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# Conflicts:
#	imgui.cpp
#	imgui_internal.h
This commit is contained in:
omar 2017-10-27 15:53:59 +02:00
commit f10a1d7b9e
6 changed files with 57 additions and 44 deletions
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30
examples/README.txt
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@ -8,15 +8,16 @@ Third party languages and frameworks bindings: https://github.com/ocornut/imgui/
TL;DR;
- Newcomers, read 'PROGRAMMER GUIDE' in imgui.cpp for notes on how to setup ImGui in your codebase.
- To LEARN how the library is setup, you may refer to 'opengl2_example' because is the simplest one.
The other examples requires more boilerplate and are harder to read.
However, USE 'opengl3_example' in your application if you are using any modern OpenGL3+ calls.
Mixing old fixed pipeline OpenGL2 and programmable pipeline OpenGL3+ isn't well supported by some drivers.
If you are not sure, in doubt, use 'opengl3_example'.
- If you are using of the backend provided here, so you can copy the imgui_impl_xxx.cpp/h files
to your project and use them unmodified.
- If you have your own engine, you probably want to start from one of the OpenGL example and adapt it to
your engine, but you can read the other examples as well.
- To LEARN how the library is setup, you may refer to 'opengl2_example' because is the simplest one to read.
However, do NOT USE the 'opengl2_example' if your code is using any modern GL3+ calls.
Mixing old fixed-pipeline OpenGL2 and modern OpenGL3+ is going to make everything more complicated.
Read comments below for details. If you are not sure, in doubt, use 'opengl3_example'.
- If you have your own engine, you probably want to read a few of the examples first then adapt it to
your engine. Please note that if your engine is based on OpenGL/DirectX you can perfectly use the
existing rendering backends, don't feel forced to rewrite them with your own engine API, or you can
do that later when you already got things to work.
ImGui is highly portable and only requires a few things to run:
- Providing mouse/keyboard inputs
@ -45,12 +46,12 @@ Also note that some setup or GPU drivers may be causing extra lag (possibly by e
leaving you with no option but sadness/anger (Intel GPU drivers were reported as such).
opengl2_example/
*DO NOT USE THIS CODE IF YOUR CODE/ENGINE IS USING MODERN OPENGL*
GLFW + OpenGL example (old, fixed graphic pipeline).
This is only provided as a reference to learn how ImGui integration works, because it is easier to read.
However, if your code is using GL3+ context, using this may confuse your driver. Please use the GL3 example below.
(You might be able to use this code in a GL3/GL4 context but make sure you disable the programmable
pipeline by calling "glUseProgram(0)" before ImGui::Render. It appears that many librairies and drivers
are having issues mixing GL2 calls and newer GL3/GL4 calls. So it isn't recommended that you use that.)
This is mostly provided as a reference to learn how ImGui integration works, because it is easier to read.
If your code is using GL3+ context or any semi modern OpenGL calls, using this is likely to make everything
more complicated, will require your code to reset every single OpenGL attributes to their initial state,
and might confuse your GPU driver. Prefer using opengl3_example.
opengl3_example/
GLFW + OpenGL example (programmable pipeline, binding modern functions with GL3W).
@ -74,7 +75,12 @@ apple_example/
Synergy keyboard integration is rather hacky.
sdl_opengl2_example/
*DO NOT USE THIS CODE IF YOUR CODE/ENGINE IS USING MODERN OPENGL*
SDL2 + OpenGL example (old fixed pipeline).
This is mostly provided as a reference to learn how ImGui integration works, because it is easier to read.
If your code is using GL3+ context or any semi modern OpenGL calls, using this is likely to make everything
more complicated, will require your code to reset every single OpenGL attributes to their initial state,
and might confuse your GPU driver. Prefer using sdl_opengl3_example.
sdl_opengl3_example/
SDL2 + OpenGL3 example.

