haskal
/
kicad
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Diff Layer Transparancy Fallback for Low Framebuffer Count

This commit is contained in:
Chartreuse 2023-03-20 13:05:24 +00:00 committed by Mike Williams
parent 45b94a4b3e
commit 0d5976c52b
1 changed files with 31 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
common/gal/opengl/opengl_gal.cpp
View File

@ -506,7 +506,15 @@ void OPENGL_GAL::BeginDrawing()
// Prepare rendering target buffers // Prepare rendering target buffers
m_compositor->Initialize(); m_compositor->Initialize();
m_mainBuffer = m_compositor->CreateBuffer(); m_mainBuffer = m_compositor->CreateBuffer();
m_tempBuffer = m_compositor->CreateBuffer(); try
{
m_tempBuffer = m_compositor->CreateBuffer();
}
catch( const std::runtime_error& )
{
wxLogVerbose( "Could not create a framebuffer for diff mode blending.\n" );
m_tempBuffer = 0;
}
try try
{ {
m_overlayBuffer = m_compositor->CreateBuffer(); m_overlayBuffer = m_compositor->CreateBuffer();
@ -1957,7 +1965,8 @@ void OPENGL_GAL::ClearTarget( RENDER_TARGET aTarget )
break; break;
case TARGET_TEMP: case TARGET_TEMP:
m_compositor->SetBuffer( m_tempBuffer ); if( m_tempBuffer )
m_compositor->SetBuffer( m_tempBuffer );
break; break;
case TARGET_OVERLAY: case TARGET_OVERLAY:
@ -1981,10 +1990,10 @@ bool OPENGL_GAL::HasTarget( RENDER_TARGET aTarget )
switch( aTarget ) switch( aTarget )
{ {
default: default:
case TARGET_TEMP:
case TARGET_CACHED: case TARGET_CACHED:
case TARGET_NONCACHED: return true; case TARGET_NONCACHED: return true;
case TARGET_OVERLAY: return ( m_overlayBuffer != 0 ); case TARGET_OVERLAY: return ( m_overlayBuffer != 0 );
case TARGET_TEMP: return ( m_tempBuffer != 0 );
} }
} }
@ -1992,18 +2001,31 @@ bool OPENGL_GAL::HasTarget( RENDER_TARGET aTarget )
void OPENGL_GAL::StartDiffLayer() void OPENGL_GAL::StartDiffLayer()
{ {
m_currentManager->EndDrawing(); m_currentManager->EndDrawing();
SetTarget( TARGET_TEMP ); if( m_tempBuffer )
ClearTarget( TARGET_TEMP ); {
SetTarget( TARGET_TEMP );
ClearTarget( TARGET_TEMP );
}
} }
void OPENGL_GAL::EndDiffLayer() void OPENGL_GAL::EndDiffLayer()
{ {
glBlendEquation( GL_MAX ); if( m_tempBuffer )
m_currentManager->EndDrawing(); {
glBlendEquation( GL_FUNC_ADD ); glBlendEquation( GL_MAX );
m_currentManager->EndDrawing();
glBlendEquation( GL_FUNC_ADD );
m_compositor->DrawBuffer( m_tempBuffer, m_mainBuffer ); m_compositor->DrawBuffer( m_tempBuffer, m_mainBuffer );
}
else
{
// Fall back to imperfect alpha blending on single buffer
glBlendFunc( GL_SRC_ALPHA, GL_ONE );
m_currentManager->EndDrawing();
glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
}
} }