From e14f136e0250caf818c2f6b9b9ac393db7c556d8 Mon Sep 17 00:00:00 2001
From: lecoanet
Date: Fri, 15 Feb 2002 08:25:44 +0000
Subject: R�amenagement du code de clipping local utilisant le stencil

---
 generic/Draw.c | 82 ++++++++++++++--------------------------------------------
 1 file changed, 20 insertions(+), 62 deletions(-)

(limited to 'generic/Draw.c')

diff --git a/generic/Draw.c b/generic/Draw.c
index 95a6013..b0032b3 100644
--- a/generic/Draw.c
+++ b/generic/Draw.c
@@ -978,16 +978,10 @@ RenderPolyline(WidgetInfo	*wi,
 
   for (pass = 0; pass < 2; pass++) {
     if (pass == 0) {
-      glStencilFunc(GL_EQUAL, num_clips, 0xFF);
-      glStencilOp(GL_KEEP, GL_INCR, GL_INCR);
-      if (num_clips == 0) {
-	glEnable(GL_STENCIL_TEST);
-      }
+      GLX_START_CLIP(num_clips, True);
     }
     else {
-      glStencilFunc(GL_EQUAL, num_clips+1, 0xFF);
-      glStencilOp(GL_KEEP, GL_DECR, GL_DECR);
-      glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
+      GLX_RESTORE_STENCIL(num_clips, False);
     }
     if (first_end) {
       GetLineEnd(&points[0], &points[1], line_width, cap_style,
@@ -1028,15 +1022,10 @@ RenderPolyline(WidgetInfo	*wi,
     }
 
     if (pass == 0) {
-      glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
+      GLX_RENDER_CLIPPED();
     }
     else {
-      glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
-      glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
-      glStencilFunc(GL_EQUAL, num_clips, 0xFF);
-      if (num_clips == 0) {
-	glDisable(GL_STENCIL_TEST);
-      }
+      GLX_END_CLIP(num_clips);
       return;
     }
     need_rcaps = ((line_width > 1) && (cap_style == CapRound) && !closed);
@@ -1136,17 +1125,10 @@ RenderTile(struct _WidgetInfo	*wi,
     /*
      * Setup the stencil buffer with the shape to be drawn.
      */
-    if (!num_clips) {
-      glEnable(GL_STENCIL_TEST);
-    }
-    glStencilFunc(GL_EQUAL, num_clips, 0xFF);
-    glStencilOp(GL_KEEP, GL_INCR, GL_INCR);
-    glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
-    (*cb)(closure);
-  
-    glStencilFunc(GL_EQUAL, num_clips+1, 0xFF);      
-    glStencilOp(GL_KEEP, GL_DECR, GL_DECR);	
-    glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+    GLX_START_CLIP(num_clips, False);
+
+    (*cb)(closure);  
+    GLX_RESTORE_STENCIL(num_clips, True);
   }
   
   /*
@@ -1197,11 +1179,7 @@ RenderTile(struct _WidgetInfo	*wi,
   glEnd();
 
   if (cb) {
-    glStencilFunc(GL_EQUAL, num_clips, 0xFF);      
-    glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
-    if (!num_clips) {
-      glDisable(GL_STENCIL_TEST);
-    }
+    GLX_END_CLIP(num_clips);
   }
   glDisable(GL_TEXTURE_2D);
 }
@@ -1351,16 +1329,9 @@ RenderGradient(struct _WidgetInfo	*wi,
      * Draw the gradient shape in the stencil using the provided
      * callback (clipping).
      */
-    if (!num_clips) {
-      glEnable(GL_STENCIL_TEST);
-    }
-    glStencilFunc(GL_EQUAL, num_clips, 0xFF);
-    glStencilOp(GL_KEEP, GL_INCR, GL_INCR);
-    glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
+    GLX_START_CLIP(num_clips, False);
     (*cb)(closure);
-    glStencilFunc(GL_EQUAL, num_clips+1, 0xFF);      
-    glStencilOp(GL_KEEP, GL_DECR, GL_DECR);	
-    glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+    GLX_RESTORE_STENCIL(num_clips, True);
   }
 
   if (type == ZN_AXIAL_GRADIENT) {
@@ -1539,11 +1510,7 @@ RenderGradient(struct _WidgetInfo	*wi,
     /*
      * Restore the previous GL state.
      */
-    glStencilFunc(GL_EQUAL, num_clips, 0xFF);      
-    glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
-    if (!num_clips) {
-      glDisable(GL_STENCIL_TEST);
-    }
+    GLX_END_CLIP(num_clips);
   }
 }
 
@@ -1554,37 +1521,28 @@ RenderHollowDot(struct _WidgetInfo	*wi,
 		ZnReal			size)
 {
   int	num_clips = ZnListSize(wi->clip_stack);
-
-  if (!num_clips) {
-    glEnable(GL_STENCIL_TEST);
-  }
-  glStencilFunc(GL_EQUAL, num_clips, 0xFF);
-  glStencilOp(GL_KEEP, GL_INCR, GL_INCR);
-  glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
+  
+  GLX_START_CLIP(num_clips, False);
+  
   glPointSize(size-2);
   glBegin(GL_POINTS);
   glVertex2f(p->x, p->y);
   glEnd();
 
-  glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
-  glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+  GLX_RENDER_CLIPPED();
+
   glPointSize(size);
   glBegin(GL_POINTS);
   glVertex2f(p->x, p->y);
   glEnd();
 
-  glStencilFunc(GL_EQUAL, num_clips+1, 0xFF);      
-  glStencilOp(GL_KEEP, GL_DECR, GL_DECR);
-  glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
-  glPointSize(size-2);
+  GLX_RESTORE_STENCIL(num_clips, False);
+
   glBegin(GL_POINTS);
   glVertex2f(p->x, p->y);
   glEnd();
-  glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
 
-  if (!num_clips) {
-    glDisable(GL_STENCIL_TEST);
-  }
+  GLX_END_CLIP(num_clips);
 }
 #endif
 
-- 
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