Mercurial > MadButterfly
view src/graph_engine_cairo.c @ 653:34710e86b4a2
Remove cairo-directfb.h but it will be needed at graphic layer initialization of SMP8654.
author | Shih-Yuan Lee (FourDollars) <fourdollars@gmail.com> |
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date | Sat, 31 Jul 2010 16:36:53 +0800 |
parents | e813ac222f48 |
children | b42d69ab8857 586e50f82c1f |
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#include <fontconfig/fontconfig.h> #include <cairo-ft.h> #include "mb_graph_engine_cairo.h" #include "mb_shapes.h" #ifndef ASSERT #define ASSERT(x) #endif /*! \brief Find out a font pattern. * * This function use fontconfig to decide a font file in pattern. It can * replaced by other mechanism if you think it is not what you want. * * \param slant make font prune if it it non-zero. * \param weight make font normal if it is 100. */ static FcPattern *query_font_pattern(const char *family, int slant, int weight) { FcPattern *ptn, *p, *fn_ptn; FcValue val; FcConfig *cfg; FcBool r; FcResult result; static int slant_map[] = { /* from MB_FONT_SLANT_* to FC_SLANT_* */ FC_SLANT_ROMAN, FC_SLANT_ROMAN, FC_SLANT_ITALIC, FC_SLANT_OBLIQUE}; cfg = FcConfigGetCurrent(); ptn = FcPatternCreate(); p = FcPatternCreate(); if(ptn == NULL || p == NULL) goto err; val.type = FcTypeString; val.u.s = family; FcPatternAdd(ptn, "family", val, FcTrue); val.type = FcTypeInteger; val.u.i = slant_map[slant]; FcPatternAdd(ptn, "slant", val, FcTrue); val.type = FcTypeInteger; val.u.i = weight; FcPatternAdd(ptn, "weight", val, FcTrue); r = FcConfigSubstituteWithPat(cfg, ptn, NULL, FcMatchPattern); if(!r) goto err; r = FcConfigSubstituteWithPat(cfg, p, ptn, FcMatchFont); if(!r) goto err; FcDefaultSubstitute(p); fn_ptn = FcFontMatch(cfg, p, &result); /* It is supposed to return FcResultMatch. But, it is no, now. * I don't know why. Someone should figure out the issue. */ #if 0 if(result != FcResultMatch) { printf("%d %d\n", result, FcResultMatch); goto err; } #endif if(fn_ptn == NULL) goto err; FcPatternDestroy(ptn); FcPatternDestroy(p); return fn_ptn; err: if(ptn) FcPatternDestroy(ptn); if(p) FcPatternDestroy(p); return NULL; } /*! \brief Find out a font face for a pattern specified. * * The pattern, here, is a vector of family, slant, and weight. * This function base on fontconfig and cairo FreeType font supporting. * You can replace this function with other font mechanisms. */ mbe_font_face_t * mbe_query_font_face(const char *family, int slant, int weight) { mbe_font_face_t *cface; FcPattern *ptn; ptn = query_font_pattern(family, slant, weight); cface = cairo_ft_font_face_create_for_pattern(ptn); FcPatternDestroy(ptn); return cface; } void mbe_free_font_face(mbe_font_face_t *face) { ASSERT(face == NULL); mbe_font_face_destroy(face); } mbe_pattern_t * mbe_pattern_create_radial(co_aix cx0, co_aix cy0, co_aix radius0, co_aix cx1, co_aix cy1, co_aix radius1, grad_stop_t *stops, int stop_cnt) { cairo_pattern_t *ptn; grad_stop_t *stop; int i; ptn = cairo_pattern_create_radial(cx0, cy0, radius0, cx1, cy1, radius1); if(ptn == NULL) return NULL; stop = stops; for(i = 0; i < stop_cnt; i++) { cairo_pattern_add_color_stop_rgba(ptn, stop->offset, stop->r, stop->g, stop->b, stop->a); stop++; } return ptn; } mbe_pattern_t * mbe_pattern_create_linear(co_aix x0, co_aix y0, co_aix x1, co_aix y1, grad_stop_t *stops, int stop_cnt) { cairo_pattern_t *ptn; grad_stop_t *stop; int i; ptn = cairo_pattern_create_linear(x0, y0, x1, y1); if(ptn == NULL) return NULL; stop = stops; for(i = 0; i < stop_cnt; i++) { cairo_pattern_add_color_stop_rgba(ptn, stop->offset, stop->r, stop->g, stop->b, stop->a); stop++; } return ptn; }