bug 107025 (part of bug 90813)

anti-aliased scaled bitmap font object code
r=shanjian@netscape.com, sr=blizzard@mozilla.org

gfx/src/gtk/nsXFont.h

@@ -0,0 +1,67 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ex: set tabstop=8 softtabstop=2 shiftwidth=2 expandtab: */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: NPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2001
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Brian Stell <bstell@netscape.com>
+ *
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the NPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the NPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef nsXFont_h__
+#define nsXFont_h__
+
+class nsXFont {
+public:
+  virtual ~nsXFont() { };
+  virtual void         DrawText8(GdkDrawable *Drawable, GdkGC *GC, PRInt32,
+                                 PRInt32, const char *, PRUint32) = 0;
+  virtual void         DrawText16(GdkDrawable *Drawable, GdkGC *GC, PRInt32,
+                                  PRInt32, const XChar2b *, PRUint32) = 0;
+  virtual PRBool       GetXFontProperty(Atom, unsigned long *) = 0;
+  virtual XFontStruct *GetXFontStruct() = 0;
+  inline  PRBool       IsSingleByte() { return mIsSingleByte; };
+  virtual PRBool       LoadFont() = 0;
+  virtual void         TextExtents8(const char *, PRUint32, PRInt32*, PRInt32*,
+                                   PRInt32*, PRInt32*, PRInt32*) = 0;
+  virtual void         TextExtents16(const XChar2b *, PRUint32, PRInt32*,
+                                     PRInt32*, PRInt32*, PRInt32*, PRInt32*) =0;
+  virtual PRInt32      TextWidth8(const char *, PRUint32) = 0;
+  virtual PRInt32      TextWidth16(const XChar2b *, PRUint32) = 0;
+//protected:
+  virtual void         UnloadFont() = 0;
+protected:
+  PRBool mIsSingleByte;
+};
+
+#endif /* nsXFont_h__ */

gfx/src/gtk/nsXFontAAScaledBitmap.h

@@ -0,0 +1,120 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ex: set tabstop=8 softtabstop=2 shiftwidth=2 expandtab: */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: NPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2001
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Brian Stell <bstell@netscape.com>
+ *
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the NPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the NPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef nsXFontAAScaledBitmap_h__
+#define nsXFontAAScaledBitmap_h__
+
+#include <gdk/gdk.h>
+#include <gdk/gdkx.h>
+
+#include <X11/Xlib.h>
+#include "nspr.h"
+#include "nsXFont.h"
+#include "nsAntiAliasedGlyph.h"
+
+extern PRUint8 gAASBDarkTextMinValue;
+extern double  gAASBDarkTextGain;
+extern PRUint8 gAASBLightTextMinValue;
+extern double  gAASBLightTextGain;
+
+
+#define SCALED_SIZE(x) (PRInt32)(rint(((double)(x))*mRatio))
+class nsHashtable;
+
+class nsXFontAAScaledBitmap : public nsXFont {
+public:
+  nsXFontAAScaledBitmap(Display *aDisplay, int aScreen, GdkFont *,
+                        PRUint32, PRUint32);
+  ~nsXFontAAScaledBitmap();
+
+  void         DrawText8(GdkDrawable *Drawable, GdkGC *GC, PRInt32, PRInt32,
+                         const char *, PRUint32);
+  void         DrawText16(GdkDrawable *Drawable, GdkGC *GC, PRInt32, PRInt32,
+                          const XChar2b *, PRUint32);
+  PRBool       GetXFontProperty(Atom, unsigned long *);
+  XFontStruct *GetXFontStruct();
+  PRBool       LoadFont();
+  void         TextExtents8(const char *, PRUint32, PRInt32*, PRInt32*,
+                            PRInt32*, PRInt32*, PRInt32*);
+  void         TextExtents16(const XChar2b *, PRUint32, PRInt32*, PRInt32*,
+                             PRInt32*, PRInt32*, PRInt32*);
+  PRInt32      TextWidth8(const char *, PRUint32);
+  PRInt32      TextWidth16(const XChar2b *, PRUint32);
+  void         UnloadFont();
+
+public:
+  static PRBool InitGlobals(Display *aDisplay, int aScreen);
+  static void   FreeGlobals();
+
+protected:
+  void         DrawText8or16(GdkDrawable *Drawable, GdkGC *GC, PRInt32,
+                             PRInt32, void *, PRUint32);
+  void         TextExtents8or16(void *, PRUint32, PRInt32*, PRInt32*,
+                             PRInt32*, PRInt32*, PRInt32*);
+  PRBool GetScaledGreyImage(const char *, nsAntiAliasedGlyph **);
+#ifdef DEBUG
+  void dump_XImage_blue_data(XImage *ximage);
+#endif
+
+protected:
+  PRBool       mAlreadyLoaded;
+  Display     *mDisplay;
+  GC           mForegroundGC;
+  GdkFont     *mGdkFont;
+  nsHashtable* mGlyphHash;
+  double       mRatio;
+  XFontStruct  mScaledFontInfo;
+  GlyphMetrics mScaledMax;
+  int          mScreen;
+  Pixmap       mUnscaledBitmap;
+  XFontStruct *mUnscaledFontInfo;
+  GlyphMetrics mUnscaledMax;
+  PRUint16     mUnscaledSize;
+
+// class globals
+protected:
+  static Display *sDisplay;
+  static GC       sBackgroundGC; // used to clear the pixmaps
+                                 // before drawing the glyph
+  static PRUint8  sWeightedScaleDarkText[256];
+  static PRUint8  sWeightedScaleLightText[256];
+};
+
+#endif /* nsXFontAAScaledBitmap_h__ */

