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[sdf -> bsdf] Extended to work with monochrome bitmaps. 

* src/sdf/ftbsdf.c (bsdf_init_distance_map): Handle
  monochrome bitmaps and convert them to the internal
  intermediate format, which can then be used to
  generate SDF.
This commit is contained in:
Anuj Verma 2020-08-05 09:12:29 +05:30
parent ee9b8e8cc0
commit a9fbef27ab
2 changed files with 54 additions and 8 deletions
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9
[GSoC]ChangeLog
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@ -1,3 +1,12 @@
2020-08-5 Anuj Verma <anujv@iitbhilai.ac.in>
[sdf -> bsdf] Extended to work with monochrome bitmaps.
* src/sdf/ftbsdf.c (bsdf_init_distance_map): Handle
monochrome bitmaps and convert them to the internal
intermediate format, which can then be used to
generate SDF.
2020-08-3 Anuj Verma <anujv@iitbhilai.ac.in>
* src/sdf/ftsdfrend.c (ft_bsdf_render): Initialize

53
src/sdf/ftbsdf.c
View File

@ -446,17 +446,54 @@
/* since the target bitmap can be 16bpp we manually */
/* convert the source bitmap to desired bpp. */
switch ( source->pixel_mode ) {
case FT_PIXEL_MODE_GRAY2:
case FT_PIXEL_MODE_GRAY4:
case FT_PIXEL_MODE_GRAY16:
case FT_PIXEL_MODE_LCD:
case FT_PIXEL_MODE_LCD_V:
case FT_PIXEL_MODE_MONO:
/* [TODO] */
FT_ERROR(( "[bsdf] bsdf_copy_source_to_target: "
"support for pixel mode not yet added\n" ));
error = FT_THROW( Unimplemented_Feature );
{
FT_Int t_width = worker->width;
FT_Int t_rows = worker->rows;
FT_Int s_width = source->width;
FT_Int s_rows = source->rows;
for ( t_j = 0; t_j < t_rows; t_j++ )
{
for ( t_i = 0; t_i < t_width; t_i++ )
{
FT_Int t_index = t_j * t_width + t_i;
FT_Int s_index;
FT_Int div, mod;
FT_Byte pixel, byte;
t[t_index] = zero_ed;
s_i = t_i - x_diff;
s_j = t_j - y_diff;
/* Assign 0 to padding similar to */
/* the source bitmap. */
if ( s_i < 0 || s_i >= s_width ||
s_j < 0 || s_j >= s_rows )
continue;
if ( worker->params.flip_y )
s_index = ( s_rows - s_j - 1 ) * source->pitch;
else
s_index = s_j * source->pitch;
div = s_index + s_i / 8;
mod = 7 - s_i % 8;
pixel = s[div];
byte = 1 << mod;
t[t_index].alpha = pixel & byte ? 255 : 0;
pixel = 0;
}
}
break;
}
case FT_PIXEL_MODE_GRAY:
{
FT_Int t_width = worker->width;