58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
/*
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* Copyright (c) 2014, 2015 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* pixel.h
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* Pixel utilities.
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*/
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#ifndef PIXEL_H
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#define PIXEL_H
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#include <stdint.h>
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// TODO: This isn't the only pixel format in the world!
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union color_rgba8
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{
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struct
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{
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uint8_t b;
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uint8_t g;
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uint8_t r;
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uint8_t a;
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};
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uint32_t value;
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};
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__attribute__((used))
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static inline uint32_t make_color_a(uint8_t r, uint8_t g, uint8_t b, uint8_t a)
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{
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union color_rgba8 color;
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color.r = r;
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color.g = g;
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color.b = b;
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color.a = a;
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return color.value;
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}
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__attribute__((used))
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static inline uint32_t make_color(uint8_t r, uint8_t g, uint8_t b)
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{
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return make_color_a(r, g, b, 255);
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}
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uint32_t blend_pixel(uint32_t bg_value, uint32_t fg_value);
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#endif
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