0fb10ab912
This makes part of of our testing infrastructure (i.e., the GMs) compatible with Graphite's more stringent requirements. Bug: skia:12701 Change-Id: I5e42d93050eccc1e455f46e07b64654ad3d4548c Reviewed-on: https://skia-review.googlesource.com/c/skia/+/531997 Reviewed-by: Jim Van Verth <jvanverth@google.com> Commit-Queue: Robert Phillips <robertphillips@google.com>
406 lines
17 KiB
C++
406 lines
17 KiB
C++
/*
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* Copyright 2016 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 "gm/gm.h"
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#include "include/core/SkBlendMode.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkColorFilter.h"
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#include "include/core/SkImage.h"
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#include "include/core/SkImageFilter.h"
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#include "include/core/SkImageInfo.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkPoint.h"
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#include "include/core/SkPoint3.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkRefCnt.h"
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#include "include/core/SkRegion.h"
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#include "include/core/SkScalar.h"
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#include "include/core/SkSize.h"
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#include "include/core/SkString.h"
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#include "include/core/SkSurface.h"
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#include "include/core/SkTypes.h"
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#include "include/effects/SkImageFilters.h"
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#include "include/gpu/GrDirectContext.h"
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#include "tools/Resources.h"
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#include "tools/ToolUtils.h"
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#include <utility>
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///////////////////////////////////////////////////////////////////////////////
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static void show_bounds(SkCanvas* canvas, const SkIRect* clip, const SkIRect* inSubset,
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const SkIRect* outSubset) {
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const SkIRect* rects[] { clip, inSubset, outSubset };
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SkColor colors[] { SK_ColorBLUE, SK_ColorYELLOW, SK_ColorRED };
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SkPaint paint;
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paint.setStyle(SkPaint::kStroke_Style);
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for (size_t i = 0; i < SK_ARRAY_COUNT(rects); ++i) {
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// Skip null bounds rects, since not all methods have subsets
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if (rects[i]) {
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paint.setColor(colors[i]);
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canvas->drawRect(SkRect::Make(*(rects[i])), paint);
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}
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}
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}
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// Factories for creating image filters, either with or without a cropRect
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// (this could go away if there was a SkImageFilter::makeWithCropRect() function, but that seems
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// less generally useful).
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typedef sk_sp<SkImageFilter> (*FilterFactory)(sk_sp<SkImage> auxImage, const SkIRect* cropRect);
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static sk_sp<SkImageFilter> color_filter_factory(sk_sp<SkImage> auxImage, const SkIRect* cropRect) {
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// The color filter uses kSrcIn so that it respects the transparency introduced by clamping;
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// using kSrc would just turn the entire out rect to green regardless.
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auto cf = SkColorFilters::Blend(SK_ColorGREEN, SkBlendMode::kSrcIn);
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return SkImageFilters::ColorFilter(std::move(cf), nullptr, cropRect);
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}
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static sk_sp<SkImageFilter> blur_filter_factory(sk_sp<SkImage> auxImage, const SkIRect* cropRect) {
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return SkImageFilters::Blur(2.0f, 2.0f, nullptr, cropRect);
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}
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static sk_sp<SkImageFilter> drop_shadow_factory(sk_sp<SkImage> auxImage, const SkIRect* cropRect) {
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return SkImageFilters::DropShadow(10.0f, 5.0f, 3.0f, 3.0f, SK_ColorBLUE, nullptr, cropRect);
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}
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static sk_sp<SkImageFilter> offset_factory(sk_sp<SkImage> auxImage, const SkIRect* cropRect) {
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return SkImageFilters::Offset(10.f, 5.f, nullptr, cropRect);
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}
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static sk_sp<SkImageFilter> dilate_factory(sk_sp<SkImage> auxImage, const SkIRect* cropRect) {
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return SkImageFilters::Dilate(10.f, 5.f, nullptr, cropRect);
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}
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static sk_sp<SkImageFilter> erode_factory(sk_sp<SkImage> auxImage, const SkIRect* cropRect) {
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return SkImageFilters::Erode(10.f, 5.f, nullptr, cropRect);
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}
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static sk_sp<SkImageFilter> displacement_factory(sk_sp<SkImage> auxImage, const SkIRect* cropRect) {
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sk_sp<SkImageFilter> displacement = SkImageFilters::Image(std::move(auxImage));
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return SkImageFilters::DisplacementMap(SkColorChannel::kR, SkColorChannel::kG, 40.f,
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std::move(displacement), nullptr, cropRect);
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}
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static sk_sp<SkImageFilter> arithmetic_factory(sk_sp<SkImage> auxImage, const SkIRect* cropRect) {
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sk_sp<SkImageFilter> background = SkImageFilters::Image(std::move(auxImage));
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return SkImageFilters::Arithmetic(0.0f, .6f, 1.f, 0.f, false, std::move(background),
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nullptr, cropRect);
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}
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static sk_sp<SkImageFilter> blend_factory(sk_sp<SkImage> auxImage, const SkIRect* cropRect) {
