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Alpha-blend color with the checkerboard in color swatches.

This commit is contained in:
Alex Shvartzkop 2023-11-29 03:34:08 +03:00
parent daf178b64f
commit bbba7fd4d7
1 changed files with 53 additions and 55 deletions
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108
common/widgets/color_swatch.cpp
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@ -1,7 +1,7 @@
/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2017-2021 KiCad Developers, see AUTHORS.txt for contributors.
* Copyright (C) 2017-2023 KiCad Developers, see AUTHORS.txt for contributors.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@ -33,10 +33,6 @@ wxDEFINE_EVENT( COLOR_SWATCH_CHANGED, wxCommandEvent );
using KIGFX::COLOR4D;
// See selcolor.cpp:
extern COLOR4D DisplayColorFrame( wxWindow* aParent, COLOR4D aOldColor );
wxBitmap COLOR_SWATCH::MakeBitmap( const COLOR4D& aColor, const COLOR4D& aBackground,
const wxSize& aSize, const wxSize& aCheckerboardSize,
const COLOR4D& aCheckerboardBackground )
@ -57,66 +53,68 @@ void COLOR_SWATCH::RenderToDC( wxDC* aDC, const KIGFX::COLOR4D& aColor,
const wxSize& aCheckerboardSize,
const KIGFX::COLOR4D& aCheckerboardBackground )
{
wxBrush brush;
wxPen pen;
wxBrush brush;
wxPen pen;
brush.SetStyle( wxBRUSHSTYLE_SOLID );
if( aColor == COLOR4D::UNSPECIFIED )
// Draw a checkerboard
COLOR4D white;
COLOR4D black;
bool rowCycle;
if( aCheckerboardBackground.GetBrightness() > 0.4 )
{
// Draw a checkerboard
COLOR4D white;
COLOR4D black;
bool rowCycle;
if( aCheckerboardBackground.GetBrightness() > 0.4 )
{
white = COLOR4D::WHITE;
black = white.Darkened( 0.15 );
rowCycle = true;
}
else
{
black = COLOR4D::BLACK;
white = black.Brightened( 0.15 );
rowCycle = false;
}
for( int x = aRect.GetLeft(); x < aRect.GetRight(); x += aCheckerboardSize.x )
{
bool colCycle = rowCycle;
for( int y = aRect.GetTop(); y < aRect.GetBottom(); y += aCheckerboardSize.y )
{
COLOR4D color = colCycle ? black : white;
brush.SetColour( color.ToColour() );
pen.SetColour( color.ToColour() );
aDC->SetBrush( brush );
aDC->SetPen( pen );
aDC->DrawRectangle( x, y, aCheckerboardSize.x, aCheckerboardSize.y );
colCycle = !colCycle;
}
rowCycle = !rowCycle;
}
white = COLOR4D::WHITE;
black = white.Darkened( 0.15 );
rowCycle = true;
}
else
{
brush.SetColour( aBackground.WithAlpha(1.0).ToColour() );
pen.SetColour( aBackground.WithAlpha(1.0).ToColour() );
black = COLOR4D::BLACK;
white = black.Brightened( 0.15 );
rowCycle = false;
}
aDC->SetBrush( brush );
aDC->SetPen( pen );
aDC->DrawRectangle( aRect );
for( int x = aRect.GetLeft(); x <= aRect.GetRight(); x += aCheckerboardSize.x )
{
bool colCycle = rowCycle;
brush.SetColour( aColor.ToColour() );
pen.SetColour( aColor.ToColour() );
for( int y = aRect.GetTop(); y <= aRect.GetBottom(); y += aCheckerboardSize.y )
{
COLOR4D color = colCycle ? black : white;
brush.SetColour( color.ToColour() );
pen.SetColour( color.ToColour() );
aDC->SetBrush( brush );
aDC->SetPen( pen );
aDC->DrawRectangle( aRect );
aDC->SetBrush( brush );
aDC->SetPen( pen );
aDC->DrawRectangle( x, y, aCheckerboardSize.x, aCheckerboardSize.y );
colCycle = !colCycle;
}
rowCycle = !rowCycle;
}
// Blend fg color with the checkerboard
wxColor fg = aColor.ToColour();
for( int y = aRect.GetTop(); y <= aRect.GetBottom(); y++ )
{
for( int x = aRect.GetLeft(); x <= aRect.GetRight(); x++ )
{
wxColor bg;
aDC->GetPixel( x, y, &bg );
unsigned char r = wxColor::AlphaBlend( fg.Red(), bg.Red(), aColor.a );
unsigned char g = wxColor::AlphaBlend( fg.Green(), bg.Green(), aColor.a );
unsigned char b = wxColor::AlphaBlend( fg.Blue(), bg.Blue(), aColor.a );
pen.SetColour( r, g, b );
aDC->SetPen( pen );
aDC->DrawPoint( x, y );
}
}
}