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−(*
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− * Hedgewars, a free turn based strategy game
+
− * Copyright (c) 2004-2011 Andrey Korotaev <unC0Rr@gmail.com>
+
− *
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− * 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
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− * the Free Software Foundation; version 2 of the License
+
− *
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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
+
− * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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− * 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"}
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−
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−unit uTextures;
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−interface
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−uses SDLh, uTypes;
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−
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−function  NewTexture(width, height: Longword; buf: Pointer): PTexture;
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−procedure Surface2GrayScale(surf: PSDL_Surface);
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−function  Surface2Tex(surf: PSDL_Surface; enableClamp: boolean): PTexture;
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−procedure FreeTexture(tex: PTexture);
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−
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−procedure initModule;
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−procedure freeModule;
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−
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−implementation
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−uses GLunit, uUtils, uVariables, uConsts, uDebug;
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−
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−var TextureList: PTexture;
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−
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−
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−procedure SetTextureParameters(enableClamp: Boolean);
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−begin
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−    if enableClamp and ((cReducedQuality and rqClampLess) = 0) then
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−    begin
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−        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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−        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE)
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−    end;
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−    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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−    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR)
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−end;
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−
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−procedure ResetVertexArrays(texture: PTexture);
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−begin
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−with texture^ do
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−    begin
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−    vb[0].X:= 0;
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−    vb[0].Y:= 0;
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−    vb[1].X:= w;
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−    vb[1].Y:= 0;
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−    vb[2].X:= w;
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−    vb[2].Y:= h;
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−    vb[3].X:= 0;
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−    vb[3].Y:= h;
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−
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−    tb[0].X:= 0;
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−    tb[0].Y:= 0;
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−    tb[1].X:= rx;
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−    tb[1].Y:= 0;
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−    tb[2].X:= rx;
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−    tb[2].Y:= ry;
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−    tb[3].X:= 0;
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−    tb[3].Y:= ry
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−    end;
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−end;
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−
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−function NewTexture(width, height: Longword; buf: Pointer): PTexture;
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−begin
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−new(NewTexture);
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−NewTexture^.PrevTexture:= nil;
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−NewTexture^.NextTexture:= nil;
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−NewTexture^.Scale:= 1;
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−if TextureList <> nil then
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−    begin
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−    TextureList^.PrevTexture:= NewTexture;
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−    NewTexture^.NextTexture:= TextureList
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−    end;
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−TextureList:= NewTexture;
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−
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−NewTexture^.w:= width;
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−NewTexture^.h:= height;
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−NewTexture^.rx:= 1.0;
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−NewTexture^.ry:= 1.0;
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−
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−ResetVertexArrays(NewTexture);
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−
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−glGenTextures(1, @NewTexture^.id);
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−
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−glBindTexture(GL_TEXTURE_2D, NewTexture^.id);
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−glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, buf);
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−
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−SetTextureParameters(true);
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−end;
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−
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−procedure Surface2GrayScale(surf: PSDL_Surface);
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−var tw, x, y: Longword;
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−    fromP4: PLongWordArray;
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−begin
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−fromP4:= Surf^.pixels;
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−for y:= 0 to Pred(Surf^.h) do
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−    begin
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−    for x:= 0 to Pred(Surf^.w) do 
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−        begin
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−        tw:= fromP4^[x];
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−        tw:= round((tw shr RShift and $FF) * RGB_LUMINANCE_RED +  
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−              (tw shr GShift and $FF) * RGB_LUMINANCE_GREEN + 
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−              (tw shr BShift and $FF) * RGB_LUMINANCE_BLUE);
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−        if tw > 255 then tw:= 255;
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−        tw:= (tw and $FF shl RShift) or (tw and $FF shl BShift) or (tw and $FF shl GShift) or (fromP4^[x] and AMask);
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−        fromP4^[x]:= tw;
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−        end;
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−    fromP4:= @(fromP4^[Surf^.pitch div 4])
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−    end;
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−end;
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−function Surface2Tex(surf: PSDL_Surface; enableClamp: boolean): PTexture;
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−var tw, th, x, y: Longword;
