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https://github.com/dolphin-emu/dolphin.git
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c82be53d5c
The SGI extension does not define calling SwapInterval with a parameter of zero as valid. It was just lucky that drivers interpreted this as vsync off. The EXT_swap_control extension defines zero as a valid value. Mesa does not appear to support the EXT variant, so we fall back to MESA_swap_control here, which also supports zero.
317 lines
9.2 KiB
C++
317 lines
9.2 KiB
C++
// Copyright 2012 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include <array>
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#include <sstream>
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#include "Common/GL/GLInterface/GLX.h"
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#include "Common/Logging/Log.h"
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#define GLX_CONTEXT_MAJOR_VERSION_ARB 0x2091
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#define GLX_CONTEXT_MINOR_VERSION_ARB 0x2092
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typedef GLXContext (*PFNGLXCREATECONTEXTATTRIBSPROC)(Display*, GLXFBConfig, GLXContext, Bool,
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const int*);
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typedef void (*PFNGLXSWAPINTERVALEXTPROC)(Display*, GLXDrawable, int);
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typedef int (*PFNGLXSWAPINTERVALMESAPROC)(unsigned int);
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static PFNGLXCREATECONTEXTATTRIBSPROC glXCreateContextAttribs = nullptr;
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static PFNGLXSWAPINTERVALEXTPROC glXSwapIntervalEXTPtr = nullptr;
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static PFNGLXSWAPINTERVALMESAPROC glXSwapIntervalMESAPtr = nullptr;
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static PFNGLXCREATEGLXPBUFFERSGIXPROC glXCreateGLXPbufferSGIX = nullptr;
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static PFNGLXDESTROYGLXPBUFFERSGIXPROC glXDestroyGLXPbufferSGIX = nullptr;
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static bool s_glxError;
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static int ctxErrorHandler(Display* dpy, XErrorEvent* ev)
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{
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s_glxError = true;
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return 0;
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}
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void cInterfaceGLX::SwapInterval(int Interval)
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{
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if (!m_has_handle)
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return;
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// Try EXT_swap_control, then MESA_swap_control.
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if (glXSwapIntervalEXTPtr)
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glXSwapIntervalEXTPtr(dpy, win, Interval);
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else if (glXSwapIntervalMESAPtr)
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glXSwapIntervalMESAPtr(static_cast<unsigned int>(Interval));
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else
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ERROR_LOG(VIDEO, "No support for SwapInterval (framerate clamped to monitor refresh rate).");
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}
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void* cInterfaceGLX::GetFuncAddress(const std::string& name)
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{
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return (void*)glXGetProcAddress((const GLubyte*)name.c_str());
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}
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void cInterfaceGLX::Swap()
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{
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glXSwapBuffers(dpy, win);
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}
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// Create rendering window.
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// Call browser: Core.cpp:EmuThread() > main.cpp:Video_Initialize()
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bool cInterfaceGLX::Create(void* window_handle, bool stereo, bool core)
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{
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m_has_handle = !!window_handle;
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m_host_window = (Window)window_handle;
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dpy = XOpenDisplay(nullptr);
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int screen = DefaultScreen(dpy);
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// checking glx version
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int glxMajorVersion, glxMinorVersion;
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glXQueryVersion(dpy, &glxMajorVersion, &glxMinorVersion);
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if (glxMajorVersion < 1 || (glxMajorVersion == 1 && glxMinorVersion < 4))
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{
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ERROR_LOG(VIDEO, "glX-Version %d.%d detected, but need at least 1.4", glxMajorVersion,
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glxMinorVersion);
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return false;
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}
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// loading core context creation function
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glXCreateContextAttribs =
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(PFNGLXCREATECONTEXTATTRIBSPROC)GetFuncAddress("glXCreateContextAttribsARB");
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if (!glXCreateContextAttribs)
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{
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ERROR_LOG(VIDEO,
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"glXCreateContextAttribsARB not found, do you support GLX_ARB_create_context?");
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return false;
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}
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// choosing framebuffer
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int visual_attribs[] = {GLX_X_RENDERABLE,
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True,
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GLX_DRAWABLE_TYPE,
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GLX_WINDOW_BIT,
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GLX_X_VISUAL_TYPE,
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GLX_TRUE_COLOR,
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GLX_RED_SIZE,
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8,
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GLX_GREEN_SIZE,
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8,
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GLX_BLUE_SIZE,
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8,
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GLX_DEPTH_SIZE,
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0,
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GLX_STENCIL_SIZE,
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0,
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GLX_DOUBLEBUFFER,
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True,
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GLX_STEREO,
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stereo ? True : False,
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None};
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int fbcount = 0;
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GLXFBConfig* fbc = glXChooseFBConfig(dpy, screen, visual_attribs, &fbcount);
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if (!fbc || !fbcount)
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{
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ERROR_LOG(VIDEO, "Failed to retrieve a framebuffer config");
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return false;
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}
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fbconfig = *fbc;
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XFree(fbc);
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s_glxError = false;
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XErrorHandler oldHandler = XSetErrorHandler(&ctxErrorHandler);
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// Create a GLX context.
