Adding things to quadtree is implemented but segfaulty.

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

diff --git a/src/graphicsbuffer.cpp b/src/graphicsbuffer.cpp
index 844dfe8..c3d9620 100644 (file)
--- a/src/graphicsbuffer.cpp
+++ b/src/graphicsbuffer.cpp
@@ -130,11 +130,13 @@ bool GraphicsBuffer::RecreateBuffer(const void *data)
        {
                glDeleteBuffers(1, &m_buffer_handle);
        }
-       glGenBuffers(1, &m_buffer_handle);
-       glObjectLabel(GL_BUFFER, m_buffer_handle, -1, m_name);
-       m_buffer_shape_dirty = false;
        if (m_buffer_size)
+       {
+               glGenBuffers(1, &m_buffer_handle);
+               glObjectLabel(GL_BUFFER, m_buffer_handle, -1, m_name);
+               m_buffer_shape_dirty = false;
                Upload(m_buffer_size, data);
+       }
        return true;
 }
 
@@ -156,6 +158,10 @@ void* GraphicsBuffer::Map(bool read, bool write, bool invalidate)
        if (m_map_pointer)
                Warn("Tried to map already mapped buffer!");    
 
+       // Intel really doesn't seem to like this.
+       if (!m_buffer_size)
+               return (m_map_pointer = 0);
+
 
        if (!read && m_buffer_usage == BufferUsage::BufferUsageStaticDraw)
        {
@@ -181,6 +187,10 @@ void* GraphicsBuffer::MapRange(int offset, int length, bool read, bool write, bo
        if (m_map_pointer)
                Warn("Tried to map already mapped buffer!");    
 
+       // This sometimes makes Intel corrupt memory?
+       if (!length) return (m_map_pointer = 0);
+
+
        RecreateBuffer();
 
        Bind();
@@ -243,10 +253,19 @@ void GraphicsBuffer::UploadRange(size_t length, intptr_t offset, const void* dat
 
 void GraphicsBuffer::Resize(size_t length)
 {
+       if (!m_buffer_size)
+       {
+               m_buffer_size = length;
+               return;
+       }
        if (m_invalidated && m_buffer_size >= length)
        {
                m_buffer_size = length;
        }
+       else if (length <= m_buffer_size)
+       {
+               // Don't need to do anything.
+       }
        else
        {
                glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 0, -1, "Resizing buffer.");