hedgewars/uRenderUtils.pas
author Wuzzy <Wuzzy2@mail.ru>
Wed, 14 Mar 2018 20:39:14 +0100
changeset 13210 c681492df36d
parent 12596 7bae1fab444b
child 13494 8935dcc0e130
permissions -rw-r--r--
Drawn map page: Move save and load buttons, fix points label overlap
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(*
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 * Hedgewars, a free turn based strategy game
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 * Copyright (c) 2004-2015 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 *)
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{$INCLUDE "options.inc"}
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unit uRenderUtils;
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interface
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uses SDLh, uTypes;
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procedure flipSurface(Surface: PSDL_Surface; Vertical: Boolean);
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procedure copyRotatedSurface(src, dest: PSDL_Surface); // this is necessary since width/height are read only in SDL
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procedure copyToXY(src, dest: PSDL_Surface; destX, destY: LongInt); inline;
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procedure copyToXYFromRect(src, dest: PSDL_Surface; srcX, srcY, srcW, srcH, destX, destY: LongInt);
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procedure DrawSprite2Surf(sprite: TSprite; dest: PSDL_Surface; x,y: LongInt); inline;
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procedure DrawSpriteFrame2Surf(sprite: TSprite; dest: PSDL_Surface; x,y: LongInt; frame: LongInt);
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procedure DrawLine2Surf(dest: PSDL_Surface; x0,y0,x1,y1:LongInt; r,g,b: byte);
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procedure DrawRoundRect(rect: PSDL_Rect; BorderColor, FillColor: Longword; Surface: PSDL_Surface; Clear: boolean);
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function  RenderStringTex(s: ansistring; Color: Longword; font: THWFont): PTexture;
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function  RenderStringTexLim(s: ansistring; Color: Longword; font: THWFont; maxLength: LongWord): PTexture;
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function  RenderSpeechBubbleTex(s: ansistring; SpeechType: Longword; font: THWFont): PTexture;
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implementation
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uses uVariables, uConsts, uTextures, SysUtils, uUtils, uDebug;
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procedure DrawRoundRect(rect: PSDL_Rect; BorderColor, FillColor: Longword; Surface: PSDL_Surface; Clear: boolean);
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var r: TSDL_Rect;
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begin
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    r:= rect^;
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    if Clear then
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        SDL_FillRect(Surface, @r, 0);
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    BorderColor:= SDL_MapRGB(Surface^.format, BorderColor shr 16, BorderColor shr 8, BorderColor and $FF);
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    FillColor:= SDL_MapRGB(Surface^.format, FillColor shr 16, FillColor shr 8, FillColor and $FF);
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    r.y:= rect^.y + cFontBorder div 2;
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    r.h:= rect^.h - cFontBorder;
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    SDL_FillRect(Surface, @r, BorderColor);
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    r.x:= rect^.x + cFontBorder div 2;
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    r.w:= rect^.w - cFontBorder;
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    r.y:= rect^.y;
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    r.h:= rect^.h;
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    SDL_FillRect(Surface, @r, BorderColor);
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    r.x:= rect^.x + cFontBorder;
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    r.y:= rect^.y + cFontBorder div 2;
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    r.w:= rect^.w - cFontBorder * 2;
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    r.h:= rect^.h - cFontBorder;
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    SDL_FillRect(Surface, @r, FillColor);
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    r.x:= rect^.x + cFontBorder div 2;
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    r.y:= rect^.y + cFontBorder;
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    r.w:= rect^.w - cFontBorder;
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    r.h:= rect^.h - cFontBorder * 2;
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    SDL_FillRect(Surface, @r, FillColor);
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end;
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(*
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function WriteInRoundRect(Surface: PSDL_Surface; X, Y: LongInt; Color: LongWord; Font: THWFont; s: ansistring): TSDL_Rect;
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begin
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    WriteInRoundRect:= WriteInRoundRect(Surface, X, Y, Color, Font, s, 0);
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end;*)
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function WriteInRoundRect(Surface: PSDL_Surface; X, Y: LongInt; Color: LongWord; Font: THWFont; s: ansistring; maxLength: LongWord): TSDL_Rect;
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var w, h: Longword;
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    tmpsurf: PSDL_Surface;
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    clr: TSDL_Color;
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    finalRect, textRect: TSDL_Rect;
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begin
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    TTF_SizeUTF8(Fontz[Font].Handle, PChar(s), @w, @h);
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    if (maxLength > 0) and (w > maxLength * HDPIScaleFactor) then w := maxLength * HDPIScaleFactor;
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    finalRect.x:= X;
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    finalRect.y:= Y;
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    finalRect.w:= w + cFontBorder * 2 + cFontPadding * 2;
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    finalRect.h:= h + cFontBorder * 2;
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    textRect.x:= X;
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    textRect.y:= Y;
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    textRect.w:= w;
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    textRect.h:= h;
