Reserve 10 bits in sort key for view.

src/bgfx_p.h

@@ -787,9 +787,10 @@ namespace bgfx
 		uint8_t m_buffer[BGFX_CONFIG_MAX_COMMAND_BUFFER_SIZE];
 	};
 
-#define SORT_KEY_NUM_BITS_TRANS        2
+//
+#define SORK_KEY_NUM_BITS_VIEW         10
 
-#define SORT_KEY_VIEW_SHIFT            56
+#define SORT_KEY_VIEW_SHIFT            (64-SORK_KEY_NUM_BITS_VIEW)
 #define SORT_KEY_VIEW_MASK             ( (uint64_t(BGFX_CONFIG_MAX_VIEWS-1) )<<SORT_KEY_VIEW_SHIFT)
 
 #define SORT_KEY_DRAW_BIT_SHIFT        (SORT_KEY_VIEW_SHIFT - 1)
@@ -806,6 +807,8 @@ namespace bgfx
 #define SORT_KEY_DRAW_TYPE_SEQUENCE    (UINT64_C(2)<<SORT_KEY_DRAW_TYPE_BIT_SHIFT)
 
 //
+#define SORT_KEY_NUM_BITS_TRANS        2
+
 #define SORT_KEY_DRAW_0_TRANS_SHIFT    (SORT_KEY_DRAW_TYPE_BIT_SHIFT - SORT_KEY_NUM_BITS_TRANS)
 #define SORT_KEY_DRAW_0_TRANS_MASK     (UINT64_C(0x3)<<SORT_KEY_DRAW_0_TRANS_SHIFT)
 
@@ -842,7 +845,7 @@ namespace bgfx
 #define SORT_KEY_COMPUTE_PROGRAM_SHIFT (SORT_KEY_COMPUTE_SEQ_SHIFT - BGFX_CONFIG_SORT_KEY_NUM_BITS_PROGRAM)
 #define SORT_KEY_COMPUTE_PROGRAM_MASK  ( (uint64_t(BGFX_CONFIG_MAX_PROGRAMS-1) )<<SORT_KEY_COMPUTE_PROGRAM_SHIFT)
 
-	BX_STATIC_ASSERT(BGFX_CONFIG_MAX_VIEWS <= 256);
+	BX_STATIC_ASSERT(BGFX_CONFIG_MAX_VIEWS <= (1<<SORK_KEY_NUM_BITS_VIEW) );
 	BX_STATIC_ASSERT( (BGFX_CONFIG_MAX_PROGRAMS & (BGFX_CONFIG_MAX_PROGRAMS-1) ) == 0); // Must be power of 2.
 	BX_STATIC_ASSERT( (0 // Render key mask shouldn't overlap.
 		| SORT_KEY_VIEW_MASK