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Viewport: Removed back-end renderer code that implied we need to clear with WindowBg color. Added NoRendererClear flag. (#1542, #1042)

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omar
2018-03-15 17:52:53 +01:00
parent 09d8943967
commit 8364d1ca6c
8 changed files with 35 additions and 22 deletions
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6
imgui.cpp
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@ -6053,6 +6053,10 @@ static void ImGui::UpdateWindowViewport(ImGuiWindow* window, bool window_pos_set
if (window->Flags & ImGuiWindowFlags_FullViewport)
{
// We currently have window fully covering a viewport and we disable WindowBg alpha, so clearing is not necessary
window->Viewport->Flags |= ImGuiViewportFlags_NoRendererClear;
// Position
SetWindowPos(window, window->Viewport->Pos, ImGuiCond_Always);
if (window->Viewport->PlatformRequestResize)
SetWindowSize(window, window->Viewport->Size, ImGuiCond_Always);
@ -6606,6 +6610,8 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
ImU32 bg_col = GetColorU32(GetWindowBgColorIdxFromFlags(flags));
if (g.NextWindowData.BgAlphaCond != 0)
bg_col = (bg_col & ~IM_COL32_A_MASK) | (IM_F32_TO_INT8_SAT(g.NextWindowData.BgAlphaVal) << IM_COL32_A_SHIFT);
if (window->Flags & ImGuiWindowFlags_FullViewport)
bg_col = (bg_col | IM_COL32_A_MASK);
window->DrawList->AddRectFilled(window->Pos+ImVec2(0,window->TitleBarHeight()), window->Pos+window->Size, bg_col, window_rounding, (flags & ImGuiWindowFlags_NoTitleBar) ? ImDrawCornerFlags_All : ImDrawCornerFlags_Bot);
// Title bar