Don't enable/disable textures on non-legacy units

[libs/gl.git] / source / texunit.cpp

diff --git a/source/texunit.cpp b/source/texunit.cpp
index 9b905120db6861d54204b172264d58c6f5340383..74a23246b368ac6ad3b6b3d69765c5f6d4bbd82e 100644 (file)
--- a/source/texunit.cpp
+++ b/source/texunit.cpp
@@ -1,6 +1,7 @@
 #include <stdexcept>
 #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"
@@ -14,6 +15,7 @@ vector<TexUnit> TexUnit::units;
 TexUnit *TexUnit::cur_unit = 0;
 
 TexUnit::TexUnit():
+       legacy(false),
        texture(0)
 { }
 
@@ -46,6 +48,19 @@ unsigned TexUnit::get_n_units()
        return count;
 }
 
+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)
@@ -56,9 +71,13 @@ TexUnit &TexUnit::get_unit(unsigned n)
        if(units.size()<=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];