Initial commit of ResInsight version 0.4.8

VisualizationModules/LibRender/cvfPrimitiveSetIndexedUShortScoped.cpp

@@ -0,0 +1,231 @@
+//##################################################################################################
+//
+//   Custom Visualization Core library
+//   Copyright (C) 2011-2012 Ceetron AS
+//    
+//   This library is free software: you can redistribute it and/or modify 
+//   it under the terms of the GNU General Public License as published by 
+//   the Free Software Foundation, either version 3 of the License, or 
+//   (at your option) any later version. 
+//    
+//   This library is distributed in the hope that it will be useful, but WITHOUT ANY 
+//   WARRANTY; without even the implied warranty of MERCHANTABILITY or 
+//   FITNESS FOR A PARTICULAR PURPOSE.   
+//    
+//   See the GNU General Public License at <<http://www.gnu.org/licenses/gpl.html>> 
+//   for more details. 
+//
+//##################################################################################################
+
+#include "cvfBase.h"
+#include "cvfAssert.h"
+#include "cvfMath.h"
+#include "cvfPrimitiveSetIndexedUShortScoped.h"
+#include "cvfOpenGL.h"
+#include "cvfOpenGLResourceManager.h"
+#include "cvfBufferObjectManaged.h"
+
+namespace cvf {
+
+
+
+//==================================================================================================
+///
+/// \class cvf::PrimitiveSetIndexedUShortScoped
+/// \ingroup Render
+///
+/// 
+///
+//==================================================================================================
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+PrimitiveSetIndexedUShortScoped::PrimitiveSetIndexedUShortScoped(PrimitiveType primitiveType)
+:   PrimitiveSet(primitiveType),
+    m_firstElement(0),
+    m_elementCount(0)
+{
+}
+
+
+//--------------------------------------------------------------------------------------------------
+/// Deletes OpenGL resources created by this primitive set
+//--------------------------------------------------------------------------------------------------
+PrimitiveSetIndexedUShortScoped::~PrimitiveSetIndexedUShortScoped()
+{
+    releaseBufferObjectsGPU();
+}
+
+
+//--------------------------------------------------------------------------------------------------
+/// Render primitives in this primitive set using vertex arrays
+/// 
+/// \warning Requires at least OpenGL 1.5
+//--------------------------------------------------------------------------------------------------
+void PrimitiveSetIndexedUShortScoped::render(OpenGLContext* oglContext) const
+{
+    CVF_CALLSITE_OPENGL(oglContext);
+    CVF_ASSERT(BufferObjectManaged::supportedOpenGL(oglContext));
+    
+    if (m_indices.isNull())
+    {
+        return;
+    }
+
+    GLsizei numIndices = static_cast<GLsizei>(m_elementCount);
+    if (numIndices <= 0) 
+    {
+        return;
+    }
+
+    const GLvoid* ptrOrOffset = 0;
+    if (m_indicesBO.notNull() && m_indicesBO->isUploaded())
+    {
+        m_indicesBO->bindBuffer(oglContext);
+        ptrOrOffset = reinterpret_cast<GLvoid*>(m_firstElement*sizeof(GLushort));
+    }
+    else
+    {
+        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+        ptrOrOffset = m_indices->ptr() + m_firstElement;
+    }
+    
+    glDrawElements(primitiveTypeOpenGL(), numIndices, GL_UNSIGNED_SHORT, ptrOrOffset);
+
+    CVF_CHECK_OGL(oglContext);
+}
+
+
+//--------------------------------------------------------------------------------------------------
+/// Create buffer object and upload data to the GPU
+/// 
+/// \warning The current render context must support buffer objects (OGL version >= 1.5)
+//--------------------------------------------------------------------------------------------------
+void PrimitiveSetIndexedUShortScoped::createUploadBufferObjectsGPU(OpenGLContext* oglContext)
+{
+    CVF_TIGHT_ASSERT(oglContext);
+    CVF_TIGHT_ASSERT(BufferObjectManaged::supportedOpenGL(oglContext));
+
+    // Buffer object already in place?
+    if (m_indicesBO.notNull() && m_indicesBO->isUploaded())
+    {
+        return;
+    }
+
+    if (m_indices.notNull())
+    {
+        size_t numIndices = m_indices->size();
+        if (numIndices > 0) 
+        {
+            GLuint uiSizeInBytes = static_cast<GLuint>(numIndices*sizeof(GLushort));
+            m_indicesBO = oglContext->resourceManager()->getOrCreateManagedBufferObject(oglContext, GL_ELEMENT_ARRAY_BUFFER, uiSizeInBytes, m_indices->ptr());
+            CVF_CHECK_OGL(oglContext);
+        }
+    }
+}
+
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+void PrimitiveSetIndexedUShortScoped::releaseBufferObjectsGPU()
+{
+    m_indicesBO = NULL;
+}
+
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+void PrimitiveSetIndexedUShortScoped::setIndices(UShortArray* indices, size_t firstElement, size_t elementCount)
+{
+    if (indices)
+    {
+        CVF_ASSERT(firstElement < indices->size());
+        CVF_ASSERT(firstElement + elementCount <= indices->size());
+        m_indices = indices;
+        m_firstElement = firstElement;
+        m_elementCount = elementCount;
+    }
+    else
+    {
+        CVF_ASSERT(firstElement == 0);
+        CVF_ASSERT(elementCount == 0);
+        m_indices = NULL;
+        m_firstElement = 0;
+        m_elementCount = 0;
+    }
+
+    m_indicesBO = NULL;
+}
+
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+void PrimitiveSetIndexedUShortScoped::setScope(size_t firstElement, size_t elementCount)
+{
+    if (m_indices.notNull())
+    {
+        CVF_ASSERT(firstElement < m_indices->size());
+        CVF_ASSERT(firstElement + elementCount <= m_indices->size());
+        m_firstElement = firstElement;
+        m_elementCount = elementCount;
+    }
+    else
+    {
+        CVF_ASSERT(firstElement == 0);
+        CVF_ASSERT(elementCount == 0);
+    }
+}
+
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+size_t PrimitiveSetIndexedUShortScoped::scopeFirstElement() const
+{
+    return m_firstElement;
+}
+
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+size_t PrimitiveSetIndexedUShortScoped::scopeElementCount() const
+{
+    return m_elementCount;
+}
+
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+const UShortArray* PrimitiveSetIndexedUShortScoped::indices() const
+{
+    return m_indices.p();
+}
+
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+size_t PrimitiveSetIndexedUShortScoped::indexCount() const
+{
+    return m_elementCount;
+}
+
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+uint PrimitiveSetIndexedUShortScoped::index(size_t i) const
+{
+    CVF_TIGHT_ASSERT(m_indices.notNull());
+    return m_indices->get(m_firstElement + i);
+}
+
+
+} // namespace cvf
+