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/*
* 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.h"
#include "sk_tool_utils.h"
#include "SkCanvas.h"
#include "SkColorFilter.h"
#include "SkColorPriv.h"
#include "SkShader.h"
#include "SkBlurImageFilter.h"
#include "SkColorMatrixFilter.h"
#include "SkDisplacementMapEffect.h"
#include "SkDropShadowImageFilter.h"
#include "SkGradientShader.h"
#include "SkImageSource.h"
#include "SkMorphologyImageFilter.h"
#include "SkColorFilterImageFilter.h"
#include "SkLightingImageFilter.h"
#include "SkMergeImageFilter.h"
#include "SkOffsetImageFilter.h"
#include "SkPoint3.h"
#include "SkSurface.h"
namespace {
void make_checkerboard(SkBitmap* bitmap);
sk_sp<SkImage> make_gradient_circle(int width, int height);
void draw(SkCanvas* canvas, const SkBitmap& bitmap, const SkRect& rect,
sk_sp<SkImageFilter> filter);
};
///////////////////////////////////////////////////////////////////////////////
DEF_SIMPLE_GM(imagefilterscropexpand, canvas, 730, 650) {
SkImageFilter::CropRect cropRect(
SkRect::Make(SkIRect::MakeXYWH(10, 10, 44, 44)),
SkImageFilter::CropRect::kHasAll_CropEdge);
sk_sp<SkImage> gradientCircle(make_gradient_circle(64, 64));
SkBitmap checkerboard;
make_checkerboard(&checkerboard);
sk_sp<SkImageFilter> gradientCircleSource(SkImageSource::Make(std::move(gradientCircle)));
sk_sp<SkImageFilter> noopCropped(SkOffsetImageFilter::Make(0, 0, nullptr, &cropRect));
// This color matrix saturates the green component but only partly increases the opacity.
// For the opaque checkerboard, the opacity boost doesn't matter but it does impact the
// area outside the checkerboard.
SkScalar matrix[20] = { 1, 0, 0, 0, 0,
0, 1, 0, 0, 255,
0, 0, 1, 0, 0,
0, 0, 0, 1, 32 };
sk_sp<SkColorFilter> cfAlphaTrans(SkColorFilter::MakeMatrixFilterRowMajor255(matrix));
SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
SkScalar MARGIN = SkIntToScalar(12);
SkPoint3 pointLocation = SkPoint3::Make(0, 0, SkIntToScalar(10));
SkScalar kd = SkIntToScalar(2);
SkScalar surfaceScale = SkIntToScalar(1);
SkIRect bounds;
r.roundOut(&bounds);
SkPaint paint;
canvas->translate(MARGIN, MARGIN);
for (int outset = -15; outset <= 20; outset += 5) {
canvas->save();
SkRect rect = cropRect.rect();
rect.outset(SkIntToScalar(outset),
SkIntToScalar(outset));
SkImageFilter::CropRect bigRect(rect, SkImageFilter::CropRect::kHasAll_CropEdge);
draw(canvas, checkerboard, rect, SkColorFilterImageFilter::Make(cfAlphaTrans,
noopCropped,
&bigRect));
draw(canvas, checkerboard, rect, SkBlurImageFilter::Make(0.3f, 0.3f,
noopCropped,
&bigRect));
draw(canvas, checkerboard, rect, SkBlurImageFilter::Make(8.0f, 8.0f,
noopCropped,
&bigRect));
draw(canvas, checkerboard, rect, SkDilateImageFilter::Make(2, 2,
noopCropped,
&bigRect));
draw(canvas, checkerboard, rect, SkErodeImageFilter::Make(2, 2,
noopCropped,
&bigRect));
draw(canvas, checkerboard, rect,
SkDropShadowImageFilter::Make(
SkIntToScalar(10),
SkIntToScalar(10),
SkIntToScalar(3),
SkIntToScalar(3),
SK_ColorBLUE,
SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode,
noopCropped,
&bigRect));
draw(canvas, checkerboard, rect,
SkDisplacementMapEffect::Make(SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kR_ChannelSelectorType,
SkIntToScalar(12),
gradientCircleSource,
noopCropped,
&bigRect));
draw(canvas, checkerboard, rect,
SkOffsetImageFilter::Make(SkIntToScalar(-8), SkIntToScalar(16),
noopCropped,
&bigRect));
draw(canvas, checkerboard, rect,
SkLightingImageFilter::MakePointLitDiffuse(pointLocation,
SK_ColorWHITE,
surfaceScale,
kd,
noopCropped,
&bigRect));
canvas->restore();
canvas->translate(0, SkIntToScalar(80));
}
}
namespace {
void make_checkerboard(SkBitmap* bitmap) {
bitmap->allocN32Pixels(64, 64);
SkCanvas canvas(*bitmap);
canvas.clear(0xFFFF0000);
SkPaint darkPaint;
darkPaint.setColor(sk_tool_utils::color_to_565(0xFF404040));
SkPaint lightPaint;
lightPaint.setColor(sk_tool_utils::color_to_565(0xFFA0A0A0));
for (int y = 8; y < 48; y += 16) {
for (int x = 8; x < 48; x += 16) {
canvas.save();
canvas.translate(SkIntToScalar(x), SkIntToScalar(y));
canvas.drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint);
canvas.drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint);
canvas.drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint);
canvas.drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint);
canvas.restore();
}
}
}
sk_sp<SkImage> make_gradient_circle(int width, int height) {
SkScalar x = SkIntToScalar(width / 2);
SkScalar y = SkIntToScalar(height / 2);
SkScalar radius = SkMinScalar(x, y) * 0.8f;
auto surface(SkSurface::MakeRasterN32Premul(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, SkShader::kClamp_TileMode));
canvas->drawCircle(x, y, radius, paint);
return surface->makeImageSnapshot();
}
void draw(SkCanvas* canvas, const SkBitmap& bitmap, const SkRect& rect,
sk_sp<SkImageFilter> filter) {
SkPaint paint;
paint.setImageFilter(std::move(filter));
canvas->saveLayer(&rect, &paint);
canvas->drawBitmap(bitmap, 0, 0);
canvas->restore();
SkPaint strokePaint;
strokePaint.setColor(0xFFFF0000);
strokePaint.setStyle(SkPaint::kStroke_Style);
canvas->drawRect(rect, strokePaint);
canvas->translate(SkIntToScalar(80), 0);
}
};
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