Add new files

Headers/AppKit/GSSVGImageRep.h

@@ -0,0 +1,47 @@
+/* Definition of class GSSVGImageRep
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   
+   By: heron
+   Date: Fri Nov 15 04:41:51 EST 2019
+
+   This file is part of the GNUstep Library.
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02111 USA.
+*/
+
+#ifndef _GSSVGImageRep_h_GNUSTEP_GUI_INCLUDE
+#define _GSSVGImageRep_h_GNUSTEP_GUI_INCLUDE
+
+#include <AppKit/NSImageRep.h>
+
+#if OS_API_VERSION(MAC_OS_X_VERSION_10_0, GS_API_LATEST)
+
+#if	defined(__cplusplus)
+extern "C" {
+#endif
+
+@interface GSSVGImageRep : NSImageRep
+
+@end
+
+#if	defined(__cplusplus)
+}
+#endif
+
+#endif	/* GS_API_MACOSX */
+
+#endif	/* _GSSVGImageRep_h_GNUSTEP_GUI_INCLUDE */
+

Headers/AppKit/NSCIImageRep.h

@@ -0,0 +1,47 @@
+/* Definition of class NSCIImageRep
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   
+   By: heron
+   Date: Fri Nov 15 04:24:11 EST 2019
+
+   This file is part of the GNUstep Library.
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02111 USA.
+*/
+
+#ifndef _NSCIImageRep_h_GNUSTEP_GUI_INCLUDE
+#define _NSCIImageRep_h_GNUSTEP_GUI_INCLUDE
+
+#include <AppKit/NSImageRep.h>
+
+#if OS_API_VERSION(MAC_OS_X_VERSION_10_0, GS_API_LATEST)
+
+#if	defined(__cplusplus)
+extern "C" {
+#endif
+
+@interface NSCIImageRep : NSImageRep
+
+@end
+
+#if	defined(__cplusplus)
+}
+#endif
+
+#endif	/* GS_API_MACOSX */
+
+#endif	/* _NSCIImageRep_h_GNUSTEP_GUI_INCLUDE */
+

Headers/AppKit/NSDockTile.h

@@ -0,0 +1,47 @@
+/* Definition of class NSDockTile
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   
+   By: heron
+   Date: Sat Nov 16 21:11:06 EST 2019
+
+   This file is part of the GNUstep Library.
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02111 USA.
+*/
+
+#ifndef _NSDockTile_h_GNUSTEP_GUI_INCLUDE
+#define _NSDockTile_h_GNUSTEP_GUI_INCLUDE
+
+#include <AppKit/NSObject.h>
+
+#if OS_API_VERSION(MAC_OS_X_VERSION_10_0, GS_API_LATEST)
+
+#if	defined(__cplusplus)
+extern "C" {
+#endif
+
+@interface NSDockTile : NSObject
+
+@end
+
+#if	defined(__cplusplus)
+}
+#endif
+
+#endif	/* GS_API_MACOSX */
+
+#endif	/* _NSDockTile_h_GNUSTEP_GUI_INCLUDE */
+

Headers/AppKit/NSPDFImageRep.h

@@ -0,0 +1,61 @@
+/* Definition of class NSPDFImageRep
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   
+   By: heron
+   Date: Fri Nov 15 04:24:27 EST 2019
+
+   This file is part of the GNUstep Library.
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02111 USA.
+*/
+
+#ifndef _NSPDFImageRep_h_GNUSTEP_GUI_INCLUDE
+#define _NSPDFImageRep_h_GNUSTEP_GUI_INCLUDE
+
+#include <AppKit/NSImageRep.h>
+
+#if OS_API_VERSION(MAC_OS_X_VERSION_10_0, GS_API_LATEST)
+
+#if	defined(__cplusplus)
+extern "C" {
+#endif
+
+@interface NSPDFImageRep : NSImageRep
+
++ (instancetype) imageRepWithData: (NSData *)imageData;
+
+- (instancetype) initWithData: (NSData *)imageData;
+
+- (NSRect) bounds;
+- (void) setBounds: (NSRect)bounds;
+
+- (NSInteger) currentPage;
+- (void) setCurrentPage: (NSInteger)currentPage;
+
+- (NSInteger) pageCount;
+
+- (NSData *) PDFRepresentation;
+
+@end
+
+#if	defined(__cplusplus)
+}
+#endif
+
+#endif	/* GS_API_MACOSX */
+
+#endif	/* _NSPDFImageRep_h_GNUSTEP_GUI_INCLUDE */
+

