- /* Polygon offset depends on the zbuffer bit depth. */
- if (state->zsbuf && r300->polygon_offset_enabled) {
- switch (util_format_get_blocksize(state->zsbuf->texture->format)) {
- case 2:
- zbuffer_bpp = 16;
- break;
- case 4:
- zbuffer_bpp = 24;
- break;
+ r300->z_compression = false;
+
+ if (state->zsbuf) {
+ blocksize = util_format_get_blocksize(state->zsbuf->texture->format);
+ switch (blocksize) {
+ case 2:
+ zbuffer_bpp = 16;
+ break;
+ case 4:
+ zbuffer_bpp = 24;
+ break;
+ }
+ if (can_hyperz) {
+ struct r300_surface *zs_surf = r300_surface(state->zsbuf);
+ struct r300_texture *tex;
+ int compress = r300->screen->caps.is_rv350 ? RV350_Z_COMPRESS_88 : R300_Z_COMPRESS_44;
+ int level = zs_surf->base.level;
+
+ tex = r300_texture(zs_surf->base.texture);
+
+ /* work out whether we can support hiz on this buffer */
+ r300_hiz_alloc_block(r300, zs_surf);
+
+ /* work out whether we can support zmask features on this buffer */
+ r300_zmask_alloc_block(r300, zs_surf, compress);
+
+ if (tex->zmask_mem[level]) {
+ /* compression causes hangs on 16-bit */
+ if (zbuffer_bpp == 24)
+ r300->z_compression = compress;
+ }
+ DBG(r300, DBG_HYPERZ,
+ "hyper-z features: hiz: %d @ %08x z-compression: %d z-fastfill: %d @ %08x\n", tex->hiz_mem[level] ? 1 : 0,
+ tex->hiz_mem[level] ? tex->hiz_mem[level]->ofs : 0xdeadbeef,
+ r300->z_compression, tex->zmask_mem[level] ? 1 : 0,
+ tex->zmask_mem[level] ? tex->zmask_mem[level]->ofs : 0xdeadbeef);