4cb543d605
Some upcoming work (support for expanding crop rects) requires the clip bounds to be available during filter traversal. This change replaces the SkMatrix parameter in the onFilterImage() traversals with a Context parameter. It contains the CTM, as well as the clip bounds. BUG=skia: R=reed@google.com Review URL: https://codereview.chromium.org/189913021 git-svn-id: http://skia.googlecode.com/svn/trunk@13803 2bbb7eff-a529-9590-31e7-b0007b416f81
307 lines
12 KiB
C++
307 lines
12 KiB
C++
/*
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* Copyright 2013 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 "SkBicubicImageFilter.h"
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#include "SkBitmap.h"
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#include "SkBitmapDevice.h"
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#include "SkBitmapSource.h"
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#include "SkBlurImageFilter.h"
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#include "SkCanvas.h"
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#include "SkColorFilterImageFilter.h"
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#include "SkColorMatrixFilter.h"
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#include "SkDeviceImageFilterProxy.h"
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#include "SkDisplacementMapEffect.h"
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#include "SkDropShadowImageFilter.h"
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#include "SkFlattenableBuffers.h"
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#include "SkLightingImageFilter.h"
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#include "SkMatrixConvolutionImageFilter.h"
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#include "SkMergeImageFilter.h"
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#include "SkMorphologyImageFilter.h"
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#include "SkOffsetImageFilter.h"
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#include "SkPicture.h"
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#include "SkRect.h"
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#include "SkTileImageFilter.h"
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#include "SkXfermodeImageFilter.h"
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#include "Test.h"
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#if SK_SUPPORT_GPU
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#include "GrContextFactory.h"
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#include "SkGpuDevice.h"
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#endif
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static const int kBitmapSize = 4;
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namespace {
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class MatrixTestImageFilter : public SkImageFilter {
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public:
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MatrixTestImageFilter(skiatest::Reporter* reporter, const SkMatrix& expectedMatrix)
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: SkImageFilter(0), fReporter(reporter), fExpectedMatrix(expectedMatrix) {
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}
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virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context& ctx,
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SkBitmap* result, SkIPoint* offset) const SK_OVERRIDE {
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REPORTER_ASSERT(fReporter, ctx.ctm() == fExpectedMatrix);
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return true;
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}
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SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(MatrixTestImageFilter)
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protected:
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explicit MatrixTestImageFilter(SkReadBuffer& buffer) : SkImageFilter(0) {
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fReporter = static_cast<skiatest::Reporter*>(buffer.readFunctionPtr());
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buffer.readMatrix(&fExpectedMatrix);
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}
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virtual void flatten(SkWriteBuffer& buffer) const SK_OVERRIDE {
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buffer.writeFunctionPtr(fReporter);
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buffer.writeMatrix(fExpectedMatrix);
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}
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private:
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skiatest::Reporter* fReporter;
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SkMatrix fExpectedMatrix;
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};
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}
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static void make_small_bitmap(SkBitmap& bitmap) {
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bitmap.allocN32Pixels(kBitmapSize, kBitmapSize);
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SkCanvas canvas(bitmap);
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canvas.clear(0x00000000);
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SkPaint darkPaint;
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darkPaint.setColor(0xFF804020);
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SkPaint lightPaint;
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lightPaint.setColor(0xFF244484);
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const int i = kBitmapSize / 4;
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for (int y = 0; y < kBitmapSize; y += i) {
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for (int x = 0; x < kBitmapSize; x += i) {
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canvas.save();
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canvas.translate(SkIntToScalar(x), SkIntToScalar(y));
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canvas.drawRect(SkRect::MakeXYWH(0, 0,
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SkIntToScalar(i),
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SkIntToScalar(i)), darkPaint);
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canvas.drawRect(SkRect::MakeXYWH(SkIntToScalar(i),
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0,
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SkIntToScalar(i),
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SkIntToScalar(i)), lightPaint);
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canvas.drawRect(SkRect::MakeXYWH(0,
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SkIntToScalar(i),
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SkIntToScalar(i),
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SkIntToScalar(i)), lightPaint);
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canvas.drawRect(SkRect::MakeXYWH(SkIntToScalar(i),
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SkIntToScalar(i),
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SkIntToScalar(i),
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SkIntToScalar(i)), darkPaint);
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canvas.restore();
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}
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}
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}
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static SkImageFilter* make_scale(float amount, SkImageFilter* input = NULL) {
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SkScalar s = amount;
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SkScalar matrix[20] = { s, 0, 0, 0, 0,
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0, s, 0, 0, 0,
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0, 0, s, 0, 0,
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0, 0, 0, s, 0 };
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SkAutoTUnref<SkColorFilter> filter(SkColorMatrixFilter::Create(matrix));
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return SkColorFilterImageFilter::Create(filter, input);
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}
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static SkImageFilter* make_grayscale(SkImageFilter* input = NULL, const SkImageFilter::CropRect* cropRect = NULL) {
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SkScalar matrix[20];
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memset(matrix, 0, 20 * sizeof(SkScalar));
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matrix[0] = matrix[5] = matrix[10] = 0.2126f;
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matrix[1] = matrix[6] = matrix[11] = 0.7152f;
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matrix[2] = matrix[7] = matrix[12] = 0.0722f;
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matrix[18] = 1.0f;
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SkAutoTUnref<SkColorFilter> filter(SkColorMatrixFilter::Create(matrix));
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return SkColorFilterImageFilter::Create(filter, input, cropRect);
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}
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DEF_TEST(ImageFilter, reporter) {
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{
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// Check that two non-clipping color matrices concatenate into a single filter.
