summaryrefslogtreecommitdiff
path: root/src/gallium/include/pipe
diff options
context:
space:
mode:
Diffstat (limited to 'src/gallium/include/pipe')
-rw-r--r--src/gallium/include/pipe/p_format.h31
1 files changed, 23 insertions, 8 deletions
diff --git a/src/gallium/include/pipe/p_format.h b/src/gallium/include/pipe/p_format.h
index f90087b3c9..d09b6dbefc 100644
--- a/src/gallium/include/pipe/p_format.h
+++ b/src/gallium/include/pipe/p_format.h
@@ -38,13 +38,14 @@ extern "C" {
#endif
/**
- * The PIPE_FORMAT is a 32-bit wide bitfield that encodes all the information
- * needed to uniquely describe a pixel format.
+ * The pipe_format enum is a 32-bit wide bitfield that encodes all the
+ * information needed to uniquely describe a pixel format.
*/
/**
- * Possible format layouts -- occupy first 2 bits. The interpretation of
- * the remaining 30 bits depends on a particual format layout.
+ * Possible format layouts are encoded in the first 2 bits.
+ * The interpretation of the remaining 30 bits depends on a particular
+ * format layout.
*/
#define PIPE_FORMAT_LAYOUT_RGBAZS 0
#define PIPE_FORMAT_LAYOUT_YCBCR 1
@@ -286,6 +287,7 @@ enum pipe_format {
/**
+ * Unsigned 8-bit stencil format.
* XXX should remove this, but S8_UNORM is a poor name
*/
#define PIPE_FORMAT_U_S8 PIPE_FORMAT_S8_UNORM
@@ -294,11 +296,12 @@ enum pipe_format {
/**
* Builds pipe format name from format token.
*/
-static INLINE char *pf_sprint_name( char *str, uint format )
+static INLINE char *pf_sprint_name( char *str, enum pipe_format format )
{
strcpy( str, "PIPE_FORMAT_" );
switch (pf_layout( format )) {
- case PIPE_FORMAT_LAYOUT_RGBAZS: {
+ case PIPE_FORMAT_LAYOUT_RGBAZS:
+ {
pipe_format_rgbazs_t rgbazs = (pipe_format_rgbazs_t) format;
uint i;
uint scale = 1 << (pf_exp8( rgbazs ) * 3);
@@ -362,7 +365,8 @@ static INLINE char *pf_sprint_name( char *str, uint format )
}
}
break;
- case PIPE_FORMAT_LAYOUT_YCBCR: {
+ case PIPE_FORMAT_LAYOUT_YCBCR:
+ {
pipe_format_ycbcr_t ycbcr = (pipe_format_ycbcr_t) format;
strcat( str, "YCBCR" );
@@ -375,6 +379,10 @@ static INLINE char *pf_sprint_name( char *str, uint format )
return str;
}
+/**
+ * Return bits for a particular component.
+ * \param comp component index, starting at 0
+ */
static INLINE uint pf_get_component_bits( enum pipe_format format, uint comp )
{
uint size;
@@ -397,6 +405,9 @@ static INLINE uint pf_get_component_bits( enum pipe_format format, uint comp )
return size << (pf_exp8(format) * 3);
}
+/**
+ * Return total bits needed for the pixel format.
+ */
static INLINE uint pf_get_bits( enum pipe_format format )
{
if (pf_layout(format) == PIPE_FORMAT_LAYOUT_RGBAZS) {
@@ -417,7 +428,11 @@ static INLINE uint pf_get_bits( enum pipe_format format )
}
}
-static INLINE uint pf_get_size( enum pipe_format format ) {
+/**
+ * Return bytes per pixel for the given format.
+ */
+static INLINE uint pf_get_size( enum pipe_format format )
+{
assert(pf_get_bits(format) % 8 == 0);
return pf_get_bits(format) / 8;
}