bit depth value incorrect

john.preston · September 6, 2004, 3:48pm

Hi, I am having a problem getting the gl.glGetIntegerv(GL.GL_DEPTH_BITS, depth); function to return the number of bits of the video card correctly. I’m running under linux and the card is setup with 24 bits as shown in the display properties window using YAST.

However jogl return a value of 16 in the variable depth using the call gl.glGetIntegerv(GL.GL_DEPTH_BITS, depth);

Also there is an error setting the pbuffer context. Any ideas.

[INFO thread=AWT-EventQueue-0, class=jgrass.module.monitor.MapRenderer, method=init] initialising jogl drawing canvas, size=[798 x 267], doublebuffer=true, stereoview=false, maximum viewport=[2048 x 2048], maximum texture=[1024 x 1024], depth bits=16, GL vendor=[Mesa project: www.mesa3d.org], GL version=[1.2 (1.4 Mesa 5.0.2)], GL renderer=[Mesa GLX Indirect], extensions=[GL_ARB_depth_texture GL_ARB_imaging GL_ARB_multitexture GL_ARB_point_parameters GL_ARB_shadow GL_ARB_shadow_ambient GL_ARB_texture_border_clamp GL_ARB_texture_cube_map GL_ARB_texture_env_add GL_ARB_texture_env_combine GL_ARB_texture_env_crossbar GL_ARB_texture_env_dot3 GL_ARB_texture_mirrored_repeat GL_ARB_transpose_matrix GL_ARB_window_pos GL_EXT_abgr GL_EXT_bgra GL_EXT_blend_color GL_EXT_blend_func_separate GL_EXT_blend_logic_op GL_EXT_blend_minmax GL_EXT_blend_subtract GL_EXT_clip_volume_hint GL_EXT_copy_texture GL_EXT_draw_range_elements GL_EXT_fog_coord GL_EXT_multi_draw_arrays GL_EXT_packed_pixels GL_EXT_polygon_offset GL_EXT_rescale_normal GL_EXT_secondary_color GL_EXT_separate_specular_color GL_EXT_shadow_funcs GL_EXT_stencil_two_side GL_EXT_stencil_wrap GL_EXT_subtexture GL_EXT_texture GL_EXT_texture3D GL_EXT_texture_edge_clamp GL_EXT_texture_env_add GL_EXT_texture_env_combine GL_EXT_texture_env_dot3 GL_EXT_texture_lod_bias GL_EXT_texture_object GL_EXT_texture_rectangle GL_EXT_vertex_array GL_APPLE_packed_pixels GL_ATI_texture_mirror_once GL_ATI_texture_env_combine3 GL_IBM_texture_mirrored_repeat GL_MESA_pack_invert GL_MESA_ycbcr_texture GL_NV_blend_square GL_NV_point_sprite GL_NV_texgen_reflection GL_NV_texture_rectangle GL_SGIS_generate_mipmap GL_SGIS_texture_border_clamp GL_SGIS_texture_edge_clamp GL_SGIS_texture_lod GL_SGIX_depth_texture GL_SGIX_shadow GL_SGIX_shadow_ambient ], canCreateOffscreenDrawable=true
[INFO thread=AWT-EventQueue-0, class=jgrass.module.monitor.MapRenderer, method=init] allocating texture id[2] for surface texture.
[DEBUG thread=AWT-EventQueue-0, class=jgrass.module.monitor.MapRenderer, method=init] forcing offscreen drawable initialisation.
net.java.games.jogl.GLException: pbuffer creation error: glXChooseFBConfig() failed
at net.java.games.jogl.impl.x11.X11PbufferGLContext.createPbuffer(X11PbufferGLContext.java:175)
at net.java.games.jogl.impl.x11.X11OnscreenGLContext.makeCurrent(X11OnscreenGLContext.java:117)
at net.java.games.jogl.impl.GLContext.invokeGL(GLContext.java:162)
at net.java.games.jogl.GLCanvas.reshape(GLCanvas.java:105)
at java.awt.Component.setBounds(Component.java:1664)
at java.awt.BorderLayout.layoutContainer(BorderLayout.java:691)
at java.awt.Container.layout(Container.java:1020)
at java.awt.Container.doLayout(Container.java:1010)
at java.awt.Container.validateTree(Container.java:1092)
at java.awt.Container.validateTree(Container.java:1099)
at java.awt.Container.validateTree(Container.java:1099)
at java.awt.Container.validateTree(Container.java:1099)
