hlsdk-xash3d/game_shared/vgui_loadtga.cpp

94 lines
2.2 KiB
C++

//========= Copyright © 1996-2002, Valve LLC, All rights reserved. ============
//
// Purpose:
//
// $NoKeywords: $
//=============================================================================
#include "../cl_dll/wrect.h"
#include "../cl_dll/cl_dll.h"
#include "vgui.h"
#include "vgui_loadtga.h"
#include "vgui_inputstream.h"
// ---------------------------------------------------------------------- //
// Helper class for loading tga files.
// ---------------------------------------------------------------------- //
class MemoryInputStream : public vgui::InputStream
{
public:
MemoryInputStream()
{
m_pData = NULL;
m_DataLen = m_ReadPos = 0;
}
virtual void seekStart(bool& success) {m_ReadPos=0; success=true;}
virtual void seekRelative(int count,bool& success) {m_ReadPos+=count; success=true;}
virtual void seekEnd(bool& success) {m_ReadPos=m_DataLen; success=true;}
virtual int getAvailable(bool& success) {success=false; return 0;} // This is what vgui does for files...
virtual uchar readUChar(bool& success)
{
if(m_ReadPos>=0 && m_ReadPos<m_DataLen)
{
success=true;
uchar ret = m_pData[m_ReadPos];
++m_ReadPos;
return ret;
}
else
{
success=false;
return 0;
}
}
virtual void readUChar(uchar* buf,int count,bool& success)
{
for(int i=0; i < count; i++)
buf[i] = readUChar(success);
}
virtual void close(bool& success)
{
m_pData = NULL;
m_DataLen = m_ReadPos = 0;
}
uchar *m_pData;
int m_DataLen;
int m_ReadPos;
};
vgui::BitmapTGA* vgui_LoadTGA(char const *pFilename)
{
MemoryInputStream stream;
stream.m_pData = gEngfuncs.COM_LoadFile((char*)pFilename, 5, &stream.m_DataLen);
if(!stream.m_pData)
return NULL;
stream.m_ReadPos = 0;
vgui::BitmapTGA *pRet = new vgui::BitmapTGA(&stream, true);
gEngfuncs.COM_FreeFile(stream.m_pData);
return pRet;
}
vgui::BitmapTGA* vgui_LoadTGANoInvertAlpha(char const *pFilename)
{
MemoryInputStream stream;
stream.m_pData = gEngfuncs.COM_LoadFile((char*)pFilename, 5, &stream.m_DataLen);
if(!stream.m_pData)
return NULL;
stream.m_ReadPos = 0;
vgui::BitmapTGA *pRet = new vgui::BitmapTGA(&stream, false);
gEngfuncs.COM_FreeFile(stream.m_pData);
return pRet;
}