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Examples: Add Win32/Winapi + OpenGL example. (#3218, #5170 and #6086, #2772, #2600, #2359, #2022, #1553)

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Removed mulit-viewpot stuff in this commit on master, will be re-added separately.
This commit is contained in:
Mark Jansen
2020-05-09 15:03:10 +02:00
committed by ocornut
parent a338b78eb9
commit a566ecc58f
7 changed files with 520 additions and 43 deletions
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56
backends/imgui_impl_win32.cpp
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@ -114,7 +114,7 @@ static ImGui_ImplWin32_Data* ImGui_ImplWin32_GetBackendData()
}
// Functions
bool ImGui_ImplWin32_Init(void* hwnd)
static bool ImGui_ImplWin32_Init(void* hwnd, bool platformHasOwnDC)
{
ImGuiIO& io = ImGui::GetIO();
IM_ASSERT(io.BackendPlatformUserData == nullptr && "Already initialized a platform backend!");
@ -139,6 +139,7 @@ bool ImGui_ImplWin32_Init(void* hwnd)
// Set platform dependent data in viewport
ImGui::GetMainViewport()->PlatformHandleRaw = (void*)hwnd;
IM_UNUSED(platformHasOwnDC); // Used in 'docking' branch
// Dynamically load XInput library
#ifndef IMGUI_IMPL_WIN32_DISABLE_GAMEPAD
@ -164,6 +165,17 @@ bool ImGui_ImplWin32_Init(void* hwnd)
return true;
}
IMGUI_IMPL_API bool ImGui_ImplWin32_Init(void* hwnd)
{
return ImGui_ImplWin32_Init(hwnd, false);
}
IMGUI_IMPL_API bool ImGui_ImplWin32_InitForOpenGL(void* hwnd)
{
// OpenGL needs CS_OWNDC
return ImGui_ImplWin32_Init(hwnd, true);
}
void ImGui_ImplWin32_Shutdown()
{
ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData();
@ -804,45 +816,3 @@ float ImGui_ImplWin32_GetDpiScaleForHwnd(void* hwnd)
HMONITOR monitor = ::MonitorFromWindow((HWND)hwnd, MONITOR_DEFAULTTONEAREST);
return ImGui_ImplWin32_GetDpiScaleForMonitor(monitor);
}
//---------------------------------------------------------------------------------------------------------
// Transparency related helpers (optional)
//--------------------------------------------------------------------------------------------------------
#if defined(_MSC_VER)
#pragma comment(lib, "dwmapi") // Link with dwmapi.lib. MinGW will require linking with '-ldwmapi'
#endif
// [experimental]
// Borrowed from GLFW's function updateFramebufferTransparency() in src/win32_window.c
// (the Dwm* functions are Vista era functions but we are borrowing logic from GLFW)
void ImGui_ImplWin32_EnableAlphaCompositing(void* hwnd)
{
if (!_IsWindowsVistaOrGreater())
return;
BOOL composition;
if (FAILED(::DwmIsCompositionEnabled(&composition)) || !composition)
return;
BOOL opaque;
DWORD color;
if (_IsWindows8OrGreater() || (SUCCEEDED(::DwmGetColorizationColor(&color, &opaque)) && !opaque))
{
HRGN region = ::CreateRectRgn(0, 0, -1, -1);
DWM_BLURBEHIND bb = {};
bb.dwFlags = DWM_BB_ENABLE | DWM_BB_BLURREGION;
bb.hRgnBlur = region;
bb.fEnable = TRUE;
::DwmEnableBlurBehindWindow((HWND)hwnd, &bb);
::DeleteObject(region);
}
else
{
DWM_BLURBEHIND bb = {};
bb.dwFlags = DWM_BB_ENABLE;
::DwmEnableBlurBehindWindow((HWND)hwnd, &bb);
}
}
//---------------------------------------------------------------------------------------------------------

1
backends/imgui_impl_win32.h
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@ -17,6 +17,7 @@
#include "imgui.h" // IMGUI_IMPL_API
IMGUI_IMPL_API bool ImGui_ImplWin32_Init(void* hwnd);
IMGUI_IMPL_API bool ImGui_ImplWin32_InitForOpenGL(void* hwnd);
IMGUI_IMPL_API void ImGui_ImplWin32_Shutdown();
IMGUI_IMPL_API void ImGui_ImplWin32_NewFrame();