CameraRendererRGB565GL2 Class Reference

CameraRendererRGB565GL2 class provide functionality of rendering the camera image to the screen. More...

#include <CameraRendererRGB565GL2.h>

Public Member Functions
	CameraRendererRGB565GL2 (bool npotTextures=false)
	Basic Constructor.
bool	Render (const uint8_t *img, uint16_t w, uint16_t h)
	Renders provided camera image in NV21 format in current viewport.
float	GetRenderingFPS ()
	Returns GPU Rendering FPS for Camera frames.
bool	Init ()
	Initializes the object.
void	UnInit ()
	UnInitializes the object.
virtual	~CameraRendererRGB565GL2 ()
	Default desctructor.
	CameraRendererRGB565GL2 (bool npotTextures=false)
	Basic Constructor.
bool	Render (const uint8_t *img, uint16_t w, uint16_t h)
	Renders provided camera image in NV21 format in current viewport.
float	GetRenderingFPS ()
	Returns GPU Rendering FPS for Camera frames.
bool	Init ()
	Initializes the object.
void	UnInit ()
	UnInitializes the object.
virtual	~CameraRendererRGB565GL2 ()
	Default desctructor.
Protected Member Functions
bool	CreateTextures ()
	Creating 2D texture for an RGB565 image.
bool	UpdateTextures (const uint8_t *rgbImg, uint16_t w, uint16_t h)
	Updates texture with new input image.
bool	CreateShaderProgram ()
	Creates shader program required to render yuv texture.
bool	InitGPU ()
	Initializes the object.
bool	RenderGPURGB (const uint8_t *rgbImg, uint16_t w, uint16_t h)
	Renders texture in current viewport by provide RGB image to GPU.
bool	CreateTextures ()
	Creating 2D texture for an RGB565 image.
bool	UpdateTextures (const uint8_t *rgbImg, uint16_t w, uint16_t h)
	Updates texture with new input image.
bool	CreateShaderProgram ()
	Creates shader program required to render yuv texture.
bool	InitGPU ()
	Initializes the object.
bool	RenderGPURGB (const uint8_t *rgbImg, uint16_t w, uint16_t h)
	Renders texture in current viewport by provide RGB image to GPU.
Protected Attributes
bool	mInitialized
bool	mNPOTTextures
GLuint	mProgramObject
GLint	mGL_av4_PositionLoc
GLint	mGL_av2_TexCoordLoc
GLuint	mTextureId [1]
GLint	mGL_u_ImgRGBLoc
FPSCounter	mFPSCounter
GLuint	mWidth
GLuint	mHeight
Static Protected Attributes
static GLfloat	mVertices []
static const GLfloat	mLandscapeVertices []
static const GLfloat	mLandscapeReverseVertices []
static const GLfloat	mPortraitVertices []
static const GLfloat	mPortraitReverseVertices []

---

Detailed Description

CameraRendererRGB565GL2 class provide functionality of rendering the camera image to the screen.

CameraRendererRGB565GL2 support multiple modes for rendering. If the user is using any of the GPU based rendering mode, CameraRendererRGB565GL2 requires the caller to setup the OpenGL ES 2.0 context and set up the OpenGL view port in which to draw the camera image.

Usage: Usage of CameraRender is very simple as shown below.

//CameraRendererRGB565GL2 object needs to be created during //initialization time of your application.

CameraRendererRGB565GL2 camRenderer();

//In your OpenGL Rendering loop please call following //function.

camRenderer.Render(img, w,h);

---

Constructor & Destructor Documentation

CameraRendererRGB565GL2::CameraRendererRGB565GL2

(

bool

npotTextures = false

)

Basic Constructor.

Parameters:

npotTextures

Indicate if this renderer is to use non-power-of-two-textures or not. Default value is false.

CameraRendererRGB565GL2::CameraRendererRGB565GL2

(

bool

npotTextures = false

)

Basic Constructor.

