hedgewars/uLandGraphics.pas
author unc0rr
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Moving hedgehog could get another hedgehog moving forward
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(*
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 * Hedgewars, a worms-like game
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 * Copyright (c) 2005-2007 Andrey Korotaev <unC0Rr@gmail.com>
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; version 2 of the License
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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 *)
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unit uLandGraphics;
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interface
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uses uFloat, uConsts;
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{$INCLUDE options.inc}
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type PRangeArray = ^TRangeArray;
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     TRangeArray = array[0..31] of record
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                                   Left, Right: LongInt;
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                                   end;
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procedure DrawExplosion(X, Y, Radius: LongInt);
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procedure DrawHLinesExplosions(ar: PRangeArray; Radius: LongInt; y, dY: LongInt; Count: Byte);
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procedure DrawTunnel(X, Y, dX, dY: hwFloat; ticks, HalfWidth: LongInt);
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procedure FillRoundInLand(X, Y, Radius: LongInt; Value: Longword);
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procedure ChangeRoundInLand(X, Y, Radius: LongInt; doSet: boolean);
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function TryPlaceOnLand(cpX, cpY: LongInt; Obj: TSprite; Frame: LongInt): boolean;
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implementation
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uses SDLh, uMisc, uLand;
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procedure FillCircleLines(x, y, dx, dy: LongInt; Value: Longword);
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var i: LongInt;
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begin
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if ((y + dy) and $FFFFFC00) = 0 then
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   for i:= max(x - dx, 0) to min(x + dx, 2047) do Land[y + dy, i]:= Value;
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if ((y - dy) and $FFFFFC00) = 0 then
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   for i:= max(x - dx, 0) to min(x + dx, 2047) do Land[y - dy, i]:= Value;
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if ((y + dx) and $FFFFFC00) = 0 then
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   for i:= max(x - dy, 0) to min(x + dy, 2047) do Land[y + dx, i]:= Value;
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if ((y - dx) and $FFFFFC00) = 0 then
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   for i:= max(x - dy, 0) to min(x + dy, 2047) do Land[y - dx, i]:= Value;
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end;
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procedure ChangeCircleLines(x, y, dx, dy: LongInt; doSet: boolean);
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var i: LongInt;
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begin
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if not doSet then
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   begin
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   if ((y + dy) and $FFFFFC00) = 0 then
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      for i:= max(x - dx, 0) to min(x + dx, 2047) do
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          if (Land[y + dy, i] > 0) then dec(Land[y + dy, i]);
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   if ((y - dy) and $FFFFFC00) = 0 then
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      for i:= max(x - dx, 0) to min(x + dx, 2047) do
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          if (Land[y - dy, i] > 0) then dec(Land[y - dy, i]);
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   if ((y + dx) and $FFFFFC00) = 0 then
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      for i:= max(x - dy, 0) to min(x + dy, 2047) do
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          if (Land[y + dx, i] > 0) then dec(Land[y + dx, i]);
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   if ((y - dx) and $FFFFFC00) = 0 then
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      for i:= max(x - dy, 0) to min(x + dy, 2047) do
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          if (Land[y - dx, i] > 0) then dec(Land[y - dx, i]);
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   end else
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   begin
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   if ((y + dy) and $FFFFFC00) = 0 then
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      for i:= max(x - dx, 0) to min(x + dx, 2047) do inc(Land[y + dy, i]);
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   if ((y - dy) and $FFFFFC00) = 0 then
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      for i:= max(x - dx, 0) to min(x + dx, 2047) do inc(Land[y - dy, i]);
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   if ((y + dx) and $FFFFFC00) = 0 then
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      for i:= max(x - dy, 0) to min(x + dy, 2047) do inc(Land[y + dx, i]);
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   if ((y - dx) and $FFFFFC00) = 0 then
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      for i:= max(x - dy, 0) to min(x + dy, 2047) do inc(Land[y - dx, i]);
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   end
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end;
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procedure FillRoundInLand(X, Y, Radius: LongInt; Value: Longword);
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var dx, dy, d: LongInt;
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begin
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  dx:= 0;
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  dy:= Radius;
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  d:= 3 - 2 * Radius;
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  while (dx < dy) do
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     begin
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     FillCircleLines(x, y, dx, dy, Value);
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     if (d < 0)
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     then d:= d + 4 * dx + 6
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     else begin
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          d:= d + 4 * (dx - dy) + 10;
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          dec(dy)
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          end;
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     inc(dx)
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     end;
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  if (dx = dy) then FillCircleLines(x, y, dx, dy, Value);
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end;
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procedure ChangeRoundInLand(X, Y, Radius: LongInt; doSet: boolean);
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var dx, dy, d: LongInt;
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begin
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  dx:= 0;
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  dy:= Radius;
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  d:= 3 - 2 * Radius;
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  while (dx < dy) do
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     begin
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     ChangeCircleLines(x, y, dx, dy, doSet);
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     if (d < 0)
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     then d:= d + 4 * dx + 6
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     else begin
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          d:= d + 4 * (dx - dy) + 10;