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sk_sp<SkImageFilter> background = SkImageFilters::Image(std::move(auxImage));
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return SkImageFilters::Blend(
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SkBlendMode::kModulate, std::move(background), nullptr, cropRect);
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}
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static sk_sp<SkImageFilter> convolution_factory(sk_sp<SkImage> auxImage, const SkIRect* cropRect) {
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SkISize kernelSize = SkISize::Make(3, 3);
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SkIPoint kernelOffset = SkIPoint::Make(1, 1);
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// A Laplacian edge detector, ee https://en.wikipedia.org/wiki/Kernel_(image_processing)
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SkScalar kernel[9] = {-1.f, -1.f, -1.f,
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-1.f, 8.f, -1.f,
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-1.f, -1.f, -1.f};
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return SkImageFilters::MatrixConvolution(kernelSize, kernel, 1.f, 0.f, kernelOffset,
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SkTileMode::kClamp, false, nullptr, cropRect);
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}
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static sk_sp<SkImageFilter> matrix_factory(sk_sp<SkImage> auxImage, const SkIRect* cropRect) {
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SkMatrix matrix = SkMatrix::I();
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matrix.setRotate(45.f, 50.f, 50.f);
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// This doesn't support a cropRect
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return SkImageFilters::MatrixTransform(matrix, SkSamplingOptions(SkFilterMode::kLinear), nullptr);
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}
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static sk_sp<SkImageFilter> alpha_threshold_factory(sk_sp<SkImage> auxImage,
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const SkIRect* cropRect) {
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// Centered cross with higher opacity
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SkRegion region(SkIRect::MakeLTRB(30, 45, 70, 55));
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region.op(SkIRect::MakeLTRB(45, 30, 55, 70), SkRegion::kUnion_Op);
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return SkImageFilters::AlphaThreshold(region, 1.f, .2f, nullptr, cropRect);
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}
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static sk_sp<SkImageFilter> lighting_factory(sk_sp<SkImage> auxImage, const SkIRect* cropRect) {
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// Must convert the RGB values of the source to alpha, since that is what the lighting filters
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// use to estimate their normals. This color matrix changes the color to white and the alpha
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// to be equal to the approx. luminance of the original color.
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static const float kMatrix[20] = {
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0.f, 0.f, 0.f, 0.f, 1.f,
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0.f, 0.f, 0.f, 0.f, 1.f,
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0.f, 0.f, 0.f, 0.f, 1.f,
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0.2126f, 0.7152f, 0.0722f, 0.f, 0.f
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};
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sk_sp<SkImageFilter> srcToAlpha = SkImageFilters::ColorFilter(
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SkColorFilters::Matrix(kMatrix), nullptr);
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// Combine both specular and diffuse into a single DAG since they use separate internal filter
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// implementations.
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SkScalar sinAzimuth = SkScalarSin(SkDegreesToRadians(225.f)),
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cosAzimuth = SkScalarCos(SkDegreesToRadians(225.f));
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SkPoint3 spotTarget = SkPoint3::Make(SkIntToScalar(40), SkIntToScalar(40), 0);
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SkPoint3 diffLocation = SkPoint3::Make(spotTarget.fX + 50 * cosAzimuth,
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spotTarget.fY + 50 * sinAzimuth,
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SkIntToScalar(10));
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SkPoint3 specLocation = SkPoint3::Make(spotTarget.fX - 50 * sinAzimuth,
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spotTarget.fY + 50 * cosAzimuth,
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SkIntToScalar(10));
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sk_sp<SkImageFilter> diffuse = SkImageFilters::PointLitDiffuse(
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diffLocation, SK_ColorWHITE, /* scale */ 1.f, /* kd */ 2.f, srcToAlpha, cropRect);
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sk_sp<SkImageFilter> specular = SkImageFilters::PointLitSpecular(
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specLocation, SK_ColorRED, /* scale */ 1.f, /* ks */ 1.f, /* shine */ 8.f,
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srcToAlpha, cropRect);
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return SkImageFilters::Merge(std::move(diffuse), std::move(specular), cropRect);
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}
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static sk_sp<SkImageFilter> tile_factory(sk_sp<SkImage> auxImage, const SkIRect* cropRect) {
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// Tile the subset over a large region
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return SkImageFilters::Tile(SkRect::MakeLTRB(25, 25, 75, 75), SkRect::MakeWH(100, 100),
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nullptr);
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}
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namespace {
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enum class Strategy {
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// Uses makeWithFilter, passing in subset and clip directly
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kMakeWithFilter,
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// Uses saveLayer after clipRect() to filter on the restore (i.e. reference image)
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kSaveLayer
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};
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} // namespace
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// In this GM, we're going to feed the inner portion of a 100x100 mandrill (i.e., strip off a
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// 25-wide border) through the makeWithFilter method. We'll then draw the appropriate subset of the
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// result to the screen at the given offset. Some filters rely on a secondary image, which will be a
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// 100x100 checkerboard. The original image is drawn in the background so that alignment is clear
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// when drawing the result at its reported offset.
