diff options
Diffstat (limited to 'src/egl/main/egldriver.c')
| -rw-r--r-- | src/egl/main/egldriver.c | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/src/egl/main/egldriver.c b/src/egl/main/egldriver.c new file mode 100644 index 0000000000..bda06dd827 --- /dev/null +++ b/src/egl/main/egldriver.c @@ -0,0 +1,272 @@ +#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 "egllog.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]) { + /* XXX probe hardware here to determine which driver to open */ + driverName = "libEGLdri"; + } + else if (name[0] == '!') { + /* use specified driver name */ + driverName = name + 1; + } + else { + /* Maybe display was returned by XOpenDisplay? */ + _eglLog(_EGL_FATAL, "eglChooseDriver() bad name"); + } + + _eglLog(_EGL_INFO, "eglChooseDriver() choosing %s", driverName); + + 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); + + _eglLog(_EGL_DEBUG, "dlopen(%s)", driverFilename); + lib = dlopen(driverFilename, RTLD_NOW); + if (!lib) { + _eglLog(_EGL_WARNING, "Could not open %s (%s)", + driverFilename, dlerror()); + return NULL; + } + + mainFunc = (_EGLMain_t) dlsym(lib, "_eglMain"); + if (!mainFunc) { + _eglLog(_EGL_WARNING, "_eglMain not found in %s", 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; + + _eglLog(_EGL_INFO, "Closing driver"); + + /* + * XXX check for currently bound context/surfaces and delete them? + */ + + b = drv->API.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->API.Initialize = NULL; + drv->API.Terminate = NULL; + + drv->API.GetConfigs = _eglGetConfigs; + drv->API.ChooseConfig = _eglChooseConfig; + drv->API.GetConfigAttrib = _eglGetConfigAttrib; + + drv->API.CreateContext = _eglCreateContext; + drv->API.DestroyContext = _eglDestroyContext; + drv->API.MakeCurrent = _eglMakeCurrent; + drv->API.QueryContext = _eglQueryContext; + + drv->API.CreateWindowSurface = _eglCreateWindowSurface; + drv->API.CreatePixmapSurface = _eglCreatePixmapSurface; + drv->API.CreatePbufferSurface = _eglCreatePbufferSurface; + drv->API.DestroySurface = _eglDestroySurface; + drv->API.QuerySurface = _eglQuerySurface; + drv->API.SurfaceAttrib = _eglSurfaceAttrib; + drv->API.BindTexImage = _eglBindTexImage; + drv->API.ReleaseTexImage = _eglReleaseTexImage; + drv->API.SwapInterval = _eglSwapInterval; + drv->API.SwapBuffers = _eglSwapBuffers; + drv->API.CopyBuffers = _eglCopyBuffers; + + drv->API.QueryString = _eglQueryString; + drv->API.WaitGL = _eglWaitGL; + drv->API.WaitNative = _eglWaitNative; + +#ifdef EGL_MESA_screen_surface + drv->API.ChooseModeMESA = _eglChooseModeMESA; + drv->API.GetModesMESA = _eglGetModesMESA; + drv->API.GetModeAttribMESA = _eglGetModeAttribMESA; + drv->API.GetScreensMESA = _eglGetScreensMESA; + drv->API.CreateScreenSurfaceMESA = _eglCreateScreenSurfaceMESA; + drv->API.ShowScreenSurfaceMESA = _eglShowScreenSurfaceMESA; + drv->API.ScreenPositionMESA = _eglScreenPositionMESA; + drv->API.QueryScreenMESA = _eglQueryScreenMESA; + drv->API.QueryScreenSurfaceMESA = _eglQueryScreenSurfaceMESA; + drv->API.QueryScreenModeMESA = _eglQueryScreenModeMESA; + drv->API.QueryModeStringMESA = _eglQueryModeStringMESA; +#endif /* EGL_MESA_screen_surface */ + +#ifdef EGL_VERSION_1_2 + drv->API.CreatePbufferFromClientBuffer = _eglCreatePbufferFromClientBuffer; +#endif /* EGL_VERSION_1_2 */ +} + + +/** + * Examine the individual extension enable/disable flags and recompute + * the driver's Extensions string. + */ +static void +_eglUpdateExtensionsString(_EGLDriver *drv) +{ + drv->Extensions.String[0] = 0; + + if (drv->Extensions.MESA_screen_surface) + strcat(drv->Extensions.String, "EGL_MESA_screen_surface "); + if (drv->Extensions.MESA_copy_context) + strcat(drv->Extensions.String, "EGL_MESA_copy_context "); + assert(strlen(drv->Extensions.String) < 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: + _eglUpdateExtensionsString(drv); + return drv->Extensions.String; +#ifdef EGL_VERSION_1_2 + case EGL_CLIENT_APIS: + /* XXX need to initialize somewhere */ + return drv->ClientAPIs; +#endif + 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; + switch (engine) { + case EGL_CORE_NATIVE_ENGINE: + break; + default: + _eglError(EGL_BAD_PARAMETER, "eglWaitNative(engine)"); + return EGL_FALSE; + } + + return EGL_TRUE; +} |