527 lines
12 KiB
C++
527 lines
12 KiB
C++
/* Copyright (C) 2014 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. 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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* (at your option) any later version.
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*
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* 0 A.D. 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 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "precompiled.h"
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#include "VideoMode.h"
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#include "graphics/Camera.h"
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#include "graphics/GameView.h"
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#include "gui/GUIManager.h"
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#include "lib/config2.h"
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#include "lib/ogl.h"
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#include "lib/external_libraries/libsdl.h"
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#include "lib/sysdep/gfx.h"
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#include "ps/CConsole.h"
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#include "ps/CLogger.h"
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#include "ps/ConfigDB.h"
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#include "ps/Game.h"
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#include "ps/GameSetup/Config.h"
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#include "renderer/Renderer.h"
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#if OS_MACOSX
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# include "lib/sysdep/os/osx/osx_sys_version.h"
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#endif
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static int DEFAULT_WINDOW_W = 1024;
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static int DEFAULT_WINDOW_H = 768;
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static int DEFAULT_FULLSCREEN_W = 1024;
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static int DEFAULT_FULLSCREEN_H = 768;
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CVideoMode g_VideoMode;
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CVideoMode::CVideoMode() :
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m_IsFullscreen(false), m_IsInitialised(false), m_Window(NULL),
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m_PreferredW(0), m_PreferredH(0), m_PreferredBPP(0), m_PreferredFreq(0),
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m_ConfigW(0), m_ConfigH(0), m_ConfigBPP(0), m_ConfigFullscreen(false), m_ConfigForceS3TCEnable(true),
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m_WindowedW(DEFAULT_WINDOW_W), m_WindowedH(DEFAULT_WINDOW_H)
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{
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// (m_ConfigFullscreen defaults to false, so users don't get stuck if
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// e.g. half the filesystem is missing and the config files aren't loaded)
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}
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void CVideoMode::ReadConfig()
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{
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bool windowed = !m_ConfigFullscreen;
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CFG_GET_VAL("windowed", Bool, windowed);
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m_ConfigFullscreen = !windowed;
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CFG_GET_VAL("xres", Int, m_ConfigW);
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CFG_GET_VAL("yres", Int, m_ConfigH);
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CFG_GET_VAL("bpp", Int, m_ConfigBPP);
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CFG_GET_VAL("force_s3tc_enable", Bool, m_ConfigForceS3TCEnable);
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}
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bool CVideoMode::SetVideoMode(int w, int h, int bpp, bool fullscreen)
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{
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#if SDL_VERSION_ATLEAST(2, 0, 0)
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Uint32 flags = SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN;
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if (fullscreen)
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flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
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else
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flags |= SDL_WINDOW_RESIZABLE;
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if (!m_Window)
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{
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m_Window = SDL_CreateWindow("0 A.D.", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, w, h, flags);
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if (!m_Window)
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{
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// If fullscreen fails, try windowed mode
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if (fullscreen)
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{
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LOGWARNING(L"Failed to set the video mode to fullscreen for the chosen resolution "
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L"%dx%d:%d (\"%hs\"), falling back to windowed mode",
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w, h, bpp, SDL_GetError());
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// Using default size for the window for now, as the attempted setting
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// could be as large, or larger than the screen size.