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class ImageMakeWithFilterGM : public skiagm::GM {
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public:
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ImageMakeWithFilterGM (Strategy strategy, bool filterWithCropRect = false)
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: fStrategy(strategy)
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, fFilterWithCropRect(filterWithCropRect)
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, fMainImage(nullptr)
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, fAuxImage(nullptr) {}
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protected:
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SkString onShortName() override {
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SkString name = SkString("imagemakewithfilter");
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if (fFilterWithCropRect) {
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name.append("_crop");
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}
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if (fStrategy == Strategy::kSaveLayer) {
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name.append("_ref");
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}
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return name;
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}
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SkISize onISize() override { return SkISize::Make(1980, 860); }
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void onOnceBeforeDraw() override {
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SkImageInfo info = SkImageInfo::MakeN32(100, 100, kUnpremul_SkAlphaType);
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auto surface = SkSurface::MakeRaster(info, nullptr);
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sk_sp<SkImage> colorImage = GetResourceAsImage("images/mandrill_128.png");
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// Resize to 100x100
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surface->getCanvas()->drawImageRect(
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colorImage, SkRect::MakeWH(colorImage->width(), colorImage->height()),
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SkRect::MakeWH(info.width(), info.height()), SkSamplingOptions(), nullptr,
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SkCanvas::kStrict_SrcRectConstraint);
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fMainImage = surface->makeImageSnapshot();
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ToolUtils::draw_checkerboard(surface->getCanvas());
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fAuxImage = surface->makeImageSnapshot();
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}
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DrawResult onDraw(SkCanvas* canvas, SkString* errorMsg) override {
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FilterFactory filters[] = {
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color_filter_factory,
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blur_filter_factory,
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drop_shadow_factory,
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offset_factory,
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dilate_factory,
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erode_factory,
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displacement_factory,
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arithmetic_factory,
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blend_factory,
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convolution_factory,
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matrix_factory,
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alpha_threshold_factory,
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lighting_factory,
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tile_factory
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};
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const char* filterNames[] = {
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"Color",
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"Blur",
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"Drop Shadow",
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"Offset",
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"Dilate",
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"Erode",
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"Displacement",
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"Arithmetic",
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"Xfer Mode", // "blend"
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"Convolution",
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"Matrix Xform",
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"Alpha Threshold",
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"Lighting",
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"Tile"
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};
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static_assert(SK_ARRAY_COUNT(filters) == SK_ARRAY_COUNT(filterNames), "filter name length");
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SkIRect clipBounds[] {
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{ -20, -20, 100, 100 },
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{ 0, 0, 75, 75 },
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{ 20, 20, 100, 100 },
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{ -20, -20, 50, 50 },
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{ 20, 20, 50, 50 },
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{ 30, 30, 75, 75 }
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};
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auto rContext = canvas->recordingContext();
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// In a DDL context, we can't use the GPU code paths and we will drop the work – skip.
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auto dContext = GrAsDirectContext(rContext);
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if (rContext) {
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if (!dContext) {
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*errorMsg = "Requires a direct context.";
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return DrawResult::kSkip;
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}
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if (dContext->abandoned()) {
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*errorMsg = "Direct context abandoned.";
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return DrawResult::kSkip;
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}
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}
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// These need to be GPU-backed when on the GPU to ensure that the image filters use the GPU
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// code paths (otherwise they may choose to do CPU filtering then upload)
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sk_sp<SkImage> mainImage = ToolUtils::MakeTextureImage(canvas, fMainImage);
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sk_sp<SkImage> auxImage = ToolUtils::MakeTextureImage(canvas, fAuxImage);
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if (!mainImage || !auxImage) {
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return DrawResult::kFail;
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}
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SkASSERT(mainImage && (mainImage->isTextureBacked() || !dContext));
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SkASSERT(auxImage && (auxImage->isTextureBacked() || !dContext));
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SkScalar MARGIN = SkIntToScalar(40);
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SkScalar DX = mainImage->width() + MARGIN;
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SkScalar DY = auxImage->height() + MARGIN;
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// Header hinting at what the filters do
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SkPaint textPaint;
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textPaint.setAntiAlias(true);
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SkFont font(nullptr, 12);
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for (size_t i = 0; i < SK_ARRAY_COUNT(filterNames); ++i) {
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canvas->drawString(filterNames[i], DX * i + MARGIN, 15, font, textPaint);
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}
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canvas->translate(MARGIN, MARGIN);
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for (auto clipBound : clipBounds) {
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canvas->save();
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for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
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SkIRect subset = SkIRect::MakeXYWH(25, 25, 50, 50);
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SkIRect outSubset;
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// Draw the original image faintly so that it aids in checking alignment of the
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// filtered result.
