furnace/src/gui/volMeter.cpp

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/**
* Furnace Tracker - multi-system chiptune tracker
* Copyright (C) 2021-2022 tildearrow and contributors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "gui.h"
#include "imgui_internal.h"
void FurnaceGUI::drawVolMeter() {
if (nextWindow==GUI_WINDOW_VOL_METER) {
volMeterOpen=true;
ImGui::SetNextWindowFocus();
nextWindow=GUI_WINDOW_NOTHING;
}
if (!volMeterOpen) return;
if (--isClipping<0) isClipping=0;
ImGui::SetNextWindowSizeConstraints(ImVec2(6.0f*dpiScale,6.0f*dpiScale),ImVec2(scrW*dpiScale,scrH*dpiScale));
ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding,ImVec2(0,0));
ImGui::PushStyleVar(ImGuiStyleVar_FramePadding,ImVec2(0,0));
ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing,ImVec2(0,0));
ImGui::PushStyleVar(ImGuiStyleVar_ItemInnerSpacing,ImVec2(0,0));
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if (ImGui::Begin("Volume Meter",&volMeterOpen,globalWinFlags)) {
ImDrawList* dl=ImGui::GetWindowDrawList();
bool aspectRatio=(ImGui::GetWindowSize().x/ImGui::GetWindowSize().y)>1.0;
ImVec2 minArea=ImVec2(
ImGui::GetWindowPos().x+ImGui::GetCursorPos().x,
ImGui::GetWindowPos().y+ImGui::GetCursorPos().y
);
ImVec2 maxArea=ImVec2(
ImGui::GetWindowPos().x+ImGui::GetCursorPos().x+ImGui::GetContentRegionAvail().x,
ImGui::GetWindowPos().y+ImGui::GetCursorPos().y+ImGui::GetContentRegionAvail().y
);
ImRect rect=ImRect(minArea,maxArea);
ImGuiStyle& style=ImGui::GetStyle();
ImGui::ItemSize(ImVec2(4.0f,4.0f),style.FramePadding.y);
ImU32 lowColor=ImGui::GetColorU32(uiColors[GUI_COLOR_VOLMETER_LOW]);
if (ImGui::ItemAdd(rect,ImGui::GetID("volMeter"))) {
ImGui::RenderFrame(rect.Min,rect.Max,ImGui::GetColorU32(ImGuiCol_FrameBg),true,style.FrameRounding);
for (int i=0; i<2; i++) {
float logPeak=(20*log10(peak[i])/36.0);
if (logPeak==NAN) logPeak=0.0;
if (logPeak<-1.0) logPeak=-1.0;
if (logPeak>0.0) {
isClipping=8;
logPeak=0.0;
}
logPeak+=1.0;
ImU32 highColor=ImGui::GetColorU32(
ImLerp(uiColors[GUI_COLOR_VOLMETER_LOW],uiColors[GUI_COLOR_VOLMETER_HIGH],logPeak)
);
ImRect s;
if (aspectRatio) {
s=ImRect(
ImLerp(rect.Min,rect.Max,ImVec2(0,float(i)*0.5)),
ImLerp(rect.Min,rect.Max,ImVec2(logPeak,float(i+1)*0.5))
);
if (i==0) s.Max.y-=dpiScale;
if (isClipping) {
dl->AddRectFilled(s.Min,s.Max,ImGui::GetColorU32(uiColors[GUI_COLOR_VOLMETER_PEAK]));
} else {
dl->AddRectFilledMultiColor(s.Min,s.Max,lowColor,highColor,highColor,lowColor);
}
} else {
s=ImRect(
ImLerp(rect.Min,rect.Max,ImVec2(float(i)*0.5,1.0-logPeak)),
ImLerp(rect.Min,rect.Max,ImVec2(float(i+1)*0.5,1.0))
);
if (i==0) s.Max.x-=dpiScale;
if (isClipping) {
dl->AddRectFilled(s.Min,s.Max,ImGui::GetColorU32(uiColors[GUI_COLOR_VOLMETER_PEAK]));
} else {
dl->AddRectFilledMultiColor(s.Min,s.Max,highColor,highColor,lowColor,lowColor);
}
}
}
if (ImGui::IsItemHovered()) {
if (aspectRatio) {
ImGui::SetTooltip("%.1fdB",36*((ImGui::GetMousePos().x-ImGui::GetItemRectMin().x)/(rect.Max.x-rect.Min.x)-1.0));
} else {
ImGui::SetTooltip("%.1fdB",-(36+36*((ImGui::GetMousePos().y-ImGui::GetItemRectMin().y)/(rect.Max.y-rect.Min.y)-1.0)));
}
}
}
}
ImGui::PopStyleVar(4);
if (ImGui::IsWindowFocused(ImGuiFocusedFlags_ChildWindows)) curWindow=GUI_WINDOW_VOL_METER;
ImGui::End();
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}