static Rectangle SDL_GetDisplayBounds(int displayIndex)
{
if (Check_Display_Index(displayIndex, out Exception e))
{
throw e;
}
SDL_VideoDisplay display = _video.displays[displayIndex];
if (_video.GetDisplayBounds != null)
{
return(_video.GetDisplayBounds(_video, display));
}
// Assume that the displays are left to right
Rectangle rect;
if (displayIndex == 0)
{
rect = Rectangle.Empty;
rect.X = 0;
rect.Y = 0;
}
else
{
rect = SDL_GetDisplayBounds(displayIndex - 1);
rect.X += rect.Width;// 默认多屏向右拓展？
}
rect.Width = display.current_mode.w;
rect.Height = display.current_mode.h;
return(rect);
}
static bool SDL_AddDisplayMode(SDL_VideoDisplay display, SDL_DisplayMode mode)
{
SDL_DisplayMode[] modes;
int i, nmodes;
// Make sure we don't already have the mode in the list
modes = display.display_modes;
nmodes = display.num_display_modes;
for (i = nmodes; CBool(i--);)
{
if (CompareMemory(mode, modes[i]) == 0)
{
return(false);
}
}
// Go ahead and add the new mode
if (nmodes == display.max_display_modes)
{
modes = Resize(display.display_modes, display.max_display_modes + 32);
display.display_modes = modes;
display.max_display_modes += 32;
}
modes[nmodes] = mode;
display.num_display_modes++;
// Re-sort video modes
Array.Sort(display.display_modes, 0, display.num_display_modes
, Comparer <SDL_DisplayMode> .Create(CompareModes));
return(true);
}
static void SDL_SetDisplayModeForDisplay(SDL_VideoDisplay display, SDL_DisplayMode mode)
{
SDL_DisplayMode display_mode;
SDL_DisplayMode current_mode;
if (mode != null)
{
display_mode = mode.DeepCopy();
// Default to the current mode
if (!CBool(display_mode.format))
{
display_mode.format = display.current_mode.format;
}
if (!CBool(display_mode.w))
{
display_mode.w = display.current_mode.w;
}
if (!CBool(display_mode.h))
{
display_mode.h = display.current_mode.h;
}
if (!CBool(display_mode.refresh_rate))
{
display_mode.refresh_rate = display.current_mode.refresh_rate;
}
// Get a good video mode, the closest one possible
if (SDL_GetClosestDisplayModeForDisplay(display
, display_mode
, display_mode) == null)
{
throw new NativeException("No video mode large enough for {0}x{1}"
, display_mode.w
, display_mode.h);
}
}
else
{
display_mode = display.desktop_mode;
}
// See if there's anything left to do
current_mode = display.current_mode;
if (CompareMemory(display_mode, current_mode) == 0)
{
return;
}
// Actually change the display mode
if (_video.SetDisplayMode == null)
{
throw new NativeException("Video driver doesn't support changing display mode");
}
_video.SetDisplayMode(_video, display, display_mode);
display.current_mode = display_mode;
}
static int SDL_GetNumDisplayModesForDisplay(SDL_VideoDisplay display)
{
if (!CBool(display.num_display_modes) && CBool(_video.GetDisplayModes))
{
_video.GetDisplayModes(_video, display);
Array.Sort(display.display_modes, 0, display.num_display_modes
, Comparer <SDL_DisplayMode> .Create(CompareModes));
}
return(display.num_display_modes);
}
static int SDL_AddVideoDisplay(SDL_VideoDisplay display)
{
SDL_VideoDisplay[] displays;
int index;
displays = Resize(_video.displays, _video.num_displays + 1);
index = _video.num_displays++;
displays[index] = display;
displays[index].device = _video;
_video.displays = displays;
if (display.name == null)
{
displays[index].name = index.ToString();
}
return(index);
}
static void SDL_UpdateFullscreenMode(SDL_Window window, bool fullscreen)
{
SDL_VideoDisplay display = SDL_GetDisplayForWindow(window);
SDL_Window other;
if (fullscreen)
{
// Hide any other fullscreen windows
if (display.fullscreen_window != null &&
display.fullscreen_window != window)
{
SDL_MinimizeWindow(window);
}
}
// See if anything needs to be done now
if ((display.fullscreen_window == window) == fullscreen)
{
return;
}
// See if there are any fullscreen windows
for (other = _video.windows; other != null; other = other.next)
{
bool setDisplayMode = false;
if (other == window)
{
setDisplayMode = fullscreen;
}
else if (Fullscreen_Visible(other) && SDL_GetDisplayForWindow(other) == display)
{
setDisplayMode = true;
}
if (setDisplayMode)
{
SDL_DisplayMode fullscreen_mode;
try
{
fullscreen_mode = SDL_GetWindowDisplayMode(other);
bool resized = true;
if (other.w == fullscreen_mode.w && other.h == fullscreen_mode.h)
