T2GLTexture_GL.cpp

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#include "ToshiPCH.h"
#include "T2GLTexture_GL.h"
#include "T2Render_GL.h"
 
TOSHI_NAMESPACE_START
 
T2GLTexture::~T2GLTexture()
{
    if ( m_pHandle != 0 )
        Destroy();
}
 
void T2GLTexture::Destroy()
{
    T2TextureManager::GetSingleton()->RemoveTexture( this );
    T2Render::DestroyTexture( m_pHandle );
}
 
void T2GLTexture::Create( TEXTURE_FORMAT a_eFormat, UINT a_uiWidth, UINT a_uiHeight, const void* a_pData )
{
    if ( m_pHandle != 0 )
        Destroy();
 
    m_pchTexName = "runtime";
 
    GLenum glFormat =
        ( a_eFormat == TEXTURE_FORMAT_R8G8B8A8_UNORM ) ? GL_RGBA :
        ( a_eFormat == TEXTURE_FORMAT_R8G8_UNORM )     ? GL_RG :
                                                         GL_R;
 
    m_pHandle       = T2Render::CreateTexture( a_uiWidth, a_uiHeight, glFormat, glFormat, GL_UNSIGNED_BYTE, TFALSE, a_pData );
    m_uiWidth       = a_uiWidth;
    m_uiHeight      = a_uiHeight;
    m_uiMipMapCount = 1;
    m_eFormat       = a_eFormat;
 
    T2TextureManager::GetSingleton()->AddTexture( this );
}
 
void T2GLTexture::SetWrap( TEXTURE_ADDRESS_MODE eAddressU, TEXTURE_ADDRESS_MODE eAddressV )
{
    m_eAddressU = eAddressU;
    m_eAddressV = eAddressV;
}
 
T2TextureManager::T2TextureManager()
    : m_pLastTexture( TNULL )
{
    {
        // White texture
        constexpr int WhiteTextureWidth  = 8;
        constexpr int WhiteTextureHeight = 8;
        constexpr int WhiteTextureSize   = WhiteTextureWidth * WhiteTextureHeight * 4;
 
        TUINT8* srcData = (TUINT8*)TMemalign( WhiteTextureSize, 16 );
        TUtil::MemSet( srcData, 0xFF, WhiteTextureSize );
 
        m_pWhiteTexture = new T2GLTexture;
        m_pWhiteTexture->Create( TEXTURE_FORMAT_R8G8B8A8_UNORM, WhiteTextureWidth, WhiteTextureHeight, srcData );
        m_pWhiteTexture->SetName( "white" );
        m_pWhiteTexture->m_pNextTexture = TNULL;
        m_pWhiteTexture->m_pPrevTexture = TNULL;
        TFree( srcData );
    }
 
    {
        // Invalid texture
        constexpr int InvalidTextureWidth  = 128;
        constexpr int InvalidTextureHeight = 128;
        constexpr int InvalidTextureSize   = InvalidTextureWidth * InvalidTextureHeight * 4;
 
        TUINT8* srcData = (TUINT8*)TMemalign( InvalidTextureSize, 16 );
 
        for ( TUINT8* pos = srcData; pos < srcData + InvalidTextureSize; pos += 4 )
        {
            *( pos )     = rand() % 256;
            *( pos + 1 ) = rand() % 256;
            *( pos + 2 ) = rand() % 256;
            *( pos + 3 ) = rand() % 256;
        }
 
        m_pInvalidTexture = new T2GLTexture;
        m_pInvalidTexture->Create( TEXTURE_FORMAT_R8G8B8A8_UNORM, 8, 8, srcData );
        m_pInvalidTexture->SetName( "invalid" );
        m_pInvalidTexture->m_pNextTexture = TNULL;
        m_pInvalidTexture->m_pPrevTexture = TNULL;
        TFree( srcData );
    }
}
 
T2GLTexture* T2TextureManager::FindTexture( const TCHAR* a_pchTexName )
{
    T2GLTexture* pCurrentTex = m_pLastTexture;
 
    while ( TTRUE )
    {
        if ( pCurrentTex == TNULL )
            return m_pInvalidTexture;
 
        if ( !T2String8::CompareNoCase( pCurrentTex->GetName(), a_pchTexName ) )
            break;
 
        pCurrentTex = pCurrentTex->m_pPrevTexture;
    }
 
    return pCurrentTex;
}
 
void T2TextureManager::AddTexture( T2GLTexture* a_pTexture )
{
    a_pTexture->m_pPrevTexture = GetLastTexture();
    a_pTexture->m_pNextTexture = TNULL;
 
    if ( a_pTexture->m_pPrevTexture != TNULL )
        a_pTexture->m_pPrevTexture->m_pNextTexture = a_pTexture;
 
    m_pLastTexture = a_pTexture;
}
 
void T2TextureManager::RemoveTexture( T2GLTexture* a_pTexture )
{
    if ( a_pTexture->m_pPrevTexture )
        a_pTexture->m_pPrevTexture->m_pNextTexture = a_pTexture->m_pNextTexture;
 
    if ( a_pTexture->m_pNextTexture )
        a_pTexture->m_pNextTexture->m_pPrevTexture = a_pTexture->m_pPrevTexture;
 
    if ( m_pLastTexture == a_pTexture )
        m_pLastTexture = a_pTexture->m_pPrevTexture;
 
    a_pTexture->m_pNextTexture = TNULL;
    a_pTexture->m_pPrevTexture = TNULL;
}
 
TOSHI_NAMESPACE_END