diff -r 0e27949850e3 -r 839fd258ae6f hedgewars/uLandGraphics.pas
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hedgewars/uLandGraphics.pas	Fri Jan 20 19:02:50 2006 +0000
@@ -0,0 +1,237 @@
+unit uLandGraphics;
+interface
+
+type PRangeArray = ^TRangeArray;
+     TRangeArray = array[0..31] of record
+                                   Left, Right: integer;
+                                   end;
+
+procedure DrawExplosion(X, Y, Radius: integer);
+procedure DrawHLinesExplosions(ar: PRangeArray; Radius: Longword; y, dY: integer; Count: Byte);
+procedure DrawTunnel(X, Y, dX, dY: real; ticks, HalfWidth: integer);
+procedure FillRoundInLand(X, Y, Radius: integer; Value: Longword);
+
+implementation
+uses SDLh, uStore, uMisc, uLand;
+
+procedure FillCircleLines(x, y, dx, dy: integer; Value: Longword);
+var i: integer;
+begin
+if ((y + dy) and $FFFFFC00) = 0 then
+   for i:= max(x - dx, 0) to min(x + dx, 2047) do Land[y + dy, i]:= Value;
+if ((y - dy) and $FFFFFC00) = 0 then
+   for i:= max(x - dx, 0) to min(x + dx, 2047) do Land[y - dy, i]:= Value;
+if ((y + dx) and $FFFFFC00) = 0 then
+   for i:= max(x - dy, 0) to min(x + dy, 2047) do Land[y + dx, i]:= Value;
+if ((y - dx) and $FFFFFC00) = 0 then
+   for i:= max(x - dy, 0) to min(x + dy, 2047) do Land[y - dx, i]:= Value;
+end;
+
+procedure FillRoundInLand(X, Y, Radius: integer; Value: Longword);
+var dx, dy, d: integer;
+begin
+  dx:= 0;
+  dy:= Radius;
+  d:= 3 - 2 * Radius;
+  while (dx < dy) do
+     begin
+     FillCircleLines(x, y, dx, dy, Value);
+     if (d < 0)
+     then d:= d + 4 * dx + 6
+     else begin
+          d:= d + 4 * (dx - dy) + 10;
+          dec(dy)
+          end;
+     inc(dx)
+     end;
+  if (dx = dy) then FillCircleLines(x, y, dx, dy, Value);
+end;
+
+procedure DrawExplosion(X, Y, Radius: integer);
+var ty, tx, p: integer;
+begin
+FillRoundInLand(X, Y, Radius, 0);
+
+if SDL_MustLock(LandSurface) then
+   SDLTry(SDL_LockSurface(LandSurface) >= 0, true);
+
+p:= integer(LandSurface.pixels);
+case LandSurface.format.BytesPerPixel of
+     1: ;// not supported
+     2: for ty:= max(-Radius, -y) to min(Radius, 1023 - y) do
+            for tx:= max(0, round(x-radius*sqrt(1-sqr(ty/radius)))) to min(2047, round(x+radius*sqrt(1-sqr(ty/radius)))) do
+                PWord(p + LandSurface.pitch*(y + ty) + tx * 2)^:= 0;
+     3: for ty:= max(-Radius, -y) to min(Radius, 1023 - y) do
+            for tx:= max(0, round(x-radius*sqrt(1-sqr(ty/radius)))) to min(2047, round(x+radius*sqrt(1-sqr(ty/radius)))) do
+                begin
+                PByte(p + LandSurface.pitch*(y + ty) + tx * 3 + 0)^:= 0;
+                PByte(p + LandSurface.pitch*(y + ty) + tx * 3 + 1)^:= 0;
+                PByte(p + LandSurface.pitch*(y + ty) + tx * 3 + 2)^:= 0;
+                end;
+     4: for ty:= max(-Radius, -y) to min(Radius, 1023 - y) do
+            for tx:= max(0, round(x-radius*sqrt(1-sqr(ty/radius)))) to min(2047, round(x+radius*sqrt(1-sqr(ty/radius)))) do
+                PLongword(p + LandSurface.pitch*(y + ty) + tx * 4)^:= 0;
+     end;
+
+inc(Radius, 4);
+
+case LandSurface.format.BytesPerPixel of
+     1: ;// not supported
+     2: for ty:= max(-Radius, -y) to min(Radius, 1023 - y) do