Parameters:

npotTextures

Indicate if this renderer is to use non-power-of-two-textures or not. Default value is false.

---

Member Function Documentation

bool CameraRendererRGB565GL2::CreateShaderProgram

(

)

[protected]

Creates shader program required to render yuv texture.

Returns:

returns true if successfull false otherwise.

bool CameraRendererRGB565GL2::CreateShaderProgram

(

)

[protected]

Creates shader program required to render yuv texture.

Returns:

returns true if successfull false otherwise.

bool CameraRendererRGB565GL2::CreateTextures

(

)

[protected]

Creating 2D texture for an RGB565 image.

Returns:

returns true if successfull false otherwise.

bool CameraRendererRGB565GL2::CreateTextures

(

)

[protected]

Creating 2D texture for an RGB565 image.

Returns:

returns true if successfull false otherwise.

float CameraRendererRGB565GL2::GetRenderingFPS

(

)

Returns GPU Rendering FPS for Camera frames.

Returns:

Frames per Second.

float CameraRendererRGB565GL2::GetRenderingFPS

(

)

Returns GPU Rendering FPS for Camera frames.

Returns:

Frames per Second.

bool CameraRendererRGB565GL2::Init

(

)

Initializes the object.

Returns:

true if the object is initialized, false otherwise.

bool CameraRendererRGB565GL2::Init

(

)

Initializes the object.

Returns:

true if the object is initialized, false otherwise.

bool CameraRendererRGB565GL2::InitGPU

(

)

[protected]

Initializes the object.

Returns:

true if the object is initialized, false otherwise.

bool CameraRendererRGB565GL2::InitGPU

(

)

[protected]

Initializes the object.

Returns:

true if the object is initialized, false otherwise.

bool CameraRendererRGB565GL2::Render	(	const uint8_t *	img,
		uint16_t	w,
		uint16_t	h
	)

Renders provided camera image in NV21 format in current viewport.

Parameters:

img	Input image in NV21 format.
w	Width of input image.
h	Height of input image.

Returns:

true if rendering was successfull false otherwise.

bool CameraRendererRGB565GL2::Render	(	const uint8_t *	img,
		uint16_t	w,
		uint16_t	h
	)

Renders provided camera image in NV21 format in current viewport.

Parameters:

img	Input image in NV21 format.
w	Width of input image.
h	Height of input image.

Returns:

true if rendering was successfull false otherwise.

bool CameraRendererRGB565GL2::RenderGPURGB	(	const uint8_t *	rgbImg,
		uint16_t	w,
		uint16_t	h
	)		[protected]

Renders texture in current viewport by provide RGB image to GPU.

Parameters:

rgbImg	Input image in YUV420SP format.
w	Width of input image.
h	Height of input image.

Returns:

true if the rendering was successfull and false otherwise. If false see adb log for error messages from this class.

bool CameraRendererRGB565GL2::RenderGPURGB	(	const uint8_t *	rgbImg,
		uint16_t	w,
		uint16_t	h
	)		[protected]

Renders texture in current viewport by provide RGB image to GPU.

Parameters:

rgbImg	Input image in YUV420SP format.
w	Width of input image.
h	Height of input image.

Returns:

true if the rendering was successfull and false otherwise. If false see adb log for error messages from this class.

void CameraRendererRGB565GL2::UnInit

(

)

UnInitializes the object.

Releases any graphics resources held such as shader programs and textures.

void CameraRendererRGB565GL2::UnInit

(

)

UnInitializes the object.

Releases any graphics resources held such as shader programs and textures.

bool CameraRendererRGB565GL2::UpdateTextures	(	const uint8_t *	rgbImg,
		uint16_t	w,
		uint16_t	h
	)		[protected]

Updates texture with new input image.

Parameters:

rgbImg	input image in RGB565 format
w	Width of input image.
h	Height of input image.

Returns:

returns true if successfull false otherwise.

bool CameraRendererRGB565GL2::UpdateTextures	(	const uint8_t *	rgbImg,
		uint16_t	w,
		uint16_t	h
	)		[protected]

Updates texture with new input image.

