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skia2/gm/filterfastbounds.cpp
Michael Ludwig 898bbfac2e Update gms to use new image filter factories 
Bug: skia:9280
Change-Id: Ic7ca3a9c86025128bc45b89ea90aa4553287b8c9
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/230879
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
2019-08-02 21:08:40 +00:00

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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/gm.h"
#include "include/core/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkFilterQuality.h"
#include "include/core/SkImage.h"
#include "include/core/SkImageFilter.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPath.h"
#include "include/core/SkPicture.h"
#include "include/core/SkPictureRecorder.h"
#include "include/core/SkPoint.h"
#include "include/core/SkRRect.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkSurface.h"
#include "include/core/SkTypes.h"
#include "include/effects/SkImageFilters.h"
#include "include/private/SkTArray.h"
#include <utility>
namespace skiagm {
// Each method of this type must draw its geometry inside 'r' using 'p'
typedef void(*drawMth)(SkCanvas* canvas, const SkRect& r, const SkPaint& p);
static void draw_rect(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
canvas->drawRect(r, p);
}
static void draw_oval(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
canvas->drawOval(r, p);
}
static void draw_rrect(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
SkScalar xRad = r.width() / 4.0f;
SkScalar yRad = r.height() / 4.0f;
SkRRect rr;
rr.setRectXY(r, xRad, yRad);
canvas->drawRRect(rr, p);
}
static void draw_drrect(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
SkScalar xRad = r.width() / 4.0f;
SkScalar yRad = r.height() / 4.0f;
SkRRect outer;
outer.setRectXY(r, xRad, yRad);
SkRRect inner = outer;
inner.inset(xRad, yRad);
canvas->drawDRRect(outer, inner, p);
}
static void draw_path(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
SkPath path;
path.moveTo(r.fLeft, r.fTop);
path.lineTo(r.fLeft, r.fBottom);
path.lineTo(r.fRight, r.fBottom);
path.close();
canvas->drawPath(path, p);
}
static void draw_points(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
SkPoint pts0[2] = { { r.fLeft, r.fTop }, { r.fRight, r.fBottom } };
SkPoint pts1[2] = { { r.fLeft, r.fBottom }, { r.fRight, r.fTop } };
canvas->drawPoints(SkCanvas::kLines_PointMode, 2, pts0, p);
canvas->drawPoints(SkCanvas::kLines_PointMode, 2, pts1, p);
}
static void draw_bitmap(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
SkBitmap bm;
bm.allocN32Pixels(64, 64);
SkCanvas temp(bm);
temp.clear(SK_ColorMAGENTA);
canvas->drawBitmapRect(bm, r, &p);
}
constexpr drawMth gDrawMthds[] = {
draw_rect, draw_oval, draw_rrect, draw_drrect, draw_path, draw_points, draw_bitmap
};
static void add_paint(SkTArray<SkPaint>* paints, sk_sp<SkImageFilter> filter) {
SkPaint& p = paints->push_back();
p.setImageFilter(std::move(filter));
SkASSERT(p.canComputeFastBounds());
}
// Create a selection of imagefilter-based paints to test
static void create_paints(SkTArray<SkPaint>* paints, sk_sp<SkImageFilter> source) {
{
SkMatrix scale;
scale.setScale(2.0f, 2.0f);
sk_sp<SkImageFilter> scaleMIF(
SkImageFilters::MatrixTransform(scale, kLow_SkFilterQuality, source));
add_paint(paints, std::move(scaleMIF));
}
{
SkMatrix rot;
rot.setRotate(-33.3f);
sk_sp<SkImageFilter> rotMIF(
SkImageFilters::MatrixTransform(rot, kLow_SkFilterQuality, source));
add_paint(paints, std::move(rotMIF));
}
{
SkRect src = SkRect::MakeXYWH(20, 20, 10, 10);
SkRect dst = SkRect::MakeXYWH(30, 30, 30, 30);
sk_sp<SkImageFilter> tileIF(SkImageFilters::Tile(src, dst, nullptr));
add_paint(paints, std::move(tileIF));
}
{
sk_sp<SkImageFilter> dsif =
SkImageFilters::DropShadow(10.0f, 10.0f, 3.0f, 3.0f, SK_ColorRED, source);
add_paint(paints, std::move(dsif));
}
{
sk_sp<SkImageFilter> dsif =
SkImageFilters::DropShadowOnly(27.0f, 27.0f, 3.0f, 3.0f, SK_ColorRED, source);
add_paint(paints, std::move(dsif));
}
add_paint(paints, SkImageFilters::Blur(3, 3, source));
add_paint(paints, SkImageFilters::Offset(15, 15, source));
}
// This GM visualizes the fast bounds for various combinations of geometry
// and image filter
class ImageFilterFastBoundGM : public GM {
public:
ImageFilterFastBoundGM() {
