From 8b0c6c4a8dc1899d56e52fe3b0a9e1165c30ecae Mon Sep 17 00:00:00 2001
From: Chia-I Wu <olv@lunarg.com>
Date: Wed, 30 Jun 2010 18:02:23 +0800
Subject: egl: Store screens in a dynamic array.

---
 src/egl/main/egldisplay.h |  4 +---
 src/egl/main/eglmode.c    |  7 +++++--
 src/egl/main/eglscreen.c  | 50 +++++++++++++++++++++++------------------------
 3 files changed, 31 insertions(+), 30 deletions(-)

(limited to 'src/egl')

diff --git a/src/egl/main/egldisplay.h b/src/egl/main/egldisplay.h
index e729038f9e..0b2f26a4c0 100644
--- a/src/egl/main/egldisplay.h
+++ b/src/egl/main/egldisplay.h
@@ -90,9 +90,7 @@ struct _egl_display
 
    _EGLExtensions Extensions;
 
-   EGLint NumScreens;
-   _EGLScreen **Screens;  /* array [NumScreens] */
-
+   _EGLArray *Screens;
    _EGLArray *Configs;
 
    /* lists of resources */
diff --git a/src/egl/main/eglmode.c b/src/egl/main/eglmode.c
index 66446c0495..859e9318b4 100644
--- a/src/egl/main/eglmode.c
+++ b/src/egl/main/eglmode.c
@@ -22,9 +22,12 @@ _eglLookupMode(EGLModeMESA mode, _EGLDisplay *disp)
 {
    EGLint scrnum;
 
+   if (!disp->Screens)
+      return NULL;
+
    /* loop over all screens on the display */
-   for (scrnum = 0; scrnum < disp->NumScreens; scrnum++) {
-      const _EGLScreen *scrn = disp->Screens[scrnum];
+   for (scrnum = 0; scrnum < disp->Screens->Size; scrnum++) {
+      const _EGLScreen *scrn = disp->Screens->Elements[scrnum];
       EGLint i;
       /* search list of modes for handle */
       for (i = 0; i < scrn->NumModes; i++) {
diff --git a/src/egl/main/eglscreen.c b/src/egl/main/eglscreen.c
index c47afd6abd..8f96fd935c 100644
--- a/src/egl/main/eglscreen.c
+++ b/src/egl/main/eglscreen.c
@@ -62,9 +62,13 @@ _eglLookupScreen(EGLScreenMESA screen, _EGLDisplay *display)
 {
    EGLint i;
 
-   for (i = 0; i < display->NumScreens; i++) {
-      if (display->Screens[i]->Handle == screen)
-         return display->Screens[i];
+   if (!display->Screens)
+      return NULL;
+
+   for (i = 0; i < display->Screens->Size; i++) {
+      _EGLScreen *scr = (_EGLScreen *) display->Screens->Elements[i];
+      if (scr->Handle == screen)
+         return scr;
    }
    return NULL;
 }
@@ -76,40 +80,36 @@ _eglLookupScreen(EGLScreenMESA screen, _EGLDisplay *display)
 void
 _eglAddScreen(_EGLDisplay *display, _EGLScreen *screen)
 {
-   EGLint n;
-
    assert(display);
    assert(screen);
 
+   if (!display->Screens) {
+      display->Screens = _eglCreateArray("Screen", 4);
+      if (!display->Screens)
+         return;
+   }
    screen->Handle = _eglAllocScreenHandle();
-   n = display->NumScreens;
-   display->Screens = realloc(display->Screens, (n+1) * sizeof(_EGLScreen *));
-   display->Screens[n] = screen;
-   display->NumScreens++;
+   _eglAppendArray(display->Screens, (void *) screen);
 }
 
 
 
+static EGLBoolean
+_eglFlattenScreen(void *elem, void *buffer)
+{
+   _EGLScreen *scr = (_EGLScreen *) elem;
+   EGLScreenMESA *handle = (EGLScreenMESA *) buffer;
+   *handle = scr->Handle;
+   return EGL_TRUE;
+}
+
+
 EGLBoolean
 _eglGetScreensMESA(_EGLDriver *drv, _EGLDisplay *display, EGLScreenMESA *screens,
                    EGLint max_screens, EGLint *num_screens)
 {
-   EGLint n;
-
-   if (display->NumScreens > max_screens) {
-      n = max_screens;
-   }
-   else {
-      n = display->NumScreens;
-   }
-
-   if (screens) {
-      EGLint i;
-      for (i = 0; i < n; i++)
-         screens[i] = display->Screens[i]->Handle;
-   }
-   if (num_screens)
-      *num_screens = n;
+   *num_screens = _eglFlattenArray(display->Screens, (void *) screens,
+         sizeof(screens[0]), max_screens, _eglFlattenScreen);
 
    return EGL_TRUE;
 }
-- 
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