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/*
* The Mana Client
* Copyright (C) 2004-2009 The Mana World Development Team
* Copyright (C) 2009-2012 The Mana Developers
*
* This file is part of The Mana 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/image.h"
#include "resources/dye.h"
#include "resources/resourcemanager.h"
#ifdef USE_OPENGL
#include "openglgraphics.h"
#endif
#include "log.h"
#include "configuration.h"
#include <SDL_image.h>
#include <SDL_rotozoom.h>
#ifdef USE_OPENGL
bool Image::mUseOpenGL = false;
int Image::mTextureType = 0;
int Image::mTextureSize = 0;
#endif
bool Image::mEnableAlphaCache = false;
// The low CPU mode is disabled per default
bool Image::mDisableTransparency = false;
Image::Image(SDL_Surface *image, bool hasAlphaChannel, Uint8 *alphaChannel):
mAlpha(1.0f),
mSDLSurface(image),
mAlphaChannel(alphaChannel),
mHasAlphaChannel(hasAlphaChannel)
{
#ifdef USE_OPENGL
mGLImage = 0;
#endif
mUseAlphaCache = Image::mEnableAlphaCache;
mBounds.x = 0;
mBounds.y = 0;
mLoaded = false;
if (mSDLSurface)
{
mBounds.w = mSDLSurface->w;
mBounds.h = mSDLSurface->h;
mLoaded = true;
}
else
logger->log(
"Image::Image(SDL_Surface*): Couldn't load invalid Surface!");
}
#ifdef USE_OPENGL
Image::Image(GLuint glimage, int width, int height, int texWidth, int texHeight):
mAlpha(1.0f),
mSDLSurface(0),
mAlphaChannel(0),
mHasAlphaChannel(true),
mUseAlphaCache(false),
mGLImage(glimage),
mTexWidth(texWidth),
mTexHeight(texHeight)
{
mBounds.x = 0;
mBounds.y = 0;
mBounds.w = width;
mBounds.h = height;
if (mGLImage)
mLoaded = true;
else
{
logger->log(
"Image::Image(GLuint*, ...): Couldn't load invalid Surface!");
mLoaded = false;
}
}
#endif
Image::~Image()
{
unload();
}
Resource *Image::load(SDL_RWops *rw)
{
SDL_Surface *tmpImage = IMG_Load_RW(rw, 1);
if (!tmpImage)
{
logger->log("Error, image load failed: %s", IMG_GetError());
return NULL;
}
Image *image = load(tmpImage);
SDL_FreeSurface(tmpImage);
return image;
}
Resource *Image::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 NULL;
}
SDL_PixelFormat rgba;
rgba.palette = NULL;
rgba.BitsPerPixel = 32;
rgba.BytesPerPixel = 4;
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;
rgba.colorkey = 0;
rgba.alpha = 255;
SDL_Surface *surf = SDL_ConvertSurface(tmpImage, &rgba, SDL_SWSURFACE);
SDL_FreeSurface(tmpImage);
Uint32 *pixels = static_cast< Uint32 * >(surf->pixels);
for (Uint32 *p_end = pixels + surf->w * surf->h; pixels != p_end; ++pixels)
{
int alpha = *pixels & 255;
if (!alpha) continue;
int v[3];
v[0] = (*pixels >> 24) & 255;
v[1] = (*pixels >> 16) & 255;
v[2] = (*pixels >> 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 *Image::load(SDL_Surface *tmpImage)
{
#ifdef USE_OPENGL
if (mUseOpenGL)
return _GLload(tmpImage);
#endif
return _SDLload(tmpImage);
}
void Image::SDLcleanCache()
{
ResourceManager *resman = ResourceManager::getInstance();
for (std::map<float, SDL_Surface*>::iterator
i = mAlphaCache.begin(), i_end = mAlphaCache.end();
i != i_end; ++i)
{
if (mSDLSurface != i->second)
resman->scheduleDelete(i->second);
i->second = 0;
}
mAlphaCache.clear();
}
void Image::unload()
{
mLoaded = false;
if (mSDLSurface)
{
SDLcleanCache();
// Free the image surface.
