hedgewars/uRender.pas
author nemo
Thu, 04 Apr 2013 08:10:59 -0400
changeset 8848 e9ebd63f8a03
parent 8626 cfc44db21d72
child 8833 c13ebed437cb
child 9080 9b42757d7e71
permissions -rw-r--r--
So. Some themes have objects that seem to be large natural extensions of the landscape. Masks allow maintaining that. Lemme know if it doesn't look good. If it doesn't, can still use for ice/bounce/indestructible. Indestructible bunker object for example.

(*
 * Hedgewars, a free turn based strategy game
 * Copyright (c) 2004-2012 Andrey Korotaev <unC0Rr@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 *)

{$INCLUDE "options.inc"}

unit uRender;

interface

uses SDLh, uTypes, GLunit, uConsts;

procedure DrawSprite            (Sprite: TSprite; X, Y, Frame: LongInt);
procedure DrawSprite            (Sprite: TSprite; X, Y, FrameX, FrameY: LongInt);
procedure DrawSpriteFromRect    (Sprite: TSprite; r: TSDL_Rect; X, Y, Height, Position: LongInt); inline;
procedure DrawSpriteClipped     (Sprite: TSprite; X, Y, TopY, RightX, BottomY, LeftX: LongInt);
procedure DrawSpriteRotated     (Sprite: TSprite; X, Y, Dir: LongInt; Angle: real);
procedure DrawSpriteRotatedF    (Sprite: TSprite; X, Y, Frame, Dir: LongInt; Angle: real);

procedure DrawTexture           (X, Y: LongInt; Texture: PTexture); inline;
procedure DrawTexture           (X, Y: LongInt; Texture: PTexture; Scale: GLfloat);
procedure DrawTextureFromRect   (X, Y: LongInt; r: PSDL_Rect; SourceTexture: PTexture); inline;
procedure DrawTextureFromRect   (X, Y, W, H: LongInt; r: PSDL_Rect; SourceTexture: PTexture); inline;
procedure DrawTextureFromRectDir(X, Y, W, H: LongInt; r: PSDL_Rect; SourceTexture: PTexture; Dir: LongInt);
procedure DrawTextureCentered   (X, Top: LongInt; Source: PTexture);
procedure DrawTextureF          (Texture: PTexture; Scale: GLfloat; X, Y, Frame, Dir, w, h: LongInt);
procedure DrawTextureRotated    (Texture: PTexture; hw, hh, X, Y, Dir: LongInt; Angle: real);
procedure DrawTextureRotatedF   (Texture: PTexture; Scale, OffsetX, OffsetY: GLfloat; X, Y, Frame, Dir, w, h: LongInt; Angle: real);

procedure DrawCircle            (X, Y, Radius, Width: LongInt);
procedure DrawCircle            (X, Y, Radius, Width: LongInt; r, g, b, a: Byte);

procedure DrawLine              (X0, Y0, X1, Y1, Width: Single; r, g, b, a: Byte);
procedure DrawFillRect          (r: TSDL_Rect);
procedure DrawHedgehog          (X, Y: LongInt; Dir: LongInt; Pos, Step: LongWord; Angle: real);
procedure DrawScreenWidget      (widget: POnScreenWidget);

procedure Tint                  (r, g, b, a: Byte); inline;
procedure Tint                  (c: Longword); inline;


implementation
uses uVariables;