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    DrawRoundRect(@finalRect, cWhiteColor, cNearBlackColor, Surface, true);
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    clr.r:= (Color shr 16) and $FF;
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    clr.g:= (Color shr 8) and $FF;
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    clr.b:= Color and $FF;
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    tmpsurf:= TTF_RenderUTF8_Blended(Fontz[Font].Handle, PChar(s), clr);
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    finalRect.x:= X + cFontBorder + cFontPadding;
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    finalRect.y:= Y + cFontBorder;
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    if SDLCheck(tmpsurf <> nil, 'TTF_RenderUTF8_Blended', true) then
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        exit;
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    SDL_UpperBlit(tmpsurf, @textRect, Surface, @finalRect);
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    SDL_FreeSurface(tmpsurf);
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    finalRect.x:= X;
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    finalRect.y:= Y;
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    finalRect.w:= w + cFontBorder * 2 + cFontPadding * 2;
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    finalRect.h:= h + cFontBorder * 2;
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    WriteInRoundRect:= finalRect;
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end;
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procedure flipSurface(Surface: PSDL_Surface; Vertical: Boolean);
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var y, x, i, j: LongInt;
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    tmpPixel: Longword;
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    pixels: PLongWordArray;
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begin
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    if checkFails(Surface^.format^.BytesPerPixel = 4, 'flipSurface failed, expecting 32 bit surface', true) then
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        exit;
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    SDL_LockSurface(Surface);
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    pixels:= Surface^.pixels;
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    if Vertical then
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    for y := 0 to (Surface^.h div 2) - 1 do
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        for x := 0 to Surface^.w - 1 do
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            begin
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            i:= y * Surface^.w + x;
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            j:= (Surface^.h - y - 1) * Surface^.w + x;
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            tmpPixel:= pixels^[i];
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            pixels^[i]:= pixels^[j];
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            pixels^[j]:= tmpPixel;
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            end
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    else
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    for x := 0 to (Surface^.w div 2) - 1 do
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        for y := 0 to Surface^.h - 1 do
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            begin
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            i:= y*Surface^.w + x;
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            j:= y*Surface^.w + (Surface^.w - x - 1);
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            tmpPixel:= pixels^[i];
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            pixels^[i]:= pixels^[j];
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            pixels^[j]:= tmpPixel;
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            end;
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    SDL_UnlockSurface(Surface);
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end;
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procedure copyToXY(src, dest: PSDL_Surface; destX, destY: LongInt); inline;
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begin
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    // copy from complete src
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    copyToXYFromRect(src, dest, 0, 0, src^.w, src^.h, destX, destY);
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end;
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procedure copyToXYFromRect(src, dest: PSDL_Surface; srcX, srcY, srcW, srcH, destX, destY: LongInt);
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var spi, dpi, iX, iY, dX, dY, lX, lY, aT: LongInt;
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    srcPixels, destPixels: PLongWordArray;
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    rD, gD, bD, aD, rT, gT, bT: Byte;
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begin
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    SDL_LockSurface(src);
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    SDL_LockSurface(dest);
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    srcPixels:= src^.pixels;
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    destPixels:= dest^.pixels;
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    // what's the offset between src and dest coords?
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    dX:= destX - srcX;
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    dY:= destY - srcY;
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    // let's figure out where the rectangle we can actually copy ends
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    lX:= min(srcX + srcW, src^.w) - 1;
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    if lX + dx >= dest^.w then lX:= dest^.w - dx - 1;
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    lY:= min(srcY + srcH, src^.h) - 1;
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    if lY + dy >= dest^.h then lY:= dest^.h - dy - 1;
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    for iX:= srcX to lX do
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    for iY:= srcY to lY do
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        begin
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        // src pixel index
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        spi:= iY * src^.w  + iX;
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        // dest pixel index
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        dpi:= (iY + dY) * dest^.w + (iX + dX);
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        // get src alpha (and set it as target alpha for now)
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        aT:= (srcPixels^[spi] and AMask) shr AShift;
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        // src pixel opaque?
