I am trying to rasterize a rectangle which is centered around y==0.
I get a bitmap half as high as I expect.
More complicated tests suggest that everything below y==0 is clipped.
Test file included.
(Note: I do not have a Face open. I'm going directly from an FT_Outline
to an FT_Bitmap).
#include <string.h>
#include <stdlib.h>
#include <math.h>
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_OUTLINE_H
static FT_Library context;
int main(int argc, char **argv) {
FT_Outline outline;
FT_Bitmap bitmap;
char tags[4];
short contours[1];
FT_Vector points[4];
int k,j,rowcnt,err;
if ( FT_Init_FreeType( &context )) {
fprintf( stderr, "Init failed.\n" );
return( 2 );
}
memset(&outline,0,sizeof(outline));
outline.n_contours = 1;
outline.tags = tags;
outline.contours = contours;
outline.n_points = 4;
outline.points = points;
outline.flags = FT_OUTLINE_NONE;
points[0].x = 73 ; points[0].y = 899;
points[1].x = 427; points[1].y = 899;
points[2].x = 427; points[2].y = -899;
points[3].x = 73 ; points[3].y = -899;
contours[0] = 3;
tags[0] = tags[1] = tags[2] = tags[4] = 0x1; /* On-curve */
memset(&bitmap,0,sizeof(bitmap));
bitmap.rows = (((int) (ceil(899.0/(1<<6))-floor(-899.0/(1<<6))))) +1;
bitmap.width = (((int) (ceil(427./(1<<6))-floor( 73.0/(1<<6))))) +1;
bitmap.pitch = (bitmap.width+7)>>3;
bitmap.num_grays = 0;
bitmap.pixel_mode = ft_pixel_mode_mono;
bitmap.buffer = calloc(bitmap.pitch*bitmap.rows,sizeof(char));
err = (FT_Outline_Get_Bitmap)(context,&outline,&bitmap);
if ( err ) {
fprintf( stderr, "Rasterize failed. %d\n", err );
return( 2 );
}
rowcnt = 0;
for ( k=0; k<bitmap.rows; ++k ) {
for ( j=bitmap.pitch-1; j>=0 && bitmap.buffer[k*bitmap.pitch+j]==0; --j );
if ( j!=-1 )
++rowcnt;
}
fprintf( stderr, "I expect to have a bitmap with about %d rows. Instead I get one with %d rows\n",
bitmap.rows-1, rowcnt );
fprintf( stderr, " It looks as though the bitmap is clipped at y==0\n" );
return( 1 );
}
_______________________________________________
Freetype-devel mailing list
[email protected]
http://lists.nongnu.org/mailman/listinfo/freetype-devel
