Overrides - Color grading - Color wheel
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1 changed files with 134 additions and 1 deletions
135
main.cc
135
main.cc
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@ -304,6 +304,129 @@ bool CGCComponentBar_(
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return false;
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}
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bool HueSaturationPad(
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char const* const name ,
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float* const hue ,
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float* const saturation ,
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const float size = 180.f ) noexcept
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{
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using namespace ImGui;
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// Check/set bounding box
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const auto wSize{ ImMin( size , CalcItemWidth( ) ) };
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auto* const win( GetCurrentWindow( ) );
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const ImVec2 cPos( win->DC.CursorPos );
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const ImRect bb{ cPos , cPos + ImVec2( wSize , wSize ) };
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auto& style( GetStyle( ) );
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auto id{ win->GetID( name ) };
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ItemSize( bb , style.FramePadding.y );
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if ( !ItemAdd( bb , id ) ) {
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return false;
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}
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const ImVec2 wCenter{ cPos + ImVec2( wSize * .5f , wSize * .5f ) };
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const float wThickness = wSize * 0.08f;
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const float wOuterRadius = wSize * 0.50f;
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const float wInnerRadius = wOuterRadius - wThickness;
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auto* const ctx( GetCurrentContext( ) );
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const auto mPos{ ctx->IO.MousePos };
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const auto rmPos{ mPos - wCenter };
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const auto mcSqDist{ rmPos.x * rmPos.x + rmPos.y * rmPos.y };
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const bool hovered{ mcSqDist <= wSize * wSize * .25f };
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const bool tabFocus{ FocusableItemRegister( win , id ) };
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if ( tabFocus || ( hovered && ctx->IO.MouseClicked[ 0 ] ) ) {
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SetActiveID( id , win );
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FocusWindow( win );
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}
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const bool active{ ctx->ActiveId == id };
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float nHue{ *hue } , nSat{ *saturation };
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if ( active ) {
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if ( ctx->IO.MouseDown[ 0 ] ) {
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nHue = ( 1.f + atan2f( -rmPos.y , -rmPos.x ) / IM_PI ) * .5f;
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nSat = ImSaturate( sqrtf( mcSqDist ) / wInnerRadius );
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} else {
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ClearActiveID( );
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}
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} else if ( hovered && ctx->IO.KeyCtrl && ctx->IO.MouseWheel != 0.f ) {
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const auto change{ ctx->IO.MouseWheel * .005f };
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if ( ctx->IO.KeyShift ) {
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nSat = ImSaturate( nSat + change );
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} else {
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nHue = fmodf( nHue + change + 1.f , 1.f );
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}
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}
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//- DRAW ---------------------------------------------------------------
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auto* const dl( GetWindowDrawList( ) );
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const float aeps = 1.5f / wOuterRadius; // Half a pixel arc length in radians (2pi cancels out).
