Extracted a EndFrame() function out of Render() but kept it internal/private + clarified some asserts (#335)
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parent
0a1d6b6b74
commit
3b01b0a2f2
133
imgui.cpp
133
imgui.cpp
@ -2262,68 +2262,76 @@ static void PopClipRect()
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window->ClipRect = window->DrawList->_ClipRectStack.back();
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window->ClipRect = window->DrawList->_ClipRectStack.back();
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}
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}
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// This is normally called by Render(). You may want to call it directly if you want to avoid calling Render() but the gain will be very minimal.
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void ImGui::EndFrame()
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{
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ImGuiState& g = *GImGui;
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IM_ASSERT(g.Initialized); // Forgot to call ImGui::NewFrame()
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IM_ASSERT(g.FrameCountEnded != g.FrameCount); // ImGui::EndFrame() called multiple times, or forgot to call ImGui::NewFrame() again
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g.FrameCountEnded = g.FrameCount;
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// Hide implicit "Debug" window if it hasn't been used
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IM_ASSERT(g.CurrentWindowStack.Size == 1); // Mismatched Begin/End
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if (g.CurrentWindow && !g.CurrentWindow->Accessed)
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g.CurrentWindow->Active = false;
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ImGui::End();
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// Click to focus window and start moving (after we're done with all our widgets)
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if (!g.ActiveId)
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g.MovedWindow = NULL;
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if (g.ActiveId == 0 && g.HoveredId == 0 && g.IO.MouseClicked[0])
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{
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if (!(g.FocusedWindow && !g.FocusedWindow->WasActive && g.FocusedWindow->Active)) // Unless we just made a popup appear
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{
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if (g.HoveredRootWindow != NULL)
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{
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FocusWindow(g.HoveredWindow);
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if (!(g.HoveredWindow->Flags & ImGuiWindowFlags_NoMove))
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{
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g.MovedWindow = g.HoveredWindow;
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SetActiveID(g.HoveredRootWindow->MoveID, g.HoveredRootWindow);
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}
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}
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else if (g.FocusedWindow != NULL && GetFrontMostModalRootWindow() == NULL)
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{
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// Clicking on void disable focus
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FocusWindow(NULL);
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}
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}
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}
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// Sort the window list so that all child windows are after their parent
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// We cannot do that on FocusWindow() because childs may not exist yet
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g.WindowsSortBuffer.resize(0);
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g.WindowsSortBuffer.reserve(g.Windows.Size);
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for (int i = 0; i != g.Windows.Size; i++)
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{
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ImGuiWindow* window = g.Windows[i];
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if (window->Flags & ImGuiWindowFlags_ChildWindow) // if a child is active its parent will add it
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if (window->Active)
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continue;
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AddWindowToSortedBuffer(g.WindowsSortBuffer, window);
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}
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IM_ASSERT(g.Windows.Size == g.WindowsSortBuffer.Size); // we done something wrong
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g.Windows.swap(g.WindowsSortBuffer);
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// Clear Input data for next frame
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g.IO.MouseWheel = 0.0f;
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memset(g.IO.InputCharacters, 0, sizeof(g.IO.InputCharacters));
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}
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void ImGui::Render()
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void ImGui::Render()
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{
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{
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ImGuiState& g = *GImGui;
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ImGuiState& g = *GImGui;
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IM_ASSERT(g.Initialized); // Forgot to call ImGui::NewFrame()
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IM_ASSERT(g.Initialized); // Forgot to call ImGui::NewFrame()
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const bool first_render_of_the_frame = (g.FrameCountRendered != g.FrameCount);
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if (g.FrameCountEnded != g.FrameCount)
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ImGui::EndFrame();
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g.FrameCountRendered = g.FrameCount;
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g.FrameCountRendered = g.FrameCount;
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if (first_render_of_the_frame)
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{
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// Hide implicit "Debug" window if it hasn't been used
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IM_ASSERT(g.CurrentWindowStack.Size == 1); // Mismatched Begin/End
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if (g.CurrentWindow && !g.CurrentWindow->Accessed)
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g.CurrentWindow->Active = false;
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ImGui::End();
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// Click to focus window and start moving (after we're done with all our widgets)
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if (!g.ActiveId)
