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add test that aaclip.setRegion creates the same mask as the region

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... in prep for optimizatin work on setRegion.



git-svn-id: http://skia.googlecode.com/svn/trunk@2739 2bbb7eff-a529-9590-31e7-b0007b416f81
This commit is contained in:
mike@reedtribe.org 2011-11-23 03:12:58 +00:00
parent 259210c376
commit 95b85bd1ba
1 changed files with 112 additions and 0 deletions
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112
tests/AAClipTest.cpp
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@ -7,9 +7,120 @@
#include "Test.h"
#include "SkAAClip.h"
#include "SkCanvas.h"
#include "SkMask.h"
#include "SkPath.h"
#include "SkRandom.h"
static bool operator==(const SkMask& a, const SkMask& b) {
if (a.fFormat != b.fFormat || a.fBounds != b.fBounds) {
return false;
}
if (!a.fImage && !b.fImage) {
return true;
}
if (!a.fImage || !b.fImage) {
return false;
}
size_t wbytes = a.fBounds.width();
switch (a.fFormat) {
case SkMask::kBW_Format:
wbytes = (wbytes + 7) >> 3;
break;
case SkMask::kA8_Format:
case SkMask::k3D_Format:
break;
case SkMask::kLCD16_Format:
wbytes <<= 1;
break;
case SkMask::kLCD32_Format:
case SkMask::kARGB32_Format:
wbytes <<= 2;
break;
default:
SkASSERT(!"unknown mask format");
return false;
}
const int h = a.fBounds.height();
const char* aptr = (const char*)a.fImage;
const char* bptr = (const char*)b.fImage;
for (int y = 0; y < h; ++y) {
if (memcmp(aptr, bptr, wbytes)) {
return false;
}
aptr += wbytes;
bptr += wbytes;
}
return true;
}
static void copyToMask(const SkRegion& rgn, SkMask* mask) {
if (rgn.isEmpty()) {
mask->fImage = NULL;
mask->fBounds.setEmpty();
mask->fRowBytes = 0;
return;
}
mask->fBounds = rgn.getBounds();
mask->fRowBytes = mask->fBounds.width();
mask->fFormat = SkMask::kA8_Format;
mask->fImage = SkMask::AllocImage(mask->computeImageSize());
sk_bzero(mask->fImage, mask->computeImageSize());
SkBitmap bitmap;
bitmap.setConfig(SkBitmap::kA8_Config, mask->fBounds.width(),
mask->fBounds.height(), mask->fRowBytes);
bitmap.setPixels(mask->fImage);
// canvas expects its coordinate system to always be 0,0 in the top/left
// so we translate the rgn to match that before drawing into the mask.
//
SkRegion tmpRgn(rgn);
tmpRgn.translate(-rgn.getBounds().fLeft, -rgn.getBounds().fTop);
SkCanvas canvas(bitmap);
canvas.clipRegion(tmpRgn);
canvas.drawColor(SK_ColorBLACK);
}
static SkIRect rand_rect(SkRandom& rand, int n) {
int x = rand.nextS() % n;
int y = rand.nextS() % n;
int w = rand.nextU() % n;
int h = rand.nextU() % n;
return SkIRect::MakeXYWH(x, y, w, h);
}
static void make_rand_rgn(SkRegion* rgn, SkRandom& rand) {
int count = rand.nextU() % 20;
for (int i = 0; i < count; ++i) {
rgn->op(rand_rect(rand, 100), SkRegion::kXOR_Op);
}
}
// aaclip.setRegion should create idential masks to the region
static void test_rgn(skiatest::Reporter* reporter) {
SkRandom rand;
for (int i = 0; i < 1000; i++) {
SkRegion rgn;
make_rand_rgn(&rgn, rand);
SkMask mask0;
copyToMask(rgn, &mask0);
SkAAClip aaclip;
aaclip.setRegion(rgn);
SkMask mask1;
aaclip.copyToMask(&mask1);
REPORTER_ASSERT(reporter, mask0 == mask1);
SkMask::FreeImage(mask0.fImage);
SkMask::FreeImage(mask1.fImage);
}
}
static const SkRegion::Op gRgnOps[] = {
SkRegion::kDifference_Op,
SkRegion::kIntersect_Op,
@ -138,6 +249,7 @@ static void TestAAClip(skiatest::Reporter* reporter) {
test_empty(reporter);
test_path_bounds(reporter);
test_irect(reporter);
test_rgn(reporter);
}
#include "TestClassDef.h"