{$IFDEF USE_TOUCH_INTERFACE}
const
    FADE_ANIM_TIME = 500;
    MOVE_ANIM_TIME = 500;
{$ENDIF}

var LastTint: LongWord = 0;

procedure DrawSpriteFromRect(Sprite: TSprite; r: TSDL_Rect; X, Y, Height, Position: LongInt); inline;
begin
r.y:= r.y + Height * Position;
r.h:= Height;
DrawTextureFromRect(X, Y, @r, SpritesData[Sprite].Texture)
end;

procedure DrawTextureFromRect(X, Y: LongInt; r: PSDL_Rect; SourceTexture: PTexture); inline;
begin
DrawTextureFromRectDir(X, Y, r^.w, r^.h, r, SourceTexture, 1)
end;
procedure DrawTextureFromRect(X, Y, W, H: LongInt; r: PSDL_Rect; SourceTexture: PTexture); inline;
begin
DrawTextureFromRectDir(X, Y, W, H, r, SourceTexture, 1)
end;

procedure DrawTextureFromRectDir(X, Y, W, H: LongInt; r: PSDL_Rect; SourceTexture: PTexture; Dir: LongInt);
var rr: TSDL_Rect;
    _l, _r, _t, _b: real;
    VertexBuffer, TextureBuffer: array [0..3] of TVertex2f;
begin
if (SourceTexture^.h = 0) or (SourceTexture^.w = 0) then
    exit;

// do not draw anything outside the visible screen space (first check fixes some sprite drawing, e.g. hedgehogs)
if (abs(X) > W) and ((abs(X + W / 2) - W / 2) > cScreenWidth / cScaleFactor) then
    exit;
if (abs(Y) > H) and ((abs(Y + H / 2 - (0.5 * cScreenHeight)) - H / 2) > cScreenHeight / cScaleFactor) then
    exit;

rr.x:= X;
rr.y:= Y;
rr.w:= W;
rr.h:= H;

_l:= r^.x / SourceTexture^.w * SourceTexture^.rx;
_r:= (r^.x + r^.w) / SourceTexture^.w * SourceTexture^.rx;
_t:= r^.y / SourceTexture^.h * SourceTexture^.ry;
_b:= (r^.y + r^.h) / SourceTexture^.h * SourceTexture^.ry;

glBindTexture(GL_TEXTURE_2D, SourceTexture^.id);

if Dir < 0 then
    begin
    VertexBuffer[0].X:= X + rr.w/2;
    VertexBuffer[0].Y:= Y;
    VertexBuffer[1].X:= X - rr.w/2;
    VertexBuffer[1].Y:= Y;
    VertexBuffer[2].X:= X - rr.w/2;
    VertexBuffer[2].Y:= rr.h + Y;
    VertexBuffer[3].X:= X + rr.w/2;
    VertexBuffer[3].Y:= rr.h + Y;
    end
else
    begin
    VertexBuffer[0].X:= X;
    VertexBuffer[0].Y:= Y;
    VertexBuffer[1].X:= rr.w + X;
    VertexBuffer[1].Y:= Y;
    VertexBuffer[2].X:= rr.w + X;
    VertexBuffer[2].Y:= rr.h + Y;
    VertexBuffer[3].X:= X;
    VertexBuffer[3].Y:= rr.h + Y;
    end;

TextureBuffer[0].X:= _l;
TextureBuffer[0].Y:= _t;
TextureBuffer[1].X:= _r;
TextureBuffer[1].Y:= _t;
TextureBuffer[2].X:= _r;
TextureBuffer[2].Y:= _b;
TextureBuffer[3].X:= _l;
TextureBuffer[3].Y:= _b;

glVertexPointer(2, GL_FLOAT, 0, @VertexBuffer[0]);
glTexCoordPointer(2, GL_FLOAT, 0, @TextureBuffer[0]);
glDrawArrays(GL_TRIANGLE_FAN, 0, Length(VertexBuffer));
end;

procedure DrawTexture(X, Y: LongInt; Texture: PTexture); inline;
begin
    DrawTexture(X, Y, Texture, 1.0);
end;

procedure DrawTexture(X, Y: LongInt; Texture: PTexture; Scale: GLfloat);
begin

glPushMatrix;
glTranslatef(X, Y, 0);
glScalef(Scale, Scale, 1);

glBindTexture(GL_TEXTURE_2D, Texture^.id);

glVertexPointer(2, GL_FLOAT, 0, @Texture^.vb);
glTexCoordPointer(2, GL_FLOAT, 0, @Texture^.tb);
glDrawArrays(GL_TRIANGLE_FAN, 0, Length(Texture^.vb));

