glGetBufferParameteriv() with GL_ELEMENT_ARRAY_BUFFER

Hi

When I check my VBO buffer size with:


        int vBufferSize = mVertexCount * 3 * Buffers.SIZEOF_FLOAT; // = (3xnumTris)x(3 for vertex x,y,z)xfloat size
        gl2.glBindBuffer(GL2.GL_ARRAY_BUFFER,mVBO);  // Bind The Buffer
        gl2.glBufferData(GL.GL_ARRAY_BUFFER, vBufferSize, mVertices, GL2.GL_STATIC_DRAW); // Load The Data - "Static" means the data in VBO will not be changed (specified once and used many times)
        gl2.glBindVertexArray(0);
       
        // check vertex buffer size
        gl2.glGetBufferParameteriv(GL2.GL_ARRAY_BUFFER, GL2.GL_BUFFER_SIZE,GLArrays.iarray1,0);
        int actualBufferSize = GLArrays.iarray1[0];
        int expectedBufferSize = mVertexCount * 3 * Buffers.SIZEOF_FLOAT;
        if (actualBufferSize != expectedBufferSize)
        {
            return false;
        }


it works fine. However, when I check the size of the vertex indices buffer using similar code it always returns the allocated buffer size of 3?:


        int indicesBufferSize = numberTriangles * 3 * Buffers.SIZEOF_INT;
        gl2.glBindBuffer(GL2.GL_ELEMENT_ARRAY_BUFFER,mVBOIndices);  // bind the buffer
        gl2.glBufferData(GL.GL_ELEMENT_ARRAY_BUFFER, indicesBufferSize, mVertexIndices, GL2.GL_STATIC_DRAW);
        gl2.glBindBuffer(GL2.GL_ELEMENT_ARRAY_BUFFER, 0);
       
        // check buffer size
        gl2.glGetBufferParameteriv(GL2.GL_ELEMENT_ARRAY_BUFFER,GL2.GL_BUFFER_SIZE,GLArrays.iarray1,0);
        actualBufferSize = GLArrays.iarray1[0];
        expectedBufferSize = numberTriangles * 3 * Buffers.SIZEOF_INT;
        if (actualBufferSize != expectedBufferSize)
        {
            return false;
        }


I checked the standard:

http://www.opengl.org/sdk/docs/man/xhtml/glGetBufferParameteriv.xml

and GL_ELEMENT_ARRAY_BUFFER is a valid argument to glGetBufferParameteriv().

Thanks

Graham

On Friday, December 09, 2011 06:01:21 PM gmseed [via jogamp] wrote:
I dunno, we simply pass 'public void glGetBufferParameteriv(int target, int pname, int[] params, int params_offset)'
the call to the native GL impl, no wrapping or caching here.

Post your platform specs .. (-> FAQ),
maybe a unit test for me to pull .. so we can see how it behaves on other systems.

Nevertheless it's always recommended to cache such values in your application/API layer
since those GL glGet*() methods may be expensive and issue a flush/sync on the pipeline.

~Sven

> Thanks
>
> Graham

Hi

Below is the command-line output after running \etc\test.bat as outlined on the FAQ page.

I'm using Windows and think there is a problem with the dump info.

Looks like newt has to be installed before test.bat can be run. The contents of test.log is:

"Error: Could not find or load main class com.jogamp.newt.opengl.GLWindow"

Graham

====running test.bat====

04/11/2011  19:48    <DIR>          .
04/11/2011  19:48    <DIR>          ..
16/09/2011  11:50             3,217 profile.jogl
16/09/2011  11:50             1,121 test.bat
16/09/2011  11:50             2,338 test.sh
               3 File(s)          6,676 bytes
               2 Dir(s)  383,760,338,944 bytes free

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64\etc>test.bat

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64\etc>set BLD_DIR=jar

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64\etc>set LIB_DIR=lib

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64\etc>set CP_ALL=.;jar\gluegen-rt.jar;jar\nativewindow.all.jar;
jar\jogl.all.jar;jar\newt.all.jar

