dolphin/Source/Core/VideoBackends/OGL/GLInterface/GLX.cpp

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// Copyright 2014 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
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#include <string>
#include "VideoBackends/OGL/GLInterface/GLX.h"
#include "VideoCommon/RenderBase.h"
#include "VideoCommon/VideoConfig.h"
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typedef int ( * PFNGLXSWAPINTERVALSGIPROC) (int interval);
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static PFNGLXSWAPINTERVALSGIPROC glXSwapIntervalSGI = nullptr;
void cInterfaceGLX::SwapInterval(int Interval)
{
if (glXSwapIntervalSGI)
glXSwapIntervalSGI(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());
}
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void cInterfaceGLX::Swap()
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{
glXSwapBuffers(dpy, win);
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}
// Create rendering window.
// Call browser: Core.cpp:EmuThread() > main.cpp:Video_Initialize()
bool cInterfaceGLX::Create(void *window_handle)
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{
int glxMajorVersion, glxMinorVersion;
// attributes for a single buffered visual in RGBA format with at least
// 8 bits per color
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int attrListSgl[] = {GLX_RGBA, GLX_RED_SIZE, 8,
GLX_GREEN_SIZE, 8,
GLX_BLUE_SIZE, 8,
None};
// attributes for a double buffered visual in RGBA format with at least
// 8 bits per color
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int attrListDbl[] = {GLX_RGBA, GLX_DOUBLEBUFFER,
GLX_RED_SIZE, 8,
GLX_GREEN_SIZE, 8,
GLX_BLUE_SIZE, 8,
None };
int attrListDefault[] = {
GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_DOUBLEBUFFER,
None };
dpy = XOpenDisplay(nullptr);
int screen = DefaultScreen(dpy);
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glXQueryVersion(dpy, &glxMajorVersion, &glxMinorVersion);
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NOTICE_LOG(VIDEO, "glX-Version %d.%d", glxMajorVersion, glxMinorVersion);
// Get an appropriate visual
vi = glXChooseVisual(dpy, screen, attrListDbl);
if (vi == nullptr)
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{
vi = glXChooseVisual(dpy, screen, attrListSgl);
if (vi != nullptr)
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{
ERROR_LOG(VIDEO, "Only single buffered visual!");
}
else
{
vi = glXChooseVisual(dpy, screen, attrListDefault);
if (vi == nullptr)
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{
ERROR_LOG(VIDEO, "Could not choose visual (glXChooseVisual)");
return false;
}
}
}
else
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{
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NOTICE_LOG(VIDEO, "Got double buffered visual!");
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}
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// Create a GLX context.
ctx = glXCreateContext(dpy, vi, nullptr, GL_TRUE);
if (!ctx)
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{
PanicAlert("Unable to create GLX context.");
return false;
}
XWindow.Initialize(dpy);
Window parent = (Window)window_handle;
XWindowAttributes attribs;
if (!XGetWindowAttributes(dpy, parent, &attribs))
{
ERROR_LOG(VIDEO, "Window attribute retrieval failed");
return false;
}
s_backbuffer_width = attribs.width;
s_backbuffer_height = attribs.height;
win = XWindow.CreateXWindow(parent, vi);
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return true;
}
bool cInterfaceGLX::MakeCurrent()
{
bool success = glXMakeCurrent(dpy, win, ctx);
if (success)
{
// load this function based on the current bound context
glXSwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC)GLInterface->GetFuncAddress("glXSwapIntervalSGI");
}
return success;
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}
bool cInterfaceGLX::ClearCurrent()
{
return glXMakeCurrent(dpy, None, nullptr);
}
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// Close backend
void cInterfaceGLX::Shutdown()
{
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XWindow.DestroyXWindow();
if (ctx)
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{
glXDestroyContext(dpy, ctx);
XCloseDisplay(dpy);
ctx = nullptr;
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}
}