Transparent issue

[UniqueNotDB]

Version/Branch of Dear ImGui:

Version 1.XX, Branch: XXX (master/docking/etc.)

Back-ends:

imgui_impl_XXX.cpp + imgui_impl_XXX.cpp

Compiler, OS:

Windows 11, Visual Studio

Full config/build information:

No response

Details:

ok so in my imgui im setting the alpha to 1.f but its still a little transparent

Screenshots/Video:

Minimal, Complete and Verifiable Example code:

#include "../Header Files/menu.hh" 
using namespace ImGui;
#include "../Header Files/globals.hh"
#include "../imgui/imgui_internal.h"
#include "../imgui/imgui.h"
#include "../font/icons.h"
#include "../font/Effects.h"
//#include "../font/fade.h"

char key[256];
bool binit = false;
bool open = true;
static void HelpMarker(const char* desc);
void CenterText(const char* text);

void ui::renderMenu() {
    if (!globals.active) return;

    //ImGui::SetNextWindowPos(ImVec2(0, 0), ImGuiCond_Once);
    ImGui::SetNextWindowSize(ImVec2(650, 400));
    ImGui::Begin("2nd atempt at this shit cause old src got fucked", &open, ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoCollapse | ImGuiWindowFlags_NoSavedSettings | ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoScrollWithMouse | ImGuiWindowFlags_NoScrollbar);
    if (!binit) {
        DrawMainParticles();
    }
    ImGui::SetCursorPosX(0);
    ImGui::SetCursorPosY(0);
    ImGui::BeginChild("##sidebar", ImVec2(100, 400));
    ImGui::EndChild();
    float windowWidth = ImGui::GetWindowWidth();
    ImGui::SetCursorPosX((ImGui::GetWindowWidth() - 170) * 0.5f);
    ImGui::SetCursorPosY((ImGui::GetWindowWidth() - 170) * 0.5f);
    if (ImGui::Button("Login", ImVec2(170, 30))) {
        //std::thread(fadein_thenout_thread, 10).detach();
    }
    ImGui::End();
}

void ui::RunStyle()
{
    ImGuiStyle* style = &ImGui::GetStyle();
    style->Colors[ImGuiCol_WindowBg] = ImVec4(0.04f, 0.04f, 0.04f, 1.0f); // Fully opaque
    style->Colors[ImGuiCol_FrameBg] = ImVec4(0.f, 0.f, 0.f, 1.0f); // Fully opaque
    style->Colors[ImGuiCol_ChildBg] = ImVec4(0.078f, 0.078f, 0.078f, 1.0f); // Fully opaque
    style->Colors[ImGuiCol_Button] = ImVec4(48.0f / 255.0f, 110.0f / 255.0f, 191.0f / 255.0f, 1.0f); // Fully opaque
    style->Colors[ImGuiCol_ButtonHovered] = ImVec4(48.0f / 255.0f, 110.0f / 255.0f, 191.0f / 255.0f, 1.0f); // Fully opaque
    style->Colors[ImGuiCol_ButtonActive] = ImVec4(48.0f / 255.0f, 110.0f / 255.0f, 191.0f / 255.0f, 1.0f); // Fully opaque

    style->WindowRounding = 1.f;
    style->WindowBorderSize = 0.f;
    style->FrameRounding = 1.f;
    style->ChildRounding = 1.f;
}



static void HelpMarker(const char* desc)
{
    ImGui::TextDisabled("(?)");
    if (ImGui::IsItemHovered())
    {
        ImGui::BeginTooltip();
        ImGui::PushTextWrapPos(ImGui::GetFontSize() * 35.0f);
        ImGui::TextUnformatted(desc);
        ImGui::PopTextWrapPos();
        ImGui::EndTooltip();
    }
}

void CenterText(const char* text)
{
    if (text == nullptr)
        return;

    ImGui::Spacing();
    ImGui::SameLine((ImGui::GetContentRegionAvail().x / 2) - (ImGui::CalcTextSize(text).x / 2));
    ImGui::Text(text);
    ImGui::Spacing();
}

[ruby3141]

I don't think your button and/or window background is translucent, because each elements are in exact color you've set.

Window background color is RGB(10, 10, 10)(lightness 0.0390625 ~= 0.4),
Child background color is RGB(20, 20, 20) (lightness 0.078125 ~= 0.078),
Button color is RGB(48, 110, 191).

If anything is translucent, it's color should've mixed with other background elements.
(Especially for button. It would appear darker if not opaque.)

I doubt that constellation "background" is actually drawn over everything.

[ruby3141]

By the way your issue seems incomplete because you didn't include your constellation-drawing logic, possibly inside DrawMainParticles().

[ocornut]

Sorry but #1586