10
examples/opengl2_example/imgui_impl_glfw.cpp
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@ -1,10 +1,12 @@
// ImGui GLFW binding with OpenGL
// In this binding, ImTextureID is used to store an OpenGL 'GLuint' texture identifier. Read the FAQ about ImTextureID in imgui.cpp.
// If your context or own usage of OpenGL involve anything GL3/GL4, prefer using the code in opengl3_example.
// If you are not sure what that means, prefer using the code in opengl3_example.
// You *might* use this code with a GL3/GL4 context but make sure you disable the programmable pipeline by calling "glUseProgram(0)" before ImGui::Render().
// We cannot do that from GL2 code because the function doesn't exist. Mixing GL2 calls and GL3/GL4 calls is giving trouble to many librairies/drivers.
// *DO NOT USE THIS CODE IF YOUR CODE/ENGINE IS USING MODERN OPENGL*
// This is mostly provided as a reference to learn how ImGui integration works, because it is easier to read.
// If your code is using GL3+ context or any semi modern OpenGL calls, using this is likely to make everything
// more complicated, will require your code to reset every single OpenGL attributes to their initial state,
// and might confuse your GPU driver. Prefer using opengl3_example.
// The GL2 code is unable to reset attributes or even call e.g. "glUseProgram(0)" because they don't exist in that API.
// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
// If you use this binding you'll need to call 4 functions: ImGui_ImplXXXX_Init(), ImGui_ImplXXXX_NewFrame(), ImGui::Render() and ImGui_ImplXXXX_Shutdown().

8
examples/sdl_opengl2_example/imgui_impl_sdl.cpp
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@ -1,8 +1,12 @@
// ImGui SDL2 binding with OpenGL
// In this binding, ImTextureID is used to store an OpenGL 'GLuint' texture identifier. Read the FAQ about ImTextureID in imgui.cpp.
// If your context or own usage of OpenGL involve anything GL3/GL4, prefer using the code in sdl_opengl3_example.
// If you are not sure what that means, prefer using the code in sdl_opengl3_example.
// *DO NOT USE THIS CODE IF YOUR CODE/ENGINE IS USING MODERN OPENGL*
// This is mostly provided as a reference to learn how ImGui integration works, because it is easier to read.
// If your code is using GL3+ context or any semi modern OpenGL calls, using this is likely to make everything
// more complicated, will require your code to reset every single OpenGL attributes to their initial state,
// and might confuse your GPU driver. Prefer using sdl_opengl3_example.
// The GL2 code is unable to reset attributes or even call e.g. "glUseProgram(0)" because they don't exist in that API.
// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
// If you use this binding you'll need to call 4 functions: ImGui_ImplXXXX_Init(), ImGui_ImplXXXX_NewFrame(), ImGui::Render() and ImGui_ImplXXXX_Shutdown().

34
imgui.cpp
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@ -3129,29 +3129,29 @@ void ImGui::NewFrame()
g.IO.Framerate = 1.0f / (g.FramerateSecPerFrameAccum / (float)IM_ARRAYSIZE(g.FramerateSecPerFrame));
// Handle user moving window with mouse (at the beginning of the frame to avoid input lag or sheering). Only valid for root windows.
if (g.MovedWindowMoveId && g.MovedWindowMoveId == g.ActiveId && g.ActiveIdSource == ImGuiInputSource_Mouse)
if (g.MovingWindowMoveId && g.MovingWindowMoveId == g.ActiveId && g.ActiveIdSource == ImGuiInputSource_Mouse)
{
KeepAliveID(g.MovedWindowMoveId);
IM_ASSERT(g.MovedWindow && g.MovedWindow->RootWindow);
IM_ASSERT(g.MovedWindow->MoveId == g.MovedWindowMoveId);
KeepAliveID(g.MovingWindowMoveId);
IM_ASSERT(g.MovingWindow && g.MovingWindow->RootWindow);
IM_ASSERT(g.MovingWindow->MoveId == g.MovingWindowMoveId);
if (g.IO.MouseDown[0])
{
g.MovedWindow->RootWindow->PosFloat += g.IO.MouseDelta;
g.MovingWindow->RootWindow->PosFloat += g.IO.MouseDelta;
if (g.IO.MouseDelta.x != 0.0f || g.IO.MouseDelta.y != 0.0f)
MarkIniSettingsDirty(g.MovedWindow->RootWindow);
FocusWindow(g.MovedWindow);
MarkIniSettingsDirty(g.MovingWindow->RootWindow);
FocusWindow(g.MovingWindow);
}
else
{
ClearActiveID();
g.MovedWindow = NULL;
g.MovedWindowMoveId = 0;
g.MovingWindow = NULL;
g.MovingWindowMoveId = 0;
}
}
else
{
g.MovedWindow = NULL;
g.MovedWindowMoveId = 0;
g.MovingWindow = NULL;
g.MovingWindowMoveId = 0;
}
// Delay saving settings so we don't spam disk too much
@ -3163,11 +3163,11 @@ void ImGui::NewFrame()
}
// Find the window we are hovering. Child windows can extend beyond the limit of their parent so we need to derive HoveredRootWindow from HoveredWindow
g.HoveredWindow = g.MovedWindow ? g.MovedWindow : FindHoveredWindow(g.IO.MousePos, false);
g.HoveredWindow = g.MovingWindow ? g.MovingWindow : FindHoveredWindow(g.IO.MousePos, false);
if (g.HoveredWindow && (g.HoveredWindow->Flags & ImGuiWindowFlags_ChildWindow))
g.HoveredRootWindow = g.HoveredWindow->RootWindow;
else
g.HoveredRootWindow = g.MovedWindow ? g.MovedWindow->RootWindow : FindHoveredWindow(g.IO.MousePos, true);
g.HoveredRootWindow = g.MovingWindow ? g.MovingWindow->RootWindow : FindHoveredWindow(g.IO.MousePos, true);
if (ImGuiWindow* modal_window = GetFrontMostModalRootWindow())
{
@ -3311,7 +3311,7 @@ void ImGui::Shutdown()
g.HoveredWindow = NULL;
g.HoveredRootWindow = NULL;
g.ActiveIdWindow = NULL;
g.MovedWindow = NULL;
g.MovingWindow = NULL;
for (int i = 0; i < g.Settings.Size; i++)
ImGui::MemFree(g.Settings[i].Name);
g.Settings.clear();
@ -3614,9 +3614,9 @@ void ImGui::EndFrame()
*/
if (!(g.HoveredWindow->Flags & ImGuiWindowFlags_NoMove) && !(g.HoveredRootWindow->Flags & ImGuiWindowFlags_NoMove))
{
g.MovedWindow = g.HoveredWindow;
g.MovedWindowMoveId = g.HoveredWindow->MoveId;
SetActiveID(g.MovedWindowMoveId, g.HoveredRootWindow);
g.MovingWindow = g.HoveredWindow;
g.MovingWindowMoveId = g.MovingWindow->MoveId;
SetActiveID(g.MovingWindowMoveId, g.HoveredRootWindow);
}
}
else if (g.NavWindow != NULL && GetFrontMostModalRootWindow() == NULL)

