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Viewport, Platform, DPI: Back-end store per-monitor DPI information in ImGuiPlatformMonitor. (#1542, #1676)

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omar
2018-04-13 18:07:23 +02:00
parent f270d6c52c
commit 950539b768
5 changed files with 29 additions and 17 deletions
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17
examples/imgui_impl_sdl2.cpp
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@ -32,10 +32,11 @@
// SDL
#include <SDL.h>
#include <SDL_syswm.h>
#define SDL_HAS_CAPTURE_MOUSE SDL_VERSION_ATLEAST(2,0,4)
#define SDL_HAS_WINDOW_OPACITY SDL_VERSION_ATLEAST(2,0,5)
#define SDL_HAS_ALWAYS_ON_TOP SDL_VERSION_ATLEAST(2,0,5)
#define SDL_HAS_VULKAN SDL_VERSION_ATLEAST(2,0,6)
#define SDL_HAS_CAPTURE_MOUSE SDL_VERSION_ATLEAST(2,0,4)
#define SDL_HAS_WINDOW_OPACITY SDL_VERSION_ATLEAST(2,0,5)
#define SDL_HAS_ALWAYS_ON_TOP SDL_VERSION_ATLEAST(2,0,5)
#define SDL_HAS_PER_MONITOR_DPI SDL_VERSION_ATLEAST(2,0,4)
#define SDL_HAS_VULKAN SDL_VERSION_ATLEAST(2,0,6)
#if !SDL_HAS_VULKAN
static const Uint32 SDL_WINDOW_VULKAN = 0x10000000;
#endif
@ -446,13 +447,19 @@ static void ImGui_ImplSDL2_UpdateMonitors()
{
ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
int display_count = SDL_GetNumVideoDisplays();
platform_io.Monitors.resize(display_count);
platform_io.Monitors.resize(display_count, ImGuiPlatformMonitor());
for (int n = 0; n < display_count; n++)
{
// Warning: the validity of monitor DPI information on Windows depends on the application DPI awareness settings, which generally needs to be set in the manifest or at runtime.
SDL_Rect r;
SDL_GetDisplayBounds(n, &r);
platform_io.Monitors[n].Pos = ImVec2((float)r.x, (float)r.y);
platform_io.Monitors[n].Size = ImVec2((float)r.w, (float)r.h);
#if SDL_HAS_PER_MONITOR_DPI
float dpi = 0.0f;
SDL_GetDisplayDPI(n, &dpi, NULL, NULL);
platform_io.Monitors[n].DpiScale = dpi / 96.0f;
#endif
}
}