glBufferData mem error

[TheoW03]

Version

3.2.3

Platform

Windows x86

JDK

Java 17

Module

openGL

Bug description

glBufferData(int target, Buffer (FloatBuffer,Intbuffer...) data, int usage);

has a memory error.

       int[] buffer = new int[2];
        int location = glGetAttribLocation(shaderProgram, "position");

        glGenBuffers(buffer);
        glBindBuffer(GL_ARRAY_BUFFER, buffer[0]);

        glVertexAttribPointer(location, 3, GL_FLOAT, false, 0, 0);
        glBufferData(GL_ARRAY_BUFFER, FloatBuffer.wrap(vertices),GL_STATIC_DRAW);

here is the full usage that caused this.

vertices - being an array of 12 floats between -1,1. its the points to draw a square.

shaderProgram - compiled and linked shader program.

Stacktrace or crash log output

Events (20 events):
Event: 0.163 loading class jdk/internal/reflect/UnsafeQualifiedStaticObjectFieldAccessorImpl done
Event: 0.166 loading class java/nio/BufferOverflowException
Event: 0.166 loading class java/nio/BufferOverflowException done
Event: 0.166 loading class java/nio/InvalidMarkException
Event: 0.166 loading class java/nio/InvalidMarkException done
Event: 0.166 loading class java/nio/BufferUnderflowException
Event: 0.166 loading class java/nio/BufferUnderflowException done
Event: 0.184 loading class java/lang/NoSuchFieldError
Event: 0.184 loading class java/lang/NoSuchFieldError done
Event: 0.188 loading class jdk/internal/reflect/UnsafeQualifiedStaticIntegerFieldAccessorImpl
Event: 0.188 loading class jdk/internal/reflect/UnsafeQualifiedStaticIntegerFieldAccessorImpl done
Event: 0.457 loading class jdk/internal/misc/ScopedMemoryAccess$Scope
Event: 0.457 loading class jdk/internal/misc/ScopedMemoryAccess$Scope done
Event: 0.461 Loaded shared library
openGL.dll
Event: 0.593 loading class jdk/internal/reflect/UnsafeQualifiedLongFieldAccessorImpl
Event: 0.594 loading class jdk/internal/reflect/UnsafeQualifiedFieldAccessorImpl
Event: 0.594 loading class jdk/internal/reflect/UnsafeQualifiedFieldAccessorImpl done
Event: 0.594 loading class jdk/internal/reflect/UnsafeQualifiedLongFieldAccessorImpl done
Event: 0.646 loading class java/nio/HeapFloatBuffer
Event: 0.646 loading class java/nio/HeapFloatBuffer done

[TheoW03]

one of the solutions I have is to may be have a size param instead of just sending the Buffer in with no size

the error doesn't occur with

glBufferData(int target, Array (float[],int[]...) data, int usage);

[octylFractal]

You need to use a direct buffer, see https://github.com/LWJGL/lwjgl3-wiki/wiki/1.3.-Memory-FAQ#how-do-i-allocate-and-deallocate-buffers.

[TheoW03]

the problem still continues when i implement it, like this.

try (MemoryStack stack = stackPush()) {
            IntBuffer ip = stack.callocInt(1);
            glGenBuffers(ip);
            buffer[0] = ip.get(0);
        } // stack automatically popped, ip memory automatically reclaimed
        glBindBuffer(GL_ARRAY_BUFFER, buffer[0]);

        glVertexAttribPointer(location, 3, GL_FLOAT, false, 0, 0);
        glBufferData(GL_ARRAY_BUFFER, FloatBuffer.wrap(vertices),GL_STATIC_DRAW);

[TheoW03]

i did run the debugger, and it does crash around glBufferData.

[octylFractal]

Your code is still using FloatBuffer.wrap, which allocates a heap, and not direct, buffer.

[TheoW03]

that worked.