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{
$Id: ImagingClasses.pas 173 2009-09-04 17:05:52Z galfar $
Vampyre Imaging Library
by Marek Mauder
http://imaginglib.sourceforge.net
The contents of this file are used with permission, subject to the Mozilla
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/MPL/MPL-1.1.html
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.
Alternatively, the contents of this file may be used under the terms of the
GNU Lesser General Public License (the "LGPL License"), in which case the
provisions of the LGPL License are applicable instead of those above.
If you wish to allow use of your version of this file only under the terms
of the LGPL License and not to allow others to use your version of this file
under the MPL, indicate your decision by deleting the provisions above and
replace them with the notice and other provisions required by the LGPL
License. If you do not delete the provisions above, a recipient may use
your version of this file under either the MPL or the LGPL License.
For more information about the LGPL: http://www.gnu.org/copyleft/lesser.html
}
{ This unit contains class based wrapper to Imaging library.}
unit ImagingClasses;
{$I ImagingOptions.inc}
interface
uses
Types, Classes, ImagingTypes, Imaging, ImagingFormats, ImagingUtility;
type
{ Base abstract high level class wrapper to low level Imaging structures and
functions.}
TBaseImage = class(TPersistent)
protected
FPData: PImageData;
FOnDataSizeChanged: TNotifyEvent;
FOnPixelsChanged: TNotifyEvent;
function GetFormat: TImageFormat; {$IFDEF USE_INLINE}inline;{$ENDIF}
function GetHeight: LongInt; {$IFDEF USE_INLINE}inline;{$ENDIF}
function GetSize: LongInt; {$IFDEF USE_INLINE}inline;{$ENDIF}
function GetWidth: LongInt; {$IFDEF USE_INLINE}inline;{$ENDIF}
function GetBits: Pointer; {$IFDEF USE_INLINE}inline;{$ENDIF}
function GetPalette: PPalette32; {$IFDEF USE_INLINE}inline;{$ENDIF}
function GetPaletteEntries: LongInt; {$IFDEF USE_INLINE}inline;{$ENDIF}
function GetScanLine(Index: LongInt): Pointer; {$IFDEF USE_INLINE}inline;{$ENDIF}
function GetPixelPointer(X, Y: LongInt): Pointer; {$IFDEF USE_INLINE}inline;{$ENDIF}
function GetFormatInfo: TImageFormatInfo; {$IFDEF USE_INLINE}inline;{$ENDIF}
function GetValid: Boolean; {$IFDEF USE_INLINE}inline;{$ENDIF}
function GetBoundsRect: TRect;
procedure SetFormat(const Value: TImageFormat); {$IFDEF USE_INLINE}inline;{$ENDIF}
procedure SetHeight(const Value: LongInt); {$IFDEF USE_INLINE}inline;{$ENDIF}
procedure SetWidth(const Value: LongInt); {$IFDEF USE_INLINE}inline;{$ENDIF}
procedure SetPointer; virtual; abstract;
procedure DoDataSizeChanged; virtual;
procedure DoPixelsChanged; virtual;
published
public
constructor Create; virtual;
constructor CreateFromImage(AImage: TBaseImage);
destructor Destroy; override;
{ Returns info about current image.}
function ToString: string; {$IF Defined(DCC) and (CompilerVersion >= 20.0)}override;{$IFEND}
{ Creates a new image data with the given size and format. Old image
data is lost. Works only for the current image of TMultiImage.}
procedure RecreateImageData(AWidth, AHeight: LongInt; AFormat: TImageFormat);
{ Resizes current image with optional resampling.}
procedure Resize(NewWidth, NewHeight: LongInt; Filter: TResizeFilter);
{ Flips current image. Reverses the image along its horizontal axis the top
becomes the bottom and vice versa.}
procedure Flip;
{ Mirrors current image. Reverses the image along its vertical axis the left
side becomes the right and vice versa.}
procedure Mirror;
{ Rotates image by Angle degrees counterclockwise.}
procedure Rotate(Angle: Single);
{ Copies rectangular part of SrcImage to DstImage. No blending is performed -
alpha is simply copied to destination image. Operates also with
negative X and Y coordinates.
