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/*
* Copyright 2015 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 "SkBlurImageFilter.h"
#include "SkColorMatrixFilter.h"
#include "SkImage.h"
#include "SkImageFilter.h"
#include "SkSurface.h"
#include "sk_tool_utils.h"
/**
* Test drawing a primitive w/ an imagefilter (in this case, just matrix w/ identity) to see
* that we apply the xfermode *after* the image has been created and filtered, and not during
* the creation step (i.e. before it is filtered).
*
* see https://bug.skia.org/3741
*/
static void do_draw(SkCanvas* canvas, SkBlendMode mode, sk_sp<SkImageFilter> imf) {
SkAutoCanvasRestore acr(canvas, true);
canvas->clipRect(SkRect::MakeWH(220, 220));
// want to force a layer, so modes like DstIn can combine meaningfully, but the final
// image can still be shown against our default (opaque) background. non-opaque GMs
// are a lot more trouble to compare/triage.
canvas->saveLayer(nullptr, nullptr);
canvas->drawColor(SK_ColorGREEN);
SkPaint paint;
paint.setAntiAlias(true);
SkRect r0 = SkRect::MakeXYWH(10, 60, 200, 100);
SkRect r1 = SkRect::MakeXYWH(60, 10, 100, 200);
paint.setColor(SK_ColorRED);
canvas->drawOval(r0, paint);
paint.setColor(0x660000FF);
paint.setImageFilter(std::move(imf));
paint.setBlendMode(mode);
canvas->drawOval(r1, paint);
}
DEF_SIMPLE_GM(imagefilters_xfermodes, canvas, 480, 480) {
canvas->translate(10, 10);
// just need an imagefilter to trigger the code-path (which creates a tmp layer)
sk_sp<SkImageFilter> imf(SkImageFilter::MakeMatrixFilter(SkMatrix::I(),
kNone_SkFilterQuality,
nullptr));
const SkBlendMode modes[] = {
SkBlendMode::kSrcATop, SkBlendMode::kDstIn
};
for (size_t i = 0; i < SK_ARRAY_COUNT(modes); ++i) {
canvas->save();
do_draw(canvas, modes[i], nullptr);
canvas->translate(240, 0);
do_draw(canvas, modes[i], imf);
canvas->restore();
canvas->translate(0, 240);
}
}
static sk_sp<SkImage> make_image(SkCanvas* canvas) {
const SkImageInfo info = SkImageInfo::MakeS32(100, 100, kPremul_SkAlphaType);
auto surface(sk_tool_utils::makeSurface(canvas, info));
surface->getCanvas()->drawRect(SkRect::MakeXYWH(25, 25, 50, 50), SkPaint());
return surface->makeImageSnapshot();
}
// Compare blurs when we're tightly clipped (fast) and not as tightly (slower)
//
// Expect the two to draw the same (modulo the extra border of pixels when the clip is larger)
//
DEF_SIMPLE_GM(fast_slow_blurimagefilter, canvas, 620, 260) {
sk_sp<SkImage> image(make_image(canvas));
const SkRect r = SkRect::MakeIWH(image->width(), image->height());
canvas->translate(10, 10);
for (SkScalar sigma = 8; sigma <= 128; sigma *= 2) {
SkPaint paint;
paint.setImageFilter(SkBlurImageFilter::Make(sigma, sigma, nullptr));
canvas->save();
// we outset the clip by 1, to fall out of the fast-case in drawImage
// i.e. the clip is larger than the image
for (SkScalar outset = 0; outset <= 1; ++outset) {
canvas->save();
canvas->clipRect(r.makeOutset(outset, outset));
canvas->drawImage(image, 0, 0, &paint);
canvas->restore();
canvas->translate(0, r.height() + 20);
}
canvas->restore();
canvas->translate(r.width() + 20, 0);
}
}
///////////////////////////////////////////////////////////////////////////////////////////////////
#include "Resources.h"
#include "SkBlurImageFilter.h"
#include "SkMatrixConvolutionImageFilter.h"
#include "SkMorphologyImageFilter.h"
#include "SkColorMatrixFilter.h"
#include "SkColorFilterImageFilter.h"
#include "SkRRect.h"
static void draw_set(SkCanvas* canvas, sk_sp<SkImageFilter> filters[], int count) {
const SkRect r = SkRect::MakeXYWH(30, 30, 200, 200);
const SkScalar offset = 250;
SkScalar dx = 0, dy = 0;
for (int i = 0; i < count; ++i) {
canvas->save();
SkRRect rr = SkRRect::MakeRectXY(r.makeOffset(dx, dy), 20, 20);
canvas->clipRRect(rr, true);
canvas->saveLayer({ &rr.getBounds(), nullptr, filters[i].get(), nullptr, nullptr, 0 });
canvas->drawColor(0x40FFFFFF);
canvas->restore();
canvas->restore();
if (0 == dx) {
dx = offset;
} else {
dx = 0;
dy = offset;
}
}
}
DEF_SIMPLE_GM(savelayer_with_backdrop, canvas, 830, 550) {
SkColorMatrix cm;
cm.setSaturation(10);
sk_sp<SkColorFilter> cf(SkColorFilter::MakeMatrixFilterRowMajor255(cm.fMat));
const SkScalar kernel[] = { 4, 0, 4, 0, -15, 0, 4, 0, 4 };
sk_sp<SkImageFilter> filters[] = {
SkBlurImageFilter::Make(10, 10, nullptr),
SkDilateImageFilter::Make(8, 8, nullptr),
SkMatrixConvolutionImageFilter::Make(
{ 3, 3 }, kernel, 1, 0, { 0, 0 },
SkMatrixConvolutionImageFilter::kClampToBlack_TileMode,
true, nullptr),
SkColorFilterImageFilter::Make(std::move(cf), nullptr),
};
const struct {
SkScalar fSx, fSy, fTx, fTy;
} xforms[] = {
{ 1, 1, 0, 0 },
{ 0.5f, 0.5f, 530, 0 },
{ 0.25f, 0.25f, 530, 275 },
{ 0.125f, 0.125f, 530, 420 },
};
SkPaint paint;
paint.setFilterQuality(kMedium_SkFilterQuality);
sk_sp<SkImage> image(GetResourceAsImage("images/mandrill_512.png"));
canvas->translate(20, 20);
for (const auto& xform : xforms) {
canvas->save();
canvas->translate(xform.fTx, xform.fTy);
canvas->scale(xform.fSx, xform.fSy);
canvas->drawImage(image, 0, 0, &paint);
draw_set(canvas, filters, SK_ARRAY_COUNT(filters));
canvas->restore();
}
}
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