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        if aT = 255 then
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            begin
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            // just copy full pixel
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            destPixels^[dpi]:= srcPixels^[spi];
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            continue;
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            end;
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        // get dst alpha (without shift for now)
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        aD:= (destPixels^[dpi] and AMask) shr AShift;
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        // dest completely transparent?
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        if aD = 0 then
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            begin
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            // just copy src pixel
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            destPixels^[dpi]:= srcPixels^[spi];
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            continue;
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            end;
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        // looks like some blending is necessary
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        // set color of target RGB to src for now
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        SDL_GetRGB(srcPixels^[spi],  src^.format,  @rT, @gT, @bT);
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        SDL_GetRGB(destPixels^[dpi], dest^.format, @rD, @gD, @bD);
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        // note: this is not how to correctly blend RGB, just sayin' (R,G,B are not linear...)
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        rT:= (rD * (255 - aT) + rT * aT) div 255;
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        gT:= (gD * (255 - aT) + gT * aT) div 255;
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        bT:= (bD * (255 - aT) + bT * aT) div 255;
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        aT:= aD + ((255 - LongInt(aD)) * aT div 255);
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        destPixels^[dpi]:= SDL_MapRGBA(dest^.format, rT, gT, bT, Byte(aT));
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        end;
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    SDL_UnlockSurface(src);
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    SDL_UnlockSurface(dest);
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end;
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procedure DrawSprite2Surf(sprite: TSprite; dest: PSDL_Surface; x,y: LongInt); inline;
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begin
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   DrawSpriteFrame2Surf(sprite, dest, x, y, 0);
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end;
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procedure DrawSpriteFrame2Surf(sprite: TSprite; dest: PSDL_Surface; x,y,frame: LongInt);
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var numFramesFirstCol, row, col: LongInt;
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begin
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    numFramesFirstCol:= SpritesData[sprite].imageHeight div SpritesData[sprite].Height;
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    row:= Frame mod numFramesFirstCol;
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    col:= Frame div numFramesFirstCol;
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    copyToXYFromRect(SpritesData[sprite].Surface, dest,
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             col*SpritesData[sprite].Width,
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             row*SpritesData[sprite].Height,
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             SpritesData[sprite].Width,
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             spritesData[sprite].Height,
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             x,y);
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end;
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procedure DrawLine2Surf(dest: PSDL_Surface; x0, y0,x1,y1: LongInt; r,g,b: byte);
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var
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    dx,dy,err,e2,sx,sy: LongInt;
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    yMax: LongInt;
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    destPixels: PLongwordArray;
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begin
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    //max:= (dest^.pitch div 4) * dest^.h;
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    yMax:= dest^.pitch div 4;
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    SDL_LockSurface(dest);
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    destPixels:= dest^.pixels;
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    dx:= abs(x1-x0);
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    dy:= abs(y1-y0);
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    if x0 < x1 then sx:= 1 else sx:= -1;
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    if y0 < y1 then sy:= 1 else sy:= -1;
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    err:= dx-dy;
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    while(true) do
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        begin
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        destPixels^[(y0 * yMax) + x0]:= SDL_MapRGB(dest^.format, r,g,b); //But will it blend? no
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        if (x0 = x1) and (y0 = y1) then break;
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        e2:= 2*err;
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        if e2 > -dy then
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            begin
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            err:= err - dy;
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            x0 := x0 + sx;
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            end;
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        if e2 < dx then
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            begin
