Implement extended graphics ops (composite, etc).

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@4262 72102866-910b-0410-8b05-ffd578937521

Source/NSGraphicsContext.m

@@ -619,6 +619,21 @@ struct NSWindow_struct
     GET_IMP(@selector(DPSsetrgbactual::::));
   methodTable.DPScapturegstate_ =
     GET_IMP(@selector(DPScapturegstate:));
+/*-------------------------------------------------------------------------*/
+/* Graphics Extension Ops */
+/*-------------------------------------------------------------------------*/
+  methodTable.DPScomposite________ = 
+    GET_IMP(@selector(DPScomposite::::::::));
+  methodTable.DPScompositerect_____ = 
+    GET_IMP(@selector(DPScompositerect:::::));
+  methodTable.DPSdissolve________ = 
+    GET_IMP(@selector(DPSdissolve::::::::));
+  methodTable.DPSreadimage = 
+    GET_IMP(@selector(DPSreadimage));
+  methodTable.DPSsetalpha_ = 
+    GET_IMP(@selector(DPSsetalpha:));
+  methodTable.DPScurrentalpha_ = 
+    GET_IMP(@selector(DPScurrentalpha:));
 
   mptr = NSZoneMalloc(_globalGSZone, sizeof(gsMethodTable));
   memcpy(mptr, &methodTable, sizeof(gsMethodTable));
@@ -1476,6 +1491,40 @@ struct NSWindow_struct
   [self subclassResponsibility: _cmd];
 }
 
+/*-------------------------------------------------------------------------*/
+/* Graphics Extension Ops */
+/*-------------------------------------------------------------------------*/
+- (void) DPScomposite: (float)x : (float)y : (float)w : (float)h : (int)gstateNum : (float)dx : (float)dy : (int)op
+{
+  [self subclassResponsibility: _cmd];
+}
+
+- (void) DPScompositerect: (float)x : (float)y : (float)w : (float)h : (int)op
+{
+  [self subclassResponsibility: _cmd];
+}
+
+- (void) DPSdissolve: (float)x : (float)y : (float)w : (float)h : (int)gstateNum
+ : (float)dx : (float)dy : (float)delta
+{
+  [self subclassResponsibility: _cmd];
+}
+
+- (void) DPSreadimage
+{
+  [self subclassResponsibility: _cmd];
+}
+
+- (void) DPSsetalpha: (float)a
+{
+  [self subclassResponsibility: _cmd];
+}
+
+- (void) DPScurrentalpha: (float *)alpha
+{
+  [self subclassResponsibility: _cmd];
+}
+
 /* ----------------------------------------------------------------------- */
 /* GNUstep Event and other I/O extensions */
 /* ----------------------------------------------------------------------- */

Source/NSImageRep.m

@@ -35,13 +35,9 @@
 #include <AppKit/NSBitmapImageRep.h>
 #include <AppKit/NSEPSImageRep.h>
 #include <AppKit/NSPasteboard.h>
-
-/* Backend protocol - methods that must be implemented by the backend to
-   complete the class */
-@protocol NXImageRepBackend
-- (BOOL) drawAtPoint: (NSPoint)aPoint;
-- (BOOL) drawInRect: (NSRect)aRect;
-@end
+#include <AppKit/NSGraphicsContext.h>
+#include <AppKit/NSView.h>
+#include <AppKit/DPSOperators.h>
 
 static NSMutableArray*	imageReps = NULL;
 
@@ -284,23 +280,51 @@ static NSMutableArray*	imageReps = NULL;
 
 - (BOOL) drawAtPoint: (NSPoint)aPoint
 {
-  NSRect        r;
+  BOOL ok, reset;
+  NSGraphicsContext *ctxt;
 
-  if (aPoint.x == 0 && aPoint.y == 0)
-    return [self draw];
-  r.origin = aPoint;
-  r.size = size;
-  return [self drawInRect: r];
+  if (size.width == 0 && size.height == 0)
+    return NO;
+
+  NSDebugLLog(@"NSImage", @"Drawing at point %f %f\n", aPoint.x, aPoint.y);
+  reset = 0;
+  ctxt = GSCurrentContext();
+  if (aPoint.x != 0 || aPoint.y != 0)
+    {
+      if ([[ctxt focusView] isFlipped])
+	aPoint.y -= size.height;
+      DPSmatrix(ctxt); DPScurrentmatrix(ctxt);
+      DPStranslate(ctxt, aPoint.x, aPoint.y);
+      reset = 1;
+    }
+  ok = [self draw];
+  if (reset)
+    DPSsetmatrix(ctxt);
+  return ok;
 }
 
 - (BOOL) drawInRect: (NSRect)aRect
 {
-  float	x, y;
+  NSSize scale;
+  BOOL ok;
+  NSGraphicsContext *ctxt;
 
-  if (size.height == 0 || size.width == 0)
+  NSDebugLLog(@"NSImage", @"Drawing in rect (%f %f %f %f)\n", 
+	      NSMinX(aRect), NSMinY(aRect), NSWidth(aRect), NSHeight(aRect));
+  if (size.width == 0 && size.height == 0)
     return NO;
-/* FIXME - should scale and move as necessary. */
-  return NO;
+
+  ctxt = GSCurrentContext();
+  scale = NSMakeSize(NSWidth(aRect) / size.width, 
+		     NSHeight(aRect) / size.height);
+  if ([[ctxt focusView] isFlipped])
+    aRect.origin.y -= NSHeight(aRect);
+  DPSmatrix(ctxt); DPScurrentmatrix(ctxt);
+  DPStranslate(ctxt, NSMinX(aRect), NSMinY(aRect));
+  DPSscale(ctxt, scale.width, scale.height);
+  ok = [self draw];
+  DPSsetmatrix(ctxt);
+  return ok;
 }
 
 // Managing NSImageRep Subclasses

Source/NSWindow.m

@@ -1800,6 +1800,7 @@ static Class	responderClass;
   original_responder = nil;
   delegate = nil;
   window_num = 0;
+  gstate = 0;
   background_color = [[NSColor controlColor] retain];
   represented_filename = @"Window";
   miniaturized_title = @"Window";