this->setBGColor(0xFFCCCCCC);
}
protected:
static constexpr int kTileWidth = 100;
static constexpr int kTileHeight = 100;
static constexpr int kNumVertTiles = 7;
static constexpr int kNumXtraCols = 2;
SkString onShortName() override { return SkString("filterfastbounds"); }
SkISize onISize() override {
return SkISize::Make((SK_ARRAY_COUNT(gDrawMthds) + kNumXtraCols) * kTileWidth,
kNumVertTiles * kTileHeight);
}
static void draw_geom_with_paint(drawMth draw, const SkIPoint& off,
SkCanvas* canvas, const SkPaint& p) {
SkPaint redStroked;
redStroked.setColor(SK_ColorRED);
redStroked.setStyle(SkPaint::kStroke_Style);
SkPaint blueStroked;
blueStroked.setColor(SK_ColorBLUE);
blueStroked.setStyle(SkPaint::kStroke_Style);
const SkRect r = SkRect::MakeLTRB(20, 20, 30, 30);
SkRect storage;
canvas->save();
canvas->translate(SkIntToScalar(off.fX), SkIntToScalar(off.fY));
canvas->scale(1.5f, 1.5f);
const SkRect& fastBound = p.computeFastBounds(r, &storage);
canvas->save();
canvas->clipRect(fastBound);
(*draw)(canvas, r, p);
canvas->restore();
canvas->drawRect(r, redStroked);
canvas->drawRect(fastBound, blueStroked);
canvas->restore();
}
static void draw_savelayer_with_paint(const SkIPoint& off,
SkCanvas* canvas,
const SkPaint& p) {
SkPaint redStroked;
redStroked.setColor(SK_ColorRED);
redStroked.setStyle(SkPaint::kStroke_Style);
SkPaint blueStroked;
blueStroked.setColor(SK_ColorBLUE);
blueStroked.setStyle(SkPaint::kStroke_Style);
const SkRect bounds = SkRect::MakeWH(10, 10);
SkRect storage;
canvas->save();
canvas->translate(30, 30);
canvas->translate(SkIntToScalar(off.fX), SkIntToScalar(off.fY));
canvas->scale(1.5f, 1.5f);
const SkRect& fastBound = p.computeFastBounds(bounds, &storage);
canvas->saveLayer(&fastBound, &p);
canvas->restore();
canvas->drawRect(bounds, redStroked);
canvas->drawRect(fastBound, blueStroked);
canvas->restore();
}
void onDraw(SkCanvas* canvas) override {
SkPaint blackFill;
//-----------
// Normal paints (no source)
SkTArray<SkPaint> paints;
create_paints(&paints, nullptr);
//-----------
// Paints with a PictureImageFilter as a source
sk_sp<SkPicture> pic;
{
SkPictureRecorder rec;
SkCanvas* c = rec.beginRecording(10, 10);
c->drawRect(SkRect::MakeWH(10, 10), blackFill);
pic = rec.finishRecordingAsPicture();
}
SkTArray<SkPaint> pifPaints;
create_paints(&pifPaints, SkImageFilters::Picture(pic));
//-----------
// Paints with a SkImageSource as a source
auto surface(SkSurface::MakeRasterN32Premul(10, 10));
{
SkPaint p;
SkCanvas* temp = surface->getCanvas();
temp->clear(SK_ColorYELLOW);
p.setColor(SK_ColorBLUE);
temp->drawRect(SkRect::MakeLTRB(5, 5, 10, 10), p);
p.setColor(SK_ColorGREEN);
temp->drawRect(SkRect::MakeLTRB(5, 0, 10, 5), p);
}
sk_sp<SkImage> image(surface->makeImageSnapshot());
sk_sp<SkImageFilter> imageSource(SkImageFilters::Image(std::move(image)));
SkTArray<SkPaint> bmsPaints;
create_paints(&bmsPaints, std::move(imageSource));
//-----------
SkASSERT(paints.count() == kNumVertTiles);
SkASSERT(paints.count() == pifPaints.count());
SkASSERT(paints.count() == bmsPaints.count());
// horizontal separators
for (int i = 1; i < paints.count(); ++i) {
canvas->drawLine(0,
i*SkIntToScalar(kTileHeight),
SkIntToScalar((SK_ARRAY_COUNT(gDrawMthds) + kNumXtraCols)*kTileWidth),
i*SkIntToScalar(kTileHeight),
blackFill);
}
// vertical separators
for (int i = 0; i < (int)SK_ARRAY_COUNT(gDrawMthds) + kNumXtraCols; ++i) {
canvas->drawLine(SkIntToScalar(i * kTileWidth),
0,
SkIntToScalar(i * kTileWidth),
SkIntToScalar(paints.count() * kTileWidth),
blackFill);
}
// A column of saveLayers with PictureImageFilters
for (int i = 0; i < pifPaints.count(); ++i) {
draw_savelayer_with_paint(SkIPoint::Make(0, i*kTileHeight),
canvas, pifPaints[i]);
}
// A column of saveLayers with BitmapSources
for (int i = 0; i < pifPaints.count(); ++i) {
draw_savelayer_with_paint(SkIPoint::Make(kTileWidth, i*kTileHeight),
canvas, bmsPaints[i]);
}
// Multiple columns with different geometry
for (int i = 0; i < (int)SK_ARRAY_COUNT(gDrawMthds); ++i) {
for (int j = 0; j < paints.count(); ++j) {
draw_geom_with_paint(*gDrawMthds[i],
SkIPoint::Make((i+kNumXtraCols) * kTileWidth, j*kTileHeight),
canvas, paints[j]);
}
}
}
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new ImageFilterFastBoundGM;)
}
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