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            err:= err + dx;
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            y0:=y0+sy
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            end;
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        end;
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    SDL_UnlockSurface(dest);
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end;
b211d0b690de Expanded copyToXY, it doesn't copy the whole src sprite, srcX/Y to srcW/h, added DrawSprite2Surf and DrawLine2Surf
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procedure copyRotatedSurface(src, dest: PSDL_Surface); // this is necessary since width/height are read only in SDL, apparently
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var y, x, i, j: LongInt;
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    srcPixels, destPixels: PLongWordArray;
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begin
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    checkFails(src^.format^.BytesPerPixel = 4, 'rotateSurface failed, expecting 32 bit surface', true);
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    checkFails(dest^.format^.BytesPerPixel = 4, 'rotateSurface failed, expecting 32 bit surface', true);
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   288
    if not allOK then exit;
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    SDL_LockSurface(src);
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    SDL_LockSurface(dest);
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    srcPixels:= src^.pixels;
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    destPixels:= dest^.pixels;
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    j:= 0;
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   297
    for x := 0 to src^.w - 1 do
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        for y := 0 to src^.h - 1 do
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            begin
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            i:= (src^.h - 1 - y) * (src^.pitch div 4) + x;
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            destPixels^[j]:= srcPixels^[i];
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            inc(j)
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   303
            end;
8026
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   304
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    SDL_UnlockSurface(src);
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    SDL_UnlockSurface(dest);
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end;
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409dd3851309 add support for default pascal mode by removing default arguments value (maybe this also helps the parser)
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function RenderStringTex(s: ansistring; Color: Longword; font: THWFont): PTexture;
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begin
7013
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    RenderStringTex:= RenderStringTexLim(s, Color, font, 0);
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end;
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   314
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function RenderStringTexLim(s: ansistring; Color: Longword; font: THWFont; maxLength: LongWord): PTexture;
10494
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var w, h: Longword;
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    finalSurface: PSDL_Surface;
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begin
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   319
    if cOnlyStats then
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   320
        begin
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   321
        RenderStringTexLim:= nil;
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   322
        end
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   323
    else
9046f69dae4c In stats-only mode:
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   324
        begin
9046f69dae4c In stats-only mode:
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   325
        if length(s) = 0 then s:= _S' ';
9046f69dae4c In stats-only mode:
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   326
        font:= CheckCJKFont(s, font);
9046f69dae4c In stats-only mode:
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   327
        w:= 0; h:= 0; // avoid compiler hints
9046f69dae4c In stats-only mode:
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   328
        TTF_SizeUTF8(Fontz[font].Handle, PChar(s), @w, @h);
11841
1d41f297b3d3 bit of a start on HDPI monitor support. Fonts.
nemo
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   329
        if (maxLength > 0) and (w > maxLength * HDPIScaleFactor) then w := maxLength * HDPIScaleFactor;
4380
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   330
11841
1d41f297b3d3 bit of a start on HDPI monitor support. Fonts.
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   331
        finalSurface:= SDL_CreateRGBSurface(SDL_SWSURFACE, w + cFontBorder*2 + cFontPadding*2, h + cFontBorder * 2,
10139
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   332
                32, RMask, GMask, BMask, AMask);
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   333
11537
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   334
        if checkFails(finalSurface <> nil, 'RenderString: fail to create surface', true) then
bf86c6cb9341 Bye-bye TryDo
unc0rr
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   335
            exit(nil);
10139
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   336
9046f69dae4c In stats-only mode:
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   337
        WriteInRoundRect(finalSurface, 0, 0, Color, font, s, maxLength);
4380
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   338
12596
7bae1fab444b currently irrelevant sdl call adjustment
sheepluva
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   339
        checkFails(SDL_SetColorKey(finalSurface, SDL_TRUE, 0) = 0, errmsgTransparentSet, false);
4380
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   340
10139
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   341
        RenderStringTexLim:= Surface2Tex(finalSurface, false);
4380
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   342
10139
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   343
