Checks level on relevant gl calls against implementation maximum.

TRAC #18905
Issue=243
Signed-off-by: Nicolas Capens
Signed-off-by: Daniel Koch

git-svn-id: https://angleproject.googlecode.com/svn/trunk@885 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/libGLESv2/libGLESv2.cpp b/src/libGLESv2/libGLESv2.cpp
index b9ba2fa..f94b085 100644
--- a/src/libGLESv2/libGLESv2.cpp
+++ b/src/libGLESv2/libGLESv2.cpp
@@ -1100,6 +1100,11 @@
 
         if (context)
         {
+            if (level > context->getMaximumTextureLevel())
+            {
+                return error(GL_INVALID_VALUE);
+            }
+
             switch (target)
             {
               case GL_TEXTURE_2D:
@@ -4765,6 +4770,11 @@
 
         if (context)
         {
+            if (level > context->getMaximumTextureLevel())
+            {
+                return error(GL_INVALID_VALUE);
+            }
+
             switch (target)
             {
               case GL_TEXTURE_2D: