X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fbuffer.h;h=cc5e58741c141f1fd5910e1abda23ec68a650a39;hb=47bfbdc8cf844aa079995fca34a3b906b49a4f66;hp=b3a2902f6cb2ca89f663b8c20a8ea0207e8bbdd7;hpb=80977251da90a6878b82d143c22b8335284d3b3e;p=libs%2Fgl.git

diff --git a/source/buffer.h b/source/buffer.h
index b3a2902f..cc5e5874 100644
--- a/source/buffer.h
+++ b/source/buffer.h
@@ -1,14 +1,26 @@
 #ifndef MSP_GL_BUFFER_H_
 #define MSP_GL_BUFFER_H_
 
+#include <stdexcept>
+#include <string>
 #include <vector>
+#include <msp/core/attributes.h>
 #include "gl.h"
+#include <msp/gl/extensions/arb_pixel_buffer_object.h>
 #include <msp/gl/extensions/arb_vertex_buffer_object.h>
 #include <msp/gl/extensions/arb_uniform_buffer_object.h>
+#include <msp/gl/extensions/oes_mapbuffer.h>
 
 namespace Msp {
 namespace GL {
 
+class buffer_too_small: public std::logic_error
+{
+public:
+	buffer_too_small(const std::string &w): std::logic_error(w) { }
+	virtual ~buffer_too_small() throw() { }
+};
+
 enum BufferType
 {
 	ARRAY_BUFFER         = GL_ARRAY_BUFFER,
@@ -31,6 +43,13 @@ enum BufferUsage
 	DYNAMIC_COPY = GL_DYNAMIC_COPY
 };
 
+enum BufferAccess
+{
+	READ_ONLY = GL_READ_ONLY,
+	WRITE_ONLY = GL_WRITE_ONLY,
+	READ_WRITE = GL_READ_WRITE
+};
+
 class BufferRange;
 
 /**
@@ -44,7 +63,6 @@ class Buffer
 
 private:
 	BufferType type;
-	BufferUsage usage;
 	unsigned id;
 	unsigned size;
 
@@ -58,22 +76,41 @@ private:
 	static void require_buffer_type(BufferType);
 
 public:
+	/** Returns the OpenGL ID of the buffer.  For internal use only. */
+	unsigned get_id() const { return id; }
+
+	/** Returns the default binding type for the buffer. */
+	BufferType get_type() const { return type; }
+
+	/** Defines the storage size of the buffer.  Must be called before data can
+	be uploaded.  Storage cannot be changed once set. */
+	void storage(unsigned);
+
 	/** Sets the usage hint of the buffer.  It will take effect the next time
 	the buffer's contents are defined. */
-	void set_usage(BufferUsage);
+	DEPRECATED void set_usage(BufferUsage);
 
 	/** Uploads data into the buffer, completely replacing any previous
-	contents. */
-	void data(unsigned, const void *);
+	contents.  Storage must be defined beforehand.  The data must have size
+	matching the defined storage. */
+	void data(const void *);
+
+	DEPRECATED void data(unsigned, const void *);
 
-	/** Overwrites part of the buffer data with new data.  The buffer size can
-	not be changed with this call. */
+	/** Overwrites part of the buffer data with new data.  Storage must be
+	defined beforehand. */
 	void sub_data(unsigned, unsigned, const void *);
 
 	unsigned get_size() const { return size; }
 
+	void require_size(unsigned) const;
+
 	BufferRange *create_range(unsigned, unsigned);
 
+	void *map();
+	DEPRECATED void *map(BufferAccess) { return map(); }
+	bool unmap();
+
 	/** Binds the buffer in its default slot. */
 	void bind() const { bind_to(type); }
 
@@ -83,30 +120,11 @@ public:
 	/** Unbinds the buffer from its default slot. */
 	void unbind() const { unbind_from(type); }
 
-	static const Buffer *current(BufferType t) { return binding(t); }
+	static const Buffer *current(BufferType);
 	static void unbind_from(BufferType);
 private:
 	static const Buffer *&binding(BufferType);
 	static bool set_current(BufferType, const Buffer *);
-	static void restore(const Buffer *, BufferType);
-};
-
-
-/**
-An adaptor for Buffer to make it compatible with Bind.
-*/
-template<BufferType T>
-class BufferAlias
-{
-private:
-	const Buffer &buffer;
-
-public:
-	BufferAlias(const Buffer &b): buffer(b) { }
-
-	void bind() const { buffer.bind_to(T); }
-	static const Buffer *current() { return Buffer::current(T); }
-	static void unbind() { Buffer::unbind_from(T); }
 };
 
 
@@ -124,6 +142,7 @@ private:
 
 public:
 	BufferRange(Buffer &, unsigned, unsigned);
+	~BufferRange();
 
 	void data(const void *);