324 lines
11 KiB
Plaintext
324 lines
11 KiB
Plaintext
(*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* http://www.opensource.org/licenses/cddl1.php.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* http://www.opensource.org/licenses/cddl1.php. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying * information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Portions Copyright 2007 Andreas Schneider
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*)
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unit UArt;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, Imaging, ImagingTypes, ImagingCanvases, ImagingClasses,
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UMulBlock, UGenericIndex, UHue;
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type
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TArtType = (atLand, atStatic, atLandFlat);
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TArt = class(TMulBlock)
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constructor Create(AData: TStream; AIndex: TGenericIndex; AArtType: TArtType); overload;
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constructor Create(AData: TStream; AIndex: TGenericIndex; AArtType: TArtType; AHue: THue; APartialHue: Boolean); overload;
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constructor Create(AData: TStream; AIndex: TGenericIndex; AArtType: TArtType; AArtColor: Word; AHue: THue; APartialHue: Boolean); overload;
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destructor Destroy; override;
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function Clone: TArt; override;
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function GetSize: Integer; override;
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procedure Write(AData: TStream); override;
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procedure RefreshBuffer;
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protected
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FArtType: TArtType;
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FHeader: LongInt;
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FGraphic: TSingleImage;
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FBuffer: TStream;
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public
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property ArtType: TArtType read FArtType write FArtType;
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property Header: LongInt read FHeader write FHeader;
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property Graphic: TSingleImage read FGraphic;
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property Buffer: TStream read FBuffer;
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end;
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implementation
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type
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PWordArray = ^TWordArray;
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TWordArray = array[0..16383] of Word;
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constructor TArt.Create(AData: TStream; AIndex: TGenericIndex; AArtType: TArtType);
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begin
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Create(AData, AIndex, AArtType, 0, nil, False);
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end;
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constructor TArt.Create(AData: TStream; AIndex: TGenericIndex; AArtType: TArtType; AHue: THue; APartialHue: Boolean);
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begin
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Create(AData, AIndex, AArtType, 0, AHue, APartialHue);
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end;
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constructor TArt.Create(AData: TStream; AIndex: TGenericIndex; AArtType: TArtType; AArtColor: Word; AHue: THue; APartialHue: Boolean);
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var
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i, x, y, start: Integer;
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iCurrentHeight, iCurrentWidth: Integer;
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width, height: SmallInt;
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lookup: array of integer;
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color, run, offset: Word;
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block: TMemoryStream;
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P: PWordArray;
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r, g, b: Byte;
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begin
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FBuffer := TMemoryStream.Create;
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FArtType := AArtType;
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AArtColor := AArtColor or $8000; //set alpha bit on background
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if Assigned(AData) and (AIndex.Lookup <> LongInt($FFFFFFFF)) then
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begin
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AData.Position := AIndex.Lookup;
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block := TMemoryStream.Create;
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block.CopyFrom(AData, AIndex.Size);
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block.Position := 0;
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if AArtType = atLand then
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begin
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FGraphic:= TSingleImage.CreateFromParams(44, 44, ifA1R5G5B5);
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FillWord(FGraphic.Bits^, 44 * 44, AArtColor);
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for y := 0 to 21 do
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begin
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P := FGraphic.Bits + y * 44 * 2;
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block.Read(P^[22 - (y + 1)], (y + 1) * 4);
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end;
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for y := 0 to 21 do
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begin
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P := FGraphic.Bits + (22 + y) * 44 * 2;
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block.Read(P^[y], (22 - y) * 4);
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end;
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for i := 0 to 44 * 44 - 1 do
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PWordArray(FGraphic.Bits)^[i] := PWordArray(FGraphic.Bits)^[i] xor $8000; //invert alpha bit
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end else if AArtType = atLandFlat then
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begin
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FGraphic:= TSingleImage.CreateFromParams(44, 44, ifA1R5G5B5);
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for i := 1 to 22 do
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begin
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for x := 0 to i * 2 - 1 do
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begin
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y := i * 2 - x - 1;
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block.Read(color, SizeOf(Word));
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PWordArray(FGraphic.Bits + y * 44 * 2)^[x] := color;
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if y > 0 then
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PWordArray(FGraphic.Bits + (y - 1) * 44 * 2)^[x] := color;
