--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hedgewars/uLandTexture.pas	Wed Feb 18 16:35:03 2009 +0000
@@ -0,0 +1,67 @@
+(*
+ * Hedgewars, a free turn based strategy game
+ * Copyright (c) 2009 Andrey Korotaev <unC0Rr@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ *)
+
+unit uLandTexture;
+interface
+uses SDLh, uLandTemplates, uFloat, GL, uConsts;
+
+procedure UpdateLandTexture(Y, Height: LongInt);
+procedure DrawLand (X, Y: LongInt);
+
+implementation
+uses uMisc, uLand, uStore;
+
+var LandTexture: PTexture = nil;
+    updTopY: LongInt = LAND_HEIGHT;
+    updBottomY: LongInt = 0;
+
+
+procedure UpdateLandTexture(Y, Height: LongInt);
+begin
+if (Height <= 0) then exit;
+
+TryDo((Y >= 0) and (Y < LAND_HEIGHT), 'UpdateLandTexture: wrong Y parameter', true);
+TryDo(Y + Height <= LAND_HEIGHT, 'UpdateLandTexture: wrong Height parameter', true);
+
+if Y < updTopY then updTopY:= Y;
+if Y + Height > updBottomY then updBottomY:= Y + Height
+end;
+
+procedure RealLandTexUpdate;
+begin
+if updBottomY = 0 then exit;
+
+if LandTexture = nil then
+	LandTexture:= NewTexture(LAND_WIDTH, LAND_HEIGHT, @LandPixels)
+else
+	begin
+	glBindTexture(GL_TEXTURE_2D, LandTexture^.id);
+	glTexSubImage2D(GL_TEXTURE_2D, 0, 0, updTopY, LAND_WIDTH, updBottomY - updTopY, GL_RGBA, GL_UNSIGNED_BYTE, @LandPixels[updTopY, 0]);
+	end;
+
+updTopY:= LAND_HEIGHT + 1;
+updBottomY:= 0
+end;
+
+procedure DrawLand(X, Y: LongInt);
+begin
+RealLandTexUpdate;
+DrawTexture(X, Y, LandTexture)
+end;
+
+end.