GL Image Interface

Detailed Description

Defines GL image abstractions, and streamer and format conversion APIs.

Data Structures
struct	dwImageGL
	Defines a GL texture image. More...

Functions
DW_VIZ_API_PUBLIC dwStatus	dwImage_createAndBindBufferGL (dwImageHandle_t *image, dwImageProperties properties, void *buffersIn[DW_MAX_IMAGE_PLANES], size_t pitches[DW_MAX_IMAGE_PLANES], size_t bufferCount, dwContextHandle_t ctx)
	Works only with DW_IMAGE_GL and DW_IMAGE_LAYOUT_BLOCK (or DEFAULT) memory layout, in which case the buffer passed is a cpu memory pointer and the content is uploaded onto the GPU as a GL texture. More...
DW_VIZ_API_PUBLIC dwStatus	dwImage_createAndBindTexture (dwImageHandle_t *image, dwImageProperties properties, GLenum texID, GLenum target)
	Creates a dwImageHandle_t based on the properties passed and binds a GL texture to it. More...
DW_VIZ_API_PUBLIC dwStatus	dwImage_createGL (dwImageHandle_t *image, dwImageProperties properties, dwContextHandle_t ctx)
	Creates and allocates resources for a dwImageHandle_t based on the properties passed as input. More...
DW_VIZ_API_PUBLIC dwStatus	dwImage_getGL (dwImageGL **imageGL, dwImageHandle_t image)
	Retrieves the dwImageGL of a dwImageHandle_t. More...

---

Data Structure Documentation

dwImageGL

struct dwImageGL

Data Fields
dwImageProperties	prop	Specifies the properties of the image. Note prop.type is always DW_IMAGE_GL and would have to be casted accordingly
GLenum	target	Specifies the OpenGL texture target.
GLuint	tex	Specifies the OpenGL texture handle.
dwTime_t	timestamp_us	Specifies the time, in microseconds, when the image was acquired.

Function Documentation

dwImage_createAndBindBufferGL()

DW_VIZ_API_PUBLIC dwStatus dwImage_createAndBindBufferGL	(	dwImageHandle_t *	image,
		dwImageProperties	properties,
		void *	buffersIn[DW_MAX_IMAGE_PLANES],
		size_t	pitches[DW_MAX_IMAGE_PLANES],
		size_t	bufferCount,
		dwContextHandle_t	ctx
	)

Works only with DW_IMAGE_GL and DW_IMAGE_LAYOUT_BLOCK (or DEFAULT) memory layout, in which case the buffer passed is a cpu memory pointer and the content is uploaded onto the GPU as a GL texture.

Given that this implies a change in domain and device, the ownership of the original buffer remains to the user and the image allocates its own memory onto the GPU.

Parameters

[out]	image	A handle to the image
[in]	properties	The image properties.
[in]	buffersIn	An array of pointers to individual buffers.
[in]	pitches	An array of pitches for each buffer.
[in]	bufferCount	The number of buffers (maximum is DW_MAX_IMAGE_PLANES).
[in]	ctx	The DriveWorksGL context.

Returns

DW_SUCCESS if the image was created,
DW_INVALID_ARGUMENT if the given image properties are invalid or the image pointer is null,
DW_INVALID_HANDLE if the given context handle is invalid,

dwImage_createAndBindTexture()

DW_VIZ_API_PUBLIC dwStatus dwImage_createAndBindTexture	(	dwImageHandle_t *	image,
		dwImageProperties	properties,
		GLenum	texID,
		GLenum	target
	)

Creates a dwImageHandle_t based on the properties passed and binds a GL texture to it.

Valid only for types of DW_IMAGE_GL with DW_IMAGE_LAYOUT_BLOCK layout

Parameters

[out]	image	A handle to the image
[in]	properties	The image properties.
[in]	texID	The id of the gl texture
[in]	target	The number of buffers (maximum is DW_MAX_IMAGE_PLANES).

Returns

DW_SUCCESS if the image was created,
DW_INVALID_ARGUMENT if the given image types is invalid,

dwImage_createGL()

DW_VIZ_API_PUBLIC dwStatus dwImage_createGL	(	dwImageHandle_t *	image,
		dwImageProperties	properties,
		dwContextHandle_t	ctx
	)

Creates and allocates resources for a dwImageHandle_t based on the properties passed as input.

Parameters

[out]	image	A handle to the image
[in]	properties	The image properties.
[in]	ctx	The DriveWorksGL context.

Returns

DW_SUCCESS if the image was created,
DW_INVALID_ARGUMENT if the given image types are invalid or the streamer pointer is null,
DW_INVALID_HANDLE if the given context handle is invalid,

Note

This method can only create GL images and will ignore any type set in the properties.

dwImage_getGL()

DW_VIZ_API_PUBLIC dwStatus dwImage_getGL	(	dwImageGL **	imageGL,
		dwImageHandle_t	image
	)

Retrieves the dwImageGL of a dwImageHandle_t.

The image must have been created as a DW_IMAGE_GL type Note that any modification to the image retrieved will modify the content of the original handle

Parameters

[out]	imageGL	A pointer to the dwImageGL pointer
[in]	image	A handle to the image

Returns

DW_SUCCESS if the dwImageGL is successfully retrieved,
DW_INVALID_ARGUMENT if the given image pointer or image handle is null,
DW_INVALID_HANDLE if the given image handle is invalid,