(*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2004-2014 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 *)

{$INCLUDE "options.inc"}

unit uRenderUtils;

interface

uses SDLh, uTypes;

procedure flipSurface(Surface: PSDL_Surface; Vertical: Boolean);

procedure copyRotatedSurface(src, dest: PSDL_Surface); // this is necessary since width/height are read only in SDL

procedure copyToXY(src, dest: PSDL_Surface; destX, destY: LongInt); inline;

procedure copyToXYFromRect(src, dest: PSDL_Surface; srcX, srcY, srcW, srcH, destX, destY: LongInt);

procedure DrawSprite2Surf(sprite: TSprite; dest: PSDL_Surface; x,y: LongInt); inline;

procedure DrawSpriteFrame2Surf(sprite: TSprite; dest: PSDL_Surface; x,y: LongInt; frame: LongInt);

procedure DrawLine2Surf(dest: PSDL_Surface; x0,y0,x1,y1:LongInt; r,g,b: byte);

procedure DrawRoundRect(rect: PSDL_Rect; BorderColor, FillColor: Longword; Surface: PSDL_Surface; Clear: boolean);

function  RenderStringTex(s: ansistring; Color: Longword; font: THWFont): PTexture;

function  RenderStringTexLim(s: ansistring; Color: Longword; font: THWFont; maxLength: LongWord): PTexture;

function  RenderSpeechBubbleTex(s: ansistring; SpeechType: Longword; font: THWFont): PTexture;

implementation

uses uUtils, uVariables, uConsts, uTextures, SysUtils, uDebug;

procedure DrawRoundRect(rect: PSDL_Rect; BorderColor, FillColor: Longword; Surface: PSDL_Surface; Clear: boolean);

var r: TSDL_Rect;

begin

    r:= rect^;

    if Clear then

        SDL_FillRect(Surface, @r, 0);

    BorderColor:= SDL_MapRGB(Surface^.format, BorderColor shr 16, BorderColor shr 8, BorderColor and $FF);

    FillColor:= SDL_MapRGB(Surface^.format, FillColor shr 16, FillColor shr 8, FillColor and $FF);

    r.y:= rect^.y + 1;

    r.h:= rect^.h - 2;

    SDL_FillRect(Surface, @r, BorderColor);

    r.x:= rect^.x + 1;

    r.w:= rect^.w - 2;

    r.y:= rect^.y;

    r.h:= rect^.h;

    SDL_FillRect(Surface, @r, BorderColor);

    r.x:= rect^.x + 2;

    r.y:= rect^.y + 1;

    r.w:= rect^.w - 4;

    r.h:= rect^.h - 2;

    SDL_FillRect(Surface, @r, FillColor);

    r.x:= rect^.x + 1;

    r.y:= rect^.y + 2;

    r.w:= rect^.w - 2;

    r.h:= rect^.h - 4;

    SDL_FillRect(Surface, @r, FillColor);

end;

(*

function WriteInRoundRect(Surface: PSDL_Surface; X, Y: LongInt; Color: LongWord; Font: THWFont; s: ansistring): TSDL_Rect;

begin

    WriteInRoundRect:= WriteInRoundRect(Surface, X, Y, Color, Font, s, 0);

end;*)

function WriteInRoundRect(Surface: PSDL_Surface; X, Y: LongInt; Color: LongWord; Font: THWFont; s: ansistring; maxLength: LongWord): TSDL_Rect;

var w, h: LongInt;

    tmpsurf: PSDL_Surface;

    clr: TSDL_Color;

    finalRect, textRect: TSDL_Rect;

begin

    if (maxLength <> 0) and (w > maxLength) then w := maxLength;

    finalRect.x:= X;

    finalRect.y:= Y;

    finalRect.w:= w + cFontBorder * 2 + 4;

    finalRect.h:= h + cFontBorder * 2;

    textRect.x:= X;

    textRect.y:= Y;

    textRect.w:= w;

    textRect.h:= h;

