diff options
| -rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_format_soa.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_format_soa.c b/src/gallium/auxiliary/gallivm/lp_bld_format_soa.c index a2b0298a1c7..e1b94adc85a 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_format_soa.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_format_soa.c @@ -89,6 +89,11 @@ lp_build_format_swizzle_soa(const struct util_format_description *format_desc, * 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. + * + * \param format_desc the format of the 'packed' incoming pixel vector + * \param type the desired type for rgba_out (type.length = n, above) + * \param packed the incoming vector of packed pixels + * \param rgba_out returns the SoA R,G,B,A vectors */ void lp_build_unpack_rgba_soa(LLVMBuilderRef builder, @@ -115,8 +120,8 @@ lp_build_unpack_rgba_soa(LLVMBuilderRef builder, /* Decode the input vector components */ start = 0; for (chan = 0; chan < format_desc->nr_channels; ++chan) { - unsigned width = format_desc->channel[chan].size; - unsigned stop = start + width; + const unsigned width = format_desc->channel[chan].size; + const unsigned stop = start + width; LLVMValueRef input; input = packed; @@ -247,9 +252,10 @@ lp_build_unpack_rgba_soa(LLVMBuilderRef builder, /** - * Fetch a pixel into a SoA. + * Fetch a texels from a texture, returning them in SoA layout. * - * \param type the desired return type for 'rgba' + * \param type the desired return type for 'rgba'. The vector length + * is the number of texels to fetch * * \param base_ptr points to start of the texture image block. For non- * compressed formats, this simply points to the texel. @@ -290,6 +296,7 @@ lp_build_fetch_rgba_soa(LLVMBuilderRef builder, /* * gather the texels from the texture + * Ex: packed = {BGRA, BGRA, BGRA, BGRA}. */ packed = lp_build_gather(builder, type.length, |