glPopMatrix
end;

procedure DrawTextureF(Texture: PTexture; Scale: GLfloat; X, Y, Frame, Dir, w, h: LongInt);
begin
    DrawTextureRotatedF(Texture, Scale, 0, 0, X, Y, Frame, Dir, w, h, 0)
end;

procedure DrawTextureRotatedF(Texture: PTexture; Scale, OffsetX, OffsetY: GLfloat; X, Y, Frame, Dir, w, h: LongInt; Angle: real);
var ft, fb, fl, fr: GLfloat;
    hw, nx, ny: LongInt;
    VertexBuffer, TextureBuffer: array [0..3] of TVertex2f;
begin
// do not draw anything outside the visible screen space (first check fixes some sprite drawing, e.g. hedgehogs)
if (abs(X) > W) and ((abs(X + dir * OffsetX) - W / 2) * cScaleFactor > cScreenWidth) then
    exit;
if (abs(Y) > H) and ((abs(Y + OffsetY - (0.5 * cScreenHeight)) - W / 2) * cScaleFactor > cScreenHeight) then
    exit;

glPushMatrix;
glTranslatef(X, Y, 0);
if Dir = 0 then Dir:= 1;

glRotatef(Angle, 0, 0, Dir);

glTranslatef(Dir*OffsetX, OffsetY, 0);
glScalef(Scale, Scale, 1);

// Any reason for this call? And why only in t direction, not s?
//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

hw:= w div (2 div Dir);

nx:= round(Texture^.w / w); // number of horizontal frames
ny:= round(Texture^.h / h); // number of vertical frames

ft:= (Frame mod ny) * Texture^.ry / ny;
fb:= ((Frame mod ny) + 1) * Texture^.ry / ny;
fl:= (Frame div ny) * Texture^.rx / nx;
fr:= ((Frame div ny) + 1) * Texture^.rx / nx;

glBindTexture(GL_TEXTURE_2D, Texture^.id);

VertexBuffer[0].X:= -hw;
VertexBuffer[0].Y:= w / -2;
VertexBuffer[1].X:= hw;
VertexBuffer[1].Y:= w / -2;
VertexBuffer[2].X:= hw;
VertexBuffer[2].Y:= w / 2;
VertexBuffer[3].X:= -hw;
VertexBuffer[3].Y:= w / 2;

TextureBuffer[0].X:= fl;
TextureBuffer[0].Y:= ft;
TextureBuffer[1].X:= fr;
TextureBuffer[1].Y:= ft;
TextureBuffer[2].X:= fr;
TextureBuffer[2].Y:= fb;
TextureBuffer[3].X:= fl;
TextureBuffer[3].Y:= fb;

glVertexPointer(2, GL_FLOAT, 0, @VertexBuffer[0]);
glTexCoordPointer(2, GL_FLOAT, 0, @TextureBuffer[0]);
glDrawArrays(GL_TRIANGLE_FAN, 0, Length(VertexBuffer));

glPopMatrix
end;

procedure DrawSpriteRotated(Sprite: TSprite; X, Y, Dir: LongInt; Angle: real);
begin
    DrawTextureRotated(SpritesData[Sprite].Texture,
        SpritesData[Sprite].Width,
        SpritesData[Sprite].Height,
        X, Y, Dir, Angle)
end;

procedure DrawSpriteRotatedF(Sprite: TSprite; X, Y, Frame, Dir: LongInt; Angle: real);
begin
glPushMatrix;
glTranslatef(X, Y, 0);

if Dir < 0 then
    glRotatef(Angle, 0, 0, -1)
else
    glRotatef(Angle, 0, 0,  1);
if Dir < 0 then
    glScalef(-1.0, 1.0, 1.0);

