From 788ce5d9089672effa6ae6ae0ad5905dd2207b2c Mon Sep 17 00:00:00 2001
From: Mathias Agopian <mathias@google.com>
Date: Sun, 16 Jan 2011 17:57:20 -0800
Subject: [PATCH] Use EGL_NATIVE_VISUAL_ID to select EGLConfig

EGLUtils::selectConfigForPixelFormat() now uses EGL_NATIVE_VISUAL_ID
to select a config with the proper format. this is more robust and
future proof.

Change-Id: Ib85e0974160945d838956b50a3cac4de78618957
---
 libs/ui/EGLUtils.cpp | 23 ++++-------------------
 1 file changed, 4 insertions(+), 19 deletions(-)

diff --git a/libs/ui/EGLUtils.cpp b/libs/ui/EGLUtils.cpp
index 1663313f2..f24a71d88 100644
--- a/libs/ui/EGLUtils.cpp
+++ b/libs/ui/EGLUtils.cpp
@@ -66,12 +66,6 @@ status_t EGLUtils::selectConfigForPixelFormat(
     if (outConfig == NULL)
         return BAD_VALUE;
     
-    int err;
-    PixelFormatInfo fbFormatInfo;
-    if ((err = getPixelFormatInfo(PixelFormat(format), &fbFormatInfo)) < 0) {
-        return err;
-    }
-
     // Get all the "potential match" configs...
     if (eglGetConfigs(dpy, NULL, 0, &numConfigs) == EGL_FALSE)
         return BAD_VALUE;
@@ -81,23 +75,14 @@ status_t EGLUtils::selectConfigForPixelFormat(
         free(configs);
         return BAD_VALUE;
     }
-
-    const int fbSzA = fbFormatInfo.getSize(PixelFormatInfo::INDEX_ALPHA);
-    const int fbSzR = fbFormatInfo.getSize(PixelFormatInfo::INDEX_RED);
-    const int fbSzG = fbFormatInfo.getSize(PixelFormatInfo::INDEX_GREEN);
-    const int fbSzB = fbFormatInfo.getSize(PixelFormatInfo::INDEX_BLUE); 
     
     int i;
     EGLConfig config = NULL;
     for (i=0 ; i<n ; i++) {
-        EGLint r,g,b,a;
-        EGLConfig curr = configs[i];
-        eglGetConfigAttrib(dpy, curr, EGL_RED_SIZE,   &r);
-        eglGetConfigAttrib(dpy, curr, EGL_GREEN_SIZE, &g);
-        eglGetConfigAttrib(dpy, curr, EGL_BLUE_SIZE,  &b);
-        eglGetConfigAttrib(dpy, curr, EGL_ALPHA_SIZE, &a);
-        if (fbSzA == a && fbSzR == r && fbSzG == g && fbSzB  == b) {
-            config = curr;
+        EGLint nativeVisualId = 0;
+        eglGetConfigAttrib(dpy, configs[i], EGL_NATIVE_VISUAL_ID, &nativeVisualId);
+        if (nativeVisualId>0 && format == nativeVisualId) {
+            config = configs[i];
             break;
         }
     }