91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
/*
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* This software is licensed under the terms of the MIT License.
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* See COPYING for further information.
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* ---
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* Copyright (c) 2011-2019, Lukas Weber <laochailan@web.de>.
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* Copyright (c) 2012-2019, Andrei Alexeyev <akari@taisei-project.org>.
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*/
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#ifndef IGUARD_color_h
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#define IGUARD_color_h
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#include "taisei.h"
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#include "util.h"
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typedef struct Color {
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float r, g, b, a;
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} Color;
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/*
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* These macros return a pointer to a new Color instance, which is *block-scoped*,
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* and has automatic storage-class.
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*/
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#define RGBA(r, g, b, a) (&(Color) { (r), (g), (b), (a) })
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#define RGBA_MUL_ALPHA(r, g, b, a) color_mul_alpha(RGBA((r), (g), (b), (a)))
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#define RGB(r, g, b) RGBA((r), (g), (b), 1)
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#define HSLA(h, s, l, a) color_hsla((&(Color) { 0 }), (h), (s), (l), (a))
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#define HSLA_MUL_ALPHA(h, s, l, a) color_mul_alpha(HSLA((h), (s), (l), (a)))
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#define HSL(h, s, l) HSLA((h), (s), (l), 1)
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#define COLOR_COPY(c) color_copy((&(Color) { 0 }), (c))
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/*
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* All of these modify the first argument in-place, and return it for convenience.
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*/
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Color* color_copy(Color *dst, const Color *src)
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attr_nonnull(1) attr_returns_nonnull;
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Color* color_hsla(Color *clr, float h, float s, float l, float a)
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attr_nonnull(1) attr_returns_nonnull;
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void color_get_hsl(const Color *c, float *out_h, float *out_s, float *out_l)
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attr_nonnull(1);
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Color* color_add(Color *clr, const Color *clr2)
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attr_nonnull(1) attr_returns_nonnull;
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Color* color_sub(Color *clr, const Color *clr2)
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attr_nonnull(1) attr_returns_nonnull;
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Color* color_mul(Color *clr, const Color *clr2)
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attr_nonnull(1) attr_returns_nonnull;
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Color* color_mul_alpha(Color *clr)
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attr_nonnull(1) attr_returns_nonnull;
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Color* color_mul_scalar(Color *clr, float scalar)
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attr_nonnull(1) attr_returns_nonnull;
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Color* color_div(Color *clr, const Color *clr2)
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attr_nonnull(1) attr_returns_nonnull;
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Color* color_div_alpha(Color *clr)
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attr_nonnull(1) attr_returns_nonnull;
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Color* color_div_scalar(Color *clr, float scalar)
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attr_nonnull(1) attr_returns_nonnull;
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Color* color_lerp(Color *clr, const Color *clr2, float a)
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attr_nonnull(1) attr_returns_nonnull;
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Color* color_approach(Color *clr, const Color *clr2, float delta)
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attr_nonnull(1) attr_returns_nonnull;
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Color* color_set_opacity(Color *clr, float opacity)
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attr_nonnull(1) attr_returns_nonnull;
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/*
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* End of color manipulation routines.
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*/
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bool color_equals(const Color *clr, const Color *clr2)
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attr_nonnull(1, 2);
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char* color_str(const Color *clr)
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attr_nonnull(1) attr_returns_allocated;
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#endif // IGUARD_color_h
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