bastien/Linux-VR-Compositor-Dev
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Add context creation helper function

Browse Source
This commit is contained in:
Bastien
2018-09-21 13:04:19 +02:00
parent 2d1c914ca1
commit 547d9ccaa2
2 changed files with 70 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
examples/opengl/CMakeLists.txt
View File

@@ -3,7 +3,7 @@ set(OpenGL_GL_PREFERENCE GLVND)
find_package(OpenGL REQUIRED)
find_package(OpenHMD REQUIRED)
add_executable(openglexample gl.c gl.h main.c vr_context.c vr_context.h)
add_executable(openglexample gl.c gl.h main.c vr_context.c vr_context.h context.inl)
target_include_directories(openglexample PRIVATE ${OPENGL_INCLUDE_DIRS})
target_link_libraries(openglexample PRIVATE ${OPENGL_LIBRARIES})
target_link_libraries(openglexample PRIVATE m)

69
examples/opengl/context.inl Normal file
View File

@@ -0,0 +1,69 @@
#include <EGL/egl.h>
#include <stdbool.h>
static inline bool create_context(EGLNativeDisplayType nativeDisplay, EGLNativeWindowType nativeWindow, const EGLint * config_attribs, const EGLint * context_attribs, const EGLint * surface_attribs, EGLDisplay * outDisplay, EGLContext * outContext, EGLSurface * outSurface)
{
//
// get an EGL display connection
EGLDisplay display = eglGetDisplay(nativeDisplay);
if (EGL_NO_DISPLAY == display)
{
return false;
}
//
// initialize the EGL display connection
EGLint major, minor;
if (!eglInitialize(display, &major, &minor))
{
return false;
}
//
// bind OpenGL API
eglBindAPI(EGL_OPENGL_API);
//
// get an appropriate EGL frame buffer configuration
EGLint num_config;
EGLConfig configs[128];
if (!eglChooseConfig(display, config_attribs, configs, 128, &num_config))
{
return false;
}
EGLConfig config = configs[0]; // FIXME
//
// create context
EGLContext context = eglCreateContext(display, config, EGL_NO_CONTEXT, context_attribs);
if (EGL_NO_CONTEXT == context)
{
return false;
}
//
// Create Surface
EGLSurface surface = eglCreateWindowSurface(display, config, nativeWindow, surface_attribs);
if (EGL_NO_SURFACE == surface)
{
return false;
}
//
// Set current context
if (!eglMakeCurrent(display, surface, surface, context))
{
return false;
}
*outDisplay = display;
*outContext = context;
*outSurface = surface;
return true;
}