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