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64\etc>echo CP_ALL .;jar\gluegen-rt.jar;jar\nativewindow.all.jar
;jar\jogl.all.jar;jar\newt.all.jar
CP_ALL .;jar\gluegen-rt.jar;jar\nativewindow.all.jar;jar\jogl.all.jar;jar\newt.all.jar

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64\etc>set X_ARGS="-Dsun.java2d.noddraw=true" "-Dsun.awt.noerase
background=true"

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64\etc>REM java -classpath .;jar\gluegen-rt.jar;jar\nativewindow
.all.jar;jar\jogl.all.jar;jar\newt.all.jar "-Djava.library.path=lib" "-Dsun.java2d.noddraw=true" "-Dsun.awt.noerasebackg
round=true" javax.media.opengl.awt.GLCanvas > java-win64.log 2>&1

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64\etc>REM java -classpath .;jar\gluegen-rt.jar;jar\nativewindow
.all.jar;jar\jogl.all.jar;jar\newt.all.jar "-Djava.library.path=lib" "-Dsun.java2d.noddraw=true" "-Dsun.awt.noerasebackg
round=true" com.jogamp.common.GlueGenVersion > test.log 2>&1

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64\etc>REM java -classpath .;jar\gluegen-rt.jar;jar\nativewindow
.all.jar;jar\jogl.all.jar;jar\newt.all.jar "-Djava.library.path=lib" "-Dsun.java2d.noddraw=true" "-Dsun.awt.noerasebackg
round=true" com.jogamp.nativewindow.NativeWindowVersion >> test.log 2>&1

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64\etc>REM java -classpath .;jar\gluegen-rt.jar;jar\nativewindow
.all.jar;jar\jogl.all.jar;jar\newt.all.jar "-Djava.library.path=lib" "-Dsun.java2d.noddraw=true" "-Dsun.awt.noerasebackg
round=true" com.jogamp.opengl.JoglVersion >> test.log 2>&1

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64\etc>REM java -classpath .;jar\gluegen-rt.jar;jar\nativewindow
.all.jar;jar\jogl.all.jar;jar\newt.all.jar "-Djava.library.path=lib" "-Dsun.java2d.noddraw=true" "-Dsun.awt.noerasebackg
round=true" com.jogamp.newt.NewtVersion >> test.log 2>&1

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64\etc>REM java -classpath .;jar\gluegen-rt.jar;jar\nativewindow
.all.jar;jar\jogl.all.jar;jar\newt.all.jar "-Djava.library.path=lib" "-Dsun.java2d.noddraw=true" "-Dsun.awt.noerasebackg
round=true" com.jogamp.newt.opengl.GLCanvas >> test.log 2>&1

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64\etc>java -classpath .;jar\gluegen-rt.jar;jar\nativewindow.all
.jar;jar\jogl.all.jar;jar\newt.all.jar "-Djava.library.path=lib" "-Dsun.java2d.noddraw=true" "-Dsun.awt.noerasebackgroun
d=true" com.jogamp.newt.opengl.GLWindow  1>>test.log 2>&1

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64\etc>type test.log
Error: Could not find or load main class com.jogamp.newt.opengl.GLWindow

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64\etc>

On Saturday, December 10, 2011 03:34:26 PM gmseed [via jogamp] wrote:
>
> Hi
>
> Below is the command-line output after running \etc\test.bat as outlined on
> the FAQ page.
>
> I'm using Windows and think there is a problem with the dump info. Does newt
> have to installed?

NEWT is included - always. I have also updates the test.* scripts in etc,
however it should work if your start it as advertised:

http://jogamp.org/wiki/index.php/Jogamp_Versioning_and_Releases#Runtime_Version_Check

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64> etc\test.bat

~Sven

Hi

I haven't updated to your fix but you suggest it should already work if I do as stated on your website and in your reply.

