/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/renderer.py
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revision 2394 by jan, Wed Nov 17 22:02:29 2004 UTC revision 2601 by joey, Sat Apr 23 16:40:33 2005 UTC
# Line 16  __version__ = "$Revision$" Line 16  __version__ = "$Revision$"
16    
17  import cStringIO  import cStringIO
18    
19    import array
20    
21    import traceback
22    
23  from Thuban import _  from Thuban import _
24    
25  from wxPython.wx import wxPoint, wxRect, wxPen, wxBrush, wxFont, \  from wxPython.wx import wxPoint, wxRect, wxPen, wxBrush, wxFont, \
26      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \      wxTRANSPARENT_PEN, wxTRANSPARENT_BRUSH, \
27      wxBLACK_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \      wxBLACK_PEN, wxBLACK, wxSOLID, wxCROSS_HATCH, wxSWISS, wxNORMAL, \
28      wxBitmapFromImage, wxImageFromStream, wxBITMAP_TYPE_BMP, wxBITMAP_TYPE_JPEG      wxBitmapFromImage, wxImageFromStream, wxBITMAP_TYPE_BMP, \
29        wxBITMAP_TYPE_JPEG, wxBITMAP_TYPE_PNG, wxBITMAP_TYPE_TIF, \
30        wxBITMAP_TYPE_GIF, wxEmptyImage, wxMask, wxBitmapFromBits
31    
32  from wxproj import draw_polygon_shape, draw_polygon_init  from wxproj import draw_polygon_shape, draw_polygon_init
33    
# Line 37  import Thuban.Model.resource Line 43  import Thuban.Model.resource
43    
44  from baserenderer import BaseRenderer  from baserenderer import BaseRenderer
45    
46    from math import floor
47    
48    from types import StringType
49    
50    from Thuban.version import versions
51    
52    if Thuban.Model.resource.has_gdal_support():
53        from gdalwarp import ProjectRasterFile
54    
55    
56  # 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
57  # method to the appropriate wxWindows constants  # method to the appropriate wxWindows constants
58  raster_format_map = {  raster_format_map = {
59      "BMP": wxBITMAP_TYPE_BMP,      "BMP": wxBITMAP_TYPE_BMP,
60      "JPEG": wxBITMAP_TYPE_JPEG,      "JPEG": wxBITMAP_TYPE_JPEG,
61        "PNG": wxBITMAP_TYPE_PNG,
62        "TIFF": wxBITMAP_TYPE_TIF,
63        "GIF": wxBITMAP_TYPE_GIF,
64      }      }
65    
66  class MapRenderer(BaseRenderer):  class MapRenderer(BaseRenderer):
# Line 83  class MapRenderer(BaseRenderer): Line 101  class MapRenderer(BaseRenderer):
101          if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE          if (layer.ShapeStore().RawShapeFormat() == RAW_SHAPEFILE
102              and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)):              and layer.ShapeType() in (SHAPETYPE_ARC, SHAPETYPE_POLYGON)):
103              offx, offy = self.offset              offx, offy = self.offset
104                x = lambda a, b, c, d: None
105                #return (True, x, None)
106              return (True, draw_polygon_shape,              return (True, draw_polygon_shape,
107                      draw_polygon_init(layer.ShapeStore().Shapefile(),                      draw_polygon_init(layer.ShapeStore().Shapefile(),
108                                        self.dc, self.map.projection,                                        self.dc, self.map.projection,
# Line 95  class MapRenderer(BaseRenderer): Line 115  class MapRenderer(BaseRenderer):
115          return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL,          return wxFont(int(round(self.resolution * 10)), wxSWISS, wxNORMAL,
116                        wxNORMAL)                        wxNORMAL)
117    
118      def draw_raster_data(self, data, format = 'BMP'):      def projected_raster_layer(self, layer, srcProj, dstProj, extents,
119          stream = cStringIO.StringIO(data)                                 resolution, dimensions, options):
120          image = wxImageFromStream(stream, raster_format_map[format])  
121            ret = None
122    
123            if Thuban.Model.resource.has_gdal_support():
124    
125                if versions['wxPython-tuple'] < (2,5,3):
126                    options = options | 4  # INVERT_MASK_BITS
127                    options = options & ~2 # ALPHA_MASK not supported
128    
129                try:
130                    ret = ProjectRasterFile(layer.GetImageFilename(),
131                                            srcProj, dstProj,
132                                            extents, resolution, dimensions,
133                                            options)
134                except (MemoryError, IOError, AttributeError, ValueError):
135                    # Why does this catch AttributeError and ValueError?
