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2004-09-24 Keith Packard <keithp@keithp.com>
* Makefile.am:
* twin.h:
Switch to just supporting stroke fonts
* twin_font.c: (twin_has_ucs4), (_twin_ucs4_base),
(_twin_ucs4_points), (twin_path_ucs4), (twin_ucs4_width),
(twin_path_string):
Finish needed stroke font API.
* twin_glyphs.c:
Elimiate all but ascii glyphs, use offset table to
eliminate table of pointers (which can't be const)
* twin_vera.c:
Remove twin_vera.c
* twinint.h:
Change glyph structures around for offsets and ascii only
* xtwin.c: (main):
Few more cases to show ascii text support
2004-09-24 Keith Packard <keithp@keithp.com>
* Makefile.am:
* twin_hull.c: (_twin_slope_init), (_twin_hull_create),
(_twin_slope_compare), (_twin_hull_vertex_compare),
(_twin_hull_prev_valid), (_twin_hull_next_valid),
(_twin_hull_eliminate_concave), (_twin_hull_to_path),
(twin_path_convex_hull):
Add convex hull algorithm from cairo sources. Used to
constrain pens to convex shapes so that the convolution
algorithm works correctly.
* twin.h:
Reduce default tolerance to 1/16 of a pixel
* twin_convolve.c: (_angle), (_twin_subpath_convolve),
(twin_path_convolve):
Use convex hull of pen.
* twin_font.c: (compare_snap), (_snap), (_add_snap),
(twin_path_glyph), (twin_glyph_width), (twin_path_string):
Snap horizontal and vertical elements of glyphs to
pixel boundaries. Snap stem widths to integer amounts.
Add slanting and emboldening
* twin_glyphs.c:
Add space and box
* twin_primitive.c:
Avoid using __inline as it increases size dramatically
* twin_spline.c: (_twin_spline_decompose):
Use <= tolerance_squared as that may be zero
* xtwin.c: (main):
Swizzle code to show off recent changes
2004-09-23 Keith Packard <keithp@keithp.com>
* Makefile.am:
* configure.ac:
* twin.h:
Fix twin_fixed_floor to work for negative values correctly
Add twin_path_cur_point
* twin_convolve.c: (_twin_path_step), (_around_order), (_angle),
(_twin_subpath_convolve), (twin_path_convolve):
fix twin_path_step to actually handle duplicate points.
Change 'clockwise' to 'around_order' so that all three possible
results are returned (clockwise, parallel and counterclockwise)
Handle disjoint strokes
* twin_font.c: (twin_has_glyph), (twin_path_glyph),
(twin_glyph_width), (twin_path_string), (twin_path_fglyph),
(twin_path_ucs4), (_twin_utf8_to_ucs4), (twin_path_utf8):
Add outline and stroke font support (pick one and remove the other)
* twin_glyphs.c:
Huge array of stroke fonts from Hershey. Pick appropriate subset
and remove extra glyphs (there are a lot here)
* twin_path.c: (_twin_cur_subpath_len), (twin_path_cur_point),
(twin_path_move), (twin_path_draw), (twin_path_close):
Eliminate repeated move and close, eliminate duplicate draw.
* twin_poly.c: (_twin_edge_build), (_span_fill), (_twin_edge_fill):
Add support for 1, 4, 16 and 64 samples. 16 appears to be the
magic sweet spot.
* twin_ttf/Makefile.am:
* twin_ttf/Vera.ttf:
* twin_ttf/twin_ttf.c: (pos), (command), (cpos), (ucs4_to_utf8),
(glyph), (outline_moveto), (outline_lineto), (outline_conicto),
(outline_cubicto), (ucs_page), (ucs_first_in_page), (sanitize),
(facename), (convert_font), (main):
Convert "real" outline fonts to twin built-ins
* twin_vera.c:
Converted version of Bitstream Vera Sans Roman
* twinint.h:
* xtwin.c: (main):
2004-09-21 Keith Packard <keithp@keithp.com>
* twin.h:
* twinint.h:
Add a few definitions
* twin_convolve.c: (_twin_path_leftpoint), (twin_path_convolve):
Find pen starting point as closest to the normal to the path.
Restructure convolve loop to be easier to understand
* twin_path.c: (twin_path_circle):
Round circle coordinates instead of truncating them
* twin_poly.c: (_twin_fixed_grid_ceil), (_twin_edge_build),
(_span_fill), (_twin_edge_fill):
Move sample grid by 1/2 sample step.
Clip polygons to mask pixmap.
Modest performance improvement in span filling.
Fix end case to remove edges before stepping.
* xtwin.c: (main):
Stroke a path.
2004-09-21 Keith Packard <keithp@keithp.com>
* Makefile.am:
* twin.h:
* twin_convolve.c: (_twin_path_leftmost), (_twin_path_step),
(_clockwise), (twin_path_convolve):
Add convolution. Pen starting position needs work.
* twin_geom.c: (_twin_distance_to_point_squared),
(_twin_distance_to_line_squared):
* twin_spline.c: (_twin_spline_error_squared), (twin_path_curve):
* twinint.h:
Move shared geometric functions to new file
* twin_path.c: (_sin), (_cos), (twin_path_circle),
(twin_path_fill):
Add twin_path_circle to generate pens.
Fix path edge generator to handle last subpath right.
* twin_poly.c: (_twin_edge_build):
Skip vertices which don't span a sample row
* xtwin.c: (main):
test convolutions
2004-09-20 Keith Packard <keithp@keithp.com>
* .cvsignore:
Add .cvsignore file
* architecture:
Mention path primitives
* Makefile.am:
* twin.h:
* twinint.h:
Add paths
* twin_draw.c: (twin_composite):
Eliminate some unused variables.
* twin_path.c: (twin_path_move), (twin_path_draw),
(twin_path_close), (twin_path_fill), (twin_path_empty),
(twin_path_create), (twin_path_destroy):
Simple path construction
* twin_poly.c: (_edge_compare_y), (_edge_step_by), (_dump_edge),
(_twin_edge_build), (_span_fill), (_twin_edge_fill),
(twin_polygon):
Anti-aliased polygon fill code
* twin_screen.c:
Change twin_bool to twin_bool_t
* twin_spline.c: (_lerp_half), (_de_casteljau),
(_distance_squared_to_point), (_distance_squared_to_segment),
(_twin_spline_error_squared), (_twin_spline_decompose),
(twin_path_curve):
Append cubic Bézier splines to paths
* xtwin.c: (main):
Test paths
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