* Source/GSGhostscriptImageRep.m:

* Headers/Additions/GNUstepGUI/GSGhostscriptImageRep.h:
* Source/GNUmakefile:
* Source/NSImageRep.m: New image rep which attempts to
invoke Ghostscript to rasterize PS/EPS/PDF images. It needs
some polishing but basically works.


git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@33389 72102866-910b-0410-8b05-ffd578937521

ChangeLog

@@ -1,3 +1,12 @@
+2011-06-26  Eric Wasylishen  <ewasylishen@gmail.com>
+
+	* Source/GSGhostscriptImageRep.m:
+	* Headers/Additions/GNUstepGUI/GSGhostscriptImageRep.h:
+	* Source/GNUmakefile:
+	* Source/NSImageRep.m: New image rep which attempts to
+	invoke Ghostscript to rasterize PS/EPS/PDF images. It needs
+	some polishing but basically works.
+
 2011-06-26  Wolfgang Lux  <wolfgang.lux@gmail.com>
 
 	* Source/NSTextView_actions.m (-deleteToEndOfParagraph:):

Headers/Additions/GNUstepGUI/GSGhostscriptImageRep.h

@@ -0,0 +1,46 @@
+/* 
+   GSGhostscriptImageRep.h
+
+   Ghostscript image representation.
+
+   Copyright (C) 2011 Free Software Foundation, Inc.
+
+   Written by:  Eric Wasylishen <ewasylishen@gmail.com>
+   Date: June 2011
+   
+   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.
+*/ 
+
+#ifndef _GNUstep_H_GSGhostscriptImageRep
+#define _GNUstep_H_GSGhostscriptImageRep
+
+#import <AppKit/NSBitmapImageRep.h>
+
+@class NSData;
+
+@interface GSGhostscriptImageRep : NSImageRep
+{
+  NSBitmapImageRep *_bitmap;
+  NSData *_psData;
+}
+
+@end
+
+#endif // _GNUstep_H_GSGhostscriptImageRep
+

Source/GNUmakefile

@@ -212,6 +212,7 @@ GSTextFinder.m \
 GSLayoutManager.m \
 GSTypesetter.m \
 GSHorizontalTypesetter.m \
+GSGhostscriptImageRep.m \
 GSGormLoading.m \
 GSIconManager.m \
 GSNibLoading.m \

