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/*
* Copyright 2018 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 "Resources.h"
#include "SkGradientShader.h"
#include "SkImage.h"
#include "SkPath.h"
#include "SkSurface.h"
#include "sk_tool_utils.h"
static sk_sp<SkImage> make_image1() { return GetResourceAsImage("images/mandrill_128.png"); }
static sk_sp<SkImage> make_image2() {
return GetResourceAsImage("images/brickwork-texture.jpg")->makeSubset({0, 0, 128, 128});
}
namespace skiagm {
class PerspImages : public GM {
public:
PerspImages() = default;
protected:
SkString onShortName() override { return SkString("persp_images"); }
SkISize onISize() override { return SkISize::Make(1150, 1280); }
void onOnceBeforeDraw() override {
fImages.push_back(make_image1());
fImages.push_back(make_image2());
}
void onDraw(SkCanvas* canvas) override {
SkTDArray<SkMatrix> matrices;
matrices.push()->setAll(1.f, 0.f, 0.f,
0.f, 1.f, 0.f,
0.f, 0.005f, 1.f);
matrices.push()->setAll(1.f, 0.f, 0.f,
0.f, 1.f, 0.f,
0.007f, -0.005f, 1.f);
matrices[1].preSkew(0.2f, -0.1f);
matrices[1].preRotate(-65.f);
matrices[1].preScale(1.2f, .8f);
matrices[1].postTranslate(0.f, 60.f);
SkPaint paint;
int n = 0;
SkRect bounds = SkRect::MakeEmpty();
for (const auto& img : fImages) {
SkRect imgB = SkRect::MakeWH(img->width(), img->height());
for (const auto& m : matrices) {
SkRect temp;
m.mapRect(&temp, imgB);
bounds.join(temp);
}
}
canvas->translate(-bounds.fLeft + 10.f, -bounds.fTop + 10.f);
canvas->save();
enum class DrawType {
kDrawImage,
kDrawImageRectStrict,
kDrawImageRectFast,
};
for (auto type :
{DrawType::kDrawImage, DrawType::kDrawImageRectStrict, DrawType::kDrawImageRectFast}) {
for (const auto& m : matrices) {
for (auto aa : {false, true}) {
paint.setAntiAlias(aa);
for (auto filter : {kNone_SkFilterQuality, kLow_SkFilterQuality,
kMedium_SkFilterQuality, kHigh_SkFilterQuality}) {
for (const auto& img : fImages) {
paint.setFilterQuality(filter);
canvas->save();
canvas->concat(m);
SkRect src = {img->width() / 4.f, img->height() / 4.f,
3.f * img->width() / 4.f, 3.f * img->height() / 4};
SkRect dst = {0, 0,
3.f / 4.f * img->width(), 3.f / 4.f * img->height()};
switch (type) {
case DrawType::kDrawImage:
canvas->drawImage(img, 0, 0, &paint);
break;
case DrawType::kDrawImageRectStrict:
canvas->drawImageRect(img, src, dst, &paint,
SkCanvas::kStrict_SrcRectConstraint);
break;
case DrawType::kDrawImageRectFast:
canvas->drawImageRect(img, src, dst, &paint,
SkCanvas::kFast_SrcRectConstraint);
break;
}
canvas->restore();
++n;
if (n < 8) {
canvas->translate(bounds.width() + 10.f, 0);
} else {
canvas->restore();
canvas->translate(0, bounds.height() + 10.f);
canvas->save();
n = 0;
}
}
}
}
}
}
canvas->restore();
}
private:
static constexpr int kNumImages = 4;
SkTArray<sk_sp<SkImage>> fImages;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new PerspImages();)
} // namespace skiagm
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