/*
* The ManaPlus Client
* Copyright (C) 2004-2009 The Mana World Development Team
* Copyright (C) 2009-2010 The Mana Developers
* Copyright (C) 2011-2012 The ManaPlus Developers
*
* This file is part of The ManaPlus Client.
*
* 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
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "resources/sdlimagehelper.h"
#include "resources/dye.h"
#include "resources/resourcemanager.h"
#include "client.h"
#include "logger.h"
#include "main.h"
#include "utils/stringutils.h"
#include "resources/image.h"
#include <SDL_image.h>
#include <SDL_rotozoom.h>
#include "debug.h"
bool SDLImageHelper::mEnableAlphaCache = false;
Resource *SDLImageHelper::load(SDL_RWops *rw, Dye const &dye)
{
SDL_Surface *tmpImage = IMG_Load_RW(rw, 1);
if (!tmpImage)
{
logger->log("Error, image load failed: %s", IMG_GetError());
return nullptr;
}
SDL_Surface *surf = nullptr;
SDL_PixelFormat rgba;
rgba.palette = nullptr;
rgba.BitsPerPixel = 32;
rgba.BytesPerPixel = 4;
rgba.colorkey = 0;
rgba.alpha = 255;
rgba.Rmask = 0xFF000000; rgba.Rloss = 0; rgba.Rshift = 24;
rgba.Gmask = 0x00FF0000; rgba.Gloss = 0; rgba.Gshift = 16;
rgba.Bmask = 0x0000FF00; rgba.Bloss = 0; rgba.Bshift = 8;
rgba.Amask = 0x000000FF; rgba.Aloss = 0; rgba.Ashift = 0;
surf = SDL_ConvertSurface(tmpImage, &rgba, SDL_SWSURFACE);
SDL_FreeSurface(tmpImage);
Uint32 *pixels = static_cast<Uint32 *>(surf->pixels);
DyePalette *pal = dye.getSPalete();
if (pal)
{
for (Uint32 *p_end = pixels + surf->w * surf->h;
pixels != p_end; ++pixels)
{
Uint8 *p = reinterpret_cast<Uint8 *>(pixels);
const int alpha = *p & 255;
if (!alpha)
continue;
pal->replaceColor(p + 1);
}
}
else
{
for (Uint32 *p_end = pixels + surf->w * surf->h;
pixels != p_end; ++pixels)
{
const Uint32 p = *pixels;
const int alpha = p & 255;
if (!alpha)
continue;
int v[3];
v[0] = (p >> 24) & 255;
v[1] = (p >> 16) & 255;
v[2] = (p >> 8 ) & 255;
dye.update(v);
*pixels = (v[0] << 24) | (v[1] << 16) | (v[2] << 8) | alpha;
}
}
Image *image = load(surf);
SDL_FreeSurface(surf);
return image;
}
Image *SDLImageHelper::load(SDL_Surface *tmpImage)
{
return _SDLload(tmpImage);
}
Image *SDLImageHelper::createTextSurface(SDL_Surface *tmpImage, float alpha)
{
if (!tmpImage)
return nullptr;
Image *img;
bool hasAlpha = false;
bool converted = false;
const int sz = tmpImage->w * tmpImage->h;
// The alpha channel to be filled with alpha values
Uint8 *alphaChannel = new Uint8[sz];
const SDL_PixelFormat * const fmt = tmpImage->format;
if (fmt->Amask)
{
for (int i = 0; i < sz; ++ i)
{
Uint32 c = (static_cast<Uint32*>(tmpImage->pixels))[i];
unsigned v = (c & fmt->Amask) >> fmt->Ashift;
Uint8 a = (v << fmt->Aloss) + (v >> (8 - (fmt->Aloss << 1)));
Uint8 a2 = static_cast<Uint8>(static_cast<float>(a) * alpha);
c &= ~fmt->Amask;
c |= ((a2 >> fmt->Aloss) << fmt->Ashift & fmt->Amask);
(static_cast<Uint32*>(tmpImage->pixels))[i] = c;
if (a != 255)
hasAlpha = true;
alphaChannel[i] = a;
}
}
SDL_Surface *image;
// Convert the surface to the current display format
if (hasAlpha)
{
image = SDL_DisplayFormatAlpha(tmpImage);
}
else
{
image = SDL_DisplayFormat(tmpImage);
// We also delete the alpha channel since
// it's not used.
delete [] alphaChannel;
alphaChannel = nullptr;
}
if (!image)
{
logger->log1("Error: Image convert failed.");
delete [] alphaChannel;
return nullptr;
}
if (converted)
SDL_FreeSurface(tmpImage);
img = new Image(image, hasAlpha, alphaChannel);
img->mAlpha = alpha;
return img;
}
SDL_Surface* SDLImageHelper::SDLDuplicateSurface(SDL_Surface* tmpImage)
{
if (!tmpImage || !tmpImage->format)
return nullptr;
return SDL_ConvertSurface(tmpImage, tmpImage->format, SDL_SWSURFACE);
}
Image *SDLImageHelper::_SDLload(SDL_Surface *tmpImage)
{
if (!tmpImage)
return nullptr;
bool hasAlpha = false;
bool converted = false;
if (tmpImage->format->BitsPerPixel != 32)
{
tmpImage = convertTo32Bit(tmpImage);
if (!tmpImage)
return nullptr;
converted = true;
}
const int sz = tmpImage->w * tmpImage->h;
// The alpha channel to be filled with alpha values
Uint8 *alphaChannel = new Uint8[sz];
// Figure out whether the image uses its alpha layer
if (!tmpImage->format->palette)
{
const SDL_PixelFormat * const fmt = tmpImage->format;
if (fmt->Amask)
{
for (int i = 0; i < sz; ++ i)
{
unsigned v = ((static_cast<Uint32*>(tmpImage->pixels))[i]
& fmt->Amask) >> fmt->Ashift;
Uint8 a = (v << fmt->Aloss) + (v >> (8 - (fmt->Aloss << 1)));
if (a != 255)
hasAlpha = true;
alphaChannel[i] = a;
}
}
else
{
if (SDL_ALPHA_OPAQUE != 255)
{
hasAlpha = true;
memset(alphaChannel, SDL_ALPHA_OPAQUE, sz);
}
}
}
else
{
if (SDL_ALPHA_OPAQUE != 255)
{
hasAlpha = true;
memset(alphaChannel, SDL_ALPHA_OPAQUE, sz);
}
}
SDL_Surface *image;
// Convert the surface to the current display format
if (hasAlpha)
{
image = SDL_DisplayFormatAlpha(tmpImage);
}
else
{
image = SDL_DisplayFormat(tmpImage);
// We also delete the alpha channel since
// it's not used.
delete [] alphaChannel;
alphaChannel = nullptr;
}
if (!image)
{
logger->log1("Error: Image convert failed.");
delete [] alphaChannel;
return nullptr;
}
if (converted)
SDL_FreeSurface(tmpImage);
return new Image(image, hasAlpha, alphaChannel);
}
int SDLImageHelper::useOpenGL()
{
return 0;
}
