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common/vgui/vgui_budgethistorypanel.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================//
+
+#include "vgui_basebudgetpanel.h"
+#include "vgui_budgethistorypanel.h"
+#include <vgui/ISurface.h>
+#include "tier0/vprof.h"
+#include "convar.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+ConVar budget_show_history( "budget_show_history", "1", FCVAR_ARCHIVE, "turn history graph off and on. . good to turn off on low end" );
+ConVar budget_history_numsamplesvisible( "budget_history_numsamplesvisible", "100", FCVAR_ARCHIVE, "number of samples to draw in the budget history window.  The lower the better as far as rendering overhead of the budget panel" );
+
+CBudgetHistoryPanel::CBudgetHistoryPanel( CBaseBudgetPanel *pParent, const char *pPanelName ) : 
+	BaseClass( pParent, pPanelName )
+{
+	m_pBudgetPanel = pParent;
+
+	m_nSamplesPerGroup = 0;
+	SetProportional( false );
+	SetKeyBoardInputEnabled( false );
+	SetMouseInputEnabled( false );
+	SetVisible( true );
+	SetPaintBackgroundEnabled( false );
+	SetBgColor( Color( 0, 0, 0, 255 ) );
+	
+	// For some reason, vgui::Frame likes to set the minimum size to (128,66) and we may want to get smaller.
+	SetMinimumSize( 0, 0 );
+}
+
+CBudgetHistoryPanel::~CBudgetHistoryPanel()
+{
+}
+
+void CBudgetHistoryPanel::Paint()
+{
+	if( m_nSamplesPerGroup == 0 )
+	{
+		// SetData hasn't been called yet.
+		return;
+	}
+	if( !budget_show_history.GetBool() )
+	{
+		return;
+	}
+
+	int width, height;
+	GetSize( width, height );
+
+	int startID = m_nSampleOffset - width;
+	while( startID < 0 )
+	{
+		startID += m_nSamplesPerGroup;
+	}
+	int endID = startID + width;
+	int numSamplesVisible = budget_history_numsamplesvisible.GetInt(); 
+	int xOffset = 0;
+	if( endID - startID > numSamplesVisible )
+	{
+		xOffset = ( endID - numSamplesVisible ) - startID;
+		startID = endID - numSamplesVisible;
+	}
+	static CUtlVector<vgui::IntRect> s_Rects;
+	static CUtlVector<float> s_CurrentHeight;
+	s_Rects.EnsureCount( ( endID - startID ) );
+	s_CurrentHeight.EnsureCount( endID - startID );
+	memset( &s_CurrentHeight[0], 0, sizeof( float ) * ( endID - startID ) );
+	int j;
+	float ooRangeMaxMinusMin = 1.0f / ( m_fRangeMax - m_fRangeMin );
+	for( j = 0; j < m_nGroups; j++ )
+	{
+		int i;
+		for( i = startID; i < endID; i++ )
+		{
+			int sampleOffset = i % m_nSamplesPerGroup;
+			int left = i - startID + xOffset;
+			int right = left + 1;
+			float &curHeight = s_CurrentHeight[i - startID];
+			int bottom = ( curHeight - m_fRangeMin ) * ooRangeMaxMinusMin * height;
+			curHeight += m_pData[sampleOffset + m_nSamplesPerGroup * j];
+			int top = ( curHeight - m_fRangeMin ) * ooRangeMaxMinusMin * height;
+			bottom = height - bottom - 1;
+			top = height - top - 1;
+			vgui::IntRect& rect = s_Rects[( i - startID )];
+			rect.x0 = left;
+			rect.x1 = right;
+			rect.y0 = top;
+			rect.y1 = bottom;
+		}
+		
+		int red, green, blue, alpha;
+		m_pBudgetPanel->GetConfigData().m_BudgetGroupInfo[j].m_Color.GetColor( red, green, blue, alpha );
+		
+		vgui::surface()->DrawSetColor( red, green, blue, alpha );
+		vgui::surface()->DrawFilledRectArray( &s_Rects[0], endID - startID );
+	}
+
+	for ( int i=0; i < m_pBudgetPanel->GetConfigData().m_HistoryLabelValues.Count(); i++ )
+	{
+		DrawBudgetLine( m_pBudgetPanel->GetConfigData().m_HistoryLabelValues[i] );
+	}
+}
+
+// Only call this from Paint!!!!!
+void CBudgetHistoryPanel::DrawBudgetLine( float val )
+{
+	int width, height;
+	GetSize( width, height );
+	double y = ( val - m_fRangeMin ) * ( 1.0f / ( m_fRangeMax - m_fRangeMin ) ) * height;
+	int bottom = ( int )( height - y - 1 + .5 );
+	int top = ( int )( height - y - 1 - .5 );
+	vgui::surface()->DrawSetColor( 0, 0, 0, 255 );
+	vgui::surface()->DrawFilledRect( 0, top-1, width, bottom+1 );
+	vgui::surface()->DrawSetColor( 255, 255, 255, 255 );
+	vgui::surface()->DrawFilledRect( 0, top, width, bottom );
+}
+
+
+void CBudgetHistoryPanel::SetData( double *pData, int nGroups, int nSamplesPerGroup, int nSampleOffset )
+{
+	m_pData = pData;
+	m_nGroups = nGroups;
+	m_nSamplesPerGroup = nSamplesPerGroup;
+	m_nSampleOffset = nSampleOffset;
+}
+
+void CBudgetHistoryPanel::SetRange( float fMin, float fMax )
+{
+	m_fRangeMin = fMin;
+	m_fRangeMax = fMax;
+}