Mesa (master): util: Added util_format_is_array.
Jose Fonseca
jrfonseca at kemper.freedesktop.org
Fri Jun 29 11:24:15 UTC 2012
Module: Mesa
Branch: master
Commit: 34075d4133f83e6fec31a62ee4b1b3c565abda56
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=34075d4133f83e6fec31a62ee4b1b3c565abda56
Author: James Benton <jbenton at vmware.com>
Date: Fri May 18 17:27:19 2012 +0100
util: Added util_format_is_array.
This function checks whether a format description is in a simple array format.
Reviewed-by: Jose Fonseca <jfonseca at vmware.com>
---
src/gallium/auxiliary/util/u_format.c | 32 ++++++++++++++++++++++++++++++++
src/gallium/auxiliary/util/u_format.h | 7 +++++++
2 files changed, 39 insertions(+), 0 deletions(-)
diff --git a/src/gallium/auxiliary/util/u_format.c b/src/gallium/auxiliary/util/u_format.c
index cfc4a17..6f45298 100644
--- a/src/gallium/auxiliary/util/u_format.c
+++ b/src/gallium/auxiliary/util/u_format.c
@@ -159,6 +159,38 @@ util_format_is_pure_uint(enum pipe_format format)
}
boolean
+util_format_is_array(const struct util_format_description *desc)
+{
+ unsigned chan;
+
+ if (desc->layout != UTIL_FORMAT_LAYOUT_PLAIN ||
+ desc->colorspace != UTIL_FORMAT_COLORSPACE_RGB ||
+ desc->block.width != 1 ||
+ desc->block.height != 1) {
+ return FALSE;
+ }
+
+ for (chan = 0; chan < desc->nr_channels; ++chan) {
+ if (desc->swizzle[chan] != chan)
+ return FALSE;
+
+ if (desc->channel[chan].type != desc->channel[0].type)
+ return FALSE;
+
+ if (desc->channel[chan].normalized != desc->channel[0].normalized)
+ return FALSE;
+
+ if (desc->channel[chan].pure_integer != desc->channel[0].pure_integer)
+ return FALSE;
+
+ if (desc->channel[chan].size != desc->channel[0].size)
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+boolean
util_format_is_luminance_alpha(enum pipe_format format)
{
const struct util_format_description *desc =
diff --git a/src/gallium/auxiliary/util/u_format.h b/src/gallium/auxiliary/util/u_format.h
index 1718fb5..e35e164 100644
--- a/src/gallium/auxiliary/util/u_format.h
+++ b/src/gallium/auxiliary/util/u_format.h
@@ -591,6 +591,13 @@ boolean
util_format_is_pure_uint(enum pipe_format format);
/**
+ * Whether the format is a simple array format where all channels
+ * are of the same type and can be loaded from memory as a vector
+ */
+boolean
+util_format_is_array(const struct util_format_description *desc);
+
+/**
* Check if the src format can be blitted to the destination format with
* a simple memcpy. For example, blitting from RGBA to RGBx is OK, but not
* the reverse.
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