From e4ef724e06621be9325fc41ed886fd404467fdc0 Mon Sep 17 00:00:00 2001 From: marha Date: Thu, 31 Oct 2013 08:40:01 +0100 Subject: fontconfig glproto libX11 mesa xserver xkeyboard-config git update 31 oct 2013 xserver commit 902ff0b3497d202b86bf9a411e17db7b694d6eaa xkeyboard-config commit 70bbf18d6cddb7271db1b2e042765ace3c4ac485 libX11 commit 6cb02b166361200da35ba14f52cd9aaa493eb0ea glproto commit aacc7a51b6161c765b04524e0d2ab31e5e586834 fontconfig commit 525a135ccf53e4bf3363c3143d9cfdf15fba55ab mesa commit b16b3c8703f198ca0f025b730d582600df79c19c --- mesalib/src/gallium/auxiliary/util/u_format.c | 41 +++++++++++++++++++++++++++ mesalib/src/gallium/auxiliary/util/u_format.h | 11 +++++++ 2 files changed, 52 insertions(+) (limited to 'mesalib/src/gallium/auxiliary/util') diff --git a/mesalib/src/gallium/auxiliary/util/u_format.c b/mesalib/src/gallium/auxiliary/util/u_format.c index a8aa5719d..9ef3bb53f 100644 --- a/mesalib/src/gallium/auxiliary/util/u_format.c +++ b/mesalib/src/gallium/auxiliary/util/u_format.c @@ -208,6 +208,47 @@ util_format_is_supported(enum pipe_format format, unsigned bind) } +/** + * Calculates the MRD for the depth format. MRD is used in depth bias + * for UNORM and unbound depth buffers. When the depth buffer is floating + * point, the depth bias calculation does not use the MRD. However, the + * default MRD will be 1.0 / ((1 << 24) - 1). + */ +double +util_get_depth_format_mrd(enum pipe_format format) +{ + struct util_format_description *format_desc; + /* + * Depth buffer formats without a depth component OR scenarios + * without a bound depth buffer default to D24. + */ + double mrd = 1.0 / ((1 << 24) - 1); + unsigned depth_channel; + + format_desc = (struct util_format_description *) + util_format_description(format); + + assert(format_desc); + + /* + * Some depth formats do not store the depth component in the first + * channel, detect the format and adjust the depth channel. Get the + * swizzled depth component channel. + */ + depth_channel = format_desc->swizzle[0]; + + if (format_desc->channel[depth_channel].type == UTIL_FORMAT_TYPE_UNSIGNED && + format_desc->channel[depth_channel].normalized) { + int depth_bits; + + depth_bits = format_desc->channel[depth_channel].size; + mrd = 1.0 / ((1ULL << depth_bits) - 1); + } + + return mrd; +} + + void util_format_read_4f(enum pipe_format format, float *dst, unsigned dst_stride, diff --git a/mesalib/src/gallium/auxiliary/util/u_format.h b/mesalib/src/gallium/auxiliary/util/u_format.h index 84f16d503..dc777c35c 100644 --- a/mesalib/src/gallium/auxiliary/util/u_format.h +++ b/mesalib/src/gallium/auxiliary/util/u_format.h @@ -544,6 +544,17 @@ util_format_is_depth_and_stencil(enum pipe_format format) util_format_has_stencil(desc); } + +/** + * Calculates the MRD for the depth format. MRD is used in depth bias + * for UNORM and unbound depth buffers. When the depth buffer is floating + * point, the depth bias calculation does not use the MRD. However, the + * default MRD will be 1.0 / ((1 << 24) - 1). + */ +double +util_get_depth_format_mrd(enum pipe_format format); + + /** * Return whether this is an RGBA, Z, S, or combined ZS format. * Useful for initializing pipe_blit_info::mask. -- cgit v1.2.3