EGl-PBuffer

Supports the creation of off-screen pixel buffers (surfaces) for use with OpenGL ES. The implementation uses the EGL API which adapts OpenGL to the native windowing system.

Summary

EGl-PBuffer	Supports the creation of off-screen pixel buffers (surfaces) for use with OpenGL ES.
Copyright	This program is free software.
Files
C-kern/api/platform/OpenGL/EGL/eglpbuffer.h	Header file EGl-PBuffer.
C-kern/platform/OpenGL/EGL/eglpbuffer.c	Implementation file EGl-PBuffer impl.
Types
struct eglpbuffer_t	Export eglpbuffer_t into global namespace.
Functions
test
unittest_platform_opengl_egl_eglpbuffer	Test eglpbuffer_t functionality.
eglpbuffer_t	Points to an OpenGL pixel buffer.
lifetime
eglpbuffer_FREE	Static initializer.
init_eglpbuffer	Allocates a pixel buffer with size (width, height) in pixels and returns it in eglpbuf.
free_eglpbuffer	Frees all associated resources with eglpbuf.
query
size_eglpbuffer	Returns the width and height of eglpbuf in width and height.
configid_eglpbuffer	Returns the configuration ID of eglpbuf in configid.

Copyright

This program is free software. You can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

Author

Files

C-kern/api/platform/OpenGL/EGL/eglpbuffer.h

Header file EGl-PBuffer.

C-kern/platform/OpenGL/EGL/eglpbuffer.c

Implementation file EGl-PBuffer impl.

Types

struct eglpbuffer_t

Export eglpbuffer_t into global namespace.

Functions

Summary

test
unittest_platform_opengl_egl_eglpbuffer	Test eglpbuffer_t functionality.

test

unittest_platform_opengl_egl_eglpbuffer

int unittest_platform_opengl_egl_eglpbuffer( void )

Test eglpbuffer_t functionality.

eglpbuffer_t

typedef struct opengl_surface_t * eglpbuffer_t

Points to an OpenGL pixel buffer. The implementation uses os independent EGL API to create the context. OpenGL(ES) allows the binding of an off-screen pixel buffer to texture. This allows to render the content of the texture directly. This version of the EGL implementation does not support binding to a texture. ANother possibility

Summary

lifetime
eglpbuffer_FREE	Static initializer.
init_eglpbuffer	Allocates a pixel buffer with size (width, height) in pixels and returns it in eglpbuf.
free_eglpbuffer	Frees all associated resources with eglpbuf.
query
size_eglpbuffer	Returns the width and height of eglpbuf in width and height.
configid_eglpbuffer	Returns the configuration ID of eglpbuf in configid.

lifetime

eglpbuffer_FREE

#define eglpbuffer_FREE 0

Static initializer.

init_eglpbuffer

int init_eglpbuffer( /*out*/eglpbuffer_t * eglpbuf,
struct opengl_display_t * egldisp,
struct opengl_config_t * eglconf,
uint32_t width,
uint32_t height )

Allocates a pixel buffer with size (width, height) in pixels and returns it in eglpbuf. The parameter egldisp must be a valid egldisplay_t and eglconf must be a valid eglconfig_t with attribute gconfig_TYPE containing set bit gconfig_value_TYPE_PBUFFER_BIT.

free_eglpbuffer

int free_eglpbuffer( eglpbuffer_t * eglpbuf,
struct opengl_display_t * egldisp )

Frees all associated resources with eglpbuf. Make sure that the pixel buffer is not active in any thread before calling this function.

query

size_eglpbuffer

int size_eglpbuffer( const eglpbuffer_t eglpbuf,
struct opengl_display_t * egldisp,
/*out*/uint32_t * width,
/*out*/uint32_t * height )

Returns the width and height of eglpbuf in width and height.

configid_eglpbuffer

int configid_eglpbuffer( const eglpbuffer_t eglpbuf,
struct opengl_display_t * egldisp,
/*out*/uint32_t * configid )

Returns the configuration ID of eglpbuf in configid. Use id in a call to <initfromconfigid_eglconfig> for querying the configuration values assigned during creation of eglpbuf.