    DrawRoundRect(@finalRect, cWhiteColor, cNearBlackColor, Surface, true);

    clr.r:= (Color shr 16) and $FF;

    clr.g:= (Color shr 8) and $FF;

    clr.b:= Color and $FF;

    finalRect.x:= X + cFontBorder + 2;

    finalRect.y:= Y + cFontBorder;

    SDLTry(tmpsurf <> nil, true);

    SDL_UpperBlit(tmpsurf, @textRect, Surface, @finalRect);

    SDL_FreeSurface(tmpsurf);

    finalRect.x:= X;

    finalRect.y:= Y;

    finalRect.w:= w + cFontBorder * 2 + 4;

    finalRect.h:= h + cFontBorder * 2;

    WriteInRoundRect:= finalRect;

end;

procedure flipSurface(Surface: PSDL_Surface; Vertical: Boolean);

var y, x, i, j: LongInt;

    tmpPixel: Longword;

    pixels: PLongWordArray;

begin

    TryDo(Surface^.format^.BytesPerPixel = 4, 'flipSurface failed, expecting 32 bit surface', true);

    SDL_LockSurface(Surface);

    pixels:= Surface^.pixels;

    if Vertical then

    for y := 0 to (Surface^.h div 2) - 1 do

        for x := 0 to Surface^.w - 1 do

            begin

            i:= y * Surface^.w + x;

            j:= (Surface^.h - y - 1) * Surface^.w + x;

            tmpPixel:= pixels^[i];

            pixels^[i]:= pixels^[j];

            pixels^[j]:= tmpPixel;

            end

    else

    for x := 0 to (Surface^.w div 2) - 1 do

        for y := 0 to Surface^.h -1 do

            begin

            i:= y*Surface^.w + x;

            j:= y*Surface^.w + (Surface^.w - x - 1);

            tmpPixel:= pixels^[i];

            pixels^[i]:= pixels^[j];

            pixels^[j]:= tmpPixel;

            end;

    SDL_UnlockSurface(Surface);

end;

procedure copyToXY(src, dest: PSDL_Surface; destX, destY: LongInt); inline;

begin

    copyToXYFromRect(src, dest, 0, 0, src^.w, src^.h, destX, destY);

end;

procedure copyToXYFromRect(src, dest: PSDL_Surface; srcX, srcY, srcW, srcH, destX, destY: LongInt);

var i, j, maxDest, maxSrc, iX, iY: LongInt;

    srcPixels, destPixels: PLongWordArray;

    r0, g0, b0, a0, r1, g1, b1, a1: Byte;

begin

    maxDest:= (dest^.pitch div 4) * dest^.h;

    maxSrc:= (src^.pitch div 4) * src^.h;

    SDL_LockSurface(src);

    SDL_LockSurface(dest);

    srcPixels:= src^.pixels;

    destPixels:= dest^.pixels;

    for iX:= 0 to srcW - 1 do

    for iY:= 0 to srcH - 1 do

        begin

        i:= (destY + iY) * (dest^.pitch div 4) + (destX + iX);

        j:= (srcY  + iY) * (src^.pitch  div 4) + (srcX  + iX);

        if (i < maxDest) and (j < maxSrc) and (srcPixels^[j] and AMask <> 0) then

            begin

            SDL_GetRGBA(destPixels^[i], dest^.format, @r0, @g0, @b0, @a0);

            SDL_GetRGBA(srcPixels^[j], src^.format, @r1, @g1, @b1, @a1);

            r0:= (r0 * (255 - LongInt(a1)) + r1 * LongInt(a1)) div 255;

            g0:= (g0 * (255 - LongInt(a1)) + g1 * LongInt(a1)) div 255;

            b0:= (b0 * (255 - LongInt(a1)) + b1 * LongInt(a1)) div 255;

            a0:= (a0 * (255 - LongInt(a1)) + a1 * LongInt(a1)) div 255;

            destPixels^[i]:= SDL_MapRGBA(dest^.format, r0, g0, b0, a0);

            end;

        end;

    SDL_UnlockSurface(src);