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// We try to get a 4.0 core profile, else we try 3.3, else try it with anything we get.
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std::array<int, 9> context_attribs = {
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{GLX_CONTEXT_MAJOR_VERSION_ARB, 4, GLX_CONTEXT_MINOR_VERSION_ARB, 0,
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GLX_CONTEXT_PROFILE_MASK_ARB, GLX_CONTEXT_CORE_PROFILE_BIT_ARB, GLX_CONTEXT_FLAGS_ARB,
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GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB, None}};
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ctx = nullptr;
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if (core)
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{
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ctx = glXCreateContextAttribs(dpy, fbconfig, 0, True, &context_attribs[0]);
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XSync(dpy, False);
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m_attribs.insert(m_attribs.end(), context_attribs.begin(), context_attribs.end());
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}
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if (core && (!ctx || s_glxError))
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{
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std::array<int, 9> context_attribs_33 = {
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{GLX_CONTEXT_MAJOR_VERSION_ARB, 3, GLX_CONTEXT_MINOR_VERSION_ARB, 3,
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GLX_CONTEXT_PROFILE_MASK_ARB, GLX_CONTEXT_CORE_PROFILE_BIT_ARB, GLX_CONTEXT_FLAGS_ARB,
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GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB, None}};
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s_glxError = false;
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ctx = glXCreateContextAttribs(dpy, fbconfig, 0, True, &context_attribs_33[0]);
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XSync(dpy, False);
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m_attribs.clear();
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m_attribs.insert(m_attribs.end(), context_attribs_33.begin(), context_attribs_33.end());
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}
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if (!ctx || s_glxError)
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{
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std::array<int, 5> context_attribs_legacy = {
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{GLX_CONTEXT_MAJOR_VERSION_ARB, 1, GLX_CONTEXT_MINOR_VERSION_ARB, 0, None}};
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s_glxError = false;
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ctx = glXCreateContextAttribs(dpy, fbconfig, 0, True, &context_attribs_legacy[0]);
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XSync(dpy, False);
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m_attribs.clear();
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m_attribs.insert(m_attribs.end(), context_attribs_legacy.begin(), context_attribs_legacy.end());
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}
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if (!ctx || s_glxError)
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{
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ERROR_LOG(VIDEO, "Unable to create GL context.");
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XSetErrorHandler(oldHandler);
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return false;
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}
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glXSwapIntervalEXTPtr = nullptr;
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glXSwapIntervalMESAPtr = nullptr;
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glXCreateGLXPbufferSGIX = nullptr;
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glXDestroyGLXPbufferSGIX = nullptr;
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m_supports_pbuffer = false;
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std::string tmp;
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std::istringstream buffer(glXQueryExtensionsString(dpy, screen));
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while (buffer >> tmp)
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{
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if (tmp == "GLX_SGIX_pbuffer")
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{
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glXCreateGLXPbufferSGIX = reinterpret_cast<PFNGLXCREATEGLXPBUFFERSGIXPROC>(
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GetFuncAddress("glXCreateGLXPbufferSGIX"));
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glXDestroyGLXPbufferSGIX = reinterpret_cast<PFNGLXDESTROYGLXPBUFFERSGIXPROC>(
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GetFuncAddress("glXDestroyGLXPbufferSGIX"));
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m_supports_pbuffer = glXCreateGLXPbufferSGIX && glXDestroyGLXPbufferSGIX;
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}
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else if (tmp == "GLX_EXT_swap_control")
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{
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glXSwapIntervalEXTPtr =
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reinterpret_cast<PFNGLXSWAPINTERVALEXTPROC>(GetFuncAddress("glXSwapIntervalEXT"));
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}
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else if (tmp == "GLX_MESA_swap_control")
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{
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glXSwapIntervalMESAPtr =
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reinterpret_cast<PFNGLXSWAPINTERVALMESAPROC>(GetFuncAddress("glXSwapIntervalMESA"));
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}
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}
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if (!CreateWindowSurface())
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{
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ERROR_LOG(VIDEO, "Error: CreateWindowSurface failed\n");
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XSetErrorHandler(oldHandler);
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return false;
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}
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XSetErrorHandler(oldHandler);
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return true;
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}
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bool cInterfaceGLX::Create(cInterfaceBase* main_context)
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{
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cInterfaceGLX* glx_context = static_cast<cInterfaceGLX*>(main_context);
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m_has_handle = false;
