blob: 21d4ff081a3cc82c4dbf0c14552b576f012725fa [file] [log] [blame]
/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm/gm.h"
#include "include/core/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkImage.h"
#include "include/core/SkImageFilter.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPoint.h"
#include "include/core/SkPoint3.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkShader.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkSurface.h"
#include "include/core/SkTileMode.h"
#include "include/core/SkTypes.h"
#include "include/effects/SkGradientShader.h"
#include "include/effects/SkImageFilters.h"
#include "include/effects/SkPerlinNoiseShader.h"
#include "tools/DecodeUtils.h"
#include "tools/ToolUtils.h"
#include <utility>
#define RESIZE_FACTOR_X SkIntToScalar(2)
#define RESIZE_FACTOR_Y SkIntToScalar(5)
static sk_sp<SkImage> make_gradient_circle(int width, int height) {
SkScalar x = SkIntToScalar(width / 2);
SkScalar y = SkIntToScalar(height / 2);
SkScalar radius = std::min(x, y) * 0.8f;
auto surface(SkSurfaces::Raster(SkImageInfo::MakeN32Premul(width, height)));
SkCanvas* canvas = surface->getCanvas();
canvas->clear(0x00000000);
SkColor colors[2];
colors[0] = SK_ColorWHITE;
colors[1] = SK_ColorBLACK;
SkPaint paint;
paint.setShader(SkGradientShader::MakeRadial(SkPoint::Make(x, y), radius, colors, nullptr,
2, SkTileMode::kClamp));
canvas->drawCircle(x, y, radius, paint);
return surface->makeImageSnapshot();
}
static void draw_clipped_filter(SkCanvas* canvas, sk_sp<SkImageFilter> filter, size_t i,
const SkRect& primBounds, const SkRect& clipBounds) {
SkPaint paint;
paint.setColor(SK_ColorWHITE);
paint.setImageFilter(std::move(filter));
paint.setAntiAlias(true);
canvas->save();
canvas->clipRect(clipBounds);
if (5 == i) {
canvas->translate(SkIntToScalar(16), SkIntToScalar(-32));
} else if (6 == i) {
canvas->scale(SkScalarInvert(RESIZE_FACTOR_X), SkScalarInvert(RESIZE_FACTOR_Y));
}
canvas->drawCircle(primBounds.centerX(), primBounds.centerY(),
primBounds.width() * 2 / 5, paint);
canvas->restore();
}
namespace skiagm {
class ImageFiltersClippedGM : public GM {
public:
ImageFiltersClippedGM() {
this->setBGColor(0x00000000);
}
protected:
SkString getName() const override { return SkString("imagefiltersclipped"); }
SkISize getISize() override { return SkISize::Make(860, 500); }
void onOnceBeforeDraw() override {
fCheckerboard =
ToolUtils::create_checkerboard_image(64, 64, 0xFFA0A0A0, 0xFF404040, 8);
fGradientCircle = make_gradient_circle(64, 64);
}
void onDraw(SkCanvas* canvas) override {
canvas->clear(SK_ColorBLACK);
sk_sp<SkImageFilter> gradient(SkImageFilters::Image(fGradientCircle,
SkFilterMode::kLinear));
sk_sp<SkImageFilter> checkerboard(SkImageFilters::Image(fCheckerboard,
SkFilterMode::kLinear));
SkMatrix resizeMatrix;
resizeMatrix.setScale(RESIZE_FACTOR_X, RESIZE_FACTOR_Y);
SkPoint3 pointLocation = SkPoint3::Make(32, 32, SkIntToScalar(10));
SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
sk_sp<SkImageFilter> filters[] = {
SkImageFilters::Blur(SkIntToScalar(12), SkIntToScalar(12), nullptr),
SkImageFilters::DropShadow(SkIntToScalar(10), SkIntToScalar(10),
SkIntToScalar(3), SkIntToScalar(3), SK_ColorGREEN, nullptr),
SkImageFilters::DisplacementMap(SkColorChannel::kR, SkColorChannel::kR,
SkIntToScalar(12), std::move(gradient), checkerboard),
SkImageFilters::Dilate(2, 2, checkerboard),
SkImageFilters::Erode(2, 2, checkerboard),
SkImageFilters::Offset(SkIntToScalar(-16), SkIntToScalar(32), nullptr),
SkImageFilters::MatrixTransform(resizeMatrix, SkSamplingOptions(), nullptr),
// Crop output of lighting to the checkerboard
SkImageFilters::PointLitDiffuse(pointLocation, SK_ColorWHITE, SK_Scalar1,
SkIntToScalar(2), checkerboard, r),
};
SkScalar margin = SkIntToScalar(16);
SkRect bounds = r;
bounds.outset(margin, margin);
canvas->save();
for (int xOffset = 0; xOffset < 80; xOffset += 16) {
canvas->save();
bounds.fLeft = SkIntToScalar(xOffset);
for (size_t i = 0; i < std::size(filters); ++i) {
draw_clipped_filter(canvas, filters[i], i, r, bounds);
canvas->translate(r.width() + margin, 0);
}
canvas->restore();
canvas->translate(0, r.height() + margin);
}
canvas->restore();
sk_sp<SkImageFilter> rectFilter(
SkImageFilters::Shader(SkShaders::MakeFractalNoise(0.1f, 0.05f, 1, 0)));
canvas->translate(std::size(filters)*(r.width() + margin), 0);
for (int xOffset = 0; xOffset < 80; xOffset += 16) {
bounds.fLeft = SkIntToScalar(xOffset);
draw_clipped_filter(canvas, rectFilter, 0, r, bounds);
canvas->translate(0, r.height() + margin);
}
}
private:
sk_sp<SkImage> fCheckerboard, fGradientCircle;
using INHERITED = GM;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new ImageFiltersClippedGM;)
} // namespace skiagm
DEF_SIMPLE_GM(imagefilter_convolve_subset, canvas, 160, 180) {
sk_sp<SkImage> reference = ToolUtils::GetResourceAsImage("images/filter_reference.png");
SkRect crop = SkRect::Make(reference->dimensions()).makeInset(10, 10);
auto drawFilteredImage = [&](sk_sp<SkImageFilter> filter) {
SkPaint p;
p.setImageFilter(std::move(filter));
canvas->drawImage(reference, 0, 0, {}, &p);
canvas->translate(0, reference->height());
};
{
float kernel[] = {1.f, 1.f, 1.f,
1.f, -7.f, 1.f,
1.f, 1.f, 1.f};
drawFilteredImage(SkImageFilters::MatrixConvolution(
{3, 3}, kernel, 1.f, 0.3f, {1, 1}, SkTileMode::kClamp, true, nullptr, crop));
}
drawFilteredImage(SkImageFilters::Blur(10.f, 10.f, SkTileMode::kMirror, nullptr, crop));
}