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livetrax/libs/tk/suil/suil_internal.h

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/*
Copyright 2007-2017 David Robillard <http://drobilla.net>
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THIS 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.
*/
#ifndef SUIL_INTERNAL_H
#define SUIL_INTERNAL_H
#include "dylib.h"
#include "suil_config.h"
#include "lv2/ui/ui.h"
#include "suil/suil.h"
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef __cplusplus
extern "C" {
#endif
#define SUIL_ERRORF(fmt, ...) fprintf(stderr, "suil error: " fmt, __VA_ARGS__)
struct SuilHostImpl {
SuilPortWriteFunc write_func;
SuilPortIndexFunc index_func;
SuilPortSubscribeFunc subscribe_func;
SuilPortUnsubscribeFunc unsubscribe_func;
SuilTouchFunc touch_func;
void* gtk_lib;
int argc;
char** argv;
};
struct _SuilWrapper;
typedef void (*SuilWrapperFreeFunc)(struct _SuilWrapper*);
typedef int (*SuilWrapperWrapFunc)(struct _SuilWrapper* wrapper,
SuilInstance* instance);
typedef struct _SuilWrapper {
SuilWrapperWrapFunc wrap;
SuilWrapperFreeFunc free;
void* lib;
void* impl;
LV2UI_Resize resize;
} SuilWrapper;
struct SuilInstanceImpl {
void* lib_handle;
const LV2UI_Descriptor* descriptor;
LV2UI_Handle handle;
SuilWrapper* wrapper;
LV2_Feature** features;
LV2UI_Port_Map port_map;
LV2UI_Port_Subscribe port_subscribe;
LV2UI_Touch touch;
SuilWidget ui_widget;
SuilWidget host_widget;
};
/**
The type of the suil_wrapper_new entry point in a wrapper module.
This constructs a SuilWrapper which contains everything necessary
to wrap a widget, including a possibly extended features array to
be used for instantiating the UI.
*/
typedef SuilWrapper* (*SuilWrapperNewFunc)(SuilHost* host,
const char* host_type_uri,
const char* ui_type_uri,
LV2_Feature*** features,
unsigned n_features);
/** Prototype for suil_wrapper_new in each wrapper module. */
SUIL_LIB_EXPORT
SuilWrapper*
suil_wrapper_new(SuilHost* host,
const char* host_type_uri,
const char* ui_type_uri,
LV2_Feature*** features,
unsigned n_features);
/** Prototype for suil_host_init in each init module. */
SUIL_LIB_EXPORT
void
suil_host_init(void);
/** Dynamically load the suil module with the given name. */
static inline void*
suil_open_module(const char* module_name)
{
const char* const env_dir = getenv("SUIL_MODULE_DIR");
const char* const mod_dir = env_dir ? env_dir : SUIL_MODULE_DIR;
const size_t path_len = strlen(mod_dir)
+ strlen(SUIL_DIR_SEP SUIL_MODULE_PREFIX SUIL_MODULE_EXT)
+ strlen(module_name)
+ 2;
char* const path = (char*)calloc(path_len, 1);
snprintf(path, path_len, "%s%s%s%s%s",
mod_dir, SUIL_DIR_SEP,
SUIL_MODULE_PREFIX, module_name, SUIL_MODULE_EXT);
dylib_error();
void* lib = dylib_open(path, DYLIB_NOW);
if (!lib) {
SUIL_ERRORF("Failed to open module %s (%s)\n", path, dylib_error());
}
free(path);
return lib;
}
typedef void (*SuilVoidFunc)(void);
/** dlsym wrapper to return a function pointer (without annoying warning) */
static inline SuilVoidFunc
suil_dlfunc(void* handle, const char* symbol)
{
#ifdef _WIN32
return (SuilVoidFunc)GetProcAddress((HMODULE)handle, symbol);
#else
typedef SuilVoidFunc (*VoidFuncGetter)(void*, const char*);
VoidFuncGetter dlfunc = (VoidFuncGetter)dlsym;
return dlfunc(handle, symbol);
#endif
}
/** Add a feature to a (mutable) LV2 feature array. */
static inline void
suil_add_feature(LV2_Feature*** features,
unsigned* n,
const char* uri,
void* data)
{
for (unsigned i = 0; i < *n && (*features)[i]; ++i) {
if (!strcmp((*features)[i]->URI, uri)) {
(*features)[i]->data = data;
return;
}
}
*features = (LV2_Feature**)realloc(*features,
sizeof(LV2_Feature*) * (*n + 2));
(*features)[*n] = (LV2_Feature*)malloc(sizeof(LV2_Feature));
(*features)[*n]->URI = uri;
(*features)[*n]->data = data;
(*features)[*n + 1] = NULL;
*n += 1;
}
extern int suil_argc;
extern char** suil_argv;
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif // SUIL_INTERNAL_H