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fix scaling gray images

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This commit is contained in:
Jiri Drbalek 2015-10-09 15:15:50 +00:00
parent da1247fa1e
commit 2596f7bd52
1 changed files with 31 additions and 17 deletions
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48
include/mapnik/renderer_common/process_raster_symbolizer.hpp
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@ -89,21 +89,29 @@ struct image_dispatcher
template <typename T>
void operator() (T const& data_in) const
{
using image_type = T;
image_rgba8 dst(width_, height_);
image_rgba8 colorized(data_in.width(), data_in.height());
raster_colorizer_ptr colorizer = get<raster_colorizer_ptr>(sym_, keys::colorizer);
if (need_scaling_)
if (colorizer)
{
image_type data_out(width_, height_);
scale_image_agg(data_out, data_in, method_, scale_x_, scale_y_, 0.0, 0.0, filter_factor_);
if (colorizer) colorizer->colorize(dst, data_out, nodata_, feature_);
colorizer->colorize(colorized, data_in, nodata_, feature_);
}
else
{
if (colorizer) colorizer->colorize(dst, data_in, nodata_, feature_);
// TODO: Apply some decent auto colorization...
return;
}
if (need_scaling_)
{
image_rgba8 scaled(width_, height_);
scale_image_agg(scaled, colorized, method_, scale_x_, scale_y_, 0.0, 0.0, filter_factor_);
premultiply_alpha(scaled);
composite_(scaled, comp_op_, opacity_, start_x_, start_y_);
}
else
{
premultiply_alpha(colorized);
composite_(colorized, comp_op_, opacity_, start_x_, start_y_);
}
premultiply_alpha(dst);
composite_(dst, comp_op_, opacity_, start_x_, start_y_);
}
private:
int start_x_;
@ -164,15 +172,21 @@ struct image_warp_dispatcher
template <typename T>
void operator() (T const& data_in) const
{
using image_type = T;
image_type data_out(width_, height_);
if (nodata_) data_out.set(*nodata_);
warp_image(data_out, data_in, prj_trans_, target_ext_, source_ext_, offset_x_, offset_y_, mesh_size_, scaling_method_, filter_factor_);
image_rgba8 dst(width_, height_);
image_rgba8 colorized(data_in.width(), data_in.height());
raster_colorizer_ptr colorizer = get<raster_colorizer_ptr>(sym_, keys::colorizer);
if (colorizer) colorizer->colorize(dst, data_out, nodata_, feature_);
premultiply_alpha(dst);
composite_(dst, comp_op_, opacity_, start_x_, start_y_);
if (colorizer)
{
colorizer->colorize(colorized, data_in, nodata_, feature_);
}
else
{
// TODO: Apply some decent auto colorization...
return;
}
image_rgba8 warped(width_, height_);
warp_image(warped, colorized, prj_trans_, target_ext_, source_ext_, offset_x_, offset_y_, mesh_size_, scaling_method_, filter_factor_);
premultiply_alpha(warped);
composite_(warped, comp_op_, opacity_, start_x_, start_y_);
}
private:
proj_transform const& prj_trans_;