Headers/AppKit/NSPDFInfo.h

@@ -0,0 +1,47 @@
+/* Definition of class NSPDFInfo
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   
+   By: heron
+   Date: Sat Nov 16 21:20:46 EST 2019
+
+   This file is part of the GNUstep Library.
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02111 USA.
+*/
+
+#ifndef _NSPDFInfo_h_GNUSTEP_GUI_INCLUDE
+#define _NSPDFInfo_h_GNUSTEP_GUI_INCLUDE
+
+#include <AppKit/NSObject.h>
+
+#if OS_API_VERSION(MAC_OS_X_VERSION_10_0, GS_API_LATEST)
+
+#if	defined(__cplusplus)
+extern "C" {
+#endif
+
+@interface NSPDFInfo : NSObject
+
+@end
+
+#if	defined(__cplusplus)
+}
+#endif
+
+#endif	/* GS_API_MACOSX */
+
+#endif	/* _NSPDFInfo_h_GNUSTEP_GUI_INCLUDE */
+

Headers/AppKit/NSPDFPanel.h

@@ -0,0 +1,47 @@
+/* Definition of class NSPDFPanel
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   
+   By: heron
+   Date: Sat Nov 16 21:21:00 EST 2019
+
+   This file is part of the GNUstep Library.
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02111 USA.
+*/
+
+#ifndef _NSPDFPanel_h_GNUSTEP_GUI_INCLUDE
+#define _NSPDFPanel_h_GNUSTEP_GUI_INCLUDE
+
+#include <AppKit/NSPanel.h>
+
+#if OS_API_VERSION(MAC_OS_X_VERSION_10_0, GS_API_LATEST)
+
+#if	defined(__cplusplus)
+extern "C" {
+#endif
+
+@interface NSPDFPanel : NSPanel
+
+@end
+
+#if	defined(__cplusplus)
+}
+#endif
+
+#endif	/* GS_API_MACOSX */
+
+#endif	/* _NSPDFPanel_h_GNUSTEP_GUI_INCLUDE */
+

Headers/AppKit/NSPICTImageRep.h

@@ -0,0 +1,47 @@
+/* Definition of class NSPICTImageRep
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   
+   By: heron
+   Date: Fri Nov 15 04:24:51 EST 2019
+
+   This file is part of the GNUstep Library.
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02111 USA.
+*/
+
+#ifndef _NSPICTImageRep_h_GNUSTEP_GUI_INCLUDE
+#define _NSPICTImageRep_h_GNUSTEP_GUI_INCLUDE
+
+#include <AppKit/NSImageRep.h>
+
+#if OS_API_VERSION(MAC_OS_X_VERSION_10_0, GS_API_LATEST)
+
+#if	defined(__cplusplus)
+extern "C" {
+#endif
+
+@interface NSPICTImageRep : NSImageRep
+
+@end
+
+#if	defined(__cplusplus)
+}
+#endif
+
+#endif	/* GS_API_MACOSX */
+
+#endif	/* _NSPICTImageRep_h_GNUSTEP_GUI_INCLUDE */
+

