1 #ifndef _DEARGB_H 2 #define _DEARGB_H 3 /*------------------------------------------------------------------------- 4 * drawElements Image Library 5 * -------------------------- 6 * 7 * Copyright 2014 The Android Open Source Project 8 * 9 * Licensed under the Apache License, Version 2.0 (the "License"); 10 * you may not use this file except in compliance with the License. 11 * You may obtain a copy of the License at 12 * 13 * http://www.apache.org/licenses/LICENSE-2.0 14 * 15 * Unless required by applicable law or agreed to in writing, software 16 * distributed under the License is distributed on an "AS IS" BASIS, 17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 18 * See the License for the specific language governing permissions and 19 * limitations under the License. 20 * 21 *//*! 22 * \file 23 * \brief Image library. 24 *//*--------------------------------------------------------------------*/ 25 26 #include "deDefs.h" 27 #include "deInt32.h" 28 29 /* ARGB color in descending A, R, G, B order (alpha is in most significant byte). */ 30 typedef deUint32 deARGB; 31 32 DE_INLINE deARGB deARGB_set (int r, int g, int b, int a) 33 { 34 DE_ASSERT(deInBounds32(r, 0, 256)); 35 DE_ASSERT(deInBounds32(g, 0, 256)); 36 DE_ASSERT(deInBounds32(b, 0, 256)); 37 DE_ASSERT(deInBounds32(a, 0, 256)); 38 return (a<<24) | (r<<16) | (g<<8) | (b<<0); 39 } 40 41 DE_INLINE deARGB deARGB_white (void) { return deARGB_set(0xFF, 0xFF, 0xFF, 0xFF); } 42 DE_INLINE deARGB deARGB_black (void) { return deARGB_set(0, 0, 0, 0xFF); } 43 44 DE_INLINE int deARGB_getRed (deARGB argb) { return (int)((argb >> 16) & 0xFF); } 45 DE_INLINE int deARGB_getGreen (deARGB argb) { return (int)((argb >> 8) & 0xFF); } 46 DE_INLINE int deARGB_getBlue (deARGB argb) { return (int)((argb >> 0) & 0xFF); } 47 DE_INLINE int deARGB_getAlpha (deARGB argb) { return (int)((argb >> 24) & 0xFF); } 48 49 DE_INLINE deARGB deARGB_multiply (deARGB argb, int f) 50 { 51 DE_ASSERT(deInRange32(f, 0, 256)); 52 { 53 int r = (deARGB_getRed(argb) * f + 128) >> 8; 54 int g = (deARGB_getGreen(argb) * f + 128) >> 8; 55 int b = (deARGB_getBlue(argb) * f + 128) >> 8; 56 int a = (deARGB_getAlpha(argb) * f + 128) >> 8; 57 return deARGB_set(r, g, b, a); 58 } 59 } 60 61 DE_INLINE deARGB deARGB_add (deARGB a, deARGB b) 62 { 63 return deARGB_set(deClamp32(deARGB_getRed(a) + deARGB_getRed(b), 0, 255), 64 deClamp32(deARGB_getGreen(a) + deARGB_getGreen(b), 0, 255), 65 deClamp32(deARGB_getBlue(a) + deARGB_getBlue(b), 0, 255), 66 deClamp32(deARGB_getAlpha(a) + deARGB_getAlpha(b), 0, 255)); 67 } 68 69 #endif /* _DEARGB_H */ 70
