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fix DPI detection on SDL backend

This commit is contained in:
Vadim Lopatin 2017-08-29 15:27:52 +03:00
parent 5e47ce1ca6
commit fdd5ff11cd
1 changed files with 33 additions and 4 deletions
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37
src/dlangui/platforms/sdl/sdlapp.d
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@ -64,7 +64,7 @@ private derelict.util.exception.ShouldThrow missingSymFunc( string symName ) {
"SDL_RemoveTimer", "SDL_RemoveTimer", "SDL_PushEvent",
"SDL_RegisterEvents", "SDL_WaitEvent", "SDL_StartTextInput",
"SDL_Quit", "SDL_HasClipboardText", "SDL_GetClipboardText",
"SDL_free", "SDL_SetClipboardText", "SDL_Init"]) {
"SDL_free", "SDL_SetClipboardText", "SDL_Init", "SDL_GetNumVideoDisplays"]) {//"SDL_GetDisplayDPI"
if (symName.equal(s)) // Symbol is used
return derelict.util.exception.ShouldThrow.Yes;
}
@ -1198,7 +1198,7 @@ class SDLPlatform : Platform {
}
SDLWindow res = new SDLWindow(this, windowCaption, parent, flags, newwidth, newheight);
_windowMap[res.windowId] = res;
if (oldDPI != SCREEN_DPI) {
if (sdlUpdateScreenDpi() || oldDPI != SCREEN_DPI) {
version(Windows) {
newwidth = pointsToPixels(width);
newheight = pointsToPixels(height);
@ -1499,6 +1499,8 @@ version (Windows) {
SCREEN_DPI = GetDeviceCaps(dc, LOGPIXELSY);
DeleteObject(dc);
Log.i("Win32 API SCREEN_DPI detected as ", SCREEN_DPI);
//SCREEN_DPI = 96 * 3 / 2;
result = myWinMain(hInstance, hPrevInstance, lpCmdLine, nCmdShow);
@ -1564,6 +1566,30 @@ version (Windows) {
}
}
/// try to get screen resolution and update SCREEN_DPI; returns true if SCREEN_DPI is changed by this check
bool sdlUpdateScreenDpi(int displayIndex = 0) {
if (SDL_GetDisplayDPI is null) {
Log.w("SDL_GetDisplayDPI is not found: cannot detect screen DPI");
return false;
}
int numDisplays = SDL_GetNumVideoDisplays();
if (numDisplays < displayIndex + 1)
return false;
float hdpi = 0;
if (SDL_GetDisplayDPI(0, null, &hdpi, null))
return false;
int idpi = cast(int)hdpi;
if (idpi < 32 || idpi > 2000)
return false;
Log.i("sdlUpdateScreenDpi: SCREEN_DPI=", idpi);
if (SCREEN_DPI != idpi) {
Log.i("sdlUpdateScreenDpi: SCREEN_DPI is changed from ", SCREEN_DPI, " to ", idpi);
SCREEN_DPI = idpi;
return true;
}
return false;
}
int sdlmain(string[] args) {
initLogs();
@ -1583,8 +1609,6 @@ int sdlmain(string[] args) {
DOUBLE_CLICK_THRESHOLD_MS = GetDoubleClickTime();
}
currentTheme = createDefaultTheme();
try {
DerelictSDL2.missingSymbolCallback = &missingSymFunc;
// Load the SDL 2 library.
@ -1630,6 +1654,11 @@ int sdlmain(string[] args) {
auto sdl = new SDLPlatform;
Platform.setInstance(sdl);
currentTheme = createDefaultTheme();
sdlUpdateScreenDpi(0);
Platform.instance.uiTheme = "theme_default";
int res = 0;