From ac3248ca332654abd2c28d058526595553e2396d Mon Sep 17 00:00:00 2001
From: codeanticode <andres.colubri@gmail.com>
Date: Sun, 5 Jan 2014 15:20:58 -0500
Subject: [PATCH] fix #2171

---
 .../processing/opengl/PGraphicsOpenGL.java    | 25 +++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/core/src/processing/opengl/PGraphicsOpenGL.java b/core/src/processing/opengl/PGraphicsOpenGL.java
index e174b3254..8835fcb00 100644
--- a/core/src/processing/opengl/PGraphicsOpenGL.java
+++ b/core/src/processing/opengl/PGraphicsOpenGL.java
@@ -5841,12 +5841,33 @@ public class PGraphicsOpenGL extends PGraphics {
     flush(); // make sure that the screen contents are up to date.
 
     Texture tex = getTexture(src);
+    boolean invX = tex.invertedX();
+    boolean invY = tex.invertedY();
+    int scrX0, scrX1;
+    int scrY0, scrY1;
+    if (invX) {
+      scrX0 = dx + dw;
+      scrX1 = dx;
+    } else {
+      scrX0 = dx;
+      scrX1 = dx + dw;
+    }
+    if (invY) {
+      scrY0 = height - (dy + dh);
+      scrY1 = height - dy;
+    } else {
+      // Because drawTexture uses bottom-to-top orientation of Y axis.
+      scrY0 = height - dy;
+      scrY1 = height - (dy + dh);
+    }
+
     pgl.drawTexture(tex.glTarget, tex.glName,
                     tex.glWidth, tex.glHeight, width, height,
                     sx, tex.height - (sy + sh),
                     sx + sw, tex.height - sy,
-                    dx, height - (dy + dh),
-                    dx + dw, height - dy);
+                    scrX0, scrY0,
+                    scrX1, scrY1);
+
 
     if (needEndDraw) {
       endDraw();