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/* |
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* The ManaPlus Client |
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* Copyright (C) 2004-2009 The Mana World Development Team |
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* Copyright (C) 2009-2010 The Mana Developers |
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* Copyright (C) 2011-2019 The ManaPlus Developers |
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* Copyright (C) 2019-2021 Andrei Karas |
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* |
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* This file is part of The ManaPlus Client. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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#ifdef USE_OPENGL |
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#include "resources/openglscreenshothelper.h" |
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#include "configuration.h" |
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#include "graphicsmanager.h" |
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#include "render/graphics.h" |
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#include "render/opengl/mgl.h" |
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#ifdef __native_client__ |
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#include "render/opengl/naclglfunctions.h" |
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#endif // __native_client__ |
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#include "debug.h" |
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OpenGLScreenshotHelper::OpenGLScreenshotHelper() : |
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ScreenshotHelper(), |
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mFbo() |
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{ |
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} |
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OpenGLScreenshotHelper::~OpenGLScreenshotHelper() |
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{ |
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} |
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void OpenGLScreenshotHelper::prepare() |
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{ |
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if (config.getBoolValue("usefbo")) |
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graphicsManager.createFBO(mainGraphics->mWidth, |
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mainGraphics->mHeight, |
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&mFbo); |
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} |
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SDL_Surface *OpenGLScreenshotHelper::getScreenshot() |
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{ |
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const int h = mainGraphics->mHeight; |
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const int w = mainGraphics->mWidth - (mainGraphics->mWidth % 4); |
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GLint pack = 1; |
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SDL_Surface *const screenshot = MSDL_CreateRGBSurface( |
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SDL_SWSURFACE, w, h, 24, |
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0xff0000, 0x00ff00, 0x0000ff, 0x000000); |
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if (screenshot == nullptr) |
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return nullptr; |
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if (SDL_MUSTLOCK(screenshot)) |
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SDL_LockSurface(screenshot); |
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const size_t lineSize = 3 * w; |
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GLubyte *const buf = new GLubyte[lineSize]; |
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// Grap the pixel buffer and write it to the SDL surface |
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mglGetIntegerv(GL_PACK_ALIGNMENT, &pack); |
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mglPixelStorei(GL_PACK_ALIGNMENT, 1); |
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mglReadPixels(0, 0, w, h, GL_RGB, GL_UNSIGNED_BYTE, screenshot->pixels); |
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// Flip the screenshot, as OpenGL has 0,0 in bottom left |
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const int h2 = h / 2; |
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for (int i = 0; i < h2; i++) |
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{ |
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GLubyte *const top = static_cast<GLubyte*>( |
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screenshot->pixels) + lineSize * i; |
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GLubyte *const bot = static_cast<GLubyte*>( |
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screenshot->pixels) + lineSize * (h - 1 - i); |
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memcpy(buf, top, lineSize); |
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memcpy(top, bot, lineSize); |
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memcpy(bot, buf, lineSize); |
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} |
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delete [] buf; |
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if (config.getBoolValue("usefbo")) |
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graphicsManager.deleteFBO(&mFbo); |
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mglPixelStorei(GL_PACK_ALIGNMENT, pack); |
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if (SDL_MUSTLOCK(screenshot)) |
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SDL_UnlockSurface(screenshot); |
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return screenshot; |
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} |
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#endif // USE_OPENGL |