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author | Tavian Barnes <tavianator@tavianator.com> | 2014-08-19 17:10:03 -0400 |
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committer | Tavian Barnes <tavianator@tavianator.com> | 2015-10-25 11:03:56 -0400 |
commit | 7b09710392d35fb55b52031d447a542d99fc6b4b (patch) | |
tree | 270eb927ee8c52ceeb99926ebf4843704775a610 /libdimension/model/pigments/canvas_pigment.c | |
parent | 200c86b91ea7063d35be3bffc11c5da53c054653 (diff) | |
download | dimension-7b09710392d35fb55b52031d447a542d99fc6b4b.tar.xz |
Modularize the libdimension codebase.
Diffstat (limited to 'libdimension/model/pigments/canvas_pigment.c')
-rw-r--r-- | libdimension/model/pigments/canvas_pigment.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/libdimension/model/pigments/canvas_pigment.c b/libdimension/model/pigments/canvas_pigment.c new file mode 100644 index 0000000..bb83b0a --- /dev/null +++ b/libdimension/model/pigments/canvas_pigment.c @@ -0,0 +1,57 @@ +/************************************************************************* + * Copyright (C) 2010-2014 Tavian Barnes <tavianator@tavianator.com> * + * * + * This file is part of The Dimension Library. * + * * + * The Dimension Library is free software; you can redistribute it and/ * + * or modify it under the terms of the GNU Lesser General Public License * + * as published by the Free Software Foundation; either version 3 of the * + * License, or (at your option) any later version. * + * * + * The Dimension Library is distributed in the hope that it will be * + * useful, but WITHOUT ANY WARRANTY; without even the implied warranty * + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * + * Lesser General Public License for more details. * + * * + * You should have received a copy of the GNU Lesser General Public * + * License along with this program. If not, see * + * <http://www.gnu.org/licenses/>. * + *************************************************************************/ + +/** + * @file + * Image maps. + */ + +#include "dimension/model.h" + +/// Canvas pigment type. +typedef struct dmnsn_canvas_pigment { + dmnsn_pigment pigment; + dmnsn_canvas *canvas; +} dmnsn_canvas_pigment; + +/// Canvas pigment color callback. +static dmnsn_tcolor +dmnsn_canvas_pigment_fn(const dmnsn_pigment *pigment, dmnsn_vector v) +{ + const dmnsn_canvas_pigment *canvas_pigment = (const dmnsn_canvas_pigment *)pigment; + dmnsn_canvas *canvas = canvas_pigment->canvas; + + size_t x = llround((fmod(v.x, 1.0) + 1.0)*(canvas->width - 1)); + size_t y = llround((fmod(v.y, 1.0) + 1.0)*(canvas->height - 1)); + return dmnsn_canvas_get_pixel(canvas, x%canvas->width, y%canvas->height); +} + +// Create a canvas color +dmnsn_pigment * +dmnsn_new_canvas_pigment(dmnsn_pool *pool, dmnsn_canvas *canvas) +{ + dmnsn_canvas_pigment *canvas_pigment = DMNSN_PALLOC(pool, dmnsn_canvas_pigment); + canvas_pigment->canvas = canvas; + + dmnsn_pigment *pigment = &canvas_pigment->pigment; + dmnsn_init_pigment(pigment); + pigment->pigment_fn = dmnsn_canvas_pigment_fn; + return pigment; +} |