X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fbatch.cpp;h=a59fad99f03b988309ef60042324df71ebf3c6ab;hp=375c52e9ca25da98131f76924eb457b80bf9f255;hb=f50822b9e73a6ecdacbc4af4c4d9aba435a72386;hpb=69bd7cdfb824c9189ef89e112222141c28b163f6

diff --git a/source/batch.cpp b/source/batch.cpp
index 375c52e9..a59fad99 100644
--- a/source/batch.cpp
+++ b/source/batch.cpp
@@ -1,14 +1,54 @@
+#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 "extension.h"
-#include "nv_primitive_restart.h"
+#include "mesh.h"
 #include "vertexarray.h"
-#include "version_1_2.h"
 
 using namespace std;
 
+namespace {
+
+template<typename T>
+void append(vector<unsigned char> &data, T i)
+{
+	data.insert(data.end(), sizeof(T), 0);
+	*(T *)(&data[data.size()-sizeof(T)]) = i;
+}
+
+template<typename T, typename U>
+U convert(T n)
+{
+	if(!static_cast<T>(~n))
+		return ~0;
+	else
+		return n;
+}
+
+template<typename T, typename U>
+void expand(vector<unsigned char> &data)
+{
+	unsigned count = data.size()/sizeof(T);
+	data.resize(count*sizeof(U));
+	for(unsigned i=count; i--;)
+		*(U *)(&data[i*sizeof(U)]) = convert<T, U>(*(T *)(&data[i*sizeof(T)]));
+}
+
+template<typename T, typename U>
+void shrink(vector<unsigned char> &data)
+{
+	unsigned count = data.size()/sizeof(T);
+	for(unsigned i=0; i<count; ++i)
+		*(U *)(&data[i*sizeof(U)]) = convert<T, U>(*(T *)(&data[i*sizeof(T)]));
+	data.resize(count*sizeof(U));
+}
+
+}
+
 namespace Msp {
 namespace GL {
 
@@ -19,21 +59,11 @@ Batch::Batch(PrimitiveType t):
 	data_type(UNSIGNED_BYTE),
 	min_index(0),
 	max_index(0),
-	restart(false),
-	ibuf(0),
-	ibuf_offset(0),
-	next_in_ibuf(0),
-	prev_in_ibuf(0),
-	dirty(false)
-{
-	/* XXX Should probably provide a fallback to glDrawElements since this class
-	is pretty much required to render anything. */
-	static RequireVersion _ver(1, 2);
-}
+	restart(false)
+{ }
 
 Batch::~Batch()
 {
-	unlink_from_ibuf();
 }
 
 void Batch::set_data_type(DataType t)
@@ -46,137 +76,84 @@ void Batch::set_data_type(DataType t)
 		throw invalid_operation("Batch::set_data_type");
 
 	if(data_type==UNSIGNED_BYTE && t==UNSIGNED_SHORT)
-		expand_data<unsigned char, unsigned short>();
+		expand<unsigned char, unsigned short>(data);
 	else if(data_type==UNSIGNED_BYTE && t==UNSIGNED_INT)
-		expand_data<unsigned char, unsigned>();
+		expand<unsigned char, unsigned>(data);
 	else if(data_type==UNSIGNED_SHORT && t==UNSIGNED_INT)
-		expand_data<unsigned short, unsigned>();
+		expand<unsigned short, unsigned>(data);
 	else if(data_type==UNSIGNED_INT && t==UNSIGNED_BYTE)
-		shrink_data<unsigned, unsigned char>();
+		shrink<unsigned, unsigned char>(data);
 	else if(data_type==UNSIGNED_INT && t==UNSIGNED_SHORT)
-		shrink_data<unsigned, unsigned short>();
+		shrink<unsigned, unsigned short>(data);
 	else if(data_type==UNSIGNED_SHORT && t==UNSIGNED_BYTE)
-		shrink_data<unsigned short, unsigned char>();
+		shrink<unsigned short, unsigned char>(data);
 