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m_supports_pbuffer = glx_context->m_supports_pbuffer;
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dpy = glx_context->dpy;
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fbconfig = glx_context->fbconfig;
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s_glxError = false;
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XErrorHandler oldHandler = XSetErrorHandler(&ctxErrorHandler);
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ctx = glXCreateContextAttribs(dpy, fbconfig, glx_context->ctx, True, &glx_context->m_attribs[0]);
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XSync(dpy, False);
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if (!ctx || s_glxError)
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{
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ERROR_LOG(VIDEO, "Unable to create GL context.");
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XSetErrorHandler(oldHandler);
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return false;
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}
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if (m_supports_pbuffer && !CreateWindowSurface())
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{
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ERROR_LOG(VIDEO, "Error: CreateWindowSurface failed\n");
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XSetErrorHandler(oldHandler);
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return false;
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}
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XSetErrorHandler(oldHandler);
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return true;
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}
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std::unique_ptr<cInterfaceBase> cInterfaceGLX::CreateSharedContext()
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{
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std::unique_ptr<cInterfaceBase> context = std::make_unique<cInterfaceGLX>();
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if (!context->Create(this))
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return nullptr;
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return context;
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}
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bool cInterfaceGLX::CreateWindowSurface()
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{
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if (m_has_handle)
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{
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// Get an appropriate visual
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XVisualInfo* vi = glXGetVisualFromFBConfig(dpy, fbconfig);
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XWindow.Initialize(dpy);
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XWindowAttributes attribs;
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if (!XGetWindowAttributes(dpy, m_host_window, &attribs))
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{
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ERROR_LOG(VIDEO, "Window attribute retrieval failed");
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return false;
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}
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s_backbuffer_width = attribs.width;
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s_backbuffer_height = attribs.height;
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win = XWindow.CreateXWindow(m_host_window, vi);
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XFree(vi);
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}
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else if (m_supports_pbuffer)
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{
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win = m_pbuffer = glXCreateGLXPbufferSGIX(dpy, fbconfig, 1, 1, nullptr);
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if (!m_pbuffer)
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return false;
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}
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return true;
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}
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void cInterfaceGLX::DestroyWindowSurface()
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{
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if (m_has_handle)
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{
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XWindow.DestroyXWindow();
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}
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else if (m_supports_pbuffer && m_pbuffer)
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{
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glXDestroyGLXPbufferSGIX(dpy, m_pbuffer);
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m_pbuffer = 0;
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}
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}
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bool cInterfaceGLX::MakeCurrent()
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{
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return glXMakeCurrent(dpy, win, ctx);
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}
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bool cInterfaceGLX::ClearCurrent()
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{
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return glXMakeCurrent(dpy, None, nullptr);
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}
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// Close backend
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void cInterfaceGLX::Shutdown()
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{
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DestroyWindowSurface();
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if (ctx)
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{
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glXDestroyContext(dpy, ctx);
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// Don't close the display connection if we are a shared context.
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// Saves doing reference counting on this object, and the main context will always
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// be shut down last anyway.
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if (m_has_handle)
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{
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XCloseDisplay(dpy);
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ctx = nullptr;
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}
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}
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}
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