#pragma once
#include <cmath>
namespace dragonx { namespace ui { namespace effects {
/// Framebuffer pixel extent for a window-unit extent and ImGui's DisplayFramebufferScale. Same truncation as
/// imgui_impl_opengl3.cpp (`(int)(DisplaySize.x * DisplayFramebufferScale.x)`), so the blit source matches FB 0.
inline int framebufferExtent(float logical, float scale) {
    if (!(scale > 0.0f) || !(logical > 0.0f)) return (int)logical;
    return (int)(logical * scale);
}
/// Source extent for the capture blit: the framebuffer size when known, else the logical size.
inline int captureSourceExtent(int fbExtent, int logicalExtent) { return fbExtent > 0 ? fbExtent : logicalExtent; }
}}}