Added the texture usage parameter.

TRAC #18732
Signed-off-by: Daniel Koch
Author: Nicolas Capens

git-svn-id: https://angleproject.googlecode.com/svn/trunk@860 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/libGLESv2/libGLESv2.cpp b/src/libGLESv2/libGLESv2.cpp
index 167fc57..eb4d4c3 100644
--- a/src/libGLESv2/libGLESv2.cpp
+++ b/src/libGLESv2/libGLESv2.cpp
@@ -3361,6 +3361,9 @@
               case GL_TEXTURE_IMMUTABLE_FORMAT_EXT:
                 *params = (GLfloat)(texture->isImmutable() ? GL_TRUE : GL_FALSE);
                 break;
+              case GL_TEXTURE_USAGE_ANGLE:
+                *params = (GLfloat)texture->getUsage();
+                break;
               default:
                 return error(GL_INVALID_ENUM);
             }
@@ -3413,6 +3416,9 @@
               case GL_TEXTURE_IMMUTABLE_FORMAT_EXT:
                 *params = texture->isImmutable() ? GL_TRUE : GL_FALSE;
                 break;
+              case GL_TEXTURE_USAGE_ANGLE:
+                *params = texture->getUsage();
+                break;
               default:
                 return error(GL_INVALID_ENUM);
             }
@@ -4832,6 +4838,12 @@
                     return error(GL_INVALID_ENUM);
                 }
                 break;
+              case GL_TEXTURE_USAGE_ANGLE:
+                if (!texture->setUsage((GLenum)param))
+                {
+                    return error(GL_INVALID_ENUM);
+                }
+                break;
               default:
                 return error(GL_INVALID_ENUM);
             }