X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fbatch.cpp;h=3d7dfc720ad901d40832e77510d3159339910e29;hp=d4b6497fc980bbab71bf9caf794302c26ec04014;hb=6a045019fbd68738b77849629e6dfd3dfd9a4d93;hpb=7398ee7ebbd8b7e56c721a85cbe721b79758d09a

diff --git a/source/batch.cpp b/source/batch.cpp
index d4b6497f..3d7dfc72 100644
--- a/source/batch.cpp
+++ b/source/batch.cpp
@@ -1,9 +1,12 @@
+#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 "ext_draw_range_elements.h"
-#include "nv_primitive_restart.h"
+#include "mesh.h"
 #include "vertexarray.h"
 
 using namespace std;
@@ -58,9 +61,10 @@ Batch::Batch(PrimitiveType t):
 	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);
+	/* Make sure we have glEnable/DisableClientState to go with
+	NV_primitive_restart */
+	if(!MSP_primitive_restart && NV_primitive_restart)
+		(bool)MSP_legacy_features;
 }
 
 Batch::~Batch()
@@ -96,26 +100,8 @@ void Batch::set_data_type(DataType t)
 
 Batch &Batch::append(unsigned i)
 {
-	if(data.empty())
-		min_index = max_index = i;
-	else
-	{
-		min_index = min(min_index, i);
-		max_index = max(max_index, i);
-	}
-
-	if((data_type==UNSIGNED_BYTE || data_type==UNSIGNED_SHORT) && max_index>0xFFFE)
-		set_data_type(UNSIGNED_INT);
-	else if(data_type==UNSIGNED_BYTE && max_index>0xFE)
-		set_data_type(UNSIGNED_SHORT);
+	append_index(i);
 
-	if(data_type==UNSIGNED_SHORT)
-		::append<unsigned short>(data, i);
-	else if(data_type==UNSIGNED_INT)
-		::append<unsigned>(data, i);
-	else
-		data.push_back(i);
-	
 	update_offset();
 	dirty = true;
 
@@ -127,55 +113,40 @@ void Batch::append(const vector<unsigned> &ind)
 	if(ind.empty())
 		return;
 
-	if(data.empty())
-		min_index = max_index = ind.front();
-
+	data.reserve(data.size()+ind.size()*get_index_size());
 	for(vector<unsigned>::const_iterator i=ind.begin(); i!=ind.end(); ++i)
-	{
-		min_index = min(min_index, *i);
-		max_index = max(max_index, *i);
-	}
+		append_index(*i);
 
-	if((data_type==UNSIGNED_BYTE || data_type==UNSIGNED_SHORT) && max_index>0xFFFE)
-		set_data_type(UNSIGNED_INT);
-	else if(data_type==UNSIGNED_BYTE && max_index>0xFE)
-		set_data_type(UNSIGNED_SHORT);
+	update_offset();
+	dirty = true;
+}
 
-	unsigned base = data.size();
-	data.resize(data.size()+ind.size()*get_index_size());
-	if(data_type==UNSIGNED_SHORT)
-	{
-		unsigned short *ptr = reinterpret_cast<unsigned short *>(&data[base]);
-		for(unsigned i=0; i<ind.size(); ++i)
-			ptr[i] = ind[i];
-	}
-	else if(data_type==UNSIGNED_INT)
-	{
-		unsigned *ptr = reinterpret_cast<unsigned *>(&data[base]);
-		for(unsigned i=0; i<ind.size(); ++i)
-			ptr[i] = ind[i];
-	}
+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)
+		return MSP_primitive_restart || NV_primitive_restart;
 	else
-	{
-		for(unsigned i=0; i<ind.size(); ++i)
-			data[base+i] = ind[i];
-	}
-	dirty = true;
+		return true;
 }
 
 void 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);
+	}
 
 	if(other.data.empty())
 		return;
 
 	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)
@@ -202,12 +173,33 @@ void Batch::append(const Batch &other)
 
 	unsigned count = other.size();
 	for(unsigned i=0; i<count; ++i)
-		append(other.get_index(i));
+		append_index(other.get_index(i));
+
+	update_offset();
+	dirty = true;
 }
 
-void Batch::upload_data() const
+void Batch::append_index(unsigned i)
 {
-	get_buffer()->sub_data(get_offset(), data.size(), &data[0]);
+	if(data.empty())
+		min_index = max_index = i;
+	else
+	{
+		min_index = min(min_index, i);
+		max_index = max(max_index, i);
+	}
+
+	if((data_type==UNSIGNED_BYTE || data_type==UNSIGNED_SHORT) && max_index>0xFFFE)
+		set_data_type(UNSIGNED_INT);
+	else if(data_type==UNSIGNED_BYTE && max_index>0xFE)
+		set_data_type(UNSIGNED_SHORT);
+
+	if(data_type==UNSIGNED_SHORT)
+		::append<unsigned short>(data, i);
+	else if(data_type==UNSIGNED_INT)
+		::append<unsigned>(data, i);
+	else
+		data.push_back(i);
 }
 
 unsigned Batch::get_index_size() const
@@ -242,31 +234,56 @@ void Batch::draw() const
 			index = 0xFF;
 
 		if(index!=restart_index)
-		{
-			if(!restart_index)
-				glEnableClientState(GL_PRIMITIVE_RESTART_NV);
-			glPrimitiveRestartIndexNV(index);
-			restart_index = index;
-		}
-	}
-	else if(restart_index && restart_index<max_index)
-	{
-		glDisableClientState(GL_PRIMITIVE_RESTART_NV);
-		restart_index = 0;
+			set_restart_index(index);
 	}
+	else if(restart_index && restart_index<=max_index)
+		set_restart_index(0);
 
-	if(get_buffer())
+	Buffer *ibuf = get_buffer();
+	const void *data_ptr;
+	BindRestore _bind_ibuf(ibuf, ELEMENT_ARRAY_BUFFER);
+	if(ibuf)
 	{
 		if(dirty)
 			update_buffer();
 
-		BufferAlias<ELEMENT_ARRAY_BUFFER> alias(*get_buffer());
-		Bind bind_ibuf(alias, true);
+		data_ptr = reinterpret_cast<const void *>(get_offset());
+	}
+	else
+		data_ptr = &data[0];
 
-		glDrawRangeElements(prim_type, min_index, max_index, size(), data_type, reinterpret_cast<void *>(get_offset()));
+	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::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;
 }