| |
| /* |
| * 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 "SkBlurMask.h" |
| #include "SkBlurMaskFilter.h" |
| #include "SkCanvas.h" |
| #include "SkMath.h" |
| #include "SkPaint.h" |
| #if SK_SUPPORT_GPU |
| #include "GrContextFactory.h" |
| #include "SkGpuDevice.h" |
| #endif |
| |
| #define WRITE_CSV 0 |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #define ILLEGAL_MODE ((SkXfermode::Mode)-1) |
| |
| static const int outset = 100; |
| static const SkColor bgColor = SK_ColorWHITE; |
| static const int strokeWidth = 4; |
| |
| static void create(SkBitmap* bm, SkIRect bound, SkBitmap::Config config) { |
| bm->setConfig(config, bound.width(), bound.height()); |
| bm->allocPixels(); |
| } |
| |
| static void drawBG(SkCanvas* canvas) { |
| canvas->drawColor(bgColor); |
| } |
| |
| |
| struct BlurTest { |
| void (*addPath)(SkPath*); |
| int viewLen; |
| SkIRect views[9]; |
| }; |
| |
| //Path Draw Procs |
| //Beware that paths themselves my draw differently depending on the clip. |
| static void draw50x50Rect(SkPath* path) { |
| path->addRect(0, 0, SkIntToScalar(50), SkIntToScalar(50)); |
| } |
| |
| //Tests |
| static BlurTest tests[] = { |
| { draw50x50Rect, 3, { |
| //inner half of blur |
| { 0, 0, 50, 50 }, |
| //blur, but no path. |
| { 50 + strokeWidth/2, 50 + strokeWidth/2, 100, 100 }, |
| //just an edge |
| { 40, strokeWidth, 60, 50 - strokeWidth }, |
| }}, |
| }; |
| |
| /** Assumes that the ref draw was completely inside ref canvas -- |
| implies that everything outside is "bgColor". |
| Checks that all overlap is the same and that all non-overlap on the |
| ref is "bgColor". |
| */ |
| static bool compare(const SkBitmap& ref, const SkIRect& iref, |
| const SkBitmap& test, const SkIRect& itest) |
| { |
| const int xOff = itest.fLeft - iref.fLeft; |
| const int yOff = itest.fTop - iref.fTop; |
| |
| SkAutoLockPixels alpRef(ref); |
| SkAutoLockPixels alpTest(test); |
| |
| for (int y = 0; y < test.height(); ++y) { |
| for (int x = 0; x < test.width(); ++x) { |
| SkColor testColor = test.getColor(x, y); |
| int refX = x + xOff; |
| int refY = y + yOff; |
| SkColor refColor; |
| if (refX >= 0 && refX < ref.width() && |
| refY >= 0 && refY < ref.height()) |
| { |
| refColor = ref.getColor(refX, refY); |
| } else { |
| refColor = bgColor; |
| } |
| if (refColor != testColor) { |
| return false; |
| } |
| } |
| } |
| return true; |
| } |
| |
| static void test_blur_drawing(skiatest::Reporter* reporter) { |
| |
| SkPaint paint; |
| paint.setColor(SK_ColorGRAY); |
| paint.setStyle(SkPaint::kStroke_Style); |
| paint.setStrokeWidth(SkIntToScalar(strokeWidth)); |
| |
| SkScalar radius = SkIntToScalar(5); |
| for (int style = 0; style < SkBlurMaskFilter::kBlurStyleCount; ++style) { |
| SkBlurMaskFilter::BlurStyle blurStyle = |
| static_cast<SkBlurMaskFilter::BlurStyle>(style); |
| |
| const uint32_t flagPermutations = SkBlurMaskFilter::kAll_BlurFlag; |
| for (uint32_t flags = 0; flags < flagPermutations; ++flags) { |
| SkMaskFilter* filter; |
| filter = SkBlurMaskFilter::Create(radius, blurStyle, flags); |
| |
| paint.setMaskFilter(filter); |
| filter->unref(); |
| |
| for (size_t test = 0; test < SK_ARRAY_COUNT(tests); ++test) { |
| SkPath path; |
| tests[test].addPath(&path); |
| SkPath strokedPath; |
| paint.getFillPath(path, &strokedPath); |
| SkRect refBound = strokedPath.getBounds(); |
| SkIRect iref; |
| refBound.roundOut(&iref); |
| iref.inset(-outset, -outset); |
| SkBitmap refBitmap; |
| create(&refBitmap, iref, SkBitmap::kARGB_8888_Config); |
| |
| SkCanvas refCanvas(refBitmap); |
| refCanvas.translate(SkIntToScalar(-iref.fLeft), |
| SkIntToScalar(-iref.fTop)); |
| drawBG(&refCanvas); |
| refCanvas.drawPath(path, paint); |
| |
| for (int view = 0; view < tests[test].viewLen; ++view) { |
| SkIRect itest = tests[test].views[view]; |
| SkBitmap testBitmap; |
| create(&testBitmap, itest, SkBitmap::kARGB_8888_Config); |
| |
| SkCanvas testCanvas(testBitmap); |