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          dec(dy)
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          end;
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     inc(dx)
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     end;
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  if (dx = dy) then ChangeCircleLines(x, y, dx, dy, doSet)
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end;
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procedure ClearLandPixel(y, x: LongInt);
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var p: PByteArray;
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begin
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p:= @PByteArray(LandSurface^.pixels)^[LandSurface^.pitch * y];
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case LandSurface^.format^.BytesPerPixel of
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     2: PWord(@(p^[x * 2]))^:= 0;
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     3: begin
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        p^[x * 3 + 0]:= 0;
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        p^[x * 3 + 1]:= 0;
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        p^[x * 3 + 2]:= 0;
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        end;
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     4: PLongword(@(p^[x * 4]))^:= 0;
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     end
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end;
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procedure SetLandPixel(y, x: LongInt);
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var p: PByteArray;
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begin
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p:= @PByteArray(LandSurface^.pixels)^[LandSurface^.pitch * y];
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case LandSurface^.format^.BytesPerPixel of
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     2: PWord(@(p^[x * 2]))^:= cExplosionBorderColor;
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     3: begin
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        p^[x * 3 + 0]:= cExplosionBorderColor and $FF;
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        p^[x * 3 + 1]:= (cExplosionBorderColor shr 8) and $FF;
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        p^[x * 3 + 2]:= cExplosionBorderColor shr 16;
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        end;
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     4: PLongword(@(p^[x * 4]))^:= cExplosionBorderColor;
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     end
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end;
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procedure FillLandCircleLines0(x, y, dx, dy: LongInt);
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var i: LongInt;
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begin
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if ((y + dy) and $FFFFFC00) = 0 then
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   for i:= max(x - dx, 0) to min(x + dx, 2047) do ClearLandPixel(y + dy, i);
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if ((y - dy) and $FFFFFC00) = 0 then
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   for i:= max(x - dx, 0) to min(x + dx, 2047) do ClearLandPixel(y - dy, i);
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if ((y + dx) and $FFFFFC00) = 0 then
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   for i:= max(x - dy, 0) to min(x + dy, 2047) do ClearLandPixel(y + dx, i);
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if ((y - dx) and $FFFFFC00) = 0 then
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   for i:= max(x - dy, 0) to min(x + dy, 2047) do ClearLandPixel(y - dx, i);
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end;
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procedure FillLandCircleLinesEBC(x, y, dx, dy: LongInt);
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var i: LongInt;
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begin
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if ((y + dy) and $FFFFFC00) = 0 then
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   for i:= max(x - dx, 0) to min(x + dx, 2047) do
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       if Land[y + dy, i] = COLOR_LAND then SetLandPixel(y + dy, i);
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if ((y - dy) and $FFFFFC00) = 0 then
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   for i:= max(x - dx, 0) to min(x + dx, 2047) do
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       if Land[y - dy, i] = COLOR_LAND then SetLandPixel(y - dy, i);
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if ((y + dx) and $FFFFFC00) = 0 then
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   for i:= max(x - dy, 0) to min(x + dy, 2047) do
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       if Land[y + dx, i] = COLOR_LAND then SetLandPixel(y + dx, i);
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if ((y - dx) and $FFFFFC00) = 0 then
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   for i:= max(x - dy, 0) to min(x + dy, 2047) do
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       if Land[y - dx, i] = COLOR_LAND then SetLandPixel(y - dx, i);
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end;
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procedure DrawExplosion(X, Y, Radius: LongInt);
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var dx, dy, d: LongInt;
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begin
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FillRoundInLand(X, Y, Radius, 0);
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if SDL_MustLock(LandSurface) then
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   SDLTry(SDL_LockSurface(LandSurface) >= 0, true);
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  dx:= 0;
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  dy:= Radius;
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  d:= 3 - 2 * Radius;
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  while (dx < dy) do
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     begin
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     FillLandCircleLines0(x, y, dx, dy);
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     if (d < 0)
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     then d:= d + 4 * dx + 6
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     else begin
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          d:= d + 4 * (dx - dy) + 10;
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          dec(dy)
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          end;
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     inc(dx)
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     end;
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  if (dx = dy) then FillLandCircleLines0(x, y, dx, dy);
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  inc(Radius, 4);
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  dx:= 0;
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  dy:= Radius;
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  d:= 3 - 2 * Radius;
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  while (dx < dy) do
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     begin
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     FillLandCircleLinesEBC(x, y, dx, dy);
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     if (d < 0)
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     then d:= d + 4 * dx + 6
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     else begin
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          d:= d + 4 * (dx - dy) + 10;
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          dec(dy)
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          end;
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     inc(dx)
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     end;
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  if (dx = dy) then FillLandCircleLinesEBC(x, y, dx, dy);
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if SDL_MustLock(LandSurface) then
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   SDL_UnlockSurface(LandSurface);
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end;