gfx/src/gtk/nsXFontNormal.cpp

@@ -0,0 +1,153 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ex: set tabstop=8 softtabstop=2 shiftwidth=2 expandtab: */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: NPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2001
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Brian Stell <bstell@netscape.com>
+ *
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the NPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the NPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "nscore.h"
+#include "nsXFontNormal.h"
+#include "nsRenderingContextGTK.h"
+
+void
+nsXFontNormal::DrawText8(GdkDrawable *aDrawable, GdkGC *aGC,
+                         PRInt32 aX, PRInt32 aY,
+                        const char *aString, PRUint32 aLength)
+{
+  nsRenderingContextGTK::my_gdk_draw_text(aDrawable, mGdkFont, aGC,
+                                          aX, aY, aString, aLength);
+}
+
+void
+nsXFontNormal::DrawText16(GdkDrawable *aDrawable, GdkGC *aGC,
+                         PRInt32 aX, PRInt32 aY,
+                        const XChar2b *aString, PRUint32 aLength)
+{
+  nsRenderingContextGTK::my_gdk_draw_text(aDrawable, mGdkFont, aGC,
+                                          aX, aY,
+                                          (const char *)aString, aLength*2);
+}
+
+PRBool
+nsXFontNormal::GetXFontProperty(Atom aAtom, unsigned long *aValue)
+{
+  NS_ASSERTION(mGdkFont, "GetXFontProperty called before font loaded");
+  if (mGdkFont==nsnull)
+    return PR_FALSE;
+
+  XFontStruct *fontInfo = (XFontStruct *)GDK_FONT_XFONT(mGdkFont);
+
+  return ::XGetFontProperty(fontInfo, aAtom, aValue);
+}
+
+XFontStruct *
+nsXFontNormal::GetXFontStruct()
+{
+  NS_ASSERTION(mGdkFont, "GetXFontStruct called before font loaded");
+  if (mGdkFont==nsnull)
+    return nsnull;
+
+  return (XFontStruct *)GDK_FONT_XFONT(mGdkFont);
+}
+
+PRBool
+nsXFontNormal::LoadFont()
+{
+  if (!mGdkFont)
+    return PR_FALSE;
+  XFontStruct *fontInfo = (XFontStruct *)GDK_FONT_XFONT(mGdkFont);
+  mIsSingleByte = (fontInfo->min_byte1 == 0) && (fontInfo->max_byte1 == 0);
+  return PR_TRUE;
+}
+
+nsXFontNormal::nsXFontNormal(GdkFont *aGdkFont)
+{
+  mGdkFont = ::gdk_font_ref(aGdkFont);
+}
+
+void
+nsXFontNormal::TextExtents8(const char *aString, PRUint32 aLength,
+                            PRInt32* aLBearing, PRInt32* aRBearing,
+                            PRInt32* aWidth, PRInt32* aAscent,
+                            PRInt32* aDescent)
+{
+  gdk_text_extents(mGdkFont, aString, aLength,
+                    aLBearing, aRBearing, aWidth, aAscent, aDescent);
+}
+
+void
+nsXFontNormal::TextExtents16(const XChar2b *aString, PRUint32 aLength,
