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Viewport: Avoid unnecessary reapplying platform pos/size every frame. (#2205) + Fix GLFW ImGui_ImplGlfw_CreateWindow() from not applying position immediately. Clear LastNameHash properly (bug already fixed in Docking branch)

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This commit is contained in:
omar 2018-11-23 15:50:33 +01:00
parent cae4d020dc
commit 862781b195
3 changed files with 15 additions and 9 deletions
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1
examples/imgui_impl_glfw.cpp
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@ -409,6 +409,7 @@ static void ImGui_ImplGlfw_CreateWindow(ImGuiViewport* viewport)
data->Window = glfwCreateWindow((int)viewport->Size.x, (int)viewport->Size.y, "No Title Yet", NULL, share_window);
data->WindowOwned = true;
viewport->PlatformHandle = (void*)data->Window;
glfwSetWindowPos(data->Window, (int)viewport->Pos.x, (int)viewport->Pos.y);
// Install callbacks for secondary viewports
glfwSetMouseButtonCallback(data->Window, ImGui_ImplGlfw_MouseButtonCallback);

17
imgui.cpp
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@ -7280,9 +7280,9 @@ static void ImGui::UpdateViewports()
// Apply Position and Size (from Platform Window to ImGui) if requested.
// We do it early in the frame instead of waiting for UpdatePlatformWindows() to avoid a frame of lag when moving/resizing using OS facilities.
if (viewport->PlatformRequestMove)
viewport->Pos = g.PlatformIO.Platform_GetWindowPos(viewport);
viewport->Pos = viewport->LastPlatformPos = g.PlatformIO.Platform_GetWindowPos(viewport);
if (viewport->PlatformRequestResize)
viewport->Size = g.PlatformIO.Platform_GetWindowSize(viewport);
viewport->Size = viewport->LastPlatformSize = g.PlatformIO.Platform_GetWindowSize(viewport);
// Translate imgui windows when a Host Viewport has been moved
ImVec2 delta = viewport->Pos - viewport->LastPos;
@ -7576,18 +7576,21 @@ void ImGui::UpdatePlatformWindows()
g.PlatformIO.Platform_CreateWindow(viewport);
if (g.PlatformIO.Renderer_CreateWindow != NULL)
g.PlatformIO.Renderer_CreateWindow(viewport);
viewport->RendererLastSize = viewport->Size;
viewport->LastNameHash = 0;
viewport->LastPlatformPos = viewport->LastPlatformSize = ImVec2(FLT_MAX, FLT_MAX); // By clearing those we'll enforce a call to Platform_SetWindowPos/Platform_SetWindowSize before Platform_ShowWindow
viewport->LastRendererSize = viewport->Size;
viewport->CreatedPlatformWindow = true;
}
// Apply Position and Size (from ImGui to Platform/Renderer back-ends)
if (!viewport->PlatformRequestMove)
if ((viewport->LastPlatformPos.x != viewport->Pos.x || viewport->LastPlatformPos.y != viewport->Pos.y) && !viewport->PlatformRequestMove)
g.PlatformIO.Platform_SetWindowPos(viewport, viewport->Pos);
if (!viewport->PlatformRequestResize)
if ((viewport->LastPlatformSize.x != viewport->Size.x || viewport->LastPlatformSize.y != viewport->Size.y) && !viewport->PlatformRequestResize)
g.PlatformIO.Platform_SetWindowSize(viewport, viewport->Size);
if (g.PlatformIO.Renderer_SetWindowSize && (viewport->RendererLastSize.x != viewport->Size.x || viewport->RendererLastSize.y != viewport->Size.y))
if ((viewport->LastRendererSize.x != viewport->Size.x || viewport->LastRendererSize.y != viewport->Size.y) && g.PlatformIO.Renderer_SetWindowSize)
g.PlatformIO.Renderer_SetWindowSize(viewport, viewport->Size);
viewport->RendererLastSize = viewport->Size;
viewport->LastPlatformPos = viewport->Pos;
viewport->LastPlatformSize = viewport->LastRendererSize = viewport->Size;
// Update title bar (if it changed)
if (ImGuiWindow* window_for_title = viewport->Window)

6
imgui_internal.h
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@ -611,9 +611,11 @@ struct ImGuiViewportP : public ImGuiViewport
ImDrawList* OverlayDrawList; // For convenience, a draw list we can render to that's always rendered last (we use it to draw software mouse cursor when io.MouseDrawCursor is set)
ImDrawData DrawDataP;
ImDrawDataBuilder DrawDataBuilder;
ImVec2 RendererLastSize;
ImVec2 LastPlatformPos;
ImVec2 LastPlatformSize;
ImVec2 LastRendererSize;
ImGuiViewportP() { Idx = -1; LastFrameActive = LastFrameOverlayDrawList = LastFrontMostStampCount = -1; LastNameHash = 0; CreatedPlatformWindow = false; Alpha = LastAlpha = 1.0f; PlatformMonitor = INT_MIN; Window = NULL; OverlayDrawList = NULL; RendererLastSize = ImVec2(-1.0f,-1.0f); }
ImGuiViewportP() { Idx = -1; LastFrameActive = LastFrameOverlayDrawList = LastFrontMostStampCount = -1; LastNameHash = 0; CreatedPlatformWindow = false; Alpha = LastAlpha = 1.0f; PlatformMonitor = INT_MIN; Window = NULL; OverlayDrawList = NULL; LastPlatformPos = LastPlatformSize = LastRendererSize = ImVec2(FLT_MAX, FLT_MAX); }
~ImGuiViewportP() { if (OverlayDrawList) IM_DELETE(OverlayDrawList); }
ImRect GetRect() const { return ImRect(Pos.x, Pos.y, Pos.x + Size.x, Pos.y + Size.y); }
ImVec2 GetCenter() const{ return ImVec2(Pos.x + Size.x * 0.5f, Pos.y + Size.y * 0.5f); }