#include <stdexcept>
-#include "arb_multitexture.h"
-#include "arb_vertex_shader.h"
+#include <msp/gl/extensions/arb_multitexture.h>
+#include <msp/gl/extensions/arb_vertex_shader.h>
+#include <msp/gl/extensions/msp_legacy_features.h>
#include "gl.h"
+#include "misc.h"
#include "texunit.h"
using namespace std;
TexUnit *TexUnit::cur_unit = 0;
TexUnit::TexUnit():
+ legacy(false),
texture(0),
- texenv(0)
-{
- fill(texgen, texgen+4, static_cast<const TexGen *>(0));
-}
+ tex_legacy(false)
+{ }
-bool TexUnit::set_texture(const Texture *tex)
+bool TexUnit::set_texture(const Texture *tex, bool lgc)
{
- bool result = (tex!=texture);
+ lgc = (lgc && legacy && tex);
+ bool result = (tex!=texture || lgc!=tex_legacy);
texture = tex;
+ tex_legacy = lgc;
return result;
}
-bool TexUnit::set_texenv(const TexEnv *env)
+void TexUnit::bind()
{
- bool result = (texenv!=env);
- texenv = env;
- return result;
-}
-
-bool TexUnit::set_texgen(unsigned i, const TexGen *gen)
-{
- if(i>=4)
- throw out_of_range("TexUnit::set_texgen");
- bool result = (texgen[i]!=gen);
- texgen[i] = gen;
- return result;
-}
-
-const TexGen *TexUnit::get_texgen(unsigned i)
-{
- if(i>=4)
- throw out_of_range("TexUnit::get_texgen");
- return texgen[i];
+ if(cur_unit!=this && (cur_unit || index))
+ glActiveTexture(GL_TEXTURE0+index);
+ cur_unit = this;
}
unsigned TexUnit::get_n_units()
if(count<0)
{
if(ARB_vertex_shader)
- glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &count);
+ count = get_i(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS);
else if(ARB_multitexture)
- glGetIntegerv(GL_MAX_TEXTURE_UNITS, &count);
+ count = get_i(GL_MAX_TEXTURE_UNITS);
else
count = 1;
}
return count;
}
-TexUnit &TexUnit::activate(unsigned n)
+unsigned TexUnit::get_n_legacy_units()
+{
+ static int count = -1;
+ if(count<0)
+ {
+ if(MSP_legacy_features)
+ count = get_i(GL_MAX_TEXTURE_UNITS);
+ else
+ count = 0;
+ }
+ return count;
+}
+
+TexUnit &TexUnit::get_unit(unsigned n)
{
if(n>0)
static Require _req(ARB_multitexture);
if(n>=get_n_units())
- throw out_of_range("TexUnit::activate");
+ throw out_of_range("TexUnit::get_unit");
if(units.size()<=n)
- units.resize(n+1);
-
- if(cur_unit!=&units[n] && (cur_unit || n))
- glActiveTexture(GL_TEXTURE0+n);
- cur_unit = &units[n];
+ {
+ unsigned i = units.size();
+ unsigned n_legacy = get_n_legacy_units();
+ units.resize(n+1, TexUnit());
+ for(; i<units.size(); ++i)
+ {
+ units[i].index = i;
+ units[i].legacy = (i<n_legacy);
+ }
+ }
return units[n];
}
TexUnit &TexUnit::current()
{
if(!cur_unit)
- return activate(0);
+ get_unit(0).bind();
return *cur_unit;
}
+TexUnit *TexUnit::find_unit(const Texture *tex)
+{
+ for(vector<TexUnit>::iterator i=units.begin(); i!=units.end(); ++i)
+ if(i->texture==tex)
+ return &*i;
+ return 0;
+}
+
} // namespace GL
} // namespace Msp