DrawSprite(Sprite, -SpritesData[Sprite].Width div 2, -SpritesData[Sprite].Height div 2, Frame);

glPopMatrix
end;

procedure DrawTextureRotated(Texture: PTexture; hw, hh, X, Y, Dir: LongInt; Angle: real);
var VertexBuffer: array [0..3] of TVertex2f;
begin
// do not draw anything outside the visible screen space (first check fixes some sprite drawing, e.g. hedgehogs)
if (abs(X) > 2 * hw) and ((abs(X) - hw) > cScreenWidth / cScaleFactor) then
    exit;
if (abs(Y) > 2 * hh) and ((abs(Y - 0.5 * cScreenHeight) - hh) > cScreenHeight / cScaleFactor) then
    exit;

glPushMatrix;
glTranslatef(X, Y, 0);

if Dir < 0 then
    begin
    hw:= - hw;
    glRotatef(Angle, 0, 0, -1);
    end
else
    glRotatef(Angle, 0, 0,  1);


glBindTexture(GL_TEXTURE_2D, Texture^.id);

VertexBuffer[0].X:= -hw;
VertexBuffer[0].Y:= -hh;
VertexBuffer[1].X:= hw;
VertexBuffer[1].Y:= -hh;
VertexBuffer[2].X:= hw;
VertexBuffer[2].Y:= hh;
VertexBuffer[3].X:= -hw;
VertexBuffer[3].Y:= hh;

glVertexPointer(2, GL_FLOAT, 0, @VertexBuffer[0]);
glTexCoordPointer(2, GL_FLOAT, 0, @Texture^.tb);
glDrawArrays(GL_TRIANGLE_FAN, 0, Length(VertexBuffer));

glPopMatrix
end;

procedure DrawSprite(Sprite: TSprite; X, Y, Frame: LongInt);
var row, col, numFramesFirstCol: LongInt;
begin
    if SpritesData[Sprite].imageHeight = 0 then
        exit;
    numFramesFirstCol:= SpritesData[Sprite].imageHeight div SpritesData[Sprite].Height;
    row:= Frame mod numFramesFirstCol;
    col:= Frame div numFramesFirstCol;
    DrawSprite(Sprite, X, Y, col, row);
end;

procedure DrawSprite(Sprite: TSprite; X, Y, FrameX, FrameY: LongInt);
var r: TSDL_Rect;
begin
    r.x:= FrameX * SpritesData[Sprite].Width;
    r.w:= SpritesData[Sprite].Width;
    r.y:= FrameY * SpritesData[Sprite].Height;
    r.h:= SpritesData[Sprite].Height;
    DrawTextureFromRect(X, Y, @r, SpritesData[Sprite].Texture)
end;

procedure DrawSpriteClipped(Sprite: TSprite; X, Y, TopY, RightX, BottomY, LeftX: LongInt);
var r: TSDL_Rect;
begin
r.x:= 0;
r.y:= 0;
r.w:= SpritesData[Sprite].Width;
r.h:= SpritesData[Sprite].Height;

if (X < LeftX) then
    r.x:= LeftX - X;
if (Y < TopY) then
    r.y:= TopY - Y;

if (Y + SpritesData[Sprite].Height > BottomY) then
    r.h:= BottomY - Y + 1;
if (X + SpritesData[Sprite].Width > RightX) then
    r.w:= RightX - X + 1;

dec(r.h, r.y);
dec(r.w, r.x);

DrawTextureFromRect(X + r.x, Y + r.y, @r, SpritesData[Sprite].Texture)
end;

procedure DrawTextureCentered(X, Top: LongInt; Source: PTexture);
var scale: GLfloat;
begin
    if (Source^.w + 20) > cScreenWidth then
        scale:= cScreenWidth / (Source^.w + 20)
    else
        scale:= 1.0;
    DrawTexture(X - round(Source^.w * scale) div 2, Top, Source, scale)
end;

procedure DrawLine(X0, Y0, X1, Y1, Width: Single; r, g, b, a: Byte);
var VertexBuffer: array [0..1] of TVertex2f;
begin
    glDisable(GL_TEXTURE_2D);
    glEnable(GL_LINE_SMOOTH);

    glPushMatrix;
    glTranslatef(WorldDx, WorldDy, 0);
    glLineWidth(Width);