+            for tx:= max(0, round(x-radius*sqrt(1-sqr(ty/radius)))) to min(2047, round(x+radius*sqrt(1-sqr(ty/radius)))) do
+               if Land[y + ty, tx] = $FFFFFF then
+                  PWord(p + LandSurface.pitch*(y + ty) + tx * 2)^:= cExplosionBorderColor;
+     3: for ty:= max(-Radius, -y) to min(Radius, 1023 - y) do
+            for tx:= max(0, round(x-radius*sqrt(1-sqr(ty/radius)))) to min(2047, round(x+radius*sqrt(1-sqr(ty/radius)))) do
+               if Land[y + ty, tx] = $FFFFFF then
+                begin
+                PByte(p + LandSurface.pitch*(y + ty) + tx * 3 + 0)^:= cExplosionBorderColor and $FF;
+                PByte(p + LandSurface.pitch*(y + ty) + tx * 3 + 1)^:= (cExplosionBorderColor shr 8) and $FF;
+                PByte(p + LandSurface.pitch*(y + ty) + tx * 3 + 2)^:= (cExplosionBorderColor shr 16);
+                end;
+     4: for ty:= max(-Radius, -y) to min(Radius, 1023 - y) do
+            for tx:= max(0, round(x-radius*sqrt(1-sqr(ty/radius)))) to min(2047, round(x+radius*sqrt(1-sqr(ty/radius)))) do
+               if Land[y + ty, tx] = $FFFFFF then
+                   PLongword(p + LandSurface.pitch*(y + ty) + tx * 4)^:= cExplosionBorderColor;
+     end;
+
+if SDL_MustLock(LandSurface) then
+   SDL_UnlockSurface(LandSurface);
+
+SDL_UpdateRect(LandSurface, X - Radius, Y - Radius, Radius * 2, Radius * 2)
+end;
+
+procedure DrawHLinesExplosions(ar: PRangeArray; Radius: Longword; y, dY: integer; Count: Byte);
+var tx, ty, i, p: integer;
+begin
+if SDL_MustLock(LandSurface) then
+   SDL_LockSurface(LandSurface);
+
+p:= integer(LandSurface.pixels);
+for i:= 0 to Pred(Count) do
+    begin
+    case LandSurface.format.BytesPerPixel of
+     1: ;
+     2: for ty:= max(-Radius, -y) to min(Radius, 1023 - y) do
+            for tx:= max(0, round(ar[i].Left - radius*sqrt(1-sqr(ty/radius)))) to min(2047, round(ar[i].Right + radius*sqrt(1-sqr(ty/radius)))) do
+                PWord(p + LandSurface.pitch*(y + ty) + tx * 2)^:= 0;
+     3: for ty:= max(-Radius, -y) to min(Radius, 1023 - y) do
+            for tx:= max(0, round(ar[i].Left - radius*sqrt(1-sqr(ty/radius)))) to min(2047, round(ar[i].Right + radius*sqrt(1-sqr(ty/radius)))) do
+                begin
+                PByte(p + LandSurface.pitch*(y + ty) + tx * 3 + 0)^:= 0;
+                PByte(p + LandSurface.pitch*(y + ty) + tx * 3 + 1)^:= 0;
+                PByte(p + LandSurface.pitch*(y + ty) + tx * 3 + 2)^:= 0;
+                end;
+     4: for ty:= max(-Radius, -y) to min(Radius, 1023 - y) do
+            for tx:= max(0, round(ar[i].Left - radius*sqrt(1-sqr(ty/radius)))) to min(2047, round(ar[i].Right + radius*sqrt(1-sqr(ty/radius)))) do
+                PLongword(p + LandSurface.pitch*(y + ty) + tx * 4)^:= 0;
+     end;
+    inc(y, dY)
+    end;
+
+inc(Radius, 4);
+dec(y, Count*dY);
+
+for i:= 0 to Pred(Count) do
+    begin
+    case LandSurface.format.BytesPerPixel of
+     1: ;
+     2: for ty:= max(-Radius, -y) to min(Radius, 1023 - y) do
+            for tx:= max(0, round(ar[i].Left - radius*sqrt(1-sqr(ty/radius)))) to min(2047, round(ar[i].Right + radius*sqrt(1-sqr(ty/radius)))) do