SDL_FreeSurface(mSDLSurface);
mSDLSurface = NULL;
delete[] mAlphaChannel;
mAlphaChannel = NULL;
}
#ifdef USE_OPENGL
if (mGLImage)
{
glDeleteTextures(1, &mGLImage);
mGLImage = 0;
}
#endif
}
bool Image::useOpenGL()
{
#ifdef USE_OPENGL
return mUseOpenGL;
#else
return false;
#endif
}
bool Image::hasAlphaChannel()
{
if (!mLoaded)
return false;
#ifdef USE_OPENGL
if (mUseOpenGL)
return true;
#endif
return mHasAlphaChannel;
}
SDL_Surface *Image::getByAlpha(float alpha)
{
std::map<float, SDL_Surface*>::iterator it = mAlphaCache.find(alpha);
if (it != mAlphaCache.end())
return (*it).second;
return 0;
}
void Image::setAlpha(float alpha)
{
if (!useOpenGL() && mDisableTransparency)
return;
if (mAlpha == alpha)
return;
if (alpha < 0.0f || alpha > 1.0f)
return;
if (mSDLSurface)
{
if (mUseAlphaCache)
{
SDL_Surface *surface = getByAlpha(mAlpha);
if (!surface)
{
if (mAlphaCache.size() > 100)
SDLcleanCache();
mAlphaCache[mAlpha] = mSDLSurface;
}
surface = getByAlpha(alpha);
if (surface)
{
mAlphaCache.erase(alpha);
mSDLSurface = surface;
mAlpha = alpha;
return;
}
else
{
mSDLSurface = Image::SDLduplicateSurface(mSDLSurface);
}
}
mAlpha = alpha;
if (!hasAlphaChannel())
{
// Set the alpha value this image is drawn at
SDL_SetAlpha(mSDLSurface, SDL_SRCALPHA, (int) (255 * mAlpha));
}
else
{
if (SDL_MUSTLOCK(mSDLSurface))
SDL_LockSurface(mSDLSurface);
// Precompute as much as possible
int maxHeight = std::min((mBounds.y + mBounds.h), mSDLSurface->h);
int maxWidth = std::min((mBounds.x + mBounds.w), mSDLSurface->w);
int i = 0;
for (int y = mBounds.y; y < maxHeight; y++)
for (int x = mBounds.x; x < maxWidth; x++)
{
i = y * mSDLSurface->w + x;
// Only change the pixel if it was visible at load time...
Uint8 sourceAlpha = mAlphaChannel[i];
if (sourceAlpha > 0)
{
Uint8 r, g, b, a;
SDL_GetRGBA(((Uint32*) mSDLSurface->pixels)[i],
mSDLSurface->format,
&r, &g, &b, &a);
a = (Uint8) (sourceAlpha * mAlpha);
// Here is the pixel we want to set
((Uint32 *)(mSDLSurface->pixels))[i] =
SDL_MapRGBA(mSDLSurface->format, r, g, b, a);
}
}
if (SDL_MUSTLOCK(mSDLSurface))
SDL_UnlockSurface(mSDLSurface);
}
}
else
{
mAlpha = alpha;
}
}
Image *Image::SDLgetScaledImage(int width, int height)
{
if (width == 0 || height == 0)
return 0;
// Increase our reference count and return ourselves in case of same size
if (width == getWidth() && height == getHeight())
{
incRef();
return this;
}
if (!mSDLSurface)
return 0;
ResourceManager *resman = ResourceManager::getInstance();
// Generate a unique ID path for storing the scaled version in the
// resource manager.
std::string idPath = getIdPath();
idPath += ":scaled:";
idPath += toString(width);
idPath += "x";
idPath += toString(height);
// Try whether a scaled version is already available
Image *scaledImage = static_cast<Image*>(resman->get(idPath));
if (!scaledImage)
{
// No scaled version with this size exists already, so create one
SDL_Surface *scaledSurface = zoomSurface(mSDLSurface,
(double) width / getWidth(),
(double) height / getHeight(),
1);
if (scaledSurface)
{
scaledImage = load(scaledSurface);
SDL_FreeSurface(scaledSurface);
// Place the scaled image in the resource manager
resman->addResource(idPath, scaledImage);
}
}
return scaledImage;
}
SDL_Surface* Image::SDLduplicateSurface(SDL_Surface* tmpImage)
{
if (!tmpImage || !tmpImage->format)
return NULL;
return SDL_ConvertSurface(tmpImage, tmpImage->format, SDL_SWSURFACE);
}
Image *Image::_SDLload(SDL_Surface *tmpImage)
{
if (!tmpImage)
return NULL;
bool hasAlpha = false;
// The alpha channel to be filled with alpha values
Uint8 *alphaChannel = new Uint8[tmpImage->w * tmpImage->h];
if (tmpImage->format->BitsPerPixel == 32)
{
// Figure out whether the image uses its alpha layer
for (int i = 0; i < tmpImage->w * tmpImage->h; ++i)
{
Uint8 r, g, b, a;
SDL_GetRGBA(
((Uint32*) tmpImage->pixels)[i],
tmpImage->format,
&r, &g, &b, &a);
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 = NULL;
}
if (!image)
{
logger->log("Error: Image convert failed.");
delete[] alphaChannel;
return NULL;
}
return new Image(image, hasAlpha, alphaChannel);
}
#ifdef USE_OPENGL
Image *Image::_GLload(SDL_Surface *tmpImage)
{
// Flush current error flag.
