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/*
* This program is Copyright © 2002 Bryan L Blackburn. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the names Bryan L Blackburn, Withay.com, nor the names of any
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY BRYAN L BLACKBURN ``AS IS'' AND ANY EXPRESSED OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Initial version, 27 October, 2002
*/
/* NSFont_OpenGL.m */
#import "NSFont_OpenGL.h"
@interface NSFont (withay_OpenGL_InternalMethods)
- (BOOL) makeDisplayList:(GLint)listNum withImage:(NSImage *)theImage;
+ (void) doOpenGLLog:(NSString *)format, ...;
@end
@implementation NSFont (withay_OpenGL)
static BOOL openGLLoggingEnabled = YES;
/*
* Enable/disable logging, class-wide, not object-wide
*/
+ (void) setOpenGLLogging:(BOOL)logEnabled
{
openGLLoggingEnabled = logEnabled;
}
/*
* Create the set of display lists for the bitmaps
*/
- (BOOL) makeGLDisplayListFirst:(unichar)first count:(int)count base:(GLint)base
{
GLint curListIndex;
NSColor *blackColor;
NSDictionary *attribDict;
GLint dListNum;
NSString *currentChar;
unichar currentUnichar;
NSSize charSize;
NSRect charRect;
NSImage *theImage;
BOOL retval;
// Make sure a list isn't already under construction
glGetIntegerv( GL_LIST_INDEX, &curListIndex );
if( curListIndex != 0 )
{
[ NSFont doOpenGLLog:@"Display list already under construction" ];
return FALSE;
}
// Save pixel unpacking state
glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT );
glPixelStorei( GL_UNPACK_SWAP_BYTES, GL_FALSE );
glPixelStorei( GL_UNPACK_LSB_FIRST, GL_FALSE );
glPixelStorei( GL_UNPACK_SKIP_ROWS, 0 );
glPixelStorei( GL_UNPACK_SKIP_PIXELS, 0 );
glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
blackColor = [ NSColor blackColor ];
attribDict = [ NSDictionary dictionaryWithObjectsAndKeys:
self, NSFontAttributeName,
[ NSColor whiteColor ],
NSForegroundColorAttributeName,
blackColor, NSBackgroundColorAttributeName,
nil ];
charRect.origin.x = charRect.origin.y = 0;
theImage = [ [ [ NSImage alloc ] initWithSize:NSMakeSize( 0, 0 ) ]
autorelease ];
retval = TRUE;
for( dListNum = base, currentUnichar = first; currentUnichar < first + count;
dListNum++, currentUnichar++ )
{
currentChar = [ NSString stringWithCharacters:¤tUnichar length:1 ];
charSize = [ currentChar sizeWithAttributes:attribDict ];
charRect.size = charSize;
charRect = NSIntegralRect( charRect );
if( charRect.size.width > 0 && charRect.size.height > 0 )
{
[ theImage setSize:charRect.size ];
[ theImage lockFocus ];
[ [ NSGraphicsContext currentContext ] setShouldAntialias:NO ];
[ blackColor set ];
[ NSBezierPath fillRect:charRect ];
[ currentChar drawInRect:charRect withAttributes:attribDict ];
[ theImage unlockFocus ];
if( ![ self makeDisplayList:dListNum withImage:theImage ] )
{
retval = FALSE;
break;
}
}
}
glPopClientAttrib();
return retval;
}
/*
* Create one display list based on the given image. This assumes the image
* uses 8-bit chunks to represent a sample
*/
- (BOOL) makeDisplayList:(GLint)listNum withImage:(NSImage *)theImage
{
NSBitmapImageRep *bitmap;
int bytesPerRow, pixelsHigh, pixelsWide, samplesPerPixel;
unsigned char *bitmapBytes;
int currentBit, byteValue;
unsigned char *newBuffer, *movingBuffer;
int rowIndex, colIndex;
bitmap = [ NSBitmapImageRep imageRepWithData:[ theImage
TIFFRepresentationUsingCompression:NSTIFFCompressionNone
factor:0 ] ];
pixelsHigh = [ bitmap pixelsHigh ];
pixelsWide = [ bitmap pixelsWide ];
bitmapBytes = [ bitmap bitmapData ];
bytesPerRow = [ bitmap bytesPerRow ];
samplesPerPixel = [ bitmap samplesPerPixel ];
newBuffer = calloc( ceil( (float) bytesPerRow / 8.0 ), pixelsHigh );
if( newBuffer == NULL )
{
[ NSFont doOpenGLLog:@"Failed to calloc() memory in "
@"makeDisplayList:withImage:" ];
return FALSE;
}
movingBuffer = newBuffer;
/*
* Convert the color bitmap into a true bitmap, ie, one bit per pixel. We
* read at last row, write to first row as Cocoa and OpenGL have opposite
* y origins
*/
for( rowIndex = pixelsHigh - 1; rowIndex >= 0; rowIndex-- )
{
currentBit = 0x80;
byteValue = 0;
for( colIndex = 0; colIndex < pixelsWide; colIndex++ )
{
if( bitmapBytes[ rowIndex * bytesPerRow + colIndex * samplesPerPixel ] )
byteValue |= currentBit;
currentBit >>= 1;
if( currentBit == 0 )
{
*movingBuffer++ = byteValue;
currentBit = 0x80;
byteValue = 0;
}
}
/*
* Fill out the last byte; extra is ignored by OpenGL, but each row
* must start on a new byte
*/
if( currentBit != 0x80 )
*movingBuffer++ = byteValue;
}
glNewList( listNum, GL_COMPILE );
glBitmap( pixelsWide, pixelsHigh, 0, 0, pixelsWide, 0, newBuffer );
glEndList();
free( newBuffer );
return TRUE;
}
/*
* Log the warning/error, if logging is enabled
*/
+ (void) doOpenGLLog:(NSString *)format, ...
{
va_list args;
if( openGLLoggingEnabled )
{
va_start( args, format );
NSLogv( [ NSString stringWithFormat:@"NSFont_OpenGL: %@\n", format ],
args );
va_end( args );
}
}
@end
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