+                            PRInt32* aLBearing, PRInt32* aRBearing,
+                            PRInt32* aWidth, PRInt32* aAscent,
+                            PRInt32* aDescent)
+{
+  gdk_text_extents(mGdkFont, (const char *)aString, aLength*2,
+                    aLBearing, aRBearing, aWidth, aAscent, aDescent);
+}
+
+PRInt32
+nsXFontNormal::TextWidth8(const char *aString, PRUint32 aLength)
+{
+  NS_ASSERTION(mGdkFont, "TextWidth8 called before font loaded");
+  if (mGdkFont==nsnull)
+    return 0;
+  PRInt32 width = gdk_text_width(mGdkFont, aString, aLength);
+  return width;
+}
+
+PRInt32
+nsXFontNormal::TextWidth16(const XChar2b *aString, PRUint32 aLength)
+{
+  NS_ASSERTION(mGdkFont, "TextWidth16 called before font loaded");
+  if (mGdkFont==nsnull)
+    return 0;
+  PRInt32 width = gdk_text_width(mGdkFont, (const char *)aString, aLength*2);
+  return width;
+}
+
+void
+nsXFontNormal::UnloadFont()
+{
+  delete this;
+}
+
+nsXFontNormal::~nsXFontNormal()
+{
+  if (mGdkFont) {
+    ::gdk_font_unref(mGdkFont);
+  }
+}
+

gfx/src/gtk/nsXFontNormal.h

@@ -0,0 +1,74 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ex: set tabstop=8 softtabstop=2 shiftwidth=2 expandtab: */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: NPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2001
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Brian Stell <bstell@netscape.com>
+ *
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the NPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the NPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef nsXFontNormal_h__
+#define nsXFontNormal_h__
+
+#include <gdk/gdk.h>
+#include <gdk/gdkx.h>
+
+#include <X11/Xlib.h>
+#include "nspr.h"
+#include "nsXFont.h"
+
+class nsXFontNormal : public nsXFont {
+public:
+  nsXFontNormal(GdkFont *);
+  ~nsXFontNormal();
+
+  void         DrawText8(GdkDrawable *Drawable, GdkGC *GC, PRInt32, PRInt32,
+                         const char *, PRUint32);
+  void         DrawText16(GdkDrawable *Drawable, GdkGC *GC, PRInt32, PRInt32,
+                          const XChar2b *, PRUint32);
+  PRBool       GetXFontProperty(Atom, unsigned long *);
+  XFontStruct *GetXFontStruct();
+  PRBool       LoadFont();
+  void         TextExtents8(const char *, PRUint32, PRInt32*, PRInt32*,
+                            PRInt32*, PRInt32*, PRInt32*);
+  void         TextExtents16(const XChar2b *, PRUint32, PRInt32*, PRInt32*,
+                             PRInt32*, PRInt32*, PRInt32*);
+  PRInt32      TextWidth8(const char *, PRUint32);
+  PRInt32      TextWidth16(const XChar2b *, PRUint32);
+  void         UnloadFont();
+protected:
+  GdkFont *mGdkFont;
+};
+
+#endif /* nsXFontNormal_h__ */