    SDL_UnlockSurface(dest);

end;

procedure DrawSprite2Surf(sprite: TSprite; dest: PSDL_Surface; x,y: LongInt); inline;

begin

    DrawSpriteFrame2Surf(sprite, dest, x, y, 0);

end;

procedure DrawSpriteFrame2Surf(sprite: TSprite; dest: PSDL_Surface; x,y,frame: LongInt);

var numFramesFirstCol, row, col: LongInt;

begin

    numFramesFirstCol:= SpritesData[sprite].imageHeight div SpritesData[sprite].Height;

    row:= Frame mod numFramesFirstCol;

    col:= Frame div numFramesFirstCol;

    copyToXYFromRect(SpritesData[sprite].Surface, dest,

             col*SpritesData[sprite].Width,

             row*SpritesData[sprite].Height,

             SpritesData[sprite].Width,

             spritesData[sprite].Height,

             x,y);

end;

procedure DrawLine2Surf(dest: PSDL_Surface; x0, y0,x1,y1: LongInt; r,g,b: byte);

var

    dx,dy,err,e2,sx,sy: LongInt;

    yMax: LongInt;

    destPixels: PLongwordArray;

begin

    //max:= (dest^.pitch div 4) * dest^.h;

    yMax:= dest^.pitch div 4;

    SDL_LockSurface(dest);

    destPixels:= dest^.pixels;

    dx:= abs(x1-x0);

    dy:= abs(y1-y0);

    if x0 < x1 then sx:= 1 else sx:= -1;

    if y0 < y1 then sy:= 1 else sy:= -1;

    err:= dx-dy;

    while(true) do

        begin

        destPixels^[(y0 * yMax) + x0]:= SDL_MapRGB(dest^.format, r,g,b); //But will it blend? no

        if (x0 = x1) and (y0 = y1) then break;

        e2:= 2*err;

        if e2 > -dy then

            begin

            err:= err - dy;

            x0 := x0 + sx;

            end;

        if e2 < dx then

            begin

            err:= err + dx;

            y0:=y0+sy

            end;

        end;

    SDL_UnlockSurface(dest);

end;

procedure copyRotatedSurface(src, dest: PSDL_Surface); // this is necessary since width/height are read only in SDL, apparently

var y, x, i, j: LongInt;

    srcPixels, destPixels: PLongWordArray;

begin

    TryDo(src^.format^.BytesPerPixel = 4, 'rotateSurface failed, expecting 32 bit surface', true);

    TryDo(dest^.format^.BytesPerPixel = 4, 'rotateSurface failed, expecting 32 bit surface', true);

    SDL_LockSurface(src);

    SDL_LockSurface(dest);

    srcPixels:= src^.pixels;

    destPixels:= dest^.pixels;

    j:= 0;

    for x := 0 to src^.w - 1 do

        for y := 0 to src^.h - 1 do

            begin

            i:= (src^.h - 1 - y) * (src^.pitch div 4) + x;

            destPixels^[j]:= srcPixels^[i];

            inc(j)

            end;

    SDL_UnlockSurface(src);

    SDL_UnlockSurface(dest);

end;

function RenderStringTex(s: ansistring; Color: Longword; font: THWFont): PTexture;

begin

    RenderStringTex:= RenderStringTexLim(s, Color, font, 0);

end;

function RenderStringTexLim(s: ansistring; Color: Longword; font: THWFont; maxLength: LongWord): PTexture;

var w, h: LongInt;

    finalSurface: PSDL_Surface;

begin

    if length(s) = 0 then s:= _S' ';

    font:= CheckCJKFont(s, font);

    w:= 0; h:= 0; // avoid compiler hints

    if (maxLength <> 0) and (w > maxLength) then w := maxLength;

    finalSurface:= SDL_CreateRGBSurface(SDL_SWSURFACE, w + cFontBorder * 2 + 4, h + cFontBorder * 2,

            32, RMask, GMask, BMask, AMask);

    TryDo(finalSurface <> nil, 'RenderString: fail to create surface', true);

    WriteInRoundRect(finalSurface, 0, 0, Color, font, s, maxLength);

    TryDo(SDL_SetColorKey(finalSurface, SDL_SRCCOLORKEY, 0) = 0, errmsgTransparentSet, true);

