Merge branch 'master' of git.ucc.asn.au:ipdf/code

[ipdf/code.git] / src / graphicsbuffer.cpp

diff --git a/src/graphicsbuffer.cpp b/src/graphicsbuffer.cpp
index 576c2d6..da522dc 100644 (file)
--- a/src/graphicsbuffer.cpp
+++ b/src/graphicsbuffer.cpp
@@ -185,12 +185,16 @@ void* GraphicsBuffer::MapRange(int offset, int length, bool read, bool write, bo
 void GraphicsBuffer::UnMap()
 {
        GLenum target = BufferTypeToGLType(m_buffer_type);
+       
+       // If we're not mapped, unmapping is a no-op.
+       if (!m_map_pointer)
+               return;
 
        if (m_faking_map)
        {
                Upload(m_buffer_size, m_map_pointer);
                free(m_map_pointer);
-               m_map_pointer = nullptr;
+               m_map_pointer = NULL;
                m_invalidated = false;
                m_faking_map = false;
                return;
@@ -198,7 +202,7 @@ void GraphicsBuffer::UnMap()
        
        Bind();
        glUnmapBuffer(target);
-       m_map_pointer = nullptr;
+       m_map_pointer = NULL;
        m_invalidated = false;
 }
 
@@ -215,7 +219,7 @@ void GraphicsBuffer::Upload(size_t length, const void* data)
                Bind();
                glBufferData(target, length, data, usage);
        }
-       if (data != nullptr)
+       if (data != NULL)
                m_invalidated = false;
 }
 
@@ -242,7 +246,7 @@ void GraphicsBuffer::Resize(size_t length)
                UnMap();
                GLuint old_buffer = m_buffer_handle;    
                glGenBuffers(1, &m_buffer_handle);
-               Upload(length, nullptr);
+               Upload(length, NULL);
                glBindBuffer(GL_COPY_READ_BUFFER, old_buffer);
                glBindBuffer(GL_COPY_WRITE_BUFFER, m_buffer_handle);
                glCopyBufferSubData(GL_COPY_READ_BUFFER, GL_COPY_WRITE_BUFFER, 0, 0, m_buffer_size);
@@ -259,3 +263,7 @@ void GraphicsBuffer::Bind() const
                glBindBuffer(BufferTypeToGLType(m_buffer_type), m_buffer_handle);
 }
 
+void GraphicsBuffer::BindRange(size_t start, size_t size) const
+{
+       glBindBufferRange(BufferTypeToGLType(m_buffer_type), 0, m_buffer_handle, start, size);
+}