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| /*
Copyright (C) 2003 Rice1964
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdlib.h>
#include "Config.h"
#include "Debugger.h"
#include "OGLTexture.h"
#include "TextureManager.h"
COGLTexture::COGLTexture(uint32 dwWidth, uint32 dwHeight, TextureUsage usage) :
CTexture(dwWidth,dwHeight,usage),
m_glFmt(GL_RGBA)
{
// Fix me, if usage is AS_RENDER_TARGET, we need to create pbuffer instead of regular texture
m_dwTextureFmt = TEXTURE_FMT_A8R8G8B8; // Always use 32bit to load texture
glGenTextures( 1, &m_dwTextureName );
// Make the width and height be the power of 2
uint32 w;
for (w = 1; w < dwWidth; w <<= 1);
m_dwCreatedTextureWidth = w;
for (w = 1; w < dwHeight; w <<= 1);
m_dwCreatedTextureHeight = w;
if (dwWidth*dwHeight > 256*256)
TRACE4("Large texture: (%d x %d), created as (%d x %d)",
dwWidth, dwHeight,m_dwCreatedTextureWidth,m_dwCreatedTextureHeight);
m_fYScale = (float)m_dwCreatedTextureHeight/(float)m_dwHeight;
m_fXScale = (float)m_dwCreatedTextureWidth/(float)m_dwWidth;
m_pTexture = malloc(m_dwCreatedTextureWidth * m_dwCreatedTextureHeight * GetPixelSize());
switch( options.textureQuality )
{
case TXT_QUALITY_DEFAULT:
if( options.colorQuality == TEXTURE_FMT_A4R4G4B4 )
m_glFmt = GL_RGBA4;
break;
case TXT_QUALITY_32BIT:
break;
case TXT_QUALITY_16BIT:
m_glFmt = GL_RGBA4;
break;
};
LOG_TEXTURE(TRACE2("New texture: (%d, %d)", dwWidth, dwHeight));
}
COGLTexture::~COGLTexture()
{
// Fix me, if usage is AS_RENDER_TARGET, we need to destroy the pbuffer
glDeleteTextures(1, &m_dwTextureName );
free(m_pTexture);
m_pTexture = NULL;
m_dwWidth = 0;
m_dwHeight = 0;
}
bool COGLTexture::StartUpdate(DrawInfo *di)
{
if (m_pTexture == NULL)
return false;
di->dwHeight = (uint16)m_dwHeight;
di->dwWidth = (uint16)m_dwWidth;
di->dwCreatedHeight = m_dwCreatedTextureHeight;
di->dwCreatedWidth = m_dwCreatedTextureWidth;
di->lpSurface = m_pTexture;
di->lPitch = GetPixelSize()*m_dwCreatedTextureWidth;
return true;
}
void COGLTexture::EndUpdate(DrawInfo *di)
{
glBindTexture(GL_TEXTURE_2D, m_dwTextureName);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// Copy the image data from main memory to video card texture memory
glTexImage2D(GL_TEXTURE_2D, 0, m_glFmt, m_dwCreatedTextureWidth, m_dwCreatedTextureHeight, 0, GL_BGRA_EXT, GL_UNSIGNED_BYTE, m_pTexture);
}
// Keep in mind that the real texture is not scaled to fix the created opengl texture yet.
// when the image is need to be scaled, ScaleImageToSurface in CTexure will be called to
// scale the image automatically |