    RenderStringTexLim:= Surface2Tex(finalSurface, false);

    SDL_FreeSurface(finalSurface);

end;

function RenderSpeechBubbleTex(s: ansistring; SpeechType: Longword; font: THWFont): PTexture;

var textWidth, textHeight, x, y, w, h, i, j, pos, prevpos, line, numLines, edgeWidth, edgeHeight, cornerWidth, cornerHeight: LongInt;

    finalSurface, tmpsurf, rotatedEdge: PSDL_Surface;

    rect: TSDL_Rect;

    chars: set of char = [#9,' ',';',':','?','!',','];

    substr: shortstring;

    edge, corner, tail: TSPrite;

begin

      case SpeechType of

        1: begin;

        edge:= sprSpeechEdge;

        corner:= sprSpeechCorner;

        tail:= sprSpeechTail;

        end;

        2: begin;

        edge:= sprThoughtEdge;

        corner:= sprThoughtCorner;

        tail:= sprThoughtTail;

        end;

        3: begin;

        edge:= sprShoutEdge;

        corner:= sprShoutCorner;

        tail:= sprShoutTail;

        end;

        end;

    edgeHeight:= SpritesData[edge].Height;

    edgeWidth:= SpritesData[edge].Width;

    cornerWidth:= SpritesData[corner].Width;

    cornerHeight:= SpritesData[corner].Height;

    // This one screws up WrapText

    //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...';

    // This one does not

    //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... ';

    numLines:= 0;

    if length(s) = 0 then

        s:= '...';

    font:= CheckCJKFont(s, font);

    w:= 0; h:= 0; // avoid compiler hints

    if w<8 then

        w:= 8;

    j:= 0;

    if (length(s) > 20) then

        begin

        w:= 0;

        i:= round(Sqrt(length(s)) * 2);

        s:= WrapText(s, #1, chars, i);

        pos:= 1; prevpos:= 0; line:= 0;

    // Find the longest line for the purposes of centring the text.  Font dependant.

        while pos <= length(s) do

            begin

            if (s[pos] = #1) or (pos = length(s)) then

                begin

                inc(numlines);

                if s[pos] <> #1 then inc(pos);

                while s[prevpos+1] = ' ' do inc(prevpos);

                substr:= copy(s, prevpos+1, pos-prevpos-1);

                i:= 0; j:= 0;

                TTF_SizeUTF8(Fontz[font].Handle, Str2PChar(substr), @i, @j);

                if i > w then

                    w:= i;

                prevpos:= pos;

                end;

            inc(pos);

            end;

        end

    else numLines := 1;

    textWidth:=((w-(cornerWidth-edgeWidth)*2) div edgeWidth)*edgeWidth+edgeWidth;

    textHeight:=(((numlines * h + 2)-((cornerHeight-edgeWidth)*2)) div edgeWidth)*edgeWidth;

    textHeight:=max(textHeight,edgeWidth);

    //textWidth:=max(textWidth,SpritesData[tail].Width);

    rect.x:= 0;

    rect.y:= 0;

    rect.w:= textWidth + (cornerWidth * 2);

    rect.h:= textHeight + cornerHeight*2 - edgeHeight + SpritesData[tail].Height;

    //s:= inttostr(w) + ' ' + inttostr(numlines) + ' ' + inttostr(rect.x) + ' '+inttostr(rect.y) + ' ' + inttostr(rect.w) + ' ' + inttostr(rect.h);

    finalSurface:= SDL_CreateRGBSurface(SDL_SWSURFACE, rect.w, rect.h, 32, RMask, GMask, BMask, AMask);

    TryDo(finalSurface <> nil, 'RenderString: fail to create surface', true);

    //////////////////////////////// CORNERS ///////////////////////////////

    copyToXY(SpritesData[corner].Surface, finalSurface, 0, 0); /////////////////// NW

    flipSurface(SpritesData[corner].Surface, true); // store all 4 versions in memory to avoid repeated flips?

