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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.org/license.html
*/
#include "gfx.h"
#if GFX_NEED_GDRIVER
// Some HACKS as these aren't supported yet
#ifndef GINPUT_NEED_STRING
#define GINPUT_NEED_STRING FALSE
#endif
#ifndef GFX_USE_GBLOCK
#define GFX_USE_GBLOCK FALSE
#endif
// Define the tables to hold the driver instances.
static GDriver *dhead;
// The system initialization.
void _gdriverInit(void) {
const GDriverAutoStart const *pa;
int cnt;
#if GFX_USE_GDISP
#ifdef GDISP_DRIVER_LIST
{
static const struct {
const struct GDISPVMT const * vmt;
int instances;
} drivers[] = {GDISP_DRIVER_LIST};
for(pa = drivers; pa < &drivers[sizeof(drivers)/sizeof(drivers[0])]) {
for(cnt = pa->instances; cnt; cnt--)
gdriverRegister(pa->vmt);
}
}
#else
extern struct GDISPVMT GDISP_VMT;
gdriverRegister((GDriver *)&GDISP_VMT);
#endif
#endif
}
GDriver *gdriverRegister(const GDriverVMT *vmt) {
GDriver *pd;
GDriver *dtail;
int dinstance, sinstance;
// Loop to find the driver instance and the system instance numbers
dinstance = sinstance = 0;
for(pd = dhead; pd; dtail = pd, pd = pd->driverchain) {
if (pd->vmt == vmt)
dinstance++;
if (pd->vmt->type == vmt->type)
sinstance++;
}
// Get a new driver instance of the correct size and initialize it
pd = gfxAlloc(vmt->objsize);
if (!pd)
return 0;
pd->driverchain = 0;
pd->vmt = vmt;
if (vmt->init && !vmt->init(pd, dinstance, sinstance)) {
gfxFree(pd);
return 0;
}
// Add it to the driver chain
if (dhead)
dtail->driverchain = pd;
else
dhead = pd;
}
void gdriverUnRegister(GDriver *driver) {
GDriver *pd;
// Safety
if (!driver)
return;
// Remove it from the list of drivers
if (dhead == driver)
dhead = driver->driverchain;
else {
for(pd = dhead; pd->driverchain; pd = pd->driverchain) {
if (pd->driverchain == driver) {
pd->driverchain = driver->driverchain;
break;
}
}
}
// Call the deinit()
if (driver->vmt->deinit)
driver->vmt->dinit(driver);
// Cleanup
gfxFree(driver);
}
GDriver *gdriverGetInstance(uint16_t type, int instance) {
GDriver *pd;
int sinstance;
// Loop to find the system instance
sinstance = 0;
for(pd = dhead; pd; pd = pd->driverchain) {
if (pd->vmt->type == type) {
if (sinstance == instance)
return pd;
sinstance++;
}
}
return 0;
}
int gdriverInstanceCount(uint16_t type) {
GDriver *pd;
int sinstance;
// Loop to count the system instances
sinstance = 0;
for(pd = dhead; pd; pd = pd->driverchain) {
if (pd->vmt->type == type)
sinstance++;
}
return sinstance;
}
#endif /* GFX_NEED_GDRIVER */
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