Note that copying is fastest for images in the same data format
(and slowest for images in special formats).}
procedure CopyTo(SrcX, SrcY, Width, Height: LongInt; DstImage: TBaseImage; DstX, DstY: LongInt);
{ Stretches the contents of the source rectangle to the destination rectangle
with optional resampling. No blending is performed - alpha is
simply copied/resampled to destination image. Note that stretching is
fastest for images in the same data format (and slowest for
images in special formats).}
procedure StretchTo(SrcX, SrcY, SrcWidth, SrcHeight: LongInt; DstImage: TBaseImage; DstX, DstY, DstWidth, DstHeight: LongInt; Filter: TResizeFilter);
{ Replaces pixels with OldPixel in the given rectangle by NewPixel.
OldPixel and NewPixel should point to the pixels in the same format
as the given image is in.}
procedure ReplaceColor(X, Y, Width, Height: LongInt; OldColor, NewColor: Pointer);
{ Swaps SrcChannel and DstChannel color or alpha channels of image.
Use ChannelRed, ChannelBlue, ChannelGreen, ChannelAlpha constants to
identify channels.}
procedure SwapChannels(SrcChannel, DstChannel: LongInt);
{ Loads current image data from file.}
procedure LoadFromFile(const FileName: string); virtual;
{ Loads current image data from stream.}
procedure LoadFromStream(Stream: TStream); virtual;
{ Saves current image data to file.}
procedure SaveToFile(const FileName: string);
{ Saves current image data to stream. Ext identifies desired image file
format (jpg, png, dds, ...)}
procedure SaveToStream(const Ext: string; Stream: TStream);
{ Width of current image in pixels.}
property Width: LongInt read GetWidth write SetWidth;
{ Height of current image in pixels.}
property Height: LongInt read GetHeight write SetHeight;
{ Image data format of current image.}
property Format: TImageFormat read GetFormat write SetFormat;
{ Size in bytes of current image's data.}
property Size: LongInt read GetSize;
{ Pointer to memory containing image bits.}
property Bits: Pointer read GetBits;
{ Pointer to palette for indexed format images. It is nil for others.
Max palette entry is at index [PaletteEntries - 1].}
property Palette: PPalette32 read GetPalette;
{ Number of entries in image's palette}
property PaletteEntries: LongInt read GetPaletteEntries;
{ Provides indexed access to each line of pixels. Does not work with special
format images (like DXT).}
property ScanLine[Index: LongInt]: Pointer read GetScanLine;
{ Returns pointer to image pixel at [X, Y] coordinates.}
property PixelPointers[X, Y: LongInt]: Pointer read GetPixelPointer;
{ Extended image format information.}
property FormatInfo: TImageFormatInfo read GetFormatInfo;
{ This gives complete access to underlying TImageData record.
It can be used in functions that take TImageData as parameter
(for example: ReduceColors(SingleImageInstance.ImageData^, 64)).}
property ImageDataPointer: PImageData read FPData;
{ Indicates whether the current image is valid (proper format,
allowed dimensions, right size, ...).}
property Valid: Boolean read GetValid;
{{ Specifies the bounding rectangle of the image.}
property BoundsRect: TRect read GetBoundsRect;
{ This event occurs when the image data size has just changed. That means
image width, height, or format has been changed.}
property OnDataSizeChanged: TNotifyEvent read FOnDataSizeChanged write FOnDataSizeChanged;
{ This event occurs when some pixels of the image have just changed.}
property OnPixelsChanged: TNotifyEvent read FOnPixelsChanged write FOnPixelsChanged;
end;
{ Extension of TBaseImage which uses single TImageData record to
store image. All methods inherited from TBaseImage work with this record.}
TSingleImage = class(TBaseImage)
protected
FImageData: TImageData;
procedure SetPointer; override;
public
constructor Create; override;
constructor CreateFromParams(AWidth, AHeight: LongInt; AFormat: TImageFormat = ifDefault);
constructor CreateFromData(const AData: TImageData);
constructor CreateFromFile(const FileName: string);
constructor CreateFromStream(Stream: TStream);
destructor Destroy; override;
{ Assigns single image from another single image or multi image.}
procedure Assign(Source: TPersistent); override;
end;
{ Extension of TBaseImage which uses array of TImageData records to
store multiple images. Images are independent on each other and they don't
share any common characteristic. Each can have different size, format, and
palette. All methods inherited from TBaseImage work only with
active image (it could represent mipmap level, animation frame, or whatever).