at java.awt.Container.validateTree(Container.java:1099)
at java.awt.Container.validateTree(Container.java:1099)
at java.awt.Container.validateTree(Container.java:1099)
at java.awt.Container.validateTree(Container.java:1099)
at java.awt.Container.validateTree(Container.java:1099)
at java.awt.Container.validateTree(Container.java:1099)
at java.awt.Container.validate(Container.java:1067)
at javax.swing.RepaintManager.validateInvalidComponents(RepaintManager.java:353)
at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:116)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:454)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)
net.java.games.jogl.GLException: Error making context current
at net.java.games.jogl.impl.x11.X11GLContext.makeCurrent(X11GLContext.java:141)
at net.java.games.jogl.impl.x11.X11OnscreenGLContext.makeCurrent(X11OnscreenGLContext.java:111)
at net.java.games.jogl.impl.GLContext.invokeGL(GLContext.java:162)
at net.java.games.jogl.GLCanvas.displayImpl(GLCanvas.java:182)
at net.java.games.jogl.GLCanvas.display(GLCanvas.java:82)
at net.java.games.jogl.GLCanvas.paint(GLCanvas.java:89)
at sun.awt.RepaintArea.paint(RepaintArea.java:177)
at sun.awt.motif.MComponentPeer.handleEvent(MComponentPeer.java:405)
at java.awt.Component.dispatchEventImpl(Component.java:3678)
at java.awt.Component.dispatchEvent(Component.java:3477)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:456)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)
net.java.games.jogl.GLException: Error making context current
at net.java.games.jogl.impl.x11.X11GLContext.makeCurrent(X11GLContext.java:141)
at net.java.games.jogl.impl.x11.X11OnscreenGLContext.makeCurrent(X11OnscreenGLContext.java:111)
at net.java.games.jogl.impl.GLContext.invokeGL(GLContext.java:162)
at net.java.games.jogl.GLCanvas.displayImpl(GLCanvas.java:182)
at net.java.games.jogl.GLCanvas.display(GLCanvas.java:82)
at net.java.games.jogl.GLCanvas.paint(GLCanvas.java:89)
at sun.awt.RepaintArea.paint(RepaintArea.java:177)
at sun.awt.motif.MComponentPeer.handleEvent(MComponentPeer.java:405)
at java.awt.Component.dispatchEventImpl(Component.java:3678)
at java.awt.Component.dispatchEvent(Component.java:3477)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:456)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)

John

john.preston · September 6, 2004, 6:24pm

Just an additional bit of info. When I displaythe GLcapabilities after creating the canvas I get the correct 24 bit depth. So why does jogl only return 16 via the gl.glGetIntegerv(GL.GL_DEPTH_BITS, depth) call.

GLCapabilities [DoubleBuffered: true, Stereo: false, HardwareAccelerated: true, DepthBits: 24, StencilBits: 0, Red: 8, Green: 8, Blue: 8, Alpha: 0, Red Accum: 0, Green Accum: 0, Blue Accum: 0, Alpha Accum: 0 ]

John

kbr · September 7, 2004, 8:05pm

Currently I don’t think we provide a way to query the exact GLCapabilities object for a created GLDrawable. This is a bug and please feel free to file it on the JOGL Issue Tracker. The glGetIntegerv call with GL_DEPTH_BITS should be returning the correct value.

Regarding pbuffer creation, the report that you are using the Mesa indirect renderer in the output below seems to indicate that you aren’t getting hardware acceleration, which you probably need for pbuffer support. However, JOGL should either fail more gracefully in this case or report that pbuffer support isn’t available. Please feel free to file a bug on this issue as well.