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hammer/texture.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Simple texture object used for sprites. Handed to the renderer
+//			for binding. May become a general purpose texture object.
+//
+//=============================================================================//
+
+#include "stdafx.h"
+#include "Texture.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include <tier0/memdbgon.h>
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Constuctor. Initializes data members.
+//-----------------------------------------------------------------------------
+CTexture::CTexture( void )
+{
+	m_nWidth = 0;
+	m_nHeight = 0;
+
+	m_bHasAlpha = false;
+
+	m_pImageData = NULL;
+
+	m_nTextureID = TEXTURE_ID_NONE;
+
+	m_szName[0] = '\0';
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Destructor. Frees the texture image data.
+//-----------------------------------------------------------------------------
+CTexture::~CTexture( void )
+{
+	if ( m_pImageData != NULL )
+	{
+		delete [] m_pImageData;
+	}
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Allocates image data for a given texture size and pixel format.
+// Input  : nWidth - Desired width of image, in texels.
+//			nHeight - Desired height of image, in texels.
+//			nFlags - Flags indicating the pixel format of the image data. The default
+//					is 24 bit RGB, no alpha component, but can be set to:
+//
+//				TEXTURE_HAS_ALPHA: the image has an alpha component. Each texel is 32 bits.
+//
+// Output : Returns true on success, false on failure.
+//-----------------------------------------------------------------------------
+bool CTexture::Allocate( int nWidth, int nHeight, int nFlags )
+{
+	if ( m_pImageData != NULL )
+	{
+		delete [] m_pImageData;
+
+		m_pImageData = NULL;
+		m_nWidth = 0;
+		m_nHeight = 0;
+	}
+
+	if (( nWidth == 0 ) || ( nHeight == 0 ))
+	{
+		return( false );
+	}
+
+	if ( nFlags & TEXTURE_HAS_ALPHA )
+	{
+		m_pImageData = new unsigned char [nWidth * nHeight * 4];
+		m_bHasAlpha = true;
+	}
+	else
+	{
+		m_pImageData = new unsigned char [nWidth * nHeight * 3];
+		m_bHasAlpha = false;
+	}
+
+	if ( m_pImageData != NULL )
+	{
+		m_nWidth = nWidth;
+		m_nHeight = nHeight;
+	}
+
+	return( m_pImageData != NULL );
+}
+		
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : *pDC - 
+//			rect - 
+//			iFontHeight - 
+//			dwFlags - 
+//-----------------------------------------------------------------------------
+void CTexture::Draw(CDC *pDC, RECT &rect, int iFontHeight, int iIconHeight, DrawTexData_t &DrawTexData)
+{
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Returns the full path of the file from which this texture was loaded.
+//-----------------------------------------------------------------------------
+const char *CTexture::GetFileName() const
+{
+	static char szEmpty[] = "";
+	return(szEmpty);
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Gets the image data in RGB format, or queries the image data size.
+// Input  : pData - Buffer to receive image data. If NULL, no image data is
+//				copied. Otherwise, the buffer must be large enough to hold the
+//				image data.
+// Output : Returns the image data size in bytes.
+//-----------------------------------------------------------------------------
+int CTexture::GetImageDataRGB( void *pData )
+{
+	int nSize = 0;
+
+	if ( m_bHasAlpha )
+	{
+		// Conversion from 32 to 24 bits not implemented.
+		Assert( FALSE );
+	}
+	else
+	{
+		nSize = m_nWidth * m_nHeight * 3;
+
+		if (( pData != NULL ) && ( nSize > 0 ))
+		{
+			memcpy( pData, m_pImageData, nSize );
+		}
+	}
+
+	return( nSize );
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Gets the image data in RGBA format, or queries the image data size.
+// Input  : pData - Buffer to receive image data. If NULL, no image data is
+//				copied. Otherwise, the buffer must be large enough to hold the
+//				image data.
+// Output : Returns the image data size in bytes.
+//-----------------------------------------------------------------------------
+int CTexture::GetImageDataRGBA( void *pData )
+{
+	int nSize = 0;
+
+	if ( m_bHasAlpha )
+	{
+		nSize = m_nWidth * m_nHeight * 4;
+
+		if (( pData != NULL ) && ( nSize > 0 ))
+		{
+			memcpy( pData, m_pImageData, nSize );
+		}
+	}
+	else
+	{
+		// Conversion from 24 to 32 bits not implemented.
+		Assert( FALSE );
+	}
+
+	return( nSize );
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Returns a string of comma delimited keywords associated with this
+//			material.
+// Input  : pszKeywords - Buffer to receive keywords, NULL to query string length.
+// Output : Returns the number of characters in the keyword string.
+//-----------------------------------------------------------------------------
+int CTexture::GetKeywords(char *pszKeywords) const
+{
+	if (pszKeywords != NULL)
+	{
+		*pszKeywords = '\0';
+	}
+
+	return(0);
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : *pszName - 
+// Output : 
+//-----------------------------------------------------------------------------
+int CTexture::GetShortName(char *pszName) const
+{
+	if (pszName != NULL)
+	{
+		strcpy(pszName, m_szName);
+	}
+
+	return(strlen(m_szName));
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Output : Returns true on success, false on failure.
+//-----------------------------------------------------------------------------
+bool CTexture::Load(void)
+{
+	return(true);
+}