Methods whose names contain word 'Multi' work with all images in array
(as well as other methods with obvious names).}
TMultiImage = class(TBaseImage)
protected
FDataArray: TDynImageDataArray;
FActiveImage: LongInt;
procedure SetActiveImage(Value: LongInt); {$IFDEF USE_INLINE}inline;{$ENDIF}
function GetImageCount: LongInt; {$IFDEF USE_INLINE}inline;{$ENDIF}
procedure SetImageCount(Value: LongInt);
function GetAllImagesValid: Boolean; {$IFDEF USE_INLINE}inline;{$ENDIF}
function GetImage(Index: LongInt): TImageData; {$IFDEF USE_INLINE}inline;{$ENDIF}
procedure SetImage(Index: LongInt; Value: TImageData); {$IFDEF USE_INLINE}inline;{$ENDIF}
procedure SetPointer; override;
function PrepareInsert(Index, Count: LongInt): Boolean;
procedure DoInsertImages(Index: LongInt; const Images: TDynImageDataArray);
procedure DoInsertNew(Index: LongInt; AWidth, AHeight: LongInt; AFormat: TImageFormat);
public
constructor Create; override;
constructor CreateFromParams(AWidth, AHeight: LongInt; AFormat: TImageFormat; Images: LongInt);
constructor CreateFromArray(ADataArray: TDynImageDataArray);
constructor CreateFromFile(const FileName: string);
constructor CreateFromStream(Stream: TStream);
destructor Destroy; override;
{ Assigns multi image from another multi image or single image.}
procedure Assign(Source: TPersistent); override;
{ Adds new image at the end of the image array. }
procedure AddImage(AWidth, AHeight: LongInt; AFormat: TImageFormat = ifDefault); overload;
{ Adds existing image at the end of the image array. }
procedure AddImage(const Image: TImageData); overload;
{ Adds existing image (Active image of a TmultiImage)
at the end of the image array. }
procedure AddImage(Image: TBaseImage); overload;
{ Adds existing image array ((all images of a multi image))
at the end of the image array. }
procedure AddImages(const Images: TDynImageDataArray); overload;
{ Adds existing MultiImage images at the end of the image array. }
procedure AddImages(Images: TMultiImage); overload;
{ Inserts new image image at the given position in the image array. }
procedure InsertImage(Index, AWidth, AHeight: LongInt; AFormat: TImageFormat = ifDefault); overload;
{ Inserts existing image at the given position in the image array. }
procedure InsertImage(Index: LongInt; const Image: TImageData); overload;
{ Inserts existing image (Active image of a TmultiImage)
at the given position in the image array. }
procedure InsertImage(Index: LongInt; Image: TBaseImage); overload;
{ Inserts existing image at the given position in the image array. }
procedure InsertImages(Index: LongInt; const Images: TDynImageDataArray); overload;
{ Inserts existing images (all images of a TmultiImage) at
the given position in the image array. }
procedure InsertImages(Index: LongInt; Images: TMultiImage); overload;
{ Exchanges two images at the given positions in the image array. }
procedure ExchangeImages(Index1, Index2: LongInt);
{ Deletes image at the given position in the image array.}
procedure DeleteImage(Index: LongInt);
{ Rearranges images so that the first image will become last and vice versa.}
procedure ReverseImages;
{ Converts all images to another image data format.}
procedure ConvertImages(Format: TImageFormat);
{ Resizes all images.}
procedure ResizeImages(NewWidth, NewHeight: LongInt; Filter: TResizeFilter);
{ Overloaded loading method that will add new image to multiimage if
image array is empty bero loading. }
procedure LoadFromFile(const FileName: string); override;
{ Overloaded loading method that will add new image to multiimage if
image array is empty bero loading. }
procedure LoadFromStream(Stream: TStream); override;
{ Loads whole multi image from file.}
procedure LoadMultiFromFile(const FileName: string);
{ Loads whole multi image from stream.}
procedure LoadMultiFromStream(Stream: TStream);
{ Saves whole multi image to file.}
procedure SaveMultiToFile(const FileName: string);
{ Saves whole multi image to stream. Ext identifies desired
image file format (jpg, png, dds, ...).}
procedure SaveMultiToStream(const Ext: string; Stream: TStream);
{ Indicates active image of this multi image. All methods inherited
from TBaseImage operate on this image only.}
property ActiveImage: LongInt read FActiveImage write SetActiveImage;
{ Number of images of this multi image.}
property ImageCount: LongInt read GetImageCount write SetImageCount;
{ This value is True if all images of this TMultiImage are valid.}
property AllImagesValid: Boolean read GetAllImagesValid;
{ This gives complete access to underlying TDynImageDataArray.
