X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fcore%2Fbuffer.cpp;h=dcb83a7a5960f1cb48436cb9cff5063327c4d5f2;hb=ada4b7614137221b64a00f31fde1498064e9fb19;hp=00fd9cd3d42ac0597c255413b983f8d704b73bb4;hpb=fcde8390ad577fe434dcd4b29e0f410d29f867c9;p=libs%2Fgl.git

diff --git a/source/core/buffer.cpp b/source/core/buffer.cpp
index 00fd9cd3..dcb83a7a 100644
--- a/source/core/buffer.cpp
+++ b/source/core/buffer.cpp
@@ -2,27 +2,24 @@
 #include <msp/gl/extensions/arb_buffer_storage.h>
 #include <msp/gl/extensions/arb_direct_state_access.h>
 #include <msp/gl/extensions/arb_map_buffer_range.h>
+#include <msp/gl/extensions/arb_vertex_buffer_object.h>
 #include <msp/gl/extensions/khr_debug.h>
+#include <msp/gl/extensions/oes_mapbuffer.h>
 #include <msp/strings/format.h>
 #include "buffer.h"
 #include "error.h"
-#include "misc.h"
-#include "vertexsetup.h"
 
 using namespace std;
 
 namespace Msp {
 namespace GL {
 
-const Buffer *Buffer::bound[5] = { 0, 0, 0, 0, 0 };
-BufferType buffer_types[] = { ARRAY_BUFFER, ELEMENT_ARRAY_BUFFER, PIXEL_PACK_BUFFER, PIXEL_UNPACK_BUFFER, UNIFORM_BUFFER };
+Buffer *Buffer::scratch_binding = 0;
 
-Buffer::Buffer(BufferType t):
-	type(t),
-	size(0),
-	allocated(false)
+Buffer::Buffer():
+	size(0)
 {
-	require_buffer_type(type);
+	static Require _req(ARB_vertex_buffer_object);
 
 	if(ARB_direct_state_access)
 		glCreateBuffers(1, &id);
@@ -32,21 +29,11 @@ Buffer::Buffer(BufferType t):
 
 Buffer::~Buffer()
 {
-	for(unsigned i=0; i<5; ++i)
-		if(bound[i]==this)
-			unbind_from(buffer_types[i]);
+	if(this==scratch_binding)
+		unbind_scratch();
 	glDeleteBuffers(1, &id);
 }
 
-void Buffer::require_buffer_type(BufferType type)
-{
-	static Require _req_vbo(ARB_vertex_buffer_object);
-	if(type==PIXEL_PACK_BUFFER || type==PIXEL_UNPACK_BUFFER)
-		static Require _req_pbo(ARB_pixel_buffer_object);
-	else if(type==UNIFORM_BUFFER)
-		static Require _req_ubo(ARB_uniform_buffer_object);
-}
-
 void Buffer::storage(unsigned sz)
 {
 	if(size>0)
@@ -59,14 +46,6 @@ void Buffer::storage(unsigned sz)
 		throw invalid_argument("Buffer::storage");
 
 	size = sz;
-}
-
-void Buffer::allocate()
-{
-	if(size==0)
-		throw invalid_operation("Buffer::allocate");
-	if(allocated)
-		return;
 
 	if(ARB_buffer_storage)
 	{
@@ -75,47 +54,22 @@ void Buffer::allocate()
 			glNamedBufferStorage(id, size, 0, flags);
 		else
 		{
-			BindRestore _bind(this, type);
-			glBufferStorage(type, size, 0, flags);
+			bind_scratch();
+			glBufferStorage(GL_ARRAY_BUFFER, size, 0, flags);
 		}
-
-		allocated = true;
 	}
-	else
-		data(0);
-}
-
-void Buffer::set_usage(BufferUsage)
-{
-}
-
-void Buffer::data(const void *d)
-{
-	if(size==0)
-		throw invalid_operation("Buffer::data");
-
-	if(ARB_buffer_storage)
-		return sub_data(0, size, d);
-
-	if(ARB_direct_state_access)
-		glNamedBufferData(id, size, d, STATIC_DRAW);
+	else if(ARB_direct_state_access)
+		glNamedBufferData(id, size, 0, GL_STATIC_DRAW);
 	else
 	{
-		BindRestore _bind(this, type);
-		glBufferData(type, size, d, STATIC_DRAW);
+		bind_scratch();
+		glBufferData(GL_ARRAY_BUFFER, size, 0, GL_STATIC_DRAW);
 	}
-
-	allocated = true;
 }
 
