X-Git-Url: https://git.ucc.asn.au/?p=ipdf%2Fcode.git;a=blobdiff_plain;f=src%2Fgraphicsbuffer.cpp;h=217fa9a00129e859eb9b5bc16d6d02ea8a686ab9;hp=37d9b12f82ceae844098fbf710d01e110bf00cb0;hb=888817a67a9d840be66b52811b01eb77f10ff3e6;hpb=af1f07330cb8f4d448cc75ee720b633338eba1e8

diff --git a/src/graphicsbuffer.cpp b/src/graphicsbuffer.cpp
index 37d9b12..217fa9a 100644
--- a/src/graphicsbuffer.cpp
+++ b/src/graphicsbuffer.cpp
@@ -36,7 +36,7 @@ static GLenum BufferUsageToGLUsage(GraphicsBuffer::BufferUsage buffer_usage)
 		usage = GL_STREAM_COPY;
 		break;
 	default:
-		SDL_assert(false && "Unknown buffer usage type.");
+		SDL_assert(false && "Unknown buffer usage type."); //WTF?
 		usage = GL_DYNAMIC_DRAW;
 	}
 	return usage;
@@ -56,6 +56,8 @@ static GLenum BufferTypeToGLType(GraphicsBuffer::BufferType buffer_type)
 		return GL_PIXEL_UNPACK_BUFFER;
 	case GraphicsBuffer::BufferTypeUniform:
 		return GL_UNIFORM_BUFFER;
+	case GraphicsBuffer::BufferTypeTexture:
+		return GL_TEXTURE_BUFFER;
 	case GraphicsBuffer::BufferTypeDrawIndirect:
 		return GL_DRAW_INDIRECT_BUFFER;
 	default:
@@ -66,11 +68,13 @@ static GLenum BufferTypeToGLType(GraphicsBuffer::BufferType buffer_type)
 GraphicsBuffer::GraphicsBuffer()
 {
 	m_invalidated = true;
-	m_map_pointer = nullptr;
+	m_map_pointer = NULL;
 	m_buffer_size = 0;
 	m_buffer_shape_dirty = true;
 	m_buffer_handle = 0;
 	m_buffer_usage = BufferUsageDynamicDraw;
+	m_faking_map = false;
+	m_name = "Unnamed Buffer";
 	SetUsage(BufferUsageStaticDraw);
 }
 
@@ -88,6 +92,11 @@ void GraphicsBuffer::SetType(GraphicsBuffer::BufferType bufType)
 	m_buffer_type = bufType;
 }
 
+void GraphicsBuffer::SetName(const char *name)
+{
+	m_name = name;
+}
+
 void GraphicsBuffer::SetUsage(GraphicsBuffer::BufferUsage bufUsage)
 {
 	if (bufUsage != m_buffer_usage)
@@ -103,28 +112,30 @@ void GraphicsBuffer::Invalidate()
 	if (!m_buffer_shape_dirty)
 	{
 		// Orphan the block of memory we're pointing to.
-		Upload(m_buffer_size, nullptr);
+		Upload(m_buffer_size, NULL);
 	}
 	// Apparently not supported.
 	//glInvalidateBufferData(m_buffer_handle);
 }
 
-void GraphicsBuffer::RecreateBuffer()
+bool GraphicsBuffer::RecreateBuffer(const void *data)
 {
 	// If the buffer is not dirty, don't recreate it.
-	if (!m_buffer_shape_dirty) return;
+	if (!m_buffer_shape_dirty) return false;
 	// If the buffer is mapped, don't recreate it.
-	if (m_map_pointer) return;
+	if (!m_faking_map && m_map_pointer) return false;
 	// If the buffer has data in it we need, don't recreate it.
-	if (!m_invalidated) return;
+	if (!m_invalidated) return false;
 	if (m_buffer_handle)
 	{
 		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)
-		Upload(m_buffer_size, nullptr);
+		Upload(m_buffer_size, data);
+	return true;
 }
 
 void* GraphicsBuffer::Map(bool read, bool write, bool invalidate)
@@ -145,6 +156,14 @@ void* GraphicsBuffer::Map(bool read, bool write, bool invalidate)
 	if (m_map_pointer)
 		Warn("Tried to map already mapped buffer!");	
 
+
+	if (!read && m_buffer_usage == BufferUsage::BufferUsageStaticDraw)
+	{
+		m_map_pointer = malloc(m_buffer_size);
+		m_faking_map = true;
+		return m_map_pointer;
+	}
+
 	RecreateBuffer();
 
 	Bind();
@@ -174,9 +193,23 @@ 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 = NULL;
+		m_invalidated = false;
+		m_faking_map = false;
+		return;
+	}
+	
 	Bind();
 	glUnmapBuffer(target);
-	m_map_pointer = nullptr;
+	m_map_pointer = NULL;
 	m_invalidated = false;
 }
 
@@ -187,13 +220,14 @@ void GraphicsBuffer::Upload(size_t length, const void* data)
 	GLenum usage = BufferUsageToGLUsage(m_buffer_usage);
 
 	m_invalidated = true;
-	RecreateBuffer();
-	
-	Bind();
-	glBufferData(target, length, data, usage);
-	if (data != nullptr)
-		m_invalidated = false;
 	m_buffer_size = length;
+	if (!RecreateBuffer(data))
+	{
+		Bind();
+		glBufferData(target, length, data, usage);
+	}
+	if (data != NULL)
+		m_invalidated = false;
 }
 
 void GraphicsBuffer::UploadRange(size_t length, intptr_t offset, const void* data)
@@ -212,20 +246,22 @@ void GraphicsBuffer::Resize(size_t length)
 	if (m_invalidated)
 	{
 		m_buffer_size = length;
-		RecreateBuffer();	
 	}
 	else
 	{
+		glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 0, -1, "Resizing buffer.");
+		glDebugMessageControl(GL_DONT_CARE, GL_DONT_CARE, GL_DEBUG_SEVERITY_HIGH, 0, NULL, GL_TRUE);
 		// Create a new buffer and copy the old data into it.
 		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);
 		glDeleteBuffers(1, &old_buffer);
 		m_buffer_size = length;
+		glPopDebugGroup();
 	}
 }
 
@@ -237,3 +273,7 @@ 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);
+}