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(*
GTK-Kylix Library: GTKPixbuf - Image handling routines
Copyright (C) 2003 Tomas Bzatek <tbzatek@users.sourceforge.net>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library 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 Library General Public
License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307 USA.
*)
unit GTKPixbuf;
interface
uses lazglib2, lazgobject2, lazgdk3, lazgtk3, lazgdkpixbuf2, Classes, GTKControls;
type
TGTKIconSize = (isInvalid, isMenu, isSmallToolbar, isLargeToolbar, isButton, isDND, isDialog);
(****************************************** TGDKPIXBUF **************************************************************************)
TGDKPixbuf = class (TComponent)
private
function GetWidth: integer;
function GetHeight: integer;
function GetBPP: integer;
protected
public
FPixbuf: PGdkPixbuf;
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
function LoadFromFile(const FileName: string): boolean;
function LoadFromResource(ResourcePath: string): boolean;
function LoadFromIconTheme(IconName: string; IconSize: Integer): boolean;
procedure Fill(const Pixel: Cardinal);
procedure ScaleSimple(const DestWidth, DestHeight: integer);
function Copy: PGdkPixbuf;
procedure CopyArea(Source: TGDKPixbuf; SourceX, SourceY, SourceWidth, SourceHeight, DestX, DestY: integer);
published
property Width: integer read GetWidth;
property Height: integer read GetHeight;
property BPP: integer read GetBPP;
end;
(****************************************** TGTKIMAGE ***************************************************************************)
TGTKImage = class(TGTKControl)
private
protected
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure LoadFromFile(const FileName: string);
procedure SetFromPixbuf(Pixbuf: TGDKPixbuf);
function GetPixbuf: PGdkPixbuf;
procedure CopyFromPixbuf(Pixbuf: TGDKPixbuf);
procedure SetFromIconName(IconName: string; IconSize: TGTKIconSize);
end;
(********************************************************************************************************************************)
(********************************************************************************************************************************)
implementation
uses SysUtils, DateUtils;
(********************************************************************************************************************************)
(********************************************************************************************************************************)
constructor TGDKPixbuf.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FPixbuf := nil;
end;
destructor TGDKPixbuf.Destroy;
begin
if FPixbuf <> nil then g_object_unref(FPixbuf);
inherited Destroy;
end;
function TGDKPixbuf.GetWidth: integer;
begin
Result := gdk_pixbuf_get_width(FPixbuf);
end;
function TGDKPixbuf.GetHeight: integer;
begin
Result := gdk_pixbuf_get_height(FPixbuf);
end;
function TGDKPixbuf.GetBPP: integer;
begin
Result := gdk_pixbuf_get_bits_per_sample(FPixbuf);
end;
function TGDKPixbuf.LoadFromFile(const FileName: string): boolean;
var P: Pointer;
Error: PGError;
begin
Error := nil;
P := gdk_pixbuf_new_from_file(PChar(FileName), @Error);
Result := P <> nil;
if P <> nil then FPixbuf := P;
end;
function TGDKPixbuf.LoadFromResource(ResourcePath: string): boolean;
var P: Pointer;
Error: PGError;
begin
Error := nil;
P := gdk_pixbuf_new_from_resource(PChar(ResourcePath), @Error);
Result := P <> nil;
if Error <> nil then begin
WriteLn('TGDKPixbuf.LoadFromResource error: ', Error^.message);
g_error_free(Error);
end;
if P <> nil then FPixbuf := P;
end;
function TGDKPixbuf.LoadFromIconTheme(IconName: string; IconSize: Integer): boolean;
var P: Pointer;
Error: PGError;
begin
Error := nil;
P := gtk_icon_theme_load_icon(gtk_icon_theme_get_default(), PChar(IconName), IconSize, [], @Error);
Result := P <> nil;
if Error <> nil then begin
WriteLn('TGDKPixbuf.LoadFromIconTheme error: ', Error^.message);
g_error_free(Error);
end;
if P <> nil then FPixbuf := P;
end;
procedure TGDKPixbuf.Fill(const Pixel: Cardinal);
begin
gdk_pixbuf_fill(FPixbuf, Pixel);
end;
procedure TGDKPixbuf.ScaleSimple(const DestWidth, DestHeight: integer);
begin
FPixbuf := gdk_pixbuf_scale_simple(FPixbuf, DestWidth, DestHeight, GDK_INTERP_BILINEAR);
end;
function TGDKPixbuf.Copy: PGdkPixbuf;
begin
Result := gdk_pixbuf_copy(FPixbuf);
end;
procedure TGDKPixbuf.CopyArea(Source: TGDKPixbuf; SourceX, SourceY, SourceWidth, SourceHeight, DestX, DestY: integer);
begin
gdk_pixbuf_copy_area(Source.FPixbuf, SourceX, SourceY, SourceWidth, SourceHeight, FPixbuf, DestX, DestY);
end;
(********************************************************************************************************************************)
(********************************************************************************************************************************)
constructor TGTKImage.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FWidget := gtk_image_new;
Show;
end;
destructor TGTKImage.Destroy;
begin
inherited Destroy;
end;
procedure TGTKImage.LoadFromFile(const FileName: string);
begin
gtk_image_set_from_file(PGtkImage(FWidget), PChar(FileName));
end;
function TGTKImage.GetPixbuf: PGdkPixbuf;
begin
Result := gtk_image_get_pixbuf(PGtkImage(FWidget));
end;
procedure TGTKImage.SetFromPixbuf(Pixbuf: TGDKPixbuf);
begin
gtk_image_set_from_pixbuf(PGtkImage(FWidget), Pixbuf.FPixbuf);
end;
procedure TGTKImage.CopyFromPixbuf(Pixbuf: TGDKPixbuf);
begin
gtk_image_set_from_pixbuf(PGtkImage(FWidget), Pixbuf.Copy);
end;
procedure TGTKImage.SetFromIconName(IconName: string; IconSize: TGTKIconSize);
begin
gtk_image_set_from_icon_name(PGtkImage(FWidget), PChar(IconName), lazgtk3.TGtkIconSize(IconSize));
end;
(********************************************************************************************************************************)
end.
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