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authorJosé Fonseca <[email protected]>2010-04-01 19:00:03 +0100
committerJosé Fonseca <[email protected]>2010-04-01 19:01:46 +0100
commit7e1aceaf0a1fb7b4ee44c7bc488f03b584b8b785 (patch)
tree36cc1782e1dfbbf362bc0a3ff1195d20f4d60b6f /src/gallium/auxiliary
parent13d2f3c7380be6cf476d56269c17b52c53f313b3 (diff)
llvmpipe: Support sampling from PIPE_FORMAT_R32_FLOAT.
Diffstat (limited to 'src/gallium/auxiliary')
-rw-r--r--src/gallium/auxiliary/gallivm/lp_bld_format_soa.c46
1 files changed, 43 insertions, 3 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_format_soa.c b/src/gallium/auxiliary/gallivm/lp_bld_format_soa.c
index e5153a4bbbd..9f242844e5a 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_format_soa.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_format_soa.c
@@ -80,6 +80,24 @@ lp_build_format_swizzle_soa(const struct util_format_description *format_desc,
}
+/**
+ * Unpack several pixels in SoA.
+ *
+ * It takes a vector of packed pixels:
+ *
+ * packed = {P0, P1, P2, P3, ..., Pn}
+ *
+ * And will produce four vectors:
+ *
+ * red = {R0, R1, R2, R3, ..., Rn}
+ * green = {G0, G1, G2, G3, ..., Gn}
+ * blue = {B0, B1, B2, B3, ..., Bn}
+ * alpha = {A0, A1, A2, A3, ..., An}
+ *
+ * It requires that a packed pixel fits into an element of the output
+ * channels. The common case is when converting pixel with a depth of 32 bit or
+ * less into floats.
+ */
void
lp_build_unpack_rgba_soa(LLVMBuilderRef builder,
const struct util_format_description *format_desc,
@@ -91,11 +109,13 @@ lp_build_unpack_rgba_soa(LLVMBuilderRef builder,
unsigned start;
unsigned chan;
- /* FIXME: Support more formats */
- assert(format_desc->is_bitmask);
+ /* FIXME: Support more pixel formats */
assert(format_desc->block.width == 1);
assert(format_desc->block.height == 1);
- assert(format_desc->block.bits <= 32);
+ assert(format_desc->block.bits <= type.width);
+ /* FIXME: Support more output types */
+ assert(type.floating);
+ assert(type.width == 32);
/* Decode the input vector components */
start = 0;
@@ -188,7 +208,27 @@ lp_build_unpack_rgba_soa(LLVMBuilderRef builder,
break;
+ case UTIL_FORMAT_TYPE_FLOAT:
+ if (type.floating) {
+ assert(start == 0);
+ assert(stop == 32);
+ assert(type.width == 32);
+ input = LLVMBuildBitCast(builder, input, lp_build_vec_type(type), "");
+ }
+ else {
+ /* FIXME */
+ assert(0);
+ input = lp_build_undef(type);
+ }
+ break;
+
+ case UTIL_FORMAT_TYPE_FIXED:
+ assert(0);
+ input = lp_build_undef(type);
+ break;
+
default:
+ assert(0);
input = lp_build_undef(type);
break;
}