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95 lines
2.7 KiB
C++
95 lines
2.7 KiB
C++
#include "sdlvideowrapper.hpp"
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#include <iostream>
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#include <osgViewer/Viewer>
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#include <SDL_video.h>
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namespace SDLUtil
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{
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VideoWrapper::VideoWrapper(SDL_Window *window, osg::ref_ptr<osgViewer::Viewer> viewer)
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: mWindow(window)
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, mViewer(viewer)
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, mGamma(1.f)
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, mContrast(1.f)
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, mHasSetGammaContrast(false)
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{
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SDL_GetWindowGammaRamp(mWindow, mOldSystemGammaRamp, &mOldSystemGammaRamp[256], &mOldSystemGammaRamp[512]);
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}
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VideoWrapper::~VideoWrapper()
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{
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SDL_SetWindowFullscreen(mWindow, 0);
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// If user hasn't touched the defaults no need to restore
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if (mHasSetGammaContrast)
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SDL_SetWindowGammaRamp(mWindow, mOldSystemGammaRamp, &mOldSystemGammaRamp[256], &mOldSystemGammaRamp[512]);
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}
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void VideoWrapper::setSyncToVBlank(bool sync)
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{
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osgViewer::Viewer::Windows windows;
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mViewer->getWindows(windows);
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mViewer->stopThreading();
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for (osgViewer::Viewer::Windows::iterator it = windows.begin(); it != windows.end(); ++it)
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{
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osgViewer::GraphicsWindow* win = *it;
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win->setSyncToVBlank(sync);
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}
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mViewer->startThreading();
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}
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void VideoWrapper::setGammaContrast(float gamma, float contrast)
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{
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if (gamma == mGamma && contrast == mContrast)
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return;
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mGamma = gamma;
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mContrast = contrast;
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mHasSetGammaContrast = true;
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Uint16 red[256], green[256], blue[256];
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for (int i = 0; i < 256; i++)
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{
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float k = i/256.0f;
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k = (k - 0.5f) * contrast + 0.5f;
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k = pow(k, 1.f/gamma);
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k *= 256;
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float value = k*256;
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if (value > 65535) value = 65535;
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else if (value < 0) value = 0;
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red[i] = green[i] = blue[i] = static_cast<Uint16>(value);
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}
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if (SDL_SetWindowGammaRamp(mWindow, red, green, blue) < 0)
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std::cout << "Couldn't set gamma: " << SDL_GetError() << std::endl;
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}
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void VideoWrapper::setVideoMode(int width, int height, bool fullscreen, bool windowBorder)
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{
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SDL_SetWindowFullscreen(mWindow, 0);
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if (SDL_GetWindowFlags(mWindow) & SDL_WINDOW_MAXIMIZED)
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SDL_RestoreWindow(mWindow);
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if (fullscreen)
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{
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SDL_DisplayMode mode;
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SDL_GetWindowDisplayMode(mWindow, &mode);
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mode.w = width;
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mode.h = height;
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SDL_SetWindowDisplayMode(mWindow, &mode);
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SDL_SetWindowFullscreen(mWindow, fullscreen);
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}
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else
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{
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SDL_SetWindowSize(mWindow, width, height);
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SDL_SetWindowBordered(mWindow, windowBorder ? SDL_TRUE : SDL_FALSE);
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}
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}
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}
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