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procedure DrawHLinesExplosions(ar: PRangeArray; Radius: LongInt; y, dY: LongInt; Count: Byte);
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var tx, ty, i: LongInt;
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begin
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if SDL_MustLock(LandSurface) then
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   SDL_LockSurface(LandSurface);
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for i:= 0 to Pred(Count) do
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    begin
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a7c2a61524c2 Cardinal -> Longword
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    for ty:= max(y - Radius, 0) to min(y + Radius, 1023) do
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        for tx:= max(0, ar^[i].Left - Radius) to min(2047, ar^[i].Right + Radius) do
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            ClearLandPixel(ty, tx);
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    inc(y, dY)
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    end;
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inc(Radius, 4);
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dec(y, Count * dY);
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for i:= 0 to Pred(Count) do
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    begin
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    for ty:= max(y - Radius, 0) to min(y + Radius, 1023) do
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        for tx:= max(0, ar^[i].Left - Radius) to min(2047, ar^[i].Right + Radius) do
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            if Land[ty, tx] = $FFFFFF then
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                  SetLandPixel(ty, tx);
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    inc(y, dY)
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    end;
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if SDL_MustLock(LandSurface) then
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   SDL_UnlockSurface(LandSurface);
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end;
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//
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//  - (dX, dY) - direction, vector of length = 0.5
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//
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procedure DrawTunnel(X, Y, dX, dY: hwFloat; ticks, HalfWidth: LongInt);
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var nx, ny, dX8, dY8: hwFloat;
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    i, t, tx, ty: Longint;
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begin  // (-dY, dX) is (dX, dY) rotated by PI/2
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if SDL_MustLock(LandSurface) then
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   SDL_LockSurface(LandSurface);
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nx:= X + dY * (HalfWidth + 8);
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ny:= Y - dX * (HalfWidth + 8);
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dX8:= dX * 8;
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dY8:= dY * 8;
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for i:= 0 to 7 do
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    begin
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    X:= nx - dX8;
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    Y:= ny - dY8;
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    for t:= -8 to ticks + 8 do
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        {$include tunsetborder.inc}
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    nx:= nx - dY;
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    ny:= ny + dX;
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    end;
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for i:= -HalfWidth to HalfWidth do
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    begin
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    X:= nx - dX8;
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    Y:= ny - dY8;
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    for t:= 0 to 7 do
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        {$include tunsetborder.inc}
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    X:= nx;
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    Y:= ny;
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    for t:= 0 to ticks do
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        begin
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        X:= X + dX;
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        Y:= Y + dY;
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        tx:= hwRound(X);
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        ty:= hwRound(Y);
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        if ((ty and $FFFFFC00) = 0) and ((tx and $FFFFF800) = 0) then
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         if Land[ty, tx] = COLOR_LAND then
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           begin
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           Land[ty, tx]:= 0;
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           ClearLandPixel(ty, tx);
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           end
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        end;
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    for t:= 0 to 7 do
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        {$include tunsetborder.inc}
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    nx:= nx - dY;
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    ny:= ny + dX;
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    end;
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for i:= 0 to 7 do
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    begin
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    X:= nx - dX8;
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    Y:= ny - dY8;
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    for t:= -8 to ticks + 8 do
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        {$include tunsetborder.inc}
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    nx:= nx - dY;
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    ny:= ny + dX;
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    end;
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if SDL_MustLock(LandSurface) then
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   SDL_UnlockSurface(LandSurface)
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end;
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function TryPlaceOnLand(cpX, cpY: LongInt; Obj: TSprite; Frame: LongInt): boolean;
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var X, Y, bpp, h, w: LongInt;
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    p: PByteArray;
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    r, rr: TSDL_Rect;
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    Image: PSDL_Surface;
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begin
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Image:= SpritesData[Obj].Surface;
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w:= SpritesData[Obj].Width;
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h:= SpritesData[Obj].Height; 
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if SDL_MustLock(Image) then
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   SDLTry(SDL_LockSurface(Image) >= 0, true);
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bpp:= Image^.format^.BytesPerPixel;
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TryDo(bpp <> 1, 'We don''t work with 8 bit surfaces', true);
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// Check that sprites fits free space
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p:= @(PByteArray(Image^.pixels)^[Image^.pitch * Frame * h]);
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   340
case bpp of
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   341
     2: for y:= 0 to Pred(h) do
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            begin
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   343
            for x:= 0 to Pred(w) do
