From 37213ceacc2d7b309de7641da501282f8f24c8c2 Mon Sep 17 00:00:00 2001
From: Chia-I Wu <olv@lunarg.com>
Date: Sat, 23 Oct 2010 02:11:21 +0800
Subject: egl: Minor changes to the _EGLScreen interface.

Make _eglInitScreen take a display and rename _eglAddScreen to
_eglLinkScreen.  Remove unused functions.
---
 src/egl/main/eglscreen.c | 101 +++++++++++++++--------------------------------
 src/egl/main/eglscreen.h |  34 +++++++---------
 2 files changed, 47 insertions(+), 88 deletions(-)

(limited to 'src/egl/main')

diff --git a/src/egl/main/eglscreen.c b/src/egl/main/eglscreen.c
index 2ae403494e..0bbead8476 100644
--- a/src/egl/main/eglscreen.c
+++ b/src/egl/main/eglscreen.c
@@ -53,16 +53,42 @@ _eglAllocScreenHandle(void)
  * Initialize an _EGLScreen object to default values.
  */
 void
-_eglInitScreen(_EGLScreen *screen)
+_eglInitScreen(_EGLScreen *screen, _EGLDisplay *dpy)
 {
    memset(screen, 0, sizeof(_EGLScreen));
+   screen->Display = dpy;
    screen->StepX = 1;
    screen->StepY = 1;
 }
 
 
 /**
- * Given a public screen handle, return the internal _EGLScreen object.
+ * Link a screen to its display and return the handle of the link.
+ * The handle can be passed to client directly.
+ */
+EGLScreenMESA
+_eglLinkScreen(_EGLScreen *screen)
+{
+   _EGLDisplay *display;
+
+   assert(screen && screen->Display);
+   display = screen->Display;
+
+   if (!display->Screens) {
+      display->Screens = _eglCreateArray("Screen", 4);
+      if (!display->Screens)
+         return (EGLScreenMESA) 0;
+   }
+   screen->Handle = _eglAllocScreenHandle();
+   _eglAppendArray(display->Screens, (void *) screen);
+
+   return screen->Handle;
+}
+
+
+/**
+ * Lookup a handle to find the linked config.
+ * Return NULL if the handle has no corresponding linked config.
  */
 _EGLScreen *
 _eglLookupScreen(EGLScreenMESA screen, _EGLDisplay *display)
@@ -74,39 +100,21 @@ _eglLookupScreen(EGLScreenMESA screen, _EGLDisplay *display)
 
    for (i = 0; i < display->Screens->Size; i++) {
       _EGLScreen *scr = (_EGLScreen *) display->Screens->Elements[i];
-      if (scr->Handle == screen)
+      if (scr->Handle == screen) {
+         assert(scr->Display == display);
          return scr;
+      }
    }
    return NULL;
 }
 
 
-/**
- * Add the given _EGLScreen to the display's list of screens.
- */
-void
-_eglAddScreen(_EGLDisplay *display, _EGLScreen *screen)
-{
-   assert(display);
-   assert(screen);
-
-   if (!display->Screens) {
-      display->Screens = _eglCreateArray("Screen", 4);
-      if (!display->Screens)
-         return;
-   }
-   screen->Handle = _eglAllocScreenHandle();
-   _eglAppendArray(display->Screens, (void *) screen);
-}
-
-
-
 static EGLBoolean
 _eglFlattenScreen(void *elem, void *buffer)
 {
    _EGLScreen *scr = (_EGLScreen *) elem;
    EGLScreenMESA *handle = (EGLScreenMESA *) buffer;
-   *handle = scr->Handle;
+   *handle = _eglGetScreenHandle(scr);
    return EGL_TRUE;
 }
 
@@ -122,22 +130,6 @@ _eglGetScreensMESA(_EGLDriver *drv, _EGLDisplay *display, EGLScreenMESA *screens
 }
 