 	data_type = t;
-	update_ibuf_offsets();
-	dirty = true;
-}
-
-void Batch::use_index_buffer(Buffer *buf, Batch *prev)
-{
-	if(buf && prev && prev->ibuf!=buf)
-		throw invalid_argument("Batch::use_index_buffer");
-
-	if(!buf)
-	{
-		prev = 0;
-		unlink_from_ibuf();
-	}
-
-	ibuf = buf;
-	prev_in_ibuf = prev;
-	next_in_ibuf = 0;
-	if(prev)
-	{
-		prev->next_in_ibuf = this;
-		ibuf_offset = prev->ibuf_offset+prev->data.size();
-	}
-	else
-		ibuf_offset = 0;
-
+	update_offset();
 	dirty = true;
 }
 
 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);
-	}
+	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);
-
-	if(data_type==UNSIGNED_SHORT)
-		append_index<unsigned short>(i);
-	else if(data_type==UNSIGNED_INT)
-		append_index<unsigned>(i);
-	else
-		data.push_back(i);
-	
-	update_ibuf_offsets();
+	update_offset();
 	dirty = true;
 
 	return *this;
 }
 
-void Batch::append(const vector<unsigned> &ind)
+Batch &Batch::append(const vector<unsigned> &ind)
 {
 	if(ind.empty())
-		return;
-
-	if(data.empty())
-		min_index = max_index = ind.front();
+		return *this;
 
+	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];
-	}
+	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)
+		return MSP_primitive_restart || NV_primitive_restart;
 	else
-	{
-		for(unsigned i=0; i<ind.size(); ++i)
-			data[base+i] = ind[i];
-	}
+		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)
-		throw incompatible_data("Batch::append");
-	else if(prim_type==POLYGON)
-		throw incompatible_data("Batch::append");
-	else if(prim_type==TRIANGLE_FAN)
-		static RequireExtension _ext("GL_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(is_supported("GL_NV_primitive_restart"))
+	if(prim_type==POINTS || prim_type==LINES || prim_type==TRIANGLES || prim_type==QUADS)
+		;
+	else if(MSP_primitive_restart || NV_primitive_restart)
 	{
 		restart = true;
 		if(data_type==UNSIGNED_SHORT)
-			append_index<unsigned short>(0xFFFF);
+			::append<unsigned short>(data, 0xFFFF);
 		else if(data_type==UNSIGNED_INT)
-			append_index<unsigned>(0xFFFFFFFF);
+			::append<unsigned>(data, 0xFFFFFFFF);
 		else
 			data.push_back(0xFF);
 	}
@@ -197,62 +174,35 @@ 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;
+
+	return *this;
 }
 
-void Batch::draw() const
+void Batch::append_index(unsigned i)
 {
-	if(restart)
-	{
-		unsigned index;
-		if(data_type==UNSIGNED_SHORT)
-			index = 0xFFFF;
-		else if(data_type==UNSIGNED_INT)
-			index = 0xFFFFFFFF;
-		else
-			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)
+	if(data.empty())
+		min_index = max_index = i;
+	else
 	{
-		glDisableClientState(GL_PRIMITIVE_RESTART_NV);
-		restart_index = 0;
+		min_index = min(min_index, i);
+		max_index = max(max_index, i);
 	}
 
-	if(ibuf)
-	{
-		if(dirty)
-		{
-			const Batch *b = this;
-			for(; b->prev_in_ibuf; b=b->prev_in_ibuf) ;
-
-			unsigned chain_size = 0;
-			for(const Batch *a=b; a; a=a->next_in_ibuf)
-				chain_size += a->data.size();
-
-			ibuf->data(chain_size, 0);
-
-			for(; b; b=b->next_in_ibuf)
-			{
-				ibuf->sub_data(b->ibuf_offset, b->data.size(), &b->data[0]);
-				b->dirty = false;
-			}
-		}
-
-		BufferAlias<ELEMENT_ARRAY_BUFFER> alias(*ibuf);
-		Bind bind_ibuf(alias, true);
+	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);
 
