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