 
-/**
- * Set a screen's current display mode.
- * Note: mode = EGL_NO_MODE is valid (turns off the screen)
- *
- * This is just a placeholder function; drivers will always override
- * this with code that _really_ sets the mode.
- */
-EGLBoolean
-_eglScreenModeMESA(_EGLDriver *drv, _EGLDisplay *dpy, _EGLScreen *scrn,
-                   _EGLMode *m)
-{
-   scrn->CurrentMode = m;
-   return EGL_TRUE;
-}
-
-
 /**
  * Set a screen's surface origin.
  */
@@ -198,33 +190,4 @@ _eglQueryScreenMESA(_EGLDriver *drv, _EGLDisplay *dpy, _EGLScreen *scrn,
 }
 
 
-/**
- * Delete the modes associated with given screen.
- */
-void
-_eglDestroyScreenModes(_EGLScreen *scrn)
-{
-   EGLint i;
-   for (i = 0; i < scrn->NumModes; i++) {
-      if (scrn->Modes[i].Name)
-         free((char *) scrn->Modes[i].Name); /* cast away const */
-   }
-   if (scrn->Modes)
-      free(scrn->Modes);
-   scrn->Modes = NULL;
-   scrn->NumModes = 0;
-}
-
-      
-/**
- * Default fallback routine - drivers should usually override this.
- */
-void
-_eglDestroyScreen(_EGLScreen *scrn)
-{
-   _eglDestroyScreenModes(scrn);
-   free(scrn);
-}
-
-
 #endif /* EGL_MESA_screen_surface */
diff --git a/src/egl/main/eglscreen.h b/src/egl/main/eglscreen.h
index e564793e51..44fe20da3b 100644
--- a/src/egl/main/eglscreen.h
+++ b/src/egl/main/eglscreen.h
@@ -19,6 +19,8 @@
  */
 struct _egl_screen
 {
+   _EGLDisplay *Display;
+
    EGLScreenMESA Handle; /* The public/opaque handle which names this object */
 
    _EGLMode *CurrentMode;
@@ -33,33 +35,35 @@ struct _egl_screen
 
 
 PUBLIC void
-_eglInitScreen(_EGLScreen *screen);
+_eglInitScreen(_EGLScreen *screen, _EGLDisplay *dpy);
+
+
+PUBLIC EGLScreenMESA
+_eglLinkScreen(_EGLScreen *screen);
 
 
 extern _EGLScreen *
 _eglLookupScreen(EGLScreenMESA screen, _EGLDisplay *dpy);
 
 
-PUBLIC void
-_eglAddScreen(_EGLDisplay *display, _EGLScreen *screen);
+/**
+ * Return the handle of a linked screen.
+ */
+static INLINE EGLScreenMESA
+_eglGetScreenHandle(_EGLScreen *screen)
+{
+   return (screen) ? screen->Handle : (EGLScreenMESA) 0;
+}
 
 
 extern EGLBoolean
 _eglGetScreensMESA(_EGLDriver *drv, _EGLDisplay *dpy, EGLScreenMESA *screens, EGLint max_screens, EGLint *num_screens);
 
 
-extern EGLBoolean
-_eglScreenModeMESA(_EGLDriver *drv, _EGLDisplay *dpy, _EGLScreen *scrn, _EGLMode *m);
-
-
 extern EGLBoolean
 _eglScreenPositionMESA(_EGLDriver *drv, _EGLDisplay *dpy, _EGLScreen *scrn, EGLint x, EGLint y);
 
 
-extern EGLBoolean
-_eglQueryDisplayMESA(_EGLDriver *drv, _EGLDisplay *dpy, EGLint attribute, EGLint *value);
-
-
 extern EGLBoolean
 _eglQueryScreenSurfaceMESA(_EGLDriver *drv, _EGLDisplay *dpy,
                            _EGLScreen *scrn, _EGLSurface **surface);
@@ -73,14 +77,6 @@ extern EGLBoolean
 _eglQueryScreenMESA(_EGLDriver *drv, _EGLDisplay *dpy, _EGLScreen *scrn, EGLint attribute, EGLint *value);
 
 
-extern void
-_eglDestroyScreenModes(_EGLScreen *scrn);
-
-
-PUBLIC void
-_eglDestroyScreen(_EGLScreen *scrn);
-
-
 #endif /* EGL_MESA_screen_surface */
 
 
-- 
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