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g.MovedWindow = NULL;
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if (g.ActiveId == 0 && g.HoveredId == 0 && g.IO.MouseClicked[0])
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{
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if (!(g.FocusedWindow && !g.FocusedWindow->WasActive && g.FocusedWindow->Active)) // Unless we just made a popup appear
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{
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if (g.HoveredRootWindow != NULL)
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{
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FocusWindow(g.HoveredWindow);
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if (!(g.HoveredWindow->Flags & ImGuiWindowFlags_NoMove))
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{
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g.MovedWindow = g.HoveredWindow;
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SetActiveID(g.HoveredRootWindow->MoveID, g.HoveredRootWindow);
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}
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}
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else if (g.FocusedWindow != NULL && GetFrontMostModalRootWindow() == NULL)
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{
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// Clicking on void disable focus
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FocusWindow(NULL);
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}
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}
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}
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// Sort the window list so that all child windows are after their parent
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// We cannot do that on FocusWindow() because childs may not exist yet
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g.WindowsSortBuffer.resize(0);
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g.WindowsSortBuffer.reserve(g.Windows.Size);
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for (int i = 0; i != g.Windows.Size; i++)
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{
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ImGuiWindow* window = g.Windows[i];
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if (window->Flags & ImGuiWindowFlags_ChildWindow) // if a child is active its parent will add it
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if (window->Active)
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continue;
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AddWindowToSortedBuffer(g.WindowsSortBuffer, window);
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}
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IM_ASSERT(g.Windows.Size == g.WindowsSortBuffer.Size); // we done something wrong
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g.Windows.swap(g.WindowsSortBuffer);
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// Clear Input data for next frame
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g.IO.MouseWheel = 0.0f;
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memset(g.IO.InputCharacters, 0, sizeof(g.IO.InputCharacters));
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}
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// Skip render altogether if alpha is 0.0
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// Skip render altogether if alpha is 0.0
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// Note that vertex buffers have been created and are wasted, so it is best practice that you don't create windows in the first place, or respond to Begin() returning false.
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// Note that vertex buffers have been created and are wasted, so it is best practice that you don't create windows in the first place, or consistently respond to Begin() returning false.
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if (g.Style.Alpha > 0.0f)
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if (g.Style.Alpha > 0.0f)
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{
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{
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// Render tooltip
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// Render tooltip
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@ -2363,13 +2371,13 @@ void ImGui::Render()
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for (int i = 1; i < IM_ARRAYSIZE(g.RenderDrawLists); i++)
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for (int i = 1; i < IM_ARRAYSIZE(g.RenderDrawLists); i++)
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{
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{
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ImVector<ImDrawList*>& layer = g.RenderDrawLists[i];
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ImVector<ImDrawList*>& layer = g.RenderDrawLists[i];
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if (!layer.empty())
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if (layer.empty())
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{
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continue;
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memcpy(&g.RenderDrawLists[0][n], &layer[0], layer.Size * sizeof(ImDrawList*));
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memcpy(&g.RenderDrawLists[0][n], &layer[0], layer.Size * sizeof(ImDrawList*));
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n += layer.Size;
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n += layer.Size;
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}
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}
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}
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// Draw software mouse cursor if requested
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if (g.IO.MouseDrawCursor)
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if (g.IO.MouseDrawCursor)
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{
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{
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const ImGuiMouseCursorData& cursor_data = g.MouseCursorData[g.MouseCursor];
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const ImGuiMouseCursorData& cursor_data = g.MouseCursorData[g.MouseCursor];
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@ -2395,9 +2403,7 @@ void ImGui::Render()
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// Render. If user hasn't set a callback then they may retrieve the draw data via GetDrawData()
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// Render. If user hasn't set a callback then they may retrieve the draw data via GetDrawData()
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if (g.RenderDrawData.CmdListsCount > 0 && g.IO.RenderDrawListsFn != NULL)
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if (g.RenderDrawData.CmdListsCount > 0 && g.IO.RenderDrawListsFn != NULL)
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{
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g.IO.RenderDrawListsFn(&g.RenderDrawData);
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g.IO.RenderDrawListsFn(&g.RenderDrawData);