        SDL_FreeSurface(finalSurface);
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   344
        end;
4380
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   345
end;
b78638b36b89 Introduce uRenderUtils
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diff changeset
   346
10689
692649e341fc change string types of speech bubbles fix to work with pas2c
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   347
function GetNextSpeechLine(s: ansistring; ldelim: char; var startFrom: LongInt; out substr: ansistring): boolean;
10687
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
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   348
var p, l, m, r: Integer;
10691
97f45f1374be change speechfix implementation (no "continue" anymore
sheepluva
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   349
    newl, skip: boolean;
10687
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   350
    c         : char;
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
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   351
begin
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
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   352
    m:= Length(s);
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
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diff changeset
   353
10690
c3b73dc33294 grmlgrml
sheepluva
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   354
    substr:= '';
c3b73dc33294 grmlgrml
sheepluva
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diff changeset
   355
10689
692649e341fc change string types of speech bubbles fix to work with pas2c
sheepluva
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   356
    SetLengthA(substr, m);
10687
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
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diff changeset
   357
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
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   358
    // number of chars read
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
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diff changeset
   359
    r:= 0;
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
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diff changeset
   360
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
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diff changeset
   361
    // number of chars to be written
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   362
    l:= 0;
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   363
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   364
    newl:= true;
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   365
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   366
    for p:= max(1, startFrom) to m do
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
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diff changeset
   367
        begin
10691
97f45f1374be change speechfix implementation (no "continue" anymore
sheepluva
parents: 10690
diff changeset
   368
10687
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
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diff changeset
   369
        inc(r);
10691
97f45f1374be change speechfix implementation (no "continue" anymore
sheepluva
parents: 10690
diff changeset
   370
        // read char from source string
10687
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
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diff changeset
   371
        c:= s[p];
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   372
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   373
        // strip empty lines, spaces and newlines on beginnings of line
10691
97f45f1374be change speechfix implementation (no "continue" anymore
sheepluva
parents: 10690
diff changeset
   374
        skip:= ((newl or (p = m)) and ((c = ' ') or (c = ldelim)));
10687
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   375
10691
97f45f1374be change speechfix implementation (no "continue" anymore
sheepluva
parents: 10690
diff changeset
   376
        if (not skip) then
97f45f1374be change speechfix implementation (no "continue" anymore
sheepluva
parents: 10690
diff changeset
   377
            begin
97f45f1374be change speechfix implementation (no "continue" anymore
sheepluva
parents: 10690
diff changeset
   378
            newl:= (c = ldelim);
97f45f1374be change speechfix implementation (no "continue" anymore
sheepluva
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diff changeset
   379
            // stop if we went past the end of the line
97f45f1374be change speechfix implementation (no "continue" anymore
sheepluva
parents: 10690
diff changeset
   380
            if newl then
97f45f1374be change speechfix implementation (no "continue" anymore
sheepluva
parents: 10690
diff changeset
   381
                break;
10687
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   382
10691
97f45f1374be change speechfix implementation (no "continue" anymore
sheepluva
parents: 10690
diff changeset
   383
            // copy current char to output substring
97f45f1374be change speechfix implementation (no "continue" anymore
sheepluva
parents: 10690
diff changeset
   384
            inc(l);
97f45f1374be change speechfix implementation (no "continue" anymore
sheepluva
parents: 10690
diff changeset
   385
            substr[l]:= c;
97f45f1374be change speechfix implementation (no "continue" anymore
sheepluva
parents: 10690
diff changeset
   386
            end;
97f45f1374be change speechfix implementation (no "continue" anymore
sheepluva
parents: 10690
diff changeset
   387
10687
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   388
        end;
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   389
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   390
    inc(startFrom, r);
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   391
10689
692649e341fc change string types of speech bubbles fix to work with pas2c
sheepluva
parents: 10687
diff changeset
   392
    SetLengthA(substr, l);
10687
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   393
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   394
    GetNextSpeechLine:= (l > 0);
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   395
end;
4380
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   396
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   397
