-#include "extension.h"
+#include <stdexcept>
+#include <msp/gl/extensions/arb_multitexture.h>
+#include <msp/gl/extensions/arb_vertex_shader.h>
#include "gl.h"
#include "texunit.h"
-#include "version_1_3.h"
using namespace std;
TexUnit::TexUnit():
texture(0),
texenv(0)
-{ }
+{
+ fill(texgen, texgen+4, static_cast<const TexGen *>(0));
+}
bool TexUnit::set_texture(const Texture *tex)
{
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];
+}
+
unsigned TexUnit::get_n_units()
{
static int count = -1;
if(count<0)
{
- if(is_version_at_least(2, 0) || is_supported("ARB_vertex_shader"))
+ if(ARB_vertex_shader)
glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &count);
- else if(is_version_at_least(1, 3))
+ else if(ARB_multitexture)
glGetIntegerv(GL_MAX_TEXTURE_UNITS, &count);
else
count = 1;
TexUnit &TexUnit::activate(unsigned n)
{
+ if(n>0)
+ static Require _req(ARB_multitexture);
if(n>=get_n_units())
- throw InvalidParameterValue("Invalid texture unit number");
+ throw out_of_range("TexUnit::activate");
if(units.size()<=n)
units.resize(n+1);