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end;
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end;
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for i := 22 to 43 do
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begin
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for y := 0 to (44 - i) * 2 - 1 do
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begin
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x := 42 - (43 - i) * 2 + y;
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block.Read(color, SizeOf(Word));
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PWordArray(FGraphic.Bits + (43 - y) * 44 * 2)^[x] := color;
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if y > 0 then
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PWordArray(FGraphic.Bits + (44 - y) * 44 * 2)^[x] := color;
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end;
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end;
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for i := 0 to 44 * 44 - 1 do
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PWordArray(FGraphic.Bits)^[i] := PWordArray(FGraphic.Bits)^[i] xor $8000; //invert alpha bit
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end else if AArtType = atStatic then
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begin
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block.Read(FHeader, SizeOf(LongInt));
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block.Read(width, SizeOf(SmallInt));
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block.Read(height, SizeOf(SmallInt));
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FGraphic:= TSingleImage.CreateFromParams(width, height, ifA1R5G5B5);
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FillWord(FGraphic.Bits^, width * height, AArtColor);
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SetLength(lookup, height);
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start := block.Position + (height * 2);
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for i := 0 to height - 1 do
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begin
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block.Read(offset, SizeOf(Word));
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lookup[i] := start + (offset * 2);
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end;
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for iCurrentHeight := 0 to height - 1 do
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begin
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block.Position := lookup[iCurrentHeight];
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iCurrentWidth := 0;
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P := FGraphic.Bits + iCurrentHeight * width * 2;
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while (block.Read(offset, SizeOf(Word)) = SizeOf(Word)) and (block.Read(run, SizeOf(Word)) = SizeOf(Word)) and (offset + run <> 0) do
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begin
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inc(iCurrentWidth, offset);
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for i := 0 to run - 1 do
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begin
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block.Read(color, SizeOf(Word));
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P^[iCurrentWidth + i] := color;
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end;
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inc(iCurrentWidth, run);
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end;
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end;
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if AHue <> nil then
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begin
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for i := 0 to width * height - 1 do
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begin
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color := PWordArray(FGraphic.Bits)^[i];
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if color <> AArtColor then
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begin
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r := (color and $7C00) shr 10;
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if APartialHue then
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begin
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g := (color and $3E0) shr 5;
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b := color and $1F;
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if (r = g) and (g = b) then
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color := AHue.ColorTable[r];
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end else
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color := AHue.ColorTable[r];
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end;
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PWordArray(FGraphic.Bits)^[i] := color;
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end;
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end;
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for i := 0 to width * height - 1 do
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PWordArray(FGraphic.Bits)^[i] := PWordArray(FGraphic.Bits)^[i] xor $8000; //invert alpha bit
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end else
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FGraphic:= TSingleImage.Create;
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if Assigned(block) then block.Free;
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end else
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begin
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FHeader := 1;
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FGraphic := TSingleImage.Create;
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end;
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FGraphic.Format := ifA8R8G8B8;
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end;
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destructor TArt.Destroy;
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begin
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if assigned(FGraphic) then FGraphic.Free;
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if assigned(FBuffer) then FBuffer.Free;
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inherited;
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end;
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function TArt.Clone: TArt;
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begin
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Result := TArt.Create(nil, nil, FArtType);
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Result.FHeader := FHeader;
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Result.FGraphic.Assign(FGraphic);
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end;
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procedure TArt.Write(AData: TStream);
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begin
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FBuffer.Position := 0;
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AData.CopyFrom(FBuffer, FBuffer.Size);
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end;
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function TArt.GetSize: Integer;
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begin
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RefreshBuffer;
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Result := FBuffer.Size
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end;
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procedure TArt.RefreshBuffer;
