--- a/docs/man3/SDL_SetAlpha.3	Sun Jun 10 18:39:47 2001 +0000
+++ b/docs/man3/SDL_SetAlpha.3	Sun Jun 10 19:31:57 2001 +0000
@@ -1,4 +1,4 @@
-.TH "SDL_SetAlpha" "3" "Mon 12 Mar 2001, 01:04" "SDL" "SDL API Reference" 
+.TH "SDL_SetAlpha" "3" "Sun 10 Jun 2001, 19:42" "SDL" "SDL API Reference" 
 .SH "NAME"
 SDL_SetAlpha\- Adjust the alpha properties of a surface
 .SH "SYNOPSIS"
@@ -14,9 +14,9 @@
 This function and the semantics of SDL alpha blending have changed since version 1\&.1\&.4\&. Up until version 1\&.1\&.5, an alpha value of 0 was considered opaque and a value of 255 was considered transparent\&. This has now been inverted: 0 (\fBSDL_ALPHA_TRANSPARENT\fP) is now considered transparent and 255 (\fBSDL_ALPHA_OPAQUE\fP) is now considered opaque\&.
 .RE
 .PP
-\fBSDL_SetAlpha\fP is used for setting the per-surface alpha and/or enabling and disabling per-pixel alpha blending\&.
+\fBSDL_SetAlpha\fP is used for setting the per-surface alpha value and/or enabling and disabling alpha blending\&.
 .PP
-The \fBsurface\fR parameter specifies which surface whose alpha attributes you wish to adjust\&. \fBflags\fR is used to specify whether alpha blending should be used (\fBSDL_SRCALPHA\fP) and whether the surface should use RLE acceleration for blitting (\fBSDL_RLEACCEL\fP)\&. \fBflags\fR can be an OR\&'d combination of these two options, one of these options or 0\&. If \fBSDL_SRCALPHA\fP is not passed as a flag then all alpha information is ignored when blitting the surface\&. The \fBalpha\fR parameter is the per-surface alpha value, a surface need not have an alpha channel to use per-surface alpha and blitting can still be accelerated with \fBSDL_RLEACCEL\fP\&. Setting the per-surface alpha value to 0 disables per-surface alpha blending\&.
+The\fBsurface\fR parameter specifies which surface whose alpha attributes you wish to adjust\&. \fBflags\fR is used to specify whether alpha blending should be used (\fBSDL_SRCALPHA\fP) and whether the surface should use RLE acceleration for blitting (\fBSDL_RLEACCEL\fP)\&. \fBflags\fR can be an OR\&'d combination of these two options, one of these options or 0\&. If \fBSDL_SRCALPHA\fP is not passed as a flag then all alpha information is ignored when blitting the surface\&. The \fBalpha\fR parameter is the per-surface alpha value; a surface need not have an alpha channel to use per-surface alpha and blitting can still be accelerated with \fBSDL_RLEACCEL\fP\&.
 .PP
 .RS
 \fBNote:  
@@ -33,10 +33,10 @@
 The RGB data is copied from the source\&. The source alpha channel and the per-surface alpha value are ignored\&.
 .TP 20
 RGB->RGBA with \fBSDL_SRCALPHA\fP
-The source is alpha-blended with the destination using the per-surface alpha value\&. If \fBSDL_SRCCOLORKEY\fPliteral> is set, only the pixels not matching the colorkey value are copied\&.
+The source is alpha-blended with the destination using the per-surface alpha value\&. If \fBSDL_SRCCOLORKEY\fP is set, only the pixels not matching the colorkey value are copied\&. The alpha channel of the copied pixels is set to opaque\&.
 .TP 20
 RGB->RGBA without \fBSDL_SRCALPHA\fP
-The RGB data is copied from the source and the destination alpha is zero to opaque\&. If \fBSDL_SRCCOLORKEY\fP is set, only the pixels not matching the colorkey value are copied\&.
+The RGB data is copied from the source and the alpha value of the copied pixels is set to opaque\&. If \fBSDL_SRCCOLORKEY\fP is set, only the pixels not matching the colorkey value are copied\&. 
 .TP 20
 RGBA->RGBA with \fBSDL_SRCALPHA\fP
 The source is alpha-blended with the destination using the source alpha channel\&. The alpha channel in the destination surface is left untouched\&. \fBSDL_SRCCOLORKEY\fP is ignored\&.
@@ -49,7 +49,18 @@
 .TP 20
 RGB->RGB without \fBSDL_SRCALPHA\fP
 The RGB data is copied from the source\&. If \fBSDL_SRCCOLORKEY\fP is set, only the pixels not matching the colorkey value are copied\&.
+.PP
+.RS
+\fBNote:  
+.PP
+ Note that RGBA->RGBA blits (with SDL_SRCALPHA set) keep the alpha of the destination surface\&. This means that you cannot compose two arbitrary RGBA surfaces this way and get the result you would expect from "overlaying" them; the destination alpha will work as a mask\&.
+.PP
+Also note that per-pixel and per-surface alpha cannot be combined; the per-pixel alpha is always used if available
+.RE
+.SH "RETURN VALUE"
+.PP
+This function returns \fB0\fR, or \fB-1\fR if there was an error\&.
 .SH "SEE ALSO"
 .PP
 \fI\fBSDL_MapRGBA\fP\fR, \fI\fBSDL_GetRGBA\fP\fR, \fI\fBSDL_DisplayFormatAlpha\fP\fR, \fI\fBSDL_BlitSurface\fP\fR
-...\" created by instant / docbook-to-man, Mon 12 Mar 2001, 01:04
+...\" created by instant / docbook-to-man, Sun 10 Jun 2001, 19:42