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Backends: GLFW: added ImGui_ImplGlfw_GetContentScaleForMonitor(), ImGui_ImplGlfw_GetContentScaleForWindow() helpers.

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# Conflicts:
#	backends/imgui_impl_glfw.cpp
This commit is contained in:
ocornut
2025-06-06 16:14:22 +02:00
parent 9da3e6696a
commit 8269924c33
2 changed files with 31 additions and 0 deletions
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28
backends/imgui_impl_glfw.cpp
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@@ -28,6 +28,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2025-06-11: Added ImGui_ImplGlfw_GetContentScaleForWindow(GLFWwindow* window) and ImGui_ImplGlfw_GetContentScaleForMonitor(GLFWmonitor* monitor) helper to facilitate making DPI-aware apps.
// 2025-03-10: Map GLFW_KEY_WORLD_1 and GLFW_KEY_WORLD_2 into ImGuiKey_Oem102.
// 2025-03-03: Fixed clipboard handler assertion when using GLFW <= 3.2.1 compiled with asserts enabled.
// 2024-08-22: Moved some OS/backend related function pointers from ImGuiIO to ImGuiPlatformIO:
@@ -840,6 +841,33 @@ static void ImGui_ImplGlfw_UpdateGamepads()
#undef MAP_ANALOG
}
// - On Windows the process needs to be marked DPI-aware!! SDL2 doesn't do it by default. You can call ::SetProcessDPIAware() or call ImGui_ImplWin32_EnableDpiAwareness() from Win32 backend.
// - Apple platforms use FramebufferScale so we always return 1.0f.
// - Some accessibility applications are declaring virtual monitors with a DPI of 0.0f, see #7902. We preserve this value for caller to handle.
float ImGui_ImplGlfw_GetContentScaleForWindow(GLFWwindow* window)
{
#if GLFW_HAS_PER_MONITOR_DPI && !defined(__APPLE__)
float x_scale, y_scale;
glfwGetWindowContentScale(window, &x_scale, &y_scale);
return x_scale;
#else
IM_UNUSED(window);
return 1.0f;
#endif
}
float ImGui_ImplGlfw_GetContentScaleForMonitor(GLFWmonitor* monitor)
{
#if GLFW_HAS_PER_MONITOR_DPI && !defined(__APPLE__)
float x_scale, y_scale;
glfwGetMonitorContentScale(monitor, &x_scale, &y_scale);
return x_scale;
#else
IM_UNUSED(monitor);
return 1.0f;
#endif
}
void ImGui_ImplGlfw_NewFrame()
{
ImGuiIO& io = ImGui::GetIO();

3
backends/imgui_impl_glfw.h
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@@ -62,5 +62,8 @@ IMGUI_IMPL_API void ImGui_ImplGlfw_MonitorCallback(GLFWmonitor* monitor, int
// GLFW helpers
IMGUI_IMPL_API void ImGui_ImplGlfw_Sleep(int milliseconds);
IMGUI_IMPL_API float ImGui_ImplGlfw_GetContentScaleForWindow(GLFWwindow* window);
IMGUI_IMPL_API float ImGui_ImplGlfw_GetContentScaleForMonitor(GLFWmonitor* monitor);
#endif // #ifndef IMGUI_DISABLE