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var
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argbGraphic: TSingleImage;
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i, j, x, y, lineWidth, start: Integer;
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iCurrentHeight, iCurrentWidth: Integer;
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width, height: SmallInt;
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color, run, offset: Word;
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lookup: array of SmallInt;
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begin
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argbGraphic := TSingleImage.CreateFromImage(FGraphic);
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argbGraphic.Format := ifA1R5G5B5;
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for i := 0 to argbGraphic.Width * argbGraphic.Height - 1 do
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PWordArray(argbGraphic.Bits)^[i] := PWordArray(argbGraphic.Bits)^[i] xor $8000; //invert alpha bit
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FBuffer.Size := 0;
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if FArtType = atLand then
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begin
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if (argbGraphic.Height <> 44) or (argbGraphic.Width <> 44) then Exit;
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x := 21;
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y := 0;
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lineWidth := 2;
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for i := 1 to 22 do
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begin
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Dec(x);
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FBuffer.Write(PWordArray(argbGraphic.Bits + y * 44 * 2)^[x + j], lineWidth);
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Inc(y);
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Inc(lineWidth, 2);
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end;
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for i := 1 to 22 do
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begin
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Dec(lineWidth, 2);
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FBuffer.Write(PWordArray(argbGraphic.Bits + y * 44 * 2)^[x + j], lineWidth);
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Inc(x);
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Inc(y);
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end;
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end else if FArtType = atStatic then
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begin
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if (argbGraphic.Height = 0) or (argbGraphic.Width = 0) then Exit;
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width := argbGraphic.Width;
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height := argbGraphic.Height;
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FBuffer.Write(FHeader, SizeOf(LongInt));
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FBuffer.Write(width, SizeOf(SmallInt));
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FBuffer.Write(height, SizeOf(SmallInt));
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SetLength(lookup, height);
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for i := 0 to height - 1 do
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FBuffer.Write(lookup[i], SizeOf(SmallInt)); //placeholders for the lookup table
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start := FBuffer.Position;
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for iCurrentHeight := 0 to height - 1 do
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begin
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lookup[iCurrentHeight] := SmallInt((FBuffer.Position - start) div 2); //remember the lookup offset for the current line
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offset := 0;
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run := 0;
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for iCurrentWidth := 0 to width - 1 do //process every pixel on the current line
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begin
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color := PWordArray(FGraphic.Bits + iCurrentHeight * width * 2)^[iCurrentWidth];
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if (color and $8000 = 0) and (run = 0) then //new visible pixel found
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begin
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FBuffer.Write(offset, SizeOf(Word));
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FBuffer.Write(offset, SizeOf(Word)); //just a placeholder for the "run length"
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run := 1;
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FBuffer.Write(color, SizeOf(Word));
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end else if (color and $8000 = 0) and (run > 0) then //another visible pixel found
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begin
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inc(run);
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FBuffer.Write(color, SizeOf(Word));
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end else if (color and $8000 = $8000) and (run > 0) then //after some visible pixels this one is invisible, so stop the current run
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begin
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FBuffer.Seek(Integer(-((run + 1) * 2)), soFromCurrent); //jump back ...
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FBuffer.Write(run, SizeOf(Word)); //... to write the actual "run length" ...
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FBuffer.Seek(Integer(run * 2), soFromCurrent); //... and jump forth again to proceed
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run := 0;
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offset := 1;
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end else
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inc(offset);
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end;
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if run > 0 then //no more pixels but the "run" didn't end yet ;-)
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begin
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FBuffer.Seek(Integer(-((run + 1) * 2)), soFromCurrent);
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FBuffer.Write(run, SizeOf(Word));
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FBuffer.Seek(Integer(run * 2), soFromCurrent);
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run := 0;
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end;
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FBuffer.Write(run, SizeOf(Word)); //just write "0"
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FBuffer.Write(run, SizeOf(Word)); //... two times, to indicate the end of that line
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end;
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FBuffer.Position := start - (height * 2); //now update the lookup table with our new values
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for i := 0 to height - 1 do
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FBuffer.Write(lookup[i], SizeOf(SmallInt));
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end;
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argbGraphic.Free;
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end;
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end.
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