It can be used in functions that take TDynImageDataArray
as parameter.}
property DataArray: TDynImageDataArray read FDataArray;
{ Array property for accessing individual images of TMultiImage. When you
set image at given index the old image is freed and the source is cloned.}
property Images[Index: LongInt]: TImageData read GetImage write SetImage; default;
end;
implementation
const
DefaultWidth = 16;
DefaultHeight = 16;
DefaultImages = 1;
function GetArrayFromImageData(const ImageData: TImageData): TDynImageDataArray;
begin
SetLength(Result, 1);
Result[0] := ImageData;
end;
{ TBaseImage class implementation }
constructor TBaseImage.Create;
begin
SetPointer;
end;
constructor TBaseImage.CreateFromImage(AImage: TBaseImage);
begin
Create;
Assign(AImage);
end;
destructor TBaseImage.Destroy;
begin
inherited Destroy;
end;
function TBaseImage.GetWidth: LongInt;
begin
if Valid then
Result := FPData.Width
else
Result := 0;
end;
function TBaseImage.GetHeight: LongInt;
begin
if Valid then
Result := FPData.Height
else
Result := 0;
end;
function TBaseImage.GetFormat: TImageFormat;
begin
if Valid then
Result := FPData.Format
else
Result := ifUnknown;
end;
function TBaseImage.GetScanLine(Index: LongInt): Pointer;
var
Info: TImageFormatInfo;
begin
if Valid then
begin
Info := GetFormatInfo;
if not Info.IsSpecial then
Result := ImagingFormats.GetScanLine(FPData.Bits, Info, FPData.Width, Index)
else
Result := FPData.Bits;
end
else
Result := nil;
end;
function TBaseImage.GetPixelPointer(X, Y: LongInt): Pointer;
begin
if Valid then
Result := @PByteArray(FPData.Bits)[(Y * FPData.Width + X) * GetFormatInfo.BytesPerPixel]
else
Result := nil;
end;
function TBaseImage.GetSize: LongInt;
begin
if Valid then
Result := FPData.Size
else
Result := 0;
end;
function TBaseImage.GetBits: Pointer;
begin
if Valid then
Result := FPData.Bits
else
Result := nil;
end;
function TBaseImage.GetPalette: PPalette32;
begin
if Valid then
Result := FPData.Palette
else
Result := nil;
end;
function TBaseImage.GetPaletteEntries: LongInt;
begin
Result := GetFormatInfo.PaletteEntries;
end;
function TBaseImage.GetFormatInfo: TImageFormatInfo;
begin
if Valid then
Imaging.GetImageFormatInfo(FPData.Format, Result)
else
FillChar(Result, SizeOf(Result), 0);
end;
function TBaseImage.GetValid: Boolean;
begin
Result := Assigned(FPData) and Imaging.TestImage(FPData^);
end;
function TBaseImage.GetBoundsRect: TRect;
begin
Result := Rect(0, 0, GetWidth, GetHeight);
end;
procedure TBaseImage.SetWidth(const Value: LongInt);
begin
Resize(Value, GetHeight, rfNearest);
end;
procedure TBaseImage.SetHeight(const Value: LongInt);
begin
Resize(GetWidth, Value, rfNearest);
end;
procedure TBaseImage.SetFormat(const Value: TImageFormat);
begin
if Valid and Imaging.ConvertImage(FPData^, Value) then
DoDataSizeChanged;
end;
procedure TBaseImage.DoDataSizeChanged;
begin
if Assigned(FOnDataSizeChanged) then
FOnDataSizeChanged(Self);
DoPixelsChanged;
end;
procedure TBaseImage.DoPixelsChanged;
begin
if Assigned(FOnPixelsChanged) then
FOnPixelsChanged(Self);
end;
procedure TBaseImage.RecreateImageData(AWidth, AHeight: LongInt; AFormat: TImageFormat);
begin
if Assigned(FPData) and Imaging.NewImage(AWidth, AHeight, AFormat, FPData^) then
DoDataSizeChanged;
end;
procedure TBaseImage.Resize(NewWidth, NewHeight: LongInt; Filter: TResizeFilter);
