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Diffstat (limited to 'mesalib/src/gallium/auxiliary/util')
-rw-r--r--mesalib/src/gallium/auxiliary/util/u_format.c16
-rw-r--r--mesalib/src/gallium/auxiliary/util/u_format.h18
-rw-r--r--mesalib/src/gallium/auxiliary/util/u_math.h13
3 files changed, 36 insertions, 11 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_format.c b/mesalib/src/gallium/auxiliary/util/u_format.c
index 9ef3bb53f..6b602bf32 100644
--- a/mesalib/src/gallium/auxiliary/util/u_format.c
+++ b/mesalib/src/gallium/auxiliary/util/u_format.c
@@ -215,9 +215,8 @@ util_format_is_supported(enum pipe_format format, unsigned bind)
* default MRD will be 1.0 / ((1 << 24) - 1).
*/
double
-util_get_depth_format_mrd(enum pipe_format format)
+util_get_depth_format_mrd(const struct util_format_description *desc)
{
- struct util_format_description *format_desc;
/*
* Depth buffer formats without a depth component OR scenarios
* without a bound depth buffer default to D24.
@@ -225,23 +224,20 @@ util_get_depth_format_mrd(enum pipe_format format)
double mrd = 1.0 / ((1 << 24) - 1);
unsigned depth_channel;
- format_desc = (struct util_format_description *)
- util_format_description(format);
-
- assert(format_desc);
+ assert(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];
+ depth_channel = desc->swizzle[0];
- if (format_desc->channel[depth_channel].type == UTIL_FORMAT_TYPE_UNSIGNED &&
- format_desc->channel[depth_channel].normalized) {
+ if (desc->channel[depth_channel].type == UTIL_FORMAT_TYPE_UNSIGNED &&
+ desc->channel[depth_channel].normalized) {
int depth_bits;
- depth_bits = format_desc->channel[depth_channel].size;
+ depth_bits = desc->channel[depth_channel].size;
mrd = 1.0 / ((1ULL << depth_bits) - 1);
}
diff --git a/mesalib/src/gallium/auxiliary/util/u_format.h b/mesalib/src/gallium/auxiliary/util/u_format.h
index 369c3994a..0fbaf4cc1 100644
--- a/mesalib/src/gallium/auxiliary/util/u_format.h
+++ b/mesalib/src/gallium/auxiliary/util/u_format.h
@@ -546,13 +546,29 @@ util_format_is_depth_and_stencil(enum pipe_format format)
/**
+ * Calculates the depth format type based upon the incoming format description.
+ */
+static INLINE unsigned
+util_get_depth_format_type(const struct util_format_description *desc)
+{
+ unsigned depth_channel = desc->swizzle[0];
+ if (desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS &&
+ depth_channel != UTIL_FORMAT_SWIZZLE_NONE) {
+ return desc->channel[depth_channel].type;
+ } else {
+ return UTIL_FORMAT_TYPE_VOID;
+ }
+}
+
+
+/**
* 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);
+util_get_depth_format_mrd(const struct util_format_description *desc);
/**
diff --git a/mesalib/src/gallium/auxiliary/util/u_math.h b/mesalib/src/gallium/auxiliary/util/u_math.h
index f5c14ef8d..426d5daa7 100644
--- a/mesalib/src/gallium/auxiliary/util/u_math.h
+++ b/mesalib/src/gallium/auxiliary/util/u_math.h
@@ -246,6 +246,19 @@ union di {
/**
+ * Extract the IEEE float32 exponent.
+ */
+static INLINE signed
+util_get_float32_exponent(float x) {
+ union fi f;
+
+ f.f = x;
+
+ return ((f.ui >> 23) & 0xff) - 127;
+}
+
+
+/**
* Fast version of 2^x
* Identity: exp2(a + b) = exp2(a) * exp2(b)
* Let ipart = int(x)