MISSING

@@ -50,10 +50,6 @@ MISSING HEADERS
 > NSNibControlConnector.h
 > NSNibOutletConnector.h
 > NSOpenGLLayer.h
-> NSPDFImageRep.h
-> NSPDFInfo.h
-> NSPDFPanel.h
-> NSPICTImageRep.h
 > NSPageController.h
 > NSPanGestureRecognizer.h
 > NSPathCell.h
@@ -107,4 +103,12 @@ MISSING HEADERS
 > NSWindowRestoration.h
 > NSWindowScripting.h
 > NSWindowTab.h
-> NSWindowTabGroup.h
+> NSWindowTabGroup.h
+
+Completed
+
+> NSPDFImageRep.h
+> NSPDFInfo.h
+> NSPDFPanel.h
+> NSPICTImageRep.h
+

Source/GSSVGImageRep.m

@@ -0,0 +1,30 @@
+/* Implementation of class GSSVGImageRep
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   
+   By: heron
+   Date: Fri Nov 15 04:41:51 EST 2019
+
+   This file is part of the GNUstep Library.
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02111 USA.
+*/
+
+#include <AppKit/GSSVGImageRep.h>
+
+@implementation GSSVGImageRep
+
+@end
+

Source/NSBitmapImageRep+BMP.m

@@ -0,0 +1,444 @@
+/*
+   NSBitmapImageRep+PNG.m
+
+   Methods for loading .png images.
+
+   Copyright (C) 2003-2013 Free Software Foundation, Inc.
+   
+   Written by: Alexander Malmberg <alexander@malmberg.org>
+   Date: 2003-12-07
+   
+   This file is part of the GNUstep GUI Library.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; see the file COPYING.LIB.
+   If not, see <http://www.gnu.org/licenses/> or write to the 
+   Free Software Foundation, 51 Franklin Street, Fifth Floor, 
+   Boston, MA 02110-1301, USA.
+*/
+
+#import "config.h"
+
+/* we include PNG stuff only if required and before the resto to avoid header and
+   redeclaration problems (setjmp, etc) */
+#ifdef HAVE_LIBPNG
+
+#include <png.h>
+
+#if defined(PNG_FLOATING_POINT_SUPPORT)
+#  define PNG_FLOATING_POINT 1
+#else
+#  define PNG_FLOATING_POINT 0
+#endif
+#if defined(PNG_gAMA_SUPPORT)
+#  define PNG_gAMA 1
+#else
+#  define PNG_gAMA 0
+#endif
+
+#endif /* HAVE_LIBPNG */
+
+/* we import all the standard headers to allow compilation without PNG */
+#import <Foundation/NSData.h>
+#import <Foundation/NSDictionary.h>
+#import <Foundation/NSException.h>
+#import <Foundation/NSString.h>
+#import <Foundation/NSValue.h>
+#import "AppKit/NSGraphics.h"
+#import "NSBitmapImageRepPrivate.h"
+#import "NSBitmapImageRep+PNG.h"
+
+
+#ifdef HAVE_LIBPNG
+
+@implementation NSBitmapImageRep (PNG)
+
++ (BOOL) _bitmapIsPNG: (NSData *)imageData
+{
+  if (![imageData length])
+    return NO;
+
+  if (!png_sig_cmp((png_bytep)[imageData bytes], 0, [imageData length]))
+    return YES;
+  return NO;
+}
+
+typedef struct
+{
+  NSData *data;
+  unsigned int offset;
+} reader_struct_t;
+
+static void reader_func(png_structp png_struct, png_bytep data,
+			png_size_t length)
+{
+  reader_struct_t *r = png_get_io_ptr(png_struct);
+
+  if (r->offset + length > [r->data length])
+    {
+      png_error(png_struct, "end of buffer");
+      return;
+    }
+  memcpy(data, [r->data bytes] + r->offset, length);
+  r->offset += length;
+}
+
+- (id) _initBitmapFromPNG: (NSData *)imageData
+{
+  png_structp png_struct;
+  png_infop png_info, png_end_info;
+
+  int width,height;
+  unsigned char *buf = NULL;
+  int bytes_per_row;
+  int type,channels,depth;
+
+  BOOL alpha;
+  int bpp;
+  NSString *colorspace;
+
+  reader_struct_t reader;
+
+  if (!(self = [super init]))
+    return nil;
+
+  png_struct = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+  if (!png_struct)