begin
if Valid and Imaging.ResizeImage(FPData^, NewWidth, NewHeight, Filter) then
DoDataSizeChanged;
end;
procedure TBaseImage.Flip;
begin
if Valid and Imaging.FlipImage(FPData^) then
DoPixelsChanged;
end;
procedure TBaseImage.Mirror;
begin
if Valid and Imaging.MirrorImage(FPData^) then
DoPixelsChanged;
end;
procedure TBaseImage.Rotate(Angle: Single);
begin
if Valid and Imaging.RotateImage(FPData^, Angle) then
DoPixelsChanged;
end;
procedure TBaseImage.CopyTo(SrcX, SrcY, Width, Height: LongInt;
DstImage: TBaseImage; DstX, DstY: LongInt);
begin
if Valid and Assigned(DstImage) and DstImage.Valid then
begin
Imaging.CopyRect(FPData^, SrcX, SrcY, Width, Height, DstImage.FPData^, DstX, DstY);
DstImage.DoPixelsChanged;
end;
end;
procedure TBaseImage.StretchTo(SrcX, SrcY, SrcWidth, SrcHeight: LongInt;
DstImage: TBaseImage; DstX, DstY, DstWidth, DstHeight: LongInt; Filter: TResizeFilter);
begin
if Valid and Assigned(DstImage) and DstImage.Valid then
begin
Imaging.StretchRect(FPData^, SrcX, SrcY, SrcWidth, SrcHeight,
DstImage.FPData^, DstX, DstY, DstWidth, DstHeight, Filter);
DstImage.DoPixelsChanged;
end;
end;
procedure TBaseImage.ReplaceColor(X, Y, Width, Height: Integer; OldColor,
NewColor: Pointer);
begin
if Valid then
begin
Imaging.ReplaceColor(FPData^, X, Y, Width, Height, OldColor, NewColor);
DoPixelsChanged;
end;
end;
procedure TBaseImage.SwapChannels(SrcChannel, DstChannel: Integer);
begin
if Valid then
begin
Imaging.SwapChannels(FPData^, SrcChannel, DstChannel);
DoPixelsChanged;
end;
end;
function TBaseImage.ToString: string;
begin
Result := Iff(Valid, Imaging.ImageToStr(FPData^), 'empty image');
end;
procedure TBaseImage.LoadFromFile(const FileName: string);
begin
if Assigned(FPData) and Imaging.LoadImageFromFile(FileName, FPData^) then
DoDataSizeChanged;
end;
procedure TBaseImage.LoadFromStream(Stream: TStream);
begin
if Assigned(FPData) and Imaging.LoadImageFromStream(Stream, FPData^) then
DoDataSizeChanged;
end;
procedure TBaseImage.SaveToFile(const FileName: string);
begin
if Valid then
Imaging.SaveImageToFile(FileName, FPData^);
end;
procedure TBaseImage.SaveToStream(const Ext: string; Stream: TStream);
begin
if Valid then
Imaging.SaveImageToStream(Ext, Stream, FPData^);
end;
{ TSingleImage class implementation }
constructor TSingleImage.Create;
begin
inherited Create;
RecreateImageData(DefaultWidth, DefaultHeight, ifDefault);
end;
constructor TSingleImage.CreateFromParams(AWidth, AHeight: LongInt; AFormat: TImageFormat);
begin
inherited Create;
RecreateImageData(AWidth, AHeight, AFormat);
end;
constructor TSingleImage.CreateFromData(const AData: TImageData);
begin
inherited Create;
if Imaging.TestImage(AData) then
begin
Imaging.CloneImage(AData, FImageData);
DoDataSizeChanged;
end
else
Create;
end;
constructor TSingleImage.CreateFromFile(const FileName: string);
begin
inherited Create;
LoadFromFile(FileName);
end;
constructor TSingleImage.CreateFromStream(Stream: TStream);
begin
inherited Create;
LoadFromStream(Stream);
end;
destructor TSingleImage.Destroy;
begin
Imaging.FreeImage(FImageData);
inherited Destroy;
end;
procedure TSingleImage.SetPointer;
begin
FPData := @FImageData;
end;
procedure TSingleImage.Assign(Source: TPersistent);
begin
if Source = nil then
begin
Create;
end
else if Source is TSingleImage then
begin
CreateFromData(TSingleImage(Source).FImageData);