    Tint(r, g, b, a);
    VertexBuffer[0].X:= X0;
    VertexBuffer[0].Y:= Y0;
    VertexBuffer[1].X:= X1;
    VertexBuffer[1].Y:= Y1;

    glVertexPointer(2, GL_FLOAT, 0, @VertexBuffer[0]);
    glDrawArrays(GL_LINES, 0, Length(VertexBuffer));
    Tint($FF, $FF, $FF, $FF);
    
    glPopMatrix;
    
    glEnable(GL_TEXTURE_2D);
    glDisable(GL_LINE_SMOOTH);
end;

procedure DrawFillRect(r: TSDL_Rect);
var VertexBuffer: array [0..3] of TVertex2f;
begin
// do not draw anything outside the visible screen space (first check fixes some sprite drawing, e.g. hedgehogs)
if (abs(r.x) > r.w) and ((abs(r.x + r.w / 2) - r.w / 2) * cScaleFactor > cScreenWidth) then
    exit;
if (abs(r.y) > r.h) and ((abs(r.y + r.h / 2 - (0.5 * cScreenHeight)) - r.h / 2) * cScaleFactor > cScreenHeight) then
    exit;

glDisable(GL_TEXTURE_2D);

Tint($00, $00, $00, $80);

VertexBuffer[0].X:= r.x;
VertexBuffer[0].Y:= r.y;
VertexBuffer[1].X:= r.x + r.w;
VertexBuffer[1].Y:= r.y;
VertexBuffer[2].X:= r.x + r.w;
VertexBuffer[2].Y:= r.y + r.h;
VertexBuffer[3].X:= r.x;
VertexBuffer[3].Y:= r.y + r.h;

glVertexPointer(2, GL_FLOAT, 0, @VertexBuffer[0]);
glDrawArrays(GL_TRIANGLE_FAN, 0, Length(VertexBuffer));

Tint($FF, $FF, $FF, $FF);
glEnable(GL_TEXTURE_2D)
end;

procedure DrawCircle(X, Y, Radius, Width: LongInt; r, g, b, a: Byte); 
begin
    Tint(r, g, b, a);
    DrawCircle(X, Y, Radius, Width); 
    Tint($FF, $FF, $FF, $FF);
end;

procedure DrawCircle(X, Y, Radius, Width: LongInt); 
var
    i: LongInt;
    CircleVertex: array [0..59] of TVertex2f;
begin
    for i := 0 to 59 do begin
        CircleVertex[i].X := X + Radius*cos(i*pi/30);
        CircleVertex[i].Y := Y + Radius*sin(i*pi/30);
    end;
    glDisable(GL_TEXTURE_2D);
    glEnable(GL_LINE_SMOOTH);
    glPushMatrix;
    glLineWidth(Width);
    glVertexPointer(2, GL_FLOAT, 0, @CircleVertex[0]);
    glDrawArrays(GL_LINE_LOOP, 0, 60);
    glPopMatrix;
    glEnable(GL_TEXTURE_2D);
    glDisable(GL_LINE_SMOOTH);
end;


procedure DrawHedgehog(X, Y: LongInt; Dir: LongInt; Pos, Step: LongWord; Angle: real);
const VertexBuffer: array [0..3] of TVertex2f = (
        (X: -16; Y: -16),
        (X:  16; Y: -16),
        (X:  16; Y:  16),
        (X: -16; Y:  16));
var l, r, t, b: real;
    TextureBuffer: array [0..3] of TVertex2f;
begin
    // do not draw anything outside the visible screen space (first check fixes some sprite drawing, e.g. hedgehogs)
    if (abs(X) > 32) and ((abs(X) - 16) * cScaleFactor > cScreenWidth) then
        exit;
    if (abs(Y) > 32) and ((abs(Y - 0.5 * cScreenHeight) - 16) * cScaleFactor > cScreenHeight) then
        exit;

