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/*
* Copyright (C) 2004-2009 Team XBMC
* http://www.xbmc.org
*
* 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, 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 XBMC; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
* http://www.gnu.org/copyleft/gpl.html
*
*/
// class CSurface
#include "SurfaceSDL.h"
#ifdef HAS_SDL
#include <stdio.h>
#include "xbox.h"
CGraphicsDevice g_device;
CSurface::CSurface()
{
m_surface = NULL;
m_width = 0;
m_height = 0;
m_bpp = 0;
}
CSurface::~CSurface()
{
if (m_surface)
SDL_FreeSurface(m_surface);
}
bool CSurface::Create(unsigned int width, unsigned int height, CSurface::FORMAT format)
{
if (m_surface)
{
SDL_FreeSurface(m_surface);
m_surface = NULL;
}
m_info.width = width;
m_info.height = height;
m_info.format = format;
if (format == FMT_LIN_ARGB)
{ // round width to multiple of 64 pixels
m_width = (width + 63) & ~63;
m_height = height;
}
else
{ // round up to nearest power of 2
m_width = PadPow2(width);
m_height = PadPow2(height);
}
m_bpp = (format == FMT_PALETTED) ? 1 : 4;
m_surface = SDL_CreateRGBSurface(SDL_SWSURFACE, m_width, m_height, m_bpp * 8,
RMASK, GMASK, BMASK, AMASK);
if (0 == m_surface)
return false;
Clear();
return true;
}
void CSurface::Clear()
{
CSurfaceRect rect;
if (Lock(&rect))
{
BYTE *pixels = rect.pBits;
for (unsigned int i = 0; i < m_height; i++)
{
memset(pixels, 0, rect.Pitch);
pixels += rect.Pitch;
}
Unlock();
}
}
bool CSurface::CreateFromFile(const char *Filename, FORMAT format)
{
SDL_Surface *original = IMG_Load(Filename);
if (!original)
return false;
if (!Create(original->w, original->h, format))
{
SDL_FreeSurface(original);
return false;
}
// copy into our surface
SDL_SetAlpha(original, 0, 255);
int ret = SDL_BlitSurface(original, NULL, m_surface, NULL);
SDL_FreeSurface(original);
ClampToEdge();
return (0 == ret);
}
void CSurface::ClampToEdge()
{
// fix up the last row and column to simulate clamp_to_edge
if (!m_info.width || !m_info.height == 0)
return; // invalid texture
CSurfaceRect rect;
if (Lock(&rect))
{
for (unsigned int y = 0; y < m_info.height; y++)
{
BYTE *src = rect.pBits + y * rect.Pitch;
for (unsigned int x = m_info.width; x < m_width; x++)
memcpy(src + x*m_bpp, src + (m_info.width - 1)*m_bpp, m_bpp);
}
BYTE *src = rect.pBits + (m_info.height - 1) * rect.Pitch;
for (unsigned int y = m_info.height; y < m_height; y++)
{
BYTE *dest = rect.pBits + y * rect.Pitch;
memcpy(dest, src, rect.Pitch);
}
Unlock();
}
}
bool CSurface::Lock(CSurfaceRect *rect)
{
if (m_surface && rect)
{
SDL_LockSurface(m_surface);
rect->pBits = (BYTE *)m_surface->pixels;
rect->Pitch = m_surface->pitch;
return true;
}
return false;
}
bool CSurface::Unlock()
{
if (m_surface)
{
SDL_UnlockSurface(m_surface);
return true;
}
return false;
}
CGraphicsDevice::CGraphicsDevice()
{
}
CGraphicsDevice::~CGraphicsDevice()
{
}
bool CGraphicsDevice::Create()
{
return true;
}
bool CGraphicsDevice::CreateSurface(unsigned int width, unsigned int height, enum CSurface::FORMAT format, CSurface *surface)
{
return false;
}
#endif
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