llvmpipe: Split the format swizzling step from the unpacking.

2 files changed, 34 insertions, 16 deletions

diff --git a/src/gallium/drivers/llvmpipe/lp_bld_format.h b/src/gallium/drivers/llvmpipe/lp_bld_format.h
index 42ee3c7d903..8b08c016c00 100644
--- a/src/gallium/drivers/llvmpipe/lp_bld_format.h
+++ b/src/gallium/drivers/llvmpipe/lp_bld_format.h
@@ -42,6 +42,13 @@ struct util_format_description;
 struct lp_type;
 
 
+void
+lp_build_format_swizzle_soa(const struct util_format_description *format_desc,
+                            struct lp_type type,
+                            const LLVMValueRef *unswizzled,
+                            LLVMValueRef *swizzled);
+
+
 /**
  * Unpack a pixel into its RGBA components.
  *
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_format_soa.c b/src/gallium/drivers/llvmpipe/lp_bld_format_soa.c
index 60ad4c0ee65..64151d169da 100644
--- a/src/gallium/drivers/llvmpipe/lp_bld_format_soa.c
+++ b/src/gallium/drivers/llvmpipe/lp_bld_format_soa.c
@@ -35,16 +35,16 @@
 
 
 static LLVMValueRef
-lp_build_format_swizzle(struct lp_type type,
-                        const LLVMValueRef *inputs,
-                        enum util_format_swizzle swizzle)
+lp_build_format_swizzle_chan_soa(struct lp_type type,
+                                 const LLVMValueRef *unswizzled,
+                                 enum util_format_swizzle swizzle)
 {
    switch (swizzle) {
    case UTIL_FORMAT_SWIZZLE_X:
    case UTIL_FORMAT_SWIZZLE_Y:
    case UTIL_FORMAT_SWIZZLE_Z:
    case UTIL_FORMAT_SWIZZLE_W:
-      return inputs[swizzle];
+      return unswizzled[swizzle];
    case UTIL_FORMAT_SWIZZLE_0:
       return lp_build_zero(type);
    case UTIL_FORMAT_SWIZZLE_1:
@@ -59,6 +59,28 @@ lp_build_format_swizzle(struct lp_type type,
 
 
 void
+lp_build_format_swizzle_soa(const struct util_format_description *format_desc,
+                            struct lp_type type,
+                            const LLVMValueRef *unswizzled,
+                            LLVMValueRef *swizzled)
+{
+   if(format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS) {
+      enum util_format_swizzle swizzle = format_desc->swizzle[0];
+      LLVMValueRef depth = lp_build_format_swizzle_chan_soa(type, unswizzled, swizzle);
+      swizzled[2] = swizzled[1] = swizzled[0] = depth;
+      swizzled[3] = lp_build_one(type);
+   }
+   else {
+      unsigned chan;
+      for (chan = 0; chan < 4; ++chan) {
+         enum util_format_swizzle swizzle = format_desc->swizzle[chan];
+         swizzled[chan] = lp_build_format_swizzle_chan_soa(type, unswizzled, swizzle);
+      }
+   }
+}
+
+
+void
 lp_build_unpack_rgba_soa(LLVMBuilderRef builder,
                          const struct util_format_description *format_desc,
                          struct lp_type type,
@@ -123,16 +145,5 @@ lp_build_unpack_rgba_soa(LLVMBuilderRef builder,
       start = stop;
    }
 
-   if(format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS) {
-      enum util_format_swizzle swizzle = format_desc->swizzle[0];
-      LLVMValueRef depth = lp_build_format_swizzle(type, inputs, swizzle);
-      rgba[2] = rgba[1] = rgba[0] = depth;
-      rgba[3] = lp_build_one(type);
-   }
-   else {
-      for (chan = 0; chan < 4; ++chan) {
-         enum util_format_swizzle swizzle = format_desc->swizzle[chan];
-         rgba[chan] = lp_build_format_swizzle(type, inputs, swizzle);
-      }
-   }
+   lp_build_format_swizzle_soa(format_desc, type, inputs, rgba);
 }