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/*
* The ManaPlus Client
* Copyright (C) 2004-2009 The Mana World Development Team
* Copyright (C) 2009-2010 The Mana Developers
* Copyright (C) 2011-2015 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/>.
*/
#ifdef USE_OPENGL
#include "resources/openglscreenshothelper.h"
#include "configuration.h"
#include "graphicsmanager.h"
#include "render/mgl.h"
#ifdef __native_client__
#include "render/naclglfunctions.h"
#endif
#include "debug.h"
OpenGLScreenshotHelper::OpenGLScreenshotHelper() :
ScreenshotHelper(),
mFbo()
{
}
OpenGLScreenshotHelper::~OpenGLScreenshotHelper()
{
}
void OpenGLScreenshotHelper::prepare(const int width,
const int height)
{
if (config.getBoolValue("usefbo"))
graphicsManager.createFBO(width, height, &mFbo);
}
SDL_Surface *OpenGLScreenshotHelper::getScreenshot(const int width,
const int height)
{
const int h = height;
const int w = width - (width % 4);
GLint pack = 1;
SDL_Surface *const screenshot = MSDL_CreateRGBSurface(
SDL_SWSURFACE, w, h, 24,
0xff0000, 0x00ff00, 0x0000ff, 0x000000);
if (!screenshot)
return nullptr;
if (SDL_MUSTLOCK(screenshot))
SDL_LockSurface(screenshot);
const size_t lineSize = 3 * w;
GLubyte *const buf = new GLubyte[lineSize];
// Grap the pixel buffer and write it to the SDL surface
mglGetIntegerv(GL_PACK_ALIGNMENT, &pack);
mglPixelStorei(GL_PACK_ALIGNMENT, 1);
mglReadPixels(0, 0, w, h, GL_RGB, GL_UNSIGNED_BYTE, screenshot->pixels);
// Flip the screenshot, as OpenGL has 0,0 in bottom left
const int h2 = h / 2;
for (int i = 0; i < h2; i++)
{
GLubyte *const top = static_cast<GLubyte*>(
screenshot->pixels) + lineSize * i;
GLubyte *const bot = static_cast<GLubyte*>(
screenshot->pixels) + lineSize * (h - 1 - i);
memcpy(buf, top, lineSize);
memcpy(top, bot, lineSize);
memcpy(bot, buf, lineSize);
}
delete [] buf;
if (config.getBoolValue("usefbo"))
graphicsManager.deleteFBO(&mFbo);
mglPixelStorei(GL_PACK_ALIGNMENT, pack);
if (SDL_MUSTLOCK(screenshot))
SDL_UnlockSurface(screenshot);
return screenshot;
}
#endif // USE_OPENGL
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