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{* UltraStar Deluxe - Karaoke Game
*
* UltraStar Deluxe is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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; either version 2
* of the License, or (at your option) any later version.
*
* 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; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*}
unit UDrawTexture;
interface
{$IFDEF FPC}
{$MODE Delphi}
{$ENDIF}
{$I switches.inc}
uses
UTexture;
procedure DrawLine(X1, Y1, X2, Y2, ColR, ColG, ColB: real);
procedure DrawQuad(X, Y, W, H, ColR, ColG, ColB: real);
procedure DrawTexture(Texture: TTexture);
implementation
uses
gl;
procedure DrawLine(X1, Y1, X2, Y2, ColR, ColG, ColB: real);
begin
glColor3f(ColR, ColG, ColB);
glBegin(GL_LINES);
glVertex2f(x1, y1);
glVertex2f(x2, y2);
glEnd;
end;
procedure DrawQuad(X, Y, W, H, ColR, ColG, ColB: real);
begin
glColor3f(ColR, ColG, ColB);
glBegin(GL_QUADS);
glVertex2f(x, y);
glVertex2f(x, y+h);
glVertex2f(x+w, y+h);
glVertex2f(x+w, y);
glEnd;
end;
procedure DrawTexture(Texture: TTexture);
var
x1, x2, x3, x4: real;
y1, y2, y3, y4: real;
xt1, xt2, xt3, xt4: real;
yt1, yt2, yt3, yt4: real;
begin
with Texture do
begin
glColor4f(ColR * Int, ColG * Int, ColB * Int, Alpha);
glEnable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
glDepthRange(0, 10);
glDepthFunc(GL_LEQUAL);
// glDepthFunc(GL_GEQUAL);
glEnable(GL_DEPTH_TEST);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
// glBlendFunc(GL_SRC_COLOR, GL_ZERO);
glBindTexture(GL_TEXTURE_2D, TexNum);
x1 := x;
x2 := x;
x3 := x+w*scaleW;
x4 := x+w*scaleW;
y1 := y;
y2 := y+h*scaleH;
y3 := y+h*scaleH;
y4 := y;
if Rot <> 0 then
begin
xt1 := x1 - (x + w/2);
xt2 := x2 - (x + w/2);
xt3 := x3 - (x + w/2);
xt4 := x4 - (x + w/2);
yt1 := y1 - (y + h/2);
yt2 := y2 - (y + h/2);
yt3 := y3 - (y + h/2);
yt4 := y4 - (y + h/2);
x1 := (x + w/2) + xt1 * cos(Rot) - yt1 * sin(Rot);
x2 := (x + w/2) + xt2 * cos(Rot) - yt2 * sin(Rot);
x3 := (x + w/2) + xt3 * cos(Rot) - yt3 * sin(Rot);
x4 := (x + w/2) + xt4 * cos(Rot) - yt4 * sin(Rot);
y1 := (y + h/2) + yt1 * cos(Rot) + xt1 * sin(Rot);
y2 := (y + h/2) + yt2 * cos(Rot) + xt2 * sin(Rot);
y3 := (y + h/2) + yt3 * cos(Rot) + xt3 * sin(Rot);
y4 := (y + h/2) + yt4 * cos(Rot) + xt4 * sin(Rot);
end;
{
glBegin(GL_QUADS);
glTexCoord2f(0, 0); glVertex3f(x1, y1, z);
glTexCoord2f(0, TexH); glVertex3f(x2, y2, z);
glTexCoord2f(TexW, TexH); glVertex3f(x3, y3, z);
glTexCoord2f(TexW, 0); glVertex3f(x4, y4, z);
glEnd;
}
{
glBegin(GL_QUADS);
glTexCoord2f(TexX1*TexW, TexY1*TexH); glVertex3f(x1, y1, z);
glTexCoord2f(TexX1*TexW, TexY2*TexH); glVertex3f(x2, y2, z);
glTexCoord2f(TexX2*TexW, TexY2*TexH); glVertex3f(x3, y3, z);
glTexCoord2f(TexX2*TexW, TexY1*TexH); glVertex3f(x4, y4, z);
glEnd;
}
glBegin(GL_QUADS);
glTexCoord2f(TexX1*TexW, TexY1*TexH);
glVertex3f(x1, y1 + (y2 - (LeftScale * (y2))), z);
glTexCoord2f(TexX1*TexW, TexY2*TexH);
glVertex3f(x2, y2 - (y2 - (LeftScale * (y2))), z);
glTexCoord2f(TexX2*TexW, TexY2*TexH);
glVertex3f(x3, y3 - (y2 - (RightScale * (y2))), z);
glTexCoord2f(TexX2*TexW, TexY1*TexH);
glVertex3f(x4, y4 + (y2 - (RightScale * (y2))), z);
glEnd;
end;
glDisable(GL_DEPTH_TEST);
glDisable(GL_TEXTURE_2D);
end;
end.
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