-		glDrawRangeElements(prim_type, min_index, max_index, size(), data_type, reinterpret_cast<void *>(ibuf_offset));
-	}
+	if(data_type==UNSIGNED_SHORT)
+		::append<unsigned short>(data, i);
+	else if(data_type==UNSIGNED_INT)
+		::append<unsigned>(data, i);
 	else
-		glDrawRangeElements(prim_type, min_index, max_index, size(), data_type, &data[0]);
+		data.push_back(i);
 }
 
 unsigned Batch::get_index_size() const
@@ -264,13 +214,6 @@ unsigned Batch::get_index_size() const
 	return sizeof(unsigned char);
 }
 
-template<typename T>
-void Batch::append_index(T i)
-{
-	data.insert(data.end(), sizeof(T), 0);
-	*(T *)(&data[data.size()-sizeof(T)]) = i;
-}
-
 unsigned Batch::get_index(unsigned i) const
 {
 	if(data_type==UNSIGNED_SHORT)
@@ -281,53 +224,72 @@ unsigned Batch::get_index(unsigned i) const
 		return data[i];
 }
 
-template<typename T, typename U>
-void Batch::expand_data()
+void Batch::draw() const
 {
-	unsigned count = data.size()/sizeof(T);
-	data.resize(count*sizeof(U));
-	for(unsigned i=count; i--;)
-		*(U *)(&data[i*sizeof(U)]) = convert<T, U>(*(T *)(&data[i*sizeof(T)]));
-}
+	BindRestore _bind_ibuf(get_buffer(), ELEMENT_ARRAY_BUFFER);
+	const void *data_ptr = setup_draw();
 
-template<typename T, typename U>
-void Batch::shrink_data()
-{
-	unsigned count = data.size()/sizeof(T);
-	for(unsigned i=0; i<count; ++i)
-		*(U *)(&data[i*sizeof(U)]) = convert<T, U>(*(T *)(&data[i*sizeof(T)]));
-	data.resize(count*sizeof(U));
+	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);
 }
 
-template<typename T, typename U>
-U Batch::convert(T i) const
+const void *Batch::setup_draw() const
 {
-	if(!static_cast<T>(~i))
-		return ~0;
+	if(restart)
+	{
+		unsigned index;
+		if(data_type==UNSIGNED_SHORT)
+			index = 0xFFFF;
+		else if(data_type==UNSIGNED_INT)
+			index = 0xFFFFFFFF;
+		else
+			index = 0xFF;
+
+		if(index!=restart_index)
+			set_restart_index(index);
+	}
+	else if(restart_index && restart_index<=max_index)
+		set_restart_index(0);
+
+	if(get_buffer())
+	{
+		if(dirty)
+			update_buffer();
+
+		return reinterpret_cast<const void *>(get_offset());
+	}
 	else
-		return i;
+		return &data[0];
 }
 
-void Batch::unlink_from_ibuf()
+void Batch::set_restart_index(unsigned index)
 {
-	if(next_in_ibuf)
-		next_in_ibuf->prev_in_ibuf = prev_in_ibuf;
-	if(prev_in_ibuf)
+	if(MSP_primitive_restart)
 	{
-		prev_in_ibuf->next_in_ibuf = next_in_ibuf;
-		prev_in_ibuf->update_ibuf_offsets();
+		if(index>0)
+		{
+			if(!restart_index)
+				glEnable(GL_PRIMITIVE_RESTART);
+			glPrimitiveRestartIndex(index);
+		}
+		else
+			glDisable(GL_PRIMITIVE_RESTART);
 	}
-	else if(next_in_ibuf)
+	else
 	{
-		next_in_ibuf->ibuf_offset = 0;
-		next_in_ibuf->update_ibuf_offsets();
+		if(index>0)
+		{
+			if(!restart_index)
+				glEnableClientState(GL_PRIMITIVE_RESTART_NV);
+			glPrimitiveRestartIndexNV(index);
+		}
+		else
+			glDisableClientState(GL_PRIMITIVE_RESTART_NV);
 	}
-}
 
-void Batch::update_ibuf_offsets()
-{
-	for(Batch *b=this; b->next_in_ibuf; b=b->next_in_ibuf)
-		b->next_in_ibuf->ibuf_offset = b->ibuf_offset+b->data.size();
+	restart_index = index;
 }