/* * The ManaPlus Client * Copyright (C) 2004-2009 The Mana World Development Team * Copyright (C) 2009-2010 The Mana Developers * Copyright (C) 2011-2013 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 "resources/image.h" #include <SDL_image.h> #include <SDL_rotozoom.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; 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; SDL_Surface *surf = SDL_ConvertSurface(tmpImage, &rgba, SDL_SWSURFACE); SDL_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) { for (uint32_t *p_end = pixels + surf->w * surf->h; pixels != p_end; ++pixels) { uint8_t *const p = reinterpret_cast<uint8_t *>(pixels); const int alpha = *p & 255; if (!alpha) continue; pal->replaceSColor(p + 1); } } break; } case 2: { const DyePalette *const pal = dye.getAPalete(); if (pal) { for (uint32_t *p_end = pixels + surf->w * surf->h; pixels != p_end; ++pixels) { pal->replaceAColor(reinterpret_cast<uint8_t *>(pixels)); } } break; } case 0: default: { for (uint32_t *p_end = pixels + surf->w * surf->h; pixels != p_end; ++pixels) { const uint32_t 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; } break; } } Image *const image = load(surf); SDL_FreeSurface(surf); return image; } Image *SDLImageHelper::load(SDL_Surface *const tmpImage) { return _SDLload(tmpImage); } Image *SDLImageHelper::createTextSurface(SDL_Surface *const tmpImage, int width A_UNUSED, int height A_UNUSED, const float alpha) { if (!tmpImage) return nullptr; Image *img; bool hasAlpha = false; const bool converted = false; const int 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 (int 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 = 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 *const tmpImage) { if (!tmpImage || !tmpImage->format) return nullptr; return SDL_ConvertSurface(tmpImage, tmpImage->format, SDL_SWSURFACE); } Image *SDLImageHelper::_SDLload(SDL_Surface *tmpImage) const { 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_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) { for (int i = 0; i < sz; ++ i) { const unsigned v = ((static_cast<uint32_t*>( tmpImage->pixels))[i] & fmt->Amask) >> fmt->Ashift; const uint8_t a = static_cast<const uint8_t>((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; } SDL_Surface *SDLImageHelper::create32BitSurface(int width, int height) { #if SDL_BYTEORDER == SDL_BIG_ENDIAN const int rmask = 0xff000000; const int gmask = 0x00ff0000; const int bmask = 0x0000ff00; const int amask = 0x000000ff; #else const int rmask = 0x000000ff; const int gmask = 0x0000ff00; const int bmask = 0x00ff0000; const int amask = 0xff000000; #endif return SDL_CreateRGBSurface(SDL_SWSURFACE, width, height, 32, rmask, gmask, bmask, amask); }