end
else if Source is TMultiImage then
begin
if TMultiImage(Source).Valid then
CreateFromData(TMultiImage(Source).FPData^)
else
Assign(nil);
end
else
inherited Assign(Source);
end;
{ TMultiImage class implementation }
constructor TMultiImage.Create;
begin
SetImageCount(DefaultImages);
SetActiveImage(0);
end;
constructor TMultiImage.CreateFromParams(AWidth, AHeight: LongInt;
AFormat: TImageFormat; Images: LongInt);
var
I: LongInt;
begin
Imaging.FreeImagesInArray(FDataArray);
SetLength(FDataArray, Images);
for I := 0 to GetImageCount - 1 do
Imaging.NewImage(AWidth, AHeight, AFormat, FDataArray[I]);
SetActiveImage(0);
end;
constructor TMultiImage.CreateFromArray(ADataArray: TDynImageDataArray);
var
I: LongInt;
begin
Imaging.FreeImagesInArray(FDataArray);
SetLength(FDataArray, Length(ADataArray));
for I := 0 to GetImageCount - 1 do
begin
// Clone only valid images
if Imaging.TestImage(ADataArray[I]) then
Imaging.CloneImage(ADataArray[I], FDataArray[I])
else
Imaging.NewImage(DefaultWidth, DefaultHeight, ifDefault, FDataArray[I]);
end;
SetActiveImage(0);
end;
constructor TMultiImage.CreateFromFile(const FileName: string);
begin
LoadMultiFromFile(FileName);
end;
constructor TMultiImage.CreateFromStream(Stream: TStream);
begin
LoadMultiFromStream(Stream);
end;
destructor TMultiImage.Destroy;
begin
Imaging.FreeImagesInArray(FDataArray);
inherited Destroy;
end;
procedure TMultiImage.SetActiveImage(Value: LongInt);
begin
FActiveImage := Value;
SetPointer;
end;
function TMultiImage.GetImageCount: LongInt;
begin
Result := Length(FDataArray);
end;
procedure TMultiImage.SetImageCount(Value: LongInt);
var
I, OldCount: LongInt;
begin
if Value > GetImageCount then
begin
// Create new empty images if array will be enlarged
OldCount := GetImageCount;
SetLength(FDataArray, Value);
for I := OldCount to Value - 1 do
Imaging.NewImage(DefaultWidth, DefaultHeight, ifDefault, FDataArray[I]);
end
else
begin
// Free images that exceed desired count and shrink array
for I := Value to GetImageCount - 1 do
Imaging.FreeImage(FDataArray[I]);
SetLength(FDataArray, Value);
end;
SetPointer;
end;
function TMultiImage.GetAllImagesValid: Boolean;
begin
Result := (GetImageCount > 0) and TestImagesInArray(FDataArray);
end;
function TMultiImage.GetImage(Index: LongInt): TImageData;
begin
if (Index >= 0) and (Index < GetImageCount) then
Result := FDataArray[Index];
end;
procedure TMultiImage.SetImage(Index: LongInt; Value: TImageData);
begin
if (Index >= 0) and (Index < GetImageCount) then
Imaging.CloneImage(Value, FDataArray[Index]);
end;
procedure TMultiImage.SetPointer;
begin
if GetImageCount > 0 then
begin
FActiveImage := ClampInt(FActiveImage, 0, GetImageCount - 1);
FPData := @FDataArray[FActiveImage];
end
else
begin
FActiveImage := -1;
FPData := nil
end;
end;
function TMultiImage.PrepareInsert(Index, Count: LongInt): Boolean;
var
I: LongInt;
begin
// Inserting to empty image will add image at index 0
if GetImageCount = 0 then
Index := 0;
if (Index >= 0) and (Index <= GetImageCount) and (Count > 0) then
begin
SetLength(FDataArray, GetImageCount + Count);
if Index < GetImageCount - 1 then
begin
// Move imges to new position
System.Move(FDataArray[Index], FDataArray[Index + Count],
(GetImageCount - Count - Index) * SizeOf(TImageData));
// Null old images, not free them!