Here's the result:

===
C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64>etc\test.bat

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64>set BLD_DIR=jar

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64>set LIB_DIR=lib

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64>set CP_ALL=.;jar\gluegen-rt.jar;jar\nativewindow.all.jar;
jogl.all.jar;jar\newt.all.jar

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64>echo CP_ALL .;jar\gluegen-rt.jar;jar\nativewindow.all.jar
\jogl.all.jar;jar\newt.all.jar
CP_ALL .;jar\gluegen-rt.jar;jar\nativewindow.all.jar;jar\jogl.all.jar;jar\newt.all.jar

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64>set X_ARGS="-Dsun.java2d.noddraw=true" "-Dsun.awt.noerase
ground=true"

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64>REM java -classpath .;jar\gluegen-rt.jar;jar\nativewindow
.jar;jar\jogl.all.jar;jar\newt.all.jar "-Djava.library.path=lib" "-Dsun.java2d.noddraw=true" "-Dsun.awt.noerasebackg
d=true" javax.media.opengl.awt.GLCanvas > java-win64.log 2>&1

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64>REM java -classpath .;jar\gluegen-rt.jar;jar\nativewindow
.jar;jar\jogl.all.jar;jar\newt.all.jar "-Djava.library.path=lib" "-Dsun.java2d.noddraw=true" "-Dsun.awt.noerasebackg
d=true" com.jogamp.common.GlueGenVersion > test.log 2>&1

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64>REM java -classpath .;jar\gluegen-rt.jar;jar\nativewindow
.jar;jar\jogl.all.jar;jar\newt.all.jar "-Djava.library.path=lib" "-Dsun.java2d.noddraw=true" "-Dsun.awt.noerasebackg
d=true" com.jogamp.nativewindow.NativeWindowVersion >> test.log 2>&1

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64>REM java -classpath .;jar\gluegen-rt.jar;jar\nativewindow
.jar;jar\jogl.all.jar;jar\newt.all.jar "-Djava.library.path=lib" "-Dsun.java2d.noddraw=true" "-Dsun.awt.noerasebackg
d=true" com.jogamp.opengl.JoglVersion >> test.log 2>&1

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64>REM java -classpath .;jar\gluegen-rt.jar;jar\nativewindow
.jar;jar\jogl.all.jar;jar\newt.all.jar "-Djava.library.path=lib" "-Dsun.java2d.noddraw=true" "-Dsun.awt.noerasebackg
d=true" com.jogamp.newt.NewtVersion >> test.log 2>&1

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64>REM java -classpath .;jar\gluegen-rt.jar;jar\nativewindow
.jar;jar\jogl.all.jar;jar\newt.all.jar "-Djava.library.path=lib" "-Dsun.java2d.noddraw=true" "-Dsun.awt.noerasebackg
d=true" com.jogamp.newt.opengl.GLCanvas >> test.log 2>&1

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64>java -classpath .;jar\gluegen-rt.jar;jar\nativewindow.all
;jar\jogl.all.jar;jar\newt.all.jar "-Djava.library.path=lib" "-Dsun.java2d.noddraw=true" "-Dsun.awt.noerasebackgroun
ue" com.jogamp.newt.opengl.GLWindow  1>>test.log 2>&1

C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64>type test.log
java.lang.NoClassDefFoundError: com/jogamp/common/type/WriteCloneable
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(Unknown Source)
        at java.security.SecureClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.access$100(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(Unknown Source)
        at java.security.SecureClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.access$100(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.Class.getDeclaredMethods0(Native Method)
        at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
        at java.lang.Class.getMethod0(Unknown Source)
        at java.lang.Class.getMethod(Unknown Source)
        at sun.launcher.LauncherHelper.getMainMethod(Unknown Source)
        at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
Caused by: java.lang.ClassNotFoundException: com.jogamp.common.type.WriteCloneable
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        ... 30 more
Exception in thread "main"
C:\jogl_win_amd64\libs\jogl-2.0-b41-20110916-windows-amd64>

This is only slightly off topic but does anyone know why the exception in your last post occurs?

Caused by: java.lang.ClassNotFoundException: com.jogamp.common.type.WriteCloneable

I haven't found a helpful discussion of this problem yet.

Sorry, no sooner than I sent this off, I found the answer in this forum.
Sometimes you just have to use the right keyword.

Can you remind me how you fixed that? I assume there was a conflict with another version.