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vguimatsurface/memorybitmap.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#include <vgui/ISurface.h>
+#include "memorybitmap.h"
+#include <string.h>
+#include <stdlib.h>
+#include "MatSystemSurface.h"
+#include "materialsystem/imaterialvar.h"
+#include "materialsystem/itexture.h"
+#include "bitmap/imageformat.h"
+#include "vtf/vtf.h"
+#include "KeyValues.h"
+#include "TextureDictionary.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+extern CMatSystemSurface g_MatSystemSurface;
+
+using namespace vgui;
+
+//-----------------------------------------------------------------------------
+// Purpose: Constructor
+// Input  : *filename - image file to load 
+//-----------------------------------------------------------------------------
+MemoryBitmap::MemoryBitmap(unsigned char *texture,int wide, int tall)
+{
+	_texture=texture;
+	_uploaded = false;
+	_color = Color(255, 255, 255, 255);
+	_pos[0] = _pos[1] = 0;
+	_valid = true;
+	_w = wide;
+	_h = tall;
+	m_iTextureID = -1;
+
+	ForceUpload(texture,wide,tall);
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Destructor
+//-----------------------------------------------------------------------------
+MemoryBitmap::~MemoryBitmap()
+{
+	// Free the old texture ID.
+	if ( m_iTextureID != -1 )
+	{
+		TextureDictionary()->DestroyTexture( m_iTextureID );
+		m_iTextureID = -1;
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: data accessor
+//-----------------------------------------------------------------------------
+void MemoryBitmap::GetSize(int &wide, int &tall)
+{
+	wide = 0;
+	tall = 0;
+	
+	if (!_valid)
+		return;
+
+	g_MatSystemSurface.DrawGetTextureSize(m_iTextureID, wide, tall);
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: size of the bitmap
+//-----------------------------------------------------------------------------
+void MemoryBitmap::GetContentSize(int &wide, int &tall)
+{
+	GetSize(wide, tall);
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: ignored
+//-----------------------------------------------------------------------------
+void MemoryBitmap::SetSize(int x, int y)
+{
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: data accessor
+//-----------------------------------------------------------------------------
+void MemoryBitmap::SetPos(int x, int y)
+{
+	_pos[0] = x;
+	_pos[1] = y;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: data accessor
+//-----------------------------------------------------------------------------
+void MemoryBitmap::SetColor(Color col)
+{
+	_color = col;
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: returns the file name of the bitmap
+//-----------------------------------------------------------------------------
+const char *MemoryBitmap::GetName()
+{
+	return "MemoryBitmap";
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Renders the loaded image, uploading it if necessary
+//			Assumes a valid image is always returned from uploading
+//-----------------------------------------------------------------------------
+void MemoryBitmap::Paint()
+{
+	if (!_valid)
+		return;
+	
+	// if we have not uploaded yet, lets go ahead and do so
+	if (!_uploaded)
+	{
+		ForceUpload(_texture,_w,_h);
+	}
+	
+	//set the texture current, set the color, and draw the biatch
+	g_MatSystemSurface.DrawSetTexture(m_iTextureID);
+	g_MatSystemSurface.DrawSetColor(_color[0], _color[1], _color[2], _color[3]);
+
+	int wide, tall;
+	GetSize(wide, tall);
+	g_MatSystemSurface.DrawTexturedRect( _pos[0], _pos[1], _pos[0] + wide, _pos[1] + tall);
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: ensures the bitmap has been uploaded
+//-----------------------------------------------------------------------------
+void MemoryBitmap::ForceUpload(unsigned char *texture,int wide, int tall)
+{
+	_texture=texture;
+	bool sizechanged = ( _w != wide || _h != tall );
+	_w = wide;
+	_h = tall;
+
+	if (!_valid)
+		return;
+
+	if(_w==0 || _h==0)
+		return;
+
+	// Not our first time through and the size changed, destroy and recreate texture id...
+	if ( m_iTextureID != -1 && sizechanged )
+	{
+		TextureDictionary()->DestroyTexture( m_iTextureID );
+		m_iTextureID = -1;
+	}
+
+	if ( m_iTextureID == -1 )
+	{
+		m_iTextureID = g_MatSystemSurface.CreateNewTextureID( true );
+	}
+
+	g_MatSystemSurface.DrawSetTextureRGBA( m_iTextureID, texture, wide, tall, true, true );
+
+	_uploaded = true;
+	_valid = g_MatSystemSurface.IsTextureIDValid(m_iTextureID);
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: data accessor
+//-----------------------------------------------------------------------------
+HTexture MemoryBitmap::GetID()
+{
+	return m_iTextureID;
+}
+
+