function RenderSpeechBubbleTex(s: ansistring; SpeechType: Longword; font: THWFont): PTexture;
10687
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   398
var textWidth, textHeight, x, y, w, h, i, j, pos, line, numLines, edgeWidth, edgeHeight, cornerWidth, cornerHeight: LongInt;
4380
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   399
    finalSurface, tmpsurf, rotatedEdge: PSDL_Surface;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   400
    rect: TSDL_Rect;
10127
7f29a65aa1e4 It compiles \o/
unc0rr
parents: 10116
diff changeset
   401
    {$IFNDEF PAS2C}
4611
445d382cd401 A very very basic snow implementation
nemo
parents: 4404
diff changeset
   402
    chars: set of char = [#9,' ',';',':','?','!',','];
10127
7f29a65aa1e4 It compiles \o/
unc0rr
parents: 10116
diff changeset
   403
    {$ENDIF}
10689
692649e341fc change string types of speech bubbles fix to work with pas2c
sheepluva
parents: 10687
diff changeset
   404
    substr: ansistring;
4380
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   405
    edge, corner, tail: TSPrite;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   406
begin
10139
9046f69dae4c In stats-only mode:
unc0rr
parents: 10127
diff changeset
   407
    if cOnlyStats then exit(nil);
9046f69dae4c In stats-only mode:
unc0rr
parents: 10127
diff changeset
   408
4380
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   409
    case SpeechType of
10142
adb804cb2638 Reduce number of warnings in pas2c-generated code
unc0rr
parents: 10139
diff changeset
   410
        1: begin
10139
9046f69dae4c In stats-only mode:
unc0rr
parents: 10127
diff changeset
   411
            edge:= sprSpeechEdge;
9046f69dae4c In stats-only mode:
unc0rr
parents: 10127
diff changeset
   412
            corner:= sprSpeechCorner;
9046f69dae4c In stats-only mode:
unc0rr
parents: 10127
diff changeset
   413
            tail:= sprSpeechTail;
9046f69dae4c In stats-only mode:
unc0rr
parents: 10127
diff changeset
   414
            end;
10142
adb804cb2638 Reduce number of warnings in pas2c-generated code
unc0rr
parents: 10139
diff changeset
   415
        2: begin
10139
9046f69dae4c In stats-only mode:
unc0rr
parents: 10127
diff changeset
   416
            edge:= sprThoughtEdge;
9046f69dae4c In stats-only mode:
unc0rr
parents: 10127
diff changeset
   417
            corner:= sprThoughtCorner;
9046f69dae4c In stats-only mode:
unc0rr
parents: 10127
diff changeset
   418
            tail:= sprThoughtTail;
9046f69dae4c In stats-only mode:
unc0rr
parents: 10127
diff changeset
   419
            end;
10142
adb804cb2638 Reduce number of warnings in pas2c-generated code
unc0rr
parents: 10139
diff changeset
   420
        3: begin
10139
9046f69dae4c In stats-only mode:
unc0rr
parents: 10127
diff changeset
   421
            edge:= sprShoutEdge;
9046f69dae4c In stats-only mode:
unc0rr
parents: 10127
diff changeset
   422
            corner:= sprShoutCorner;
9046f69dae4c In stats-only mode:
unc0rr
parents: 10127
diff changeset
   423
            tail:= sprShoutTail;
10142
adb804cb2638 Reduce number of warnings in pas2c-generated code
unc0rr
parents: 10139
diff changeset
   424
            end
adb804cb2638 Reduce number of warnings in pas2c-generated code
unc0rr
parents: 10139
diff changeset
   425
        else
adb804cb2638 Reduce number of warnings in pas2c-generated code
unc0rr
parents: 10139
diff changeset
   426
            exit(nil)
4380
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   427
        end;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   428
    edgeHeight:= SpritesData[edge].Height;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   429
    edgeWidth:= SpritesData[edge].Width;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   430
    cornerWidth:= SpritesData[corner].Width;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   431
    cornerHeight:= SpritesData[corner].Height;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   432
    // This one screws up WrapText
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   433
    //s:= 'This is the song that never ends.  ''cause it goes on and on my friends. Some people, started singing it not knowing what it was. And they''ll just go on singing it forever just because... This is the song that never ends...';
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   434
    // This one does not
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   435
    //s:= 'This is the song that never ends.  cause it goes on and on my friends. Some people, started singing it not knowing what it was. And they will go on singing it forever just because... This is the song that never ends... ';
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   436
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   437
    numLines:= 0;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   438
6580
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 6286
diff changeset
   439
    if length(s) = 0 then
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 6286
diff changeset
   440
        s:= '...';
4380
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   441
    font:= CheckCJKFont(s, font);
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   442
    w:= 0; h:= 0; // avoid compiler hints
10127
7f29a65aa1e4 It compiles \o/
unc0rr
parents: 10116
diff changeset
   443
    TTF_SizeUTF8(Fontz[font].Handle, PChar(s), @w, @h);
6580
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 6286
diff changeset
   444
    if w<8 then
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 6286
diff changeset
   445
        w:= 8;
4380
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   446
    j:= 0;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   447
    if (length(s) > 20) then
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   448
        begin
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   449
        w:= 0;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   450
        i:= round(Sqrt(length(s)) * 2);
10127
7f29a65aa1e4 It compiles \o/
unc0rr
parents: 10116
diff changeset
   451
        {$IFNDEF PAS2C}
4380
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   452
        s:= WrapText(s, #1, chars, i);
10127
7f29a65aa1e4 It compiles \o/
unc0rr
parents: 10116
diff changeset
   453
        {$ENDIF}
10687
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   454
        pos:= 1; line:= 0;
4380
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   455
    // Find the longest line for the purposes of centring the text.  Font dependant.
