/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
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revision 2552 by jonathan, Fri Jan 28 15:54:00 2005 UTC revision 2571 by jonathan, Fri Feb 18 14:54:17 2005 UTC
# Line 43  from math import floor Line 43  from math import floor
43    
44  from types import StringType  from types import StringType
45    
46    from Thuban.version import versions
47    
48    if Thuban.Model.resource.has_gdal_support():
49        from gdalwarp import ProjectRasterFile
50    
51    
52  # Map the strings used for the format parameter of the draw_raster_data  # Map the strings used for the format parameter of the draw_raster_data
53  # method to the appropriate wxWindows constants  # method to the appropriate wxWindows constants
# Line 92  class MapRenderer(BaseRenderer): Line 97  class MapRenderer(BaseRenderer):
97          if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE          if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE
98              and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)):              and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)):
99              offx, offy = self.offset              offx, offy = self.offset
100                x = lambda a, b, c, d: None
101                #return (True, x, None)
102              return (True, draw_polygon_shape,              return (True, draw_polygon_shape,
103                      draw_polygon_init(layer.ShapeStore().Shapefile(),                      draw_polygon_init(layer.ShapeStore().Shapefile(),
104                                        self.dc, self.map.projection,                                        self.dc, self.map.projection,
# Line 104  class MapRenderer(BaseRenderer): Line 111  class MapRenderer(BaseRenderer):
111          return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL,          return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL,
112                        wxNORMAL)                        wxNORMAL)
113    
114        def projected_raster_layer(self, layer, srcProj, dstProj, extents,
115                                   resolution, dimensions, options):
116    
117            ret = None
118    
119            if Thuban.Model.resource.has_gdal_support():
120    
121                if versions['wxPython-tuple'] < (2,5,3):
122                    options = options | 4  # INVERT_MASK_BITS
123                    options = options & ~2 # ALPHA_MASK not supported
124    
125                try:
126                    ret = ProjectRasterFile(layer.GetImageFilename(),
127                                            srcProj, dstProj,
128                                            extents, resolution, dimensions,
129                                            options)
130                except (MemoryError, IOError, AttributeError, ValueError):
131                    # Why does this catch AttributeError and ValueError?
132                    # FIXME: The exception should be communicated to the user
133                    # better.
134                    traceback.print_exc()
135    
136            return ret
137    
138      def draw_raster_data(self, x,y, data, format = 'BMP'):      def draw_raster_data(self, x,y, data, format = 'BMP'):
139    
140          mask = None          mask = None
141            width = data[0]
142            height = data[1]
143            image_data, mask_data, alpha_data = data[2]
144    
145            if versions['wxPython-tuple'] < (2,5,3):
146                alpha_data = None
147    
148          if format == 'RAW':          if format == 'RAW':
149              image = wxEmptyImage(data[0], data[1])              image = wxEmptyImage(width, height)
150              image.SetData(data[2][0])              image.SetData(image_data)
151              if data[2][1] is not None:              if mask_data is not None:
152                  mask = wxBitmapFromBits(data[2][1], data[0], data[1], 1)                  mask = wxBitmapFromBits(mask_data, width, height, 1)
153                  mask = wxMask(mask)                  mask = wxMask(mask)
154                elif alpha_data is not None:
155                    image.SetAlphaData(alpha_data)
156          else:          else:
157              stream = cStringIO.StringIO(data[2][0])              stream = cStringIO.StringIO(image_data)
158              image = wxImageFromStream(stream, raster_format_map[format])              image = wxImageFromStream(stream, raster_format_map[format])
159              if data[2][1] is not None:              if mask_data is not None:
160                  stream = cStringIO.StringIO(data[2][1])                  stream = cStringIO.StringIO(mask_data)
161                  mask = wxImageFromStream(stream, raster_format_map[format])                  mask = wxImageFromStream(stream, raster_format_map[format])
162                  mask = wxMask(wxBitmapFromImage(mask, 1))                  mask = wxMask(wxBitmapFromImage(mask, 1))
163                elif alpha_data is not None:
164                    stream = cStringIO.StringIO(alpha_data)
165                    alpha = wxImageFromStream(stream, raster_format_map[format])
166                    image.SetAlpha(alpha.GetData()[:])
167    
168          bitmap = wxBitmapFromImage(image)          bitmap = wxBitmapFromImage(image)
169          bitmap.SetMask(mask)          bitmap.SetMask(mask)
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