136                    # FIXME: The exception should be communicated to the user
137                    # better.
138                    traceback.print_exc()
139    
140            return ret
141    
142        def draw_raster_data(self, layer, x,y, data, format = 'BMP'):
143    
144            mask = None
145            alpha = None
146            width = data[0]
147            height = data[1]
148            image_data, mask_data, alpha_data = data[2]
149    
150            if versions['wxPython-tuple'] < (2,5,3):
151                alpha_data = None
152    
153            if format == 'RAW':
154                image = wxEmptyImage(width, height)
155                image.SetData(image_data)
156                if mask_data is not None:
157                    mask = wxBitmapFromBits(mask_data, width, height, 1)
158                    mask = wxMask(mask)
159                elif alpha_data is not None:
160                    # alpha_data is already in the right format
161                    alpha = alpha_data
162    
163            else:
164                stream = cStringIO.StringIO(image_data)
165                image = wxImageFromStream(stream, raster_format_map[format])
166                if mask_data is not None:
167                    stream = cStringIO.StringIO(mask_data)
168                    mask = wxImageFromStream(stream, raster_format_map[format])
169                    mask = wxMask(wxBitmapFromImage(mask, 1))
170                elif alpha_data is not None:
171                    stream = cStringIO.StringIO(alpha_data)
172                    alpha = wxImageFromStream(stream, raster_format_map[format])
173                    alpha = alpha.GetData()[:] # XXX: do we need to copy this?
174    
175            #
176            # if we are using the alpha_data then scale down the alpha values
177            # by the layer's opacity using a string translation table
178            #
179            if alpha is not None:
180                lo = layer.Opacity()
181                if lo == 0:
182                    return
183                elif lo == 1:
184                    a = alpha
185                else:
186                    tr = [int(i*lo) for i in range(256)]
187                    table = array.array('B', tr).tostring()
188                    a = alpha.translate(table)
189    
190                image.SetAlphaData(a)
191    
192          bitmap = wxBitmapFromImage(image)          bitmap = wxBitmapFromImage(image)
193          self.dc.DrawBitmap(bitmap, 0, 0)  
194            if mask is not None:
195                bitmap.SetMask(mask)
196    
197            self.dc.DrawBitmap(bitmap, int(round(x)), int(round(y)), True)
198    
199    
200  class ScreenRenderer(MapRenderer):  class ScreenRenderer(MapRenderer):
# Line 162  class ScreenRenderer(MapRenderer): Line 257  class ScreenRenderer(MapRenderer):
257    
258              # Get the size of the specific property for this              # Get the size of the specific property for this
259              # point              # point
260              if shapetype == SHAPETYPE_POINT:              if shapetype == SHAPETYPE_POINT and field is not None:
261                  value = table.ReadValue(shape.ShapeID(), field)                  value = table.ReadValue(shape.ShapeID(), field)
262                  group = lc.FindGroup(value)                  group = lc.FindGroup(value)
263                  size = group.GetProperties().GetSize()                  size = group.GetProperties().GetSize()
# Line 264  class ExportRenderer(ScreenRenderer): Line 359  class ExportRenderer(ScreenRenderer):
359          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5          self.shifty = (mmaxy - mminy)*0.5 - (ury - lly)*0.5
360    
361          self.offset = (offx+self.shiftx, offy+self.shifty)          self.offset = (offx+self.shiftx, offy+self.shifty)
362            self.region = (llx + self.shiftx, lly + self.shifty, urx, ury)
363    
364          # Draw the map          # Draw the map
365          self.dc.BeginDrawing()          self.dc.BeginDrawing()
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