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| author | Tom Black <[email protected]> | 2019-04-15 23:46:58 -0500 |
|---|---|---|
| committer | Tom Black <[email protected]> | 2019-04-15 23:46:58 -0500 |
| commit | ea7e78893a36f34e588dcae16c99dc8a1a67a2ee (patch) | |
| tree | 9094cd8194d01e0128525b1edcb58618cb7829cf /ext | |
| parent | b844eee8245e4618db947ea12ed4cb89f0a4b8fb (diff) | |
| download | ruby2d-ea7e78893a36f34e588dcae16c99dc8a1a67a2ee.tar.gz ruby2d-ea7e78893a36f34e588dcae16c99dc8a1a67a2ee.zip | |
Set image anchor point
Diffstat (limited to 'ext')
| -rw-r--r-- | ext/ruby2d/ruby2d.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/ext/ruby2d/ruby2d.c b/ext/ruby2d/ruby2d.c index bad3ae1..c5d0a21 100644 --- a/ext/ruby2d/ruby2d.c +++ b/ext/ruby2d/ruby2d.c @@ -49,6 +49,7 @@ // Define common types and API calls, mapping to both Ruby and MRuby APIs #if MRUBY // MRuby + #define R_ID mrb_sym #define R_VAL mrb_value #define R_NIL (mrb_nil_value()) #define R_TRUE (mrb_true_value()) @@ -70,8 +71,11 @@ #define r_args_req(n) MRB_ARGS_REQ(n) // Helpers #define r_char_to_sym(str) mrb_symbol_value(mrb_intern_cstr(mrb, str)) + #define r_char_to_id(str) mrb_intern_cstr(mrb, str) // C string to Ruby ID + #define r_sym_to_id(sym) mrb_symbol(sym) // Ruby symbol to ID #else // Ruby + #define R_ID ID #define R_VAL VALUE #define R_NIL Qnil #define R_TRUE Qtrue @@ -93,6 +97,8 @@ #define r_args_req(n) n // Helpers #define r_char_to_sym(str) ID2SYM(rb_intern(str)) + #define r_char_to_id(str) rb_intern(str) // C string to Ruby ID + #define r_sym_to_id(sym) SYM2ID(sym) // Ruby symbol to ID #endif // Create the MRuby context @@ -362,6 +368,18 @@ static R_VAL ruby2d_image_ext_render(R_VAL self) { img->x = NUM2DBL(r_iv_get(self, "@x")); img->y = NUM2DBL(r_iv_get(self, "@y")); + R_ID anchor = r_sym_to_id(r_iv_get(self, "@anchor")); + R_ID center = r_char_to_id("center"); + R_ID top_left = r_char_to_id("top_left"); + printf("anchor: %u\n", anchor); + printf("center: %u\n", center); + printf("top_left: %u\n", top_left); + + if (anchor == center) { + img->x = img->x - (img->width / 2.0); + img->y = img->y - (img->height / 2.0); + } + R_VAL w = r_iv_get(self, "@width"); R_VAL h = r_iv_get(self, "@height"); if (r_test(w)) img->width = NUM2INT(w); @@ -377,6 +395,9 @@ static R_VAL ruby2d_image_ext_render(R_VAL self) { S2D_DrawImage(img); + img->x = img->x + (img->width / 2.0); + img->y = img->y + (img->height / 2.0); + return R_NIL; } |