#include "RaspiTexUtil.h"
#include "RaspiTex.h"
#include <bcm_host.h>
#include <GLES2/gl2.h>

Functions
void	raspitexutil_gl_term (RASPITEX_STATE *raspitex_state)

int	raspitexutil_create_native_window (RASPITEX_STATE *raspitex_state)

void	raspitexutil_destroy_native_window (RASPITEX_STATE *raspitex_state)

int	raspitexutil_create_textures (RASPITEX_STATE *raspitex_state)

int	raspitexutil_gl_init_1_0 (RASPITEX_STATE *raspitex_state)

int	raspitexutil_gl_init_2_0 (RASPITEX_STATE *raspitex_state)

int	raspitexutil_do_update_texture (EGLDisplay display, EGLenum target, EGLClientBuffer mm_buf, GLuint texture, EGLImageKHR egl_image)

int	raspitexutil_update_texture (RASPITEX_STATE *raspitex_state, EGLClientBuffer mm_buf)

int	raspitexutil_update_y_texture (RASPITEX_STATE *raspitex_state, EGLClientBuffer mm_buf)

int	raspitexutil_update_u_texture (RASPITEX_STATE *raspitex_state, EGLClientBuffer mm_buf)

int	raspitexutil_update_v_texture (RASPITEX_STATE *raspitex_state, EGLClientBuffer mm_buf)

int	raspitexutil_update_model (RASPITEX_STATE *raspitex_state)

int	raspitexutil_redraw (RASPITEX_STATE *raspitex_state)

void	raspitexutil_close (RASPITEX_STATE *raspitex_state)

void	raspitexutil_brga_to_rgba (uint8_t *buffer, size_t size)

int	raspitexutil_capture_bgra (RASPITEX_STATE state, uint8_t buffer, size_t buffer_size)

int	raspitexutil_build_shader_program (RASPITEXUTIL_SHADER_PROGRAM_T *p)

Variables
VCOS_LOG_CAT_T	raspitex_log_category

Detailed Description

Provides default implementations for the raspitex_scene_ops functions and general utility functions.

Function Documentation

void raspitexutil_brga_to_rgba	(	uint8_t *	buffer,
		size_t	size
	)

Performs an in-place byte swap from BGRA to RGBA.

Parameters

buffer	The buffer to modify.
size	Size of the buffer in bytes.

int raspitexutil_build_shader_program ( RASPITEXUTIL_SHADER_PROGRAM_T * p )

Takes a description of shader program, compiles it and gets the locations of uniforms and attributes.

Parameters

p	The shader program state.

Returns: Zero if successful.

int raspitexutil_capture_bgra	(	RASPITEX_STATE *	state,
		uint8_t **	buffer,
		size_t *	buffer_size
	)

Uses glReadPixels to grab the current frame-buffer contents and returns the result in a newly allocate buffer along with the its size. Data is returned in BGRA format for TGA output. PPM output doesn't require the channel order swap but would require a vflip. The TGA format also supports alpha. The byte swap is not done in this function to avoid blocking the GL rendering thread.

Parameters

state	Pointer to the GL preview state.
buffer	Address of pointer to set to pointer to new buffer.
buffer_size	The size of the new buffer in bytes (out param)

Returns: Zero if successful.

void raspitexutil_close ( RASPITEX_STATE * raspitex_state )

Default is a no-op

Parameters

raspitex_state A pointer to the GL preview state.

int raspitexutil_create_native_window ( RASPITEX_STATE * raspitex_state )

Creates a native window for the GL surface using dispmanx

Parameters

raspitex_state A pointer to the GL preview state.

Returns: Zero if successful, otherwise, -1 is returned.

void raspitexutil_destroy_native_window ( RASPITEX_STATE * raspitex_state )

Destroys the pools of buffers used by the GL renderer.

Parameters

raspitex_state A pointer to the GL preview state.

int raspitexutil_do_update_texture	(	EGLDisplay	display,
		EGLenum	target,
		EGLClientBuffer	mm_buf,
		GLuint *	texture,
		EGLImageKHR *	egl_image
	)

Advances the texture and EGL image to the next MMAL buffer.

Parameters

display	The EGL display.
target	The EGL image target e.g. EGL_IMAGE_BRCM_MULTIMEDIA
mm_buf	The EGL client buffer (mmal opaque buffer) that is used to create the EGL Image for the preview texture.
egl_image	Pointer to the EGL image to update with mm_buf.
texture	Pointer to the texture to update from EGL image.

Returns: Zero if successful.

int raspitexutil_gl_init_1_0 ( RASPITEX_STATE * raspitex_state )

Creates an OpenGL ES 1.X context.

Parameters

raspitex_state A pointer to the GL preview state.

Returns: Zero if successful.

int raspitexutil_gl_init_2_0 ( RASPITEX_STATE * raspitex_state )

Creates an OpenGL ES 2.X context.

Parameters

raspitex_state A pointer to the GL preview state.

Returns: Zero if successful.

void raspitexutil_gl_term ( RASPITEX_STATE * raspitex_state )

Deletes textures and EGL surfaces and context.

Parameters

raspitex_state Pointer to the Raspi

int raspitexutil_redraw ( RASPITEX_STATE * raspitex_state )

Default is a no-op

Parameters

raspitex_state A pointer to the GL preview state.

Returns: Zero.

int raspitexutil_update_model ( RASPITEX_STATE * raspitex_state )

Default is a no-op

Parameters

raspitex_state A pointer to the GL preview state.

Returns: Zero.

int raspitexutil_update_texture	(	RASPITEX_STATE *	raspitex_state,
		EGLClientBuffer	mm_buf
	)

Updates the RGBX texture to the specified MMAL buffer.

Parameters

raspitex_state	A pointer to the GL preview state.
mm_buf	The MMAL buffer.

Returns: Zero if successful.

int raspitexutil_update_u_texture	(	RASPITEX_STATE *	raspitex_state,
		EGLClientBuffer	mm_buf
	)

Updates the U plane texture to the specified MMAL buffer.

Parameters

raspitex_state	A pointer to the GL preview state.
mm_buf	The MMAL buffer.

Returns: Zero if successful.

int raspitexutil_update_v_texture	(	RASPITEX_STATE *	raspitex_state,
		EGLClientBuffer	mm_buf
	)

Updates the V plane texture to the specified MMAL buffer.

Parameters

raspitex_state	A pointer to the GL preview state.
mm_buf	The MMAL buffer.

Returns: Zero if successful.

int raspitexutil_update_y_texture	(	RASPITEX_STATE *	raspitex_state,
		EGLClientBuffer	mm_buf
	)

Updates the Y plane texture to the specified MMAL buffer.

Parameters

raspitex_state	A pointer to the GL preview state.
mm_buf	The MMAL buffer.

Returns: Zero if successful.

Functions

Variables

Detailed Description

Function Documentation