(*
* 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
*)
{$INCLUDE "options.inc"}
unit uLandTexture;
interface
uses SDLh;
procedure initModule;
procedure freeModule;
procedure UpdateLandTexture(X, Width, Y, Height: LongInt);
procedure DrawLand(dX, dY: LongInt);
implementation
uses uMisc, uLand, uStore, uConsts, GLunit;
const TEXSIZE = 256;
type TLandRecord = record
shouldUpdate: boolean;
tex: PTexture;
end;
var LandTextures: array of array of TLandRecord;
tmpPixels: array [0..TEXSIZE - 1, 0..TEXSIZE - 1] of LongWord;
LANDTEXARW: LongWord;
LANDTEXARH: LongWord;
function Pixels(x, y: Longword): Pointer;
var ty: Longword;
begin
for ty:= 0 to TEXSIZE - 1 do
Move(LandPixels[y * TEXSIZE + ty, x * TEXSIZE], tmpPixels[ty, 0], sizeof(Longword) * TEXSIZE);
Pixels:= @tmpPixels
end;
function Pixels2(x, y: Longword): Pointer;
var tx, ty: Longword;
begin
for ty:= 0 to TEXSIZE - 1 do
for tx:= 0 to TEXSIZE - 1 do
tmpPixels[ty, tx]:= Land[y * TEXSIZE + ty, x * TEXSIZE + tx] or AMask;
Pixels2:= @tmpPixels
end;
procedure UpdateLandTexture(X, Width, Y, Height: LongInt);
var tx, ty: Longword;
begin
if (Width <= 0) or (Height <= 0) then exit;
TryDo((X >= 0) and (X < LAND_WIDTH), 'UpdateLandTexture: wrong X parameter', true);
TryDo(X + Width <= LAND_WIDTH, 'UpdateLandTexture: wrong Width parameter', true);
TryDo((Y >= 0) and (Y < LAND_HEIGHT), 'UpdateLandTexture: wrong Y parameter', true);
TryDo(Y + Height <= LAND_HEIGHT, 'UpdateLandTexture: wrong Height parameter', true);
if (cReducedQuality and rqBlurryLand) = 0 then
for ty:= Y div TEXSIZE to (Y + Height - 1) div TEXSIZE do
for tx:= X div TEXSIZE to (X + Width - 1) div TEXSIZE do
LandTextures[tx, ty].shouldUpdate:= true
else
for ty:= (Y div TEXSIZE) div 2 to ((Y + Height - 1) div TEXSIZE) div 2 do
for tx:= (X div TEXSIZE) div 2 to ((X + Width - 1) div TEXSIZE) div 2 do
LandTextures[tx, ty].shouldUpdate:= true;
end;
procedure RealLandTexUpdate;
var x, y: LongWord;
begin
if LandTextures[0, 0].tex = nil then
for x:= 0 to LANDTEXARW -1 do
for y:= 0 to LANDTEXARH - 1 do
with LandTextures[x, y] do
begin
tex:= NewTexture(TEXSIZE, TEXSIZE, Pixels(x, y));
glBindTexture(GL_TEXTURE_2D, tex^.id);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_PRIORITY, tpHigh);
end
else
for x:= 0 to LANDTEXARW -1 do
for y:= 0 to LANDTEXARH - 1 do
with LandTextures[x, y] do
if shouldUpdate then
begin
shouldUpdate:= false;
glBindTexture(GL_TEXTURE_2D, tex^.id);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, TEXSIZE, TEXSIZE, 0, GL_RGBA, GL_UNSIGNED_BYTE, Pixels(x,y));
end
end;
procedure DrawLand(dX, dY: LongInt);
var x, y: LongInt;
begin
RealLandTexUpdate;
for x:= 0 to LANDTEXARW -1 do
for y:= 0 to LANDTEXARH - 1 do
with LandTextures[x, y] do
if (cReducedQuality and rqBlurryLand) = 0 then
DrawTexture(dX + x * TEXSIZE, dY + y * TEXSIZE, tex)
else
DrawTexture(dX + x * TEXSIZE * 2, dY + y * TEXSIZE * 2, tex, 2.0)
end;
procedure initModule;
begin
if (cReducedQuality and rqBlurryLand) = 0 then
begin
LANDTEXARW:= LAND_WIDTH div TEXSIZE;
LANDTEXARH:= LAND_HEIGHT div TEXSIZE;
end
else
begin
LANDTEXARW:= (LAND_WIDTH div TEXSIZE) div 2;
LANDTEXARH:= (LAND_HEIGHT div TEXSIZE) div 2;
end;
SetLength(LandTextures, LANDTEXARW, LANDTEXARH);
end;
procedure freeModule;
var x, y: LongInt;
begin
for x:= 0 to LANDTEXARW -1 do
for y:= 0 to LANDTEXARH - 1 do
with LandTextures[x, y] do
begin
FreeTexture(tex);
tex:= nil;
end;
if LandBackSurface <> nil then
SDL_FreeSurface(LandBackSurface);
LandBackSurface:= nil;
LandTextures:= nil;
end;
end.