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SkPaint alpha;
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alpha.setAlphaf(0.3f);
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canvas->drawImage(mainImage, 0, 0, SkSamplingOptions(), &alpha);
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this->drawImageWithFilter(canvas, mainImage, auxImage, filters[i], clipBound,
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subset, &outSubset);
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// Draw outlines to highlight what was subset, what was cropped, and what was output
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// (no output subset is displayed for kSaveLayer since that information isn't avail)
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SkIRect* outSubsetBounds = nullptr;
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if (fStrategy != Strategy::kSaveLayer) {
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outSubsetBounds = &outSubset;
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}
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show_bounds(canvas, &clipBound, &subset, outSubsetBounds);
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canvas->translate(DX, 0);
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}
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canvas->restore();
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canvas->translate(0, DY);
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}
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return DrawResult::kOk;
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}
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private:
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Strategy fStrategy;
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bool fFilterWithCropRect;
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sk_sp<SkImage> fMainImage;
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sk_sp<SkImage> fAuxImage;
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void drawImageWithFilter(SkCanvas* canvas, sk_sp<SkImage> mainImage, sk_sp<SkImage> auxImage,
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FilterFactory filterFactory, const SkIRect& clip,
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const SkIRect& subset, SkIRect* dstRect) {
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// When creating the filter with a crop rect equal to the clip, we should expect to see no
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// difference from a filter without a crop rect. However, if the CTM isn't managed properly
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// by makeWithFilter, then the final result will be the incorrect intersection of the clip
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// and the transformed crop rect.
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sk_sp<SkImageFilter> filter = filterFactory(auxImage,
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fFilterWithCropRect ? &clip : nullptr);
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if (fStrategy == Strategy::kSaveLayer) {
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SkAutoCanvasRestore acr(canvas, true);
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// Clip before the saveLayer with the filter
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canvas->clipRect(SkRect::Make(clip));
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// Put the image filter on the layer
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SkPaint paint;
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paint.setImageFilter(filter);
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canvas->saveLayer(nullptr, &paint);
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// Draw the original subset of the image
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SkRect r = SkRect::Make(subset);
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canvas->drawImageRect(mainImage, r, r, SkSamplingOptions(),
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nullptr, SkCanvas::kStrict_SrcRectConstraint);
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*dstRect = subset;
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} else {
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sk_sp<SkImage> result;
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SkIRect outSubset;
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SkIPoint offset;
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auto rContext = canvas->recordingContext();
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result = mainImage->makeWithFilter(rContext, filter.get(), subset, clip,
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&outSubset, &offset);
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if (!result) {
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return;
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}
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SkASSERT(mainImage->isTextureBacked() == result->isTextureBacked());
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*dstRect = SkIRect::MakeXYWH(offset.x(), offset.y(),
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outSubset.width(), outSubset.height());
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canvas->drawImageRect(result, SkRect::Make(outSubset), SkRect::Make(*dstRect),
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SkSamplingOptions(), nullptr,
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SkCanvas::kStrict_SrcRectConstraint);
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}
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}
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using INHERITED = GM;
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};
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// The different strategies should all look the same, with the exception of filters that affect
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// transparent black (i.e. the lighting filter). In the save layer case, the filter affects the
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// transparent pixels outside of the drawn subset, whereas the makeWithFilter is restricted. This
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// works as intended.
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DEF_GM( return new ImageMakeWithFilterGM(Strategy::kMakeWithFilter); )
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DEF_GM( return new ImageMakeWithFilterGM(Strategy::kSaveLayer); )
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// Test with crop rects on the image filters; should look identical to above if working correctly
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DEF_GM( return new ImageMakeWithFilterGM(Strategy::kMakeWithFilter, true); )
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DEF_GM( return new ImageMakeWithFilterGM(Strategy::kSaveLayer, true); )
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