skia2/gm/simple_magnification.cpp
Ben Wagner 7fde8e1728 IWYU for gms.
This almost gets gms to be iwyu clean. The last bit is around gm.cpp
and the tracing framework and its use of atomic. Will also need a way
of keeping things from regressing, which is difficult due to needing to
do this outside-in.

Change-Id: I1393531e99da8b0f1a29f55c53c86d53f459af7d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/211593
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
2019-05-02 17:48:53 +00:00

146 lines
4.9 KiB
C++

/*
* 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;)