CentrED/UOLib/UArt.pas

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(*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at
* http://www.opensource.org/licenses/cddl1.php.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at
* http://www.opensource.org/licenses/cddl1.php. If applicable,
* add the following below this CDDL HEADER, with the fields enclosed
* by brackets "[]" replaced with your own identifying * information:
* Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
*
* Portions Copyright 2009 Andreas Schneider
*)
unit UArt;
{$mode objfpc}{$H+}
interface
uses
Classes, Imaging, ImagingTypes, ImagingCanvases, ImagingClasses,
UMulBlock, UGenericIndex, UHue;
type
TArtType = (atLand, atStatic, atLandFlat);
TArt = class(TMulBlock)
constructor Create(AData: TStream; AIndex: TGenericIndex; AArtType: TArtType); overload;
constructor Create(AData: TStream; AIndex: TGenericIndex; AArtType: TArtType; AHue: THue; APartialHue: Boolean); overload;
constructor Create(AData: TStream; AIndex: TGenericIndex; AArtType: TArtType; AArtColor: Word; AHue: THue; APartialHue: Boolean); overload;
destructor Destroy; override;
function Clone: TArt; override;
function GetSize: Integer; override;
procedure Write(AData: TStream); override;
procedure RefreshBuffer;
protected
FArtType: TArtType;
FHeader: LongInt;
FGraphic: TSingleImage;
FBuffer: TStream;
public
property ArtType: TArtType read FArtType write FArtType;
property Header: LongInt read FHeader write FHeader;
property Graphic: TSingleImage read FGraphic;
property Buffer: TStream read FBuffer;
end;
implementation
type
PWordArray = ^TWordArray;
TWordArray = array[0..16383] of Word;
constructor TArt.Create(AData: TStream; AIndex: TGenericIndex; AArtType: TArtType);
begin
Create(AData, AIndex, AArtType, 0, nil, False);
end;
constructor TArt.Create(AData: TStream; AIndex: TGenericIndex; AArtType: TArtType; AHue: THue; APartialHue: Boolean);
begin
Create(AData, AIndex, AArtType, 0, AHue, APartialHue);
end;
constructor TArt.Create(AData: TStream; AIndex: TGenericIndex; AArtType: TArtType; AArtColor: Word; AHue: THue; APartialHue: Boolean);
var
i, x, y, start: Integer;
iCurrentHeight, iCurrentWidth: Integer;
width, height: SmallInt;
lookup: array of integer;
color, run, offset: Word;
block: TMemoryStream;
P: PWordArray;
r, g, b: Byte;
begin
FBuffer := TMemoryStream.Create;
FArtType := AArtType;
AArtColor := AArtColor or $8000; //set alpha bit on background
if Assigned(AData) and (AIndex.Lookup > -1) then
begin
AData.Position := AIndex.Lookup;
block := TMemoryStream.Create;
block.CopyFrom(AData, AIndex.Size);
block.Position := 0;
if AArtType = atLand then
begin
FGraphic:= TSingleImage.CreateFromParams(44, 44, ifA1R5G5B5);
FillWord(FGraphic.Bits^, 44 * 44, AArtColor);
for y := 0 to 21 do
begin
P := FGraphic.Bits + y * 44 * 2;
block.Read(P^[22 - (y + 1)], (y + 1) * 4);
end;
for y := 0 to 21 do
begin
P := FGraphic.Bits + (22 + y) * 44 * 2;
block.Read(P^[y], (22 - y) * 4);
end;
for i := 0 to 44 * 44 - 1 do
PWordArray(FGraphic.Bits)^[i] := PWordArray(FGraphic.Bits)^[i] xor $8000; //invert alpha bit
end else if AArtType = atLandFlat then
begin
FGraphic:= TSingleImage.CreateFromParams(44, 44, ifA1R5G5B5);
for i := 1 to 22 do
begin
for x := 0 to i * 2 - 1 do
begin
y := i * 2 - x - 1;
block.Read(color, SizeOf(Word));
PWordArray(FGraphic.Bits + y * 44 * 2)^[x] := color;
if y > 0 then
PWordArray(FGraphic.Bits + (y - 1) * 44 * 2)^[x] := color;
end;
end;
for i := 22 to 43 do
begin
for y := 0 to (44 - i) * 2 - 1 do
begin
x := 42 - (43 - i) * 2 + y;
block.Read(color, SizeOf(Word));
PWordArray(FGraphic.Bits + (43 - y) * 44 * 2)^[x] := color;
if y > 0 then
PWordArray(FGraphic.Bits + (44 - y) * 44 * 2)^[x] := color;
end;
end;
for i := 0 to 44 * 44 - 1 do
PWordArray(FGraphic.Bits)^[i] := PWordArray(FGraphic.Bits)^[i] xor $8000; //invert alpha bit
end else if AArtType = atStatic then
begin
block.Read(FHeader, SizeOf(LongInt));
block.Read(width, SizeOf(SmallInt));
block.Read(height, SizeOf(SmallInt));
FGraphic:= TSingleImage.CreateFromParams(width, height, ifA1R5G5B5);
FillWord(FGraphic.Bits^, width * height, AArtColor);
SetLength(lookup, height);
start := block.Position + (height * 2);
for i := 0 to height - 1 do
begin
block.Read(offset, SizeOf(Word));
lookup[i] := start + (offset * 2);
end;
for iCurrentHeight := 0 to height - 1 do
begin
block.Position := lookup[iCurrentHeight];
iCurrentWidth := 0;
P := FGraphic.Bits + iCurrentHeight * width * 2;
