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dolphin/Source/Core/Common/GL/GLInterface/GLX.cpp

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