+#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"
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()
{
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)
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)
- return NV_primitive_restart;
+ 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)
- static Require _req(NV_primitive_restart);
+ {
+ 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)
update_offset();
dirty = true;
+
+ return *this;
}
void Batch::append_index(unsigned i)
}
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)
{
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);
- Buffer *ibuf = get_buffer();
- BindRestore _bind_ibuf(ibuf, ELEMENT_ARRAY_BUFFER);
- if(ibuf)
+ if(get_buffer())
{
if(dirty)
update_buffer();
- glDrawRangeElements(prim_type, min_index, max_index, size(), data_type, reinterpret_cast<void *>(get_offset()));
+ return reinterpret_cast<const void *>(get_offset());
}
else
- glDrawRangeElements(prim_type, min_index, max_index, size(), data_type, &data[0]);
+ return &data[0];
+}
+
+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
+ {
+ if(index>0)
+ {
+ if(!restart_index)
+ glEnableClientState(GL_PRIMITIVE_RESTART_NV);
+ glPrimitiveRestartIndexNV(index);
+ }
+ else
+ glDisableClientState(GL_PRIMITIVE_RESTART_NV);
+ }
+
+ restart_index = index;
}