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Fonts: Made it possible to use PushFont()/PopFont() calls accross Begin() calls. (#3224, #3875, #6398, #7903)

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ocornut 2024-08-20 15:34:14 +02:00
parent ecb1962013
commit eb7201b902
4 changed files with 27 additions and 7 deletions
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21
imgui.cpp
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@ -5068,6 +5068,8 @@ static void InitViewportDrawData(ImGuiViewportP* viewport)
// - If the code here changes, may need to update code of functions like NextColumn() and PushColumnClipRect():
// some frequently called functions which to modify both channels and clipping simultaneously tend to use the
// more specialized SetWindowClipRectBeforeSetChannel() to avoid extraneous updates of underlying ImDrawCmds.
// - This is analoguous to PushFont()/PopFont() in the sense that are a mixing a global stack and a window stack,
// which in the case of ClipRect is not so problematic but tends to be more restrictive for fonts.
void ImGui::PushClipRect(const ImVec2& clip_rect_min, const ImVec2& clip_rect_max, bool intersect_with_current_clip_rect)
{
ImGuiWindow* window = GetCurrentWindow();
@ -7574,22 +7576,31 @@ void ImGui::SetCurrentFont(ImFont* font)
g.DrawListSharedData.FontScale = g.FontScale;
}
// Use ImDrawList::_SetTextureID(), making our shared g.FontStack[] authorative against window-local ImDrawList.
// - Whereas ImDrawList::PushTextureID()/PopTextureID() is not to be used across Begin() calls.
// - Note that we don't propagate current texture id when e.g. Begin()-ing into a new window, we never really did...
// - Some code paths never really fully worked with multiple atlas textures.
// - The right-ish solution may be to remove _SetTextureID() and make AddText/RenderText lazily call PushTextureID()/PopTextureID()
// the same way AddImage() does, but then all other primitives would also need to? I don't think we should tackle this problem
// because we have a concrete need and a test bed for multiple atlas textures.
void ImGui::PushFont(ImFont* font)
{
ImGuiContext& g = *GImGui;
if (!font)
if (font == NULL)
font = GetDefaultFont();
SetCurrentFont(font);
g.FontStack.push_back(font);
g.CurrentWindow->DrawList->PushTextureID(font->ContainerAtlas->TexID);
SetCurrentFont(font);
g.CurrentWindow->DrawList->_SetTextureID(font->ContainerAtlas->TexID);
}
void ImGui::PopFont()
{
ImGuiContext& g = *GImGui;
g.CurrentWindow->DrawList->PopTextureID();
IM_ASSERT(g.FontStack.Size > 0);
g.FontStack.pop_back();
SetCurrentFont(g.FontStack.empty() ? GetDefaultFont() : g.FontStack.back());
ImFont* font = g.FontStack.Size == 0 ? GetDefaultFont() : g.FontStack.back();
SetCurrentFont(font);
g.CurrentWindow->DrawList->_SetTextureID(font->ContainerAtlas->TexID);
}
void ImGui::PushItemFlag(ImGuiItemFlags option, bool enabled)