+    {
+      RELEASE(self);
+      return nil;
+    }
+
+  png_info = png_create_info_struct(png_struct);
+  if (!png_info)
+    {
+      png_destroy_read_struct(&png_struct, NULL, NULL);
+      RELEASE(self);
+      return nil;
+    }
+
+  png_end_info = png_create_info_struct(png_struct);
+  if (!png_end_info)
+    {
+      png_destroy_read_struct(&png_struct, &png_info, NULL);
+      RELEASE(self);
+      return nil;
+    }
+
+  if (setjmp(png_jmpbuf(png_struct)))
+    {
+      // We get here when an error happens during image loading
+      png_destroy_read_struct(&png_struct, &png_info, &png_end_info);
+      if (buf != NULL)
+        {
+          NSZoneFree([self zone], buf);
+        }
+      RELEASE(self);
+      return nil;
+    }
+
+  reader.data = imageData;
+  reader.offset = 0;
+  png_set_read_fn(png_struct, &reader, reader_func);
+
+  png_read_info(png_struct, png_info);
+
+  width = png_get_image_width(png_struct, png_info);
+  height = png_get_image_height(png_struct, png_info);
+  bytes_per_row = png_get_rowbytes(png_struct, png_info);
+  type = png_get_color_type(png_struct, png_info);
+  channels = png_get_channels(png_struct, png_info);
+  depth = png_get_bit_depth(png_struct, png_info);
+
+  switch (type)
+    {
+      case PNG_COLOR_TYPE_GRAY:
+	colorspace = NSCalibratedWhiteColorSpace;
+	alpha = NO;
+	NSAssert(channels == 1, @"unexpected channel/color_type combination");
+	bpp = depth;
+	break;
+
+      case PNG_COLOR_TYPE_GRAY_ALPHA:
+	colorspace = NSCalibratedWhiteColorSpace;
+	alpha = YES;
+	NSAssert(channels == 2, @"unexpected channel/color_type combination");
+	bpp = depth * 2;
+	break;
+
+      case PNG_COLOR_TYPE_PALETTE:
+	png_set_palette_to_rgb(png_struct);
+	channels = 3;
+	depth = 8;
+
+	alpha = NO;
+	if (png_get_valid(png_struct, png_info, PNG_INFO_tRNS))
+	  {
+	    alpha = YES;
+	    channels++;
+	    png_set_tRNS_to_alpha(png_struct);
+	  }
+
+	bpp = channels * 8;
+	bytes_per_row = channels * width;
+	colorspace = NSCalibratedRGBColorSpace;
+	break;
+
+      case PNG_COLOR_TYPE_RGB:
+	colorspace = NSCalibratedRGBColorSpace;
+	alpha = NO;
+	bpp = channels * depth; /* channels might be 4 if there's a filler */
+	channels = 3;
+	break;
+
+      case PNG_COLOR_TYPE_RGB_ALPHA:
+	colorspace = NSCalibratedRGBColorSpace;
+	alpha = YES;
+	NSAssert(channels == 4, @"unexpected channel/color_type combination");
+	bpp = 4 * depth;
+	break;
+
+      default:
+	NSLog(@"NSBitmapImageRep+PNG: unknown color type %i", type);
+	RELEASE(self);
+	return nil;
+    }
+
+  buf = NSZoneMalloc([self zone], bytes_per_row * height);
+
+  {
+    png_bytep row_pointers[height];
+    int i;
+
+    for (i = 0; i < height; i++)
+      {
+        row_pointers[i] = buf + i * bytes_per_row;
+      }
+
+    png_read_image(png_struct, row_pointers);
+  }
+
+  self = [self initWithBitmapDataPlanes: &buf
+                             pixelsWide: width
+                             pixelsHigh: height
+                          bitsPerSample: depth
+                        samplesPerPixel: channels
+                               hasAlpha: alpha
+                               isPlanar: NO
+                         colorSpaceName: colorspace
+                           bitmapFormat: NSAlphaNonpremultipliedBitmapFormat
