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openmw/components/sdlutil/sdlvideowrapper.cpp

144 lines
4.3 KiB
C++

#include "sdlvideowrapper.hpp"
#include <components/debug/debuglog.hpp>
#include <components/sdlutil/sdlgraphicswindow.hpp>
#include <components/settings/settings.hpp>
#include <osgViewer/Viewer>
#include <SDL_video.h>
namespace SDLUtil
{
VideoWrapper::VideoWrapper(SDL_Window* window, osg::ref_ptr<osgViewer::Viewer> viewer)
: mWindow(window)
, mViewer(viewer)
, mGamma(1.f)
, mContrast(1.f)
, mHasSetGammaContrast(false)
{
SDL_GetWindowGammaRamp(mWindow, mOldSystemGammaRamp, &mOldSystemGammaRamp[256], &mOldSystemGammaRamp[512]);
}
VideoWrapper::~VideoWrapper()
{
SDL_SetWindowFullscreen(mWindow, 0);
// If user hasn't touched the defaults no need to restore
if (mHasSetGammaContrast)
SDL_SetWindowGammaRamp(mWindow, mOldSystemGammaRamp, &mOldSystemGammaRamp[256], &mOldSystemGammaRamp[512]);
}
void VideoWrapper::setSyncToVBlank(int mode)
{
VSyncMode vsyncMode = VSyncMode::Disabled;
if (mode == 1)
vsyncMode = VSyncMode::Enabled;
else if (mode == 2)
vsyncMode = VSyncMode::Adaptive;
osgViewer::Viewer::Windows windows;
mViewer->getWindows(windows);
mViewer->stopThreading();
for (osgViewer::Viewer::Windows::iterator it = windows.begin(); it != windows.end(); ++it)
{
osgViewer::GraphicsWindow* win = *it;
if (GraphicsWindowSDL2* sdl2win = dynamic_cast<GraphicsWindowSDL2*>(win))
sdl2win->setSyncToVBlank(vsyncMode);
else
win->setSyncToVBlank(static_cast<bool>(mode));
}
mViewer->startThreading();
}
void VideoWrapper::setGammaContrast(float gamma, float contrast)
{
if (gamma == mGamma && contrast == mContrast)
return;
mGamma = gamma;
mContrast = contrast;
mHasSetGammaContrast = true;
Uint16 red[256], green[256], blue[256];
for (int i = 0; i < 256; i++)
{
float k = i / 256.0f;
k = (k - 0.5f) * contrast + 0.5f;
k = pow(k, 1.f / gamma);
k *= 256;
float value = k * 256;
if (value > 65535)
value = 65535;
else if (value < 0)
value = 0;
red[i] = green[i] = blue[i] = static_cast<Uint16>(value);
}
if (SDL_SetWindowGammaRamp(mWindow, red, green, blue) < 0)
Log(Debug::Warning) << "Couldn't set gamma: " << SDL_GetError();
}
void VideoWrapper::setVideoMode(int width, int height, Settings::WindowMode windowMode, bool windowBorder)
{
SDL_SetWindowFullscreen(mWindow, 0);
if (SDL_GetWindowFlags(mWindow) & SDL_WINDOW_MAXIMIZED)
SDL_RestoreWindow(mWindow);
int w, h;
SDL_GetWindowSize(mWindow, &w, &h);
int dw, dh;
SDL_GL_GetDrawableSize(mWindow, &dw, &dh);
if (windowMode == Settings::WindowMode::Fullscreen || windowMode == Settings::WindowMode::WindowedFullscreen)
{
SDL_DisplayMode mode;
SDL_GetWindowDisplayMode(mWindow, &mode);
mode.w = width / (dw / w);
mode.h = height / (dh / h);
SDL_SetWindowDisplayMode(mWindow, &mode);
SDL_SetWindowFullscreen(mWindow,
windowMode == Settings::WindowMode::Fullscreen ? SDL_WINDOW_FULLSCREEN : SDL_WINDOW_FULLSCREEN_DESKTOP);
}
else
{
SDL_SetWindowSize(mWindow, width / (dw / w), height / (dh / h));
SDL_SetWindowBordered(mWindow, windowBorder ? SDL_TRUE : SDL_FALSE);
centerWindow();
}
}
void VideoWrapper::centerWindow()
{
// Resize breaks the sdl window in some cases; see issue: #5539
SDL_Rect rect{};
int x = 0;
int y = 0;
int w = 0;
int h = 0;
auto index = SDL_GetWindowDisplayIndex(mWindow);
SDL_GetDisplayBounds(index, &rect);
SDL_GetWindowSize(mWindow, &w, &h);
x = rect.x;
y = rect.y;
// Center dimensions that do not fill the screen
if (w < rect.w)
{
x = rect.x + rect.w / 2 - w / 2;
}
if (h < rect.h)
{
y = rect.y + rect.h / 2 - h / 2;
}
SDL_SetWindowPosition(mWindow, x, y);
}
}