ea26a0e14f
TBR=mtklein@google.com Author: reed@google.com Review URL: https://codereview.chromium.org/248713003 git-svn-id: http://skia.googlecode.com/svn/trunk@14322 2bbb7eff-a529-9590-31e7-b0007b416f81
120 lines
2.8 KiB
C++
120 lines
2.8 KiB
C++
/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkRandom.h"
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#include "Test.h"
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#include "gradients/SkClampRange.h"
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static skiatest::Reporter* gReporter;
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static void debug_me() {
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if (NULL == gReporter) {
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SkDebugf("dsfdssd\n");
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}
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}
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#ifdef USE_REPORTER
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#define R_ASSERT(cond) \
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do { if (!(cond)) { \
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debug_me(); \
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REPORTER_ASSERT(gReporter, cond); \
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}} while (0)
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#else
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#define R_ASSERT(cond) \
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do { if (!(cond)) { \
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debug_me(); \
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}} while (0)
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#endif
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static int classify_value(SkFixed fx, int v0, int v1) {
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if (fx <= 0) {
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return v0;
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}
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if (fx >= 0xFFFF) {
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return v1;
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}
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R_ASSERT(false);
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return 0;
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}
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#define V0 -42
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#define V1 1024
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static void slow_check(const SkClampRange& range,
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SkFixed fx, SkFixed dx, int count) {
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SkASSERT(range.fCount0 + range.fCount1 + range.fCount2 == count);
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for (int i = 0; i < range.fCount0; i++) {
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int v = classify_value(fx, V0, V1);
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R_ASSERT(v == range.fV0);
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fx += dx;
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}
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if (range.fCount1 > 0 && fx != range.fFx1) {
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// SkDebugf("%x %x\n", fx, range.fFx1);
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R_ASSERT(false); // bad fFx1
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return;
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}
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for (int i = 0; i < range.fCount1; i++) {
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R_ASSERT(fx >= 0 && fx <= 0xFFFF);
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fx += dx;
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}
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for (int i = 0; i < range.fCount2; i++) {
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int v = classify_value(fx, V0, V1);
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R_ASSERT(v == range.fV1);
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fx += dx;
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}
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}
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static void test_range(SkFixed fx, SkFixed dx, int count) {
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SkClampRange range;
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range.init(fx, dx, count, V0, V1);
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slow_check(range, fx, dx, count);
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}
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#define ff(x) SkIntToFixed(x)
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DEF_TEST(ClampRange, reporter) {
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gReporter = reporter;
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test_range(0, 0, 20);
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test_range(0xFFFF, 0, 20);
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test_range(-ff(2), 0, 20);
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test_range( ff(2), 0, 20);
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test_range(-10, 1, 20);
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test_range(10, -1, 20);
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test_range(-10, 3, 20);
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test_range(10, -3, 20);
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test_range(ff(1), ff(16384), 100);
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test_range(ff(-1), ff(-16384), 100);
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test_range(ff(1)/2, ff(16384), 100);
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test_range(ff(1)/2, ff(-16384), 100);
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SkRandom rand;
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// test non-overflow cases
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for (int i = 0; i < 1000000; i++) {
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SkFixed fx = rand.nextS() >> 1;
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SkFixed sx = rand.nextS() >> 1;
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int count = rand.nextU() % 1000 + 1;
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SkFixed dx = (sx - fx) / count;
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test_range(fx, dx, count);
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}
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// test overflow cases
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for (int i = 0; i < 100000; i++) {
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SkFixed fx = rand.nextS();
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SkFixed dx = rand.nextS();
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int count = rand.nextU() % 1000 + 1;
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test_range(fx, dx, count);
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}
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}
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