From 18dbb1576abc6eadd9eeb5b5dd29205d33f8276e Mon Sep 17 00:00:00 2001
From: psperl <psperl@6778bc44-b910-0410-a7a0-be141de4315d>
Date: Mon, 30 Jun 2008 03:04:41 +0000
Subject: [PATCH] Video Echo Classes

git-svn-id: https://projectm.svn.sourceforge.net/svnroot/projectm/trunk@1078 6778bc44-b910-0410-a7a0-be141de4315d
---
 src/projectM-engine/VideoEcho.cpp | 90 +++++++++++++++++++++++++++++++
 src/projectM-engine/VideoEcho.hpp | 31 +++++++++++
 2 files changed, 121 insertions(+)
 create mode 100644 src/projectM-engine/VideoEcho.cpp
 create mode 100644 src/projectM-engine/VideoEcho.hpp

diff --git a/src/projectM-engine/VideoEcho.cpp b/src/projectM-engine/VideoEcho.cpp
new file mode 100644
index 000000000..185103caf
--- /dev/null
+++ b/src/projectM-engine/VideoEcho.cpp
@@ -0,0 +1,90 @@
+/*
+ * VideoEcho.cpp
+ *
+ *  Created on: Jun 29, 2008
+ *      Author: pete
+ */
+#ifdef USE_GLES1
+#include <GLES/gl.h>
+#else
+#ifdef __APPLE__
+#include <OpenGL/gl.h>
+#include <OpenGL/glu.h>
+#else
+#include <GL/gl.h>
+#include <GL/glu.h>
+#endif
+#endif
+
+#include "VideoEcho.hpp"
+
+VideoEcho::VideoEcho(): a(0), zoom(1), orientation(Normal)
+{
+	// TODO Auto-generated constructor stub
+
+}
+
+VideoEcho::~VideoEcho()
+{
+	// TODO Auto-generated destructor stub
+}
+
+void VideoEcho::Draw(RenderContext &context)
+{
+
+
+		glEnable(GL_TEXTURE_2D);
+
+
+		float tex[4][2] = {{0, 1},
+				   {0, 0},
+				   {1, 0},
+				   {1, 1}};
+
+		float points[4][2] = {{-0.5, -0.5},
+				      {-0.5,  0.5},
+				      { 0.5,  0.5},
+				      { 0.5,  -0.5}};
+
+		glEnableClientState(GL_VERTEX_ARRAY);
+		glDisableClientState(GL_COLOR_ARRAY);
+		glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+
+		glVertexPointer(2,GL_FLOAT,0,points);
+		glTexCoordPointer(2,GL_FLOAT,0,tex);
+
+		//Now Blend the Video Echo
+		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+		glMatrixMode(GL_TEXTURE);
+
+		//draw video echo
+		glColor4f(1.0, 1.0, 1.0, a);
+		glTranslatef(.5, .5, 0);
+		glScalef(1.0/zoom, 1.0/zoom, 1);
+		glTranslatef(-.5, -.5, 0);
+
+		int flipx=1, flipy=1;
+		switch (orientation)
+		{
+			case Normal: flipx=1;flipy=1;break;
+			case FlipX: flipx=-1;flipy=1;break;
+			case FlipY: flipx=1;flipy=-1;break;
+			case FlipXY: flipx=-1;flipy=-1;break;
+			default: flipx=1;flipy=1; break;
+		}
+
+		float pointsFlip[4][2] = {{-0.5*flipx, -0.5*flipy},
+					  {-0.5*flipx,  0.5*flipy},
+					  { 0.5*flipx,  0.5*flipy},
+					  { 0.5*flipx, -0.5*flipy}};
+
+		glVertexPointer(2,GL_FLOAT,0,pointsFlip);
+		glDrawArrays(GL_TRIANGLE_FAN,0,4);
+
+		glDisable(GL_TEXTURE_2D);
+		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+		glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+
+}
diff --git a/src/projectM-engine/VideoEcho.hpp b/src/projectM-engine/VideoEcho.hpp
new file mode 100644
index 000000000..13f027e35
--- /dev/null
+++ b/src/projectM-engine/VideoEcho.hpp
@@ -0,0 +1,31 @@
+/*
+ * VideoEcho.hpp
+ *
+ *  Created on: Jun 29, 2008
+ *      Author: pete
+ */
+
+#ifndef VIDEOECHO_HPP_
+#define VIDEOECHO_HPP_
+
+#include "Renderable.hpp"
+
+enum Orientation
+{
+	Normal=0, FlipX, FlipY, FlipXY
+};
+
+class VideoEcho: public RenderItem
+{
+public:
+	VideoEcho();
+	virtual ~VideoEcho();
+
+	float a;
+	float zoom;
+	Orientation orientation;
+
+	void Draw(RenderContext &context);
+};
+
+#endif /* VIDEOECHO_HPP_ */