add setters and getters for texture base/max level to TextureBase

include/ACGL/OpenGL/Objects/Texture.hh

@@ -110,6 +110,8 @@ public:
     inline GLenum  getInternalFormat (void) const { return mInternalFormat; }
     inline GLint   getMinFilter      (void) const { return getParameterI(GL_TEXTURE_MIN_FILTER); }
     inline GLint   getMagFilter      (void) const { return getParameterI(GL_TEXTURE_MAG_FILTER); }
+    inline GLint   getBaseLevel      (void) const { return getParameterI(GL_TEXTURE_BASE_LEVEL); }
+    inline GLint   getMaxLevel       (void) const { return getParameterI(GL_TEXTURE_MAX_LEVEL); }
     inline GLint   getMinLOD         (void) const { return getParameterI(GL_TEXTURE_MIN_LOD); }
     inline GLint   getMaxLOD         (void) const { return getParameterI(GL_TEXTURE_MAX_LOD); }
     inline GLfloat getLODBias        (void) const { return getParameterF(GL_TEXTURE_LOD_BIAS); }
@@ -156,6 +158,12 @@ public:
     void setWrap(GLenum _wrapS, GLenum _wrapT = 0, GLenum _wrapR = 0);
 #endif
 
+    //! lowest defined mipmap level
+    void setBaseLevel(  GLint _level = -1000 );
+
+    //! highest defined mipmap level
+    void setMaxLevel(  GLint _level =  1000 );
+
     //! lowest mipmap level to use
     void setMinLOD(  GLint _lod = -1000 );
 

src/ACGL/OpenGL/Objects/Texture.cc

@@ -62,6 +62,20 @@ void TextureBase::setWrap( GLenum _wrapS, GLenum _wrapT, GLenum _wrapR )
 }
 #endif // ACGL_OPENGLES_VERSION_20
 
+void TextureBase::setBaseLevel(  GLint _level )
+{
+    GLuint prevTexture = bindAndGetOldTexture();
+    glTexParameteri( mTarget, GL_TEXTURE_BASE_LEVEL, _level);
+    glBindTexture(mTarget, prevTexture);
+}
+
+void TextureBase::setMaxLevel(  GLint _level )
+{
+    GLuint prevTexture = bindAndGetOldTexture();
+    glTexParameteri( mTarget, GL_TEXTURE_MAX_LEVEL, _level);
+    glBindTexture(mTarget, prevTexture);
+}
+
 void TextureBase::setMinLOD(  GLint _lod )
 {
     GLuint prevTexture = bindAndGetOldTexture();