while (block.Read(offset, SizeOf(Word)) = SizeOf(Word)) and (block.Read(run, SizeOf(Word)) = SizeOf(Word)) and (offset + run <> 0) do
begin
inc(iCurrentWidth, offset);
for i := 0 to run - 1 do
begin
block.Read(color, SizeOf(Word));
P^[iCurrentWidth + i] := color;
end;
inc(iCurrentWidth, run);
end;
end;
if AHue <> nil then
begin
for i := 0 to width * height - 1 do
begin
color := PWordArray(FGraphic.Bits)^[i];
if color <> AArtColor then
begin
r := (color and $7C00) shr 10;
if APartialHue then
begin
g := (color and $3E0) shr 5;
b := color and $1F;
if (r = g) and (g = b) then
color := AHue.ColorTable[r];
end else
color := AHue.ColorTable[r];
end;
PWordArray(FGraphic.Bits)^[i] := color;
end;
end;
for i := 0 to width * height - 1 do
PWordArray(FGraphic.Bits)^[i] := PWordArray(FGraphic.Bits)^[i] xor $8000; //invert alpha bit
end else
FGraphic:= TSingleImage.Create;
if Assigned(block) then block.Free;
end else
begin
FHeader := 1;
FGraphic := TSingleImage.Create;
end;
FGraphic.Format := ifA8R8G8B8;
end;
destructor TArt.Destroy;
begin
if assigned(FGraphic) then FGraphic.Free;
if assigned(FBuffer) then FBuffer.Free;
inherited;
end;
function TArt.Clone: TArt;
begin
Result := TArt.Create(nil, nil, FArtType);
Result.FHeader := FHeader;
Result.FGraphic.Assign(FGraphic);
end;
procedure TArt.Write(AData: TStream);
begin
FBuffer.Position := 0;
AData.CopyFrom(FBuffer, FBuffer.Size);
end;
function TArt.GetSize: Integer;
begin
RefreshBuffer;
Result := FBuffer.Size
end;
procedure TArt.RefreshBuffer;
var
argbGraphic: TSingleImage;
i, j, x, y, lineWidth, start: Integer;
iCurrentHeight, iCurrentWidth: Integer;
width, height: SmallInt;
color, run, offset: Word;
lookup: array of SmallInt;
begin
argbGraphic := TSingleImage.CreateFromImage(FGraphic);
argbGraphic.Format := ifA1R5G5B5;
for i := 0 to argbGraphic.Width * argbGraphic.Height - 1 do
PWordArray(argbGraphic.Bits)^[i] := PWordArray(argbGraphic.Bits)^[i] xor $8000; //invert alpha bit
FBuffer.Size := 0;
if FArtType = atLand then
begin
if (argbGraphic.Height <> 44) or (argbGraphic.Width <> 44) then Exit;
x := 21;
y := 0;
lineWidth := 2;
for i := 1 to 22 do
begin
Dec(x);
FBuffer.Write(PWordArray(argbGraphic.Bits + y * 44 * 2)^[x + j], lineWidth);
Inc(y);
Inc(lineWidth, 2);
end;
for i := 1 to 22 do
begin
Dec(lineWidth, 2);
FBuffer.Write(PWordArray(argbGraphic.Bits + y * 44 * 2)^[x + j], lineWidth);
Inc(x);
Inc(y);
end;
end else if FArtType = atStatic then
begin
if (argbGraphic.Height = 0) or (argbGraphic.Width = 0) then Exit;
width := argbGraphic.Width;
height := argbGraphic.Height;
FBuffer.Write(FHeader, SizeOf(LongInt));
FBuffer.Write(width, SizeOf(SmallInt));
FBuffer.Write(height, SizeOf(SmallInt));
SetLength(lookup, height);
for i := 0 to height - 1 do
FBuffer.Write(lookup[i], SizeOf(SmallInt)); //placeholders for the lookup table
start := FBuffer.Position;
for iCurrentHeight := 0 to height - 1 do
begin
lookup[iCurrentHeight] := SmallInt((FBuffer.Position - start) div 2); //remember the lookup offset for the current line
offset := 0;
run := 0;
for iCurrentWidth := 0 to width - 1 do //process every pixel on the current line
begin
color := PWordArray(FGraphic.Bits + iCurrentHeight * width * 2)^[iCurrentWidth];
if (color and $8000 = 0) and (run = 0) then //new visible pixel found
begin
FBuffer.Write(offset, SizeOf(Word));
FBuffer.Write(offset, SizeOf(Word)); //just a placeholder for the "run length"
run := 1;
FBuffer.Write(color, SizeOf(Word));
end else if (color and $8000 = 0) and (run > 0) then //another visible pixel found
begin
inc(run);
FBuffer.Write(color, SizeOf(Word));
end else if (color and $8000 = $8000) and (run > 0) then //after some visible pixels this one is invisible, so stop the current run
begin
FBuffer.Seek(Integer(-((run + 1) * 2)), soFromCurrent); //jump back ...
FBuffer.Write(run, SizeOf(Word)); //... to write the actual "run length" ...
FBuffer.Seek(Integer(run * 2), soFromCurrent); //... and jump forth again to proceed
run := 0;
offset := 1;
end else
inc(offset);
end;
if run > 0 then //no more pixels but the "run" didn't end yet ;-)
begin
FBuffer.Seek(Integer(-((run + 1) * 2)), soFromCurrent);
FBuffer.Write(run, SizeOf(Word));
FBuffer.Seek(Integer(run * 2), soFromCurrent);
run := 0;
end;
FBuffer.Write(run, SizeOf(Word)); //just write "0"
FBuffer.Write(run, SizeOf(Word)); //... two times, to indicate the end of that line
end;
FBuffer.Position := start - (height * 2); //now update the lookup table with our new values
for i := 0 to height - 1 do
FBuffer.Write(lookup[i], SizeOf(SmallInt));
end;
argbGraphic.Free;
end;
end.