[devel] Minor revision of commentary about png_set_alpha_mode().
diff --git a/ANNOUNCE b/ANNOUNCE
index 5d0546f..6663232 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -102,7 +102,7 @@
Implemented premultiplied alpha support: png_set_alpha_mode API
Version 1.5.3beta07 [May 9, 2011]
- Added expand_16 suppport to the high level interface.
+ Added expand_16 support to the high level interface.
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diff --git a/CHANGES b/CHANGES
index 8dca281..d40d01a 100644
--- a/CHANGES
+++ b/CHANGES
@@ -3361,7 +3361,7 @@
Implemented premultiplied alpha support: png_set_alpha_mode API
Version 1.5.3beta07 [May 9, 2011]
- Added expand_16 suppport to the high level interface.
+ Added expand_16 support to the high level interface.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit
diff --git a/png.h b/png.h
index 418c317..fb188d7 100644
--- a/png.h
+++ b/png.h
@@ -1084,7 +1084,7 @@
#endif
#ifdef PNG_READ_EXPAND_16_SUPPORTED
-/* Expand to 16 bit channels, forces conversion of palette to RGB and expansion
+/* Expand to 16-bit channels, forces conversion of palette to RGB and expansion
* of a tRNS chunk if present.
*/
PNG_EXPORT(221, void, png_set_expand_16, (png_structp png_ptr));
@@ -1136,11 +1136,11 @@
* storing color channel values that have been scaled by the alpha. The
* advantage is that the color channels can be resampled (the image can be
* scaled) in this form. The disadvantage is that normal practice is to store
- * linear, not (gamma) encoded, values and this requires 16 bit channels for
- * still images rather than the 8 bit channels that are just about sufficient if
+ * linear, not (gamma) encoded, values and this requires 16-bit channels for
+ * still images rather than the 8-bit channels that are just about sufficient if
* gamma encoding is used. In addition all non-transparent pixel values,
* including completely opaque ones, must be gamma encoded to produce the final
- * image. This is the 'STANDARD', 'ASSOCIATED' or 'PREMULTIPLIED' format (the
+ * image. This is the 'STANDARD', 'ASSOCIATED' or 'PREMULTIPLIED' mode (the
* latter being the two common names for associated alpha color channels.)
*
* Since it is not necessary to perform arithmetic on opaque color values so
@@ -1149,10 +1149,10 @@
* the PNG format (adjusted for the output color space) while storing partially
* opaque pixels in the standard, linear, format. The accuracy required for
* standard alpha composition is relatively low, because the pixels are
- * isolated, therefore typically the accuracy loss in storing 8 bit linear
+ * isolated, therefore typically the accuracy loss in storing 8-bit linear
* values is acceptable. (This is not true if the alpha channel is used to
- * simulate transparency over large areas - use 16 bits or the PNG format in
- * this case!) This is the 'OPTIMIZED' format. For this format a pixel is
+ * simulate transparency over large areas - use 16 bits or the PNG mode in
+ * this case!) This is the 'OPTIMIZED' mode. For this mode a pixel is
* treated as opaque only if the alpha value is equal to the maximum value.
*
* The final choice is to gamma encode the alpha channel as well. This is
@@ -1163,7 +1163,7 @@
* opaque areas of the composited PNG image because of arithmetic overflow.
*
* The API function png_set_alpha_mode specifies which of these choices to use
- * with a enumerated 'mode' value and the gamma of the required output:
+ * with an enumerated 'mode' value and the gamma of the required output:
*/
#define PNG_ALPHA_PNG 0 /* according to the PNG standard */
#define PNG_ALPHA_STANDARD 1 /* according to Porter/Duff */
@@ -1277,7 +1277,7 @@
* setting. In this case you just copy completely opaque pixels to the
* output. For pixels that are not completely transparent (you just skip
* those) you do the composition math using png_composite or png_composite_16
- * below then encode the resultant 8 or 16 bit values to match the output
+ * below then encode the resultant 8-bit or 16-bit values to match the output
* encoding.
*
* Other cases
