3 files changed, 33 insertions, 6 deletions
diff --git a/src/openglgraphics.cpp b/src/openglgraphics.cpp
index ab65fd7ee..80a28dcd2 100644
--- a/src/openglgraphics.cpp
+++ b/src/openglgraphics.cpp
@@ -215,7 +215,7 @@ bool OpenGLGraphics::drawImage(const Image *image, int srcX, int srcY,
         glColor4f(1.0f, 1.0f, 1.0f, image->mAlpha);
 
 #ifdef DEBUG_BIND_TEXTURE
-    logger->log("bind: " + image->getIdPath());
+    debugBindTexture(image);
 #endif
     bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
 
@@ -275,7 +275,7 @@ bool OpenGLGraphics::drawRescaledImage(Image *image, int srcX, int srcY,
         glColor4f(1.0f, 1.0f, 1.0f, image->mAlpha);
 
 #ifdef DEBUG_BIND_TEXTURE
-    logger->log("bind: " + image->getIdPath());
+    debugBindTexture(image);
 #endif
     bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
 
@@ -331,7 +331,7 @@ void OpenGLGraphics::drawImagePattern(const Image *image, int x, int y,
     glColor4f(1.0f, 1.0f, 1.0f, image->mAlpha);
 
 #ifdef DEBUG_BIND_TEXTURE
-    logger->log("bind: " + image->getIdPath());
+    debugBindTexture(image);
 #endif
     bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
 
@@ -468,7 +468,7 @@ void OpenGLGraphics::drawRescaledImagePattern(Image *image,
     glColor4f(1.0f, 1.0f, 1.0f, image->mAlpha);
 
 #ifdef DEBUG_BIND_TEXTURE
-    logger->log("bind: " + image->getIdPath());
+    debugBindTexture(image);
 #endif
     bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
 
@@ -611,7 +611,7 @@ void OpenGLGraphics::drawImagePattern2(GraphicsVertexes *vert,
 
     glColor4f(1.0f, 1.0f, 1.0f, image->mAlpha);
 #ifdef DEBUG_BIND_TEXTURE
-    logger->log("bind: " + image->getIdPath());
+    debugBindTexture(image);
 #endif
     bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
     setTexturingAndBlending(true);
@@ -928,7 +928,7 @@ void OpenGLGraphics::drawTile(ImageVertexes *vert)
 
     glColor4f(1.0f, 1.0f, 1.0f, image->mAlpha);
 #ifdef DEBUG_BIND_TEXTURE
-    logger->log("bind: " + image->getIdPath());
+    debugBindTexture(image);
 #endif
     bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
     setTexturingAndBlending(true);
@@ -1394,4 +1394,24 @@ void OpenGLGraphics::dumpSettings()
     }
 }
 
+#ifdef DEBUG_BIND_TEXTURE
+void OpenGLGraphics::debugBindTexture(const Image *image)
+{
+    const std::string texture = image->getIdPath();
+    if (mOldTexture != texture)
+    {
+        if (!mOldTexture.empty() && !texture.empty())
+        {
+            logger->log("bind: %s to %s", mOldTexture.c_str(),
+                texture.c_str());
+        }
+        mOldTexture = texture;
+    }
+}
+#else
+void OpenGLGraphics::debugBindTexture(Image *image A_UNUSED)
+{
+}
+#endif
+
 #endif // USE_OPENGL
diff --git a/src/openglgraphics.h b/src/openglgraphics.h
index e088fa4e2..eeb875a01 100644
--- a/src/openglgraphics.h
+++ b/src/openglgraphics.h
@@ -25,6 +25,7 @@
 
 #ifdef USE_OPENGL
 
+#include "localconsts.h"
 #include "main.h"
 #include "graphics.h"
 
@@ -152,6 +153,8 @@ class OpenGLGraphics : public Graphics
 
         void updateMemoryInfo();
 
+        void debugBindTexture(const Image *image);
+
     private:
         GLfloat *mFloatTexArray;
         GLint *mIntTexArray;
@@ -161,6 +164,9 @@ class OpenGLGraphics : public Graphics
         GLuint mFboId;
         GLuint mTextureId;
         GLuint mRboId;
+#ifdef DEBUG_BIND_TEXTURE
+        std::string mOldTexture;
+#endif
 };
 #endif
 
diff --git a/src/resources/openglimagehelper.cpp b/src/resources/openglimagehelper.cpp
index 7606b9ec8..63c103e1f 100644
--- a/src/resources/openglimagehelper.cpp
+++ b/src/resources/openglimagehelper.cpp
@@ -275,4 +275,5 @@ int OpenGLImageHelper::useOpenGL()
 {
     return mUseOpenGL;
 }
+
 #endif