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#include <assert.h>
#include <dlfcn.h>
#include <stdio.h>
#include <string.h>
#include "eglconfig.h"
#include "eglcontext.h"
#include "egldisplay.h"
#include "egldriver.h"
#include "eglglobals.h"
#include "eglmode.h"
#include "eglscreen.h"
#include "eglsurface.h"
const char *DefaultDriverName = "demodriver";
/**
* Choose and open/init the hardware driver for the given EGLDisplay.
* Previously, the EGLDisplay was created with _eglNewDisplay() where
* we recorded the user's NativeDisplayType parameter.
*
* Now we'll use the NativeDisplayType value.
*
* Currently, the native display value is treated as a string.
* If the first character is ':' we interpret it as a screen or card index
* number (i.e. ":0" or ":1", etc)
* Else if the first character is '!' we interpret it as specific driver name
* (i.e. "!r200" or "!i830".
*/
_EGLDriver *
_eglChooseDriver(EGLDisplay display)
{
_EGLDisplay *dpy = _eglLookupDisplay(display);
_EGLDriver *drv;
const char *driverName = DefaultDriverName;
const char *name;
assert(dpy);
name = dpy->Name;
if (!name) {
/* use default */
}
else if (name[0] == ':' && (name[1] >= '0' && name[1] <= '9') && !name[2]) {
printf("EGL: Use driver for screen: %s\n", name);
/* XXX probe hardware here to determine which driver to open */
driverName = "libEGLdri";
}
else if (name[0] == '!') {
/* use specified driver name */
driverName = name + 1;
printf("EGL: Use driver named %s\n", driverName);
}
else {
/* Maybe display was returned by XOpenDisplay? */
printf("EGL: can't parse display pointer\n");
}
drv = _eglOpenDriver(dpy, driverName);
dpy->Driver = drv;
return drv;
}
/**
* Open/load the named driver and call its bootstrap function: _eglMain().
* \return new _EGLDriver object.
*/
_EGLDriver *
_eglOpenDriver(_EGLDisplay *dpy, const char *driverName)
{
_EGLDriver *drv;
_EGLMain_t mainFunc;
void *lib;
char driverFilename[1000];
/* XXX also prepend a directory path??? */
sprintf(driverFilename, "%s.so", driverName);
lib = dlopen(driverFilename, RTLD_NOW);
if (!lib) {
fprintf(stderr, "EGLdebug: Error opening %s: %s\n", driverFilename, dlerror());
return NULL;
}
mainFunc = (_EGLMain_t) dlsym(lib, "_eglMain");
if (!mainFunc) {
fprintf(stderr, "_eglMain not found in %s", (char *) driverFilename);
dlclose(lib);
return NULL;
}
drv = mainFunc(dpy);
if (!drv) {
dlclose(lib);
return NULL;
}
/* with a recurvise open you want the inner most handle */
if (!drv->LibHandle)
drv->LibHandle = lib;
else
dlclose(lib);
drv->Display = dpy;
return drv;
}
EGLBoolean
_eglCloseDriver(_EGLDriver *drv, EGLDisplay dpy)
{
void *handle = drv->LibHandle;
EGLBoolean b;
fprintf(stderr, "EGL debug: Closing driver\n");
/*
* XXX check for currently bound context/surfaces and delete them?
*/
b = drv->Terminate(drv, dpy);
dlclose(handle);
return b;
}
/**
* Given a display handle, return the _EGLDriver for that display.
*/
_EGLDriver *
_eglLookupDriver(EGLDisplay dpy)
{
_EGLDisplay *d = _eglLookupDisplay(dpy);
if (d)
return d->Driver;
else
return NULL;
}
/**
* Plug all the available fallback routines into the given driver's
* dispatch table.
*/
void
_eglInitDriverFallbacks(_EGLDriver *drv)
{
/* If a pointer is set to NULL, then the device driver _really_ has
* to implement it.
*/
drv->Initialize = NULL;
drv->Terminate = NULL;
drv->GetConfigs = _eglGetConfigs;
drv->ChooseConfig = _eglChooseConfig;
drv->GetConfigAttrib = _eglGetConfigAttrib;
drv->CreateContext = _eglCreateContext;
drv->DestroyContext = _eglDestroyContext;
drv->MakeCurrent = _eglMakeCurrent;
drv->QueryContext = _eglQueryContext;
drv->CreateWindowSurface = _eglCreateWindowSurface;
drv->CreatePixmapSurface = _eglCreatePixmapSurface;
drv->CreatePbufferSurface = _eglCreatePbufferSurface;
drv->DestroySurface = _eglDestroySurface;
drv->QuerySurface = _eglQuerySurface;
drv->SurfaceAttrib = _eglSurfaceAttrib;
drv->BindTexImage = _eglBindTexImage;
drv->ReleaseTexImage = _eglReleaseTexImage;
drv->SwapInterval = _eglSwapInterval;
drv->SwapBuffers = _eglSwapBuffers;
drv->CopyBuffers = _eglCopyBuffers;
drv->QueryString = _eglQueryString;
drv->WaitGL = _eglWaitGL;
drv->WaitNative = _eglWaitNative;
/* EGL_MESA_screen */
drv->ChooseModeMESA = _eglChooseModeMESA;
drv->GetModesMESA = _eglGetModesMESA;
drv->GetModeAttribMESA = _eglGetModeAttribMESA;
drv->GetScreensMESA = _eglGetScreensMESA;
drv->CreateScreenSurfaceMESA = _eglCreateScreenSurfaceMESA;
drv->ShowSurfaceMESA = _eglShowSurfaceMESA;
drv->ScreenPositionMESA = _eglScreenPositionMESA;
drv->QueryScreenMESA = _eglQueryScreenMESA;
drv->QueryScreenSurfaceMESA = _eglQueryScreenSurfaceMESA;
drv->QueryScreenModeMESA = _eglQueryScreenModeMESA;
drv->QueryModeStringMESA = _eglQueryModeStringMESA;
}
/**
* Examine the individual extension enable/disable flags and recompute
* the driver's Extensions string.
*/
static void
UpdateExtensionsString(_EGLDriver *drv)
{
drv->Extensions[0] = 0;
if (drv->MESA_screen_surface)
strcat(drv->Extensions, "EGL_MESA_screen_surface ");
if (drv->MESA_copy_context)
strcat(drv->Extensions, "EGL_MESA_copy_context ");
assert(strlen(drv->Extensions) < MAX_EXTENSIONS_LEN);
}
const char *
_eglQueryString(_EGLDriver *drv, EGLDisplay dpy, EGLint name)
{
(void) drv;
(void) dpy;
switch (name) {
case EGL_VENDOR:
return "Mesa Project";
case EGL_VERSION:
return "1.0";
case EGL_EXTENSIONS:
UpdateExtensionsString(drv);
return drv->Extensions;
default:
_eglError(EGL_BAD_PARAMETER, "eglQueryString");
return NULL;
}
}
EGLBoolean
_eglWaitGL(_EGLDriver *drv, EGLDisplay dpy)
{
/* just a placeholder */
(void) drv;
(void) dpy;
return EGL_TRUE;
}
EGLBoolean
_eglWaitNative(_EGLDriver *drv, EGLDisplay dpy, EGLint engine)
{
/* just a placeholder */
(void) drv;
(void) dpy;
(void) engine;
return EGL_TRUE;
}
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