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authorJosé Fonseca <[email protected]>2009-11-06 12:04:20 +0000
committerJosé Fonseca <[email protected]>2009-11-06 12:06:44 +0000
commit244591ae7b2582a1d1f5d2fdc2d3812643104eb9 (patch)
tree8b022fcaa3ddeb3c810a943d061e3cdd78effa99
parent25728860fcb65b53cf7212d54d39a01a3dc90a49 (diff)
gallium: Add UNSYNCHRONIZED cpu access flag. Document others.
-rw-r--r--src/gallium/include/pipe/p_defines.h59
1 files changed, 57 insertions, 2 deletions
diff --git a/src/gallium/include/pipe/p_defines.h b/src/gallium/include/pipe/p_defines.h
index 6a61aea8fd7..fd14dc8e92d 100644
--- a/src/gallium/include/pipe/p_defines.h
+++ b/src/gallium/include/pipe/p_defines.h
@@ -225,9 +225,10 @@ enum pipe_transfer_usage {
};
-/**
+/*
* Buffer usage flags
*/
+
#define PIPE_BUFFER_USAGE_CPU_READ (1 << 0)
#define PIPE_BUFFER_USAGE_CPU_WRITE (1 << 1)
#define PIPE_BUFFER_USAGE_GPU_READ (1 << 2)
@@ -236,9 +237,63 @@ enum pipe_transfer_usage {
#define PIPE_BUFFER_USAGE_VERTEX (1 << 5)
#define PIPE_BUFFER_USAGE_INDEX (1 << 6)
#define PIPE_BUFFER_USAGE_CONSTANT (1 << 7)
+
+/*
+ * CPU access flags.
+ *
+ * These flags should only be used for texture transfers or when mapping
+ * buffers.
+ *
+ * Note that the PIPE_BUFFER_USAGE_CPU_xxx flags above are also used for
+ * mapping. Either PIPE_BUFFER_USAGE_CPU_READ or PIPE_BUFFER_USAGE_CPU_WRITE
+ * must be set.
+ */
+
+/**
+ * Discards the memory within the mapped region.
+ *
+ * It should not be used with PIPE_BUFFER_USAGE_CPU_READ.
+ *
+ * See also:
+ * - OpenGL's ARB_map_buffer_range extension, MAP_INVALIDATE_RANGE_BIT flag.
+ * - Direct3D's D3DLOCK_DISCARD flag.
+ */
#define PIPE_BUFFER_USAGE_DISCARD (1 << 8)
+
+/**
+ * Fail if the resource cannot be mapped immediately.
+ *
+ * See also:
+ * - Direct3D's D3DLOCK_DONOTWAIT flag.
+ * - Mesa3D's MESA_MAP_NOWAIT_BIT flag.
+ * - WDDM's D3DDDICB_LOCKFLAGS.DonotWait flag.
+ */
#define PIPE_BUFFER_USAGE_DONTBLOCK (1 << 9)
-#define PIPE_BUFFER_USAGE_FLUSH_EXPLICIT (1 << 10) /**< See pipe_screen::buffer_flush_mapped_range */
+
+/**
+ * Do not attempt to synchronize pending operations on the resource when mapping.
+ *
+ * It should not be used with PIPE_BUFFER_USAGE_CPU_READ.
+ *
+ * See also:
+ * - OpenGL's ARB_map_buffer_range extension, MAP_UNSYNCHRONIZED_BIT flag.
+ * - Direct3D's D3DLOCK_NOOVERWRITE flag.
+ * - WDDM's D3DDDICB_LOCKFLAGS.IgnoreSync flag.
+ */
+#define PIPE_BUFFER_USAGE_UNSYNCHRONIZED (1 << 10)
+
+/**
+ * Written ranges will be notified later with
+ * pipe_screen::buffer_flush_mapped_range.
+ *
+ * It should not be used with PIPE_BUFFER_USAGE_CPU_READ.
+ *
+ * See also:
+ * - pipe_screen::buffer_flush_mapped_range
+ * - OpenGL's ARB_map_buffer_range extension, MAP_FLUSH_EXPLICIT_BIT flag.
+ */
+#define PIPE_BUFFER_USAGE_FLUSH_EXPLICIT (1 << 11)
+
/** Pipe driver custom usage flags should be greater or equal to this value */
#define PIPE_BUFFER_USAGE_CUSTOM (1 << 16)