for I := Index to Index + Count - 1 do
InitImage(FDataArray[I]);
end;
Result := True;
end
else
Result := False;
end;
procedure TMultiImage.DoInsertImages(Index: LongInt; const Images: TDynImageDataArray);
var
I, Len: LongInt;
begin
Len := Length(Images);
if PrepareInsert(Index, Len) then
begin
for I := 0 to Len - 1 do
Imaging.CloneImage(Images[I], FDataArray[Index + I]);
end;
end;
procedure TMultiImage.DoInsertNew(Index, AWidth, AHeight: LongInt;
AFormat: TImageFormat);
begin
if PrepareInsert(Index, 1) then
Imaging.NewImage(AWidth, AHeight, AFormat, FDataArray[Index]);
end;
procedure TMultiImage.Assign(Source: TPersistent);
var
Arr: TDynImageDataArray;
begin
if Source = nil then
begin
Create;
end
else if Source is TMultiImage then
begin
CreateFromArray(TMultiImage(Source).FDataArray);
SetActiveImage(TMultiImage(Source).ActiveImage);
end
else if Source is TSingleImage then
begin
SetLength(Arr, 1);
Arr[0] := TSingleImage(Source).FImageData;
CreateFromArray(Arr);
Arr := nil;
end
else
inherited Assign(Source);
end;
procedure TMultiImage.AddImage(AWidth, AHeight: LongInt; AFormat: TImageFormat);
begin
DoInsertNew(GetImageCount, AWidth, AHeight, AFormat);
end;
procedure TMultiImage.AddImage(const Image: TImageData);
begin
DoInsertImages(GetImageCount, GetArrayFromImageData(Image));
end;
procedure TMultiImage.AddImage(Image: TBaseImage);
begin
if Assigned(Image) and Image.Valid then
DoInsertImages(GetImageCount, GetArrayFromImageData(Image.FPData^));
end;
procedure TMultiImage.AddImages(const Images: TDynImageDataArray);
begin
DoInsertImages(GetImageCount, Images);
end;
procedure TMultiImage.AddImages(Images: TMultiImage);
begin
DoInsertImages(GetImageCount, Images.FDataArray);
end;
procedure TMultiImage.InsertImage(Index, AWidth, AHeight: LongInt;
AFormat: TImageFormat);
begin
DoInsertNew(Index, AWidth, AHeight, AFormat);
end;
procedure TMultiImage.InsertImage(Index: LongInt; const Image: TImageData);
begin
DoInsertImages(Index, GetArrayFromImageData(Image));
end;
procedure TMultiImage.InsertImage(Index: LongInt; Image: TBaseImage);
begin
if Assigned(Image) and Image.Valid then
DoInsertImages(Index, GetArrayFromImageData(Image.FPData^));
end;
procedure TMultiImage.InsertImages(Index: LongInt;
const Images: TDynImageDataArray);
begin
DoInsertImages(Index, FDataArray);
end;
procedure TMultiImage.InsertImages(Index: LongInt; Images: TMultiImage);
begin
DoInsertImages(Index, Images.FDataArray);
end;
procedure TMultiImage.ExchangeImages(Index1, Index2: LongInt);
var
TempData: TImageData;
begin
if (Index1 >= 0) and (Index1 < GetImageCount) and
(Index2 >= 0) and (Index2 < GetImageCount) then
begin
TempData := FDataArray[Index1];
FDataArray[Index1] := FDataArray[Index2];
FDataArray[Index2] := TempData;
end;
end;
procedure TMultiImage.DeleteImage(Index: LongInt);
var
I: LongInt;
begin
if (Index >= 0) and (Index < GetImageCount) then
begin
// Free image at index to be deleted
Imaging.FreeImage(FDataArray[Index]);
if Index < GetImageCount - 1 then
begin
// Move images to new indices if necessary
for I := Index to GetImageCount - 2 do
FDataArray[I] := FDataArray[I + 1];
end;
// Set new array length and update pointer to active image
SetLength(FDataArray, GetImageCount - 1);
SetPointer;
end;
end;
procedure TMultiImage.ConvertImages(Format: TImageFormat);
var
I: LongInt;
begin
for I := 0 to GetImageCount - 1 do
Imaging.ConvertImage(FDataArray[I], Format);
end;
procedure TMultiImage.ResizeImages(NewWidth, NewHeight: LongInt;
Filter: TResizeFilter);
var
I: LongInt;
begin
for I := 0 to GetImageCount do
Imaging.ResizeImage(FDataArray[I], NewWidth, NewHeight, Filter);
end;
procedure TMultiImage.ReverseImages;
var
