From 24cf0fb1d6e2f7467fa3de0f0b7152ee4712d221 Mon Sep 17 00:00:00 2001
From: Christophe Geuzaine <cgeuzaine@ulg.ac.be>
Date: Tue, 27 Aug 2002 02:03:34 +0000
Subject: [PATCH] check if colortable has some alpha components
---
Common/ColorTable.cpp | 11 +++++++++--
Common/ColorTable.h | 5 +++--
2 files changed, 12 insertions(+), 4 deletions(-)
diff --git a/Common/ColorTable.cpp b/Common/ColorTable.cpp
index c259027a3e..1584c9c8fe 100644
--- a/Common/ColorTable.cpp
+++ b/Common/ColorTable.cpp
@@ -1,4 +1,4 @@
-// $Id: ColorTable.cpp,v 1.11 2002-05-20 18:28:24 geuzaine Exp $
+// $Id: ColorTable.cpp,v 1.12 2002-08-27 02:03:34 geuzaine Exp $
//
// Copyright (C) 1997 - 2002 C. Geuzaine, J.-F. Remacle
//
@@ -264,4 +264,11 @@ void ColorTable_Print(GmshColorTable *ct, FILE *fp){
}
-
+int ColorTable_IsAlpha(GmshColorTable *ct){
+ int i, a;
+ for (i=0;i<ct->size;i++) {
+ a = UNPACK_ALPHA( ct->table[i] );
+ if(a<255) return 1;
+ }
+ return 0;
+}
diff --git a/Common/ColorTable.h b/Common/ColorTable.h
index 4f94c0683f..ccc22ea7ec 100644
--- a/Common/ColorTable.h
+++ b/Common/ColorTable.h
@@ -48,8 +48,8 @@ typedef struct{
// float parameters indices
-#define COLORTABLE_CURVE 0 // curvature */
-#define COLORTABLE_BIAS 1 // offset */
+#define COLORTABLE_CURVE 0 // curvature
+#define COLORTABLE_BIAS 1 // offset
#define COLORTABLE_ALPHAPOW 2 // alpha channel power
#define COLORTABLE_ALPHAVAL 3 // alpha channel value
#define COLORTABLE_BETA 4 // beta coeff for brighten
@@ -59,5 +59,6 @@ void ColorTable_Recompute (GmshColorTable * ct, int rgb_flag, int alpha_flag);
void ColorTable_Copy(GmshColorTable *ct);
void ColorTable_Paste(GmshColorTable *ct);
void ColorTable_Print(GmshColorTable *ct, FILE *fp) ;
+int ColorTable_IsAlpha(GmshColorTable *ct) ;
#endif
--
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