From 85f855b0a4972fd8d51b51bd3e77a6b68f964c1d Mon Sep 17 00:00:00 2001
From: Roi Cohen <roico@roico-desktop.(none)>
Date: Tue, 3 Jul 2007 14:16:51 +0300
Subject: [PATCH] fix cube's clip planes

---
 include/cube.h |    3 ++-
 plugins/cube.c |   42 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+), 1 deletions(-)

diff --git a/include/cube.h b/include/cube.h
index b4670cb..c1dba8f 100644
--- a/include/cube.h
+++ b/include/cube.h
@@ -25,7 +25,7 @@
 
 #include <compiz.h>
 
-#define CUBE_ABIVERSION 20070621
+#define CUBE_ABIVERSION 20070703
 
 #define CUBE_DISPLAY_OPTION_ABI    0
 #define CUBE_DISPLAY_OPTION_INDEX  1
@@ -112,6 +112,7 @@ typedef struct _CubeScreen {
     PaintOutputProc	       paintOutput;
     PaintTransformedOutputProc paintTransformedOutput;
     PaintBackgroundProc        paintBackground;
+    SetClipPlanesProc          setClipPlanes;
     PaintWindowProc            paintWindow;
     ApplyScreenTransformProc   applyScreenTransform;
     SetScreenOptionProc	       setScreenOption;
diff --git a/plugins/cube.c b/plugins/cube.c
index 63a428e..3523e7b 100644
--- a/plugins/cube.c
+++ b/plugins/cube.c
@@ -1681,6 +1681,46 @@ cubePaintBackground (CompScreen   *s,
     cubeUnSetBackgroundOpacity(s);
 }
 
+static void
+cubeSetClipPlanes (CompScreen	*s,
+		   Region	region,
+		   CompOutput*	output)
+{
+    CUBE_SCREEN(s);
+
+    glTranslatef(cs->outputXOffset, -cs->outputYOffset, 0.0f);
+    glScalef( cs->outputXScale, cs->outputYScale, 1.0f);
+
+    UNWRAP(cs, s, setClipPlanes);
+    (*s->setClipPlanes) (s, region, output);
+    WRAP(cs, s, setClipPlanes, cubeSetClipPlanes);
+
+    if (cs->invert == 1)
+    {
+	GLdouble clipPlane0[] = { 1.0, 0.0, 0.5 / cs->distance, 0.0 };
+	GLdouble clipPlane1[] = { -1.0,  0.0, 0.5 / cs->distance, 0.0 };
+	GLdouble clipPlane2[] = { 0.0,  -1.0, 0.5 / cs->distance, 0.0 };
+	GLdouble clipPlane3[] = { 0.0,  1.0, 0.5 / cs->distance, 0.0 };
+
+	glClipPlane (GL_CLIP_PLANE0, clipPlane0);
+	glClipPlane (GL_CLIP_PLANE1, clipPlane1);
+	glClipPlane (GL_CLIP_PLANE2, clipPlane2);
+	glClipPlane (GL_CLIP_PLANE3, clipPlane3);
+    }
+    else
+    {
+	GLdouble clipPlane0[] = { -1.0, 0.0, -0.5 / cs->distance, 0.0 };
+	GLdouble clipPlane1[] = { 1.0,  0.0, -0.5 / cs->distance, 0.0 };
+	GLdouble clipPlane2[] = { 0.0,  1.0, -0.5 / cs->distance, 0.0 };
+	GLdouble clipPlane3[] = { 0.0,  -1.0, -0.5 / cs->distance, 0.0 };
+
+	glClipPlane (GL_CLIP_PLANE0, clipPlane0);
+	glClipPlane (GL_CLIP_PLANE1, clipPlane1);
+	glClipPlane (GL_CLIP_PLANE2, clipPlane2);
+	glClipPlane (GL_CLIP_PLANE3, clipPlane3);
+    }
+}
+
 static Bool
 cubePaintWindow (CompWindow		  *w,
 		 const WindowPaintAttrib  *attrib,
@@ -2133,6 +2173,7 @@ cubeInitScreen (CompPlugin *p,
     WRAP (cs, s, paintOutput, cubePaintOutput);
     WRAP (cs, s, paintTransformedOutput, cubePaintTransformedOutput);
     WRAP (cs, s, paintBackground, cubePaintBackground);
+    WRAP (cs, s, setClipPlanes, cubeSetClipPlanes);
     WRAP (cs, s, paintWindow, cubePaintWindow);
     WRAP (cs, s, applyScreenTransform, cubeApplyScreenTransform);
     WRAP (cs, s, setScreenOption, cubeSetGlobalScreenOption);
@@ -2156,6 +2197,7 @@ cubeFiniScreen (CompPlugin *p,
     UNWRAP (cs, s, paintOutput);
     UNWRAP (cs, s, paintTransformedOutput);
     UNWRAP (cs, s, paintBackground);
+    UNWRAP (cs, s, setClipPlanes);
     UNWRAP (cs, s, paintWindow);
     UNWRAP (cs, s, applyScreenTransform);
     UNWRAP (cs, s, setScreenOption);
-- 
1.5.2.1.280.g38570