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hide GL_ARB_texture_compression from non-VSA cards

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This commit is contained in:
Daniel Borca
2004-08-20 08:34:30 +00:00
parent 14c532f767
commit d4edb53201
1 changed files with 16 additions and 23 deletions
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src/mesa/drivers/glide/fxdd.c
+16 -23
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@@ -1902,26 +1902,6 @@ fxDDInitExtensions(GLcontext * ctx)
_mesa_enable_extension( ctx, "GL_EXT_stencil_wrap" );
}
/* [dBorca] Hack alert:
* True texture compression can be done only on Napalm.
* We will advertise, however, generic texture compression
* on all Voodoo cards; the Mesa logic allows us to eventually
* fallback to uncompressed. This will fix those dumb applications
* which refuse to run w/o texture compression! We actually _can_
* do texture compression for pre-Napalm cores, through NCC. But
* NCC poses many issues:
* 1) NCC w/o DITHER_ERR has poor quality and NCC w/ DITHER_ERR is
* damn slow!
* 2) NCC compression cannot be used with multitexturing, because
* the decompression tables are not per TMU anymore (bear in mind
* that earlier Voodoos could handle 2 NCC tables for each TMU --
* just look for POINTCAST_PALETTE). As a last resort, we could
* fake NCC multitexturing through multipass rendering, but...
* ohwell, it's not worth the effort...
* This stand true for multitexturing palletized textures.
* 3) since NCC is not an OpenGL standard (as opposed to FXT1/DXTC), we
* can't use precompressed textures!
*/
if (fxMesa->type >= GR_SSTTYPE_Voodoo4) {
_mesa_enable_extension(ctx, "GL_ARB_texture_compression");
_mesa_enable_extension(ctx, "GL_3DFX_texture_compression_FXT1");
@@ -1929,14 +1909,27 @@ fxDDInitExtensions(GLcontext * ctx)
_mesa_enable_extension(ctx, "GL_S3_s3tc");
_mesa_enable_extension(ctx, "GL_NV_blend_square");
} else {
#if FX_TC_NCC
/* [dBorca] Hack alert:
* 1) NCC w/o DITHER_ERR has poor quality and NCC w/ DITHER_ERR is
* damn slow!
* 2) NCC compression cannot be used with multitexturing, because
* the decompression tables are not per TMU anymore (bear in mind
* that earlier Voodoos could handle 2 NCC tables for each TMU --
* just look for POINTCAST_PALETTE). As a last resort, we could
* fake NCC multitexturing through multipass rendering, but...
* ohwell, it's not worth the effort...
* This stand true for multitexturing palletized textures.
* 3) since NCC is not an OpenGL standard (as opposed to FXT1/DXTC), we
* can't use precompressed textures!
*/
if (fxMesa->HaveTexus2) {
_mesa_enable_extension(ctx, "GL_ARB_texture_compression");
}
#if FX_TC_NCC
else
#endif
#else
/* doesn't like texture compression */
_mesa_enable_extension(ctx, "GL_SGIS_generate_mipmap");
#endif
}
if (fxMesa->HaveCmbExt) {