EGL 1.4 library
Introduction
The Khronos Native Platform Graphics Interface (EGL) is an open standard developed by the Khronos Group. It provides an interface between rendering APIs (for example OpenGL ES) and an underlying native platform window system. With EGL, the user can create interfaces onto which client APIs can draw, create graphics contexts, and synchronize drawing.
To learn more, see Khronos EGL API Registry info page.
List of functions in EGL 1.4
Errors
| Name | Content |
|---|---|
| eglGetError |
Returns error information eglGetError function can return several different error codes which describe the type of the error. Error code EGL_SUCCESS is returned when the function is successed. |
Initialisation
| Name | Content |
|---|---|
| eglGetDisplay |
Returns an EGL display connection |
| eglInitialize |
Initialises an EGL display connection |
| eglTerminate |
Terminates an EGL display connection |
EGL Versioning
| Name | Content |
|---|---|
| eglQueryString |
Returns a pointer to a static, zero-terminated string describing the EGL implementation running on the specified display |
Configuration management
| Name | Content |
|---|---|
| eglGetConfigs |
Returns a list of all EGL frame buffer configurations for a specific display |
| eglChooseConfig |
Returns a list of EGL frame buffer configurations that match specified attributes |
| eglGetConfigAttrib |
Returns the value of an EGLConfig attribute |
Rendering surfaces
| Name | Content |
|---|---|
| eglCreateWindowSurface |
Creates an onscreen EGL window surface |
| eglCreatePbufferSurface |
Creates a new EGL pixel buffer (pbuffer) surface |
| eglCreatePbufferFromClientBuffer |
Creates a new EGL pixel buffer surface bound to an OpenVG image |
| eglCreatePixmapSurface |
Creates a new EGL pixmap surface |
| eglDestroySurface |
Destroys an EGL surface |
| eglSurfaceAttrib |
Sets an EGL surface attribute |
| eglQuerySurface |
Returns EGL surface information |
Rendering to textures
| Name | Content |
|---|---|
| eglBindTexImage |
Defines a two-dimensional texture image |
| eglReleaseTexImage |
Releases a color buffer that is being used as a texture |
Rendering contexts
| Name | Content |
|---|---|
| eglBindAPI |
Sets the current rendering API |
| eglQueryAPI |
Queries the current rendering API |
| eglCreateContext |
Creates a new EGL rendering context |
| eglDestroyContext |
Destroys an EGL rendering context |
| eglMakeCurrent |
Attaches an EGL rendering context to EGL surfaces |
| eglGetCurrentContext |
Returns the current EGL rendering context |
| eglGetCurrentSurface |
Returns the read or draw surface for the current EGL rendering context |
| eglGetCurrentDisplay |
Returns the display for the current EGL rendering context |
| eglQueryContext |
Returns EGL rendering context information |
Synchronisation primitives
| Name | Content |
|---|---|
| eglWaitClient |
Completes client API execution prior to subsequent native rendering calls |
| eglWaitGL |
Complete GL execution prior to subsequent native rendering calls |
| eglWaitNative |
Complete native execution prior to subsequent GL rendering calls |
Posting the colour buffer
| Name | Content |
|---|---|
| eglSwapBuffers |
Posts EGL surface color buffer to a native window |
| eglCopyBuffers |
Copies EGL surface color buffer to a native pixmap |
| eglSwapInterval |
Specifies the minimum number of video frame periods per buffer swap for the window associated with the current context |
Obtaining extension function pointers
| Name | Content |
|---|---|
| eglGetProcAddress |
Returns a GL or an EGL extension function |
Releasing thread state
| Name | Content |
|---|---|
| eglReleaseThread |
Releases EGL per-thread state |