glGetError();
int width = tmpImage->w;
int height = tmpImage->h;
int realWidth = powerOfTwo(width);
int realHeight = powerOfTwo(height);
if (realWidth < width || realHeight < height)
{
logger->log("Warning: image too large, cropping to %dx%d texture!",
tmpImage->w, tmpImage->h);
}
// Make sure the alpha channel is not used, but copied to destination
SDL_SetAlpha(tmpImage, 0, SDL_ALPHA_OPAQUE);
// Determine 32-bit masks based on byte order
Uint32 rmask, gmask, bmask, amask;
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
rmask = 0xff000000;
gmask = 0x00ff0000;
bmask = 0x0000ff00;
amask = 0x000000ff;
#else
rmask = 0x000000ff;
gmask = 0x0000ff00;
bmask = 0x00ff0000;
amask = 0xff000000;
#endif
SDL_Surface *oldImage = tmpImage;
tmpImage = SDL_CreateRGBSurface(SDL_SWSURFACE, realWidth, realHeight,
32, rmask, gmask, bmask, amask);
if (!tmpImage)
{
logger->log("Error, image convert failed: out of memory");
return NULL;
}
SDL_BlitSurface(oldImage, NULL, tmpImage, NULL);
GLuint texture;
glGenTextures(1, &texture);
OpenGLGraphics::bindTexture(mTextureType, texture);
if (SDL_MUSTLOCK(tmpImage))
SDL_LockSurface(tmpImage);
glTexImage2D(
mTextureType, 0, 4,
tmpImage->w, tmpImage->h,
0, GL_RGBA, GL_UNSIGNED_BYTE,
tmpImage->pixels);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glTexParameteri(mTextureType, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
if (SDL_MUSTLOCK(tmpImage))
SDL_UnlockSurface(tmpImage);
SDL_FreeSurface(tmpImage);
GLenum error = glGetError();
if (error)
{
std::string errmsg = "Unknown error";
switch (error)
{
case GL_INVALID_ENUM:
errmsg = "GL_INVALID_ENUM";
break;
case GL_INVALID_VALUE:
errmsg = "GL_INVALID_VALUE";
break;
case GL_INVALID_OPERATION:
errmsg = "GL_INVALID_OPERATION";
break;
case GL_STACK_OVERFLOW:
errmsg = "GL_STACK_OVERFLOW";
break;
case GL_STACK_UNDERFLOW:
errmsg = "GL_STACK_UNDERFLOW";
break;
case GL_OUT_OF_MEMORY:
errmsg = "GL_OUT_OF_MEMORY";
break;
}
logger->log("Error: Image GL import failed: %s", errmsg.c_str());
return NULL;
}
return new Image(texture, width, height, realWidth, realHeight);
}
void Image::setLoadAsOpenGL(bool useOpenGL)
{
Image::mUseOpenGL = useOpenGL;
}
int Image::powerOfTwo(int input)
{
int value;
if (mTextureType == GL_TEXTURE_2D)
{
value = 1;
while (value < input && value < mTextureSize)
{
value <<= 1;
}
}
else
{
value = input;
}
return value >= mTextureSize ? mTextureSize : value;
}
#endif
Image *Image::getSubImage(int x, int y, int width, int height)
{
// Create a new clipped sub-image
#ifdef USE_OPENGL
if (mUseOpenGL)
return new SubImage(this, mGLImage, x, y, width, height,
mTexWidth, mTexHeight);
#endif
return new SubImage(this, mSDLSurface, x, y, width, height);
}
void Image::SDLterminateAlphaCache()
{
SDLcleanCache();
mUseAlphaCache = false;
}
//============================================================================
// SubImage Class
//============================================================================
SubImage::SubImage(Image *parent, SDL_Surface *image,
int x, int y, int width, int height):
Image(image),
mParent(parent)
{
if (mParent)
{
mParent->incRef();
mParent->SDLterminateAlphaCache();
mHasAlphaChannel = mParent->hasAlphaChannel();
mAlphaChannel = mParent->SDLgetAlphaChannel();
}
else
{
mHasAlphaChannel = false;
mAlphaChannel = 0;
}
// Set up the rectangle.
mBounds.x = x;
mBounds.y = y;
mBounds.w = width;
mBounds.h = height;
mUseAlphaCache = false;
}
#ifdef USE_OPENGL
SubImage::SubImage(Image *parent, GLuint image,
int x, int y, int width, int height,
int texWidth, int texHeight):
Image(image, width, height, texWidth, texHeight),
mParent(parent)
{
mParent->incRef();
// Set up the rectangle.
mBounds.x = x;
mBounds.y = y;
mBounds.w = width;
mBounds.h = height;
}
#endif
SubImage::~SubImage()
{
// Avoid destruction of the image
mSDLSurface = 0;
// Avoid possible destruction of its alpha channel
mAlphaChannel = 0;
#ifdef USE_OPENGL
mGLImage = 0;
#endif
mParent->decRef();
}
Image *SubImage::getSubImage(int x, int y, int w, int h)
{
return mParent->getSubImage(mBounds.x + x, mBounds.y + y, w, h);
}
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