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   344
                if PWord(@(p^[x * 2]))^ <> 0 then
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   345
                   if (((cpY + y) and $FFFFFC00) <> 0) or
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   346
                      (((cpX + x) and $FFFFF800) <> 0) or
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   347
                      (Land[cpY + y, cpX + x] <> 0) then
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   348
                      begin
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   349
                      if SDL_MustLock(Image) then
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   350
                         SDL_UnlockSurface(Image);
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                      exit(false)
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   352
                      end;
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            p:= @(p^[Image^.pitch]);
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   354
            end;
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   355
     3: for y:= 0 to Pred(h) do
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   356
            begin
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   357
            for x:= 0 to Pred(w) do
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   358
                if  (p^[x * 3 + 0] <> 0)
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   359
                 or (p^[x * 3 + 1] <> 0)
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   360
                 or (p^[x * 3 + 2] <> 0) then
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   361
                   if (((cpY + y) and $FFFFFC00) <> 0) or
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   362
                      (((cpX + x) and $FFFFF800) <> 0) or
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   363
                      (Land[cpY + y, cpX + x] <> 0) then
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   364
                      begin
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   365
                      if SDL_MustLock(Image) then
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   366
                         SDL_UnlockSurface(Image);
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   367
                      exit(false)
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diff changeset
   368
                      end;
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   369
            p:= @(p^[Image^.pitch]);
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   370
            end;
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   371
     4: for y:= 0 to Pred(h) do
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   372
            begin
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   373
            for x:= 0 to Pred(w) do
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   374
                if PLongword(@(p^[x * 4]))^ <> 0 then
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   375
                   if (((cpY + y) and $FFFFFC00) <> 0) or
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   376
                      (((cpX + x) and $FFFFF800) <> 0) or
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diff changeset
   377
                      (Land[cpY + y, cpX + x] <> 0) then
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   378
                      begin
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   379
                      if SDL_MustLock(Image) then
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   380
                         SDL_UnlockSurface(Image);
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   381
                      exit(false)
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   382
                      end;
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   383
            p:= @(p^[Image^.pitch]);
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   384
            end;
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   385
     end;
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diff changeset
   386
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   387
// Checked, now place
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   388
p:= @(PByteArray(Image^.pixels)^[Image^.pitch * Frame * h]);
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   389
case bpp of
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   390
     2: for y:= 0 to Pred(h) do
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diff changeset
   391
            begin
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diff changeset
   392
            for x:= 0 to Pred(w) do
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diff changeset
   393
                if PWord(@(p^[x * 2]))^ <> 0 then Land[cpY + y, cpX + x]:= COLOR_LAND;
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   394
            p:= @(p^[Image^.pitch]);
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diff changeset
   395
            end;
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diff changeset
   396
     3: for y:= 0 to Pred(h) do
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diff changeset
   397
            begin
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parents: 393
diff changeset
   398
            for x:= 0 to Pred(w) do
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diff changeset
   399
                if  (p^[x * 3 + 0] <> 0)
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diff changeset
   400
                 or (p^[x * 3 + 1] <> 0)
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diff changeset
   401
                 or (p^[x * 3 + 2] <> 0) then Land[cpY + y, cpX + x]:= COLOR_LAND;
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parents: 393
diff changeset
   402
            p:= @(p^[Image^.pitch]);
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parents: 393
diff changeset
   403
            end;
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parents: 393
diff changeset
   404
     4: for y:= 0 to Pred(h) do
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parents: 393
diff changeset
   405
            begin
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parents: 393
diff changeset
   406
            for x:= 0 to Pred(w) do
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parents: 393
diff changeset
   407
                if PLongword(@(p^[x * 4]))^ <> 0 then Land[cpY + y, cpX + x]:= COLOR_LAND;
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parents: 393
diff changeset
   408
            p:= @(p^[Image^.pitch]);
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diff changeset
   409
            end;
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diff changeset
   410
     end;
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diff changeset
   411
if SDL_MustLock(Image) then
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diff changeset
   412
   SDL_UnlockSurface(Image);
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diff changeset
   413
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diff changeset
   414
// Draw sprite on Land surface
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diff changeset
   415
r.x:= 0;
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diff changeset
   416
r.y:= SpritesData[Obj].Height * Frame;
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diff changeset
   417
r.w:= SpritesData[Obj].Width;
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diff changeset
   418
r.h:= SpritesData[Obj].Height;
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diff changeset
   419
rr.x:= cpX;
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diff changeset
   420
rr.y:= cpY;
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diff changeset
   421
SDL_UpperBlit(Image, @r, LandSurface, @rr);
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diff changeset
   422
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   423
TryPlaceOnLand:= true
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diff changeset
   424
end;
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diff changeset
   425
184
f97a7a3dc8f6 - Update more headers
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   426
f97a7a3dc8f6 - Update more headers
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   427
end.