rs_processing_gl.h

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/* License: Apache 2.0. See LICENSE file in root directory.
   Copyright(c) 2017 Intel Corporation. All Rights Reserved. */

#ifndef LIBREALSENSE_RS2_PROCESSING_GL_H
#define LIBREALSENSE_RS2_PROCESSING_GL_H

#ifdef __cplusplus
extern "C" {
#endif

#include "librealsense2/rs.h"

/*
* GL-specific extension types.
* Used similar to regular RS extensions
*/
typedef enum rs2_gl_extension
{
    RS2_GL_EXTENSION_VIDEO_FRAME,
    RS2_GL_EXTENSION_COUNT
} rs2_gl_extension;
const char* rs2_gl_extension_to_string(rs2_extension type);

/*
* In addition to "options", GL processing blocks
* expose new type of multidementional options each holding a 4x4 matrix
*/
typedef enum rs2_gl_matrix_type
{
    RS2_GL_MATRIX_TRANSFORMATION,
    RS2_GL_MATRIX_PROJECTION,
    RS2_GL_MATRIX_CAMERA,
    RS2_GL_MATRIX_COUNT
} rs2_gl_matrix_type;
const char* rs2_gl_matrix_type_to_string(rs2_gl_matrix_type type);

/* Forward-declare GLFW types */
typedef struct GLFWwindow GLFWwindow;
typedef struct GLFWmonitor GLFWmonitor;
typedef int(*glfwInitFun)(void);
typedef void(*glfwWindowHintFun)(int, int);
typedef GLFWwindow*(*glfwCreateWindowFun)(int, int, const char*, GLFWmonitor*, GLFWwindow*);
typedef void(*glfwDestroyWindowFun)(GLFWwindow*);
typedef void(*glfwMakeContextCurrentFun)(GLFWwindow*);
typedef GLFWwindow*(*glfwGetCurrentContextFun)(void);
typedef void(*glfwSwapIntervalFun)(int);
typedef void(*GLFWglproc)(void);
typedef GLFWglproc(*glfwGetProcAddressFun)(const char*);

/* To avoid GLFW version mismatch (mainly can affect Windows), the application passes pointers
* to its version of GLFW, via glfw_bindings struct
*/
struct glfw_binding
{
    glfwInitFun glfwInit;
    glfwWindowHintFun glfwWindowHint;
    glfwCreateWindowFun glfwCreateWindow;
    glfwDestroyWindowFun glfwDestroyWindow ;
    glfwMakeContextCurrentFun glfwMakeContextCurrent;
    glfwGetCurrentContextFun glfwGetCurrentContext;
    glfwSwapIntervalFun glfwSwapInterval;
    glfwGetProcAddressFun glfwGetProcAddress;
};

rs2_processing_block* rs2_gl_create_yuy_decoder(int api_version, rs2_error** error);

void rs2_gl_set_matrix(rs2_processing_block* block, rs2_gl_matrix_type type, float* m4x4, rs2_error** error);

int rs2_gl_is_frame_extendable_to(const rs2_frame* f, rs2_gl_extension extension_type, rs2_error** error);

unsigned int rs2_gl_frame_get_texture_id(const rs2_frame* f, unsigned int id, rs2_error** error);

rs2_processing_block* rs2_gl_create_camera_renderer(int api_version, rs2_error** error);

rs2_processing_block* rs2_gl_create_pointcloud_renderer(int api_version, rs2_error** error);

rs2_processing_block* rs2_gl_create_pointcloud(int api_version, rs2_error** error);

rs2_processing_block* rs2_gl_create_uploader(int api_version, rs2_error** error);

rs2_processing_block* rs2_gl_create_colorizer(int api_version, rs2_error** error);

rs2_processing_block* rs2_gl_create_align(int api_version, rs2_stream to, rs2_error** error);

void rs2_gl_init_rendering(int api_version, int use_glsl, rs2_error** error);

void rs2_gl_init_rendering_glfw(int api_version, glfw_binding bindings, int use_glsl, rs2_error** error);

void rs2_gl_init_processing(int api_version, int use_glsl, rs2_error** error);

void rs2_gl_init_processing_glfw(int api_version, GLFWwindow* share_with, 
                                 glfw_binding bindings, int use_glsl, rs2_error** error);

void rs2_gl_shutdown_rendering(int api_version, rs2_error** error);

void rs2_gl_shutdown_processing(int api_version, rs2_error** error);

#ifdef __cplusplus
}
#endif
#endif