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Swept the freeglut_font.c for comment cleanup:

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* Got rid of the "rewrite C as English" comments.
 * Corrected several bogus references to "carriage returns" (in strings).
   The symbols were newlines or EOLs or LFs (\n).
   They were *not* carriage returns or CRs (\r).
 * Clarified the comments on glBitmap() calls.


git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@232 7f0cb862-5218-0410-a997-914c9d46530a
This commit is contained in:
rkrolib 2003-10-14 00:51:00 +00:00
parent fd81891b21
commit ba4ef53738
1 changed files with 28 additions and 151 deletions
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179
freeglut/freeglut/src/freeglut_font.c
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@ -64,9 +64,6 @@ extern SFG_StrokeFont fgStrokeMonoRoman;
*/
static SFG_Font* fghFontByID( void* font )
{
/*
* Try matching the font ID and the font data structure
*/
if( font == GLUT_BITMAP_8_BY_13 ) return( &fgFontFixed8x13 );
if( font == GLUT_BITMAP_9_BY_15 ) return( &fgFontFixed9x15 );
if( font == GLUT_BITMAP_HELVETICA_10 ) return( &fgFontHelvetica10 );
@ -74,13 +71,8 @@ static SFG_Font* fghFontByID( void* font )
if( font == GLUT_BITMAP_HELVETICA_18 ) return( &fgFontHelvetica18 );
if( font == GLUT_BITMAP_TIMES_ROMAN_10 ) return( &fgFontTimesRoman10 );
if( font == GLUT_BITMAP_TIMES_ROMAN_24 ) return( &fgFontTimesRoman24 );
/*
* This probably is the library user's fault
*/
fgError( "font 0x%08x not found", font );
return 0;
return 0; /*** XXX NOT REACHED ***/
}
/*
@ -89,18 +81,10 @@ static SFG_Font* fghFontByID( void* font )
*/
static SFG_StrokeFont* fghStrokeByID( void* font )
{
/*
* Try matching the font ID and the font data structure
*/
if( font == GLUT_STROKE_ROMAN ) return( &fgStrokeRoman );
if( font == GLUT_STROKE_MONO_ROMAN ) return( &fgStrokeMonoRoman );
/*
* This probably is the library user's fault
*/
fgError( "stroke font 0x%08x not found", font );
return 0;
return 0; /*** XXX NOT REACHED ***/
}
@ -112,50 +96,28 @@ static SFG_StrokeFont* fghStrokeByID( void* font )
void FGAPIENTRY glutBitmapCharacter( void* fontID, int character )
{
const GLubyte* face;
/*
* First of all we'll need a font to use
*/
SFG_Font* font = fghFontByID( fontID );
/*
* Make sure the character we want to output is valid
*/
freeglut_return_if_fail( character >= 1 && character < 256 );
/*
* Then find the character we want to draw
* Find the character we want to draw (???)
*/
face = font->Characters[ character - 1 ];
/*
* Save the old pixel store settings
*/
glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT );
/*
* Set up the pixel unpacking ways
*/
glPixelStorei( GL_UNPACK_SWAP_BYTES, GL_FALSE );
glPixelStorei( GL_UNPACK_LSB_FIRST, GL_FALSE );
glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
glPixelStorei( GL_UNPACK_SKIP_ROWS, 0 );
glPixelStorei( GL_UNPACK_SKIP_PIXELS, 0 );
glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
/*
* We'll use a glBitmap call to draw the font.