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SkAutoTUnref<SkImageFilter> halfBrightness(make_scale(0.5f));
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SkAutoTUnref<SkImageFilter> quarterBrightness(make_scale(0.5f, halfBrightness));
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REPORTER_ASSERT(reporter, NULL == quarterBrightness->getInput(0));
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}
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{
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// Check that a clipping color matrix followed by a grayscale does not concatenate into a single filter.
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SkAutoTUnref<SkImageFilter> doubleBrightness(make_scale(2.0f));
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SkAutoTUnref<SkImageFilter> halfBrightness(make_scale(0.5f, doubleBrightness));
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REPORTER_ASSERT(reporter, NULL != halfBrightness->getInput(0));
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}
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{
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// Check that a color filter image filter without a crop rect can be
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// expressed as a color filter.
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SkAutoTUnref<SkImageFilter> gray(make_grayscale());
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REPORTER_ASSERT(reporter, true == gray->asColorFilter(NULL));
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}
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{
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// Check that a color filter image filter with a crop rect cannot
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// be expressed as a color filter.
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SkImageFilter::CropRect cropRect(SkRect::MakeXYWH(0, 0, 100, 100));
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SkAutoTUnref<SkImageFilter> grayWithCrop(make_grayscale(NULL, &cropRect));
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REPORTER_ASSERT(reporter, false == grayWithCrop->asColorFilter(NULL));
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}
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{
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// Tests pass by not asserting
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SkBitmap bitmap, result;
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make_small_bitmap(bitmap);
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result.allocN32Pixels(kBitmapSize, kBitmapSize);
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{
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// This tests for :
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// 1 ) location at (0,0,1)
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SkPoint3 location(0, 0, SK_Scalar1);
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// 2 ) location and target at same value
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SkPoint3 target(location.fX, location.fY, location.fZ);
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// 3 ) large negative specular exponent value
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SkScalar specularExponent = -1000;
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SkAutoTUnref<SkImageFilter> bmSrc(SkBitmapSource::Create(bitmap));
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SkPaint paint;
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paint.setImageFilter(SkLightingImageFilter::CreateSpotLitSpecular(
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location, target, specularExponent, 180,
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0xFFFFFFFF, SK_Scalar1, SK_Scalar1, SK_Scalar1,
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bmSrc))->unref();
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SkCanvas canvas(result);
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SkRect r = SkRect::MakeWH(SkIntToScalar(kBitmapSize),
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SkIntToScalar(kBitmapSize));
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canvas.drawRect(r, paint);
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}
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{
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// This tests for scale bringing width to 0
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SkSize scale = SkSize::Make(-0.001f, SK_Scalar1);
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SkAutoTUnref<SkImageFilter> bmSrc(SkBitmapSource::Create(bitmap));
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SkAutoTUnref<SkBicubicImageFilter> bicubic(
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SkBicubicImageFilter::CreateMitchell(scale, bmSrc));
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SkBitmapDevice device(bitmap);
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SkDeviceImageFilterProxy proxy(&device);
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SkIPoint loc = SkIPoint::Make(0, 0);
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// An empty input should early return and return false
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SkImageFilter::Context ctx(SkMatrix::I(), SkIRect::MakeEmpty());
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REPORTER_ASSERT(reporter,
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!bicubic->filterImage(&proxy, bitmap, ctx, &result, &loc));
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}
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}
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}
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static void test_crop_rects(SkBaseDevice* device, skiatest::Reporter* reporter) {
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// Check that all filters offset to their absolute crop rect,
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// unaffected by the input crop rect.
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// Tests pass by not asserting.
