lv2_plugin.h

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/*
 *                           0BSD 
 * 
 *                    BSD Zero Clause License
 * 
 *  Copyright (c) 2019 Hermann Meyer
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted.
 
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 *
 */
 
 
#include "lv2/lv2plug.in/ns/lv2core/lv2.h"
#include "lv2/lv2plug.in/ns/extensions/ui/ui.h"
 
// xwidgets.h includes xputty.h and all defined widgets from Xputty
#include "xwidgets.h"
 
#pragma once
 
#ifndef LV2_PLUGIN_H_
#define LV2_PLUGIN_H_
 
#ifdef __cplusplus
extern "C" {
#endif
 
// struct to define the knob pattern colors
typedef struct {
    double p1f[4];
    double p2f[4];
    double p3f[4];
    double p4f[4];
    double p5f[4];
    double p1k[4];
    double p2k[4];
    double p3k[4];
    double p4k[4];
    double p5k[4];
} KnobColors;
 
 
// main window struct
typedef struct {
    void *parentXwindow;
    Xputty main;
    Widget_t *win;
    Widget_t *widget[CONTROLS];
    KnobColors *kp;
    void *private_ptr;
    int block_event;
    int need_resize;
 
    void *controller;
    LV2UI_Write_Function write_function;
    LV2UI_Resize* resize;
} X11_UI;
 
// controller value changed, forward value to host when needed
void plugin_value_changed(X11_UI *ui, Widget_t *w, PortIndex index);
 
// set the plugin initial window size
void plugin_set_window_size(int *w,int *h,const char * plugin_uri);
 
// set the plugin name
const char* plugin_set_name();
 
// create all needed controller 
void plugin_create_controller_widgets(X11_UI *ui, const char * plugin_uri);
 
// add a knob to the main window
Widget_t* add_my_knob(Widget_t *w, PortIndex index, const char * label,
                                X11_UI* ui, int x, int y, int width, int height);
 
// add a image knob to the main window
Widget_t* add_my_image_knob(Widget_t *w, PortIndex index, const char * label,
                                X11_UI* ui, int x, int y, int width, int height);
 
// add a image knob with value to the main window
Widget_t* add_my_value_knob(Widget_t *w, PortIndex index, const char * label,
                                X11_UI* ui, int x, int y, int width, int height);
// add a image toggle button to the main window
Widget_t* add_my_switch_image(Widget_t *w, PortIndex index, const char * label,
                                X11_UI* ui, int x, int y, int width, int height);
 
// add a combobox to the main window
Widget_t* add_my_combobox(Widget_t *w, PortIndex index, const char * label, const char** items,
                                size_t len, int active, X11_UI* ui, int x, int y, int width, int height);
 
// free used mem on exit
void plugin_cleanup(X11_UI *ui);
 
// controller value changed message from host
void plugin_port_event(LV2UI_Handle handle, uint32_t port_index,
                        uint32_t buffer_size, uint32_t format,
                        const void * buffer);
#ifdef __cplusplus
}
#endif
 
#endif //LV2_PLUGIN_H_