-void Buffer::data(unsigned sz, const void *d)
+void Buffer::data(const void *d)
 {
-	if(size==0)
-		storage(sz);
-	else if(sz!=size)
-		throw incompatible_data("Buffer::data");
-
-	data(d);
+	return sub_data(0, size, d);
 }
 
 void Buffer::sub_data(unsigned off, unsigned sz, const void *d)
@@ -123,14 +77,12 @@ void Buffer::sub_data(unsigned off, unsigned sz, const void *d)
 	if(size==0)
 		throw invalid_operation("Buffer::sub_data");
 
-	allocate();
-
 	if(ARB_direct_state_access)
 		glNamedBufferSubData(id, off, sz, d);
 	else
 	{
-		BindRestore _bind(this, type);
-		glBufferSubData(type, off, sz, d);
+		bind_scratch();
+		glBufferSubData(GL_ARRAY_BUFFER, off, sz, d);
 	}
 }
 
@@ -140,33 +92,18 @@ void Buffer::require_size(unsigned req_sz) const
 		throw buffer_too_small(format("buffer has %d bytes; %d required", size, req_sz));
 }
 
-BufferRange *Buffer::create_range(unsigned s, unsigned o)
-{
-	return new BufferRange(*this, s, o);
-}
-
 void *Buffer::map()
 {
-	allocate();
-	if(ARB_map_buffer_range)
-	{
-		if(ARB_direct_state_access)
-			return glMapNamedBufferRange(id, 0, size, GL_MAP_READ_BIT|GL_MAP_WRITE_BIT);
-		else
-		{
-			BindRestore _bind(this, type);
-			return glMapBufferRange(type, 0, size, GL_MAP_READ_BIT|GL_MAP_WRITE_BIT);
-		}
-	}
-	else if(ARB_direct_state_access)
-		return glMapNamedBuffer(id, GL_READ_WRITE);
-	else if(OES_mapbuffer)
+	static Require _req(ARB_map_buffer_range);
+
+	if(ARB_direct_state_access)
+		return glMapNamedBufferRange(id, 0, size, GL_MAP_READ_BIT|GL_MAP_WRITE_BIT);
+	else
 	{
-		BindRestore _bind(this, type);
-		return glMapBuffer(type, GL_READ_WRITE);
+		bind_scratch();
+		void *result = glMapBufferRange(GL_ARRAY_BUFFER, 0, size, GL_MAP_READ_BIT|GL_MAP_WRITE_BIT);
+		return result;
 	}
-	else
-		throw invalid_operation("Buffer::map");
 }
 
 bool Buffer::unmap()
@@ -176,68 +113,14 @@ bool Buffer::unmap()
 		return glUnmapNamedBuffer(id);
 	else if(OES_mapbuffer)
 	{
-		BindRestore _bind(this, type);
-		return glUnmapBuffer(type);
+		bind_scratch();
+		bool result = glUnmapBuffer(GL_ARRAY_BUFFER);
+		return result;
 	}
 	else
 		return true;
 }
 