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SkBitmap bitmap;
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bitmap.allocN32Pixels(100, 100);
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bitmap.eraseARGB(0, 0, 0, 0);
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SkDeviceImageFilterProxy proxy(device);
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SkImageFilter::CropRect inputCropRect(SkRect::MakeXYWH(8, 13, 80, 80));
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SkImageFilter::CropRect cropRect(SkRect::MakeXYWH(20, 30, 60, 60));
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SkAutoTUnref<SkImageFilter> input(make_grayscale(NULL, &inputCropRect));
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SkAutoTUnref<SkColorFilter> cf(SkColorFilter::CreateModeFilter(SK_ColorRED, SkXfermode::kSrcIn_Mode));
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SkPoint3 location(0, 0, SK_Scalar1);
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SkPoint3 target(SK_Scalar1, SK_Scalar1, SK_Scalar1);
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SkScalar kernel[9] = {
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SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
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SkIntToScalar( 1), SkIntToScalar(-7), SkIntToScalar( 1),
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SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
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};
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SkISize kernelSize = SkISize::Make(3, 3);
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SkScalar gain = SK_Scalar1, bias = 0;
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SkImageFilter* filters[] = {
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SkColorFilterImageFilter::Create(cf.get(), input.get(), &cropRect),
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SkDisplacementMapEffect::Create(SkDisplacementMapEffect::kR_ChannelSelectorType,
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SkDisplacementMapEffect::kB_ChannelSelectorType,
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40.0f, input.get(), input.get(), &cropRect),
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SkBlurImageFilter::Create(SK_Scalar1, SK_Scalar1, input.get(), &cropRect),
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SkDropShadowImageFilter::Create(SK_Scalar1, SK_Scalar1, SK_Scalar1, SK_Scalar1, SK_ColorGREEN, input.get(), &cropRect),
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SkLightingImageFilter::CreatePointLitDiffuse(location, SK_ColorGREEN, 0, 0, input.get(), &cropRect),
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SkLightingImageFilter::CreatePointLitSpecular(location, SK_ColorGREEN, 0, 0, 0, input.get(), &cropRect),
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SkMatrixConvolutionImageFilter::Create(kernelSize, kernel, gain, bias, SkIPoint::Make(1, 1), SkMatrixConvolutionImageFilter::kRepeat_TileMode, false, input.get(), &cropRect),
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SkMergeImageFilter::Create(input.get(), input.get(), SkXfermode::kSrcOver_Mode, &cropRect),
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SkOffsetImageFilter::Create(SK_Scalar1, SK_Scalar1, input.get(), &cropRect),
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SkOffsetImageFilter::Create(SK_Scalar1, SK_Scalar1, input.get(), &cropRect),
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SkDilateImageFilter::Create(3, 2, input.get(), &cropRect),
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SkErodeImageFilter::Create(2, 3, input.get(), &cropRect),
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SkTileImageFilter::Create(inputCropRect.rect(), cropRect.rect(), input.get()),
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SkXfermodeImageFilter::Create(SkXfermode::Create(SkXfermode::kSrcOver_Mode), input.get(), input.get(), &cropRect),
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};
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for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
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SkImageFilter* filter = filters[i];
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SkBitmap result;
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SkIPoint offset;
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SkString str;
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str.printf("filter %d", static_cast<int>(i));
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SkImageFilter::Context ctx(SkMatrix::I(), SkIRect::MakeEmpty());
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REPORTER_ASSERT_MESSAGE(reporter, filter->filterImage(&proxy, bitmap, ctx, &result, &offset), str.c_str());
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REPORTER_ASSERT_MESSAGE(reporter, offset.fX == 20 && offset.fY == 30, str.c_str());
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}
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for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
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SkSafeUnref(filters[i]);
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}
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}
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DEF_TEST(ImageFilterCropRect, reporter) {
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SkBitmap temp;
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temp.allocN32Pixels(100, 100);
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SkBitmapDevice device(temp);
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test_crop_rects(&device, reporter);
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}
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DEF_TEST(ImageFilterMatrixTest, reporter) {
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SkBitmap temp;
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temp.allocN32Pixels(100, 100);
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SkBitmapDevice device(temp);
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SkCanvas canvas(&device);
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canvas.scale(SkIntToScalar(2), SkIntToScalar(2));
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SkMatrix expectedMatrix = canvas.getTotalMatrix();
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SkPicture picture;
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SkCanvas* recordingCanvas = picture.beginRecording(100, 100,
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SkPicture::kOptimizeForClippedPlayback_RecordingFlag);
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SkPaint paint;
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SkAutoTUnref<MatrixTestImageFilter> imageFilter(
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new MatrixTestImageFilter(reporter, expectedMatrix));
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paint.setImageFilter(imageFilter.get());
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SkCanvas::SaveFlags saveFlags = static_cast<SkCanvas::SaveFlags>(
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SkCanvas::kHasAlphaLayer_SaveFlag | SkCanvas::kFullColorLayer_SaveFlag);
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recordingCanvas->saveLayer(NULL, &paint, saveFlags);
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SkPaint solidPaint;
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solidPaint.setColor(0xFFFFFFFF);
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recordingCanvas->save();
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recordingCanvas->scale(SkIntToScalar(10), SkIntToScalar(10));
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recordingCanvas->drawRect(SkRect::Make(SkIRect::MakeWH(100, 100)), solidPaint);
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recordingCanvas->restore(); // scale
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recordingCanvas->restore(); // saveLayer
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picture.endRecording();
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canvas.drawPicture(picture);
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}
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#if SK_SUPPORT_GPU
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DEF_GPUTEST(ImageFilterCropRectGPU, reporter, factory) {
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GrContext* context = factory->get(static_cast<GrContextFactory::GLContextType>(0));
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SkAutoTUnref<SkGpuDevice> device(SkGpuDevice::Create(context,
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SkImageInfo::MakeN32Premul(100, 100),
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0));
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test_crop_rects(device, reporter);
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}
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#endif
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