10687
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   456
        while GetNextSpeechLine(s, #1, pos, substr) do
4380
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   457
            begin
10687
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   458
            inc(numLines);
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   459
            i:= 0; j:= 0;
10689
692649e341fc change string types of speech bubbles fix to work with pas2c
sheepluva
parents: 10687
diff changeset
   460
            TTF_SizeUTF8(Fontz[font].Handle, PChar(substr), @i, @j);
10687
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   461
            if i > w then
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   462
                w:= i;
4380
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   463
            end;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   464
        end
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   465
    else numLines := 1;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   466
10687
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   467
    if numLines < 1 then
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   468
        begin
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   469
        s:= '...';
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   470
        numLines:= 1;
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   471
        end;
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   472
4380
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   473
    textWidth:=((w-(cornerWidth-edgeWidth)*2) div edgeWidth)*edgeWidth+edgeWidth;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   474
    textHeight:=(((numlines * h + 2)-((cornerHeight-edgeWidth)*2)) div edgeWidth)*edgeWidth;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   475
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   476
    textHeight:=max(textHeight,edgeWidth);
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   477
    //textWidth:=max(textWidth,SpritesData[tail].Width);
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   478
    rect.x:= 0;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   479
    rect.y:= 0;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   480
    rect.w:= textWidth + (cornerWidth * 2);
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   481
    rect.h:= textHeight + cornerHeight*2 - edgeHeight + SpritesData[tail].Height;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   482
    //s:= inttostr(w) + ' ' + inttostr(numlines) + ' ' + inttostr(rect.x) + ' '+inttostr(rect.y) + ' ' + inttostr(rect.w) + ' ' + inttostr(rect.h);
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   483
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   484
    finalSurface:= SDL_CreateRGBSurface(SDL_SWSURFACE, rect.w, rect.h, 32, RMask, GMask, BMask, AMask);
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   485
11537
bf86c6cb9341 Bye-bye TryDo
unc0rr
parents: 11512
diff changeset
   486
    if checkFails(finalSurface <> nil, 'RenderString: fail to create surface', true) then
bf86c6cb9341 Bye-bye TryDo
unc0rr
parents: 11512
diff changeset
   487
        exit(nil);
4380
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   488
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   489
    //////////////////////////////// CORNERS ///////////////////////////////
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   490
    copyToXY(SpritesData[corner].Surface, finalSurface, 0, 0); /////////////////// NW
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   491
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   492
    flipSurface(SpritesData[corner].Surface, true); // store all 4 versions in memory to avoid repeated flips?
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   493
    x:= 0;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   494
    y:= textHeight + cornerHeight -1;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   495
    copyToXY(SpritesData[corner].Surface, finalSurface, x, y); /////////////////// SW
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   496
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   497
    flipSurface(SpritesData[corner].Surface, false);
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   498
    x:= rect.w-cornerWidth-1;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   499
    y:= textHeight + cornerHeight -1;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   500
    copyToXY(SpritesData[corner].Surface, finalSurface, x, y); /////////////////// SE
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   501
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   502
    flipSurface(SpritesData[corner].Surface, true);
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   503
    x:= rect.w-cornerWidth-1;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   504
    y:= 0;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   505
    copyToXY(SpritesData[corner].Surface, finalSurface, x, y); /////////////////// NE
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   506
    flipSurface(SpritesData[corner].Surface, false); // restore original position
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   507
    //////////////////////////////// END CORNERS ///////////////////////////////
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   508
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   509
    //////////////////////////////// EDGES //////////////////////////////////////
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   510
    x:= cornerWidth;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   511
    y:= 0;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   512
    while x < rect.w-cornerWidth-1 do
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   513
        begin
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   514
        copyToXY(SpritesData[edge].Surface, finalSurface, x, y); ///////////////// top edge
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   515
        inc(x,edgeWidth);
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   516
        end;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   517
    flipSurface(SpritesData[edge].Surface, true);
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   518
    x:= cornerWidth;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   519
