X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fbatch.cpp;h=af1d243e6cba1551e6be65255a55e69a4e7029cf;hp=34bd83c0d7ac07683bc3bea118c9d33a46f3e012;hb=b0059bd068c99dadfc922584911fcb25a21b737b;hpb=a86623004ba91baef76dac9275e9b79366acce16

diff --git a/source/batch.cpp b/source/batch.cpp
index 34bd83c0..af1d243e 100644
--- a/source/batch.cpp
+++ b/source/batch.cpp
@@ -1,9 +1,13 @@
+#include <msp/gl/extensions/arb_draw_instanced.h>
 #include <msp/gl/extensions/ext_draw_range_elements.h>
+#include <msp/gl/extensions/msp_legacy_features.h>
+#include <msp/gl/extensions/msp_primitive_restart.h>
 #include <msp/gl/extensions/nv_primitive_restart.h>
 #include "batch.h"
 #include "bindable.h"
 #include "buffer.h"
 #include "error.h"
+#include "mesh.h"
 #include "vertexarray.h"
 
 using namespace std;
@@ -57,11 +61,7 @@ Batch::Batch(PrimitiveType t):
 	min_index(0),
 	max_index(0),
 	restart(false)
-{
-	/* XXX Should probably provide a fallback to glDrawElements since this class
-	is pretty much required to render anything. */
-	static Require _req(EXT_draw_range_elements);
-}
+{ }
 
 Batch::~Batch()
 {
@@ -104,10 +104,10 @@ Batch &Batch::append(unsigned i)
 	return *this;
 }
 
-void Batch::append(const vector<unsigned> &ind)
+Batch &Batch::append(const vector<unsigned> &ind)
 {
 	if(ind.empty())
-		return;
+		return *this;
 
 	data.reserve(data.size()+ind.size()*get_index_size());
 	for(vector<unsigned>::const_iterator i=ind.begin(); i!=ind.end(); ++i)
@@ -115,31 +115,40 @@ void Batch::append(const vector<unsigned> &ind)
 
 	update_offset();
 	dirty = true;
+
+	return *this;
 }
 
 bool Batch::can_append(PrimitiveType other_type)
 {
 	if(other_type!=prim_type)
 		return false;
-	else if(prim_type==LINE_STRIP || prim_type==LINE_LOOP || prim_type==TRIANGLE_FAN || prim_type==POLYGON)
-		return NV_primitive_restart;
+	else if(prim_type==LINE_STRIP || prim_type==LINE_LOOP || prim_type==TRIANGLE_FAN)
+		return MSP_primitive_restart || NV_primitive_restart;
 	else
 		return true;
 }
 
-void Batch::append(const Batch &other)
+Batch &Batch::append(const Batch &other)
 {
 	if(other.prim_type!=prim_type)
 		throw invalid_argument("Batch::append");
-	if(prim_type==LINE_STRIP || prim_type==LINE_LOOP || prim_type==TRIANGLE_FAN || prim_type==POLYGON)
-		static Require _req(NV_primitive_restart);
+	if(prim_type==LINE_STRIP || prim_type==LINE_LOOP || prim_type==TRIANGLE_FAN)
+	{
+		if(!MSP_primitive_restart)
+		{
+			static Require _req(NV_primitive_restart);
+			// Make sure we have glEnable/DisableClientState as well
+			static Require _req2(MSP_legacy_features);
+		}
+	}
 
 	if(other.data.empty())
-		return;
+		return *this;
 
 	if(prim_type==POINTS || prim_type==LINES || prim_type==TRIANGLES || prim_type==QUADS)
 		;
-	else if(NV_primitive_restart)
+	else if(MSP_primitive_restart || NV_primitive_restart)
 	{
 		restart = true;
 		if(data_type==UNSIGNED_SHORT)
@@ -170,6 +179,8 @@ void Batch::append(const Batch &other)
 
 	update_offset();
 	dirty = true;
+
+	return *this;
 }
 
 void Batch::append_index(unsigned i)
@@ -195,11 +206,6 @@ void Batch::append_index(unsigned i)
 		data.push_back(i);
 }
 
-void Batch::upload_data() const
-{
-	get_buffer()->sub_data(get_offset(), data.size(), &data[0]);
-}
-
 unsigned Batch::get_index_size() const
 {
 	if(data_type==UNSIGNED_SHORT)
@@ -220,6 +226,27 @@ unsigned Batch::get_index(unsigned i) const
 }
 
 void Batch::draw() const
+{
+	BindRestore _bind_ibuf(get_buffer(), ELEMENT_ARRAY_BUFFER);
+	const void *data_ptr = setup_draw();
+
+	if(EXT_draw_range_elements)
+		glDrawRangeElements(prim_type, min_index, max_index, size(), data_type, data_ptr);
+	else
+		glDrawElements(prim_type, size(), data_type, data_ptr);
+}
+
+void Batch::draw_instanced(unsigned count) const
+{
+	static Require req(ARB_draw_instanced);
+
+	BindRestore _bind_ibuf(get_buffer(), ELEMENT_ARRAY_BUFFER);
+	const void *data_ptr = setup_draw();
+
+	glDrawElementsInstanced(prim_type, size(), data_type, data_ptr, count);
+}
+
+const void *Batch::setup_draw() const
 {
 	if(restart)
 	{
@@ -232,31 +259,48 @@ void Batch::draw() const
 			index = 0xFF;
 
 		if(index!=restart_index)
-		{
-			if(!restart_index)
-				glEnableClientState(GL_PRIMITIVE_RESTART_NV);
-			glPrimitiveRestartIndexNV(index);
-			restart_index = index;
-		}
+			set_restart_index(index);
 	}
 	else if(restart_index && restart_index<=max_index)
-	{
-		glDisableClientState(GL_PRIMITIVE_RESTART_NV);
-		restart_index = 0;
-	}
+		set_restart_index(0);
 
 	if(get_buffer())
 	{
 		if(dirty)
 			update_buffer();
 
-		BufferAlias<ELEMENT_ARRAY_BUFFER> alias(*get_buffer());
-		Bind bind_ibuf(alias, true);
+		return reinterpret_cast<const void *>(get_offset());
+	}
+	else
+		return &data[0];
+}
 
-		glDrawRangeElements(prim_type, min_index, max_index, size(), data_type, reinterpret_cast<void *>(get_offset()));
+void Batch::set_restart_index(unsigned index)
+{
+	if(MSP_primitive_restart)
+	{
+		if(index>0)
+		{
+			if(!restart_index)
+				glEnable(GL_PRIMITIVE_RESTART);
+			glPrimitiveRestartIndex(index);
+		}
+		else
+			glDisable(GL_PRIMITIVE_RESTART);
 	}
 	else
-		glDrawRangeElements(prim_type, min_index, max_index, size(), data_type, &data[0]);
+	{
+		if(index>0)
+		{
+			if(!restart_index)
+				glEnableClientState(GL_PRIMITIVE_RESTART_NV);
+			glPrimitiveRestartIndexNV(index);
+		}
+		else
+			glDisableClientState(GL_PRIMITIVE_RESTART_NV);
+	}
+
+	restart_index = index;
 }