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return SetVideoMode(DEFAULT_WINDOW_W, DEFAULT_WINDOW_H, bpp, false);
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}
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else
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{
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LOGERROR(L"SetVideoMode failed in SDL_CreateWindow: %dx%d:%d %d (\"%hs\")",
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w, h, bpp, fullscreen ? 1 : 0, SDL_GetError());
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return false;
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}
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}
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if (SDL_SetWindowDisplayMode(m_Window, NULL) < 0)
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{
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LOGERROR(L"SetVideoMode failed in SDL_SetWindowDisplayMode: %dx%d:%d %d (\"%hs\")",
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w, h, bpp, fullscreen ? 1 : 0, SDL_GetError());
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return false;
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}
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SDL_GLContext context = SDL_GL_CreateContext(m_Window);
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if (!context)
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{
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LOGERROR(L"SetVideoMode failed in SDL_GL_CreateContext: %dx%d:%d %d (\"%hs\")",
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w, h, bpp, fullscreen ? 1 : 0, SDL_GetError());
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return false;
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}
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}
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else
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{
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if (m_IsFullscreen != fullscreen)
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{
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if (SDL_SetWindowFullscreen(m_Window, flags) < 0)
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{
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LOGERROR(L"SetVideoMode failed in SDL_SetWindowFullscreen: %dx%d:%d %d (\"%hs\")",
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w, h, bpp, fullscreen ? 1 : 0, SDL_GetError());
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return false;
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}
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}
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if (!fullscreen)
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SDL_SetWindowSize(m_Window, w, h);
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}
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// Grab the current video settings
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SDL_GetWindowSize(m_Window, &m_CurrentW, &m_CurrentH);
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m_CurrentBPP = bpp;
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if (fullscreen)
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SDL_SetWindowGrab(m_Window, SDL_TRUE);
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else
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SDL_SetWindowGrab(m_Window, SDL_FALSE);
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#else // SDL 1.2:
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Uint32 flags = SDL_OPENGL;
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if (fullscreen)
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flags |= SDL_FULLSCREEN;
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#if !OS_MACOSX
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// TODO: Fix window resizing on OS X, see http://trac.wildfiregames.com/ticket/741
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else
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flags |= SDL_RESIZABLE;
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#endif
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SDL_Surface* screen = SDL_SetVideoMode(w, h, bpp, flags);
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if (!screen)
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{
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// If fullscreen fails, try windowed mode
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if (fullscreen)
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{
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LOGWARNING(L"Failed to set the video mode to fullscreen for the chosen resolution "
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L"%dx%d:%d (\"%hs\"), falling back to windowed mode",
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w, h, bpp, SDL_GetError());
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// Using default size for the window for now, as the attempted setting
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// could be as large, or larger than the screen size.
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return SetVideoMode(DEFAULT_WINDOW_W, DEFAULT_WINDOW_H, bpp, false);
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}
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else
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{
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LOGERROR(L"SetVideoMode failed: %dx%d:%d %d (\"%hs\")",
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w, h, bpp, fullscreen ? 1 : 0, SDL_GetError());
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return false;
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}
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}
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// Grab the current video settings
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m_CurrentW = screen->w;
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m_CurrentH = screen->h;
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m_CurrentBPP = screen->format->BitsPerPixel;
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if (fullscreen)
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SDL_WM_GrabInput(SDL_GRAB_ON);
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else
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SDL_WM_GrabInput(SDL_GRAB_OFF);
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#endif
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m_IsFullscreen = fullscreen;
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g_xres = m_CurrentW;
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g_yres = m_CurrentH;
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return true;
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}
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bool CVideoMode::InitSDL()
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{
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ENSURE(!m_IsInitialised);
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ReadConfig();
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EnableS3TC();
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// preferred video mode = current desktop settings
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// (command line params may override these)
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gfx::GetVideoMode(&m_PreferredW, &m_PreferredH, &m_PreferredBPP, &m_PreferredFreq);
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int w = m_ConfigW;
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int h = m_ConfigH;
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if (m_ConfigFullscreen)
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{
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// If fullscreen and no explicit size set, default to the desktop resolution
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if (w == 0 || h == 0)
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{
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w = m_PreferredW;
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h = m_PreferredH;
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}
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}
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// If no size determined, default to something sensible
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if (w == 0 || h == 0)
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{
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w = DEFAULT_WINDOW_W;
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h = DEFAULT_WINDOW_H;
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}
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if (!m_ConfigFullscreen)
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{
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// Limit the window to the screen size (if known)
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if (m_PreferredW)
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w = std::min(w, m_PreferredW);
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if (m_PreferredH)
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h = std::min(h, m_PreferredH);
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}
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int bpp = GetBestBPP();
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SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
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SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8);
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SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
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#if !SDL_VERSION_ATLEAST(2, 0, 0)
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SDL_GL_SetAttribute(SDL_GL_SWAP_CONTROL, g_VSync ? 1 : 0);
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#endif
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#if CONFIG2_GLES && SDL_VERSION_ATLEAST(2, 0, 0)
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// Require GLES 2.0
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
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#endif
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if (!SetVideoMode(w, h, bpp, m_ConfigFullscreen))
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{
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// Fall back to a smaller depth buffer
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// (The rendering may be ugly but this helps when running in VMware)
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SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
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if (!SetVideoMode(w, h, bpp, m_ConfigFullscreen))
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return false;
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}
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#if SDL_VERSION_ATLEAST(2, 0, 0)
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SDL_GL_SetSwapInterval(g_VSync ? 1 : 0);
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#endif
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// Work around a bug in the proprietary Linux ATI driver (at least versions 8.16.20 and 8.14.13).