*/
glBitmap(
face[ 0 ], font->Height, /* The bitmap's width and height */
font->xorig, font->yorig, /* The origin -- what on earth? */
(float)(face[ 0 ]), 0.0, /* The raster advance -- inc. x */
(face + 1) /* The packed bitmap data... */
face[ 0 ], font->Height, /* The bitmap's width and height */
font->xorig, font->yorig, /* The origin in the font glyph */
(float)(face[ 0 ]), 0.0, /* The raster advance -- inc. x,y */
(face + 1) /* The packed bitmap data... */
);
/*
* Restore the old pixel store settings
*/
glPopClientAttrib();
}
@ -163,23 +125,11 @@ void FGAPIENTRY glutBitmapString( void* fontID, const unsigned char *string )
{
int c;
int numchar = strlen ( string ) ;
/*
* First of all we'll need a font to use
*/
SFG_Font* font = fghFontByID( fontID );
float raster_position[4] ;
glGetFloatv ( GL_CURRENT_RASTER_POSITION, raster_position ) ;
/*
* Save the old pixel store settings
*/
glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT );
/*
* Set up the pixel unpacking ways
*/
glPixelStorei( GL_UNPACK_SWAP_BYTES, GL_FALSE );
glPixelStorei( GL_UNPACK_LSB_FIRST, GL_FALSE );
glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
@ -189,8 +139,8 @@ void FGAPIENTRY glutBitmapString( void* fontID, const unsigned char *string )
/*
* Step through the string, drawing each character.
* A carriage return will simply translate the next character's insertion point back to the
* start of the line and down one line.
* A carriage return will simply translate the next character's insertion
* point back to the start of the line and down one line.
*/
for( c = 0; c < numchar; c++ )
{
@ -199,25 +149,18 @@ void FGAPIENTRY glutBitmapString( void* fontID, const unsigned char *string )
raster_position[1] -= (float)font->Height ;
glRasterPos4fv ( raster_position ) ;
}
else /* Not a carriage return, draw the bitmap character */
else /* Not an EOL, draw the bitmap character */
{
const GLubyte* face = font->Characters[ string[ c ] - 1 ] ;
/*
* We'll use a glBitmap call to draw the font.
*/
glBitmap(
face[ 0 ], font->Height, /* The bitmap's width and height */
font->xorig, font->yorig, /* The origin -- what on earth? */
(float)(face[ 0 ]), 0.0, /* The raster advance -- inc. x */
(face + 1) /* The packed bitmap data... */
face[ 0 ], font->Height, /* The bitmap's width and height */
font->xorig, font->yorig, /* The origin in the font glyph */
(float)(face[ 0 ]), 0.0, /* The raster advance -- inc. x,y */
(face + 1) /* The packed bitmap data... */
) ;
}
}
/*
* Restore the old pixel store settings
*/
glPopClientAttrib();
}
@ -226,19 +169,9 @@ void FGAPIENTRY glutBitmapString( void* fontID, const unsigned char *string )
*/
int FGAPIENTRY glutBitmapWidth( void* fontID, int character )
{
/*
* First of all, grab the font we need
*/
SFG_Font* font = fghFontByID( fontID );
/*
* Make sure the character we want to output is valid
*/
freeglut_return_val_if_fail( character > 0 && character < 256, 0 );
/*
* Scan the font looking for the specified character
*/
return( *(font->Characters[ character - 1 ]) );
}
@ -248,32 +181,22 @@ int FGAPIENTRY glutBitmapWidth( void* fontID, int character )
int FGAPIENTRY glutBitmapLength( void* fontID, const unsigned char* string )
{
int c, length = 0, this_line_length = 0;
/*
* First of all, grab the font we need
*/
SFG_Font* font = fghFontByID( fontID );
/*
* Step through the characters in the string, adding up the width of each one
*/
int numchar = strlen ( string ) ;
for( c = 0; c < numchar; c++ )
{
if ( string[ c ] == '\n' ) /* Carriage return, reset the length of this line */
if ( string[ c ] == '\n' ) /* EOL; reset the length of this line */
{
if ( length < this_line_length ) length = this_line_length ;
this_line_length = 0 ;
}
else /* Not a carriage return, increment the length of this line */
else /* Not an EOL, increment the length of this line */
this_line_length += *(font->Characters[ string[ c ] - 1 ]) ;
}
if ( length < this_line_length )
length = this_line_length ;
if ( length < this_line_length ) length = this_line_length ;
/*
* Return the result now
*/
return( length );
}
@ -282,14 +205,7 @@ int FGAPIENTRY glutBitmapLength( void* fontID, const unsigned char* string )
*/
int FGAPIENTRY glutBitmapHeight( void* fontID )
{
/*
* See which font are we queried about
*/
SFG_Font* font = fghFontByID( fontID );
/*
* Return the character set's height
*/
return( font->Height );
}
@ -301,21 +217,12 @@ void FGAPIENTRY glutStrokeCharacter( void* fontID, int character )
const SFG_StrokeChar *schar;
const SFG_StrokeStrip *strip;
int i, j;
/*
* First of all we'll need a font to use
*/
SFG_StrokeFont* font = fghStrokeByID( fontID );
/*
* Make sure the character we want to output is valid
*/
freeglut_return_if_fail( character >= 0 && character < font->Quantity );
schar = font->Characters[character];
freeglut_return_if_fail( schar );
strip = schar->Strips;
for (i = 0; i < schar->Number; i++, strip++)
@ -335,16 +242,12 @@ void FGAPIENTRY glutStrokeString( void* fontID, const unsigned char *string )
int c, i, j;
int numchar = strlen ( string ) ;
float length = 0.0 ;
/*
* First of all we'll need a font to use
*/
SFG_StrokeFont* font = fghStrokeByID( fontID );
/*
* Step through the string, drawing each character.
