1676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org 2ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com/* 3ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * Copyright 2011 Google Inc. 4ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * 5ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * Use of this source code is governed by a BSD-style license that can be 6ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * found in the LICENSE file. 7676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org */ 8676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org 9ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com 10676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org#ifndef SkClampRange_DEFINED 11676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org#define SkClampRange_DEFINED 12676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org 13676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org#include "SkFixed.h" 14676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org 15676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org/** 16676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org * Iteration fixed fx by dx, clamping as you go to [0..0xFFFF], this class 17676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org * computes the (up to) 3 spans there are: 18676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org * 19676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org * range0: use constant value V0 20676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org * range1: iterate as usual fx += dx 21676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org * range2: use constant value V1 22676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org */ 23676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.orgstruct SkClampRange { 24676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org int fCount0; // count for fV0 25676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org int fCount1; // count for interpolating (fV0...fV1) 26676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org int fCount2; // count for fV1 2763c1ad82fc4232daff1b686cc78bba4c6a42916dreed@google.com SkFixed fFx1; // initial fx value for the fCount1 range. 2863c1ad82fc4232daff1b686cc78bba4c6a42916dreed@google.com // only valid if fCount1 > 0 29676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org int fV0, fV1; 30676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org 31676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org void init(SkFixed fx, SkFixed dx, int count, int v0, int v1); 3213659f1f8d2e705c565203d45870b1afcd47cf98reed@google.com 3313659f1f8d2e705c565203d45870b1afcd47cf98reed@google.comprivate: 3413659f1f8d2e705c565203d45870b1afcd47cf98reed@google.com void initFor1(SkFixed fx); 35676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org}; 36676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org 37676d69b82f2e2c6bf743ff8c7fbb436f36a004e2mike@reedtribe.org#endif 38