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/*
* Copyright 2013 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 "SkBitmap.h"
#include "SkCanvas.h"
#include "SkPathUtils.h"
#include "SkRandom.h"
#include "SkTime.h"
#define NUM_IT 1000
#define ON 0xFF000000 // black pixel
#define OFF 0x00000000 // transparent pixel
class SkBitmap;
//this function is redefined for sample, test, and bench. is there anywhere
// I can put it to avoid code duplcation?
static void fillRandomBits( int chars, char* bits ){
SkMWCRandom rand(SkTime::GetMSecs());
for (int i = 0; i < chars; ++i){
bits[i] = rand.nextU();
}
}
//also defined within PathUtils.cpp, but not in scope here. Anyway to call it
// without re-defining it?
static int getBit( const char* buffer, int x ) {
int byte = x >> 3;
int bit = x & 7;
return buffer[byte] & (1 << bit);
}
static void bin2SkBitmap(const char* bin_bmp, SkBitmap* sk_bmp,
int h, int w, int stride){
//init the SkBitmap
sk_bmp->setConfig(SkBitmap::kARGB_8888_Config, w, h);
sk_bmp->allocPixels();
for (int y = 0; y < h; ++y) { // for every row
const char* curLine = &bin_bmp[y * stride];
for (int x = 0; x < w; ++x) {// for every pixel
if (getBit(curLine, x)) {
*sk_bmp->getAddr32(x,y) = ON;
}
else {
*sk_bmp->getAddr32(x,y) = OFF;
}
}
}
}
static bool test_bmp(skiatest::Reporter* reporter,
const SkBitmap* bmp1, const SkBitmap* bmp2,
int h, int w) {
for (int y = 0; y < h; ++y) { // loop through all pixels
for (int x = 0; x < w; ++x) {
REPORTER_ASSERT( reporter, *bmp1->getAddr32(x,y) == *bmp1->getAddr32(x,y) );
}
}
return true;
}
static void test_path_eq(skiatest::Reporter* reporter, const SkPath* path,
const SkBitmap* truth, int h, int w){
// make paint
SkPaint bmpPaint;
bmpPaint.setAntiAlias(true); // Black paint for bitmap
bmpPaint.setStyle(SkPaint::kFill_Style);
bmpPaint.setColor(SK_ColorBLACK);
// make bmp
SkBitmap bmp;
bmp.setConfig(SkBitmap::kARGB_8888_Config, w, h);
bmp.allocPixels();
SkCanvas(bmp).drawPath(*path, bmpPaint);
// test bmp
test_bmp(reporter, &bmp, truth, h, w);
}
static void test_path(skiatest::Reporter* reporter, const SkBitmap* truth,
const char* bin_bmp, int h, int w, int stride){
// make path
SkPath path;
SkPathUtils::BitsToPath_Path(&path, bin_bmp, h, w, stride);
//test for correctness
test_path_eq(reporter, &path, truth, h, w);
}
static void test_region(skiatest::Reporter* reporter, const SkBitmap* truth,
const char* bin_bmp, int h, int w, int stride){
//generate bitmap
SkPath path;
SkPathUtils::BitsToPath_Region(&path, bin_bmp, h, w, stride);
//test for correctness
test_path_eq(reporter, &path, truth, h, w);
}
#define W_tests 4
static void TestPathUtils(skiatest::Reporter* reporter) {
const int w[W_tests] = {4, 8, 12, 16};
const int h = 8, stride = 4;
char bits[ h * stride ];
static char* bin_bmp = &bits[0];
//loop to run randomized test lots of times
for (int it = 0; it < NUM_IT; ++it)
{
// generate a random binary bitmap
fillRandomBits( h * stride, bin_bmp); // generate random bitmap
// for each bitmap width, use subset of binary bitmap
for (int i = 0; i < W_tests; ++i) {
// generate truth bitmap
SkBitmap bmpTruth;
bin2SkBitmap(bin_bmp, &bmpTruth, h, w[i], stride);
test_path(reporter, &bmpTruth, bin_bmp, h, w[i], stride);
test_region(reporter, &bmpTruth, bin_bmp, h, w[i], stride);
}
}
}
#include "TestClassDef.h"
DEFINE_TESTCLASS("PathUtils", PathUtils, TestPathUtils)
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