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Render: Removed the code that disable render if style.Alpha is 0.0f, it is both incorrect (as style Alpha can be modified mid-frame), not really necessary (just tested that full Alpha = 0 will lead to empty draw lists!) and misleading (bulk of the work was already done).

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This commit is contained in:
omar 2018-03-05 22:47:53 +01:00
parent 945f4d1ecd
commit cea7492bab
1 changed files with 39 additions and 44 deletions
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83
imgui.cpp
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@ -4028,52 +4028,47 @@ void ImGui::Render()
ImGui::EndFrame();
g.FrameCountRendered = g.FrameCount;
// Skip render altogether if alpha is 0.0
// 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.
if (g.Style.Alpha > 0.0f)
// Gather windows to render
g.IO.MetricsRenderVertices = g.IO.MetricsRenderIndices = g.IO.MetricsActiveWindows = 0;
g.DrawDataBuilder.Clear();
ImGuiWindow* window_to_render_front_most = (g.NavWindowingTarget && !(g.NavWindowingTarget->Flags & ImGuiWindowFlags_NoBringToFrontOnFocus)) ? g.NavWindowingTarget : NULL;
for (int n = 0; n != g.Windows.Size; n++)
{
// Gather windows to render
g.IO.MetricsRenderVertices = g.IO.MetricsRenderIndices = g.IO.MetricsActiveWindows = 0;
g.DrawDataBuilder.Clear();
ImGuiWindow* window_to_render_front_most = (g.NavWindowingTarget && !(g.NavWindowingTarget->Flags & ImGuiWindowFlags_NoBringToFrontOnFocus)) ? g.NavWindowingTarget : NULL;
for (int n = 0; n != g.Windows.Size; n++)
{
ImGuiWindow* window = g.Windows[n];
if (window->Active && window->HiddenFrames <= 0 && (window->Flags & (ImGuiWindowFlags_ChildWindow)) == 0 && window != window_to_render_front_most)
AddWindowToDrawDataSelectLayer(window);
}
if (window_to_render_front_most && window_to_render_front_most->Active && window_to_render_front_most->HiddenFrames <= 0) // NavWindowingTarget is always temporarily displayed as the front-most window
AddWindowToDrawDataSelectLayer(window_to_render_front_most);
g.DrawDataBuilder.FlattenIntoSingleLayer();
// Draw software mouse cursor if requested
ImVec2 offset, size, uv[4];
if (g.IO.MouseDrawCursor && g.IO.Fonts->GetMouseCursorTexData(g.MouseCursor, &offset, &size, &uv[0], &uv[2]))
{
const ImVec2 pos = g.IO.MousePos - offset;
const ImTextureID tex_id = g.IO.Fonts->TexID;
const float sc = g.Style.MouseCursorScale;
g.OverlayDrawList.PushTextureID(tex_id);
g.OverlayDrawList.AddImage(tex_id, pos + ImVec2(1,0)*sc, pos+ImVec2(1,0)*sc + size*sc, uv[2], uv[3], IM_COL32(0,0,0,48)); // Shadow
g.OverlayDrawList.AddImage(tex_id, pos + ImVec2(2,0)*sc, pos+ImVec2(2,0)*sc + size*sc, uv[2], uv[3], IM_COL32(0,0,0,48)); // Shadow
g.OverlayDrawList.AddImage(tex_id, pos, pos + size*sc, uv[2], uv[3], IM_COL32(0,0,0,255)); // Black border
g.OverlayDrawList.AddImage(tex_id, pos, pos + size*sc, uv[0], uv[1], IM_COL32(255,255,255,255)); // White fill
g.OverlayDrawList.PopTextureID();
}
if (!g.OverlayDrawList.VtxBuffer.empty())
AddDrawListToDrawData(&g.DrawDataBuilder.Layers[0], &g.OverlayDrawList);
// Setup ImDrawData structure for end-user
SetupDrawData(&g.DrawDataBuilder.Layers[0], &g.DrawData);
g.IO.MetricsRenderVertices = g.DrawData.TotalVtxCount;
g.IO.MetricsRenderIndices = g.DrawData.TotalIdxCount;
// Render. If user hasn't set a callback then they may retrieve the draw data via GetDrawData()
#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
if (g.DrawData.CmdListsCount > 0 && g.IO.RenderDrawListsFn != NULL)
g.IO.RenderDrawListsFn(&g.DrawData);
#endif
ImGuiWindow* window = g.Windows[n];
if (window->Active && window->HiddenFrames <= 0 && (window->Flags & ImGuiWindowFlags_ChildWindow) == 0 && window != window_to_render_front_most)
AddWindowToDrawDataSelectLayer(window);
}
if (window_to_render_front_most && window_to_render_front_most->Active && window_to_render_front_most->HiddenFrames <= 0) // NavWindowingTarget is always temporarily displayed as the front-most window
AddWindowToDrawDataSelectLayer(window_to_render_front_most);
g.DrawDataBuilder.FlattenIntoSingleLayer();
// Draw software mouse cursor if requested
ImVec2 offset, size, uv[4];
if (g.IO.MouseDrawCursor && g.IO.Fonts->GetMouseCursorTexData(g.MouseCursor, &offset, &size, &uv[0], &uv[2]))
{
const ImVec2 pos = g.IO.MousePos - offset;
const ImTextureID tex_id = g.IO.Fonts->TexID;
const float sc = g.Style.MouseCursorScale;
g.OverlayDrawList.PushTextureID(tex_id);
g.OverlayDrawList.AddImage(tex_id, pos + ImVec2(1,0)*sc, pos+ImVec2(1,0)*sc + size*sc, uv[2], uv[3], IM_COL32(0,0,0,48)); // Shadow
g.OverlayDrawList.AddImage(tex_id, pos + ImVec2(2,0)*sc, pos+ImVec2(2,0)*sc + size*sc, uv[2], uv[3], IM_COL32(0,0,0,48)); // Shadow
g.OverlayDrawList.AddImage(tex_id, pos, pos + size*sc, uv[2], uv[3], IM_COL32(0,0,0,255)); // Black border
g.OverlayDrawList.AddImage(tex_id, pos, pos + size*sc, uv[0], uv[1], IM_COL32(255,255,255,255)); // White fill
g.OverlayDrawList.PopTextureID();
}
if (!g.OverlayDrawList.VtxBuffer.empty())
AddDrawListToDrawData(&g.DrawDataBuilder.Layers[0], &g.OverlayDrawList);
// Setup ImDrawData structure for end-user
SetupDrawData(&g.DrawDataBuilder.Layers[0], &g.DrawData);
g.IO.MetricsRenderVertices = g.DrawData.TotalVtxCount;
g.IO.MetricsRenderIndices = g.DrawData.TotalIdxCount;
// Render. If user hasn't set a callback then they may retrieve the draw data via GetDrawData()
#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
if (g.DrawData.CmdListsCount > 0 && g.IO.RenderDrawListsFn != NULL)
g.IO.RenderDrawListsFn(&g.DrawData);
#endif
}
const char* ImGui::FindRenderedTextEnd(const char* text, const char* text_end)