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70 lines
2.4 KiB
70 lines
2.4 KiB
4 months ago
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#ifndef _DEARGB_H
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#define _DEARGB_H
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/*-------------------------------------------------------------------------
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* drawElements Image Library
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* --------------------------
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*
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* Copyright 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*//*!
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* \file
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* \brief Image library.
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*//*--------------------------------------------------------------------*/
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#include "deDefs.h"
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#include "deInt32.h"
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/* ARGB color in descending A, R, G, B order (alpha is in most significant byte). */
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typedef deUint32 deARGB;
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DE_INLINE deARGB deARGB_set (int r, int g, int b, int a)
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{
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DE_ASSERT(deInBounds32(r, 0, 256));
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DE_ASSERT(deInBounds32(g, 0, 256));
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DE_ASSERT(deInBounds32(b, 0, 256));
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DE_ASSERT(deInBounds32(a, 0, 256));
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return (a<<24) | (r<<16) | (g<<8) | (b<<0);
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}
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DE_INLINE deARGB deARGB_white (void) { return deARGB_set(0xFF, 0xFF, 0xFF, 0xFF); }
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DE_INLINE deARGB deARGB_black (void) { return deARGB_set(0, 0, 0, 0xFF); }
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DE_INLINE int deARGB_getRed (deARGB argb) { return (int)((argb >> 16) & 0xFF); }
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DE_INLINE int deARGB_getGreen (deARGB argb) { return (int)((argb >> 8) & 0xFF); }
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DE_INLINE int deARGB_getBlue (deARGB argb) { return (int)((argb >> 0) & 0xFF); }
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DE_INLINE int deARGB_getAlpha (deARGB argb) { return (int)((argb >> 24) & 0xFF); }
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DE_INLINE deARGB deARGB_multiply (deARGB argb, int f)
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{
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DE_ASSERT(deInRange32(f, 0, 256));
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{
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int r = (deARGB_getRed(argb) * f + 128) >> 8;
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int g = (deARGB_getGreen(argb) * f + 128) >> 8;
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int b = (deARGB_getBlue(argb) * f + 128) >> 8;
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int a = (deARGB_getAlpha(argb) * f + 128) >> 8;
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return deARGB_set(r, g, b, a);
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}
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}
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DE_INLINE deARGB deARGB_add (deARGB a, deARGB b)
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{
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return deARGB_set(deClamp32(deARGB_getRed(a) + deARGB_getRed(b), 0, 255),
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deClamp32(deARGB_getGreen(a) + deARGB_getGreen(b), 0, 255),
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deClamp32(deARGB_getBlue(a) + deARGB_getBlue(b), 0, 255),
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deClamp32(deARGB_getAlpha(a) + deARGB_getAlpha(b), 0, 255));
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}
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#endif /* _DEARGB_H */
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