Merge branch 'master' of ssh://git.freedesktop.org/git/mesa/mesa into pipe-video

[mesa.git] / src / gallium / auxiliary / util / u_format_parse.py

diff --git a/src/gallium/auxiliary/util/u_format_parse.py b/src/gallium/auxiliary/util/u_format_parse.py
index 250926418ecbd55ebcf80352005f4e5951fa2529..ddb9f2443d9b805fba7b9b78f77940c59fa230c0 100755 (executable)
--- a/src/gallium/auxiliary/util/u_format_parse.py
+++ b/src/gallium/auxiliary/util/u_format_parse.py
@@ -43,7 +43,7 @@ ZS = 'zs'
 
 
 def is_pot(x):
-   return (x & (x - 1)) == 0;
+   return (x & (x - 1)) == 0
 
 
 VERY_LARGE = 99999999999999999999999
@@ -73,18 +73,22 @@ class Channel:
         '''Maximum representable number.'''
         if self.type == FLOAT:
             return VERY_LARGE
+        if self.type == FIXED:
+            return (1 << (self.size/2)) - 1
         if self.norm:
             return 1
         if self.type == UNSIGNED:
             return (1 << self.size) - 1
         if self.type == SIGNED:
-            return self.size - 1
+            return (1 << (self.size - 1)) - 1
         assert False
     
     def min(self):
         '''Minimum representable number.'''
         if self.type == FLOAT:
             return -VERY_LARGE
+        if self.type == FIXED:
+            return -(1 << (self.size/2))
         if self.type == UNSIGNED:
             return 0
         if self.norm:
@@ -134,6 +138,8 @@ class Format:
         return nr_channels
 
     def is_array(self):
+        if self.layout != PLAIN:
+            return False
         ref_channel = self.channels[0]
         for channel in self.channels[1:]:
             if channel.size and (channel.size != ref_channel.size or channel.size % 8):
@@ -141,7 +147,11 @@ class Format:
         return True
 
     def is_mixed(self):
+        if self.layout != PLAIN:
+            return False
         ref_channel = self.channels[0]
+        if ref_channel.type == VOID:
+           ref_channel = self.channels[1]
         for channel in self.channels[1:]:
             if channel.type != VOID:
                 if channel.type != ref_channel.type:
@@ -154,29 +164,29 @@ class Format:
         return is_pot(self.block_size())
 
     def is_int(self):
+        if self.layout != PLAIN:
+            return False
         for channel in self.channels:
             if channel.type not in (VOID, UNSIGNED, SIGNED):
                 return False
         return True
 
     def is_float(self):
+        if self.layout != PLAIN:
+            return False
         for channel in self.channels:
             if channel.type not in (VOID, FLOAT):
                 return False
         return True
 
     def is_bitmask(self):
-        if self.block_size() > 32:
+        if self.layout != PLAIN:
             return False
-        if not self.is_pot():
+        if self.block_size() not in (8, 16, 32):
             return False
         for channel in self.channels:
-            if not is_pot(channel.size):
-                return True
             if channel.type not in (VOID, UNSIGNED, SIGNED):
                 return False
-            if channel.size >= 32:
-                return False
         return True
 
     def inv_swizzles(self):