+DataType Texture::get_alloc_type(PixelFormat fmt)
+{
+ return (get_base_pixelformat(fmt)==DEPTH_COMPONENT ? UNSIGNED_SHORT : UNSIGNED_BYTE);
+}
+
+void Texture::set_internal_format(PixelFormat fmt)
+{
+ FormatSwizzle swiz = NO_SWIZZLE;
+ if(ARB_texture_rg && ARB_texture_swizzle)
+ {
+ if(fmt==LUMINANCE)
+ {
+ fmt = RED;
+ swiz = R_TO_LUMINANCE;
+ }
+ else if(fmt==LUMINANCE_ALPHA)
+ {
+ fmt = RG;
+ swiz = RG_TO_LUMINANCE_ALPHA;
+ }
+ }
+
+ if(!get_component_size(fmt) && OES_required_internalformat)
+ fmt = get_default_sized_pixelformat(fmt);
+
+ require_pixelformat(fmt);
+ ifmt = fmt;
+ swizzle = swiz;
+ if(swizzle)
+ update_parameter(FORMAT_SWIZZLE);
+}
+
+PixelFormat Texture::get_upload_format(PixelFormat fmt) const
+{
+ if(fmt==LUMINANCE || fmt==LUMINANCE_ALPHA)
+ return get_base_pixelformat(ifmt);
+ else
+ return fmt;
+}
+
+void Texture::update_parameter(int mask) const
+{
+ if(!ARB_direct_state_access && TexUnit::current().get_texture()!=this)
+ {
+ TexUnit *unit = TexUnit::find_unit(this);
+ if(!unit)
+ {
+ dirty_params |= mask;
+ return;
+ }
+
+ unit->bind();
+ }
+
+ if(mask&MIN_FILTER)
+ set_parameter_i(GL_TEXTURE_MIN_FILTER, min_filter);
+ if(mask&MAG_FILTER)
+ set_parameter_i(GL_TEXTURE_MAG_FILTER, mag_filter);
+ if(mask&MAX_ANISOTROPY)
+ set_parameter_f(GL_TEXTURE_MAX_ANISOTROPY_EXT, max_anisotropy);
+ if(mask&WRAP_S)
+ set_parameter_i(GL_TEXTURE_WRAP_S, wrap_s);
+ if(mask&WRAP_T)
+ set_parameter_i(GL_TEXTURE_WRAP_T, wrap_t);
+ if(mask&WRAP_R)
+ set_parameter_i(GL_TEXTURE_WRAP_R, wrap_r);
+ if(mask&COMPARE)
+ set_parameter_i(GL_TEXTURE_COMPARE_MODE, (compare ? GL_COMPARE_R_TO_TEXTURE : GL_NONE));
+ if(mask&COMPARE_FUNC)
+ set_parameter_i(GL_TEXTURE_COMPARE_FUNC, cmp_func);
+ if(mask&FORMAT_SWIZZLE)
+ {
+ if(get_gl_api()==OPENGL_ES2)
+ {
+ set_parameter_i(GL_TEXTURE_SWIZZLE_R, swizzle_orders[swizzle*4]);
+ set_parameter_i(GL_TEXTURE_SWIZZLE_G, swizzle_orders[swizzle*4+1]);
+ set_parameter_i(GL_TEXTURE_SWIZZLE_B, swizzle_orders[swizzle*4+2]);
+ set_parameter_i(GL_TEXTURE_SWIZZLE_A, swizzle_orders[swizzle*4+3]);
+ }
+ else
+ {
+ if(ARB_direct_state_access)
+ glTextureParameteriv(id, GL_TEXTURE_SWIZZLE_RGBA, swizzle_orders+swizzle*4);
+ else
+ glTexParameteriv(target, GL_TEXTURE_SWIZZLE_RGBA, swizzle_orders+swizzle*4);
+ }
+ }
+ if(mask&MIPMAP_LEVELS)
+ set_parameter_i(GL_TEXTURE_MAX_LEVEL, (mipmap_levels ? mipmap_levels-1 : 1000));
+}
+
+void Texture::set_parameter_i(GLenum param, int value) const
+{
+ if(ARB_direct_state_access)
+ glTextureParameteri(id, param, value);
+ else
+ glTexParameteri(target, param, value);
+}
+
+void Texture::set_parameter_f(GLenum param, float value) const
+{
+ if(ARB_direct_state_access)
+ glTextureParameterf(id, param, value);
+ else
+ glTexParameterf(target, param, value);
+}
+
+void Texture::set_min_filter(TextureFilter f)
+{
+ min_filter = f;
+ update_parameter(MIN_FILTER);
+}
+
+void Texture::set_mag_filter(TextureFilter f)
+{
+ mag_filter = f;
+ update_parameter(MAG_FILTER);
+}
+
+void Texture::set_filter(TextureFilter f)
+{
+ set_min_filter(f);
+ set_mag_filter(f==NEAREST ? NEAREST : LINEAR);
+}
+
+void Texture::set_mipmap_levels(unsigned l)
+{
+ mipmap_levels = l;
+ update_parameter(MIPMAP_LEVELS);
+}
+
+void Texture::set_max_anisotropy(float a)
+{
+ if(a<1.0f)
+ throw invalid_argument("Texture::set_max_anisotropy");
+ else if(a>1.0f)
+ static Require _req(EXT_texture_filter_anisotropic);
+ max_anisotropy = a;
+ if(EXT_texture_filter_anisotropic)
+ update_parameter(MAX_ANISOTROPY);
+}
+
+void Texture::set_wrap(TextureWrap w)
+{
+ set_wrap_s(w);
+ set_wrap_t(w);
+ if(EXT_texture3D)
+ set_wrap_r(w);
+}
+
+void Texture::set_wrap_s(TextureWrap w)
+{
+ wrap_s = w;
+ update_parameter(WRAP_S);
+}
+
+void Texture::set_wrap_t(TextureWrap w)
+{
+ wrap_t = w;
+ update_parameter(WRAP_T);
+}
+
+void Texture::set_wrap_r(TextureWrap w)
+{
+ static Require _req(EXT_texture3D);
+ wrap_r = w;
+ update_parameter(WRAP_R);
+}
+
+bool Texture::can_generate_mipmap()
+{
+ return EXT_framebuffer_object;
+}
+
+void Texture::generate_mipmap()
+{
+ // glGenerateMipmap is defined here
+ static Require _req(EXT_framebuffer_object);
+
+ if(ARB_direct_state_access)
+ glGenerateTextureMipmap(id);
+ else
+ {
+ BindRestore _bind(this);
+ glGenerateMipmap(target);
+ }
+}
+
+void Texture::set_auto_generate_mipmap(bool gm)