    y:= textHeight + cornerHeight*2 - edgeHeight-1;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   520
    while x < rect.w-cornerWidth-1 do
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   521
        begin
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   522
        copyToXY(SpritesData[edge].Surface, finalSurface, x, y); ///////////////// bottom edge
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   523
        inc(x,edgeWidth);
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   524
        end;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   525
    flipSurface(SpritesData[edge].Surface, true); // restore original position
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   526
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   527
    rotatedEdge:= SDL_CreateRGBSurface(SDL_SWSURFACE, edgeHeight, edgeWidth, 32, RMask, GMask, BMask, AMask);
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   528
    x:= rect.w - edgeHeight - 1;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   529
    y:= cornerHeight;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   530
    //// initially was going to rotate in place, but the SDL spec claims width/height are read only
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   531
    copyRotatedSurface(SpritesData[edge].Surface,rotatedEdge);
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   532
    while y < textHeight + cornerHeight do
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   533
        begin
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   534
        copyToXY(rotatedEdge, finalSurface, x, y);
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   535
        inc(y,edgeWidth);
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   536
        end;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   537
    flipSurface(rotatedEdge, false); // restore original position
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   538
    x:= 0;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   539
    y:= cornerHeight;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   540
    while y < textHeight + cornerHeight do
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   541
        begin
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   542
        copyToXY(rotatedEdge, finalSurface, x, y);
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   543
        inc(y,edgeWidth);
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   544
        end;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   545
    //////////////////////////////// END EDGES //////////////////////////////////////
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   546
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   547
    x:= cornerWidth;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   548
    y:= textHeight + cornerHeight * 2 - edgeHeight - 1;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   549
    copyToXY(SpritesData[tail].Surface, finalSurface, x, y);
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   550
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   551
    rect.x:= edgeHeight;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   552
    rect.y:= edgeHeight;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   553
    rect.w:= rect.w - edgeHeight * 2;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   554
    rect.h:= textHeight + cornerHeight * 2 - edgeHeight * 2;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   555
    i:= rect.w;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   556
    j:= rect.h;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   557
    SDL_FillRect(finalSurface, @rect, cWhiteColor);
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   558
10687
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   559
    pos:= 1; line:= 0;
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   560
    while GetNextSpeechLine(s, #1, pos, substr) do
4380
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   561
        begin
10689
692649e341fc change string types of speech bubbles fix to work with pas2c
sheepluva
parents: 10687
diff changeset
   562
        tmpsurf:= TTF_RenderUTF8_Blended(Fontz[Font].Handle, PChar(substr), cNearBlackColorChannels);
10687
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   563
        rect.x:= edgeHeight + 1 + ((i - w) div 2);
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   564
        // trying to more evenly position the text, vertically
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   565
        rect.y:= edgeHeight + ((j-(numLines*h)) div 2) + line * h;
11512
bd9a2f1b0080 SDLTry doesn't halt engine no more
unc0rr
parents: 11342
diff changeset
   566
        if not SDLCheck(tmpsurf <> nil, 'TTF_RenderUTF8_Blended', true) then
bd9a2f1b0080 SDLTry doesn't halt engine no more
unc0rr
parents: 11342
diff changeset
   567
        begin
bd9a2f1b0080 SDLTry doesn't halt engine no more
unc0rr
parents: 11342
diff changeset
   568
            SDL_UpperBlit(tmpsurf, nil, finalSurface, @rect);
bd9a2f1b0080 SDLTry doesn't halt engine no more
unc0rr
parents: 11342
diff changeset
   569
            SDL_FreeSurface(tmpsurf);
bd9a2f1b0080 SDLTry doesn't halt engine no more
unc0rr
parents: 11342
diff changeset
   570
        end;
10687
2e921409b5b1 cleanup speech bubble code a little. this fixes issue 719
sheepluva
parents: 10494
diff changeset
   571
        inc(line);
4380
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   572
        end;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   573
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   574
    RenderSpeechBubbleTex:= Surface2Tex(finalSurface, true);
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   575
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   576
    SDL_FreeSurface(rotatedEdge);
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   577
    SDL_FreeSurface(finalSurface);
8026
4a4f21070479 merge xymeng's gsoc engine with a few updates (and further checks on symbol definitions)
koda
parents: 7546
diff changeset
   578
4380
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   579
end;
b78638b36b89 Introduce uRenderUtils
unC0Rr
parents:
diff changeset
   580
4611
445d382cd401 A very very basic snow implementation
nemo
parents: 4404
diff changeset
   581
end.