Source Code for Module glitter.textures.sampler

  1  """Sampler class. 
  2   
  3  @todo: Implement getters and setters for C{Sampler.unit}, but take care not to 
  4  confuse any existing bindings on the stack. This problem is very similar to 
  5  rebinding L{buffers<BaseBuffer>} to different targets and should probably be 
  6  handled in a similar way. 
  7   
  8  @author: Stephan Wenger 
  9  @date: 2012-02-29 
 10  """ 
 11   
 12  import glitter.raw as _gl 
 13  from glitter.utils import texture_compare_funcs, texture_compare_modes, texture_min_filters, texture_mag_filters, texture_wrapmodes, ManagedObject, BindableObject 
 14   
 15 -class Sampler(ManagedObject, BindableObject): 
 16      _generate_id = _gl.glGenSamplers 
 17      _delete_id = _gl.glDeleteSamplers 
 18      _db = "samplers" 
 19      _binding = "sampler_binding" 
 20   
 21      compare_funcs = texture_compare_funcs 
 22      compare_modes = texture_compare_modes 
 23      min_filters = texture_min_filters 
 24      mag_filters = texture_mag_filters 
 25      wrapmodes = texture_wrapmodes 
 26   
 27 -    def __init__(self, unit, context=None): 
 28          super(Sampler, self).__init__(context=context) 
 29          if not 0 <= unit < self._context.max_combined_texture_image_units: 
 30              raise ValueError("invalid unit: %s" % unit) 
 31          self._target = unit 
 32   
 33      @property 
 34 -    def compare_func(self): 
 35          _compare_func = _gl.GLint() 
 36          _gl.glGetSamplerParameteriv(self._id, _gl.GL_TEXTURE_COMPARE_FUNC, _gl.pointer(_compare_func)) 
 37          return self.compare_funcs[_compare_func.value] 
 38   
 39      @compare_func.setter 
 40 -    def compare_func(self, compare_func): 
 41          _compare_func = _gl.GLint(self.compare_funcs(compare_func)._value) 
 42          _gl.glSamplerParameteriv(self._id, _gl.GL_TEXTURE_COMPARE_FUNC, _gl.pointer(_compare_func)) 
 43   
 44      @property 
 45 -    def compare_mode(self): 
 46          _compare_mode = _gl.GLint() 
 47          _gl.glGetSamplerParameteriv(self._id, _gl.GL_TEXTURE_COMPARE_MODE, _gl.pointer(_compare_mode)) 
 48          return self.compare_modes[_compare_mode.value] 
 49   
 50      @compare_mode.setter 
 51 -    def compare_mode(self, compare_mode): 
 52          _compare_mode = _gl.GLint(self.compare_modes(compare_mode)._value) 
 53          _gl.glSamplerParameteriv(self._id, _gl.GL_TEXTURE_COMPARE_MODE, _gl.pointer(_compare_mode)) 
 54       
 55      @property 
 56 -    def lod_bias(self): 
 57          _lod_bias = _gl.GLfloat() 
 58          _gl.glGetSamplerParameterfv(self._id, _gl.GL_TEXTURE_LOD_BIAS, _gl.pointer(_lod_bias)) 
 59          return _lod_bias.value 
 60   
 61      @lod_bias.setter 
 62 -    def lod_bias(self, lod_bias): 
 63          _gl.glSamplerParameterfv(self._id, _gl.GL_TEXTURE_LOD_BIAS, _gl.pointer(_gl.GLfloat(lod_bias))) 
 64   
 65      @property 
 66 -    def min_filter(self): 
 67          _min_filter = _gl.GLint() 
 68          _gl.glGetSamplerParameteriv(self._id, _gl.GL_TEXTURE_MIN_FILTER, _gl.pointer(_min_filter)) 