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const int segmentPerArc = ImMax( 4 , (int) wOuterRadius / 12 );
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const ImU32 hue_colors[] = {
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IM_COL32( 255 , 0 , 0 , 255 ) ,
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IM_COL32( 255 , 255 , 0 , 255 ) ,
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IM_COL32( 0 , 255 , 0 , 255 ) ,
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IM_COL32( 0 , 255 , 255 , 255 ) ,
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IM_COL32( 0 , 0 , 255 , 255 ) ,
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IM_COL32( 255 , 0 , 255 , 255 ) ,
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IM_COL32( 255 , 0 , 0 , 255 )
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};
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const auto avgRadius( ( wInnerRadius + wOuterRadius ) * .5f );
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// Pad background and cross
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const auto bgColor{ GetColorU32( ( hovered || active )
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? ImVec4( .4f , .4f , .4f , 1 )
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: ImVec4( .25f , .25f , .25f , 1 ) ) };
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dl->AddCircleFilled( wCenter , avgRadius , bgColor );
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dl->AddLine( wCenter - ImVec2( 0 , avgRadius ) ,
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wCenter + ImVec2( 0 , avgRadius ) ,
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GetColorU32( ImVec4( .1 , .1 , .1 , 1 ) ) );
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dl->AddLine( wCenter - ImVec2( avgRadius , 0 ) ,
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wCenter + ImVec2( avgRadius , 0 ) ,
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GetColorU32( ImVec4( .1 , .1 , .1 , 1 ) ) );
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// Color wheel
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for ( int n = 0 ; n < 6 ; n ++ ) {
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const float a0 = ( n ) / 6.f * 2.f * IM_PI - aeps;
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const float a1 = ( n + 1.f ) / 6.f * 2.f * IM_PI + aeps;
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const int vStart = dl->_VtxCurrentIdx;
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dl->PathArcTo( wCenter , avgRadius , a0 , a1 , segmentPerArc );
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dl->PathStroke( IM_COL32_WHITE , false, wThickness);
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// Paint colors over existing vertices
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const ImVec2 gradientP0(
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wCenter.x + cosf( a0 ) * wInnerRadius ,
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wCenter.y + sinf( a0 ) * wInnerRadius );
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const ImVec2 gradientP1(
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wCenter.x + cosf( a1 ) * wInnerRadius ,
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wCenter.y + sinf( a1 ) * wInnerRadius );
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ShadeVertsLinearColorGradientKeepAlpha(
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dl->_VtxWritePtr - ( dl->_VtxCurrentIdx - vStart ),
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dl->_VtxWritePtr ,
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gradientP0 , gradientP1 ,
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hue_colors[ n ] , hue_colors[ n + 1 ] );
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}
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// Cursor from hue and saturation
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const float cAngle{ nHue * 2 * IM_PI };
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const float cDist{ nSat * wInnerRadius };
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ImVec4 cColor{ 0 , 0 , 0 , 1 };
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ColorConvertHSVtoRGB( *hue , *saturation , 1 , cColor.x , cColor.y , cColor.z );
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dl->AddCircleFilled( wCenter + ImVec2( cos( cAngle ) * cDist , sin( cAngle ) * cDist ) ,
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( wOuterRadius - wInnerRadius ) * .5f ,
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GetColorU32( cColor ) );
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dl->AddCircle( wCenter + ImVec2( cos( cAngle ) * cDist , sin( cAngle ) * cDist ) ,
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( wOuterRadius - wInnerRadius ) * .5f ,
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GetColorU32( ImVec4( 1 , 1 , 1 , 1 ) ) );
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// Update values
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if ( *hue != nHue || *saturation != nSat ) {
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*hue = nHue;
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*saturation = nSat;
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return true;
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}
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return false;
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}
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bool ColorGradingControls(
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char const* const name ,
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float* const red ,
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@ -320,7 +443,7 @@ bool ColorGradingControls(
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ImGuiWindow* const window{ GetCurrentWindow() };
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ImGuiStorage* const storage{ window->DC.StateStorage };
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const bool wheelMode{ storage->GetBool( window->GetID( name ) ) };
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const bool wheelMode{ storage->GetBool( window->GetID( name ) , true ) };
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// Mode selection
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bool modeChanged{ false };
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@ -334,6 +457,16 @@ bool ColorGradingControls(
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bool changed;
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if ( wheelMode ^ modeChanged ) {
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changed = false;
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const float scRed { ImSaturate( ( *red - base ) / ( unit * 2 ) ) } ,
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scGreen{ ImSaturate( ( *green - base ) / ( unit * 2 ) ) } ,
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scBlue { ImSaturate( ( *blue - base ) / ( unit * 2 ) ) };
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float H , S , V;
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ColorConvertRGBtoHSV( scRed , scGreen , scBlue , H , S , V );
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// FIXME test
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static float fh = 0.f , fs = 0.f;
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HueSaturationPad( "##wheel" , &fh , &fs , 180.f );
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#warning implement the fuck
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} else {
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PushItemWidth( -1 );
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