Helper class for managing EGL image resources. More...

#include <egl.h>

Public Member Functions
	eGLImage (uint32_t width, uint32_t height, uint32_t stride, GLenum texture_unit, uint32_t texture_unit_uniform_id)
	Construct an eGLImage with explicit stride.
	~eGLImage ()
	Destroy the eGLImage.

Public Attributes
uint32_t	width_
uint32_t	height_
uint32_t	stride_
uint32_t	offset_
uint32_t	framesize_
uint32_t	texture_unit_uniform_id_
GLenum	texture_unit_
GLuint	texture_
GLuint	fbo_
EGLImageKHR	image_

Detailed Description

Helper class for managing EGL image resources.

The eGLImage class encapsulates OpenGL ES texture and framebuffer objects along with their associated EGL image. It aggregates handles, descriptors, and routines for managing textures that can be associated with shader uniform IDs.

This class is particularly useful for managing DMA-BUF backed textures in zero-copy rendering pipelines, where textures are bound to specific texture units and can be used as both input textures and render targets.

Constructor & Destructor Documentation

◆ eGLImage()

libcamera::eGLImage::eGLImage	(	uint32_t	width,
		uint32_t	height,
		uint32_t	stride,
		GLenum	texture_unit,
		uint32_t	texture_unit_uniform_id )

inline

Construct an eGLImage with explicit stride.

Parameters

[in]	width	Image width in pixels
[in]	height	Image height in pixels
[in]	stride	Row stride in bytes
[in]	texture_unit	OpenGL texture unit
[in]	texture_unit_uniform_id	Shader uniform ID

◆ ~eGLImage()

libcamera::eGLImage::~eGLImage ( )

inline

Destroy the eGLImage.

Cleans up OpenGL resources by deleting the framebuffer object and texture.

Member Data Documentation

◆ fbo_

GLuint libcamera::eGLImage::fbo_

OpenGL frame buffer object ID

◆ framesize_

uint32_t libcamera::eGLImage::framesize_

Total frame size in bytes (stride * height)

◆ height_

uint32_t libcamera::eGLImage::height_

Image height in pixels

◆ image_

EGLImageKHR libcamera::eGLImage::image_

EGL Image handle

◆ offset_

uint32_t libcamera::eGLImage::offset_

Buffer offset (reserved for future use)

◆ stride_

uint32_t libcamera::eGLImage::stride_

Row stride in bytes

◆ texture_

GLuint libcamera::eGLImage::texture_

OpenGL texture object ID

◆ texture_unit_

GLenum libcamera::eGLImage::texture_unit_

Texture unit associated with this image eg (GL_TEXTURE0)

◆ texture_unit_uniform_id_

uint32_t libcamera::eGLImage::texture_unit_uniform_id_

Shader uniform id for texture unit

◆ width_

uint32_t libcamera::eGLImage::width_

Image width in pixels

The documentation for this class was generated from the following file:

include/libcamera/internal/egl.h

Public Member Functions

Public Attributes