    x:= 0;

    y:= textHeight + cornerHeight -1;

    copyToXY(SpritesData[corner].Surface, finalSurface, x, y); /////////////////// SW

    flipSurface(SpritesData[corner].Surface, false);

    x:= rect.w-cornerWidth-1;

    y:= textHeight + cornerHeight -1;

    copyToXY(SpritesData[corner].Surface, finalSurface, x, y); /////////////////// SE

    flipSurface(SpritesData[corner].Surface, true);

    x:= rect.w-cornerWidth-1;

    y:= 0;

    copyToXY(SpritesData[corner].Surface, finalSurface, x, y); /////////////////// NE

    flipSurface(SpritesData[corner].Surface, false); // restore original position

    //////////////////////////////// END CORNERS ///////////////////////////////

    //////////////////////////////// EDGES //////////////////////////////////////

    x:= cornerWidth;

    y:= 0;

    while x < rect.w-cornerWidth-1 do

        begin

        copyToXY(SpritesData[edge].Surface, finalSurface, x, y); ///////////////// top edge

        inc(x,edgeWidth);

        end;

    flipSurface(SpritesData[edge].Surface, true);

    x:= cornerWidth;

    y:= textHeight + cornerHeight*2 - edgeHeight-1;

    while x < rect.w-cornerWidth-1 do

        begin

        copyToXY(SpritesData[edge].Surface, finalSurface, x, y); ///////////////// bottom edge

        inc(x,edgeWidth);

        end;

    flipSurface(SpritesData[edge].Surface, true); // restore original position

    rotatedEdge:= SDL_CreateRGBSurface(SDL_SWSURFACE, edgeHeight, edgeWidth, 32, RMask, GMask, BMask, AMask);

    x:= rect.w - edgeHeight - 1;

    y:= cornerHeight;

    //// initially was going to rotate in place, but the SDL spec claims width/height are read only

    copyRotatedSurface(SpritesData[edge].Surface,rotatedEdge);

    while y < textHeight + cornerHeight do

        begin

        copyToXY(rotatedEdge, finalSurface, x, y);

        inc(y,edgeWidth);

        end;

    flipSurface(rotatedEdge, false); // restore original position

    x:= 0;

    y:= cornerHeight;

    while y < textHeight + cornerHeight do

        begin

        copyToXY(rotatedEdge, finalSurface, x, y);

        inc(y,edgeWidth);

        end;

    //////////////////////////////// END EDGES //////////////////////////////////////

    x:= cornerWidth;

    y:= textHeight + cornerHeight * 2 - edgeHeight - 1;

    copyToXY(SpritesData[tail].Surface, finalSurface, x, y);

    rect.x:= edgeHeight;

    rect.y:= edgeHeight;

    rect.w:= rect.w - edgeHeight * 2;

    rect.h:= textHeight + cornerHeight * 2 - edgeHeight * 2;

    i:= rect.w;

    j:= rect.h;

    SDL_FillRect(finalSurface, @rect, cWhiteColor);

    pos:= 1; prevpos:= 0; line:= 0;

    while pos <= length(s) do

        begin

        if (s[pos] = #1) or (pos = length(s)) then

            begin

            if s[pos] <> #1 then

                inc(pos);

            while s[prevpos+1] = ' 'do

                inc(prevpos);

            substr:= copy(s, prevpos+1, pos-prevpos-1);

            if Length(substr) <> 0 then

                begin

                tmpsurf:= TTF_RenderUTF8_Blended(Fontz[Font].Handle, Str2PChar(substr), cNearBlackColorChannels);

                rect.x:= edgeHeight + 1 + ((i - w) div 2);

                // trying to more evenly position the text, vertically

                rect.y:= edgeHeight + ((j-(numLines*h)) div 2) + line * h;

                SDLTry(tmpsurf <> nil, true);

                SDL_UpperBlit(tmpsurf, nil, finalSurface, @rect);

                SDL_FreeSurface(tmpsurf);

                inc(line);

                prevpos:= pos;

                end;

                end;

        inc(pos);

        end;

    RenderSpeechBubbleTex:= Surface2Tex(finalSurface, true);

    SDL_FreeSurface(rotatedEdge);

    SDL_FreeSurface(finalSurface);

end;

end.