| testCanvas.translate(SkIntToScalar(-itest.fLeft), |
| SkIntToScalar(-itest.fTop)); |
| drawBG(&testCanvas); |
| testCanvas.drawPath(path, paint); |
| |
| REPORTER_ASSERT(reporter, |
| compare(refBitmap, iref, testBitmap, itest)); |
| } |
| } |
| } |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| // Use SkBlurMask::BlurGroundTruth to blur a 'width' x 'height' solid |
| // white rect. Return the right half of the middle row in 'result'. |
| static void ground_truth_2d(int width, int height, |
| SkScalar sigma, |
| int* result, int resultCount) { |
| SkMask src, dst; |
| |
| src.fBounds.set(0, 0, width, height); |
| src.fFormat = SkMask::kA8_Format; |
| src.fRowBytes = src.fBounds.width(); |
| src.fImage = SkMask::AllocImage(src.computeTotalImageSize()); |
| |
| memset(src.fImage, 0xff, src.computeTotalImageSize()); |
| |
| dst.fImage = NULL; |
| SkBlurMask::BlurGroundTruth(sigma, &dst, src, SkBlurMask::kNormal_Style); |
| |
| int midX = dst.fBounds.centerX(); |
| int midY = dst.fBounds.centerY(); |
| uint8_t* bytes = dst.getAddr8(midX, midY); |
| int i; |
| for (i = 0; i < dst.fBounds.width()-(midX-dst.fBounds.fLeft); ++i) { |
| if (i < resultCount) { |
| result[i] = bytes[i]; |
| } |
| } |
| for ( ; i < resultCount; ++i) { |
| result[i] = 0; |
| } |
| } |
| |
| // Implement a step function that is 255 between min and max; 0 elsewhere. |
| static int step(int x, SkScalar min, SkScalar max) { |
| if (min < x && x < max) { |
| return 255; |
| } |
| return 0; |
| } |
| |
| // Implement a Gaussian function with 0 mean and std.dev. of 'sigma'. |
| static float gaussian(int x, SkScalar sigma) { |
| float k = SK_Scalar1/(sigma * sqrtf(2.0f*SK_ScalarPI)); |
| float exponent = -(x * x) / (2 * sigma * sigma); |
| return k * expf(exponent); |
| } |
| |
| // Perform a brute force convolution of a step function with a Gaussian. |
| // Return the right half in 'result' |
| static void brute_force_1d(SkScalar stepMin, SkScalar stepMax, |
| SkScalar gaussianSigma, |
| int* result, int resultCount) { |
| |
| int gaussianRange = SkScalarCeilToInt(10 * gaussianSigma); |
| |
| for (int i = 0; i < resultCount; ++i) { |
| SkScalar sum = 0.0f; |
| for (int j = -gaussianRange; j < gaussianRange; ++j) { |
| sum += gaussian(j, gaussianSigma) * step(i-j, stepMin, stepMax); |
| } |
| |
| result[i] = SkClampMax(SkClampPos(int(sum + 0.5f)), 255); |
| } |
| } |
| |
| static void blur_path(SkCanvas* canvas, const SkPath& path, |
| SkScalar gaussianSigma) { |
| |
| SkScalar midX = path.getBounds().centerX(); |
| SkScalar midY = path.getBounds().centerY(); |
| |
| canvas->translate(-midX, -midY); |
| |
| SkPaint blurPaint; |
| blurPaint.setColor(SK_ColorWHITE); |
| SkMaskFilter* filter = SkBlurMaskFilter::Create(SkBlurMaskFilter::kNormal_BlurStyle, |
| gaussianSigma, |
| SkBlurMaskFilter::kHighQuality_BlurFlag); |
| blurPaint.setMaskFilter(filter)->unref(); |
| |
| canvas->drawColor(SK_ColorBLACK); |
| canvas->drawPath(path, blurPaint); |
| } |
| |
| // Readback the blurred draw results from the canvas |
| static void readback(SkCanvas* canvas, int* result, int resultCount) { |
| SkBitmap readback; |
| readback.setConfig(SkBitmap::kARGB_8888_Config, resultCount, 30); |
| readback.allocPixels(); |
| |
| SkIRect readBackRect = { 0, 0, resultCount, 30 }; |
| |
| canvas->readPixels(readBackRect, &readback); |
| |
| readback.lockPixels(); |
| SkPMColor* pixels = (SkPMColor*) readback.getAddr32(0, 15); |
| |
| for (int i = 0; i < resultCount; ++i) { |
| result[i] = SkColorGetR(pixels[i]); |
| } |
| } |
| |
| // Draw a blurred version of the provided path. |
| // Return the right half of the middle row in 'result'. |
| static void cpu_blur_path(const SkPath& path, SkScalar gaussianSigma, |
| int* result, int resultCount) { |
| |
| SkBitmap bitmap; |
| bitmap.setConfig(SkBitmap::kARGB_8888_Config, resultCount, 30); |
| bitmap.allocPixels(); |
| SkCanvas canvas(bitmap); |
| |