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−    tmpp: pointer;
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−    fromP4, toP4: PLongWordArray;
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−begin
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−new(Surface2Tex);
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−Surface2Tex^.PrevTexture:= nil;
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−Surface2Tex^.NextTexture:= nil;
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−if TextureList <> nil then
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−    begin
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−    TextureList^.PrevTexture:= Surface2Tex;
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−    Surface2Tex^.NextTexture:= TextureList
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−    end;
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−TextureList:= Surface2Tex;
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−
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−Surface2Tex^.w:= surf^.w;
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−Surface2Tex^.h:= surf^.h;
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−
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−if (surf^.format^.BytesPerPixel <> 4) then
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−    begin
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−    TryDo(false, 'Surface2Tex failed, expecting 32 bit surface', true);
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−    Surface2Tex^.id:= 0;
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−    exit
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−    end;
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−
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−
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−glGenTextures(1, @Surface2Tex^.id);
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−
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−glBindTexture(GL_TEXTURE_2D, Surface2Tex^.id);
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−
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−if SDL_MustLock(surf) then
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−    SDLTry(SDL_LockSurface(surf) >= 0, true);
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−
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−fromP4:= Surf^.pixels;
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−
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−if cGrayScale then Surface2GrayScale(Surf);
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−
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−if (not SupportNPOTT) and (not (isPowerOf2(Surf^.w) and isPowerOf2(Surf^.h))) then
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−    begin
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−    tw:= toPowerOf2(Surf^.w);
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−    th:= toPowerOf2(Surf^.h);
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−
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−    Surface2Tex^.rx:= Surf^.w / tw;
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−    Surface2Tex^.ry:= Surf^.h / th;
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−
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−    GetMem(tmpp, tw * th * surf^.format^.BytesPerPixel);
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−
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−    fromP4:= Surf^.pixels;
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−    toP4:= tmpp;
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−
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−    for y:= 0 to Pred(Surf^.h) do
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−        begin
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−        for x:= 0 to Pred(Surf^.w) do toP4^[x]:= fromP4^[x];
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−        for x:= Surf^.w to Pred(tw) do toP4^[x]:= 0;
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−        toP4:= @(toP4^[tw]);
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−        fromP4:= @(fromP4^[Surf^.pitch div 4])
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−        end;
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−
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−    for y:= Surf^.h to Pred(th) do
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−        begin
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−        for x:= 0 to Pred(tw) do toP4^[x]:= 0;
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−        toP4:= @(toP4^[tw])
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−        end;
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−
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−    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tw, th, 0, GL_RGBA, GL_UNSIGNED_BYTE, tmpp);
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−
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−    FreeMem(tmpp, tw * th * surf^.format^.BytesPerPixel)
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−    end
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−else
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−    begin
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−    Surface2Tex^.rx:= 1.0;
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−    Surface2Tex^.ry:= 1.0;
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−    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, surf^.w, surf^.h, 0, GL_RGBA, GL_UNSIGNED_BYTE, surf^.pixels);
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−    end;
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−
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−ResetVertexArrays(Surface2Tex);
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−
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−if SDL_MustLock(surf) then
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−    SDL_UnlockSurface(surf);
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−
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−SetTextureParameters(enableClamp);
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−end;
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−
+
−// deletes texture and frees the memory allocated for it.
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−// if nil is passed nothing is done
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−procedure FreeTexture(tex: PTexture);
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−begin
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−    if tex <> nil then
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−        begin
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−        if tex^.NextTexture <> nil then
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−            tex^.NextTexture^.PrevTexture:= tex^.PrevTexture;
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−        if tex^.PrevTexture <> nil then
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−            tex^.PrevTexture^.NextTexture:= tex^.NextTexture
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−        else
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−            TextureList:= tex^.NextTexture;
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−        glDeleteTextures(1, @tex^.id);
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−        Dispose(tex);
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−        end
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−end;
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−
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−procedure initModule;
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−begin
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−TextureList:= nil;
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−end;
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−
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−procedure freeModule;
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−begin
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−    if TextureList <> nil then AddFileLog('FIXME FIXME FIXME. App shutdown without full cleanup of texture list.');
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−    while TextureList <> nil do 
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−        begin
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−        AddFileLog('Texture not freed: width='+inttostr(LongInt(TextureList^.w))+' height='+inttostr(LongInt(TextureList^.h))+' priority='+inttostr(round(TextureList^.priority*1000)));
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−        FreeTexture(TextureList);
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−        end
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−end;
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−
+
−end.