Textures: Why no GL_REPLACE in RH7.1?

OpenGL
1

I have recently installed RedHat 7.1, with XFree86 4.03.

When I user texture mapping with GL_REPLACE I get an error message “Invalid value”. The same applies for GL_REPLACE_EXT.

Any suggestions why this feature has not been implemented ? It does exist in the utah-glx and SGI implementations.

Adrian

2

GL_REPLACE_EXT is in glext.h

As for GL_REPLACE, it lives in /usr/X11R6/include/GL/gl.h for me. I’m using a stock XFree86 installation.

Sure you’re including the right header files?

3

Thank you.
GL_REPLACE is in gl.h and
GL_REPLACE_EXT is in glext.h

Both are not listed in the texture mapping sections.
The command: glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
compiles without a problem, but at run time reports that an invalid value is being passed. If I switch REPLACE to
MODULATE then the program works ok, but with slightly diffferent functionality.

Any further suggestions ?
Has MESA deviated from OpenGL slightly ?
Is there an official MESA man page somewhere ?

Adrian

4

Oh, sorry, I misunderstood your original question.

I don’t know why it would say “Illegal value”… but the Mesa page is http://www.mesa3d.org/

5

hmm you might have to uodate your mesa, check if your mesa implementation is Opengl1.21 if not GL_REPLACE is not supoorted.

Chris

6

Are you refering to the Mesa version (3.4.1) or the glx version (1.2).

Why is this no longer supported ?

I am porting code from a SGI-O2 which uses GL_REPLACE, what is the approved replacement…

Here are my glxinfo details…
[…]$ glxinfo

display: :0.0 screen:0
direct rendering: Yes
server glx vendor string: SGI
server glx version string: 1.2
server glx extensions:
GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_EXT_import_context
client glx vendor string: SGI
client glx version string: 1.2
client glx extensions:
GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_EXT_import_context,
GLX_ARB_get_proc_address
GLX extensions:
GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_EXT_import_context
OpenGL vendor string: Precision Insight, Inc.
OpenGL renderer string: Mesa DRI G400 20000510
OpenGL version string: 1.2 Mesa 3.4
OpenGL extensions:
GL_ARB_multitexture, GL_ARB_tranpose_matrix, GL_EXT_abgr,
GL_EXT_blend_func_separate, GL_EXT_clip_volume_hint,
GL_EXT_compiled_vertex_array, GL_EXT_histogram, GL_EXT_packed_pixels,
GL_EXT_polygon_offset, GL_EXT_rescale_normal, GL_EXT_stencil_wrap,
GL_EXT_texture3D, GL_EXT_texture_env_add, GL_EXT_texture_object,
GL_EXT_vertex_array, GL_MESA_window_pos, GL_MESA_resize_buffers,
GL_NV_texgen_reflection, GL_PGI_misc_hints, GL_SGIS_pixel_texture,
GL_SGIS_texture_edge_clamp
glu version: 1.1 Mesa 3.4.1
glu extensions:
GL_EXT_abgr

visual x bf lv rg d st colorbuffer ax dp st accumbuffer ms cav
id dep cl sp sz l ci b ro r g b a bf th cl r g b a ns b eat

0x23 16 tc 0 16 0 r y . 5 6 5 0 0 16 0 0 0 0 0 0 0 None
0x24 16 tc 0 16 0 r . . 5 6 5 0 0 16 0 0 0 0 0 0 0 None
0x25 16 tc 0 16 0 r y . 5 6 5 0 0 16 8 0 0 0 0 0 0 Slow
0x26 16 tc 0 16 0 r . . 5 6 5 0 0 16 8 0 0 0 0 0 0 Slow
0x27 16 tc 0 16 0 r y . 5 6 5 0 0 16 0 16 16 16 0 0 0 Slow
0x28 16 tc 0 16 0 r . . 5 6 5 0 0 16 0 16 16 16 0 0 0 Slow
0x29 16 tc 0 16 0 r y . 5 6 5 0 0 16 8 16 16 16 0 0 0 Slow
0x2a 16 tc 0 16 0 r . . 5 6 5 0 0 16 8 16 16 16 0 0 0 Slow
0x2b 16 dc 0 16 0 r y . 5 6 5 0 0 16 0 0 0 0 0 0 0 None
0x2c 16 dc 0 16 0 r . . 5 6 5 0 0 16 0 0 0 0 0 0 0 None
0x2d 16 dc 0 16 0 r y . 5 6 5 0 0 16 8 0 0 0 0 0 0 Slow
0x2e 16 dc 0 16 0 r . . 5 6 5 0 0 16 8 0 0 0 0 0 0 Slow
0x2f 16 dc 0 16 0 r y . 5 6 5 0 0 16 0 16 16 16 0 0 0 Slow
0x30 16 dc 0 16 0 r . . 5 6 5 0 0 16 0 16 16 16 0 0 0 Slow
0x31 16 dc 0 16 0 r y . 5 6 5 0 0 16 8 16 16 16 0 0 0 Slow
0x32 16 dc 0 16 0 r . . 5 6 5 0 0 16 8 16 16 16 0 0 0 Slow

7

I belive that it is an error in the driver. Try the latest driver instead.

8

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