+                            bytesPerRow: bytes_per_row
+                           bitsPerPixel: bpp];
+  
+  _imageData = [[NSData alloc]
+    initWithBytesNoCopy: buf
+		 length: bytes_per_row * height];
+
+  if (png_get_valid(png_struct, png_info, PNG_INFO_gAMA))
+  {
+    double file_gamma = 2.2;
+    if (PNG_FLOATING_POINT)
+    {
+      png_get_gAMA(png_struct, png_info, &file_gamma);
+      // remap file_gamma [1.0, 2.5] to property [0.0, 1.0]
+      file_gamma = (file_gamma - 1.0)/1.5;
+    }
+    else	// fixed point
+    {
+      png_fixed_point int_gamma = 220000;
+      png_get_gAMA_fixed(png_struct, png_info, &int_gamma);
+      // remap gamma [0.0, 1.0] to [100000, 250000]
+      file_gamma = ((double)int_gamma - 100000.0)/150000.0;
+    }
+    [self setProperty: NSImageGamma
+            withValue: [NSNumber numberWithDouble: file_gamma]];
+    //NSLog(@"PNG file gamma: %f", file_gamma);
+   } 
+
+  if (png_get_valid(png_struct, png_info, PNG_INFO_pHYs))
+  {
+    png_uint_32 xppm = png_get_x_pixels_per_meter(png_struct, png_info);
+    png_uint_32 yppm = png_get_y_pixels_per_meter(png_struct, png_info);
+
+    if (xppm != 0 && yppm != 0)
+      {
+	const CGFloat pointsPerMeter = 39.3700787 * 72.0;
+	NSSize sizeInPoints = NSMakeSize((width / (CGFloat)xppm) * pointsPerMeter,
+					 (height / (CGFloat)yppm) * pointsPerMeter);
+
+	// HACK: PNG can not represent 72DPI exactly. If the ppm value is near 72DPI,
+	// assume it is exactly 72 DPI. Note that the same problem occurrs at 144DPI...
+	// so don't use PNG for resolution independent graphics.
+	if (xppm  == 2834 || xppm == 2835)
+	  {
+	    sizeInPoints.width = width;
+	  }
+	if (yppm == 2834 || yppm == 2835)
+	  {
+	    sizeInPoints.height = height;
+	  }
+
+	[self setSize: sizeInPoints];
+      }
+  }
+
+  png_destroy_read_struct(&png_struct, &png_info, &png_end_info);
+
+  return self;
+}
+
+/***** PNG writing support ******/
+static void writer_func(png_structp png_struct, png_bytep data,
+			png_size_t length)
+{
+  NSMutableData * PNGRep = png_get_io_ptr(png_struct);
+  [PNGRep appendBytes: data length: length];
+}
+
+- (NSData *) _PNGRepresentationWithProperties: (NSDictionary *) properties
+{
+  png_structp png_struct;
+  png_infop png_info;
+
+  int width, height, depth;
+  unsigned char * bitmapData;
+  int bytes_per_row;
+  NSString * colorspace;
+  NSMutableData * PNGRep = nil;
+  int type = -1;	// illegal value
+  int interlace = PNG_INTERLACE_NONE;
+  int transforms = PNG_TRANSFORM_IDENTITY;	// no transformations
+  NSNumber * gammaNumber = nil;
+  double gamma = 0.0;
+  
+  // Need to convert to non-pre-multiplied format
+  if ([self isPlanar] || !(_format & NSAlphaNonpremultipliedBitmapFormat))
+  {
+    NSBitmapImageRep *converted = [self _convertToFormatBitsPerSample: _bitsPerSample
+                                                      samplesPerPixel: _numColors
+                                                             hasAlpha: _hasAlpha
+                                                             isPlanar: NO
+                                                       colorSpaceName: _colorSpace
+                                                         bitmapFormat: _format | NSAlphaNonpremultipliedBitmapFormat 
+                                                          bytesPerRow: _bytesPerRow
