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authorKeith Whitwell <keith@tungstengraphics.com>2007-08-21 12:54:41 +0200
committerMichel Dänzer <michel@tungstengraphics.com>2007-08-21 12:54:41 +0200
commit2a9be6165100cf7b7c204dfdf79e8d52fb02eb65 (patch)
tree767495baad01f25361f0e4ee9e9c6d09a19d0bdf
parenta7658124975d75704ed43ee41423a3678de6ef63 (diff)
i915tex: Document zone rendering related definitions.i915tex-zone-rendering
-rw-r--r--src/mesa/drivers/dri/i915tex/i915_reg.h10
1 files changed, 9 insertions, 1 deletions
diff --git a/src/mesa/drivers/dri/i915tex/i915_reg.h b/src/mesa/drivers/dri/i915tex/i915_reg.h
index adeaa1dabc6..a9fa56e8a60 100644
--- a/src/mesa/drivers/dri/i915tex/i915_reg.h
+++ b/src/mesa/drivers/dri/i915tex/i915_reg.h
@@ -112,6 +112,13 @@
/* 3DSTATE_CHROMA_KEY */
/* 3DSTATE_CLEAR_PARAMETERS, p150 */
+/*
+ * Sets the color, depth and stencil clear values used by the
+ * CLEAR_RECT and ZONE_INIT primitive types, respectively. These
+ * primitives set override most 3d state and only take a minimal x/y
+ * vertex. The color/z/stencil information is supplied here and
+ * therefore cannot vary per vertex.
+ */
#define _3DSTATE_CLEAR_PARAMETERS (CMD_3D | (0x1d<<24) | (0x9c<<16) | 5)
/* Dword 1 */
#define CLEARPARAM_CLEAR_RECT (1 << 16)
@@ -432,7 +439,8 @@
#define S7_DEPTH_OFFSET_CONST_MASK ~0
-
+/* Helper macros for blend factors
+ */
#define DST_BLND_FACT(f) ((f)<<S6_CBUF_DST_BLEND_FACT_SHIFT)
#define SRC_BLND_FACT(f) ((f)<<S6_CBUF_SRC_BLEND_FACT_SHIFT)
#define DST_ABLND_FACT(f) ((f)<<IAB_DST_FACTOR_SHIFT)