GL*: properly translate HBU setting

Author: paroj

RenderSystems/GL/src/OgreGLHardwareBufferManager.cpp

@@ -108,9 +108,8 @@ namespace Ogre {
     //---------------------------------------------------------------------
     GLenum GLHardwareBufferManager::getGLUsage(unsigned int usage)
     {
-        return  (usage & HardwareBuffer::HBU_DETAIL_DISCARDABLE) ? GL_STREAM_DRAW_ARB :
-                (usage & HardwareBuffer::HBU_STATIC) ? GL_STATIC_DRAW_ARB :
-                GL_DYNAMIC_DRAW_ARB;
+        return (usage == HBU_GPU_TO_CPU) ? GL_STATIC_READ
+                                         : (usage == HBU_GPU_ONLY) ? GL_STATIC_DRAW : GL_DYNAMIC_DRAW;
     }
     //---------------------------------------------------------------------
     GLenum GLHardwareBufferManager::getGLType(unsigned int type)

RenderSystems/GL3Plus/src/OgreGL3PlusHardwareBuffer.cpp

@@ -165,8 +165,7 @@ namespace Ogre {
 
     GLenum GL3PlusHardwareBuffer::getGLUsage(uint32 usage)
     {
-        return  (usage & HardwareBuffer::HBU_DETAIL_DISCARDABLE) ? GL_STREAM_DRAW :
-                (usage & HardwareBuffer::HBU_STATIC) ? GL_STATIC_DRAW :
-                GL_DYNAMIC_DRAW;
+        return (usage == HBU_GPU_TO_CPU) ? GL_STATIC_READ
+                                         : (usage == HBU_GPU_ONLY) ? GL_STATIC_DRAW : GL_DYNAMIC_DRAW;
     }
 }

RenderSystems/GL3Plus/src/OgreGL3PlusTextureBuffer.cpp

@@ -286,7 +286,7 @@ namespace Ogre {
                         "GL3PlusTextureBuffer::download");
 
         // Download data to PBO
-        GL3PlusHardwareBuffer buffer(GL_PIXEL_PACK_BUFFER, data.getConsecutiveSize(), HBU_DETAIL_DISCARDABLE);
+        GL3PlusHardwareBuffer buffer(GL_PIXEL_PACK_BUFFER, data.getConsecutiveSize(), HBU_GPU_TO_CPU);
 
         //        std::stringstream str;
         //        str << "GL3PlusHardwarePixelBuffer::download: " << mTextureID

RenderSystems/GLES2/src/OgreGLES2HardwareBuffer.cpp

@@ -200,8 +200,7 @@ namespace Ogre {
 
     GLenum GLES2HardwareBuffer::getGLUsage(unsigned int usage)
     {
-        return  (usage & HardwareBuffer::HBU_DETAIL_DISCARDABLE) ? GL_STREAM_DRAW :
-                (usage & HardwareBuffer::HBU_STATIC) ? GL_STATIC_DRAW :
-                GL_DYNAMIC_DRAW;
+        return (usage == HBU_GPU_TO_CPU) ? GL_STATIC_READ
+                                         : (usage == HBU_GPU_ONLY) ? GL_STATIC_DRAW : GL_DYNAMIC_DRAW;
     }
 }