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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Test.h"
#include "SkClampRange.h"
#include "SkRandom.h"
static skiatest::Reporter* gReporter;
static void debug_me() {
if (NULL == gReporter) {
SkDebugf("dsfdssd\n");
}
}
#ifdef USE_REPORTER
#define R_ASSERT(cond) \
do { if (!(cond)) { \
debug_me(); \
REPORTER_ASSERT(gReporter, cond); \
}} while (0)
#else
#define R_ASSERT(cond) \
do { if (!(cond)) { \
debug_me(); \
}} while (0)
#endif
static int classify_value(SkFixed fx, int v0, int v1) {
if (fx <= 0) {
return v0;
}
if (fx >= 0xFFFF) {
return v1;
}
R_ASSERT(false);
return 0;
}
#define V0 -42
#define V1 1024
static void slow_check(const SkClampRange& range,
SkFixed fx, SkFixed dx, int count) {
SkASSERT(range.fCount0 + range.fCount1 + range.fCount2 == count);
int i;
if (range.fOverflowed) {
fx = range.fFx1;
for (i = 0; i < range.fCount1; i++) {
R_ASSERT(fx >= 0 && fx <= 0xFFFF);
fx += dx;
}
} else {
for (i = 0; i < range.fCount0; i++) {
int v = classify_value(fx, V0, V1);
R_ASSERT(v == range.fV0);
fx += dx;
}
if (range.fCount1 > 0 && fx != range.fFx1) {
SkDebugf("%x %x\n", fx, range.fFx1);
R_ASSERT(!"bad fFx1");
return;
}
for (i = 0; i < range.fCount1; i++) {
R_ASSERT(fx >= 0 && fx <= 0xFFFF);
fx += dx;
}
for (i = 0; i < range.fCount2; i++) {
int v = classify_value(fx, V0, V1);
R_ASSERT(v == range.fV1);
fx += dx;
}
}
}
static void test_range(SkFixed fx, SkFixed dx, int count) {
SkClampRange range;
range.init(fx, dx, count, V0, V1);
slow_check(range, fx, dx, count);
}
#define ff(x) SkIntToFixed(x)
void TestClampRange(skiatest::Reporter* reporter);
void TestClampRange(skiatest::Reporter* reporter) {
gReporter = reporter;
test_range(0, 0, 20);
test_range(0xFFFF, 0, 20);
test_range(-ff(2), 0, 20);
test_range( ff(2), 0, 20);
test_range(-10, 1, 20);
test_range(10, -1, 20);
test_range(-10, 3, 20);
test_range(10, -3, 20);
test_range(ff(1), ff(16384), 100);
test_range(ff(-1), ff(-16384), 100);
test_range(ff(1)/2, ff(16384), 100);
test_range(ff(1)/2, ff(-16384), 100);
SkRandom rand;
// test non-overflow cases
for (int i = 0; i < 1000000; i++) {
SkFixed fx = rand.nextS() >> 1;
SkFixed sx = rand.nextS() >> 1;
int count = rand.nextU() % 1000 + 1;
SkFixed dx = (sx - fx) / count;
test_range(fx, dx, count);
}
// test overflow cases
for (int i = 0; i < 100000; i++) {
SkFixed fx = rand.nextS();
SkFixed dx = rand.nextS();
int count = rand.nextU() % 1000 + 1;
test_range(fx, dx, count);
}
}
#ifdef USE_REPORTER
#include "TestClassDef.h"
DEFINE_TESTCLASS("ClampRange", ClampRangeClass, TestClampRange)
#endif
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