143 lines
4.8 KiB
C++
143 lines
4.8 KiB
C++
/*
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* Copyright 2017 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/SkBitmap.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/SkColorPriv.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/SkRect.h"
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#include "include/core/SkRefCnt.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/GrTypes.h"
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#include <utility>
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static sk_sp<SkImage> make_image(GrRecordingContext* context, int size, GrSurfaceOrigin origin) {
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if (context) {
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SkImageInfo ii = SkImageInfo::Make(size, size, kN32_SkColorType, kPremul_SkAlphaType);
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sk_sp<SkSurface> surf(SkSurface::MakeRenderTarget(context, SkBudgeted::kYes, ii, 0,
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origin, nullptr));
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if (surf) {
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SkCanvas* canvas = surf->getCanvas();
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canvas->clear(SK_ColorRED);
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const struct {
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SkPoint fPt;
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SkColor fColor;
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} rec[] = {
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{ { 1.5f, 1.5f }, SK_ColorGREEN },
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{ { 2.5f, 1.5f }, SK_ColorBLUE },
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{ { 1.5f, 2.5f }, SK_ColorCYAN },
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{ { 2.5f, 2.5f }, SK_ColorGRAY },
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};
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SkPaint paint;
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for (const auto& r : rec) {
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paint.setColor(r.fColor);
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canvas->drawPoints(SkCanvas::kPoints_PointMode, 1, &r.fPt, paint);
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}
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return surf->makeImageSnapshot();
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}
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}
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SkBitmap bm;
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bm.allocN32Pixels(size, size);
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bm.eraseColor(SK_ColorRED);
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*bm.getAddr32(1, 1) = SkPackARGB32(0xFF, 0x00, 0xFF, 0x00);
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*bm.getAddr32(2, 1) = SkPackARGB32(0xFF, 0x00, 0x00, 0xFF);
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*bm.getAddr32(1, 2) = SkPackARGB32(0xFF, 0x00, 0xFF, 0xFF);
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*bm.getAddr32(2, 2) = SkPackARGB32(0xFF, 0x88, 0x88, 0x88);
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return bm.asImage();
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}
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/*
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* This GM creates an image with a 2x2:
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* Green | Blue
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* ------------
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* Cyan | Gray
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* block of pixels in one corner of a 33x33 field. The 'srcRect' feature of the
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* SkMagnifierImageFilter is then used to blow it up with different inset border widths.
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*
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* In GPU-mode we wind up drawing 4 rects:
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*
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* BottomLeft origin + 1-wide inset | TopLeft origin + 1-wide inset
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* ----------------------------------------------------------------
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* BottomLeft origin + 7-wide inset | TopLeft origin + 7-wide inset
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*
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* In Raster-mode the source origin isn't used.
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*/
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class SimpleMagnificationGM : public skiagm::GM {
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public:
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SimpleMagnificationGM() {
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this->setBGColor(0xFFCCCCCC);
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}
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protected:
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SkString onShortName() override {
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return SkString("simple-magnification");
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}
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SkISize onISize() override {
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return SkISize::Make(3*kPad+2*kImgSize, 3*kPad+2*kImgSize);
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}
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void draw(SkCanvas* canvas, sk_sp<SkImage> image, const SkIPoint& offset, int inset) {
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sk_sp<SkImageFilter> imgSrc(SkImageFilters::Image(std::move(image)));
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SkRect srcRect = SkRect::MakeXYWH(1.0f, 1.0f, 2.0f, 2.0f);
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sk_sp<SkImageFilter> magFilter(SkImageFilters::Magnifier(srcRect, inset, imgSrc));
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SkPaint paint;
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paint.setImageFilter(std::move(magFilter));
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canvas->save();
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canvas->translate(offset.fX, offset.fY);
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SkRect rect = SkRect::MakeWH(kImgSize, kImgSize);
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canvas->drawRect(rect, paint);
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canvas->restore();
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}
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DrawResult onDraw(SkCanvas* canvas, SkString* errorMsg) override {
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auto context = canvas->recordingContext();
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sk_sp<SkImage> bottomLImg = make_image(context, kImgSize, kBottomLeft_GrSurfaceOrigin);
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sk_sp<SkImage> topLImg = make_image(context, kImgSize, kTopLeft_GrSurfaceOrigin);
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if (!bottomLImg || !topLImg) {
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*errorMsg = "Could not load images. Did you forget to set the resourcePath?";
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return DrawResult::kFail;
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}
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int bigOffset = 2 * kPad + kImgSize;
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this->draw(canvas, bottomLImg, SkIPoint::Make(kPad, kPad), 1);
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this->draw(canvas, topLImg, SkIPoint::Make(bigOffset, kPad), 1);
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this->draw(canvas, bottomLImg, SkIPoint::Make(kPad, bigOffset), 7);
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this->draw(canvas, topLImg, SkIPoint::Make(bigOffset, bigOffset), 7);
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return DrawResult::kOk;
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}
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private:
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static const int kImgSize = 33;
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static const int kPad = 2;
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using INHERITED = skiagm::GM;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM(return new SimpleMagnificationGM;)
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