{
resized = false;
}
// only do the mode change if we want exclusive fullscreen
if ((window.flags & SDL_WINDOW_FULLSCREEN_DESKTOP) != SDL_WINDOW_FULLSCREEN_DESKTOP)
{
SDL_SetDisplayModeForDisplay(display, fullscreen_mode);
}
else
{
SDL_SetDisplayModeForDisplay(display, null);
}
if (_video.SetWindowFullscreen != null)
{
_video.SetWindowFullscreen(_video, other, display, true);
}
}
catch (NativeException e)
{
IgnoreInDebugWriteLine(e);
}
}
}
}
static SDL_DisplayMode SDL_GetClosestDisplayModeForDisplay(
SDL_VideoDisplay display,
SDL_DisplayMode mode,
SDL_DisplayMode closest)
{
uint target_format;
int target_refresh_rate;
int i;
SDL_DisplayMode current, match;
if (CBool(mode) || CBool(closest))
{
throw new NativeException("Missing desired mode or closest mode parameter");
}
// Default to the desktop format
if (CBool(mode.format))
{
target_format = mode.format;
}
else
{
target_format = display.desktop_mode.format;
}
// Default to the desktop refresh rate
if (CBool(mode.refresh_rate))
{
target_refresh_rate = mode.refresh_rate;
}
else
{
target_refresh_rate = display.desktop_mode.refresh_rate;
}
match = null;
for (i = 0; i < SDL_GetNumDisplayModesForDisplay(display); ++i)
{
current = display.display_modes[i];
if (CBool(current.w) && (current.w < mode.w))
{
// Out of sorted modes large enough here
break;
}
if (CBool(current.h) && (current.h < mode.h))
{
if (CBool(current.w) && (current.w == mode.w))
{
// Out of sorted modes large enough here
break;
}
/*
* Wider, but not tall enough, due to a different
* aspect ratio. This mode must be skipped, but closer
* modes may still follow.
*/
continue;
}
if (match == null || current.w < match.w || current.h < match.h)
{
match = current;
continue;
}
if (current.format != match.format)
{
// Sorted highest depth to lowest
if (current.format == target_format ||
(SDL_BitsPerPixel(current.format) >= SDL_BitsPerPixel(target_format) &&
SDL_PixelType(current.format) == SDL_PixelType(target_format))
)
{
match = current;
}
continue;
}
if (current.refresh_rate != match.refresh_rate)
{
// Sorted highest refresh to lowest
if (current.refresh_rate >= target_refresh_rate)
{
match = current;
}
}
}
if (match != null)
{
if (CBool(match.format))
{
closest.format = match.format;
}
else
{
closest.format = mode.format;
}
if (CBool(match.w) && CBool(match.h))
{
closest.w = match.w;
closest.h = match.h;
}
else
{
closest.w = mode.w;
closest.h = mode.h;
}
if (CBool(match.refresh_rate))
{
closest.refresh_rate = match.refresh_rate;
}
else
{
closest.refresh_rate = mode.refresh_rate;
}
closest.driverdata = match.driverdata;
// Pick some reasonable defaults if the app and driver don't care
if (!CBool(closest.format))
{
closest.format = SDL_PIXELFORMAT_RGB888;
}
if (!CBool(closest.w))
{
closest.w = 640;
}
if (!CBool(closest.h))
{
closest.h = 480;
}
return(closest);
}
return(null);
}
static unsafe int SDL_GetWindowDisplayIndex(SDL_Window window)
{
int displayIndex;
int i, dist;
int closest = -1;
int closest_dist = 0x7FFFFFFF;
Point center = Point.Empty;
Point delta = Point.Empty;
Rectangle rect;
if (Check_Window_Magic(window, out Exception e))
{
throw e;
}
if (SDL_WindowPos_IsUndefined(window.x) ||
SDL_WindowPos_IsCentered(window.x))
{
displayIndex = window.x & 0xFFFF;
if (displayIndex >= _video.num_displays)
{
displayIndex = 0;
}
return(displayIndex);
}
if (SDL_WindowPos_IsUndefined(window.y) ||
SDL_WindowPos_IsCentered(window.y))
{
displayIndex = window.y & 0xFFFF;
if (displayIndex >= _video.num_displays)
{
displayIndex = 0;
}
return(displayIndex);
}
// Find the display containing the window
for (i = 0; i < _video.num_displays; ++i)
{
SDL_VideoDisplay display = _video.displays[i];
if (display.fullscreen_window == window)
{
return(i);
}
}
center.X = window.x + window.w / 2;
center.Y = window.y + window.h / 2;
for (i = 0; i < _video.num_displays; ++i)
{
rect = SDL_GetDisplayBounds(i);
if (SDL_EnclosePoints(¢er, 1, &rect, null))
{
return(i);
}
// 取两个中心点距离最小的那个
delta.X = center.X - (rect.X + rect.Width / 2);
delta.Y = center.Y - (rect.Y + rect.Width / 2);
dist = delta.X * delta.X + delta.Y * delta.Y;// 确保无负数
if (dist < closest_dist)
{
closest = i;
closest_dist = dist;
}
}
if (closest < 0)
{
throw new NativeException("Couldn't find any displays");
}
return(closest);
}