+                                                         bitsPerPixel: _bitsPerPixel];
+
+    return [converted _PNGRepresentationWithProperties: properties];
+  } 
+  // get the image parameters
+  width = [self pixelsWide];
+  height = [self pixelsHigh];
+  bytes_per_row = [self bytesPerRow];
+  colorspace = [self colorSpaceName];
+  depth = [self bitsPerSample];
+  gammaNumber = [properties objectForKey: NSImageGamma];
+  gamma = [gammaNumber doubleValue];
+  if ([[properties objectForKey: NSImageInterlaced] boolValue])
+    interlace = PNG_INTERLACE_ADAM7;
+
+  if ([colorspace isEqualToString: NSCalibratedWhiteColorSpace] ||
+      [colorspace isEqualToString: NSDeviceWhiteColorSpace])
+    type = PNG_COLOR_TYPE_GRAY;
+  if ([colorspace isEqualToString: NSCalibratedRGBColorSpace] ||
+      [colorspace isEqualToString: NSDeviceRGBColorSpace])
+    type = PNG_COLOR_TYPE_RGB;
+  if ([self hasAlpha]) type = type | PNG_COLOR_MASK_ALPHA;
+
+  // make the PNG structures
+  // ignore errors until I write the handlers
+  png_struct = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+  if (!png_struct)
+    {
+      return nil;
+    }
+
+  png_info = png_create_info_struct(png_struct);
+  if (!png_info)
+    {
+      png_destroy_write_struct(&png_struct, NULL);
+      return nil;
+    }
+
+  if (setjmp(png_jmpbuf(png_struct)))
+    {
+      png_destroy_write_struct(&png_struct, &png_info);
+      return nil;
+    }
+
+  // init structures
+  PNGRep = [NSMutableData dataWithLength: 0];
+#if PNG_LIBPNG_VER < 10500
+  // I don't think this was ever needed as png_create_info_struct()
+  // sets up the structure correctly and we rely on that in all other places.
+  png_info_init_3(&png_info, png_sizeof(png_info));
+#endif
+  png_set_write_fn(png_struct, PNGRep, writer_func, NULL);
+  png_set_IHDR(png_struct, png_info, width, height, depth,
+   type, interlace, PNG_COMPRESSION_TYPE_BASE,
+   PNG_FILTER_TYPE_BASE);
+
+  if (gammaNumber)
+  {
+    NSLog(@"PNGRepresentation: gamma support is experimental");
+    if (PNG_FLOATING_POINT)
+    {
+      // remap gamma [0.0, 1.0] to [1.0, 2.5]
+      png_set_gAMA(png_struct, png_info, (gamma * 1.5 + 1.0));
+    }
+    else	// fixed point
+    {
+      // remap gamma [0.0, 1.0] to [100000, 250000]
+      int int_gamma = (int)(gamma * 150000.0 + 100000.0);
+      png_set_gAMA_fixed(png_struct, png_info, int_gamma);
+    }
+   } 
+
+  // get rgb data and row pointers and
+  // write PNG out to NSMutableData
+  bitmapData = [self bitmapData];
+  {
+    unsigned char *row_pointers[height];
+    int i;
+    for (i = 0 ; i < height ; i++)
+      row_pointers[i] = bitmapData + i * bytes_per_row;
+    png_set_rows(png_struct, png_info, row_pointers);
+
+    png_write_png(png_struct, png_info, transforms, NULL);
+  }
+               
+  //NSLog(@"PNG representation is experimental: %i bytes written", [PNGRep length]);
+  png_destroy_write_struct(&png_struct, &png_info);
+  return PNGRep;
+}
+@end
+
+#else /* !HAVE_LIBPNG */
+
+@implementation NSBitmapImageRep (PNG)
++ (BOOL) _bitmapIsPNG: (NSData *)imageData
+{
+  return NO;
+}
+- (id) _initBitmapFromPNG: (NSData *)imageData
+{
+  RELEASE(self);
+  return nil;
+}
+- (NSData *) _PNGRepresentationWithProperties: (NSDictionary *) properties
+{
+  return nil;
+}
+@end
+
+#endif /* !HAVE_LIBPNG */
+

