/* * 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/image.h" #include "resources/dye.h" #include "resources/resourcemanager.h" #ifdef USE_OPENGL #include "normalopenglgraphics.h" #include "safeopenglgraphics.h" #endif #include "client.h" #include "logger.h" #include "resources/imagehelper.h" #include "resources/openglimagehelper.h" #include "resources/sdlimagehelper.h" #include "resources/subimage.h" #include <SDL_image.h> #include <SDL_rotozoom.h> #include "debug.h" Image::Image(SDL_Surface *image, bool hasAlphaChannel0, uint8_t *alphaChannel): mAlpha(1.0f), mHasAlphaChannel(hasAlphaChannel0), mSDLSurface(image), mAlphaChannel(alphaChannel), mUseAlphaCache(SDLImageHelper::mEnableAlphaCache), mIsAlphaVisible(hasAlphaChannel0), #ifdef USE_OPENGL mIsAlphaCalculated(false), mGLImage(0) #else mIsAlphaCalculated(false) #endif { mBounds.x = 0; mBounds.y = 0; mLoaded = false; if (mSDLSurface) { mBounds.w = static_cast<uint16_t>(mSDLSurface->w); mBounds.h = static_cast<uint16_t>(mSDLSurface->h); mLoaded = true; } else { logger->log( "Image::Image(SDL_Surface*): Couldn't load invalid Surface!"); mBounds.w = 0; mBounds.h = 0; } } #ifdef USE_OPENGL Image::Image(GLuint glimage, int width, int height, int texWidth, int texHeight): mAlpha(1.0f), mHasAlphaChannel(true), mSDLSurface(nullptr), mAlphaChannel(nullptr), mUseAlphaCache(false), mIsAlphaVisible(true), mIsAlphaCalculated(false), mGLImage(glimage), mTexWidth(texWidth), mTexHeight(texHeight) { mBounds.x = 0; mBounds.y = 0; mBounds.w = static_cast<uint16_t>(width); mBounds.h = static_cast<uint16_t>(height); if (mGLImage) { mLoaded = true; } else { logger->log( "Image::Image(GLuint*, ...): Couldn't load invalid Surface!"); mLoaded = false; } } #endif Image::~Image() { unload(); } 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 = nullptr; } mAlphaCache.clear(); } void Image::unload() { mLoaded = false; if (mSDLSurface) { SDLCleanCache(); // Free the image surface. SDL_FreeSurface(mSDLSurface); mSDLSurface = nullptr; delete [] mAlphaChannel; mAlphaChannel = nullptr; } #ifdef USE_OPENGL if (mGLImage) { glDeleteTextures(1, &mGLImage); mGLImage = 0; #ifdef DEBUG_OPENGL_LEAKS if (textures_count > 0) textures_count --; #endif } #endif } bool Image::hasAlphaChannel() { if (mLoaded) return mHasAlphaChannel; #ifdef USE_OPENGL if (OpenGLImageHelper::mUseOpenGL) return true; #endif return false; } SDL_Surface *Image::getByAlpha(float alpha) { std::map<float, SDL_Surface*>::const_iterator it = mAlphaCache.find(alpha); if (it != mAlphaCache.end()) return (*it).second; return nullptr; } void Image::setAlpha(float alpha) { if (mAlpha == alpha || !ImageHelper::mEnableAlpha) return; if (alpha < 0.0f || alpha > 1.0f) return; if (mSDLSurface) { if (mUseAlphaCache) { SDL_Surface *surface = getByAlpha(mAlpha); if (!surface) { if (mAlphaCache.size() > 100) { #ifdef DEBUG_ALPHA_CACHE logger->log("cleanCache"); for (std::map<float, SDL_Surface*>::const_iterator i = mAlphaCache.begin(), i_end = mAlphaCache.end(); i != i_end; ++i) { logger->log("alpha: " + toString(i->first)); } #endif SDLCleanCache(); } surface = mSDLSurface; if (surface) mAlphaCache[mAlpha] = surface; } else { logger->log("cache bug"); } surface = getByAlpha(alpha); if (surface) { // logger->log("hit"); if (mSDLSurface == surface) logger->log("bug"); // else // SDL_FreeSurface(mSDLSurface); mAlphaCache.erase(alpha); mSDLSurface = surface; mAlpha = alpha; return; } else { mSDLSurface = SDLImageHelper::SDLDuplicateSurface(mSDLSurface); } // logger->log("miss"); } mAlpha = alpha; if (!mHasAlphaChannel) { // Set the alpha value this image is drawn at SDL_SetAlpha(mSDLSurface, SDL_SRCALPHA, static_cast<unsigned char>(255 * mAlpha)); } else { if (SDL_MUSTLOCK(mSDLSurface)) SDL_LockSurface(mSDLSurface); // Precompute as much as possible const int maxHeight = std::min((mBounds.y + mBounds.h), mSDLSurface->h); const int maxWidth = std::min((mBounds.x + mBounds.w), mSDLSurface->w); const int i1 = mBounds.y * mSDLSurface->w + mBounds.x; const int i2 = (maxHeight - 1) * mSDLSurface->w + maxWidth - 1; const SDL_PixelFormat * const fmt = mSDLSurface->format; for (int i = i1; i <= i2; i++) { // Only change the pixel if it was visible at load time... uint8_t sourceAlpha = mAlphaChannel[i]; if (sourceAlpha > 0) { uint8_t a = static_cast<uint8_t>( static_cast<float>(sourceAlpha) * mAlpha); uint32_t c = (static_cast<uint32_t*>( mSDLSurface->pixels))[i]; c &= ~fmt->Amask; c |= ((a >> fmt->Aloss) << fmt->Ashift & fmt->Amask); (static_cast<uint32_t*>(mSDLSurface->pixels))[i] = c; } } if (SDL_MUSTLOCK(mSDLSurface)) SDL_UnlockSurface(mSDLSurface); } } else { mAlpha = alpha; } } Image* Image::SDLgetScaledImage(const int width, const int height) const { // No scaling on incorrect new values. if (width == 0 || height == 0) return nullptr; // No scaling when there is ... no different given size ... if (width == mBounds.w && height == mBounds.h) return nullptr; Image* scaledImage = nullptr; SDL_Surface* scaledSurface = nullptr; if (mSDLSurface) { scaledSurface = zoomSurface(mSDLSurface, static_cast<double>(width) / mBounds.w, static_cast<double>(height) / mBounds.h, 1); // The load function takes care of the SDL<->OpenGL implementation // and about freeing the given SDL_surface*. if (scaledSurface) { scaledImage = imageHelper->load(scaledSurface); SDL_FreeSurface(scaledSurface); } } return scaledImage; } Image *Image::getSubImage(int x, int y, int width, int height) { // Create a new clipped sub-image #ifdef USE_OPENGL if (OpenGLImageHelper::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; }