* A carriage return will simply translate the next character's insertion point back to the
* start of the line and down one line.
* A carriage return will simply translate the next character's insertion
* point back to the start of the line and down one line.
*/
for( c = 0; c < numchar; c++ )
{
@ -355,7 +258,7 @@ void FGAPIENTRY glutStrokeString( void* fontID, const unsigned char *string )
glTranslatef ( -length, -(float)(font->Height), 0.0 ) ;
length = 0.0 ;
}
else /* Not a carriage return, draw the bitmap character */
else /* Not an EOL, draw the bitmap character */
{
const SFG_StrokeChar *schar = font->Characters[string[c]];
if ( schar != NULL )
@ -385,18 +288,10 @@ void FGAPIENTRY glutStrokeString( void* fontID, const unsigned char *string )
int FGAPIENTRY glutStrokeWidth( void* fontID, int character )
{
const SFG_StrokeChar *schar;
/*
* First of all we'll need a font to use
*/
SFG_StrokeFont* font = fghStrokeByID( fontID );
/*
* Make sure the character we want to output is valid
*/
freeglut_return_val_if_fail( character >= 0 && character < font->Quantity, 0 );
schar = font->Characters[character];
freeglut_return_val_if_fail( schar, 0 );
return ((int)(schar->Right + 0.5));
@ -410,26 +305,19 @@ int FGAPIENTRY glutStrokeLength( void* fontID, const unsigned char* string )
int c;
float length = 0.0;
float this_line_length = 0.0 ;
/*
* First of all we'll need a font to use
*/
SFG_StrokeFont* font = fghStrokeByID( fontID );
/*
* Step through the characters in the string, adding up the width of each one
*/
int numchar = strlen ( string ) ;
for( c = 0; c < numchar; c++ )
{
if ( string[ c ] < font->Quantity )
{
if ( string[ c ] == '\n' ) /* Carriage return, reset the length of this line */
if ( string[ c ] == '\n' ) /* EOL; reset the length of this line */
{
if ( length < this_line_length ) length = this_line_length ;
this_line_length = 0.0 ;
}
else /* Not a carriage return, increment the length of this line */
else /* Not an EOL, increment the length of this line */
{
const SFG_StrokeChar *schar = font->Characters[string[c]];
if ( schar != NULL )
@ -437,12 +325,8 @@ int FGAPIENTRY glutStrokeLength( void* fontID, const unsigned char* string )
}
}
}
if ( length < this_line_length ) length = this_line_length ;
/*
* Return the result now
*/
if ( length < this_line_length )
length = this_line_length ;
return( (int)(length+0.5) );
}
@ -451,14 +335,7 @@ int FGAPIENTRY glutStrokeLength( void* fontID, const unsigned char* string )
*/
GLfloat FGAPIENTRY glutStrokeHeight( void* fontID )
{
/*
* See which font are we queried about
*/
SFG_StrokeFont* font = fghStrokeByID( fontID );
/*
* Return the character set's height
*/
return( font->Height );
}