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}
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}
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}
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}
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}
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@ -3433,8 +3439,9 @@ bool ImGui::Begin(const char* name, bool* p_opened, const ImVec2& size_on_first_
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{
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{
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ImGuiState& g = *GImGui;
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ImGuiState& g = *GImGui;
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const ImGuiStyle& style = g.Style;
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const ImGuiStyle& style = g.Style;
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IM_ASSERT(name != NULL); // Window name required
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IM_ASSERT(g.Initialized); // Forgot to call ImGui::NewFrame()
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IM_ASSERT(g.Initialized); // Forgot to call ImGui::NewFrame()
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IM_ASSERT(name != NULL); // Must pass a name
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IM_ASSERT(g.FrameCountEnded != g.FrameCount); // Called ImGui::Render() or ImGui::EndFrame() and haven't called ImGui::NewFrame() again yet
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if (flags & ImGuiWindowFlags_NoInputs)
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if (flags & ImGuiWindowFlags_NoInputs)
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flags |= ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoResize;
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flags |= ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoResize;
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@ -331,6 +331,7 @@ struct ImGuiState
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float Time;
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float Time;
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int FrameCount;
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int FrameCount;
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int FrameCountEnded;
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int FrameCountRendered;
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int FrameCountRendered;
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ImVector<ImGuiWindow*> Windows;
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ImVector<ImGuiWindow*> Windows;
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ImVector<ImGuiWindow*> WindowsSortBuffer;
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ImVector<ImGuiWindow*> WindowsSortBuffer;
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@ -416,7 +417,7 @@ struct ImGuiState
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Time = 0.0f;
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Time = 0.0f;
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FrameCount = 0;
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FrameCount = 0;
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FrameCountRendered = -1;
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FrameCountEnded = FrameCountRendered = -1;
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CurrentWindow = NULL;
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CurrentWindow = NULL;
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FocusedWindow = NULL;
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FocusedWindow = NULL;
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HoveredWindow = NULL;
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HoveredWindow = NULL;
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@ -631,7 +632,11 @@ public:
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namespace ImGui
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namespace ImGui
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{
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{
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inline ImGuiWindow* GetCurrentWindowRead() { ImGuiState& g = *GImGui; return g.CurrentWindow; } // If this ever crash it means that ImGui::NewFrame() has never been called (which is illegal). We should always have a CurrentWindow in the stack (there is an implicit "Debug" window)
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// We should always have a CurrentWindow in the stack (there is an implicit "Debug" window)
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// If this ever crash because g.CurrentWindow is NULL it means that either
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// - ImGui::NewFrame() has never been called, which is illegal.
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// - You are calling ImGui functions after ImGui::Render() and before the next ImGui::NewFrame(), which is also illegal.
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inline ImGuiWindow* GetCurrentWindowRead() { ImGuiState& g = *GImGui; return g.CurrentWindow; }
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inline ImGuiWindow* GetCurrentWindow() { ImGuiState& g = *GImGui; g.CurrentWindow->Accessed = true; return g.CurrentWindow; }
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inline ImGuiWindow* GetCurrentWindow() { ImGuiState& g = *GImGui; g.CurrentWindow->Accessed = true; return g.CurrentWindow; }
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IMGUI_API ImGuiWindow* GetParentWindow();
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IMGUI_API ImGuiWindow* GetParentWindow();
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IMGUI_API void FocusWindow(ImGuiWindow* window);
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IMGUI_API void FocusWindow(ImGuiWindow* window);
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@ -639,6 +644,8 @@ namespace ImGui
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IMGUI_API void SetActiveID(ImGuiID id, ImGuiWindow* window);
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IMGUI_API void SetActiveID(ImGuiID id, ImGuiWindow* window);
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IMGUI_API void KeepAliveID(ImGuiID id);
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IMGUI_API void KeepAliveID(ImGuiID id);
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IMGUI_API void EndFrame(); // This automatically called by Render()
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IMGUI_API void ItemSize(const ImVec2& size, float text_offset_y = 0.0f);
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IMGUI_API void ItemSize(const ImVec2& size, float text_offset_y = 0.0f);
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IMGUI_API void ItemSize(const ImRect& bb, float text_offset_y = 0.0f);
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IMGUI_API void ItemSize(const ImRect& bb, float text_offset_y = 0.0f);
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IMGUI_API bool ItemAdd(const ImRect& bb, const ImGuiID* id);
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IMGUI_API bool ItemAdd(const ImRect& bb, const ImGuiID* id);
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