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-rw-r--r--src/egl/main/egldriver.c226
1 files changed, 226 insertions, 0 deletions
diff --git a/src/egl/main/egldriver.c b/src/egl/main/egldriver.c
new file mode 100644
index 00000000000..5b65b80ea4b
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+++ b/src/egl/main/egldriver.c
@@ -0,0 +1,226 @@
+#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 "eglsurface.h"
+
+
+const char *DefaultDriverName = "demo";
+
+
+/**
+ * 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 = "something"; */
+ }
+ 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)
+{
+ void *lib;
+ char driverFilename[1000];
+
+ /* XXX also prepend a directory path??? */
+ sprintf(driverFilename, "%sdriver.so", driverName);
+
+#if 1
+ lib = dlopen(driverFilename, RTLD_NOW);
+ if (lib) {
+ _EGLDriver *drv;
+ _EGLMain_t mainFunc;
+
+ 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;
+ }
+
+ drv->LibHandle = lib;
+ drv->Display = dpy;
+ return drv;
+ }
+ else {
+ fprintf(stderr, "EGLdebug: Error opening %s: %s\n",
+ driverFilename, dlerror());
+ return NULL;
+ }
+#else
+ /* use built-in driver */
+ return _eglDefaultMain(d);
+#endif
+}
+
+
+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->GetModesMESA = _eglGetModesMESA;
+ drv->GetModeAttribMESA = _eglGetModeAttribMESA;
+}
+
+
+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:
+ return "";
+ 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;
+}