static void buffer_create_buffer_object	(	struct wined3d_buffer *	This,
		const struct wined3d_gl_info *	gl_info
	)		`[static]`
Definition at line 116 of file buffer.c.
Referenced by buffer_get_memory(), and wined3d_buffer_preload().
{
    GLenum error, gl_usage;

    TRACE("Creating an OpenGL vertex buffer object for wined3d_buffer %p with usage %s.\n",
            This, debug_d3dusage(This->resource.usage));

    ENTER_GL();

    /* Make sure that the gl error is cleared. Do not use checkGLcall
    * here because checkGLcall just prints a fixme and continues. However,
    * if an error during VBO creation occurs we can fall back to non-vbo operation
    * with full functionality(but performance loss)
    */
    while (glGetError() != GL_NO_ERROR);

    /* Basically the FVF parameter passed to CreateVertexBuffer is no good.
     * The vertex declaration from the device determines how the data in the
     * buffer is interpreted. This means that on each draw call the buffer has
     * to be verified to check if the rhw and color values are in the correct
     * format. */

    GL_EXTCALL(glGenBuffersARB(1, &This->buffer_object));
    error = glGetError();
    if (!This->buffer_object || error != GL_NO_ERROR)
    {
        ERR("Failed to create a VBO with error %s (%#x)\n", debug_glerror(error), error);
        LEAVE_GL();
        goto fail;
    }

    if (This->buffer_type_hint == GL_ELEMENT_ARRAY_BUFFER_ARB)
        device_invalidate_state(This->resource.device, STATE_INDEXBUFFER);
    GL_EXTCALL(glBindBufferARB(This->buffer_type_hint, This->buffer_object));
    error = glGetError();
    if (error != GL_NO_ERROR)
    {
        ERR("Failed to bind the VBO with error %s (%#x)\n", debug_glerror(error), error);
        LEAVE_GL();
        goto fail;
    }

    /* Don't use static, because dx apps tend to update the buffer
     * quite often even if they specify 0 usage.
     */
    if(This->resource.usage & WINED3DUSAGE_DYNAMIC)
    {
        TRACE("Gl usage = GL_STREAM_DRAW_ARB\n");
        gl_usage = GL_STREAM_DRAW_ARB;

        if(gl_info->supported[APPLE_FLUSH_BUFFER_RANGE])
        {
            GL_EXTCALL(glBufferParameteriAPPLE(This->buffer_type_hint, GL_BUFFER_FLUSHING_UNMAP_APPLE, GL_FALSE));
            checkGLcall("glBufferParameteriAPPLE(This->buffer_type_hint, GL_BUFFER_FLUSHING_UNMAP_APPLE, GL_FALSE)");
            This->flags |= WINED3D_BUFFER_FLUSH;

            GL_EXTCALL(glBufferParameteriAPPLE(This->buffer_type_hint, GL_BUFFER_SERIALIZED_MODIFY_APPLE, GL_FALSE));
            checkGLcall("glBufferParameteriAPPLE(This->buffer_type_hint, GL_BUFFER_SERIALIZED_MODIFY_APPLE, GL_FALSE)");
            This->flags |= WINED3D_BUFFER_APPLESYNC;
        }
        /* No setup is needed here for GL_ARB_map_buffer_range */
    }
    else
    {
        TRACE("Gl usage = GL_DYNAMIC_DRAW_ARB\n");
        gl_usage = GL_DYNAMIC_DRAW_ARB;
    }

    /* Reserve memory for the buffer. The amount of data won't change
     * so we are safe with calling glBufferData once and
     * calling glBufferSubData on updates. Upload the actual data in case
     * we're not double buffering, so we can release the heap mem afterwards
     */
    GL_EXTCALL(glBufferDataARB(This->buffer_type_hint, This->resource.size, This->resource.allocatedMemory, gl_usage));
    error = glGetError();
    LEAVE_GL();
    if (error != GL_NO_ERROR)
    {
        ERR("glBufferDataARB failed with error %s (%#x)\n", debug_glerror(error), error);
        goto fail;
    }

    This->buffer_object_size = This->resource.size;
    This->buffer_object_usage = gl_usage;

    if(This->flags & WINED3D_BUFFER_DOUBLEBUFFER)
    {
        if(!buffer_add_dirty_area(This, 0, 0))
        {
            ERR("buffer_add_dirty_area failed, this is not expected\n");
            goto fail;
        }
    }
    else
    {
        HeapFree(GetProcessHeap(), 0, This->resource.heapMemory);
        This->resource.allocatedMemory = NULL;
        This->resource.heapMemory = NULL;
    }

    return;

fail:
    /* Clean up all vbo init, but continue because we can work without a vbo :-) */
    ERR("Failed to create a vertex buffer object. Continuing, but performance issues may occur\n");
    delete_gl_buffer(This, gl_info);
    buffer_clear_dirty_areas(This);
}
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