nvfx: refactor sampling code, add support for swizzles and depth tex

This is a significant refactoring of the sampling code that:
- Moves all generic functions in nvfx_fragtex.c
- Adds a driver-specific sampler view structure and uses it to
  precompute texture setup as it should be done
- Unifies a bit more of code between nv30 and nv40
- Adds support for sampler view swizzles
- Support for specifying as sampler view format different from the
  resource one (only trivially)
- Support for sampler view specification of first and last level
- Support for depth textures on nv30, both for reading depth and
  for compare
- Support for sRGB textures
- Unifies the format table between nv30 and nv40
- Expands the format table to include essentially all supportable formats
  except mixed sign and "autonormal" formats
- Fixes the "is format supported" logic, which was quite broken, and
  makes it use the format table

Only tested on nv30 currently.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/gallium/drivers/nouveau/nouveau_class.h b/src/gallium/drivers/nouveau/nouveau_class.h
index adfdd37b1b6..685fa00b455 100644
--- a/src/gallium/drivers/nouveau/nouveau_class.h
+++ b/src/gallium/drivers/nouveau/nouveau_class.h
@@ -6328,6 +6328,10 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #define    NV34TCL_TX_FORMAT_FORMAT_R8G8B8_RECT						0x00001e00
 #define    NV34TCL_TX_FORMAT_FORMAT_A8L8_RECT						0x00002000
 #define    NV34TCL_TX_FORMAT_FORMAT_DSDT8						0x00002800
+#define    NV34TCL_TX_FORMAT_FORMAT_Z24							0x2a00
+#define    NV34TCL_TX_FORMAT_FORMAT_Z24_RECT						0x2b00 /* XXX: guess! */
+#define    NV34TCL_TX_FORMAT_FORMAT_Z16							0x2c00
+#define    NV34TCL_TX_FORMAT_FORMAT_Z16_RECT						0x2d00 /* XXX: guess! */
 #define    NV34TCL_TX_FORMAT_FORMAT_HILO16						0x00003300
 #define    NV34TCL_TX_FORMAT_FORMAT_HILO16_RECT						0x00003600
 #define    NV34TCL_TX_FORMAT_FORMAT_HILO8						0x00004400