progs: Check the number of configs returned by eglChooseConfig.

A successful eglChooseConfig call does not imply there are valid
configs.

Signed-off-by: Chia-I Wu <olvaffe@gmail.com>

6 files changed, 14 insertions, 10 deletions

diff --git a/progs/egl/xegl_tri.c b/progs/egl/xegl_tri.c
index 8c4d7f973c..1f1a005a21 100644
--- a/progs/egl/xegl_tri.c
+++ b/progs/egl/xegl_tri.c
@@ -139,7 +139,8 @@ make_x_window(Display *x_dpy, EGLDisplay egl_dpy,
    scrnum = DefaultScreen( x_dpy );
    root = RootWindow( x_dpy, scrnum );
 
-   if (!eglChooseConfig( egl_dpy, attribs, &config, 1, &num_configs)) {
+   if (!eglChooseConfig( egl_dpy, attribs, &config, 1, &num_configs) ||
+       !num_configs) {
       printf("Error: couldn't get an EGL visual config\n");
       exit(1);
    }
diff --git a/progs/egl/xeglbindtex.c b/progs/egl/xeglbindtex.c
index 8103a6a148..7e35534f8d 100644
--- a/progs/egl/xeglbindtex.c
+++ b/progs/egl/xeglbindtex.c
@@ -66,7 +66,8 @@ make_pbuffer(int width, int height)
    EGLConfig config;
    EGLint num_configs;
 
-   if (!eglChooseConfig(dpy, config_attribs, &config, 1, &num_configs)) {
+   if (!eglChooseConfig(dpy, config_attribs, &config, 1, &num_configs) ||
+       !num_configs) {
       printf("Error: couldn't get an EGL visual config for pbuffer\n");
       exit(1);
    }
@@ -144,7 +145,8 @@ make_window(Display *x_dpy, const char *name,
    scrnum = DefaultScreen( x_dpy );
    root = RootWindow( x_dpy, scrnum );
 
-   if (!eglChooseConfig(dpy, attribs, &config, 1, &num_configs)) {
+   if (!eglChooseConfig(dpy, attribs, &config, 1, &num_configs) ||
+       !num_configs) {
       printf("Error: couldn't get an EGL visual config\n");
       exit(1);
    }
diff --git a/progs/egl/xeglthreads.c b/progs/egl/xeglthreads.c
index 7d056ebc6f..5787faecb9 100644
--- a/progs/egl/xeglthreads.c
+++ b/progs/egl/xeglthreads.c
@@ -485,7 +485,8 @@ create_window(struct winthread *wt, EGLContext shareCtx)
    scrnum = DefaultScreen(wt->Dpy);
    root = RootWindow(wt->Dpy, scrnum);
 
-   if (!eglChooseConfig(wt->Display, attribs, &config, 1, &num_configs)) {
+   if (!eglChooseConfig(wt->Display, attribs, &config, 1, &num_configs) ||
+       !num_configs) {
       Error("Unable to choose an EGL config");
    }
 
diff --git a/progs/openvg/demos/eglcommon.c b/progs/openvg/demos/eglcommon.c
index dcec1ac4a4..0316e596c6 100644
--- a/progs/openvg/demos/eglcommon.c
+++ b/progs/openvg/demos/eglcommon.c
@@ -61,13 +61,13 @@ make_x_window(Display *x_dpy, EGLDisplay egl_dpy,
    scrnum = DefaultScreen( x_dpy );
    root = RootWindow( x_dpy, scrnum );
 
-   if (!eglChooseConfig( egl_dpy, attribs, &config, 1, &num_configs)) {
+   if (!eglChooseConfig( egl_dpy, attribs, &config, 1, &num_configs) ||
+       !num_configs) {
       printf("Error: couldn't get an EGL visual config\n");
       exit(1);
    }
 
    assert(config);
-   assert(num_configs > 0);
 
    if (!eglGetConfigAttrib(egl_dpy, config, EGL_NATIVE_VISUAL_ID, &vid)) {
       printf("Error: eglGetConfigAttrib() failed\n");
diff --git a/progs/openvg/demos/lion.c b/progs/openvg/demos/lion.c
index 3645b22bc5..adb269bfd8 100644
--- a/progs/openvg/demos/lion.c
+++ b/progs/openvg/demos/lion.c
@@ -86,13 +86,13 @@ make_x_window(Display *x_dpy, EGLDisplay egl_dpy,
    scrnum = DefaultScreen( x_dpy );
    root = RootWindow( x_dpy, scrnum );
 
-   if (!eglChooseConfig( egl_dpy, attribs, &config, 1, &num_configs)) {
+   if (!eglChooseConfig( egl_dpy, attribs, &config, 1, &num_configs) ||
+       !num_configs) {
       printf("Error: couldn't get an EGL visual config\n");
       exit(1);
    }
 
    assert(config);
-   assert(num_configs > 0);
 
    if (!eglGetConfigAttrib(egl_dpy, config, EGL_NATIVE_VISUAL_ID, &vid)) {
       printf("Error: eglGetConfigAttrib() failed\n");
diff --git a/progs/openvg/trivial/eglcommon.c b/progs/openvg/trivial/eglcommon.c
index dcec1ac4a4..0316e596c6 100644
--- a/progs/openvg/trivial/eglcommon.c
+++ b/progs/openvg/trivial/eglcommon.c
@@ -61,13 +61,13 @@ make_x_window(Display *x_dpy, EGLDisplay egl_dpy,
    scrnum = DefaultScreen( x_dpy );
    root = RootWindow( x_dpy, scrnum );
 
-   if (!eglChooseConfig( egl_dpy, attribs, &config, 1, &num_configs)) {
+   if (!eglChooseConfig( egl_dpy, attribs, &config, 1, &num_configs) ||
+       !num_configs) {
       printf("Error: couldn't get an EGL visual config\n");
       exit(1);
    }
 
    assert(config);
-   assert(num_configs > 0);
 
    if (!eglGetConfigAttrib(egl_dpy, config, EGL_NATIVE_VISUAL_ID, &vid)) {
       printf("Error: eglGetConfigAttrib() failed\n");