 69          return self.min_filters[_min_filter.value] 
 70   
 71      @min_filter.setter 
 72 -    def min_filter(self, min_filter): 
 73          _min_filter = _gl.GLint(self.min_filters(min_filter)._value) 
 74          _gl.glSamplerParameteriv(self._id, _gl.GL_TEXTURE_MIN_FILTER, _gl.pointer(_min_filter)) 
 75   
 76      @property 
 77 -    def mag_filter(self): 
 78          _mag_filter = _gl.GLint() 
 79          _gl.glGetSamplerParameteriv(self._id, _gl.GL_TEXTURE_MAG_FILTER, _gl.pointer(_mag_filter)) 
 80          return self.mag_filters[_mag_filter.value] 
 81   
 82      @mag_filter.setter 
 83 -    def mag_filter(self, mag_filter): 
 84          _mag_filter = _gl.GLint(self.mag_filters(mag_filter)._value) 
 85          _gl.glSamplerParameteriv(self._id, _gl.GL_TEXTURE_MAG_FILTER, _gl.pointer(_mag_filter)) 
 86   
 87      @property 
 88 -    def min_lod(self): 
 89          _min_lod = _gl.GLint() 
 90          _gl.glGetSamplerParameteriv(self._id, _gl.GL_TEXTURE_MIN_LOD, _gl.pointer(_min_lod)) 
 91          return _min_lod.value 
 92   
 93      @min_lod.setter 
 94 -    def min_lod(self, min_lod): 
 95          _gl.glSamplerParameteriv(self._id, _gl.GL_TEXTURE_MIN_LOD, _gl.pointer(_gl.GLint(min_lod))) 
 96   
 97      @property 
 98 -    def max_lod(self): 
 99          _max_lod = _gl.GLint() 
100          _gl.glGetSamplerParameteriv(self._id, _gl.GL_TEXTURE_MAX_LOD, _gl.pointer(_max_lod)) 
101          return _max_lod.value 
102   
103      @max_lod.setter 
104 -    def max_lod(self, max_lod): 
105          _gl.glSamplerParameteriv(self._id, _gl.GL_TEXTURE_MAX_LOD, _gl.pointer(_gl.GLint(max_lod))) 
106   
107      @property 
108 -    def wrap_s(self): 
109          _wrap_s = _gl.GLint() 
110          _gl.glGetSamplerParameteriv(self._id, _gl.GL_TEXTURE_WRAP_S, _gl.pointer(_wrap_s)) 
111          return self.wrapmodes[_wrap_s.value] 
112   
113      @wrap_s.setter 
114 -    def wrap_s(self, wrap_s): 
115          _wrap_s = _gl.GLint(self.wrapmodes(wrap_s)._value) 
116          _gl.glSamplerParameteriv(self._id, _gl.GL_TEXTURE_WRAP_S, _gl.pointer(_wrap_s)) 
117   
118      @property 
119 -    def wrap_t(self): 
120          _wrap_t = _gl.GLint() 
121          _gl.glGetSamplerParameteriv(self._id, _gl.GL_TEXTURE_WRAP_T, _gl.pointer(_wrap_t)) 
122          return self.wrapmodes[_wrap_t.value] 
123   
124      @wrap_t.setter 
125 -    def wrap_t(self, wrap_t): 
126          _wrap_t = _gl.GLint(self.wrapmodes(wrap_t)._value) 
127          _gl.glSamplerParameteriv(self._id, _gl.GL_TEXTURE_WRAP_T, _gl.pointer(_wrap_t)) 
128   
129      @property 
130 -    def wrap_r(self): 
131          _wrap_r = _gl.GLint() 
132          _gl.glGetSamplerParameteriv(self._id, _gl.GL_TEXTURE_WRAP_R, _gl.pointer(_wrap_r)) 
133          return self.wrapmodes[_wrap_r.value] 
134   
135      @wrap_r.setter 
136 -    def wrap_r(self, wrap_r): 
137          _wrap_r = _gl.GLint(self.wrapmodes(wrap_r)._value) 
138          _gl.glSamplerParameteriv(self._id, _gl.GL_TEXTURE_WRAP_R, _gl.pointer(_wrap_r)) 
139   
140  __all__ = ["Sampler"] 
141