2
imgui.h
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@ -30,6 +30,7 @@
#define IM_ASSERT(_EXPR) assert(_EXPR)
#endif
// Helpers
// Some compilers support applying printf-style warnings to user functions.
#if defined(__clang__) || defined(__GNUC__)
#define IM_FMTARGS(FMT) __attribute__((format(printf, FMT, FMT+1)))
@ -38,6 +39,7 @@
#define IM_FMTARGS(FMT)
#define IM_FMTLIST(FMT)
#endif
#define IM_ARRAYSIZE(_ARR) ((int)(sizeof(_ARR)/sizeof(*_ARR)))
#if defined(__clang__)
#pragma clang diagnostic push

9
imgui_internal.h
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@ -81,7 +81,6 @@ extern IMGUI_API ImGuiContext* GImGui; // Current implicit ImGui context pointe
// Helpers
//-----------------------------------------------------------------------------
#define IM_ARRAYSIZE(_ARR) ((int)(sizeof(_ARR)/sizeof(*_ARR)))
#define IM_PI 3.14159265358979323846f
#define IM_OFFSETOF(_TYPE,_ELM) ((size_t)&(((_TYPE*)0)->_ELM))
@ -457,8 +456,8 @@ struct ImGuiContext
ImVec2 ActiveIdClickOffset; // Clicked offset from upper-left corner, if applicable (currently only set by ButtonBehavior)
ImGuiWindow* ActiveIdWindow;
ImGuiInputSource ActiveIdSource; // Activating with mouse or nav (gamepad/keyboard)
ImGuiWindow* MovedWindow; // Track the child window we clicked on to move a window (only apply to moving with mouse)
ImGuiID MovedWindowMoveId; // == MovedWindow->RootWindow->MoveId
ImGuiWindow* MovingWindow; // Track the child window we clicked on to move a window.
ImGuiID MovingWindowMoveId; // == MovingWindow->MoveId
ImVector<ImGuiIniData> Settings; // .ini Settings
float SettingsDirtyTimer; // Save .ini Settings on disk when time reaches zero
ImVector<ImGuiColMod> ColorModifiers; // Stack for PushStyleColor()/PopStyleColor()
@ -586,8 +585,8 @@ struct ImGuiContext
ActiveIdClickOffset = ImVec2(-1,-1);
ActiveIdWindow = NULL;
ActiveIdSource = ImGuiInputSource_None;
MovedWindow = NULL;
MovedWindowMoveId = 0;
MovingWindow = NULL;
MovingWindowMoveId = 0;
SettingsDirtyTimer = 0.0f;
NavWindow = NULL;