    t:= Pos * 32 / HHTexture^.h;
    b:= (Pos + 1) * 32 / HHTexture^.h;

    if Dir = -1 then
        begin
        l:= (Step + 1) * 32 / HHTexture^.w;
        r:= Step * 32 / HHTexture^.w
        end
    else
        begin
        l:= Step * 32 / HHTexture^.w;
        r:= (Step + 1) * 32 / HHTexture^.w
    end;


    glPushMatrix();
    glTranslatef(X, Y, 0);
    glRotatef(Angle, 0, 0, 1);

    glBindTexture(GL_TEXTURE_2D, HHTexture^.id);

    TextureBuffer[0].X:= l;
    TextureBuffer[0].Y:= t;
    TextureBuffer[1].X:= r;
    TextureBuffer[1].Y:= t;
    TextureBuffer[2].X:= r;
    TextureBuffer[2].Y:= b;
    TextureBuffer[3].X:= l;
    TextureBuffer[3].Y:= b;

    glVertexPointer(2, GL_FLOAT, 0, @VertexBuffer[0]);
    glTexCoordPointer(2, GL_FLOAT, 0, @TextureBuffer[0]);
    glDrawArrays(GL_TRIANGLE_FAN, 0, Length(VertexBuffer));

    glPopMatrix
end;

procedure DrawScreenWidget(widget: POnScreenWidget);
{$IFDEF USE_TOUCH_INTERFACE}
var alpha: byte = $FF;
begin
with widget^ do
    begin
    if (fadeAnimStart <> 0) then
        begin
        if RealTicks > (fadeAnimStart + FADE_ANIM_TIME) then
            fadeAnimStart:= 0
        else
            if show then 
                alpha:= Byte(trunc((RealTicks - fadeAnimStart)/FADE_ANIM_TIME * $FF))
            else 
                alpha:= Byte($FF - trunc((RealTicks - fadeAnimStart)/FADE_ANIM_TIME * $FF));
        end;

    with moveAnim do
        if animate then
            if RealTicks > (startTime + MOVE_ANIM_TIME) then
                begin
                startTime:= 0;
                animate:= false;
                frame.x:= target.x;
                frame.y:= target.y;
                active.x:= active.x + (target.x - source.x);
                active.y:= active.y + (target.y - source.y);
                end
            else
                begin
                frame.x:= source.x + Round((target.x - source.x) * ((RealTicks - startTime) / MOVE_ANIM_TIME));
                frame.y:= source.y + Round((target.y - source.y) * ((RealTicks - startTime) / MOVE_ANIM_TIME));
                end;

    if show or (fadeAnimStart <> 0) then
        begin
        Tint($FF, $FF, $FF, alpha);
        DrawTexture(frame.x, frame.y, spritesData[sprite].Texture, buttonScale);
        Tint($FF, $FF, $FF, $FF);
        end;
    end;
{$ELSE}
begin
widget:= widget; // avoid hint
{$ENDIF}
end;

procedure Tint(r, g, b, a: Byte); inline;
var nc, tw: Longword;
begin
    nc:= (a shl 24) or (b shl 16) or (g shl 8) or r;

    if nc = lastTint then
        exit;

    if GrayScale then
        begin
        tw:= round(r * RGB_LUMINANCE_RED + g * RGB_LUMINANCE_GREEN + b * RGB_LUMINANCE_BLUE);
        if tw > 255 then
            tw:= 255;
        r:= tw;
        g:= tw;
        b:= tw
        end;

    glColor4ub(r, g, b, a);
    lastTint:= nc;
end;

procedure Tint(c: Longword); inline;
begin
    Tint(((c shr 24) and $FF), ((c shr 16) and $FF), (c shr 8) and $FF, (c and $FF))
end;

end.