Parameters:

rgbImg	input image in RGB565 format
w	Width of input image.
h	Height of input image.

Returns:

returns true if successfull false otherwise.

---

Field Documentation

FPSCounter CameraRendererRGB565GL2::mFPSCounter [protected]

FPS counter for Camera frame rendering.

GLint CameraRendererRGB565GL2::mGL_av2_TexCoordLoc [protected]

Location for OpenGL shader attribute for quad texture mapping.

GLint CameraRendererRGB565GL2::mGL_av4_PositionLoc [protected]

Location for OpenGL shader attribute for quad vertices.

GLint CameraRendererRGB565GL2::mGL_u_ImgRGBLoc [protected]

Location for OpenGL shader uniform for RGB Image sampler.

GLuint CameraRendererRGB565GL2::mHeight [protected]

Height

bool CameraRendererRGB565GL2::mInitialized [protected]

Flag indicating initialization status

static const GLfloat CameraRendererRGB565GL2::mLandscapeReverseVertices [static, protected]

Initial value:

 
{
   1.0f, -1.0f, 0.0f, 
   0.0f, 0.0f, 
   1.0f, 1.0f, 0.0f, 
   0.0f, 1.0f, 
   -1.0f, -1.0f, 0.0f, 
   1.0f, 0.0f, 
   -1.0f, 1.0f, 0.0f, 
   1.0f, 1.0f 
}

Reference vertex array for reverse landscape rendering

static const GLfloat CameraRendererRGB565GL2::mLandscapeVertices [static, protected]

Initial value:

 
{
   -1.0f, 1.0f, 0.0f, 
   0.0f, 0.0f, 
   -1.0f, -1.0f, 0.0f, 
   0.0f, 1.0f, 
   1.0f, 1.0f, 0.0f, 
   1.0f, 0.0f, 
   1.0f, -1.0f, 0.0f, 
   1.0f, 1.0f 
}

Reference vertex array for landscape rendering

bool CameraRendererRGB565GL2::mNPOTTextures [protected]

Flag indicating non-power-of-two texture support

static const GLfloat CameraRendererRGB565GL2::mPortraitReverseVertices [static, protected]

Initial value:

 
{
   -1.0f, -1.0f, 0.0f, 
   0.0f, 0.0f, 
   1.0f, -1.0f, 0.0f, 
   0.0f, 1.0f, 
   -1.0f, 1.0f, 0.0f, 
   1.0f, 0.0f, 
   1.0f, 1.0f, 0.0f, 
   1.0f, 1.0f 
}

Reference vertex array for reverse portrait rendering

static const GLfloat CameraRendererRGB565GL2::mPortraitVertices [static, protected]

Initial value:

 
{
   1.0f, 1.0f, 0.0f, 
   0.0f, 0.0f, 
   -1.0f, 1.0f, 0.0f, 
   0.0f, 1.0f, 
   1.0f, -1.0f, 0.0f, 
   1.0f, 0.0f, 
   -1.0f, -1.0f, 0.0f, 
   1.0f, 1.0f 
}

Reference vertex array for portrait rendering

GLuint CameraRendererRGB565GL2::mProgramObject [protected]

Compiled and Linked Shader Program object.

GLuint CameraRendererRGB565GL2::mTextureId [protected]

Array for texture ids. Either one or two of these array will be used depending rendering mode.

static GLfloat CameraRendererRGB565GL2::mVertices [static, protected]

Vertex Array used to define Quad for drawing and its texture mapping.

GLuint CameraRendererRGB565GL2::mWidth [protected]

Width

---

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

• fastcorner/jni/CameraRendererRGB565GL2.h
• fastcvdemo/jni/utils/CameraRendererRGB565GL2.h
• fastcorner/jni/CameraRendererRGB565GL2.cpp
• fastcvdemo/jni/utils/CameraRendererRGB565GL2.cpp