I: Integer;
begin
for I := 0 to GetImageCount div 2 do
ExchangeImages(I, GetImageCount - 1 - I);
end;
procedure TMultiImage.LoadFromFile(const FileName: string);
begin
if GetImageCount = 0 then
ImageCount := 1;
inherited LoadFromFile(FileName);
end;
procedure TMultiImage.LoadFromStream(Stream: TStream);
begin
if GetImageCount = 0 then
ImageCount := 1;
inherited LoadFromStream(Stream);
end;
procedure TMultiImage.LoadMultiFromFile(const FileName: string);
begin
Imaging.LoadMultiImageFromFile(FileName, FDataArray);
SetActiveImage(0);
end;
procedure TMultiImage.LoadMultiFromStream(Stream: TStream);
begin
Imaging.LoadMultiImageFromStream(Stream, FDataArray);
SetActiveImage(0);
end;
procedure TMultiImage.SaveMultiToFile(const FileName: string);
begin
Imaging.SaveMultiImageToFile(FileName, FDataArray);
end;
procedure TMultiImage.SaveMultiToStream(const Ext: string; Stream: TStream);
begin
Imaging.SaveMultiImageToStream(Ext, Stream, FDataArray);
end;
{
File Notes:
-- TODOS ----------------------------------------------------
- nothing now
- add SetPalette, create some pal wrapper first
- put all low level stuff here like ReplaceColor etc, change
CopyTo to Copy, and add overload Copy(SrcRect, DstX, DstY) ...
-- 0.24.3 Changes/Bug Fixes ---------------------------------
- Added TMultiImage.ReverseImages method.
-- 0.23 Changes/Bug Fixes -----------------------------------
- Added SwapChannels method to TBaseImage.
- Added ReplaceColor method to TBaseImage.
- Added ToString method to TBaseImage.
-- 0.21 Changes/Bug Fixes -----------------------------------
- Inserting images to empty MultiImage will act as Add method.
- MultiImages with empty arrays will now create one image when
LoadFromFile or LoadFromStream is called.
- Fixed bug that caused AVs when getting props like Width, Height, asn Size
and when inlining was off. There was call to Iff but with inlining disabled
params like FPData.Size were evaluated and when FPData was nil => AV.
- Added many FPData validity checks to many methods. There were AVs
when calling most methods on empty TMultiImage.
- Added AllImagesValid property to TMultiImage.
- Fixed memory leak in TMultiImage.CreateFromParams.
-- 0.19 Changes/Bug Fixes -----------------------------------
- added ResizeImages method to TMultiImage
- removed Ext parameter from various LoadFromStream methods, no
longer needed
- fixed various issues concerning ActiveImage of TMultiImage
(it pointed to invalid location after some operations)
- most of property set/get methods are now inline
- added PixelPointers property to TBaseImage
- added Images default array property to TMultiImage
- renamed methods in TMultiImage to contain 'Image' instead of 'Level'
- added canvas support
- added OnDataSizeChanged and OnPixelsChanged event to TBaseImage
- renamed TSingleImage.NewImage to RecreateImageData, made public, and
moved to TBaseImage
-- 0.17 Changes/Bug Fixes -----------------------------------
- added props PaletteEntries and ScanLine to TBaseImage
- aded new constructor to TBaseImage that take TBaseImage source
- TMultiImage levels adding and inserting rewritten internally
- added some new functions to TMultiImage: AddLevels, InsertLevels
- added some new functions to TBaseImage: Flip, Mirror, Rotate,
CopyRect, StretchRect
- TBasicImage.Resize has now filter parameter
- new stuff added to TMultiImage (DataArray prop, ConvertLevels)
-- 0.13 Changes/Bug Fixes -----------------------------------
- added AddLevel, InsertLevel, ExchangeLevels and DeleteLevel
methods to TMultiImage
- added TBaseImage, TSingleImage and TMultiImage with initial
members
}
end.
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