-void Buffer::bind_to(BufferType t) const
-{
-	if(t!=type)
-		require_buffer_type(t);
-	if(t==ELEMENT_ARRAY_BUFFER)
-		if(const VertexSetup *vs = VertexSetup::current())
-		{
-			// Don't change the binding in a vertex array object
-			if(this==vs->get_index_buffer())
-				return;
-			throw invalid_operation("Buffer::bind_to(ELEMENT_ARRAY_BUFFER)");
-		}
-	if(set_current(t, this))
-		glBindBuffer(t, id);
-}
-
-const Buffer *Buffer::current(BufferType t)
-{
-	if(t==ELEMENT_ARRAY_BUFFER)
-		if(const VertexSetup *vs = VertexSetup::current())
-			return vs->get_index_buffer();
-	return binding(t);
-}
-
-void Buffer::unbind_from(BufferType type)
-{
-	if(type==ELEMENT_ARRAY_BUFFER && VertexSetup::current())
-		throw invalid_operation("Buffer::unbind_from(ELEMENT_ARRAY_BUFFER)");
-	if(set_current(type, 0))
-		glBindBuffer(type, 0);
-}
-
-const Buffer *&Buffer::binding(BufferType type)
-{
-	switch(type)
-	{
-	case ARRAY_BUFFER:         return bound[0];
-	case ELEMENT_ARRAY_BUFFER: return bound[1];
-	case PIXEL_PACK_BUFFER:    return bound[2];
-	case PIXEL_UNPACK_BUFFER:  return bound[3];
-	case UNIFORM_BUFFER:       return bound[4];
-	default: throw invalid_argument("Buffer::binding");
-	}
-}
-
-bool Buffer::set_current(BufferType type, const Buffer *buf)
-{
-	const Buffer *&ptr = binding(type);
-	if(ptr==buf)
-		return false;
-
-	ptr = buf;
-	return true;
-}
-
 void Buffer::set_debug_name(const string &name)
 {
 #ifdef DEBUG
@@ -248,85 +131,22 @@ void Buffer::set_debug_name(const string &name)
 #endif
 }
 
-
-vector<const BufferRange *> BufferRange::bound_uniform;
-
-BufferRange::BufferRange(Buffer &b, unsigned o, unsigned s):
-	buffer(b),
-	offset(o),
-	size(s)
-{
-	if(o>buffer.get_size() || o+s>buffer.get_size())
-		throw out_of_range("BufferRange::BufferRange");
-}
-
-BufferRange::~BufferRange()
+void Buffer::bind_scratch()
 {
-	for(unsigned i=0; i<bound_uniform.size(); ++i)
-		if(bound_uniform[i]==this)
-			unbind_from(UNIFORM_BUFFER, i);
-}
-
-void BufferRange::data(const void *d)
-{
-	buffer.sub_data(offset, size, d);
-}
-
-void BufferRange::bind_to(BufferType t, unsigned i)
-{
-	if(t!=buffer.type)
-		Buffer::require_buffer_type(t);
-	if(set_current(t, i, this))
-	{
-		// The buffer gets bound as a side effect
-		Buffer::set_current(t, &buffer);
-		glBindBufferRange(t, i, buffer.id, offset, size);
-	}
-}
-
-void BufferRange::unbind_from(BufferType t, unsigned i)
-{
-	if(set_current(t, i, 0))
+	if(scratch_binding!=this)
 	{
-		Buffer::set_current(t, 0);
-		glBindBufferBase(t, i, 0);
+		glBindBuffer(GL_ARRAY_BUFFER, id);
+		scratch_binding = this;
 	}
 }
 
-const BufferRange *&BufferRange::binding(BufferType type, unsigned index)
+void Buffer::unbind_scratch()
 {
-	if(type==UNIFORM_BUFFER)
+	if(scratch_binding)
 	{
-		if(index>=get_n_uniform_buffer_bindings())
-			throw out_of_range("BufferRange::binding");
-		if(bound_uniform.size()<=index)
-			bound_uniform.resize(index+1);
-		return bound_uniform[index];
+		glBindBuffer(GL_ARRAY_BUFFER, 0);
+		scratch_binding = 0;
 	}
-	else
-		throw invalid_argument("BufferRange::binding");
-}
-
-bool BufferRange::set_current(BufferType type, unsigned index, const BufferRange *buf)
-{
-	const BufferRange *&ptr = binding(type, index);
-	if(ptr==buf)
-		return false;
-
-	ptr = buf;
-	return true;
-}
-
-unsigned BufferRange::get_n_uniform_buffer_bindings()
-{
-	static unsigned count = get_i(GL_MAX_UNIFORM_BUFFER_BINDINGS);
-	return count;
-}
-
-unsigned BufferRange::get_uniform_buffer_alignment()
-{
-	static unsigned align = get_i(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT);
-	return align;
 }
 
 } // namespace GL