Source/NSCIImageRep.m

@@ -0,0 +1,30 @@
+/* Implementation of class NSCIImageRep
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   
+   By: heron
+   Date: Fri Nov 15 04:24:11 EST 2019
+
+   This file is part of the GNUstep Library.
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02111 USA.
+*/
+
+#include <AppKit/NSCIImageRep.h>
+
+@implementation NSCIImageRep
+
+@end
+

Source/NSDockTile.m

@@ -0,0 +1,30 @@
+/* Implementation of class NSDockTile
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   
+   By: heron
+   Date: Sat Nov 16 21:11:06 EST 2019
+
+   This file is part of the GNUstep Library.
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02111 USA.
+*/
+
+#include <AppKit/NSDockTile.h>
+
+@implementation NSDockTile
+
+@end
+

Source/NSPDFImageRep.m

@@ -0,0 +1,64 @@
+/* Implementation of class NSPDFImageRep
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   
+   By: heron
+   Date: Fri Nov 15 04:24:27 EST 2019
+
+   This file is part of the GNUstep Library.
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02111 USA.
+*/
+
+#include <AppKit/NSPDFImageRep.h>
+
+@implementation NSPDFImageRep
++ (instancetype) imageRepWithData: (NSData *)imageData
+{
+}
+
+- (instancetype) initWithData: (NSData *)imageData
+{
+}
+
+- (NSRect) bounds
+{
+}
+
+- (void) setBounds: (NSRect)bounds
+{
+}
+
+- (NSInteger) currentPage
+{
+  return 0;
+}
+
+- (void) setCurrentPage: (NSInteger)currentPage
+{
+}
+
+- (NSInteger) pageCount
+{
+  return 0;
+}
+
+- (NSData *) PDFRepresentation
+{
+  return nil;
+}
+
+@end
+

Source/NSPDFInfo.m

@@ -0,0 +1,30 @@
+/* Implementation of class NSPDFInfo
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   
+   By: heron
+   Date: Sat Nov 16 21:20:46 EST 2019
+
+   This file is part of the GNUstep Library.
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02111 USA.
+*/
+
+#include <AppKit/NSPDFInfo.h>
+
+@implementation NSPDFInfo
+
+@end
+

Source/NSPDFPanel.m

@@ -0,0 +1,30 @@
+/* Implementation of class NSPDFPanel
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   
+   By: heron
+   Date: Sat Nov 16 21:21:00 EST 2019
+
+   This file is part of the GNUstep Library.
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02111 USA.
+*/
+
+#include <AppKit/NSPDFPanel.h>
+
+@implementation NSPDFPanel
+
+@end
+

Source/NSPICTImageRep.m

@@ -0,0 +1,30 @@
+/* Implementation of class NSPICTImageRep
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   
+   By: heron
+   Date: Fri Nov 15 04:24:51 EST 2019
+
+   This file is part of the GNUstep Library.
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02111 USA.
+*/
+
+#include <AppKit/NSPICTImageRep.h>
+
+@implementation NSPICTImageRep
+
+@end
+