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.h | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

(limited to 'generic/Draw.h')

diff --git a/generic/Draw.h b/generic/Draw.h
index d153520..4524c05 100644
--- a/generic/Draw.h
+++ b/generic/Draw.h
@@ -47,6 +47,41 @@
 struct _WidgetInfo;
 struct _ImageBits;
 
+#ifdef GLX
+#define GLX_START_CLIP(num_clips, render) { \
+  if (!num_clips) { \
+    glEnable(GL_STENCIL_TEST); \
+  } \
+  glStencilFunc(GL_EQUAL, num_clips, 0xFF); \
+  glStencilOp(GL_KEEP, GL_INCR, GL_INCR); \
+  if (!render) { \
+    glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE); \
+  } \
+}
+#define GLX_RENDER_CLIPPED() { \
+  glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP); \
+  glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); \
+  }
+#define GLX_RESTORE_STENCIL(num_clips, render) { \
+  glStencilFunc(GL_EQUAL, num_clips+1, 0xFF); \
+  glStencilOp(GL_KEEP, GL_DECR, GL_DECR); \
+  if (render) { \
+    glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); \
+  } \
+  else { \
+   glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE); \
+  } \
+}
+#define GLX_END_CLIP(num_clips) { \
+  glStencilFunc(GL_EQUAL, num_clips, 0xFF); \
+  glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP); \
+  glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); \
+  if (!num_clips) { \
+    glDisable(GL_STENCIL_TEST); \
+  } \
+}
+#endif
+
 
 void SetLineStyle(struct _WidgetInfo *wi, LineStyle line_style);
 void GetLineShape(ZnPoint *p1, ZnPoint *p2, unsigned int line_width,
-- 
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