/* * The ManaPlus Client * Copyright (C) 2004-2009 The Mana World Development Team * Copyright (C) 2009-2010 The Mana Developers * Copyright (C) 2011-2014 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/>. */ #ifndef USE_SDL2 #include "resources/sdlimagehelper.h" #include "logger.h" #include "main.h" #include "resources/dye.h" #include "resources/dyepalette.h" #include "resources/image.h" #include "utils/sdlcheckutils.h" #include <SDL_gfxBlitFunc.h> #include <SDL_image.h> #include "debug.h" bool SDLImageHelper::mEnableAlphaCache = false; Image *SDLImageHelper::load(SDL_RWops *const rw, Dye const &dye) { SDL_Surface *const tmpImage = loadPng(rw); if (!tmpImage) { logger->log("Error, image load failed: %s", IMG_GetError()); return nullptr; } SDL_PixelFormat rgba; rgba.palette = nullptr; rgba.BitsPerPixel = 32; rgba.BytesPerPixel = 4; rgba.colorkey = 0; rgba.alpha = 255; #if SDL_BYTEORDER == SDL_BIG_ENDIAN rgba.Rmask = 0x000000FF; rgba.Gmask = 0x0000FF00; rgba.Bmask = 0x00FF0000; rgba.Amask = 0xFF000000; #else rgba.Rmask = 0xFF000000; rgba.Gmask = 0x00FF0000; rgba.Bmask = 0x0000FF00; rgba.Amask = 0x000000FF; #endif SDL_Surface *const surf = MSDL_ConvertSurface( tmpImage, &rgba, SDL_SWSURFACE); MSDL_FreeSurface(tmpImage); uint32_t *pixels = static_cast<uint32_t *>(surf->pixels); const int type = dye.getType(); switch (type) { case 1: { const DyePalette *const pal = dye.getSPalete(); if (pal) pal->replaceSColor(pixels, surf->w * surf->h); break; } case 2: { const DyePalette *const pal = dye.getAPalete(); if (pal) pal->replaceAColor(pixels, surf->w * surf->h); break; } case 0: default: { dye.normalDye(pixels, surf->w * surf->h); break; } } Image *const image = load(surf); MSDL_FreeSurface(surf); return image; } Image *SDLImageHelper::load(SDL_Surface *const tmpImage) { return _SDLload(tmpImage); } Image *SDLImageHelper::createTextSurface(SDL_Surface *const tmpImage, const int width A_UNUSED, const int height A_UNUSED, const float alpha) { if (!tmpImage) return nullptr; bool hasAlpha = false; const size_t sz = tmpImage->w * tmpImage->h; // The alpha channel to be filled with alpha values uint8_t *alphaChannel = new uint8_t[sz]; const SDL_PixelFormat *const fmt = tmpImage->format; if (fmt->Amask) { for (size_t i = 0; i < sz; ++ i) { uint32_t c = (static_cast<uint32_t*>(tmpImage->pixels))[i]; const unsigned v = (c & fmt->Amask) >> fmt->Ashift; const uint8_t a = static_cast<const uint8_t>((v << fmt->Aloss) + (v >> (8 - (fmt->Aloss << 1)))); const uint8_t a2 = static_cast<uint8_t>( static_cast<float>(a) * alpha); c &= ~fmt->Amask; c |= ((a2 >> fmt->Aloss) << fmt->Ashift & fmt->Amask); (static_cast<uint32_t*>(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 = MSDL_DisplayFormatAlpha(tmpImage); } else { image = MSDL_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; } Image *const img = new Image(image, hasAlpha, alphaChannel); img->mAlpha = alpha; return img; } SDL_Surface* SDLImageHelper::SDLDuplicateSurface(SDL_Surface *const tmpImage) { if (!tmpImage || !tmpImage->format) return nullptr; return MSDL_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 size_t sz = tmpImage->w * tmpImage->h; // The alpha channel to be filled with alpha values uint8_t *alphaChannel = new uint8_t[sz]; // Figure out whether the image uses its alpha layer if (!tmpImage->format->palette) { const SDL_PixelFormat *const fmt = tmpImage->format; if (fmt->Amask) { const uint32_t amask = fmt->Amask; const uint8_t ashift = fmt->Ashift; const uint8_t aloss = fmt->Aloss; const uint32_t *pixels = static_cast<uint32_t*>(tmpImage->pixels); for (size_t i = 0; i < sz; ++ i) { const unsigned v = (pixels[i] & amask) >> ashift; const uint8_t a = static_cast<const uint8_t>((v << aloss) + (v >> (8 - (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 = MSDL_DisplayFormatAlpha(tmpImage); } else { image = MSDL_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) MSDL_FreeSurface(tmpImage); return new Image(image, hasAlpha, alphaChannel); } int SDLImageHelper::combineSurface(SDL_Surface *restrict const src, SDL_Rect *restrict const srcrect, SDL_Surface *restrict const dst, SDL_Rect *restrict const dstrect) { return SDL_gfxBlitRGBA(src, srcrect, dst, dstrect); } void SDLImageHelper::copySurfaceToImage(const Image *const image, const int x, const int y, SDL_Surface *const surface) const { if (!image || !surface) return; SDL_SetAlpha(surface, 0, SDL_ALPHA_OPAQUE); SDL_Rect rect = { static_cast<int16_t>(x), static_cast<int16_t>(y), static_cast<uint16_t>(surface->w), static_cast<uint16_t>(surface->h) }; SDL_BlitSurface(surface, nullptr, image->mSDLSurface, &rect); } #endif // USE_SDL2