Roland Scheidegger wrote:
Index: texcompress.c
===================================================================
RCS file: /cvsroot/mesa3d/Mesa-newtree/src/mesa/main/texcompress.c,v
retrieving revision 1.9
diff -u -r1.9 texcompress.c
--- texcompress.c 21 Nov 2003 09:56:50 -0000 1.9
+++ texcompress.c 18 Dec 2003 00:54:43 -0000
@@ -59,6 +59,9 @@
}
}
if (ctx->Extensions.EXT_texture_compression_s3tc) {
+ /* quick hack. don't announce s3tc formats, hopefully noone then will try to
+ compress textures despite having the s3tc extension */
+#if !MESA_S3TC
if (formats) {
formats[n++] = GL_COMPRESSED_RGB_S3TC_DXT1_EXT;
/* Skip this one because it has a restriction (all transparent
@@ -72,6 +75,7 @@
else {
n += 3;
}
+#endif
}
if (ctx->Extensions.S3_s3tc) {
if (formats) {
This is wrong, and may break valid applications. The supported compressed formats should be listed no matter what. However, if the requested internal format is compressed and the type does not match, the driver is free to ignore the requested internal format. Technically speaking, if ARB_texture_compression is supported, applications don't need to check for other extensions. They only need to query GL_COMPRESSED_TEXTURE_FORMATS_ARB and choose an available format that they like.
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