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// The driver appears to register its own atexit hook on context creation.
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// If this atexit hook is called before SDL_Quit destroys the OpenGL context,
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// some kind of double-free problem causes a crash and lockup in the driver.
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// Calling SDL_Quit twice appears to be harmless, though, and avoids the problem
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// by destroying the context *before* the driver's atexit hook is called.
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// (Note that atexit hooks are guaranteed to be called in reverse order of their registration.)
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atexit(SDL_Quit);
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// End work around.
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ogl_Init(); // required after each mode change
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// (TODO: does that mean we need to call this when toggling fullscreen later?)
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#if SDL_VERSION_ATLEAST(2, 0, 0)
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u16 ramp[256];
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SDL_CalculateGammaRamp(g_Gamma, ramp);
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if (SDL_SetWindowGammaRamp(m_Window, ramp, ramp, ramp) < 0)
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LOGWARNING(L"SDL_SetGamma failed");
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#else
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# if OS_MACOSX
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// Workaround for crash on Mavericks, see http://trac.wildfiregames.com/ticket/2272
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int major, minor, bugfix;
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GetSystemVersion(major, minor, bugfix);
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if (minor < 9)
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{
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# endif
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if (SDL_SetGamma(g_Gamma, g_Gamma, g_Gamma) < 0)
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LOGWARNING(L"SDL_SetGamma failed");
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# if OS_MACOSX
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}
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# endif
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#endif
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m_IsInitialised = true;
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if (!m_ConfigFullscreen)
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{
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m_WindowedW = w;
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m_WindowedH = h;
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}
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return true;
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}
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bool CVideoMode::InitNonSDL()
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{
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ENSURE(!m_IsInitialised);
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ReadConfig();
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EnableS3TC();
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m_IsInitialised = true;
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return true;
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}
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void CVideoMode::Shutdown()
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{
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ENSURE(m_IsInitialised);
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m_IsFullscreen = false;
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m_IsInitialised = false;
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}
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void CVideoMode::EnableS3TC()
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{
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// On Linux we have to try hard to get S3TC compressed texture support.
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// If the extension is already provided by default, that's fine.
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// Otherwise we should enable the 'force_s3tc_enable' environment variable
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// and (re)initialise the video system, so that Mesa provides the extension
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// (if the driver at least supports decompression).
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// (This overrides the force_s3tc_enable specified via driconf files.)
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// Otherwise we should complain to the user, and stop using compressed textures.
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//
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// Setting the environment variable causes Mesa to print an ugly message to stderr
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// ("ATTENTION: default value of option force_s3tc_enable overridden by environment."),
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// so it'd be nicer to skip that if S3TC will be supported by default,
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// but reinitialising video is a pain (and it might do weird things when fullscreen)
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// so we just unconditionally set it (unless our config file explicitly disables it).