| blur_path(&canvas, path, gaussianSigma); |
| readback(&canvas, result, resultCount); |
| } |
| |
| #if SK_SUPPORT_GPU |
| static void gpu_blur_path(GrContextFactory* factory, const SkPath& path, |
| SkScalar gaussianSigma, |
| int* result, int resultCount) { |
| |
| GrContext* grContext = factory->get(GrContextFactory::kNative_GLContextType); |
| if (NULL == grContext) { |
| return; |
| } |
| |
| GrTextureDesc desc; |
| desc.fConfig = kSkia8888_GrPixelConfig; |
| desc.fFlags = kRenderTarget_GrTextureFlagBit; |
| desc.fWidth = resultCount; |
| desc.fHeight = 30; |
| desc.fSampleCnt = 0; |
| |
| SkAutoTUnref<GrTexture> texture(grContext->createUncachedTexture(desc, NULL, 0)); |
| SkAutoTUnref<SkGpuDevice> device(SkNEW_ARGS(SkGpuDevice, (grContext, texture.get()))); |
| SkCanvas canvas(device.get()); |
| |
| blur_path(&canvas, path, gaussianSigma); |
| readback(&canvas, result, resultCount); |
| } |
| #endif |
| |
| #if WRITE_CSV |
| static void write_as_csv(const char* label, SkScalar scale, int* data, int count) { |
| SkDebugf("%s_%.2f,", label, scale); |
| for (int i = 0; i < count-1; ++i) { |
| SkDebugf("%d,", data[i]); |
| } |
| SkDebugf("%d\n", data[count-1]); |
| } |
| #endif |
| |
| static bool match(int* first, int* second, int count, int tol) { |
| int delta; |
| for (int i = 0; i < count; ++i) { |
| delta = first[i] - second[i]; |
| if (delta > tol || delta < -tol) { |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| // Test out the normal blur style with a wide range of sigmas |
| static void test_sigma_range(skiatest::Reporter* reporter, GrContextFactory* factory) { |
| |
| static const int kSize = 100; |
| |
| // The geometry is offset a smidge to trigger: |
| // https://code.google.com/p/chromium/issues/detail?id=282418 |
| SkPath rectPath; |
| rectPath.addRect(0.3f, 0.3f, 100.3f, 100.3f); |
| |
| SkPoint polyPts[] = { |
| { 0.3f, 0.3f }, |
| { 100.3f, 0.3f }, |
| { 100.3f, 100.3f }, |
| { 0.3f, 100.3f }, |
| { 2.3f, 50.3f } // a little divet to throw off the rect special case |
| }; |
| SkPath polyPath; |
| polyPath.addPoly(polyPts, SK_ARRAY_COUNT(polyPts), true); |
| |
| int rectSpecialCaseResult[kSize]; |
| int generalCaseResult[kSize]; |
| #if SK_SUPPORT_GPU |
| int gpuResult[kSize]; |
| #endif |
| int groundTruthResult[kSize]; |
| int bruteForce1DResult[kSize]; |
| |
| SkScalar sigma = SkFloatToScalar(10.0f); |
| |
| for (int i = 0; i < 4; ++i, sigma /= 10) { |
| |
| cpu_blur_path(rectPath, sigma, rectSpecialCaseResult, kSize); |
| cpu_blur_path(polyPath, sigma, generalCaseResult, kSize); |
| #if SK_SUPPORT_GPU |
| gpu_blur_path(factory, rectPath, sigma, gpuResult, kSize); |
| #endif |
| ground_truth_2d(100, 100, sigma, groundTruthResult, kSize); |
| brute_force_1d(-50.0f, 50.0f, sigma, bruteForce1DResult, kSize); |
| |
| REPORTER_ASSERT(reporter, match(rectSpecialCaseResult, bruteForce1DResult, kSize, 5)); |
| REPORTER_ASSERT(reporter, match(generalCaseResult, bruteForce1DResult, kSize, 15)); |
| #if SK_SUPPORT_GPU |
| // 1 works everywhere but: Ubuntu13 & Nexus4 |
| REPORTER_ASSERT(reporter, match(gpuResult, bruteForce1DResult, kSize, 10)); |
| #endif |
| REPORTER_ASSERT(reporter, match(groundTruthResult, bruteForce1DResult, kSize, 1)); |
| |
| #if WRITE_CSV |
| write_as_csv("RectSpecialCase", sigma, rectSpecialCaseResult, kSize); |
| write_as_csv("GeneralCase", sigma, generalCaseResult, kSize); |
| #if SK_SUPPORT_GPU |
| write_as_csv("GPU", sigma, gpuResult, kSize); |
| #endif |
| write_as_csv("GroundTruth2D", sigma, groundTruthResult, kSize); |
| write_as_csv("BruteForce1D", sigma, bruteForce1DResult, kSize); |
| #endif |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static void test_blur(skiatest::Reporter* reporter, GrContextFactory* factory) { |
| test_blur_drawing(reporter); |
| test_sigma_range(reporter, factory); |
| } |
| |
| #include "TestClassDef.h" |
| DEFINE_GPUTESTCLASS("BlurMaskFilter", BlurTestClass, test_blur) |