Mercurial > MadButterfly
diff include/mb_graph_engine.h @ 458:bb4f651090bf
Use cairo to transform and draw arc.
- We move some values into float_args.
- fix_args is removed.
- args is rename to pnts.
- We still need to add corner points to pnts at sh_path_arc_cmd_arg_fill().
| author | Thinker K.F. Li <thinker@branda.to> |
|---|---|
| date | Thu, 10 Sep 2009 17:36:45 +0800 |
| parents | 5c9e2a8a4bd8 |
| children | aa2b388fba4e |
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--- a/include/mb_graph_engine.h Thu Aug 06 15:38:08 2009 +0800 +++ b/include/mb_graph_engine.h Thu Sep 10 17:36:45 2009 +0800 @@ -47,7 +47,6 @@ #define mbe_fill_preserve cairo_fill_preserve #define mbe_set_operator cairo_set_operator #define mbe_get_operator cairo_get_operator -#define mbe_arc_negative cairo_arc_negative #define mbe_set_source cairo_set_source #define mbe_reset_clip cairo_reset_clip #define mbe_get_target cairo_get_target @@ -72,7 +71,6 @@ #define mbe_save cairo_save #define mbe_fill cairo_fill #define mbe_clip cairo_clip -#define mbe_arc cairo_arc typedef cairo_text_extents_t mbe_text_extents_t; typedef cairo_font_options_t mbe_font_options_t; @@ -84,6 +82,7 @@ typedef cairo_status_t mbe_status_t; typedef cairo_matrix_t mbe_matrix_t; typedef cairo_t mbe_t; +typedef float co_aix; static mbe_surface_t * mbe_image_surface_create_for_data(unsigned char *data, @@ -163,6 +162,29 @@ return cairo_image_surface_create(_fmt, width, height); } +static void +mbe_transform(mbe_t *mbe, const co_aix matrix[6]) { + cairo_matrix_t cmtx; + + cmtx.xx = matrix[0]; + cmtx.xy = matrix[1]; + cmtx.x0 = matrix[2]; + cmtx.yx = matrix[3]; + cmtx.yy = matrix[4]; + cmtx.y0 = matrix[5]; + + cairo_transform(mbe, &cmtx); +} + +static void +mbe_arc(mbe_t *mbe, co_aix x, co_aix y, co_aix radius, + co_aix angle_start, co_aix angle_stop) { + if(angle_start <= angle_stop) + cairo_arc(mbe, x, y, radius, angle_start, angle_stop); + else + cairo_arc_negative(mbe, x, y, radius, angle_start, angle_stop); +} + /* @} */ #endif /* __MBE_H_ */