Merge pull request #71 from esemplare/master

Fix Bug 365: Bug on javax.media.opengl.glu.GLU.gluBuild2DMipmaps
I will commit your unit test manually from the bug report (pls add it to your pull request next time)
Thank you!

1 files changed, 63 insertions, 14 deletions

diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/ScaleInternal.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/ScaleInternal.java
index 5f086ceff..9c95ae304 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/ScaleInternal.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/ScaleInternal.java
@@ -195,8 +195,15 @@ public class ScaleInternal {
         highy_int = heightin - 1;
       lowx_int = 0;
       lowx_float = 0.0f;
-      highx_int = convx_int;
-      highx_float = convx_float;
+      // If we have a single column, fix the max width values
+      // to prevent buffer overflow
+      if (widthin == 1 && widthout == 1) {
+        highx_int = 0;
+        highx_float = 0.0f;
+      } else {
+        highx_int = convx_int;
+        highx_float = convx_float;
+      }
       
       for( j = 0; j < widthout; j++ ) {
         
@@ -414,8 +421,15 @@ public class ScaleInternal {
         highy_int = heightin - 1;
       lowx_int = 0;
       lowx_float = 0.0f;
-      highx_int = convx_int;
-      highx_float = convx_float;
+      // If we have a single column, fix the max width values
+      // to prevent buffer overflow
+      if (widthin == 1 && widthout == 1) {
+        highx_int = 0;
+        highx_float = 0.0f;
+      } else {
+        highx_int = convx_int;
+        highx_float = convx_float;
+      }
       
       for( j = 0; j < widthout; j++ ) {
         
@@ -632,8 +646,15 @@ public class ScaleInternal {
         highy_int = heightin - 1;
       lowx_int = 0;
       lowx_float = 0.0f;
-      highx_int = convx_int;
-      highx_float = convx_float;
+      // If we have a single column, fix the max width values
+      // to prevent buffer overflow
+      if (widthin == 1 && widthout == 1) {
+        highx_int = 0;
+        highx_float = 0.0f;
+      } else {
+        highx_int = convx_int;
+        highx_float = convx_float;
+      }
       
       for( j = 0; j < widthout; j++ ) {
         
@@ -915,8 +936,15 @@ public class ScaleInternal {
         highy_int = heightin - 1;
       lowx_int = 0;
       lowx_float = 0.0f;
-      highx_int = convx_int;
-      highx_float = convx_float;
+      // If we have a single column, fix the max width values
+      // to prevent buffer overflow
+      if (widthin == 1 && widthout == 1) {
+        highx_int = 0;
+        highx_float = 0.0f;
+      } else {
+        highx_int = convx_int;
+        highx_float = convx_float;
+      }
       
       for( j = 0; j < widthout; j++ ) {
         
@@ -1210,8 +1238,15 @@ public class ScaleInternal {
         highy_int = heightin - 1;
       lowx_int = 0;
       lowx_float = 0.0f;
-      highx_int = convx_int;
-      highx_float = convx_float;
+      // If we have a single column, fix the max width values
+      // to prevent buffer overflow
+      if (widthin == 1 && widthout == 1) {
+        highx_int = 0;
+        highx_float = 0.0f;
+      } else {
+        highx_int = convx_int;
+        highx_float = convx_float;
+      }
       
       for( j = 0; j < widthout; j++ ) {
         
@@ -1500,8 +1535,15 @@ public class ScaleInternal {
         highy_int = heightin - 1;
       lowx_int = 0;
       lowx_float = 0.0f;
-      highx_int = convx_int;
-      highx_float = convx_float;
+      // If we have a single column, fix the max width values
+      // to prevent buffer overflow
+      if (widthin == 1 && widthout == 1) {
+        highx_int = 0;
+        highx_float = 0.0f;
+      } else {
+        highx_int = convx_int;
+        highx_float = convx_float;
+      }
       
       for( j = 0; j < widthout; j++ ) {
         
@@ -1797,8 +1839,15 @@ public class ScaleInternal {
         highy_int = heightin - 1;
       lowx_int = 0;
       lowx_float = 0.0f;
-      highx_int = convx_int;
-      highx_float = convx_float;
+      // If we have a single column, fix the max width values
+      // to prevent buffer overflow
+      if (widthin == 1 && widthout == 1) {
+        highx_int = 0;
+        highx_float = 0.0f;
+      } else {
+        highx_int = convx_int;
+        highx_float = convx_float;
+      }
       
       for( j = 0; j < widthout; j++ ) {