1 files changed, 176 insertions, 0 deletions
diff --git a/src/menu/UMenuBackgroundFade.pas b/src/menu/UMenuBackgroundFade.pas
new file mode 100644
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+++ b/src/menu/UMenuBackgroundFade.pas
@@ -0,0 +1,176 @@
+{* 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 UMenuBackgroundFade;
+
+interface
+
+{$IFDEF FPC}
+  {$MODE Delphi}
+{$ENDIF}
+
+{$I switches.inc}
+
+uses
+  UThemes,
+  UTexture,
+  UMenuBackground,
+  UPath;
+
+//TMenuBackgroundFade - Background Fade In for Overlay screens
+//--------
+
+type
+  TMenuBackgroundFade = class (TMenuBackground)
+    private
+      Tex:        TTexture;
+      Color:      TRGB;
+      Alpha:      real;
+      
+      useTexture: boolean;
+
+      FadeTime:   cardinal;
+    public
+      constructor Create(const ThemedSettings: TThemeBackground); override;
+      procedure   OnShow; override;
+      procedure   Draw; override;
+      destructor  Destroy; override;
+  end;
+
+const
+  FADEINTIME = 1500; //Time the bg fades in
+
+implementation
+uses
+  sdl,
+  gl,
+  glext,
+  USkins,
+  UCommon,
+  UGraphic;
+
+constructor TMenuBackgroundFade.Create(const ThemedSettings: TThemeBackground);
+var
+  texFilename: IPath;
+begin
+  inherited;
+  FadeTime := 0;
+
+  Color := ThemedSettings.Color;
+  Alpha := ThemedSettings.Alpha;
+  if (Length(ThemedSettings.Tex) > 0) then
+  begin
+    texFilename := Skin.GetTextureFileName(ThemedSettings.Tex);
+    Tex         := Texture.GetTexture(texFilename, TEXTURE_TYPE_PLAIN);
+
+    UseTexture  := (Tex.TexNum <> 0);
+  end
+  else
+    UseTexture := false;
+
+  if (not UseTexture) then
+    FreeandNil(Tex);
+end;
+
+destructor  TMenuBackgroundFade.Destroy;
+begin
+  //Why isn't there any Tex.free method?
+  {if UseTexture then
+    FreeandNil(Tex); }
+  inherited;
+end;
+
+procedure   TMenuBackgroundFade.OnShow;
+begin
+  FadeTime := SDL_GetTicks;
+end;
+
+procedure   TMenuBackgroundFade.Draw;
+var
+  Progress: real;
+begin
+  if FadeTime = 0 then
+    Progress := Alpha
+  else
+    Progress := Alpha * (SDL_GetTicks - FadeTime) / FADEINTIME;
+
+  if Progress > Alpha then
+  begin
+    FadeTime := 0;
+    Progress := Alpha;
+  end;
+
+  if (UseTexture) then
+  begin //Draw Texture to Screen
+    if (ScreenAct = 1) then //Clear just once when in dual screen mode
+      glClear(GL_DEPTH_BUFFER_BIT);
+
+    glEnable(GL_TEXTURE_2D);
+    glEnable(GL_BLEND);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+    glColorRGB(Color, Progress);
+    glBindTexture(GL_TEXTURE_2D, Tex.TexNum);
+
+    glBegin(GL_QUADS);
+      glTexCoord2f(Tex.TexX1*Tex.TexW, Tex.TexY1*Tex.TexH);
+      glVertex2f(0, 0);
+
+      glTexCoord2f(Tex.TexX1*Tex.TexW, Tex.TexY2*Tex.TexH);
+      glVertex2f(0, 600);
+
+      glTexCoord2f(Tex.TexX2*Tex.TexW, Tex.TexY2*Tex.TexH);
+      glVertex2f(800, 600);
+
+      glTexCoord2f(Tex.TexX2*Tex.TexW, Tex.TexY1*Tex.TexH);
+      glVertex2f(800, 0);
+    glEnd;
+
+    glDisable(GL_BLEND);
+    glDisable(GL_TEXTURE_2D);
+  end
+  else
+  begin //Clear Screen w/ progress Alpha + Color
+    if (ScreenAct = 1) then //Clear just once when in dual screen mode
+      glClear(GL_DEPTH_BUFFER_BIT);
+      
+    glDisable(GL_TEXTURE_2D);
+    glEnable(GL_BLEND);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+    glColorRGB(Color, Progress);
+
+    glBegin(GL_QUADS);
+      glVertex2f(0, 0);
+      glVertex2f(0, 600);
+      glVertex2f(800, 600);
+      glVertex2f(800, 0);
+    glEnd;
+
+    glDisable(GL_BLEND);
+  end;  
+end;
+
+end.