+               if Land[y + ty, tx] = $FFFFFF then
+                  PWord(p + LandSurface.pitch*(y + ty) + tx * 2)^:= cExplosionBorderColor;
+     3: for ty:= max(-Radius, -y) to min(Radius, 1023 - y) do
+            for tx:= max(0, round(ar[i].Left - radius*sqrt(1-sqr(ty/radius)))) to min(2047, round(ar[i].Right + radius*sqrt(1-sqr(ty/radius)))) do
+               if Land[y + ty, tx] = $FFFFFF then
+                begin
+                PByte(p + LandSurface.pitch*(y + ty) + tx * 3 + 0)^:= cExplosionBorderColor and $FF;
+                PByte(p + LandSurface.pitch*(y + ty) + tx * 3 + 1)^:= (cExplosionBorderColor shr 8) and $FF;
+                PByte(p + LandSurface.pitch*(y + ty) + tx * 3 + 2)^:= (cExplosionBorderColor shr 16);
+                end;
+     4: for ty:= max(-Radius, -y) to min(Radius, 1023 - y) do
+            for tx:= max(0, round(ar[i].Left - radius*sqrt(1-sqr(ty/radius)))) to min(2047, round(ar[i].Right + radius*sqrt(1-sqr(ty/radius)))) do
+               if Land[y + ty, tx] = $FFFFFF then
+                   PLongword(p + LandSurface.pitch*(y + ty) + tx * 4)^:= cExplosionBorderColor;
+     end;
+    inc(y, dY)
+    end;
+
+if SDL_MustLock(LandSurface) then
+   SDL_UnlockSurface(LandSurface);
+end;
+
+//
+//  - (dX, dY) - direction, vector of length = 0.5
+//
+procedure DrawTunnel(X, Y, dX, dY: real; ticks, HalfWidth: integer);
+var nx, ny: real;
+    i, t, tx, ty, p: integer;
+begin  // (-dY, dX) is (dX, dY) turned by PI/2
+if SDL_MustLock(LandSurface) then
+   SDL_LockSurface(LandSurface);
+
+nx:= X + dY * (HalfWidth + 8);
+ny:= Y - dX * (HalfWidth + 8);
+p:= integer(LandSurface.pixels);
+
+for i:= 0 to 7 do
+    begin
+    X:= nx - 8 * dX;
+    Y:= ny - 8 * dY;
+    for t:= -8 to ticks + 8 do
+        {$include tunsetborder.inc}
+    nx:= nx - dY;
+    ny:= ny + dX;
+    end;
+
+for i:= -HalfWidth to HalfWidth do
+    begin
+    X:= nx - dX * 8;
+    Y:= ny - dY * 8;
+    for t:= 0 to 7 do
+        {$include tunsetborder.inc}
+    X:= nx;
+    Y:= ny;
+    for t:= 0 to ticks do
+        begin
+        X:= X + dX;
+        Y:= Y + dY;
+        tx:= round(X);
+        ty:= round(Y);
+        if ((ty and $FFFFFC00) = 0) and ((tx and $FFFFF800) = 0) then
+           begin
+           Land[ty, tx]:= 0;
+           case LandSurface.format.BytesPerPixel of
+                1: ;
+                2: PWord(p + LandSurface.pitch * ty + tx * 2)^:= 0;
+                3: begin
+                   PByte(p + LandSurface.pitch * ty + tx * 3 + 0)^:= 0;
+                   PByte(p + LandSurface.pitch * ty + tx * 3 + 1)^:= 0;
+                   PByte(p + LandSurface.pitch * ty + tx * 3 + 2)^:= 0;
+                   end;
+                4: PLongword(p + LandSurface.pitch * ty + tx * 4)^:= 0;
+                end
+           end
+        end;
+    for t:= 0 to 7 do
+        {$include tunsetborder.inc}
+    nx:= nx - dY;
+    ny:= ny + dX;
+    end;
+
+for i:= 0 to 7 do
+    begin
+    X:= nx - 8 * dX;
+    Y:= ny - 8 * dY;
+    for t:= -8 to ticks + 8 do
+        {$include tunsetborder.inc}
+    nx:= nx - dY;
+    ny:= ny + dX;
+    end;
+
+if SDL_MustLock(LandSurface) then
+   SDL_UnlockSurface(LandSurface)
+end;
+
+
+end.