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#if !(OS_WIN || OS_MACOSX) // (assume Mesa is used for all non-Windows non-Mac platforms)
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if (m_ConfigForceS3TCEnable)
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setenv("force_s3tc_enable", "true", 0);
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#endif
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}
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bool CVideoMode::ResizeWindow(int w, int h)
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{
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ENSURE(m_IsInitialised);
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// Ignore if not windowed
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if (m_IsFullscreen)
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return true;
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// Ignore if the size hasn't changed
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if (w == m_WindowedW && h == m_WindowedH)
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return true;
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int bpp = GetBestBPP();
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if (!SetVideoMode(w, h, bpp, false))
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return false;
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m_WindowedW = w;
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m_WindowedH = h;
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UpdateRenderer(w, h);
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return true;
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}
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bool CVideoMode::SetFullscreen(bool fullscreen)
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{
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// This might get called before initialisation by psDisplayError;
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// if so then silently fail
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if (!m_IsInitialised)
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return false;
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// Check whether this is actually a change
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if (fullscreen == m_IsFullscreen)
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return true;
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if (!m_IsFullscreen)
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{
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// Windowed -> fullscreen:
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int w = 0, h = 0;
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// If a fullscreen size was configured, use that; else use the desktop size; else use a default
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if (m_ConfigFullscreen)
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{
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w = m_ConfigW;
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h = m_ConfigH;
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}
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if (w == 0 || h == 0)
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{
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w = m_PreferredW;
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h = m_PreferredH;
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}
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if (w == 0 || h == 0)
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{
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w = DEFAULT_FULLSCREEN_W;
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h = DEFAULT_FULLSCREEN_H;
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}
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int bpp = GetBestBPP();
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if (!SetVideoMode(w, h, bpp, fullscreen))
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return false;
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UpdateRenderer(m_CurrentW, m_CurrentH);
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return true;
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}
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else
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{
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// Fullscreen -> windowed:
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// Go back to whatever the previous window size was
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int w = m_WindowedW, h = m_WindowedH;
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int bpp = GetBestBPP();
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if (!SetVideoMode(w, h, bpp, fullscreen))
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return false;
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UpdateRenderer(w, h);
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return true;
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}
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}
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bool CVideoMode::ToggleFullscreen()
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{
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return SetFullscreen(!m_IsFullscreen);
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}
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void CVideoMode::UpdateRenderer(int w, int h)
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{
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if (w < 2) w = 2; // avoid GL errors caused by invalid sizes
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if (h < 2) h = 2;
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g_xres = w;
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g_yres = h;
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SViewPort vp = { 0, 0, w, h };
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if (CRenderer::IsInitialised())
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{
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g_Renderer.SetViewport(vp);
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g_Renderer.Resize(w, h);
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}
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if (g_GUI)
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g_GUI->UpdateResolution();
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if (g_Console)
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g_Console->UpdateScreenSize(w, h);
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if (g_Game)
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g_Game->GetView()->SetViewport(vp);
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}
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int CVideoMode::GetBestBPP()
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{
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if (m_ConfigBPP)
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return m_ConfigBPP;
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if (m_PreferredBPP)
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return m_PreferredBPP;
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return 32;
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}
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int CVideoMode::GetXRes()
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{
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ENSURE(m_IsInitialised);
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return m_CurrentW;
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}
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int CVideoMode::GetYRes()
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{
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ENSURE(m_IsInitialised);
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return m_CurrentH;
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}
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int CVideoMode::GetBPP()
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{
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ENSURE(m_IsInitialised);
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return m_CurrentBPP;
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}
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int CVideoMode::GetDesktopXRes()
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{
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ENSURE(m_IsInitialised);
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return m_PreferredW;
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}
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int CVideoMode::GetDesktopYRes()
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{
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ENSURE(m_IsInitialised);
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return m_PreferredH;
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}
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int CVideoMode::GetDesktopBPP()
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{
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ENSURE(m_IsInitialised);
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return m_PreferredBPP;
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}
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int CVideoMode::GetDesktopFreq()
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{
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ENSURE(m_IsInitialised);
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return m_PreferredFreq;
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}
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SDL_Window* CVideoMode::GetWindow()
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{
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ENSURE(m_IsInitialised);
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return m_Window;
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}
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