Source/GSGhostscriptImageRep.m

@@ -0,0 +1,202 @@
+/** <title>GSGhostscriptImageRep</title>
+
+   <abstract>Ghostscript image representation.</abstract>
+
+   Copyright (C) 2011 Free Software Foundation, Inc.
+   
+   Author:  Eric Wasylishen <ewasylishen@gmail.com>
+   Date: June 2011
+   
+   This file is part of the GNUstep Application Kit 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 <Foundation/NSArray.h>
+#import <Foundation/NSAffineTransform.h>
+#import <Foundation/NSCoder.h>
+#import <Foundation/NSData.h>
+#import <Foundation/NSTask.h>
+#import "AppKit/NSImageRep.h"
+#import "AppKit/NSPasteboard.h"
+#import "AppKit/NSGraphicsContext.h"
+#import "GNUstepGUI/GSGhostscriptImageRep.h"
+
+@implementation GSGhostscriptImageRep 
+
++ (BOOL) canInitWithData: (NSData *)data
+{
+  char buf[4];
+
+  if ([data length] < 4)
+    {
+      return NO;
+    }
+
+  [data getBytes: buf length: 4];
+
+  // Simple check for PostScript or EPS, Windows EPS, PDF  
+
+  if ((buf[0] == '%' && buf[1] == '!' && buf[2] == 'P' && buf[3] == 'S') ||
+      (buf[0] == '\xc5' && buf[1] == '\xd0' && buf[2] == '\xd3' && buf[3] == '\xc6') ||
+      (buf[0] == '%' && buf[1] == 'P' && buf[2] == 'D' && buf[3] == 'F'))
+    {
+      return YES;
+    }
+  else
+    {
+      return NO;
+    }
+}
+
++ (NSArray *) imageUnfilteredFileTypes
+{
+  static NSArray *types = nil;
+
+  if (types == nil)
+    {
+      types = [[NSArray alloc] initWithObjects: @"ps", @"eps", @"pdf", nil];
+    }
+
+  return types;
+}
+
++ (NSArray *) imageUnfilteredPasteboardTypes
+{
+  static NSArray *types = nil;
+
+  if (types == nil)
+    {
+      types = [[NSArray alloc] initWithObjects: NSPostScriptPboardType,
+			       NSPDFPboardType,
+			       nil];
+    }
+  
+  return types;
+}
+
+- (NSData *) _pngWithGhostscriptData: (NSData *)psData atResolution: (CGFloat)res
+{
+  NSTask *task = [[[NSTask alloc] init] autorelease];
+  NSPipe *inputPipe = [NSPipe pipe];
+  NSPipe *outputPipe = [NSPipe pipe];
+  NSFileHandle *inputHandle = [inputPipe fileHandleForWriting];
+  NSFileHandle *outputHandle = [outputPipe fileHandleForReading];
+  NSData *result;
+
+  // FIXME: Parameterize
+  [task setLaunchPath: @"/usr/bin/gs"];
+  [task setArguments: [NSArray arrayWithObjects: @"-dSAFER",
+			       @"-q",
+			       @"-o",
+			       @"-", // Write output image to stdout
+			       @"-sDEVICE=pngalpha",
+			       [NSString stringWithFormat: @"-r%d", (int)res],
+			       @"-dTextAlphaBits=4",
+			       @"-dGraphicsAlphaBits=4",
+			       @"-dDOINTERPOLATE",
+			       @"-", // Read input from stdin
+			       nil]];
+  [task setStandardInput: inputPipe];
+  [task setStandardOutput: outputPipe];
+  [task launch];
+
+  [inputHandle writeData: psData];
+  [inputHandle closeFile];
+
+  result = [outputHandle readDataToEndOfFile];
+  [outputHandle closeFile];
+
+  return result;
+}
+
+
+
+// Initializing a New Instance 
++ (id) imageRepWithData: (NSData *)psData
+{
+  return AUTORELEASE([[self alloc] initWithData: psData]);
+}
+
+- (id) initWithData: (NSData *)psData
+{
+  NSData *pngData;
+  
+  ASSIGN(_psData, psData);
+
+  pngData = [self _pngWithGhostscriptData: _psData atResolution: 72.0];
+
+  if (pngData == nil)
+    {
+      [self release];
+      return nil;
+    }
+
+ _bitmap = [NSBitmapImageRep imageRepWithData: pngData];
+ 
+  [self setSize: [_bitmap size]];
+  [self setAlpha: [_bitmap hasAlpha]];
+  [self setBitsPerSample: NSImageRepMatchesDevice];
+  [self setPixelsWide: NSImageRepMatchesDevice];
+  [self setPixelsHigh: NSImageRepMatchesDevice];
+  // FIXME: Other properties?
+
+  return self;
+}
+
+// Drawing the Image 
+- (BOOL) draw
+{
+  if (_bitmap != nil)
+    {
+      // FIXME: Re-cache at a higher resolution if needed
+
+      return [_bitmap draw];
+    }
+  return NO;
+}
+
+// NSCopying protocol
+- (id) copyWithZone: (NSZone *)zone
+{
+  GSGhostscriptImageRep *copy = [super copyWithZone: zone];
+
+  copy->_psData = [_psData copyWithZone: zone];
+  copy->_bitmap = [_bitmap copyWithZone: zone];
+
+  return copy;
+}
+
+// NSCoding protocol
+- (void) encodeWithCoder: (NSCoder*)aCoder
+{
+  // FIXME:
+  [super encodeWithCoder: aCoder];
+  [_psData encodeWithCoder: aCoder];
+}
+
+- (id) initWithCoder: (NSCoder*)aDecoder
+{
+  // FIXME:
+  NSData	*data;
+
+  self = [super initWithCoder: aDecoder];
+  data = [aDecoder decodeObject];
+  return [self initWithData: data];
+}
+
+@end

Source/NSImageRep.m

@@ -44,6 +44,7 @@
 #import "AppKit/NSView.h"
 #import "AppKit/NSColor.h"
 #import "AppKit/DPSOperators.h"
+#import "GNUstepGUI/GSGhostscriptImageRep.h"
 
 static NSMutableArray *imageReps = nil;
 static Class NSImageRep_class = NULL;
@@ -59,7 +60,7 @@ static Class NSImageRep_class = NULL;
       NSImageRep_class = self;
       imageReps = [[NSMutableArray alloc] initWithCapacity: 2];
       [imageReps addObject: [NSBitmapImageRep class]];
-      //[imageReps addObject: [NSEPSImageRep class]];
+      [imageReps addObject: [GSGhostscriptImageRep class]];
     }
 }