORMAT_UNKNOWN;
@ -63,6 +65,13 @@ WIN_GetDisplayMode(LPCTSTR deviceName, DWORD index, SDL_DisplayMode * mode)
char bmi_data[sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD)];
LPBITMAPINFO bmi;
HBITMAP hbm;
int logical_width = GetDeviceCaps( hdc, HORZRES );
int logical_height = GetDeviceCaps( hdc, VERTRES );
data->ScaleX = (float)logical_width / devmode.dmPelsWidth;
data->ScaleY = (float)logical_height / devmode.dmPelsHeight;
mode->w = logical_width;
mode->h = logical_height;
SDL_zero(bmi_data);
bmi = (LPBITMAPINFO) bmi_data;
@ -93,7 +102,7 @@ WIN_GetDisplayMode(LPCTSTR deviceName, DWORD index, SDL_DisplayMode * mode)
} else if (bmi->bmiHeader.biBitCount == 4) {
mode->format = SDL_PIXELFORMAT_INDEX4LSB;
}
} else {
} else {
/* FIXME: Can we tell what this will be? */
if ((devmode.dmFields & DM_BITSPERPEL) == DM_BITSPERPEL) {
switch (devmode.dmBitsPerPel) {
@ -224,10 +233,10 @@ WIN_GetDisplayBounds(_THIS, SDL_VideoDisplay * display, SDL_Rect * rect)
{
SDL_DisplayModeData *data = (SDL_DisplayModeData *) display->current_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;
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;
}
@ -252,8 +261,7 @@ WIN_GetDisplayModes(_THIS, SDL_VideoDisplay * display)
if (!SDL_AddDisplayMode(display, &mode)) {
SDL_free(mode.driverdata);
}
}
else {
} else {
SDL_free(mode.driverdata);
}
}

2
src/video/windows/SDL_windowsmodes.h
View file

@ -31,6 +31,8 @@ typedef struct
typedef struct
{
DEVMODE DeviceMode;
float ScaleX;
float ScaleY;
} SDL_DisplayModeData;
extern int WIN_InitModes(_THIS);